CN104478454A - Refractory material used for ladle and preparation method of refractory material - Google Patents
Refractory material used for ladle and preparation method of refractory material Download PDFInfo
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- CN104478454A CN104478454A CN201410804022.3A CN201410804022A CN104478454A CN 104478454 A CN104478454 A CN 104478454A CN 201410804022 A CN201410804022 A CN 201410804022A CN 104478454 A CN104478454 A CN 104478454A
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- refractory
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- andalusite
- flint clay
- foundry ladle
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- 239000011819 refractory material Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 36
- 229910052849 andalusite Inorganic materials 0.000 claims abstract description 34
- 239000004927 clay Substances 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 30
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 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 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 55
- 239000011449 brick Substances 0.000 claims description 31
- 239000007767 bonding agent Substances 0.000 claims description 19
- 229910052710 silicon Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 10
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 238000010304 firing Methods 0.000 claims description 7
- 239000012258 stirred mixture Substances 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 abstract description 6
- 239000002893 slag Substances 0.000 abstract description 4
- 235000006708 antioxidants Nutrition 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 229910052742 iron Inorganic materials 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 6
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 6
- 229910052863 mullite Inorganic materials 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Abstract
The invention belongs to the technical field of refractory materials, and particularly relates to a refractory material used for a ladle and a preparation method of the refractory material. The refractory material is prepared from the following materials in percentage by weight: 35-63% of flint clay, 12-35% of andalusite, 5-10% of Guangxi white mud, 7-16% of silicon carbide, 3-8% of alumina micro powder and 2-4% of anti-oxidant metal. The refractory material has the characteristics of good size stability, peelingresistance, anti-corrosion, no adhering slag and good thermal insulation. The preparation method is simple in process and easy to conduct.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a refractory material for a foundry ladle and a preparation method thereof.
Background
The ladle is a kind of transport equipment of molten iron, mainly transport the blast furnace molten iron to the converter or mixing iron furnace, with the improvement and development of the steel-making technology, sometimes the ladle will also undertake the pretreatment task of molten iron, mainly carry on the desulfurization to the molten iron, the fluctuation interval of the molten iron use temperature is 1350-.
At present, the traditional refractory materials for the ladle mainly adopt high-alumina bricks, sintered aluminum silicon carbide bricks and unfired aluminum silicon carbide carbon bricks. The high-alumina brick is determined by the characteristics of the material, is unsatisfactory in the aspects of scour resistance, erosion resistance and spalling resistance, has short service cycle, frequent replacement and high labor intensity, but is still used in small and medium-sized iron and steel enterprises due to low cost. The burnt aluminum silicon carbide brick and mullite silicon carbide brick contain silicon carbide, so the corrosion resistance and the scouring resistance are greatly improved, but due to the large elastic modulus and the large thermal expansion coefficient, the deteriorated layer and the original brick layer are easy to separate and peel off in the frequent cold and heat exchange process of the ladle, so the surface corrosion of the working layer is uneven, and the service life is greatly reduced. Causing the instable furnace life and aggravating the potential safety hazard. The unburned aluminum silicon carbide carbon brick is widely applied to various large steel mills due to excellent comprehensive performance, but because the unburned aluminum silicon carbide carbon brick contains carbon materials such as graphite, the part exposed in the air such as a slag line is easy to oxidize, become loose and is firstly corroded, the scouring resistance is rapidly reduced, and under the condition of containing carbon, the unburned aluminum silicon carbide carbon brick has high heat conductivity coefficient, easily causes high furnace shell temperature, high heat loss, easy caking and difficult treatment, causes passive production, and is particularly prominent in some steel mills with long molten iron turnover routes.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a refractory material for a foundry ladle, which has the characteristics of good volume stability, anti-stripping, corrosion resistance, no slag adhering and good heat preservation; the invention also provides a preparation method thereof.
The refractory material for the foundry ladle is prepared from the following raw materials in percentage by weight:
wherein,
the flint clay has the following chemical component requirements: al (Al)2O3≥43％，Fe2O3≤1.2％。
The andalusite has the following chemical component requirements: al (Al)2O3≥58％，Fe2O3≤1.0％，TiO2≤0.6％，R2O≤1.2％。
The antioxidant metal is metal silicon, and the granularity of the metal silicon is-200 meshes.
