CN104788113A - Lightweight corrosion-resistant aluminum-magnesium castable and preparation method thereof - Google Patents
Lightweight corrosion-resistant aluminum-magnesium castable and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a lightweight corrosion-resistant aluminum-magnesium castable and a preparation method thereof. According to the technical scheme, the lightweight corrosion-resistant aluminum-magnesium castable comprises the following components in percentage by weight: 64 to 81 percent of microporous corundum particles, 5 to 13 percent of corundum fine powder, 5 to 8 percent of alpha-alumina micro powder, 5 to 8 percent of magnesia fine powder and 3 to 7 percent of a bonding agent. The preparation method comprises the following steps: mixing the corundum fine powder, the alpha-alumina micro powder, the magnesia fine powder and the bonding agent according to the components and contents of the lightweight corrosion-resistant aluminum-magnesium castable, then adding a polycarboxylic water reducer in an amount which is 0.05 to 0.15 percent based on the weight of the lightweight corrosion-resistant aluminum-magnesium castable, and performing uniform mixing to obtain a premix; adding the microporous corundum particles into the premix, and performing uniform stirring to obtain the lightweight corrosion-resistant aluminum-magnesium castable. The lightweight corrosion-resistant aluminum-magnesium castable has the characteristics of small average aperture, low apparent porosity, stronger high-temperature strength, high volume stability, lower thermal conductivity and high slag penetration resistance, and is long in service life, and unit refractory material consumption can be effectively reduced.
Description
Technical field
The invention belongs to aluminium-magnesium mould material technical field.Be specifically related to a kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.
Background technology
Along with the raising of the energy-saving and cost-reducing requirement of the high energy-consuming industries such as iron and steel, lightweight becomes one of important research direction of refractory materials, and the outstanding problem thereupon produced is that can slag resistance be guaranteed.Matrix determines refractory materials, the especially key of lightweight refractory anti-scour property.Ladle is under arms in process, and first slag and molten steel penetrate into material internal by the crackle in matrix or pore, and form low-melting-point material phase with substrate reaction, changes materials microstructure, and then produces larger crackle until formed and peel off.Therefore, improve the permeability resistance of matrix, the microstructure improving matrix is the important channel of improving lightweight refractory anti-scour property.
For the problem of matrix slag corrosion resistance scarce capacity, existing method adopts the method for adding sintering aid mostly, improves the sintering character of matrix, improves the rear matrix compactness extent of sintering.Such as add micron or nano level ZrO
2or TiO
2, the sintering of powder is promoted by the surface effects of nano-powder and high reactivity.But the most limited use of these methods, and ZrO
2or TiO
2expensive, be difficult to a large amount of interpolation.For this problem, applicants have invented the patented technology of " a kind of aluminum-magnesium light castable and preparation method thereof " (CN20101059586.3), by adding fine magnesium oxide micro-powder, the hydrophobicity of water reducer group is utilized to control formation and the growth of magnesium hydroxide crystal, make generate the rod-like magnesium hydroxide crystal of uniform crossover in mould material inside and form reticulated structure, replace the keying action that silicon oxide aquation produces, while raising casting material strength, also improve its slag resistance.But the grinding process of this MgO micro mist is comparatively complicated, and be difficult to dispersion, be still not suitable for large-scale commercial production at present.
Summary of the invention
The object of this invention is to provide light weight anticorodal aluminum-magnesium mould material that a kind of mean pore size is little, apparent porosity low and high temperature intensity is comparatively large, volume stability is good, thermal conductivity is lower and anti-slag penetrating power is strong and preparation method thereof.
For achieving the above object, the technical solution used in the present invention is: composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material are: the micropore corundum in granules of 64 ~ 81wt%, the corundum fine powder of 5 ~ 13wt%, the Alpha-alumina micro mist of 5 ~ 8wt%, the magnesia powder of 5 ~ 8wt%, the bonding agent of 3 ~ 7wt%.
By composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material, first corundum fine powder, Alpha-alumina micro mist, magnesia powder and bonding agent are mixed, the poly carboxylic acid series water reducer of additional described light weight anticorodal aluminum-magnesium mould material 0.05 ~ 0.15wt%, mixes again, obtained Preblend; Then micropore corundum in granules is added in Preblend, stir, obtained light weight anticorodal aluminum-magnesium mould material.
The volume density of described micropore corundum in granules is 2.8 ~ 3.3g/cm
3, apparent porosity is 1 ~ 4%, and mean pore size is 0.1 ~ 0.5 μm; Grain composition and the sphericity of described micropore corundum in granules are:
Particle diameter be 8 ~ 5mm account for 16 ~ 24wt%, sphericity is 0.7 ~ 1;
Particle diameter be 5 ~ 3mm account for 15 ~ 20wt%, sphericity is 0.38 ~ 1;
Particle diameter be 3 ~ 1mm account for 25 ~ 30wt%, sphericity is 0.45 ~ 1;
Particle diameter be 1 ~ 0.088mm account for 35 ~ 40wt%, sphericity is 0.54 ~ 1.
Described corundum fine powder is one or both in plate diamond spar fine powder and white fused alumina fine powder; The particle diameter of corundum fine powder is less than 0.088mm, sphericity >0.55.
The content of MgO >90wt% of described magnesia powder, particle diameter is D
50<23.5 μm, sphericity >0.55.
The Al of described Alpha-alumina micro mist
2o
3content >99wt%, particle diameter is D
50<1.94 μm, sphericity >0.55.
Described bonding agent is one or both in cement and silicon powder, the mass ratio >15 of cement and silicon powder; Described bonding agent particle diameter D
50<9.3 μm, sphericity >0.55.
Owing to adopting technique scheme, the present invention compared with prior art has following positively effect:
The present invention is by setting up the packing density of particle mathematical model of continuous ionic exchange, the geometrical shape of comprehensive mould material aggregate and matrix powder, particle diameter proportioning and the factor such as short grained " contract Body Effect " and oarse-grained " body of wall effect " when piling up, and consider the impact of high temperature sintering on mould material matrix; Adopt computer simulation prediction tap density, the Gu Liao ︰ matrix breaching traditional refractory castable is that the carse, medium and small percentage composition of 7 ︰ 3 and different-grain diameter raw material " is small at both ends and big in the middle " restriction of experience.Thus to remain contained by light weight properties of alumina-magnesia castables while micropore corundum aggregate reduces the close and thermal conductivity of integral material body, effectively make use of the particle packing behavior between matrix fine powder, improve matrix sintering character when not adding other admixtures, improving the microstructure of matrix.
Light weight anticorodal aluminum prepared by the present invention-magnesium mould material resistance performance of slag corrosion, especially slag penetration resistance can obviously strengthen by other light materials comparatively at present; And introduce owing to not adding the impurity that other sintering aids cause, the high-temperature behavior of material also has and comparatively significantly improves.Light weight anticorodal aluminum-magnesium mould material prepared by the present invention is after testing: volume density is 2.6 ~ 2.85g/cm
3; Apparent porosity is 12 ~ 15%; After 1500 DEG C × 3h burns, folding strength is 16 ~ 25Mpa; Compressive strength is 150 ~ 165MPa.
Therefore, light weight anticorodal aluminum-magnesium mould material prepared by the present invention has the advantages that mean pore size is little, apparent porosity low and high temperature intensity is comparatively large, volume stability is good, thermal conductivity is lower and anti-slag penetrating power is strong, unit refractory consumption rate can be effectively reduced, long service life for refining ladle working lining.
Embodiment
Below in conjunction with embodiment, the invention will be further described, the restriction not to protection domain:
For avoiding repetition, existing by as follows for the physical and chemical parameter Unify legislation of raw material involved by this embodiment, repeat no more in specific embodiment.
