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A kind of ultra-low carbon magnesia-carbon brick for stainless steel ladle bottom and preparation method thereof

A carbon-magnesia-carbon brick and stainless steel technology, which is applied in the field of ultra-low carbon magnesia-carbon bricks for the bottom of stainless steel ladles and its preparation, can solve problems such as thermal shock stability and the impact of molten steel erosion resistance, and achieve enhanced strength and increased strength , Improve the effect of fracture toughness

Active Publication Date: 2020-12-18
北京利尔高温材料股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for low-carbon magnesia-carbon bricks, as the carbon content decreases, its thermal shock stability and molten steel erosion resistance will be greatly affected. Improving the thermal shock stability and molten steel erosion resistance of low-carbon magnesia-carbon products becomes problem to be solved

Method used

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  • A kind of ultra-low carbon magnesia-carbon brick for stainless steel ladle bottom and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The ultra-low carbon magnesia carbon brick for the bottom of the stainless steel ladle described in this embodiment is calculated according to the mass fraction, and the preparation raw materials include: 25 parts of fused magnesia 5-3mm, 30 parts of fused magnesia 3-1mm, fused magnesia 15 parts of magnesia 1-0.074mm, 21.7 parts of fused magnesia 0.074mm, 1 part of graphite-198, 1 part of carbon resin powder, 0.5 parts of N990 carbon black, MgO-Al 2 o 3 -ZrO 2 1.5 parts of composite powder, 3 parts of metal aluminum powder, 2.8 parts of liquid phenolic resin; among them, MgO-Al 2 o 3 -ZrO 2 In composite powder, MgO, Al 2 o 3 , ZrO 2 The mass ratio is 1:3:5.

[0038] The preparation method of the ultra-low carbon magnesia carbon brick for the bottom of the stainless steel ladle described in the present embodiment comprises the following steps:

[0039] S1. Take fused magnesia with particle size of 5-3mm, 3-1mm, and 1-0.074mm according to the above mass parts, dry...

Embodiment 2

[0043] The ultra-low carbon magnesia carbon brick for the bottom of the stainless steel ladle described in this embodiment is calculated according to the mass fraction, and the preparation raw materials include: 25 parts of fused magnesia 5-3mm, 30 parts of fused magnesia 3-1mm, fused magnesia 15 parts of magnesia 1-0.074mm, 21.7 parts of fused magnesia 0.074mm, 0.5 parts of graphite-197, 0.5 parts of graphite-194, 1 part of carbon resin powder, 0.5 parts of N990 carbon black, 0.5 parts of N330 carbon black, MgO -Al 2 o 3 -ZrO 2 1.5 parts of composite powder, 3 parts of metal aluminum powder, 0.3 parts of boron carbide, 2.8 parts of liquid phenolic resin; among them, MgO-Al 2 o 3 -ZrO 2 In composite powder, MgO, Al 2 o 3 , ZrO 2 The mass ratio is 2:4:4.

[0044] The preparation method of the ultra-low carbon magnesia-carbon brick for the bottom of the stainless steel ladle described in this embodiment is the same as that in Example 1.

Embodiment 3

[0046] The ultra-low carbon magnesia carbon brick for the bottom of the stainless steel ladle described in this embodiment is calculated according to the mass fraction, and the preparation raw materials include: 25 parts of fused magnesia 5-3mm, 30 parts of fused magnesia 3-1mm, fused magnesia 15 parts of magnesia 1-0.074mm, 21.2 parts of fused magnesia 0.074mm, 1.5 parts of graphite-194, 1 part of carbon resin powder, 0.5 parts of N990 carbon black, 0.5 parts of N330 carbon black, MgO-Al 2 o 3 -ZrO 2 1.5 parts of composite powder, 3 parts of metal aluminum powder, 0.3 parts of boron carbide, 2.8 parts of liquid phenolic resin; among them, MgO-Al 2 o 3 -ZrO 2 In composite powder, MgO, Al 2 o 3 , ZrO 2 The mass ratio is 1:4:4.

[0047] The preparation method of the ultra-low carbon magnesia-carbon brick for the bottom of the stainless steel ladle described in this embodiment is the same as that in Example 1.

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Abstract

The invention provides an ultralow-carbon magnesia carbon brick for the bottom of a stainless steel ladle, and a preparation method thereof. The ultralow-carbon magnesia carbon brick for the bottom ofthe stainless steel ladle is prepared from, by mass, 50 to 120 parts of fused magnesite, 0.5 to 5 parts of graphite, 1 to 5 parts of liquid phenolic resin, 0.5 to 5 parts of carbon-containing resin powder, 0.1 to 5 parts of carbon black, 0.5 to 5 parts of MgO-Al2O3-ZrO2 composite powder, 0.5 to 8 parts of metal aluminum powder and 0 to 1 part of boron carbide. The ultralow-carbon magnesia carbonbrick for the bottom of the stainless steel ladle has very strong thermal shock stability and molten steel scouring resistance; the ultralow-carbon magnesia carbon brick does not recarburize molten steel; the heat conductivity is low, and the heat loss is reduced; CO2 emission is low, and environmental friendliness is achieved; and the use of natural resources is reduced in the production process.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an ultra-low-carbon magnesia-carbon brick for the bottom of a stainless steel ladle and a preparation method thereof. Background technique [0002] The steel ladle is also called the steel ladle and the steel drum. It is used to hold the molten steel, and the refining process of the molten steel is also carried out in the ladle. The quality of the ladle affects the previous steelmaking process and the subsequent refining and continuous The quality of molten steel in the casting process, the life of the furnace lining, and the production rhythm. With the continuous progress and continuous development of high-purity clean steel used in special fields (such as aerospace), the requirements for the content of impurities and alloy elements in steel are becoming more and more stringent; and the construction of an energy-saving and environmentally friendly societ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043C04B35/634
CPCC04B35/0435C04B35/634C04B35/63476C04B2235/3217C04B2235/3222C04B2235/3244C04B2235/3821C04B2235/402C04B2235/424C04B2235/425C04B2235/77C04B2235/96C04B2235/9676
Inventor 郭钰龙周胜强张晗赵伟颜浩任林刘靖轩刘丽赵现堂
Owner 北京利尔高温材料股份有限公司
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