The particle sizes of Guangxi white mud and silicon carbide are both-200 meshes. The Guangxi white mud has the following chemical component requirements: al (Al)2O3≥30％，Fe2O3Less than or equal to 1.2 percent. The silicon carbide has the following chemical composition requirements: SiC is more than or equal to 90 percent.
The granularity of the alumina micro powder is 3-6 μm. The alumina micro powder has the following chemical component requirements: al (Al)2O3≥99％。
The preparation method of the refractory material for the foundry ladle comprises the following steps:
(1) uniformly mixing silicon carbide, alumina micro powder, antioxidant metal, Guangxi white mud and andalusite fine powder with the particle size of-200 meshes;
(2) adding a bonding agent and water into flint clay particles with the particle size of 1.0-3.0mm, uniformly stirring, adding the mixture obtained in the step (1), and continuously stirring for 3-5 min;
(3) and (3) performing pressure forming on the stirred mixture obtained in the step (2) to obtain a formed green brick, drying the green brick, and firing at 1350-.
In the step (2), before the bonding agent and the water are added, flint clay particles with the particle size of 0.1-1.0mm and andalusite particles with the particle size of 0.1-1mm are also added.
The mass ratio of the flint clay particles with the particle size of 0.1-1.0mm to the flint clay particles with the particle size of 1.0-3.0mm is 8-28: 32-35.
The mass ratio of the andalusite fine powder with the grain diameter of-200 meshes to the andalusite grains with the grain diameter of 0.1-1mm is 7-15: 10-28.
The mixture in the step (2) is sulfurous acid pulp waste liquor, and the adding amount of the sulfurous acid pulp waste liquor accounts for 2% of the total mass of the flint clay, andalusite, Guangxi white mud, silicon carbide, alumina micropowder and antioxidant metal.
And (4) drying the green brick in the step (3), wherein the drying temperature is 60-80 ℃, and the drying time is 20-40 h.
Compared with the prior art, the invention has the following advantages:
(1) the invention adopts flint clay and andalusite as main raw materials, the andalusite is easy to form mullite accompanied by 3-5.4% volume expansion during high-temperature calcination, the shrinkage of low-melting substances such as alkali metal and the like in the raw materials can be compensated under the high-temperature condition, and the mullite interconnection structure formed in the high-temperature calcination process can homogenize the expansibility of the refractory material. In the common mullite silicon carbide brick, the microstructure formed by mullite is a uniform structure, while the combination of mullite polycrystalline aggregates generated by calcining andalusite and the mineral phase of the flint clay presents a multiphase non-homogeneous system on the microstructure, the multi-heterogeneous system can ensure the volume stability at high temperature, and the multiphase structure is helpful for improving the thermal stability of the material.
(2) The proper amount of silicon carbide is added, so that the high-temperature index and the corrosion resistance of the material can be improved, the addition amount of the silicon carbide is proper in a range of 7-16%, and if the addition amount is obviously lower than 7%, the addition synergy of the silicon carbide is not obvious; if the addition amount is more than 16%, the manufacturing cost of the material is greatly increased, and the use effect is not obviously improved.
(3) The refractory material for the foundry ladle has the characteristics of good volume stability, stripping resistance, corrosion resistance and no slag adhering, and reduces the manufacturing cost while ensuring the service life and the effect.
(4) The preparation method of the invention has simple process and easy realization.
Detailed Description
The present invention will be further described with reference to the following examples.
All the starting materials used in the examples are commercially available, except where otherwise indicated.
Example 1
A refractory material for ladles is prepared from the following raw materials,
the preparation method comprises the following steps:
(1) uniformly mixing silicon carbide, alumina micro powder, metallic silicon, Guangxi white mud and andalusite fine powder with the particle size of-200 meshes.
(2) Uniformly mixing flint clay particles with the particle size of 1.0-3.0mm, flint clay particles with the particle size of 0.1-1mm and andalusite particles with the particle size of 0.1-1mm, adding a bonding agent and water, uniformly stirring, adding the mixture obtained in the step (1), and continuously stirring for 5 min; wherein the bonding agent is waste sulfurous acid pulp liquor, and the addition amount of the bonding agent accounts for 2 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon; the water accounts for 3 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon.
