CN118684480A - Carbon mineralized inorganic artificial stone and preparation method thereof - Google Patents

Abstract

The application discloses a carbon mineralized inorganic artificial stone and a preparation method thereof, wherein the carbon mineralized inorganic artificial stone is prepared from the following raw materials: modified powder, auxiliary materials, inorganic filler, solid waste aggregate, fiber, water repellent and water reducer; the preparation raw materials of the modified powder comprise solid waste powder, phenol compounds and reinforcing agents; the mass ratio of the solid waste powder to the phenol compound is 1 (0.05-0.5); the mass ratio of the phenol compound to the reinforcing agent is 1 (0.1-1.2). The phenol compounds introduced into the modified solid waste powder have benzene ring structures, so that the dispersibility among the solid waste powder is improved, the agglomeration phenomenon of the powder is reduced, and the stress uniformity of the carbon mineralized inorganic artificial stone is improved. The advanced introduction of the reinforcing agent not only can cooperate with the phenol compound to modify the solid waste powder, but also can improve the bonding strength among the components so as to improve the compactness and the product performance. The carbon mineralized inorganic artificial stone obtained by the application has high mechanical strength, good impermeability and luster through raw material compounding and process adjustment.

Description

Carbon mineralized inorganic artificial stone and preparation method thereof

Technical Field

The invention relates to the technical field of building materials, in particular to a carbon mineralized inorganic artificial stone and a preparation method thereof.

Background

Artificial stone is one of the commonly used building materials at present, and is divided into organic type negative carbon stone plates and inorganic type negative carbon stone plates. Most of the organic artificial boards adopt adhesives such as phenolic aldehyde reinforcing agents, urea aldehyde reinforcing agents and the like, and can have adverse effects on human bodies; the inorganic board is a product formed by compounding various natural aggregates by taking cement as a main cementing raw material, is superior to resin-type artificial stone in high-temperature resistance and fire resistance, has the characteristics of no toxicity, no pollution and the like, can be applied to the decoration field, adopts high-carbon-emission raw materials, and is not beneficial to popularization of green buildings.

The inorganic artificial stone has the defects of low strength, toughness, poor permeability resistance and the like due to certain defects of the inorganic material, and as disclosed in Chinese patent application CN117645439A, the main raw materials of the inorganic artificial stone comprise artificial stone aggregate, cement, auxiliary cementing materials and fillers, the compressive strength of the obtained product reaches above 110MPa, the flexural strength reaches above 22MPa, and although the relatively excellent mechanical properties can be obtained, the high-carbon-emission raw material cement is added into the raw materials, so that the carbon reduction is not facilitated. The preparation of the solid waste-based carbon mineralized inorganic artificial stone with carbon negative, green, excellent performance and high glossiness is still in full challenge.

Disclosure of Invention

In order to overcome the defects, one of the purposes of the invention is to prepare the solid waste-based carbon mineralized inorganic artificial stone with high mechanical strength, good impermeability and luster through further raw material compounding and process adjustment.

In order to achieve the above purpose, the invention adopts the following technical scheme: the preparation raw materials of the carbon mineralized inorganic artificial stone comprise modified powder, auxiliary materials, inorganic filler, solid waste aggregate, fiber, water repellent and water reducer;

Further, in the raw materials for preparing the carbon mineralized inorganic artificial stone, 15-70 parts by mass of modified powder, 3-25 parts by mass of auxiliary materials, 5-28 parts by mass of inorganic filler, 20-120 parts by mass of solid waste aggregate, 1-7 parts by mass of fiber, 0.2-2.0 parts by mass of water repellent and 0.2-1.5 parts by mass of water reducer are prepared.

Illustratively, the modified powder is in a range of 15 parts, 20 parts, 25 parts, 30 parts, 40 parts, 50 parts, 60 parts, 70 parts, or any two thereof; the auxiliary materials are 3 parts, 5 parts, 10 parts, 15 parts, 20 parts, 25 parts or any two parts of the ranges; the inorganic filler is 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 28 parts or any two of the above ranges; the solid waste aggregate is 20 parts, 40 parts, 60 parts, 80 parts, 100 parts, 120 parts or any two of the above ranges; the fiber is 1 part, 3 parts, 5 parts, 7 parts or any two of them; the water repellent is 0.2 part, 0.5 part, 1.0 part, 1.5 parts, 2.0 parts or any two of the above ranges; the water reducer is in a range of 0.2 part, 0.5 part, 0.7 part, 1.0 part, 1.2 parts, 1.5 parts or any two of the above.

Preferably, in the raw materials for preparing the carbon mineralized inorganic artificial stone, the modified powder is 20-51 parts by mass, the auxiliary materials are 6-16 parts by mass, the inorganic filler is 7-20 parts by mass, the solid waste aggregate is 35-90 parts by mass, the fiber is 2-5 parts by mass, the water repellent is 0.3-0.8 part by mass, and the water reducer is 0.3-0.8 part by mass.

Further, the auxiliary materials are selected from any one or two of quartz powder and granite.

Further, the average particle size of the auxiliary materials is 150-400 meshes;

Preferably, the average particle size of the auxiliary material is 200-300 meshes.

Further, the inorganic filler is selected from any one or more of slag, fly ash and fine tailings;

Preferably, the inorganic filler is selected from any one or more of slag and fly ash.

Further, the average particle diameter of the inorganic filler is 50-300 meshes;

preferably, the inorganic filler has an average particle size of 60 to 240 mesh.

Further, the solid waste aggregate is selected from any one or more of steel slag particles, magnesium slag particles, saw mud, coarse tailings and waste concrete particles;

preferably, the solid waste aggregate is selected from any one or more of steel slag particles and magnesium slag particles.

Further, the average grain diameter of the solid waste aggregate is 0.01-8mm;

Preferably, the average particle size of the solid waste aggregate is 0.01-5mm.

Further, the fiber is selected from any one or more of basalt fiber, polypropylene fiber and glass fiber;

Preferably, the fibers are selected from any one or more of basalt fibers and polypropylene fibers.

Further, the fibers have an average diameter of 10-20 μm and a length of 8-19 mm.

Further, the water repellent is selected from any one or more of octyl triethoxysilane, calcium stearate and methyl calcium silicate;

Preferably, the water repellent is selected from any one or more of octyl triethoxysilane and calcium stearate.

Further, the water reducing agent is selected from any one or more of polycarboxylate water reducing agents and naphthalene water reducing agents;

preferably, the water reducing agent is a polycarboxylate water reducing agent.