The volume density of described micropore corundum in granules is 2.8 ~ 3.3g/cm
3, apparent porosity is 1 ~ 4%, and mean pore size is 0.1 ~ 0.5 μm; Grain composition and the sphericity of described micropore corundum in granules are:
Particle diameter be 8 ~ 5mm account for 16 ~ 24wt%, sphericity is 0.7 ~ 1;
Particle diameter be 5 ~ 3mm account for 15 ~ 20wt%, sphericity is 0.38 ~ 1;
Particle diameter be 3 ~ 1mm account for 25 ~ 30wt%, sphericity is 0.45 ~ 1;
Particle diameter be 1 ~ 0.088mm account for 35 ~ 40wt%, sphericity is 0.54 ~ 1.
The particle diameter of described plate diamond spar fine powder and white fused alumina fine powder is all less than 0.088mm, the equal >0.55 of sphericity.
The content of MgO >90wt% of described magnesia powder, particle diameter is D
50<23.5 μm, sphericity >0.55.
The Al of described Alpha-alumina micro mist
2o
3content >99wt%, particle diameter is D
50<1.94 μm, sphericity >0.55.
The mass ratio >15 of described cement and silicon powder; The particle diameter D of described cement and silicon powder
50<9.3 μm, sphericity >0.55.
embodiment 1
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material are: the micropore corundum in granules of 64 ~ 71wt%, the corundum fine powder of 9 ~ 13wt%, the Alpha-alumina micro mist of 7 ~ 8wt%, the magnesia powder of 7 ~ 8wt%, the bonding agent of 5 ~ 7wt%.
By composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material, first corundum fine powder, Alpha-alumina micro mist, magnesia powder and bonding agent are mixed, the poly carboxylic acid series water reducer of additional described light weight anticorodal aluminum-magnesium mould material 0.05 ~ 0.15wt%, mixes again, obtained Preblend; Then micropore corundum in granules is added in Preblend, stir, obtained light weight anticorodal aluminum-magnesium mould material.
In the present embodiment: described corundum fine powder is plate diamond spar fine powder 5; Described bonding agent is cement.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.6 ~ 2.7g/cm
3; Apparent porosity 12 ~ 14%; Folding strength 16 ~ 20Mpa after 1500 DEG C × 3h burns; Compressive strength 150 ~ 155MPa.
embodiment 2
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Except following technical parameter, all the other are with embodiment 1.
In the present embodiment: described corundum fine powder is white fused alumina fine powder; Described bonding agent is silicon powder.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.65 ~ 2.75g/cm
3; Apparent porosity 13 ~ 15%; Folding strength 18 ~ 23Mpa after 1500 DEG C × 3h burns; Compressive strength 150 ~ 160MPa.
embodiment 3
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Except following technical parameter, all the other are with embodiment 1.
In the present embodiment: described corundum fine powder is the mixture of plate diamond spar fine powder and white fused alumina fine powder; Described bonding agent is the mixture of cement and silicon powder.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.7 ~ 2.85g/cm
3; Apparent porosity 13 ~ 15%; Folding strength 22 ~ 25Mpa after 1500 DEG C × 3h burns; Compressive strength 160 ~ 165MPa.
embodiment 4
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material are: the micropore corundum in granules of 69 ~ 75wt%, the corundum fine powder of 8 ~ 11wt%, the Alpha-alumina micro mist of 6 ~ 7wt%, the magnesia powder of 6 ~ 7wt%, the bonding agent of 4 ~ 6wt%.
By composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material, first corundum fine powder, Alpha-alumina micro mist, magnesia powder and bonding agent are mixed, the poly carboxylic acid series water reducer of additional described light weight anticorodal aluminum-magnesium mould material 0.05 ~ 0.15wt%, mixes again, obtained Preblend; Then micropore corundum in granules is added in Preblend, stir, obtained light weight anticorodal aluminum-magnesium mould material.