(3) Pressing and molding the stirred mixture obtained in the step (2) by using a high-tonnage friction press machine to obtain a molded green brick, wherein the density of the molded green brick is 2.44g/cm3And drying the green brick at 60 ℃ for 40h, and firing at 1350 ℃ for 8h to obtain the refractory material for the foundry ladle.
Example 2
A refractory material for ladles is prepared from the following raw materials,
the preparation method comprises the following steps:
(1) uniformly mixing silicon carbide, alumina micro powder, metallic silicon, Guangxi white mud and andalusite fine powder with the particle size of-200 meshes.
(2) Uniformly mixing flint clay particles with the particle size of 1.0-3.0mm, flint clay particles with the particle size of 0.1-1mm and andalusite particles with the particle size of 0.1-1mm, adding a bonding agent and water, uniformly stirring, adding the mixture obtained in the step (1), and continuously stirring for 3 min; wherein the bonding agent is waste sulfurous acid pulp liquor, and the addition amount of the bonding agent accounts for 2 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon; the water accounts for 3 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon.
(3) Pressing and molding the stirred mixture obtained in the step (2) by using a high-tonnage friction press machine to obtain a molded green brick, wherein the density of the molded green brick is 2.46g/cm3And drying the green brick at 70 ℃ for 30h, and firing at 1400 ℃ for 7h to obtain the refractory material for the foundry ladle.
Example 3
A refractory material for ladles is prepared from the following raw materials,
the preparation method comprises the following steps:
(1) uniformly mixing silicon carbide, alumina micro powder, metallic silicon, Guangxi white mud and andalusite fine powder with the particle size of-200 meshes.
(2) Uniformly mixing flint clay particles with the particle size of 1.0-3.0mm, flint clay particles with the particle size of 0.1-1mm and andalusite particles with the particle size of 0.1-1mm, adding a bonding agent and water, uniformly stirring, adding the mixture obtained in the step (1), and continuously stirring for 3 min; wherein the bonding agent is waste sulfurous acid pulp liquor, and the addition amount of the bonding agent accounts for 2 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon; the water accounts for 3 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon.
(3) Pressing and molding the stirred mixture obtained in the step (2) by using a high-tonnage friction press machine to obtain a molded green brick, wherein the density of the molded green brick is 2.46g/cm3And drying the green brick at 80 ℃ for 20h, and firing at 1450 ℃ for 6h to obtain the refractory material for the foundry ladle.
Example 4
A refractory material for ladles is prepared from the following raw materials,
the preparation method comprises the following steps:
(1) uniformly mixing silicon carbide, alumina micro powder, metallic silicon, Guangxi white mud and andalusite fine powder with the particle size of-200 meshes.
(2) Uniformly mixing flint clay particles with the particle size of 1.0-3.0mm and flint clay particles with the particle size of 0.1-1mm, adding a bonding agent and water, uniformly stirring, adding the mixture obtained in the step (1), and continuously stirring for 3 min; wherein the bonding agent is waste sulfurous acid pulp liquor, and the addition amount of the bonding agent accounts for 2 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon; the water accounts for 3 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon.
(3) Pressing the stirred mixture obtained in the step (2) by using a high-tonnage friction pressMolding to obtain a molded green brick with the density of 2.46g/cm3And drying the green brick at 80 ℃ for 20h, and firing at 1450 ℃ for 6h to obtain the refractory material for the foundry ladle.
Example 5
A refractory material for ladles is prepared from the following raw materials,
the preparation method comprises the following steps:
(1) uniformly mixing silicon carbide, alumina micro powder, metallic silicon, Guangxi white mud and andalusite fine powder with the particle size of-200 meshes.
(2) Uniformly mixing flint clay particles with the particle size of 1.0-3.0mm and andalusite particles with the particle size of 0.1-1mm, adding a bonding agent and water, uniformly stirring, adding the mixture obtained in the step (1), and continuously stirring for 3 min; wherein the bonding agent is waste sulfurous acid pulp liquor, and the addition amount of the bonding agent accounts for 2 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon; the water accounts for 3 percent of the total mass of the flint clay, the andalusite, the Guangxi white mud, the silicon carbide, the alumina micro powder and the metal silicon.