Further, the preparation raw materials of the modified powder comprise solid waste powder, phenol compounds and reinforcing agents;

Further, the preparation raw materials of the modified powder material comprise, by mass: 30-70 parts of solid waste powder, 3-20 parts of phenol compounds and 1-18 parts of reinforcing agents.

Illustratively, the solid waste powder is in a range of 30 parts, 40 parts, 50 parts, 60 parts, 70 parts, or any two thereof; the phenol compound is 3 parts, 5 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts or any two of the above; the reinforcing agent is 1 part, 2 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts or any two of them.

Further, the solid waste raw materials used for preparing the solid waste powder are at least one of steel slag, magnesium slag, calcium silicate slag, blast furnace slag, coal gangue, carbide slag, alkaline slag, zero slag and thiourea slag;

Preferably, the solid waste raw material used for preparing the solid waste powder is at least one of steel slag, magnesium slag, silicon-calcium slag and blast furnace slag.

Wherein the silicon-calcium slag is the silicon-calcium slag after aluminum extraction treatment.

Further, the solid waste powder is obtained by wet grinding the solid waste raw material.

Further, the wet grinding treatment comprises the following specific steps: at room temperature, maintaining the water content of the solid waste raw material at 30-70%, wet-milling for 0.5-2h, and drying at 40-60 ℃ until the water content is 5-10%, thereby obtaining solid waste powder, and distributing alkali metal salt on the solid waste powder after wet-milling treatment.

Further, the average particle size of the solid waste powder is 100-300 meshes.

Further, the phenol compound is at least one of resorcinol, m-aminophenol, 4-methylcatechol, 4-isopropylphenol and 2-sec-butylphenol.

Further, the reinforcing agent is at least one of polyacrylic acid and vinyl chloride-vinyl acetate copolymer;

Preferably, the reinforcing agent is polyacrylic acid.

Further, the mass ratio of the solid waste powder to the phenol compound is 1 (0.05-0.5);

Illustratively, the mass ratio of the solid waste powder to the phenolic compound is in the range of 1:0.05, 1:0.1, 1:0.2, 1:0.3, 1:0.4, 1:0.5, or any two thereof;

Preferably, the mass ratio of the solid waste powder to the phenol compound is 1 (0.1-0.3).

Further, the mass ratio of the phenol compound to the reinforcing agent is 1 (0.1-1.2);

Illustratively, the mass ratio of phenolic compound to reinforcing agent is in the range of 1:0.1, 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, or any two thereof.

Preferably, the mass ratio of the phenol compound to the reinforcing agent is 1: (0.3-0.9).

Further, the preparation method of the modified powder comprises the following steps:

(1) Taking solid waste powder, sequentially adding a phenol compound and an enhancer, and uniformly stirring to obtain a mixed material;

(2) And (3) placing the mixed materials into a mineralization reaction kettle, replacing air with carbon dioxide-containing gas, pressurizing to 0.1-1MPa, heating to 60-100 ℃, carrying out heat preservation reaction for 1-8h, and grinding the product after the reaction is finished to obtain modified powder.

Preferably, the preparation steps of the modified powder material comprise:

(1) Taking 30-70 parts of solid waste powder (100-300 meshes) subjected to wet grinding treatment, sequentially adding 3-20 parts of phenol compounds and 1-18 parts of reinforcing agents, and stirring for 5-10min to obtain a mixed material;

(2) And (3) placing the mixed materials into a mineralization reaction kettle, replacing air with a gas containing carbon dioxide, pressurizing to 0.1-0.5MPa, heating to 80-100 ℃, carrying out heat preservation reaction for 2-6h, and grinding the product to 200-500 meshes after the reaction is finished to obtain the modified powder.

Under the condition of pressurizing and heating, the phenol compound and alkali metal salt in the solid waste powder after wet grinding treatment generate phenolate, phenol hydroxyl ortho carbon is activated, nucleophilic addition reaction is carried out with carbon dioxide, more carbon dioxide is consumed, and the reaction product can also cooperate with carboxyl in the enhancer structure and metal ions on the surface of the solid waste powder to form stable coordination relation, so as to generate a complex, and effectively fill and seal pores and cracks of the solid waste powder.

Further, the mass concentration of carbon dioxide in the carbon dioxide-containing gas is 8-100%;

preferably, the carbon dioxide is present in the carbon dioxide-containing gas in a mass concentration of 50-100%.

Further, the carbon dioxide-containing gas also contains a gas such as nitrogen, oxygen, or water vapor.

The second aspect of the invention provides a method for preparing a carbon mineralized inorganic artificial stone, comprising the following steps:

s1, uniformly mixing modified powder, auxiliary materials, solid waste aggregate, fibers, a water reducing agent, a water repellent and water to obtain carbon mineralized inorganic artificial stone slurry, and keeping the water content of the carbon mineralized inorganic artificial stone slurry to be 8-15wt%;

s2, scattering the carbon mineralized inorganic artificial stone slurry, distributing, conveying to a press, and vibrating and pressing the mixed material in a vacuum state to obtain a carbon mineralized inorganic artificial stone blank fixed by a die;

s3, conveying the carbon mineralized inorganic artificial stone blank with the mould into a steam curing box for curing;

s4, after curing, sending the mixture into a mineralization reaction kettle for reaction, and after replacing air with gas containing carbon dioxide, carrying out mineralization reaction;

And S5, after the reaction is finished, demolding, drying, fixing the thickness, grinding, polishing and protecting to obtain the carbon mineralized inorganic artificial stone.

Preferably, in the step S2, the vacuum degree of vibration pressing is-0.09 to-0.1 MPa, and the pressure head pressure is 0.1 to 5MPa;

in the step S3, the curing temperature is 40-100 ℃ and the curing time is 2-10 h;

In the step S4, the mineralization reaction pressure is 0.1-1MPa, the temperature is 60-100 ℃, and the reaction time is 1-8h.

Preferably, in step S1, the water content is maintained at 10-15wt%;

In the step S2, the vacuum degree of vibration pressing is-0.09 to-0.1 MPa, and the pressure head pressure is 0.5 to 2MPa;

in the step S3, the curing temperature is 50-70 ℃ and the curing time is 6-8h;

in the step S4, the mineralization reaction pressure is 0.1-1MPa, the temperature is 70-90 ℃ and the reaction time is 2-4h.

The beneficial effects of the invention are as follows:

The carbon mineralized inorganic artificial stone with high mechanical strength, high carbon fixation rate, low water absorption and good glossiness is prepared by taking modified powder, auxiliary materials, inorganic filler, solid waste aggregate, fiber, water repellent and water reducing agent as raw materials; the modification degree of the solid waste powder is regulated and controlled by strictly controlling the mass ratio of the solid waste powder to the phenol compound and the mass ratio of the phenol compound to the reinforcing agent, so that the properties of the carbon mineralized inorganic artificial stone are optimized.

