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A kind of ultra-low carbon magnesia carbon brick with excellent performance and preparation method thereof

An ultra-low-carbon magnesia-carbon brick, an excellent technology, applied in the field of refractory materials, can solve the problems of increasing refractory material erosion, high thermal conductivity of materials, and increased porosity, so as to improve deformation, increase mechanical strength, and achieve low-carbon The effect of content

Active Publication Date: 2020-12-08
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

AI Technical Summary

Problems solved by technology

The carbon content of traditional magnesia carbon bricks is relatively high, and there are the following problems in the long-term application process: high carbon content, high thermal conductivity of the material, and high energy consumption; a large amount of carbon is oxidized at high temperature, resulting in increased porosity, A series of problems such as the erosion of refractory materials have been increased; when used as a lining material for a special refining furnace, it will cause carburization problems

Method used

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  • A kind of ultra-low carbon magnesia carbon brick with excellent performance and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] The ultra-low carbon magnesia-carbon brick with excellent performance described in this example is calculated according to the mass fraction, and its preparation raw materials include: 28 parts of fused magnesia 5-3 mm, 33 parts of fused magnesia 3-1 mm, fused magnesia Sand 1-0.074mm 16 parts, fused magnesia 0.074mm 18 parts, composite graphitized carbon black 1 part, liquid phenolic resin 2.5 parts, carbon / magnesium aluminum spinel composite powder 2 parts, metal aluminum powder 2 parts.

[0033] The preparation method of the ultra-low carbon magnesia carbon brick with excellent performance described in this embodiment comprises the following steps:

[0034] 1. Dry-mix the fused magnesia with a particle size of 5-3mm, the fused magnesia with a particle size of 3-1mm, and the fused magnesia with a particle size of 1-0.074mm for 1 minute according to the selected mass parts ;

[0035] 2. Then add liquid phenolic resin evenly and slowly for mixing, the adding speed of li...

Embodiment 2

[0041] The ultra-low carbon magnesia-carbon brick with excellent performance described in this example is calculated according to the mass fraction, and its preparation raw materials include: 28 parts of fused magnesia 5-3 mm, 33 parts of fused magnesia 3-1 mm, fused magnesia Sand 1-0.074mm 15 parts, fused magnesia 0.074mm 18 parts, composite graphitized carbon black 1 part, liquid phenolic resin 2.5 parts, carbon / magnesium aluminum spinel composite powder 2 parts, metal aluminum powder 2 parts.

[0042] The preparation method of the ultra-low carbon magnesia-carbon brick with excellent performance described in this example is the same as that in Example 1.

Embodiment 3

[0044] The ultra-low carbon magnesia-carbon brick with excellent performance described in this example is calculated according to the mass fraction, and its preparation raw materials include: 28 parts of fused magnesia 5-3 mm, 33 parts of fused magnesia 3-1 mm, fused magnesia Sand 1-0.074mm 16 parts, fused magnesia 0.074mm 17 parts, composite graphitized carbon black 1.5 parts, liquid phenolic resin 2.8 parts, carbon / magnesium aluminum spinel composite powder 2.5 parts, metal aluminum powder 2 parts.

[0045] The preparation method of the ultra-low carbon magnesia-carbon brick with excellent performance described in this example is the same as that in Example 1.

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Abstract

The invention provides an ultralow-carbon magnesia carbon brick with excellent performance, and a preparation method thereof. The ultralow-carbon magnesia carbon brick with excellent performance is prepared from, by mass, 70 to 110 parts of fused magnesia, 0.1 to 8 parts of composite graphitized carbon black, 0.5 to 8 parts of liquid phenolic resin, 0.1 to 8 parts of carbon / magnesium aluminate spinel composite powder and 0.1-8 parts of metal aluminum powder. Composite graphitized carbon black is added to form a nano-structure matrix in the magnesia carbon brick, nanopores can be generated in the carbonization process to improve deformation of the material caused by thermal expansion and shrinkage and increase the thermal shock stability of the material, the carbon / magnesium aluminate spinel composite powder contains extremely high ordered free carbon, addition of carbon of the low-carbon magnesium-carbon material can be reduced, and the problems that carbon of the low-carbon magnesium-carbon refractory material is difficult to disperse uniformly and prone to agglomeration are remarkably solved.

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 with excellent performance and a preparation method thereof. Background technique [0002] MgO-C refractory is an excellent carbon composite refractory with excellent erosion resistance and thermal shock resistance. The carbon content of traditional magnesia carbon bricks is relatively high, and there are the following problems in the long-term application process: high carbon content, high thermal conductivity of the material, and high energy consumption; a large amount of carbon is oxidized at high temperature, resulting in increased porosity, A series of problems such as the erosion of refractory materials have been increased; when used as a lining material for a special refining furnace, it will cause carburization. Therefore, with the needs of special steel smelting and the economical utilization of resource...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3222C04B2235/402C04B2235/422C04B2235/424C04B2235/77C04B2235/96C04B2235/9607
Inventor 张晗何枫郭钰龙颜浩赵伟任林刘靖轩赵现堂刘丽
Owner 北京利尔高温材料股份有限公司