CN114031378A - Anti-scouring ladle bottom castable and production method thereof - Google Patents
Anti-scouring ladle bottom castable and production method thereof Download PDFInfo
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- CN114031378A CN114031378A CN202111368571.7A CN202111368571A CN114031378A CN 114031378 A CN114031378 A CN 114031378A CN 202111368571 A CN202111368571 A CN 202111368571A CN 114031378 A CN114031378 A CN 114031378A
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- ladle bottom
- corundum
- scouring
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- 238000009991 scouring Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 69
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 239000008187 granular material Substances 0.000 claims abstract description 26
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 claims abstract description 22
- 230000000996 additive effect Effects 0.000 claims abstract description 22
- 239000010431 corundum Substances 0.000 claims abstract description 22
- 239000007767 bonding agent Substances 0.000 claims abstract description 20
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 15
- 239000011029 spinel Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims abstract description 7
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011777 magnesium Substances 0.000 claims abstract description 5
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 5
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims abstract description 4
- 239000002270 dispersing agent Substances 0.000 claims abstract description 4
- 150000007524 organic acids Chemical class 0.000 claims abstract description 4
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 9
- 239000002893 slag Substances 0.000 abstract description 8
- 230000035939 shock Effects 0.000 abstract description 6
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 230000007306 turnover Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 230000009172 bursting Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000004901 spalling Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- C04B35/71—Ceramic products containing macroscopic reinforcing agents
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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Abstract
The invention relates to an anti-scouring ladle bottom castable and a production method thereof, belonging to the technical field of refractory materials. And the anti-scouring ladle bottom castable comprises the following components: granule, powder, fused magnesia, bonding agent and additive. The granular material is formed by mixing alumina, corundum and corundum spinel reclaimed materials; the powder is corundum fine powder or micro powder, spinel fine powder or micro powder, alpha-Al2O3Mixing the micro powder; the binding agent is a mixture of calcium aluminate cement, magnesium gel and silica fume in any ratio; the additive is a polycarboxylic acid dispersant containingThe mixture of the organic acid and the fiber in any ratio. The ladle bottom working lining constructed by the ladle bottom casting material or the precast block provided by the invention has the characteristics of balanced performances, namely excellent anti-burst, anti-scouring, anti-slag erosion, anti-stripping and thermal shock performances, obvious effects on prolonging the service life of the lining and the turnover rate of a ladle, and high cost performance.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to an anti-scouring ladle bottom castable and a production method thereof.
Background
Along with the development of metallurgical technology, the use condition of the ladle is more and more rigorous, the service life of a working lining of the ladle is seriously influenced, particularly, the scouring recess of a ladle bottom impact area is serious during tapping, and the ladle condition is difficult to judge due to cold steel during hot repair, so that the use safety risk is increased. However, from the viewpoint of improving economic benefit and production efficiency, steel mills also require long service life of the ladle, and in order to solve the contradiction, the ladle bottom castable needs to have high-temperature rupture strength and slag resistance as high as possible so as to better resist the scouring and erosion of high-temperature molten steel and molten slag and prolong the service life. Some users use the prefabricated section to improve the scour resistance in the impact zone, and this requirement to the construction is higher, if handle not good, then there is the risk of wearing the steel pouring material and prefabricated section juncture, and the security is not like the whole pouring of package end, has also increased the cost, uses the less of prefabricated section at present.
Generally, the high-temperature breaking strength and the like are improved by reducing the water adding amount of the castable and increasing the micro powder amount to improve the compactness and sintering performance of the castable, but the anti-bursting performance of the castable during baking and the thermal shock stability during use are reduced, so that various factors are comprehensively considered in combination with the selection of a binding agent, and a better mixing ratio is sought. In addition, the types and the adding amounts of the micro powder and the additive have great influence on the water adding amount, the solidification time, the formation and the distribution of air holes, the anti-bursting performance, the high-temperature breaking strength, the linear change, the thermal shock stability, the anti-stripping performance, the slag resistance and other performances of the unshaped refractory material, and particularly directly influence the service performance of the ladle bottom castable.
