CN107188766A - A kind of coal ash for manufacturing for silicon composite fertilizer method - Google Patents
A kind of coal ash for manufacturing for silicon composite fertilizer method Download PDFInfo
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- CN107188766A CN107188766A CN201710620338.0A CN201710620338A CN107188766A CN 107188766 A CN107188766 A CN 107188766A CN 201710620338 A CN201710620338 A CN 201710620338A CN 107188766 A CN107188766 A CN 107188766A
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- fertilizer
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- filter residue
- flyash
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of method of coal ash for manufacturing for silicon composite fertilizer, comprise the following steps：First by flyash grinding to 150~200 mesh, after fully being reacted with watery hydrochloric acid, siliceous filter residue is filtrated to get, while filtrate evaporative crystallization to be obtained to the solid mixture of chloride containing calcium, chlorination magnesium crystal.Siliceous filter residue and sodium hydroxide solution reaction are obtained into liquid mixture containing sodium metasilicate again.The mixing granulations such as sodium metasilicate liquid mixture and humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, bentonite and trace-element fertilizer will finally be contained, silicon composite fertilizer is produced.Determination of Soluble Silicon is higher in silicon composite fertilizer produced by the present invention, makes full use of the element in flyash, nutrient more fully, with improving crop yield, the advantages of improveing quality, improved soil.
Description
Technical field
The present invention relates to fertilizer processing technique field, and in particular to a kind of coal ash for manufacturing for silicon composite fertilizer method.
Background technology
Composite fertilizer is the general name of the fertilizer containing two or more element in nitrogen, phosphorus, three kinds of nutrients of potassium.It is multiple
Hefei has the advantages that nutrient content is high, accessory ingredient is few and physical behavior is good, for balance fertilizing, improves utilization rate of fertilizer, promotees
Entering the stable high yield of crop has highly important effect.Silicon is the fourth-largest element of the production estimation after nitrogen, phosphorus, potassium.
At present, while a great number of elements such as nitrogen, phosphorus, potassium are applied to crops, also moderate-element silicon is applied to the fertilising of crops
In, the comprehensive fertilizer of nutrient is provided to crops, so as to reach efficient, high yield, high-quality purpose.But in the practice of Applying silicon fertilizer
In, it there is available silicon content low, it is impossible to fully absorbed by crops, cause the phenomenon that siliceous fertilizer consumption is big but fertilizer efficiency is poor.
Preparing the method for siliceous fertilizer has a variety of, wherein being that silicon is originated during current siliceous fertilizer is processed using various industrial solid castoffs
Main path.Fly ash in electric power plant is high because of total silicone content, can reach 30%~40%, as preparing the good raw material of siliceous fertilizer.But
Determination of Soluble Silicon is low in flyash, only accounts for 1%~2%.Therefore, efficient silicon composite fertilizer is prepared, need to be improved in flyash
The content of soluble silicon.
In addition, in growing process, required element is denitrogenated, outside phosphorus, potassium, silicon, calcium is also needed, the element such as magnesium.Mesh
The composite fertilizer of preceding in the market is generally only comprising essential elements such as N, P, K needed for crop, and crop is micro- necessary to growth period
Secondary element is but ignored for a long time, and effect of the trace element in the growth and development process of crop is essential.
It is that raw material preparation is compound using flyash that the A of Publication No. CN 102603407 Chinese patent application, which is related to a kind of,
The method of fertilizer, carries out fermentation mixing using raw material components such as flyash, a great number of elements, trace elements and adds receiving for flyash
Rice material prepares composite fertilizer, and its raw material includes urea 15-19%, MAP 2-4%, potassium sulfate 4-6%, potassium dihydrogen phosphate
4-7%, a diameter of 10-20nm of granule nano flyash 15-25%, humic acid 10-15%, heteroauxin 3-5%, water 5-
10%, chitosan 1-5%, borax 3-7%, zinc chloride 0.5-1%, sodium molybdate 0.05-0.3%, manganese sulfate 0.05-0.1%, ten
Dialkyl benzene sulfonic acids sodium 0.05-0.3%, ferrous sulfate 0.8-2%, magnesium sulfate 0.03-0.8%, copper sulphate 0.01-0.05%,
Dimethyl sulfoxide (DMSO) 0.2-2%；Preparation method, which includes mixing raw material, to be put into reactor, is dissolved, is stirred at 100-120 DEG C with water
Mix hybrid reaction 2 hours；After the completion of technique to be mixed, with 200 mesh screen solution, remove residue, add the nanometer fine coal
Ash, is uniformly mixing to obtain composite fertilizer.It can not make the compositions such as silicon therein, calcium, magnesium obtain abundant profit for the processing of flyash
With.
