Alumina-magnesia-carbon bricks for ladle lining

A technology of aluminum magnesia carbon bricks and ladle furnaces, which is applied to manufacturing tools, casting melt containers, casting equipment, etc., can solve the problems of difficulty in meeting refining process requirements, high carbon content is not conducive to ultra-clean steel production, etc., and maintain volume stability. performance, good social and economic benefits, and low production costs

Active Publication Date: 2021-10-15
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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  • Alumina-magnesia-carbon bricks for ladle lining
  • Alumina-magnesia-carbon bricks for ladle lining
  • Alumina-magnesia-carbon bricks for 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 aluminum-magnesium-carbon brick for ladle furnace lining, which comprises 50-70% of aluminum-magnesium-carbon recycled materials, 5-20% of magnesia, and 10-25% of α-Al 2 o 3 , 3-10% AlN, 2-6% flake graphite, 2-3% silicon carbide and 2.5-3.5% phenolic resin. Due to the addition of AlN, the alumina-magnesia-carbon brick of the present invention is more resistant to high-temperature erosion compared with traditional alumina-magnesia-carbon bricks, reduces the overall expansion of the brick body at the use temperature, maintains volume stability, and AlN is not eroded by molten metal. The slag resistance of the material is improved; the amount of graphite added is small, which is beneficial to the decarburization of molten steel and the smelting of ultra-low carbon steel; a large number of aluminum-magnesium-carbon brick recycled materials are used, which greatly reduces the high-alumina bauxite clinker or corundum particles The usage of materials is lower, the production cost is lower, and it has better social 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 Patents(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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