The currently used ladle bottom castable is limited by a binding agent and the like, generally has less balanced performances, some ladle bottom materials have higher water adding amount and good explosion-proof performance, but has low high-temperature rupture strength, poor scouring resistance and easy peeling; some ladle bottom materials have low water addition amount, high-temperature rupture strength, good scour resistance and spalling resistance, but poor explosion-proof performance. The ladle bottom castable which has moderate water addition amount (less than 4.3 percent), high explosion resistance (more than 1000 ℃) and high-temperature breaking strength (1400 ℃ multiplied by 0.5h, more than 6.0MPa) and good anti-scouring and anti-stripping performance and the production method thereof are not reported in documents at present. The prior art is different from the present invention, does not have the characteristic of balanced performance of the bottom material of the present invention, and the person skilled in the art can not easily and obviously obtain the bottom material of the bag with balanced performance according to the existing technology.
Brown corundum is used in Chinese patent CN 105036773A; 0-0.074mm of fused magnesia-alumina spinel fine powder 5-20%, more than 70% of magnesia-rich spinel MgO, and more than 70% of alumina-rich spinel Al2O3More than 70 percent; 0-0.061mm 1-15% of magnesia powder, 0-0.045mm corundum micropowder or silicon micropowder 5-20%, 2-20% of alpha-type activated alumina, 2-15% of calcium aluminate cement, water reducing agent ADW, ADS, FS200.1-1.5%, and the physical and chemical indexes thereof do not particularly describe the high-temperature rupture strength and the bursting temperature.
The Chinese patent CN111517767A uses 0-1mm 5-10 parts of fused magnesia, 0.5-1.5 parts of zirconium composite silicon micropowder, 8mm of plate-shaped corundum critical particles, 2-5 parts of cement and 5-7 parts of water and each component by mass: 100, the high-temperature rupture strength and the burst temperature are not particularly described based on the physicochemical indexes.
55-65 parts by weight of waste RH insert tube castable used in Chinese patent CN110845248A, and the bonding agent is silicon micropowder.
The Chinese patent CN110451998A uses 15-25% of 8-35mm precast blocks, 40-50% of black aluminum sand, 2-5% of silicon powder, and the bonding agent is one or more of pure calcium aluminate cement, hydrated alumina and aluminum silicon gel powder, the water reducing agent is one or two mixtures of sodium tripolyphosphate and sodium hexametaphosphate, 5.2% of water is added, and the physicochemical indexes of the water reducing agent are known, and the high-temperature breaking strength and the bursting temperature are not particularly explained.
The Chinese patent CN107188550A uses 30-60 parts of sub-white corundum with the grain size of 3-5mm (the critical grain is 5mm), 1-2 parts of fused magnesia grain with the grain size of 1-3mm and 1-2 parts of fused magnesia fine powder with the grain size of 200 meshes，α-Al2O31-5 parts of micro powder, 0.5-5 parts of ceramic fiber (comprising aluminum oxide, zirconium oxide and lanthanum oxide), 1-1.5 parts of titanium oxide, 1-5 parts of chemical magnesium oxide and 3-6 parts of brine, and the physicochemical indexes of the micro powder, the high-temperature flexural strength and the bursting temperature are not particularly described.
Disclosure of Invention
The invention aims to provide an anti-scouring ladle bottom castable and a production method thereof, and a ladle bottom working lining constructed by using the castable or a precast block has the characteristic of balanced performances, namely, the ladle bottom working lining has excellent anti-bursting, anti-scouring, anti-slag erosion, anti-stripping and thermal shock performances, and has obvious effects of prolonging the service life of the lining and improving the turnover rate of a ladle, and obvious economic benefits.