The A of Publication No. CN 103724097 Chinese patent application is related to a kind of Nanoparticle compound fertilizer and its preparation
Method, its component is in terms of weight fraction, including 50-80 parts of flyash, 10-20 parts of chemical fertilizer, 5-8 parts of sodium carbonate, 1-2 parts cohere
Agent；Preparation method includes grinding after weighing flyash and sodium carbonate, and stirring adds in reactor and is aged and crystallizes；Will ageing
Flyash and sodium carbonate after crystallization, which are filtered and washed, obtains flyash crystal；Flyash is obtained after being dried to flyash crystal
Powder；Then add after adhesive and/or water and granulate, wrapped up with the disconnected spraying of spray gun, then dry.Its use master for flyash
If as fertilizer slow release carrier, and the fertilizer element contained in itself for flyash applies not enough.
Therefore, also need to improve current compound fertilizer in this area, to improve comprehensive fertilizer efficiency, while effectively utilizing
Flyash.
The content of the invention
It is an object of the invention to provide a kind of method of coal ash for manufacturing for silicon composite fertilizer, this method can make full use of powder
The fertilizer element that coal ash contains, available silicon content in itself is high, while being easy to add other fertilizer elements, nutrient comprehensively, makes synthesis
Fertilizer efficiency is improved.
To achieve the above object, the present invention provides a kind of method of coal ash for manufacturing for silicon composite fertilizer, and methods described is included such as
Lower step：
(1) fly ash in electric power plant is handled to 150~200 mesh through flour mill；
(2) flyash after crushing is fully reacted with watery hydrochloric acid, filters out siliceous filter residue, after this siliceous filter residue drying
It is standby；
(3) by the filtrate in step (2) at 100~150 DEG C evaporative crystallization, obtain chloride containing calcium, chlorination magnesium crystal
Solid mixture；
(4) the siliceous filter residue of drying of step (2) is fully reacted with sodium hydroxide solution, obtained containing sodium silicate liquid mixing
Thing；
(5) liquid mixture containing sodium metasilicate of step (4) is sprayed onto granulation on comminutor bed of material and prepares silicon composite fertilizer,
Material on bed of material includes humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, bentonite and trace-element fertilizer；Wherein, containing sodium silicate solution
Body mixture, humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, the percentage by weight of bentonite and trace-element fertilizer are respectively：5~
10%, 5~10%, 30~35%, 20~35%, 10~25%, 0.5~1%, 0.5~1%.
Further, liquid mixture containing sodium metasilicate, humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, bentonite and trace element fertilizer
The percentage by weight of material is respectively：6~8%, 6~8%, 32~35%, 28~35%, 15~25%, 0.5~1%, 0.5~
1%.
Further, liquid mixture containing sodium metasilicate, humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, bentonite and trace element fertilizer
The percentage by weight of material is respectively：6~8%, 6~8%, 32~35%, 28~30%, 18~20%, 0.8~1%, 0.8~
1%.
Further, the humic acid includes peat, lignite and/or weathered coal, and granularity is not more than 200 mesh.
Further, the nitrogenous fertilizer includes urea and/or ammonium chloride；The phosphate fertilizer includes MAP and/or calcium and magnesium phosphorus
Fertilizer；The potash fertilizer includes potassium chloride and/or potassium sulfate.
Further, trace-element fertilizer in step (5) is that chloride containing calcium, chlorination magnesium crystal in step (3) is consolidated
Body mixture.