The phenol compounds introduced into the modified solid waste powder have benzene ring structures, so that the dispersibility among the solid waste powder is improved, the agglomeration phenomenon of the powder is reduced, and the stress uniformity of the carbon mineralized inorganic artificial stone is improved. Similarly, the advanced introduction of the reinforcing agent not only can cooperate with the phenol compound to modify the solid waste powder, but also can improve the bonding strength among the components so as to improve the compactness and the product performance.

3) The addition of the inorganic filler plays a role in material grading and improves the strength of the carbon mineralized inorganic artificial stone; the addition of the auxiliary materials further improves the strength of the product, and simultaneously endows the product with certain glossiness, and improves the aesthetic degree of the product.

4) Adding phenol compounds and reinforcing agents into the solid waste powder obtained by wet grinding treatment as solid waste powder modifying agents, and introducing carbon dioxide-containing gas to mineralize and modify the solid waste powder to obtain modified solid waste powder. Under the condition of heating and pressurizing, the phenol compound and alkali metal salt form phenolate, the phenol hydroxyl ortho-carbon is activated, nucleophilic addition reaction is carried out with carbon dioxide, on one hand, the product possibly forms a stable coordination relationship with carboxyl in the reinforcing agent structure and metal ions on the surface of the solid waste powder to form a complex, so that the pores and cracks on the surface of the solid waste powder are effectively filled and sealed, a layer of compact protective film is formed, the compactness and impermeability of the system are improved, and the mechanical strength and the water absorbability of the product are improved. On the other hand, the process absorbs more carbon dioxide, and the recycling of the carbon dioxide is facilitated.

5) The modified powder which is mineralized in advance can be used as crystal nucleus, which is beneficial to the mineralization reaction in the step S4 in the preparation process of the carbon mineralized inorganic artificial stone.

Detailed Description

The following detailed description of the present invention will provide further details in order to make the above-mentioned objects, features and advantages of the present invention more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

Except where shown or otherwise indicated in the operating examples, all numbers expressing quantities of ingredients, physical and chemical properties, and so forth, used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that can be varied appropriately by those skilled in the art utilizing the desired properties sought to be obtained by the teachings disclosed herein. The use of numerical ranges by endpoints includes all numbers subsumed within that range and any range within that range, e.g., 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4, 5, and the like.

In some embodiments, a carbon mineralized inorganic artificial stone is prepared from the following raw materials in mass:

raw material I: auxiliary materials

3-25 Parts of auxiliary materials, preferably 6-16 parts of auxiliary materials, and the auxiliary materials are used for improving the glossiness and strength of the carbon mineralized inorganic artificial stone.

The auxiliary material is selected from any one of quartz powder and granite, preferably quartz powder.

The average particle size of the auxiliary material is 150-400 meshes, preferably 200-300 meshes.

The auxiliary materials improve the mechanical strength of the carbon mineralized inorganic artificial stone, optimize the glossiness of the carbon mineralized inorganic artificial stone and improve the aesthetic degree of the product.

Raw materials II: inorganic filler

5 To 28 parts, preferably 7 to 20 parts,

The inorganic filler is selected from any one or more of slag, fly ash and fine tailings, preferably from any one or more of slag and fly ash;

the average particle size of the inorganic filler is 50 to 300 mesh, preferably 60 to 240 mesh.

And (3) raw materials: solid waste aggregate

20-120 Parts of solid waste aggregate, preferably 35-90 parts;

The solid waste aggregate is selected from any one or more of steel slag particles, magnesium slag particles, saw mud, coarse tailings and waste concrete particles, and is preferably selected from any one or more of steel slag particles and magnesium slag particles;

The average particle size of the solid waste aggregate is 0.01-8mm, preferably 0.01-5mm.

The inorganic filler and the solid waste aggregate are used for grading between raw materials. The solid waste aggregate with large grain size is used for strength support, the inorganic filler with small grain size is used for pore filling, and the stacking density is improved through grading between coarse and fine aggregates, so that the structural compactness of the inside of the product is improved, and the mechanical property is improved.

And (3) raw materials: fiber

1-7 Parts of fiber, preferably 2-5 parts;

The fiber is selected from any one or more of basalt fiber, polypropylene fiber and glass fiber, preferably from any one or more of basalt fiber and polypropylene fiber;

The average diameter of the fiber is 10-20 μm, and the length is 8-19 mm.

Raw materials five: water repellent

0.2-2.0 Parts of water repellent, preferably 0.3-0.8 parts;

The water repellent is selected from one or more of octyl triethoxysilane, calcium stearate and methyl calcium silicate, preferably from one or more of octyl triethoxysilane and calcium stearate.

Raw materials six: water reducing agent

0.2-1.5 Parts of water reducer, preferably 0.3-0.8 parts;

The water reducing agent is selected from one or more of polycarboxylate water reducing agent and naphthalene water reducing agent, preferably polycarboxylate water reducing agent.

Raw material seven: modified powder

15-70 Parts of modified powder, preferably 20-51 parts;

The modified powder is solid waste powder obtained by modifying solid waste powder after wet grinding treatment. Namely: adding phenol compounds and reinforcing agents into the wet-ground solid waste powder as solid waste powder modifying agents, and introducing carbon dioxide-containing gas to mineralize and modify the solid waste powder to obtain modified powder.

Under the condition of heating and pressurizing, the phenol compound and alkali metal salt form phenolate, the phenol hydroxyl ortho-carbon is activated, and the phenolate and the carbonyl carbon of carbon dioxide react in an addition way, the product synergistic reinforcing agent and metal ions on the surface of the solid waste powder form a stable coordination relation to form a complex, so that the pores and cracks on the surface of the solid waste powder are effectively filled and sealed, a layer of compact protective film is formed, the compactness and impermeability of the system are improved, the mechanical strength of the product is improved, and the water absorption of the product is reduced.

In some embodiments, the modified powder is prepared from the following raw materials in mass: 30-70 parts of solid waste powder, 3-20 parts of phenol compounds and 1-18 parts of reinforcing agents.

In some embodiments, the solid waste raw material used for preparing the solid waste powder is at least one of steel slag, magnesium slag, calcium silicate slag, blast furnace slag, coal gangue, carbide slag, alkali slag, zero slag and thiourea slag.

In some embodiments, the solid waste raw material used for preparing the solid waste powder is at least one of steel slag, magnesium slag, calcium silicate slag and blast furnace slag.