The technical problems to be solved by the invention are as follows: the currently used ladle bottom castable is restricted by a bonding agent and the like, so that the balance of various properties is poor.
The purpose of the invention can be realized by the following technical scheme:
an anti-scouring ladle bottom castable comprises the following components in percentage by weight: 65-80% of granules, 7-45% of powder, 1-5% of fused magnesia, 2-7% of a bonding agent and 0.2-1.8% of an additive.
Further, the particle material is alumina, corundum spinel reclaimed material according to the mass ratio of 0-5: 5-14: 0-5 of the components.
Furthermore, the particle size of the alumina in the granules is 5-15 mm.
Further, the grain size of corundum in the granules is divided into five grades, namely 0-1mm, 1-3mm, 3-5mm, 5-8mm and 10-20mm, and the corundum is a five-grade (from small to large) granules according to the mass ratio of 2-4: 2-4: 1-3: 1-3: 0-4, mixing.
Furthermore, the grain size of the corundum spinel reclaimed material in the granules is 3-20 mm.
Further, the powder material is corundum fine powder or micro powder, spinel fine powder or micro powder, and alpha-Al2O3The micro powder is prepared from the following components in a mass ratio of 1-4: 1-4: 1-4, mixing.
Furthermore, the grain size of the corundum fine powder or micro powder in the powder is less than 3 mu m.
Furthermore, the particle size of the spinel powder fine powder or micropowder in the powder material is less than 3 μm.
Further, alpha-Al in the powder2O3The particle size of the micro powder is less than 2 mu m.
Furthermore, the fused magnesia is powder and/or granules, and the particle size of the fused magnesia is 0-1 mm.
Further, the binding agent is a mixture of calcium aluminate cement, magnesium gel and silica fume in any ratio.
Further, the additive is a mixture of a polycarboxylic acid dispersant, an organic acid and fibers in any ratio.
Furthermore, the fiber is one or a mixture of several of aluminum, silicon, magnesium, boron, steel fiber and organic fiber in any ratio.
The production method of the ladle bottom castable comprises the following steps:
step one, crushing and processing raw materials: crushing, processing and screening the raw materials to obtain treated granules, powder, fused magnesia, a bonding agent and an additive;
step two, mixing and grinding: mixing and grinding the bonding agent, the powder and the fused magnesia for 5-10min to obtain a first mixed material; and slowly mixing and grinding the granules and the additive for 15-25min, then adding the first mixed material, and mixing and grinding for 20-40min to obtain the anti-scouring ladle bottom castable.
Further, when the ladle bottom castable obtained by the invention is used, water is added into the obtained ladle bottom castable, and after stirring and homogenizing, the ladle bottom castable is cast and molded to obtain a ladle bottom castable sample, wherein the adding mass of the water is 3.8-4.3% of the mass of the ladle bottom castable.
Furthermore, the bursting temperature of the ladle bottom castable sample reaches over 1000 ℃, and the high-temperature rupture strength at 1400 ℃ for 0.5h reaches 10.2 MPa.