In the present embodiment: described corundum fine powder is white fused alumina fine powder; Described bonding agent is silicon powder.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.65 ~ 2.75g/cm
3; Apparent porosity 12 ~ 14%; Folding strength 16 ~ 20Mpa after 1500 DEG C × 3h burns; Compressive strength 150 ~ 155MPa.
embodiment 5
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Except following technical parameter, all the other are with embodiment 4.
In the present embodiment: described corundum fine powder is plate diamond spar fine powder; Described bonding agent is cement.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.65 ~ 2.75g/cm
3; Apparent porosity 13 ~ 15%; Folding strength 18 ~ 23Mpa after 1500 DEG C × 3h burns; Compressive strength 150 ~ 160MPa.
embodiment 6
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Except following technical parameter, all the other are with embodiment 4.
In the present embodiment: described corundum fine powder is the mixture of plate diamond spar fine powder and white fused alumina fine powder; Described bonding agent is the mixture of cement and silicon powder.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.65 ~ 2.75g/cm
3; Apparent porosity 13 ~ 15%; Folding strength 22 ~ 25Mpa after 1500 DEG C × 3h burns; Compressive strength 160 ~ 165MPa.
embodiment 7
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material are: the micropore corundum in granules of 75 ~ 81wt%, the corundum fine powder of 5 ~ 8wt%, the Alpha-alumina micro mist of 5 ~ 6wt%, the magnesia powder of 5 ~ 6wt%, the bonding agent of 3 ~ 5wt%.
By composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material, first corundum fine powder, Alpha-alumina micro mist, magnesia powder and bonding agent are mixed, the poly carboxylic acid series water reducer of additional described light weight anticorodal aluminum-magnesium mould material 0.05 ~ 0.15wt%, mixes again, obtained Preblend; Then micropore corundum in granules is added in Preblend, stir, obtained light weight anticorodal aluminum-magnesium mould material.
In the present embodiment: described corundum fine powder is the mixture of plate diamond spar fine powder and white fused alumina fine powder; Described bonding agent is the mixture of cement and silicon powder.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.7 ~ 2.85g/cm
3; Apparent porosity 12 ~ 14%; Folding strength 16 ~ 20Mpa after 1500 DEG C × 3h burns; Compressive strength 150 ~ 155MPa.
embodiment 8
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Except following technical parameter, all the other are with embodiment 7.
In the present embodiment: described corundum fine powder is plate diamond spar fine powder; Described bonding agent is cement.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.7 ~ 2.85g/cm
3, apparent porosity 13 ~ 15%, folding strength 18 ~ 23Mpa, compressive strength 150 ~ 160MPa after 1500 DEG C × 3h burns.
embodiment 9
A kind of light weight anticorodal aluminum-magnesium mould material and preparation method thereof.Except following technical parameter, all the other are with embodiment 7.
In the present embodiment: described corundum fine powder is white fused alumina fine powder; Described bonding agent is silicon powder.
Light weight anticorodal aluminum-magnesium mould material prepared by the present embodiment is after testing: volume density 2.7 ~ 2.85g/cm
3; Apparent porosity 13 ~ 15%; Folding strength 22 ~ 25Mpa after 1500 DEG C × 3h burns; Compressive strength 160 ~ 165MPa.
This embodiment compared with prior art has following positively effect:
This embodiment is by setting up the packing density of particle mathematical model of continuous ionic exchange, the geometrical shape of comprehensive mould material aggregate and matrix powder, particle diameter proportioning and the factor such as short grained " contract Body Effect " and oarse-grained " body of wall effect " when piling up, and consider the impact of high temperature sintering on mould material matrix; Adopt computer simulation prediction tap density, the Gu Liao ︰ matrix breaching traditional refractory castable is that the carse, medium and small percentage composition of 7 ︰ 3 and different material particle diameter " is small at both ends and big in the middle " restriction of experience.Thus to remain contained by light weight properties of alumina-magnesia castables while micropore corundum aggregate reduces the close and thermal conductivity of integral material body, effectively make use of the particle packing behavior between matrix fine powder, improve matrix sintering character when not adding other admixtures, improving the microstructure of matrix.