Wherein the silicon-calcium slag is the silicon-calcium slag after aluminum extraction treatment.

In some embodiments, the solid waste powder is obtained by wet grinding the solid waste raw material, namely, at normal temperature, maintaining the water content of the solid waste raw material to be 30-70%, wet grinding for 0.5-2h, and then drying at 40-60 ℃ until the water content is 5-10%, thus obtaining the solid waste powder. Alkali metal salt is distributed on the surface of the wet grinding solid waste powder.

In some embodiments, the solid waste powder has an average particle size of 100-300 mesh.

In some embodiments, the phenolic compound is at least one of resorcinol, m-aminophenol, 4-methylcatechol, 4-isopropylphenol, 2-sec-butylphenol;

The benzene ring structure in the phenol compound improves the dispersibility between solid waste powder, reduces the agglomeration phenomenon of powder, and improves the stress uniformity of the carbon mineralized inorganic artificial stone. In addition, the product of nucleophilic addition reaction of phenolic compound and carbon dioxide, the synergistic reinforcing agent generates complex on the surface of solid waste powder to fill pores, and forms a layer of compact protective film on the surface of solid waste, thereby improving the compactness of the product, improving various properties of the product and consuming more carbon dioxide.

In some embodiments, the reinforcing agent is at least one of polyacrylic acid, vinyl chloride and vinyl acetate;

In some embodiments, the reinforcing agent is polyacrylic acid.

The introduction of the reinforcing agent can cooperate with the product formed by nucleophilic addition of the phenol compound and carbon dioxide to form a complex on the surface of the solid waste powder, so that the tiny pores of the solid waste powder are filled to form a layer of compact protective film, the compactness and impermeability of the system are improved, the bonding strength among the components is also improved, and the compactness of the product is improved, thereby improving the product performance.

In some embodiments, the mass ratio of the solid waste powder to the phenol compound is 1 (0.05-0.5);

in some embodiments, the mass ratio of the solid waste powder to the phenolic compound is 1 (0.1-0.3).

In some embodiments, the mass ratio of phenolic compound to reinforcing agent is 1 (0.1-1.2);

In some embodiments, the mass ratio of phenolic compound to reinforcing agent is 1 (0.3-0.9).

The preparation method of the carbon mineralized inorganic artificial stone comprises the following steps:

s1, uniformly mixing the modified powder, auxiliary materials, solid waste aggregate, fibers, a water reducer, a water repellent and water to obtain carbon mineralized inorganic artificial stone slurry, wherein the water content of the carbon mineralized inorganic artificial stone slurry is kept to be 8-15 wt%, and preferably 10-15wt%.

S2, scattering the carbon mineralized inorganic artificial stone slurry, distributing, conveying to a press, and vibrating and pressing the mixed material in a vacuum state to obtain a carbon mineralized inorganic artificial stone blank fixed by a die; the vacuum degree is-0.09 to-0.1 MPa, and the pressure head pressure is 0.1 to 5MPa, preferably 0.5 to 2MPa.

S3, conveying the carbon mineralized inorganic artificial stone blank with the mould into a steam curing box for curing, wherein the curing temperature is 40-100 ℃, preferably 50-70 ℃, and the curing time is 2-10 h, preferably 6-8h.

S4, after curing, sending the mixture into a mineralization reaction kettle for reaction, replacing air with carbon dioxide-containing gas, pressurizing to 0.1-1MPa, heating to 60-100 ℃, preferably 70-90 ℃, and carrying out heat preservation reaction for 1-8 hours, preferably 2-4 hours;

And S5, after the reaction is finished, demolding, drying, fixing the thickness, grinding, polishing and protecting to obtain the carbon mineralized inorganic artificial stone.

Wherein, the modified powder preparation steps comprise:

(1) Taking solid waste powder, sequentially adding a phenol compound and an enhancer, and uniformly stirring to obtain a mixed material;

(2) And (3) placing the mixed materials into a mineralization reaction kettle, replacing air with carbon dioxide-containing gas, pressurizing to 0.1-1MPa, heating to 60-100 ℃, carrying out heat preservation reaction for 1-8h, and grinding the product after the reaction is finished to obtain modified powder.

In some embodiments, the modified powder making step comprises:

(1) Taking 30-70 parts of solid waste powder (100-300 meshes) subjected to wet grinding treatment, sequentially adding 3-20 parts of phenol compounds and 1-18 parts of reinforcing agents, uniformly mixing, and stirring for 5-10min to obtain a mixed material;

(2) And (3) placing the mixed materials into a mineralization reaction kettle, replacing air with a gas containing carbon dioxide, pressurizing to 0.1-0.5MPa, heating to 80-100 ℃, carrying out heat preservation reaction for 2-6h, and grinding the product to 200-500 meshes after the reaction is finished to obtain the modified powder.

In some embodiments, the carbon dioxide concentration in the carbon dioxide-containing gas is 8-100%;

in some embodiments, the concentration of carbon dioxide in the carbon dioxide-containing gas is 50-100%;

In some embodiments, the carbon dioxide-containing gas further comprises nitrogen, oxygen, water vapor, and the like.

Examples

The present disclosure is more particularly described in the following examples that are intended as illustrations only, since various modifications and changes within the scope of the present disclosure will be apparent to those skilled in the art. Unless otherwise indicated, all parts, percentages, and ratios reported in the examples below are on a mass basis, and all reagents used in the examples are commercially available or were obtained synthetically according to conventional methods and can be used directly without further treatment, as well as the instruments used in the examples.

Example 1

The preparation raw materials of the carbon mineralized inorganic artificial stone comprise: 36 parts of modified powder (300 meshes), 10.8 parts of auxiliary material quartz powder (250 meshes), 13.6 parts of inorganic filler slag (160 meshes), 63 parts of solid waste aggregate steel slag particles (2 mm), 1.8 parts of fiber basalt fiber (with the diameter of 15 mu m and the length of 15 mm), 0.5 part of water reducer polycarboxylate water reducer and 0.5 part of water repellent octyl triethoxysilane.

A method for preparing a carbon mineralized inorganic artificial stone, which comprises the following steps:

S1, preparing carbon mineralized inorganic artificial stone slurry

S11, taking 50 parts of 200-mesh solid waste powder (steel slag) subjected to wet grinding treatment, sequentially adding 10 parts of phenol compounds (resorcinol) and 6.5 parts of reinforcing agents (polyacrylic acid), uniformly mixing, and stirring for 8min to obtain a mixed material;

wherein, wet grinding treatment of solid waste powder (steel slag) is as follows: and (3) maintaining the water content of the solid waste raw steel slag at 50% at room temperature, wet-grinding for 1.3h, and drying at 50 ℃ until the water content is 8%, thereby obtaining the solid waste powder.