The invention has the beneficial effects that:
the ladle bottom castable provided by the invention is mainly suitable for cold-state pouring of the ladle bottom, and the product can effectively improve the erosion resistance of the ladle bottom impact area, thereby prolonging the integral service life of a ladle working lining and improving the on-line turnover rate;
the ladle bottom castable with moderate water addition amount (less than 4.3%), high explosion resistance (more than 1000 ℃) and high-temperature bending strength (1400 ℃ multiplied by 0.5h, more than 6.0MPa), and good scour resistance and spalling resistance is obtained by scientific compatibility of the particle material, the powder material, the fused magnesia, the bonding agent and the additive, wherein the particle material mainly comprises alumina, corundum and corundum spinel reclaimed materials, provides a matrix of the ladle bottom castable, and lays a foundation for various properties of the ladle bottom castable; the powder mainly plays roles of improving the compactness of a matrix, enhancing slag resistance and improving high-temperature rupture strength, and mainly comprises corundum fine powder or micro powder, spinel fine powder or micro powder and alpha-Al2O3Micro powder, and Al in the ladle bottom castable by being arranged between the micro powder and the granular material2O3The MgO content is proper, and the slag resistance is maximized; the binding agent is calcium aluminate cement, magnesium gel and silica fume, which mainly plays a role in improving the fluidity and the adhesiveness among the ladle bottom castable and improving the pouring performance of the ladle bottom castable; the additive is a mixture of a plurality of polycarboxylic acid dispersant, organic acid and fiber in any ratio, is scientifically compatible with the granules, the powder, the fused magnesia and the binding agent, and synergistically improves the explosion resistance, the high-temperature breaking strength, the scouring resistance and the spalling resistance of the ladle bottom castable;
in conclusion, the ladle bottom working lining constructed by the ladle bottom castable or the precast block provided by the invention has the characteristics of balanced performances, namely, excellent anti-burst, anti-scouring, anti-slag erosion, anti-stripping and thermal shock performances, and has obvious effects of prolonging the service life of the lining and improving the turnover rate of the ladle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An anti-scouring ladle bottom castable:
step one, preparing raw materials according to the mixture ratio of table 1, weighing the following components in percentage by weight: 65% of granules, 25% of powder, 4.5% of fused magnesia, 4% of a bonding agent and 1.5% of an additive;
step two, crushing and processing raw materials: crushing, processing and screening the raw materials to obtain treated granules, powder, fused magnesia, a bonding agent and an additive, wherein the treatment results of the raw materials meet the particle size requirements in table 1;
step three, mixing and grinding: mixing and grinding the bonding agent, the powder and the fused magnesia for 5min to obtain a first mixed material; and slowly mixing and grinding the granules and the additive for 15min, then adding the first mixed material, and mixing and grinding for 20min to obtain the anti-scouring ladle bottom castable.
TABLE 1
Example 2
An anti-scouring ladle bottom castable:
step one, preparing raw materials according to the mixture ratio of table 2, weighing the following components in percentage by weight: 70% of granules, 17.2% of powder, 5% of fused magnesia, 7% of a bonding agent and 1.8% of an additive;
step one, crushing and processing raw materials: crushing, processing and screening the raw materials to obtain treated granules, powder, fused magnesia, a bonding agent and an additive, wherein the treatment results of the raw materials meet the particle size requirements of table 2;
step two, mixing and grinding: mixing and grinding the bonding agent, the powder and the fused magnesia for 7min to obtain a first mixed material; and slowly mixing and grinding the granules and the additive for 20min, then adding the first mixed material, and mixing and grinding for 30min to obtain the anti-scouring ladle bottom castable.
TABLE 2
Example 3
An anti-scouring ladle bottom castable:
step one, preparing raw materials according to the mixture ratio of table 3, weighing the following components in percentage by weight: 80% of granules, 16.8% of powder, 1% of fused magnesia, 2% of a bonding agent and 0.2% of an additive;
step one, crushing and processing raw materials: crushing, processing and screening the raw materials to obtain treated granules, powder, fused magnesia, a bonding agent and an additive, wherein the treatment results of the raw materials meet the particle size requirements in table 3;
step two, mixing and grinding: mixing and grinding the bonding agent, the powder and the fused magnesia for 5-10min to obtain a first mixed material; and slowly mixing and grinding the granules and the additive for 15-25min, then adding the first mixed material, and mixing and grinding for 20-40min to obtain the anti-scouring ladle bottom castable.
TABLE 3
Comparative example 1
According to the preparation method of the embodiment 1 in CN105036773A, the casting material is added with water and cast to form a casting sample strip.
Comparative example 2
Test specimens were cast according to the preparation method of example 1 in CN111517767 a.
Comparative example 3
According to the preparation method of the scheme 1 in CN110845248A, the pouring material is added with water and poured to form a pouring sample strip.
