Al-Mg-C brick for steel ladle lining

A technology of aluminum magnesia carbon bricks and ladle furnaces, which is applied to casting molten material containers, manufacturing tools, metal processing equipment, etc., can solve the problems of high carbon content, which is unfavorable for ultra-clean steel production, difficult to meet the requirements of refining processes, etc., and achieves volume maintenance. Stability, good social and economic benefits, and the effect of improving slag resistance

Active Publication Date: 2019-04-26
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of refining process, traditional alumina-magnesia-carbon bricks are difficult to meet the requirements of refining process
The amount of graphite added to the common aluminum-magnesium-carbon bricks in the market is 6-12%wt. The introduction of carbon strengthens the non-wetability of the material and molten steel, improves the slag resistance and thermal stability of the material, but the carbon content is too high Not conducive to the production of ultra-clean steel

Method used

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  • Al-Mg-C brick for steel ladle lining
  • Al-Mg-C brick for steel ladle lining
  • Al-Mg-C brick for steel ladle lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Alumina-magnesia-carbon bricks include the following raw materials by weight percentage:

[0025]

[0026] Wherein, Al in the aluminum-magnesium-carbon recycled material 2 o 3 The mass percentage of the alumina-magnesia-carbon brick is ≥ 45%, and the particle size of the alumina-magnesia-carbon brick recycled material is 0.088mm≤particle size≤6mm, wherein: the alumina-magnesia-carbon brick recycled material with a particle size of 0.088mm≤particle size≤1mm accounts for 5% of the total mass of the alumina-magnesia-carbon brick recycled material , 1mm ≤ particle size ≤ 3mm aluminum magnesium carbon brick recycled materials accounted for 50% of the total mass of aluminum magnesium carbon brick recycled materials, 3mm ≤ particle size ≤ 5mm aluminum magnesium carbon brick recycled materials accounted for 45% of the total mass of aluminum magnesium carbon brick recycled materials ; The mass percentage of MgO in magnesia is ≥97%, and the particle size of magnesia is ≤1mm, ...

Embodiment 2

[0029] Alumina-magnesia-carbon bricks include the following raw materials by weight percentage:

[0030]

[0031] Wherein, Al in the aluminum-magnesium-carbon recycled material 2 o 3 The mass percentage of the alumina-magnesia-carbon brick is ≥ 45%, and the particle size of the alumina-magnesia-carbon brick recycled material is 0.088mm≤particle size≤6mm, wherein: the alumina-magnesia-carbon brick recycled material with a particle size of 0.088mm≤particle size≤1mm accounts for 5% of the total mass of the alumina-magnesia-carbon brick recycled material , 1mm ≤ particle size ≤ 3mm aluminum magnesium carbon brick recycled materials accounted for 50% of the total mass of aluminum magnesium carbon brick recycled materials, 3mm ≤ particle size ≤ 5mm aluminum magnesium carbon brick recycled materials accounted for 45% of the total mass of aluminum magnesium carbon brick recycled materials ; The mass percentage of MgO in magnesia is ≥97%, and the particle size of magnesia is ≤1mm, ...

Embodiment 3

[0034] Alumina-magnesia-carbon bricks include the following raw materials by weight percentage:

[0035]

[0036] Wherein, Al in the aluminum-magnesium-carbon recycled material 2 o 3 The mass percentage of aluminum-magnesium-carbon bricks is ≥45%, and the particle size of the recycled materials for aluminum-magnesia-carbon bricks is 0.088mm≤particle size≤6mm, among which: the recycled materials for aluminum-magnesium-carbon bricks with a particle size of 0.088mm≤1mm account for 5% of the total mass of recycled materials for aluminum-magnesia-carbon bricks , 1mm ≤ particle size ≤ 3mm aluminum magnesium carbon brick recycled materials accounted for 50% of the total mass of aluminum magnesium carbon brick recycled materials, 3mm ≤ particle size ≤ 5mm aluminum magnesium carbon brick recycled materials accounted for 45% of the total mass of aluminum magnesium carbon brick recycled materials ; The mass percentage of MgO in magnesia is ≥97%, and the particle size of magnesia is ≤...

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Abstract

The invention discloses an Al-Mg-C brick for a steel ladle lining. The Al-Mg-C brick is prepared from 50%-70% by weight of Al-Mg-C reclaimed materials, 5%-20% by weight of magnesia, 10%-25% by weightof alpha-Al2O3, 3%-10% by weight of AlN, 2%-6% by weight of crystalline flake graphite, 2%-3% by weight of SiC and 2.5%-3.5% by weight of phenolic resin. Due to addition of AlN, compared with a traditional Al-Mg-C brick, the Al-Mg-C brick is more resistant to high-temperature scouring, expansion coefficient of a brick body is reduced at the use temperature, volume stability is maintained, AlN is not corroded by molten metal, and slag resistance of the material is improved; a small amount of graphite is added, so that molten steel decarburization is facilitated, and the type of ultra-low carbonsteel is smelted; a large quantity of the Al-Mg-C reclaimed materials are adopted, therefore, the use quantity of high-bauxite clinkers or corundum particles is greatly reduced, the production cost is lower, and the Al-Mg-C brick has better social benefits and economic benefits.

Description

technical field [0001] The invention relates to a furnace lining brick for ladle refining, in particular to an aluminum-magnesium-carbon brick for a ladle lining. Background technique [0002] Usually, the refractory material used for ladle lining is alumina-magnesia-carbon bricks, such as bauxite (corundum), magnesia, and graphite, which are pressed by a phenolic resin bonding machine and have good performance; the damage methods are mainly molten steel and slag erosion, heat Damage caused by erosion and spalling, excessive thermal volume change. With the improvement of refining process, it is difficult for traditional alumina-magnesia-carbon bricks to meet the requirements of refining process. The amount of graphite added to the common aluminum-magnesium-carbon bricks in the market is 6-12%wt. The introduction of carbon strengthens the non-wetability of the material and molten steel, improves the slag resistance and thermal stability of the material, but the carbon conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B22D41/02
CPCB22D41/02C04B35/62204C04B35/66C04B2235/3206C04B2235/3217C04B2235/3826C04B2235/3865C04B2235/425C04B2235/77C04B2235/96C04B2235/9676
Inventor 阳灿徐源
Owner WUGANG REFRACTORY CO LTD
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