S12, placing the mixed materials into a mineralization reaction kettle, replacing air with carbon dioxide-containing gas with the carbon dioxide concentration of 90%, pressurizing to 0.1MPa, heating to 90 ℃, preserving heat for 4 hours, and grinding the product to 300 meshes after the reaction is finished to obtain modified powder;

S13, uniformly mixing 36 parts of modified powder, 10.8 parts of auxiliary materials (quartz powder), 13.6 parts of inorganic filler (slag), 63 parts of solid waste aggregate (steel slag particles), 1.8 parts of fiber (basalt fiber), 0.5 part of water reducer (polycarboxylate water reducer), 0.5 part of water repellent (octyl triethoxysilane) and water to obtain carbon mineralized inorganic artificial stone slurry, wherein the water content of the carbon mineralized inorganic artificial stone slurry is kept to be 12%wt;

S2, scattering the carbon mineralized inorganic artificial stone slurry, distributing, conveying to a press, and vibrating and pressing the mixed material in a vacuum state to obtain a carbon mineralized inorganic artificial stone blank fixed by a die; the vacuum degree is-0.09 MPa, and the pressure head pressure is 1.5MPa.

S3, conveying the carbon mineralized inorganic artificial stone blank with the mould into a steam curing box for curing, wherein the curing temperature is 60 ℃, and the curing time is 7h.

S4, after curing, sending the mixture into a mineralization reaction kettle for reaction, replacing air with carbon dioxide-containing gas, pressurizing to 0.5MPa, heating to 80 ℃, and preserving heat for reaction for 3 hours;

And S5, after the reaction is finished, demolding, drying, fixing the thickness, grinding, polishing and protecting to obtain the carbon mineralized inorganic artificial stone.

In this example, the mass ratio of the solid waste powder (steel slag) to the phenol compound (resorcinol) was 50:10=1:0.2, and the mass ratio of the phenol compound (resorcinol) to the reinforcing agent (polyacrylic acid) was 10:6.5=1:0.65.

Example 2

The preparation raw materials of the carbon mineralized inorganic artificial stone comprise: 20 parts of modified powder (250 meshes), 6 parts of auxiliary material quartz powder (200 meshes), 7.5 parts of inorganic filler slag (60 meshes), 35 parts of solid waste aggregate steel slag particles (4 mm), 1 part of fiber basalt fiber (with the diameter of 13 mu m and the length of 16 mm), 0.3 part of water reducer polycarboxylate superplasticizer and 0.3 part of water repellent octyl triethoxysilane.

A method for preparing a carbon mineralized inorganic artificial stone, which comprises the following steps:

S1, preparing carbon mineralized inorganic artificial stone slurry

S11, taking 30 parts of 130-mesh solid waste powder (steel slag) subjected to wet grinding treatment, sequentially adding 3 parts of phenol compounds (resorcinol) and 1 part of reinforcing agents (polyacrylic acid), uniformly mixing, and stirring for 6min to obtain a mixed material;

wherein, wet grinding treatment of solid waste powder (steel slag) is as follows: at room temperature, maintaining the water content of 35% of the solid waste raw steel slag, wet-grinding for 2 hours, and then drying at 40 ℃ until the water content is 5%, thus obtaining the solid waste powder.

S12, placing the mixed materials into a mineralization reaction kettle, replacing air with carbon dioxide-containing gas with the carbon dioxide concentration of 70%, pressurizing to 0.5MPa, heating to 80 ℃, preserving heat and reacting for 6 hours, and grinding the product to 230 meshes after the reaction is finished to obtain modified powder;

s13, uniformly mixing 20 parts of modified powder, 6 parts of auxiliary materials (quartz powder), 7.5 parts of inorganic filler (slag), 35 parts of solid waste aggregate (steel slag particles), 1 part of fiber (basalt fiber), 0.3 part of water reducer (polycarboxylate water reducer), 0.3 part of water repellent (octyl triethoxysilane) and water to obtain carbon mineralized inorganic artificial stone slurry, wherein the water content of the carbon mineralized inorganic artificial stone slurry is kept to be 10%wt;

s2, scattering the carbon mineralized inorganic artificial stone slurry, distributing, conveying to a press, and vibrating and pressing the mixed material in a vacuum state to obtain a carbon mineralized inorganic artificial stone blank fixed by a die; the vacuum degree is-0.1 MPa, and the pressure head pressure is 1MPa.

S3, conveying the carbon mineralized inorganic artificial stone blank with the mould into a steam curing box for curing, wherein the curing temperature is 50 ℃, and the curing time is 8 hours.

S4, after curing, sending the mixture into a mineralization reaction kettle for reaction, replacing air with carbon dioxide-containing gas, pressurizing to 0.2MPa, heating to 90 ℃, and preserving heat for reaction for 4 hours.

And S5, after the reaction is finished, demolding, drying, fixing the thickness, grinding, polishing and protecting to obtain the carbon mineralized inorganic artificial stone.

In this example, the mass ratio of the solid waste powder (steel slag) to the phenol compound (resorcinol) was 30:3=1:0.1, and the mass ratio of the phenol compound (resorcinol) to the reinforcing agent (polyacrylic acid) was 3:1=1:0.33.

Example 3

The preparation raw materials of the carbon mineralized inorganic artificial stone comprise: 51 parts of modified powder (450 meshes), 15.5 parts of auxiliary material quartz powder (280 meshes), 19.5 parts of inorganic filler slag (200 meshes), 90 parts of solid waste aggregate steel slag particles (1 mm), 2.6 parts of fiber basalt fibers (with the diameter of 20 mu m and the length of 10 mm), 0.8 part of water reducer polycarboxylate water reducer and 0.8 part of water repellent octyl triethoxysilane.

A method for preparing a carbon mineralized inorganic artificial stone, which comprises the following steps:

S1, preparing carbon mineralized inorganic artificial stone slurry

S11, taking 70 parts of 270-mesh solid waste powder (steel slag) subjected to wet grinding treatment, sequentially adding 20 parts of phenol compounds (resorcinol) and 18 parts of reinforcing agents (polyacrylic acid), uniformly mixing, and stirring for 10min to obtain a mixed material;

Wherein, wet grinding treatment of solid waste powder (steel slag) is as follows: and (3) maintaining the water content of the solid waste raw steel slag at 65% at room temperature, wet-grinding for 0.5h, and drying at 60 ℃ until the water content is 10%, thereby obtaining the solid waste powder.