(3) Pressing and molding the stirred mixture obtained in the step (2) by using a high-tonnage friction press machine to obtain a molded green brick, wherein the density of the molded green brick is 2.46g/cm3And drying the green brick at 70 ℃ for 30h, and firing at 1400 ℃ for 7h to obtain the refractory material for the foundry ladle.
Claims (10)
1. A refractory material for a foundry ladle, characterized by: the material is prepared from the following raw materials in percentage by weight:
2. the refractory for a foundry ladle according to claim 1, wherein: the antioxidant metal is metal silicon, and the granularity of the metal silicon is-200 meshes.
3. The refractory for a foundry ladle according to claim 1, wherein: the particle sizes of Guangxi white mud and silicon carbide are both-200 meshes.
4. The refractory for a foundry ladle according to claim 1, wherein: the granularity of the alumina micro powder is 3-6 μm.
5. A method of producing a refractory for foundry ladles as defined in any one of claims 1 to 4, wherein: the method comprises the following steps:
(1) uniformly mixing silicon carbide, alumina micro powder, antioxidant metal, Guangxi white mud and andalusite fine powder with the particle size of-200 meshes;
(2) adding a bonding agent and water into flint clay particles with the particle size of 1.0-3.0mm, uniformly stirring, adding the mixture obtained in the step (1), and continuously stirring for 3-5 min;
(3) and (3) performing pressure forming on the stirred mixture obtained in the step (2) to obtain a formed green brick, drying the green brick, and firing at 1350-.
6. The method of preparing a refractory for a foundry ladle according to claim 5, wherein: in the step (2), before the bonding agent and the water are added, flint clay particles with the particle size of 0.1-1.0mm and andalusite particles with the particle size of 0.1-1mm are also added.
7. The method of preparing a refractory for a foundry ladle according to claim 6, wherein: the mass ratio of the flint clay particles with the particle size of 0.1-1.0mm to the flint clay particles with the particle size of 1.0-3.0mm is 8-28: 32-35.
8. The method of preparing a refractory for a foundry ladle according to claim 6, wherein: the mass ratio of the andalusite fine powder with the grain diameter of-200 meshes to the andalusite grains with the grain diameter of 0.1-1mm is 7-15: 10-28.
9. The method of preparing a refractory for a foundry ladle according to claim 5, wherein: the mixture in the step (2) is sulfurous acid pulp waste liquor, and the adding amount of the sulfurous acid pulp waste liquor accounts for 2% of the total mass of the flint clay, andalusite, Guangxi white mud, silicon carbide, alumina micropowder and antioxidant metal.
10. The method of preparing a refractory for a foundry ladle according to claim 5, wherein: and (4) drying the green brick in the step (3), wherein the drying temperature is 60-80 ℃, and the drying time is 20-40 h.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105481409A (en) * | 2016-01-28 | 2016-04-13 | 郑州安联凯实业有限公司 | Anti-erosion refractory material |
| CN111777409A (en) * | 2020-07-10 | 2020-10-16 | 首钢集团有限公司 | Brick for molten iron ladle with high slag corrosion resistance and preparation method thereof |
| CN115385701A (en) * | 2022-08-12 | 2022-11-25 | 河南瑞泰耐火材料科技有限公司 | Non-ferrous smelting anode furnace oxygen blowing and reducing agent blowing pipe coating material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481409A (en) * | 2016-01-28 | 2016-04-13 | 郑州安联凯实业有限公司 | Anti-erosion refractory material |
| CN111777409A (en) * | 2020-07-10 | 2020-10-16 | 首钢集团有限公司 | Brick for molten iron ladle with high slag corrosion resistance and preparation method thereof |
| CN115385701A (en) * | 2022-08-12 | 2022-11-25 | 河南瑞泰耐火材料科技有限公司 | Non-ferrous smelting anode furnace oxygen blowing and reducing agent blowing pipe coating material and preparation method thereof |
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| CN104478454B (en) | 2017-01-18 |
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