Example 4
And (3) performance testing:
the casting materials obtained in examples 1 to 3 were poured into water to form a sample, and the amount of water added was 3%, 2% and 3.5% of the weight of the casting material, respectively, to obtain a sample bar for casting. The casting test specimens obtained in examples 1 to 3 and comparative examples 1 to 3 were identical in size, and the mold sizes were 40 mm. times.40 mm. times.160 mm, respectively.
Testing the physical and chemical indexes of the pouring sample, wherein the test structure is shown in table 4;
TABLE 4
As can be seen from the data in Table 4, the balance of the compressive strength, high temperature bending resistance, heating permanent line change and burst temperature of the casting samples obtained in examples 1 to 3 is better than that of the casting samples obtained in comparative examples 1 to 3, which shows that the ladle-to-ladle castable provided by the invention has excellent anti-burst, anti-scouring, anti-stripping and thermal shock properties.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. An anti-scouring ladle bottom castable which is characterized in that: comprises the following components in percentage by weight: 65-80% of granules, 7-45% of powder, 1-5% of fused magnesia, 2-7% of a bonding agent and 0.2-1.8% of an additive;
the particle material is alumina, corundum and corundum spinel reclaimed material according to the mass ratio of 0-5: 5-14: 0-5, mixing;
the powder is corundum fine powder or micro powder, spinel fine powder or micro powder, alpha-Al2O3The micro powder is prepared from the following components in a mass ratio of 1-4: 1-4: 1-4 mixing;
the binding agent is a mixture of calcium aluminate cement, magnesium gel and silica fume in any ratio;
the additive is a mixture of a polycarboxylic acid dispersant, an organic acid and fibers in any ratio.
2. The anti-scour ladle bottom castable according to claim 1, characterized in that: the particle size of the alumina in the granules is 5-15 mm.
3. The anti-scour ladle bottom castable according to claim 1, characterized in that: the grain size of corundum in the granules is divided into five grades, which are respectively 0-1mm, 1-3mm, 3-5mm, 5-8mm and 10-20 mm.
4. The anti-scour ladle bottom castable according to claim 1, characterized in that: the grain size of the corundum spinel reclaimed material in the granules is 3-20 mm.
5. The anti-scour ladle bottom castable according to claim 1, characterized in that: the grain size of the corundum fine powder or micro powder in the powder is less than 3 mu m.
6. The anti-scour ladle bottom castable according to claim 1, characterized in that: the particle size of the spinel powder fine powder or micro powder in the powder is less than 3 mu m.
7. The anti-scour ladle bottom castable according to claim 1, characterized in that: alpha-Al in powder2O3The particle size of the micro powder is less than 2 mu m.
8. The method for producing the anti-scouring ladle bottom castable according to claim 1, characterized in that: the method comprises the following steps:
step one, crushing and processing raw materials: crushing, processing and screening the raw materials to obtain treated granules, powder, fused magnesia, a bonding agent and an additive;
step two, mixing and grinding: mixing and grinding the bonding agent, the powder and the fused magnesia for 5-10min to obtain a first mixed material; and (3) mixing and grinding the particles and the additive for 15-25min, then adding the first mixed material, and mixing and grinding for 20-40min to obtain the anti-scouring ladle bottom castable.
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| CN116396063A (en) * | 2023-03-27 | 2023-07-07 | 宜兴金君耐火炉料有限公司 | 99 castable for resisting copper liquid erosion and peeling in low-oxygen copper rod production |
| CN118420327A (en) * | 2024-07-04 | 2024-08-02 | 湖南立达高新材料有限公司 | Spinel dry ramming mass for medium-frequency induction furnace and preparation method thereof |
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| CN118420327A (en) * | 2024-07-04 | 2024-08-02 | 湖南立达高新材料有限公司 | Spinel dry ramming mass for medium-frequency induction furnace and preparation method thereof |
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