S12, placing the mixed materials into a mineralization reaction kettle, replacing air with carbon dioxide-containing gas with carbon dioxide concentration of 80%, pressurizing to 0.3MPa, heating to 100 ℃, preserving heat and reacting for 2h, and grinding the product to 450 meshes after the reaction is finished to obtain modified powder;

S13, uniformly mixing 51 parts of modified powder, 15.5 parts of auxiliary materials (quartz powder), 19.5 parts of inorganic filler (slag), 90 parts of solid waste aggregate (steel slag particles), 2.6 parts of fibers (basalt fibers), 0.8 part of water reducer (polycarboxylate water reducer), 0.8 part of water repellent (octyl triethoxysilane) and water to obtain carbon mineralized inorganic artificial stone slurry, wherein the water content of the carbon mineralized inorganic artificial stone slurry is kept to be 15%wt;

S2, scattering the carbon mineralized inorganic artificial stone slurry, distributing, conveying to a press, and vibrating and pressing the mixed material in a vacuum state to obtain a carbon mineralized inorganic artificial stone blank fixed by a die; the vacuum degree is-0.09 MPa, and the pressure head pressure is 2MPa.

S3, conveying the carbon mineralized inorganic artificial stone blank with the mould into a steam curing box for curing, wherein the curing temperature is 70 ℃, and the curing time is 6 hours.

S4, after curing, sending the mixture into a mineralization reaction kettle for reaction, replacing air with carbon dioxide-containing gas, pressurizing to 1MPa, heating to 70 ℃, and carrying out heat preservation reaction for 2 hours;

And S5, after the reaction is finished, demolding, drying, fixing the thickness, grinding, polishing and protecting to obtain the carbon mineralized inorganic artificial stone.

In this example, the mass ratio of the solid waste powder (steel slag) to the phenol compound (resorcinol) was 70:20=1:0.29, and the mass ratio of resorcinol to the reinforcing agent (polyacrylic acid) was 20:18=1:0.9.

Example 4

Example 4 is substantially the same as example 1, the main difference being that in the process of preparing the modified powder in step S1, the mass of the added solid waste powder and the phenol compound is different, specifically 57 parts of the added solid waste powder (steel slag), 3 parts of the phenol compound (resorcinol) and 6.5 parts of the reinforcing agent (polyacrylic acid).

In this example, the mass ratio of the solid waste powder (steel slag) to the phenol compound (resorcinol) was 57:3=1:0.05.

Example 5

Example 5 is substantially the same as example 1, the main difference being that in the process of preparing the modified powder in step S1, the mass of the added solid waste powder and the phenol compound is different, specifically 43 parts of the added solid waste powder (steel slag), 17 parts of the phenol compound (resorcinol) and 6.5 parts of the reinforcing agent (polyacrylic acid).

In this example, the mass ratio of steel slag to resorcinol was 43:17=1:0.4.

Example 6

Example 6 is substantially the same as example 1, the main difference being that in the process of preparing the modified powder in step S1, the mass of the phenol compound and the reinforcing agent are different, specifically, the added phenol compound (resorcinol) is 14 parts, the reinforcing agent (polyacrylic acid) is 2.5 parts, and the solid waste powder (steel slag) is still 50 parts.

In this example, the mass ratio of the phenolic compound (resorcinol) and the reinforcing agent (polyacrylic acid) was 14:2.5=1:0.18.

Example 7

The main difference between the modified powder prepared in step S1 and example 7 is that the mass of the added phenolic compound (resorcinol) and the mass of the reinforcing agent are different, specifically, 8 parts of the added phenolic compound (resorcinol), 8.5 parts of the reinforcing agent (polyacrylic acid) and 50 parts of the solid waste powder (steel slag).

In this example, the mass ratio of the phenol compound (resorcinol) and the reinforcing agent (polyacrylic acid) was 8:8.5=1:1.06.

Comparative example 1

Comparative example 1 is substantially the same as example 1, except that in step S1, step S11 is not performed, and in step S12, solid waste powder (steel slag) subjected to wet milling treatment is directly placed in a mineralization reaction vessel. Namely, only the solid waste powder is mineralized, and phenol compounds and reinforcing agents are not added to modify the solid waste powder.

Comparative example 2

Comparative example 2 is substantially the same as example 1, with the main difference that in step S11: 50 parts of 200-mesh solid waste powder (steel slag) subjected to wet grinding treatment is taken, 16.5 parts of reinforcing agent (polyacrylic acid) is added, uniformly mixed, and stirred for 8min, so that a mixed material is obtained. That is, in the preparation of the modified powder, only 16.5 parts of the reinforcing agent (polyacrylic acid) was added, and no phenol compound (resorcinol) was added.

Comparative example 3

Comparative example 3 is substantially the same as example 1, with the main difference that in step S11: 50 parts of 200-mesh solid waste powder (steel slag) subjected to wet grinding treatment is taken, 16.5 parts of phenol compounds (resorcinol) are added, uniformly mixed, and stirred for 8min, so that a mixed material is obtained. That is, in the preparation of the modified powder, only 16.5 parts of the phenol compound (resorcinol) was added, and no reinforcing agent (polyacrylic acid) was added.

Comparative example 4

Comparative example 4 is substantially the same as example 1, the main difference being that resorcinol, polyacrylic acid are directly added to the carbon mineralized inorganic artificial stone slurry in step S1. The method comprises the following specific steps:

S1, preparing carbon mineralized inorganic artificial stone slurry

S11, weighing 50 parts of solid waste powder (steel slag) of 200 meshes subjected to wet grinding treatment, putting the solid waste powder (steel slag) into a mineralization reaction kettle, replacing air with carbon dioxide-containing gas with the carbon dioxide concentration of 90%, pressurizing to 0.1MPa, heating to 90 ℃, carrying out heat preservation reaction for 4 hours, and grinding to 300 meshes to obtain mineralized solid waste powder (steel slag);

S12, uniformly mixing 27.1 parts of mineralized solid waste powder (steel slag), 5.4 parts of phenol compounds (resorcinol), 3.5 parts of reinforcing agents (polyacrylic acid), 10.8 parts of auxiliary materials (quartz powder), 13.6 parts of inorganic fillers (slag), 63 parts of solid waste aggregate (steel slag particles), 1.8 parts of fibers (basalt fibers), 0.5 part of water reducer (polycarboxylate water reducer), 0.5 part of water repellent (octyl triethoxysilane) and water to obtain carbon mineralized inorganic artificial stone slurry, wherein the water content of the carbon mineralized inorganic artificial stone slurry is kept to be 12%wt.