Further, the trace-element fertilizer also includes in boron fertilizer, zinc fertilizer, manganese fertilizer, molydbenum fertilizer, copper fertilizer, iron fertilizer, cobalt fertilizer
It is one or more.
Further, the watery hydrochloric acid concentration in step (2) is 15%~20%, and the ratio of flyash and watery hydrochloric acid presses g/ml
It is calculated as 1:3~3.5.
Further, the concentration of sodium hydroxide solution is 20%~25% in step (4), dries siliceous filter residue and hydroxide
The ratio of sodium solution is calculated as 1 by g/ml:1~1.5, reaction is carried out at 60~80 DEG C.
Further, granulation particle diameter is 2-6mm in step (5).
The inventive method and the silicon composite fertilizer of preparation have the following advantages that：
The standby sodium silicate solution of coal ash for manufacturing is improved available silicon content, makes element silicon soluble in water, it is easy to plant
Root absorption.The mixed crystals such as obtained calcium chloride, magnesium chloride can be added in composite fertilizer as trace element, made in flyash
Element be fully used；The silicon composite fertilizer for coordinating humic acid, nitrogen, phosphorus, potassium element to be made, nutrient more fully, with carrying
High crop yield, the advantages of improveing quality of agricultural product, improved soil.
Brief description of the drawings
Fig. 1 is the process chart of the inventive method.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
With flour mill by fly ash in electric power plant grinding to 200 mesh, flyash and the watery hydrochloric acid that concentration is 20% after crushing are pressed
1:After 3 (g/ml) solid-liquid ratio is fully reacted, siliceous filter residue is filtrated to get, by this siliceous filter residue dry for standby.Obtain simultaneously
Filtrate 120 DEG C of evaporative crystallizations go out chloride containing calcium, chlorination magnesium crystal solid mixture it is standby.By standby siliceous filter residue with
Concentration is 25% sodium hydroxide solution, by 1:1.5 (g/ml) ratio, is reacted at 80 DEG C, obtains containing sodium silicate liquid
Mixture.
Take 50 kilograms of weathered coal, 300 kilograms of urea, 350 kilograms of MAP, 250 kilograms of potassium chloride, 5 kilograms of bentonite,
It is public by 50 in 10 kilograms of trace-element fertilizer (chloride containing calcium, 10 kilograms of the solid mixture of chlorination magnesium crystal) input comminutor
Jin liquid mixture containing sodium metasilicate is sprayed onto on above-mentioned bed of material by the fluid jetting head in comminutor, and granulation to particle diameter is 4mm,
Silicon composite fertilizer of the present invention is produced after drying, packaging.
Embodiment 2
With flour mill by fly ash in electric power plant grinding to 180 mesh, flyash and the watery hydrochloric acid that concentration is 15% after crushing are pressed
1:After 3.5 (g/ml) solid-liquid ratio is fully reacted, siliceous filter residue is filtrated to get, by this siliceous filter residue dry for standby.Simultaneously
To filtrate 130 DEG C of evaporative crystallizations go out chloride containing calcium, chlorination magnesium crystal solid mixture it is standby.By standby siliceous filter residue
With concentration be 20% sodium hydroxide solution, by 1:1.2 (g/ml) ratio, is reacted at 80 DEG C, obtains containing sodium silicate solution
Body mixture.
Take 60 kilograms of peat, 350 kilograms of urea, 300 kilograms of calcium magnesium phosphate, 200 kilograms of potassium sulfate, 10 kilograms of bentonite,
10 kilograms of trace-element fertilizer (chloride containing calcium, 5 kilograms of the solid mixture of chlorination magnesium crystal, boron fertilizer, zinc fertilizer, manganese fertilizer, iron fertilizer,
Totally 5 kilograms of five kinds of cobalt fertilizer) put into comminutor, 70 kilograms of liquid mixtures containing sodium metasilicate are passed through into the fluid jetting head in comminutor
It is sprayed onto on above-mentioned bed of material, granulation to particle diameter is 5mm, silicon composite fertilizer of the present invention is produced after drying, packaging.