Light weight anticorodal aluminum-magnesium mould material resistance performance of slag corrosion prepared by this embodiment, especially slag penetration resistance can obviously strengthen by other light materials comparatively at present; And introduce owing to not adding the impurity that other sintering aids cause, the high-temperature behavior of material also has and comparatively significantly improves.Light weight anticorodal aluminum-magnesium mould material prepared by this embodiment is after testing: volume density is 2.6 ~ 2.85g/cm
3; Apparent porosity is 12 ~ 15%; After 1500 DEG C × 3h burns, folding strength is 16 ~ 25Mpa; Compressive strength is 150 ~ 165MPa.
Therefore, light weight anticorodal aluminum-magnesium mould material prepared by this embodiment has the advantages that volume density is little, apparent porosity low and high temperature intensity is comparatively large, volume stability is good, thermal conductivity is lower and anti-slag penetrating power is strong, unit refractory consumption rate can be effectively reduced, long service life for refining ladle working lining.
Claims (6)
1. the preparation method of light weight anticorodal aluminum-magnesium mould material, it is characterized in that composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material are: the micropore corundum in granules of 64 ~ 81wt%, the corundum fine powder of 5 ~ 13wt%, the Alpha-alumina micro mist of 5 ~ 8wt%, the magnesia powder of 5 ~ 8wt%, the bonding agent of 3 ~ 7wt%;
By composition and the content thereof of described light weight anticorodal aluminum-magnesium mould material, first corundum fine powder, Alpha-alumina micro mist, magnesia powder and bonding agent are mixed, the poly carboxylic acid series water reducer of additional described light weight anticorodal aluminum-magnesium mould material 0.05 ~ 0.15wt%, mixes again, obtained Preblend; Then micropore corundum in granules is added in Preblend, stir, obtained light weight anticorodal aluminum-magnesium mould material;
The volume density of described micropore corundum in granules is 2.8 ~ 3.3g/cm
3, apparent porosity is 1 ~ 4%, and mean pore size is 0.1 ~ 0.5 μm; Grain composition and the sphericity of described micropore corundum in granules are:
Particle diameter be 8 ~ 5mm account for 16 ~ 24wt%, sphericity is 0.7 ~ 1,
Particle diameter be 5 ~ 3mm account for 15 ~ 20wt%, sphericity is 0.38 ~ 1,
Particle diameter be 3 ~ 1mm account for 25 ~ 30wt%, sphericity is 0.45 ~ 1,
Particle diameter be 1 ~ 0.088mm account for 35 ~ 40wt%, sphericity is 0.54 ~ 1.
2. the preparation method of light weight anticorodal aluminum-magnesium mould material according to claim 1, is characterized in that described corundum fine powder is one or both in plate diamond spar fine powder and white fused alumina fine powder; The particle diameter of corundum fine powder is less than 0.088mm, sphericity >0.55.
3. the preparation method of light weight anticorodal aluminum-magnesium mould material according to claim 1, is characterized in that the content of MgO >90wt% of described magnesia powder, and particle diameter is D
50<23.5 μm, sphericity >0.55.
4. the preparation method of light weight anticorodal aluminum-magnesium mould material according to claim 1, is characterized in that the Al of described Alpha-alumina micro mist
2o
3content >99wt%, particle diameter is D
50<1.94 μm, sphericity >0.55.
5. the preparation method of light weight anticorodal aluminum-magnesium mould material according to claim 1, is characterized in that described bonding agent is one or both in cement and silicon powder, the mass ratio >15 of cement and silicon powder; Described bonding agent particle diameter D
50<9.3 μm, sphericity >0.55.