Comparative example 5

Comparative example 5 is substantially the same as example 1, except that in step S1, no auxiliary material (quartz powder) was added, and the part of the inorganic filler (slag) added was 24.4 parts.

Experimental examples

The inorganic artificial large plates prepared in examples 1 to 7 and comparative examples 1 to 5 were tested for flexural strength, compressive strength, water absorption and gloss, and the test results are shown in table 1. Wherein:

The carbon mineralized inorganic artificial stones obtained in examples 1 to 7 and comparative examples 1 to 5 were tested for flexural strength and compressive strength with reference to JC/T2604-2021 stone-like concrete panels and tiles.

The carbon mineralized inorganic artificial stones obtained in examples 1 to 7 and comparative examples 1 to 5 were subjected to water absorption test with reference to GB/T4111-2013 method for concrete block and brick test.

The carbon-mineralized inorganic artificial stones obtained in examples 1 to 7 and comparative examples 1 to 5 were subjected to gloss testing with reference to GB/T13891-2008 "method for measuring specular gloss of building finishing materials".

The carbon fixation rate is the concentration difference of carbon dioxide in the mineralization reaction kettle before and after the mineralization reaction.

Table 1:

in examples 1 to 3, the types and the amounts of the raw materials are limited, and the preparation process is adjusted, so that the prepared carbon mineralized inorganic artificial stone has high mechanical strength, good impermeability, luster, bending strength of more than 25.7MPa, compressive strength of more than 157.9MPa, carbon fixation rate of more than 26.0%, water absorption rate of less than 2.4% and glossiness of more than 58 degrees.

Compared with the embodiment 1, the embodiment 4 has the advantages that the resorcinol consumption is small, the benzene ring content on the surface of the solid waste powder steel slag is possibly reduced, the agglomeration phenomenon of the solid waste powder steel slag is easy to occur, the dispersion of the solid waste powder steel slag in the carbon mineralized inorganic artificial stone is uneven, the internal structure of a product is influenced, and the mechanical property and the glossiness are reduced; the consumption of resorcinol is reduced, and the absorption of carbon dioxide is reduced, but the reduction of the overall carbon fixation rate is not obvious due to the increase of the content of steel slag; in addition, the generated substances capable of forming a complex with polyacrylic acid are reduced, holes and gaps of steel slag cannot be effectively filled, the strength and the hydrophobicity of the carbon mineralized inorganic artificial stone slurry are also reduced, and the strength of the product is poor and the water absorption rate is high.

In example 5, compared with example 1, resorcinol is more in example 5, the uniform dispersibility of the solid waste powder slag and the impermeability of the carbon mineralized inorganic artificial stone are improved, but from the data, the participation of excessive resorcinol does not contribute to the improvement of the performance of the carbon mineralized inorganic artificial stone, but the strength data is slightly reduced, probably because the excessive resorcinol cannot further play the role of filling holes and gaps, but the content of steel slag in the modified powder is reduced, although the resorcinol can absorb more carbon dioxide when being increased, the content of steel slag is reduced, and the complex coated on the outer layer of the steel slag is more, so that the contact between carbon dioxide and the steel slag is influenced, and the overall carbon fixation rate is reduced. It can be seen that the mass ratio of steel slag to resorcinol is preferably 1 (0.1-0.3) in combination with the test data of examples 1-5.

The reason why the properties of the products were lowered in example 6 except for the carbon fixation rate in comparison with example 1 may be that: although resorcinol is helpful for absorbing more carbon dioxide to generate products, the carbon fixation rate is further improved, the limited polyacrylic acid reduces the amount of an integral complex formed between the resorcinol and the products, the filling rate of pores and cracks on the surface of the solid waste powder steel slag is reduced, and the compactness and the impermeability of the products are affected; meanwhile, too little polyacrylic acid can not provide good bonding force for the system, and the compactness of the carbon mineralized inorganic artificial stone system is reduced, so that various performances of the carbon mineralized inorganic artificial stone system are reduced.

Example 7 has reduced performance compared to example 1, probably due to the following: the amount of substances generated by resorcinol in cooperation with alkali metal salt and carbon dioxide on the surface of the solid waste powder is reduced, and although enough polyacrylic acid forms a complex with substances generated by resorcinol to fill pores and cracks of the solid waste powder steel slag, the amount of the complex is reduced due to the reduced amount of substances generated by resorcinol, so that the compactness of the product is deteriorated. Thus, in combination with the test data of examples 1-3, 6, 7, the mass ratio of resorcinol to polyacrylic acid is preferably 1: (0.3-0.9).

The reason for the reduced properties of the products compared to example 1 may be: in comparative example 1, on the one hand, the lack of resorcinol and polyacrylic acid can not absorb carbon dioxide and can not generate complex, a large number of pores and cracks still exist on the solid waste powder steel slag, the internal structure of the product is not effectively optimized, and the compactness is poor; on the other hand, the lack of polyacrylic acid can not provide bonding strength for each component of the system, and the internal structure of the carbon mineralized inorganic artificial stone is also deteriorated, and the compactness is reduced, so that each performance of the carbon mineralized inorganic artificial stone is reduced. In addition, the amount of carbon dioxide consumed was also relatively reduced as compared with example 1.

Compared with the comparative example 2 and the example 1, in the comparative example 2, resorcinol is not used for modifying the solid waste powder steel slag, benzene rings are not introduced into the surface of the modified steel slag, the agglomeration degree of powder is high, the mechanical strength and the impermeability are also poor, the mechanical property and the water absorption rate of the carbon mineralized inorganic artificial stone are affected, carbon dioxide cannot be absorbed, a complex cannot be formed by being matched with polyacrylic acid to fill holes and gaps in the steel slag, the compactness of the solid waste powder steel slag is reduced, and various properties of the carbon mineralized inorganic artificial stone are obviously reduced.

Comparative example 3 compared with example 1, in comparative example 3, the modification of steel slag without polyacrylic acid may result in: on one hand, complex can not be further formed with substances generated by resorcinol so as to effectively fill pores and cracks on the surface of the solid waste powder steel slag, and the compactness of the product is obviously reduced; on the other hand, the bonding strength among the components of the system is reduced, the internal structure of the carbon mineralized inorganic artificial stone is deteriorated, and the compactness is further reduced, so that the mechanical strength, the permeability resistance and the glossiness of the product are all reduced.