Embodiment 3
With flour mill by fly ash in electric power plant grinding to 150 mesh, flyash and the watery hydrochloric acid that concentration is 18% after crushing are pressed
1:After 3.2 (g/ml) solid-liquid ratio is fully reacted, siliceous filter residue is filtrated to get, by this siliceous filter residue dry for standby.Simultaneously
To filtrate 150 DEG C of evaporative crystallizations go out chloride containing calcium, chlorination magnesium crystal solid mixture it is standby.By standby siliceous filter residue
With concentration be 22% sodium hydroxide solution, by 1:1.3 (g/ml) ratio, is reacted at 70 DEG C, obtains containing sodium silicate solution
Body mixture.
Take 80 kilograms of lignite, 320 kilograms of ammonium chloride, 280 kilograms of MAP, 250 kilograms of potassium sulfate, 5 kilograms of bentonite,
In 5 kilograms of trace-element fertilizer (chloride containing calcium, 5 kilograms of the solid mixture of chlorination magnesium crystal) input comminutor, by 60 kilograms
Liquid mixture containing sodium metasilicate is sprayed onto on above-mentioned bed of material by the fluid jetting head in comminutor, and granulation to particle diameter is 3mm, warp
Silicon composite fertilizer of the present invention is produced after dry, packaging.
Embodiment 4
With flour mill by fly ash in electric power plant grinding to 160 mesh, flyash and the watery hydrochloric acid that concentration is 16% after crushing are pressed
1:After 3 (g/ml) solid-liquid ratio is fully reacted, siliceous filter residue is filtrated to get, by this siliceous filter residue dry for standby.Obtain simultaneously
Filtrate 110 DEG C of evaporative crystallizations go out chloride containing calcium, chlorination magnesium crystal solid mixture it is standby.By standby siliceous filter residue with
Concentration is 22% sodium hydroxide solution, by 1:1.4 (g/ml) ratio, is reacted at 70 DEG C, obtains containing sodium silicate liquid
Mixture.
100 kilograms of weathered coal is taken, 300 kilograms of urea, 260 kilograms of calcium magnesium phosphate, 230 kilograms of potassium chloride, bentonite 5 is public
In jin, 5 kilograms of trace-element fertilizer (chloride containing calcium, 5 kilograms of the solid mixture of chlorination magnesium crystal) input comminutor, by 100
Kilogram liquid mixture containing sodium metasilicate is sprayed onto on above-mentioned bed of material by the fluid jetting head in comminutor, and granulation to particle diameter is
2mm, silicon composite fertilizer of the present invention is produced after drying, packaging.
Embodiment 5
With flour mill by fly ash in electric power plant grinding to 200 mesh, flyash and the watery hydrochloric acid that concentration is 18% after crushing are pressed
1:After 3.5 (g/ml) solid-liquid ratio is fully reacted, siliceous filter residue is filtrated to get, by this siliceous filter residue dry for standby.Simultaneously
To filtrate 140 DEG C of evaporative crystallizations go out chloride containing calcium, chlorination magnesium crystal solid mixture it is standby.By standby siliceous filter residue
With concentration be 23% sodium hydroxide solution, by 1:1.2 (g/ml) ratio, is reacted at 80 DEG C, obtains containing sodium silicate solution
Body mixture.