6. light weight anticorodal aluminum-magnesium mould material, is characterized in that described light weight anticorodal aluminum-magnesium mould material is the light weight anticorodal aluminum-magnesium mould material prepared by preparation method of the light weight anticorodal aluminum-magnesium mould material according to any one of claim l ~ 5.
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Cited By (9)
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|---|---|---|---|---|
| CN106673672A (en) * | 2015-11-11 | 2017-05-17 | 神华集团有限责任公司 | Composition for preparing molten aluminum runner, molten aluminum runner and preparation method of molten aluminum runner |
| CN106699141A (en) * | 2017-03-07 | 2017-05-24 | 武汉科技大学 | In-situ generated CM2A8 multiphase reinforced steel ladle casting material and preparation method thereof |
| CN107311672A (en) * | 2017-06-30 | 2017-11-03 | 张静芬 | A kind of aluminium chloride combination castable |
| CN110317071A (en) * | 2019-08-16 | 2019-10-11 | 瑞泰马钢新材料科技有限公司 | A kind of ladle working lining low-porosity microporous preformed bricks and its production method |
| CN110642635A (en) * | 2019-11-01 | 2020-01-03 | 天津泽希矿产加工有限公司 | Application of spherical alumina micropowder in refractory castable |
| CN113149621A (en) * | 2021-05-28 | 2021-07-23 | 武汉科技大学 | Energy-saving ladle working lining castable and preparation method thereof |
| CN114605141A (en) * | 2022-01-24 | 2022-06-10 | 郑州振东科技有限公司 | Preparation method of ladle heat-preservation corrosion-resistant permanent layer castable |
| CN114671673A (en) * | 2022-03-31 | 2022-06-28 | 安徽瑞泰新材料科技有限公司 | Corrosion-resistant light-weight refractory material and preparation method thereof |
| CN114716233A (en) * | 2022-04-08 | 2022-07-08 | 江苏晶鑫新材料股份有限公司 | Microporous corundum castable and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106673672A (en) * | 2015-11-11 | 2017-05-17 | 神华集团有限责任公司 | Composition for preparing molten aluminum runner, molten aluminum runner and preparation method of molten aluminum runner |
| CN106699141A (en) * | 2017-03-07 | 2017-05-24 | 武汉科技大学 | In-situ generated CM2A8 multiphase reinforced steel ladle casting material and preparation method thereof |
| CN106699141B (en) * | 2017-03-07 | 2019-05-10 | 武汉科技大学 | In-situ preparation CM2A8Complex phase enhances pouring materialfor steel ladle and preparation method thereof |
| CN107311672A (en) * | 2017-06-30 | 2017-11-03 | 张静芬 | A kind of aluminium chloride combination castable |
| CN110317071A (en) * | 2019-08-16 | 2019-10-11 | 瑞泰马钢新材料科技有限公司 | A kind of ladle working lining low-porosity microporous preformed bricks and its production method |
| CN110642635A (en) * | 2019-11-01 | 2020-01-03 | 天津泽希矿产加工有限公司 | Application of spherical alumina micropowder in refractory castable |
| CN113149621A (en) * | 2021-05-28 | 2021-07-23 | 武汉科技大学 | Energy-saving ladle working lining castable and preparation method thereof |
| CN114605141A (en) * | 2022-01-24 | 2022-06-10 | 郑州振东科技有限公司 | Preparation method of ladle heat-preservation corrosion-resistant permanent layer castable |
| CN114671673A (en) * | 2022-03-31 | 2022-06-28 | 安徽瑞泰新材料科技有限公司 | Corrosion-resistant light-weight refractory material and preparation method thereof |
| CN114716233A (en) * | 2022-04-08 | 2022-07-08 | 江苏晶鑫新材料股份有限公司 | Microporous corundum castable and production method thereof |
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