The properties of the product were significantly reduced compared to example 1 for comparative example 4, probably due to: in comparative example 4, resorcinol and polyacrylic acid are directly added into the slurry of the carbon mineralized inorganic artificial stone, the process can not activate phenolic hydroxyl ortho carbon in the phenolic compound, carbon dioxide is not present, further nucleophilic addition reaction between the activated compound and carbon dioxide can not be caused, a complex can not be generated with polyacrylic acid finally, the pore structure of the solid waste powder steel slag can not be optimized, the internal structure of the blank of the carbon mineralized inorganic artificial stone is not obviously adjusted, and the mechanical property of the carbon mineralized inorganic artificial stone is not obviously improved.

Comparative example 5 in comparison with example 1, in comparative example 5, the addition amount of the auxiliary material was changed to that of the inorganic filler. Under the condition that no auxiliary materials are added, the glossiness of the carbon mineralized inorganic artificial stone is obviously deteriorated, and the compressive strength and the flexural strength are slightly reduced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. A carbon mineralized inorganic artificial stone, characterized in that the preparation raw materials comprise, by mass: 15-70 parts of modified powder, 3-25 parts of auxiliary materials, 5-28 parts of inorganic filler, 20-120 parts of solid waste aggregate, 1-7 parts of fiber, 0.2-2.0 parts of water repellent and 0.2-1.5 parts of water reducer;

the preparation raw materials of the modified powder comprise solid waste powder, phenol compounds and reinforcing agents;

The mass ratio of the solid waste powder to the phenol compound is 1 (0.05-0.5);

the mass ratio of the phenol compound to the reinforcing agent is 1 (0.1-1.2).

2. The carbon-mineralized inorganic artificial stone according to claim 1, wherein the mass ratio of the solid waste powder to the phenol compound is 1 (0.1-0.3); the mass ratio of the phenol compound to the reinforcing agent is 1 (0.3-0.9).

3. The carbon-mineralized inorganic artificial stone according to claim 1, characterized in that the preparation raw materials of the modified powder include, by mass: 30-70 parts of solid waste powder, 3-20 parts of phenol compounds and 1-18 parts of reinforcing agents.

4. The inorganic artificial stone according to claim 1, wherein the phenol compound is at least one of resorcinol, m-aminophenol, 4-methylcatechol, 4-isopropylphenol, 2-sec-butylphenol; the reinforcing agent is at least one of polyacrylic acid and vinyl chloride-vinyl acetate copolymer.

5. The carbon-mineralized inorganic artificial stone according to claim 1, characterized in that the production raw materials include, by mass: 20-51 parts of modified powder, 6-16 parts of auxiliary materials, 7-20 parts of inorganic filler, 35-90 parts of solid waste aggregate, 2-5 parts of fiber, 0.3-0.8 part of water repellent and 0.3-0.8 part of water reducer;

the average particle size of the auxiliary materials is 150-400 meshes;

the average particle size of the inorganic filler is 50-300 meshes;

The average grain diameter of the solid waste aggregate is 0.01-8mm;

the average diameter of the fiber is 10-20 mu m, and the length is 8-19mm.

6. The carbon-mineralized inorganic artificial stone according to claim 1, wherein,

The auxiliary materials are selected from any one or two of quartz powder and granite;

The inorganic filler is selected from any one or more of slag, fly ash and fine tailings;

The solid waste aggregate is selected from any one or more of steel slag particles, magnesium slag particles, saw mud, coarse tailings and waste concrete particles;

The fiber is selected from any one or more of basalt fiber, polypropylene fiber and glass fiber;

The water repellent is selected from any one or more of octyl triethoxysilane, calcium stearate and methyl calcium silicate;

the water reducer is selected from any one or more of polycarboxylate water reducer and naphthalene water reducer;

the average particle size of the auxiliary materials is 200-300 meshes;

The average particle size of the inorganic filler is 60-240 meshes;

the average grain diameter of the solid waste aggregate is 0.01-5mm.

7. The carbon-mineralized inorganic artificial stone according to claim 1, wherein,

The preparation method of the modified powder comprises the following steps:

(1) Taking solid waste powder, sequentially adding a phenol compound and an enhancer, and uniformly stirring to obtain a mixed material;

(2) Placing the mixed materials into a mineralization reaction kettle, replacing air with carbon dioxide-containing gas, pressurizing to 0.1-1MPa, heating to 60-100 ℃, carrying out heat preservation reaction for 1-8h, and grinding the product after the reaction is finished to obtain modified powder;

The mass concentration of carbon dioxide in the carbon dioxide-containing gas is 8-100%;

the solid waste aggregate is selected from any one or more of steel slag particles and magnesium slag particles;

The fiber is selected from any one or more of basalt fiber and polypropylene fiber;

the water repellent is selected from one or more of octyl triethoxysilane and calcium stearate.

8. The carbon-mineralized inorganic artificial stone according to claim 7,

The solid waste raw materials used for preparing the solid waste powder are at least one of steel slag, magnesium slag, calcium silicate slag, blast furnace slag, coal gangue, carbide slag, alkaline slag, zero slag and thiourea slag;

the solid waste powder is obtained by wet grinding the solid waste raw material;

The average particle size of the solid waste powder is 100-300 meshes;

The mass concentration of carbon dioxide in the carbon dioxide-containing gas is 50-100%.

9. A method for preparing a carbon-mineralized inorganic artificial stone according to any one of claims 1 to 8, comprising the steps of:

s1, uniformly mixing modified powder, auxiliary materials, solid waste aggregate, fibers, a water reducing agent, a water repellent and water to obtain carbon mineralized inorganic artificial stone slurry, and keeping the water content of the carbon mineralized inorganic artificial stone slurry to be 8-15wt%;

s2, scattering the carbon mineralized inorganic artificial stone slurry, distributing, conveying to a press, and vibrating and pressing the mixed material in a vacuum state to obtain a carbon mineralized inorganic artificial stone blank fixed by a die;

s3, conveying the carbon mineralized inorganic artificial stone blank with the mould into a steam curing box for curing;

s4, after curing, sending the mixture into a mineralization reaction kettle for reaction, and after replacing air with gas containing carbon dioxide, carrying out mineralization reaction;

And S5, after the reaction is finished, demolding, drying, fixing the thickness, grinding, polishing and protecting to obtain the carbon mineralized inorganic artificial stone.

10. The method for producing a carbon-mineralized inorganic artificial stone according to claim 9,

In the step S2, the vacuum degree of vibration pressing is-0.09 to-0.1 MPa, and the pressure head pressure is 0.1 to 5MPa;

in the step S3, the curing temperature is 40-100 ℃ and the curing time is 2-10 h;

In the step S4, the mineralization reaction pressure is 0.1-1MPa, the temperature is 60-100 ℃, and the reaction time is 1-8h.