80 kilograms of lignite is taken, 350 kilograms of ammonium chloride, 230 kilograms of MAP, 230 kilograms of potassium chloride, bentonite 10 is public
Jin, 10 kilograms of trace-element fertilizer (chloride containing calcium, 6 kilograms of the solid mixture of chlorination magnesium crystal, molydbenum fertilizer, copper fertilizer, iron fertilizer, cobalt
Four kinds totally 4 kilograms of fertilizer) put into comminutor, the fluid jetting head 90 kilograms of liquid mixtures containing sodium metasilicate passed through in comminutor sprays
It is spread across on above-mentioned bed of material, granulation to particle diameter is 6mm, silicon composite fertilizer of the present invention is produced after drying, packaging.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. a kind of coal ash for manufacturing is for the method for silicon composite fertilizer, it is characterised in that methods described comprises the following steps：
(1) fly ash in electric power plant is handled to 150~200 mesh through flour mill；
(2) flyash after crushing is fully reacted with watery hydrochloric acid, filters out siliceous filter residue, this siliceous filter residue is dried into standby
With；
(3) by the filtrate in step (2) at 100~150 DEG C evaporative crystallization, obtain chloride containing calcium, the solid of chlorination magnesium crystal
Mixture；
(4) the siliceous filter residue of drying of step (2) is fully reacted with sodium hydroxide solution, obtains liquid mixture containing sodium metasilicate；
(5) liquid mixture containing sodium metasilicate of step (4) is sprayed onto granulation on comminutor bed of material and prepares silicon composite fertilizer, material
Material on bed includes humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, bentonite and trace-element fertilizer；Wherein, it is mixed containing sodium silicate liquid
Compound, humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, the percentage by weight of bentonite and trace-element fertilizer are respectively：5~10%, 5~
10%, 30~35%, 20~35%, 10~25%, 0.5~1%, 0.5~1%.
2. according to the method described in claim 1, it is characterised in that liquid mixture containing sodium metasilicate in step (5), humic acid,
Nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, the percentage by weight of bentonite and trace-element fertilizer are respectively：6~8%, 6~8%, 32~35%,
28~35%, 15~25%, 0.5~1%, 0.5~1%.
3. according to the method described in claim 1, it is characterised in that liquid mixture containing sodium metasilicate in step (5), humic acid,
Nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, the percentage by weight of bentonite and trace-element fertilizer are respectively：6~8%, 6~8%, 32~35%,
28~30%, 18~20%, 0.8~1%, 0.8~1%.
4. the method according to any one of claim 1-3, it is characterised in that the humic acid include peat, lignite and/
Or weathered coal, granularity is not more than 200 mesh.
5. the method according to any one of claim 1-3, it is characterised in that the nitrogenous fertilizer includes urea and/or chlorination
Ammonium；The phosphate fertilizer includes MAP and/or calcium magnesium phosphate；The potash fertilizer includes potassium chloride and/or potassium sulfate.
6. the method according to any one of claim 1-3, it is characterised in that the trace-element fertilizer in step (5) is
Chloride containing calcium, the solid mixture of chlorination magnesium crystal in step (3).
7. method according to claim 6, it is characterised in that the trace-element fertilizer also includes boron fertilizer, zinc fertilizer, manganese
One or more in fertilizer, molydbenum fertilizer, copper fertilizer, iron fertilizer, cobalt fertilizer.
8. the method according to any one of claim 1-3, it is characterised in that the watery hydrochloric acid concentration in step (2) is
15%~20%, the ratio of flyash and watery hydrochloric acid is calculated as 1 by g/ml:3~3.5.
9. the method according to any one of claim 1-3, it is characterised in that sodium hydroxide solution is dense in step (4)
Spend for 20%~25%, the ratio for drying siliceous filter residue and sodium hydroxide solution is calculated as 1 by g/ml:1~1.5, react 60
Carried out at~80 DEG C.
10. the method according to any one of claim 1-3, it is characterised in that granulation particle diameter is 2-6mm in step (5).
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935786A (en) * | 2017-12-29 | 2018-04-20 | 广东拉多美化肥有限公司 | A kind of preparation method of humic acid Si composite fertilizer |
| CN108424206A (en) * | 2018-06-04 | 2018-08-21 | 国家能源投资集团有限责任公司 | Flyash acid system residue of aluminum-extracted prepares the method containing silicon composite fertilizer and the utilization method containing silicon composite fertilizer and flyash |
| CN109369286A (en) * | 2018-09-18 | 2019-02-22 | 华南理工大学 | It is a kind of using flyash produce in microelement acidic soil conditioner method and product |
| CN110862283A (en) * | 2018-08-08 | 2020-03-06 | 友达晶材股份有限公司 | Fertilizer and method for producing fertilizer containing silicate aqueous solution |
| CN111943730A (en) * | 2020-07-14 | 2020-11-17 | 卢建军 | Preparation process of high-doped fly ash potassium-rich silicon fertilizer |
| CN112851440A (en) * | 2019-11-12 | 2021-05-28 | 中国科学院过程工程研究所 | Preparation method of environment-friendly organic-inorganic compound fertilizer |
| CN113045341A (en) * | 2019-12-26 | 2021-06-29 | 国家能源投资集团有限责任公司 | Method for preparing alkali-free silicon fertilizer from silicon-containing acid treatment solution and alkali-free silicon fertilizer |
| WO2021203923A1 (en) * | 2020-04-09 | 2021-10-14 | 国家能源投资集团有限责任公司 | Liquid silicon-calcium fertilizer, preparation method therefor, and use thereof |
| CN113800989A (en) * | 2021-10-13 | 2021-12-17 | 郝振昌 | Compound blended silicon fertilizer and preparation method thereof |
| CN114195589A (en) * | 2021-12-28 | 2022-03-18 | 安徽省司尔特肥业股份有限公司 | Power plant dry ash-based silicon-rich compound fertilizer special for rice and preparation method thereof |
| CN114656298A (en) * | 2022-03-11 | 2022-06-24 | 内蒙古赫缘生物科技有限公司 | Silicon element rice slow release fertilizer and preparation method thereof |
| CN115849980A (en) * | 2021-09-24 | 2023-03-28 | 淮南师范学院 | Slow release fertilizer and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935786A (en) * | 2017-12-29 | 2018-04-20 | 广东拉多美化肥有限公司 | A kind of preparation method of humic acid Si composite fertilizer |
| CN108424206A (en) * | 2018-06-04 | 2018-08-21 | 国家能源投资集团有限责任公司 | Flyash acid system residue of aluminum-extracted prepares the method containing silicon composite fertilizer and the utilization method containing silicon composite fertilizer and flyash |
| CN110862283A (en) * | 2018-08-08 | 2020-03-06 | 友达晶材股份有限公司 | Fertilizer and method for producing fertilizer containing silicate aqueous solution |
| CN109369286A (en) * | 2018-09-18 | 2019-02-22 | 华南理工大学 | It is a kind of using flyash produce in microelement acidic soil conditioner method and product |
| CN109369286B (en) * | 2018-09-18 | 2021-09-21 | 华南理工大学 | Method for producing medium trace element acid soil conditioner by using fly ash and product |
| CN112851440A (en) * | 2019-11-12 | 2021-05-28 | 中国科学院过程工程研究所 | Preparation method of environment-friendly organic-inorganic compound fertilizer |
| CN113045341A (en) * | 2019-12-26 | 2021-06-29 | 国家能源投资集团有限责任公司 | Method for preparing alkali-free silicon fertilizer from silicon-containing acid treatment solution and alkali-free silicon fertilizer |
| WO2021203923A1 (en) * | 2020-04-09 | 2021-10-14 | 国家能源投资集团有限责任公司 | Liquid silicon-calcium fertilizer, preparation method therefor, and use thereof |
| CN111943730A (en) * | 2020-07-14 | 2020-11-17 | 卢建军 | Preparation process of high-doped fly ash potassium-rich silicon fertilizer |
| CN115849980A (en) * | 2021-09-24 | 2023-03-28 | 淮南师范学院 | Slow release fertilizer and preparation method thereof |
| CN113800989A (en) * | 2021-10-13 | 2021-12-17 | 郝振昌 | Compound blended silicon fertilizer and preparation method thereof |
| CN114195589A (en) * | 2021-12-28 | 2022-03-18 | 安徽省司尔特肥业股份有限公司 | Power plant dry ash-based silicon-rich compound fertilizer special for rice and preparation method thereof |
| CN114656298A (en) * | 2022-03-11 | 2022-06-24 | 内蒙古赫缘生物科技有限公司 | Silicon element rice slow release fertilizer and preparation method thereof |
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