Antioxidant low-carbon magnesia carbon brick and preparation method thereof

A carbon-magnesium-carbon brick and anti-oxidation technology, applied in the field of refractory materials, can solve the problems of low high-temperature flexural strength of magnesia-carbon bricks, and achieve high thermal shock stability, improved slag corrosion resistance, and good oxidation resistance. Effect

Inactive Publication Date: 2022-03-15
北京利尔高温材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the Chinese patent whose publication number is CN110436891A discloses a low-carbon magnesia-carbon brick for ladle slag line and its preparation method. The oxidation of the magnesia-carbon brick is suppressed by adding antioxidants such as Al powder and Si powder. However, the resulting magnesia-carbon brick The high temperature flexural strength of bricks is still low and needs to be further improved

Method used

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  • Antioxidant low-carbon magnesia carbon brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A low-carbon magnesia-carbon brick with excellent oxidation resistance described in this example, calculated in parts by mass, its preparation raw materials include the following components:

[0037] 27 parts of fused magnesia with a particle size of 3-5 mm, 30 parts of fused magnesia with a particle size of 1-3 mm, 18 parts of fused magnesia with a particle size of 0.088-1 mm, and 20 parts of particles with a particle size of less than 0.088 mm parts; metal aluminum powder 1 part; phenolic resin 3 parts; B 4 1 part of C-TiN composite material; 1 part of high-temperature pitch; 2 parts of graphite.

[0038] Among them, B 4 B in C-TiN composite material 4 The volume fraction of iC is 26%; the volume fraction of TN is 74%;

[0039] The content of magnesium oxide in fused magnesia is ≥97%;

[0040] In metal aluminum powder, the aluminum content is ≥98%;

[0041] In high-temperature asphalt, the carbon content is ≥60%;

[0042]The viscosity of phenolic resin is 15000-...

Embodiment 2

[0049] A low-carbon magnesia-carbon brick with excellent oxidation resistance described in this example, calculated in parts by mass, its preparation raw materials include the following components:

[0050] 27 parts of fused magnesia with a particle size of 3-5 mm, 30 parts of fused magnesia with a particle size of 1-3 mm, 18 parts of fused magnesia with a particle size of 0.088-1 mm, and 19 parts of particles with a particle size of less than 0.088 mm parts; metal aluminum powder 1 part; phenolic resin 3 parts; B 4 2 parts of C-TiN composite material; 1 part of high temperature pitch; 2 parts of graphite.

[0051] Among them, B 4 B in C-TiN composite material 4 The volume fraction of C is 26%; the volume fraction of TiN is 74%;

[0052] The content of magnesium oxide in fused magnesia is ≥97%;

[0053] In metal aluminum powder, the aluminum content is ≥98%;

[0054] In high-temperature asphalt, the carbon content is ≥60%;

[0055] The viscosity of phenolic resin is 1500...

Embodiment 3

[0062] A low-carbon magnesia-carbon brick with excellent oxidation resistance described in this example, calculated in parts by mass, its preparation raw materials include the following components:

[0063] 27 parts of fused magnesia with a particle size of 3-5 mm, 30 parts of fused magnesia with a particle size of 1-3 mm, 18 parts of fused magnesia with a particle size of 0.088-1 mm, and 20 parts of particles with a particle size of less than 0.088 mm parts; metal aluminum powder 1 part; phenolic resin 3 parts; B 4 2 parts of C-TiN composite material; 1 part of high-temperature pitch; 1 part of graphite.

[0064] Among them, B 4 B in C-TiN composite material 4 The volume fraction of C is 26%; the volume fraction of TiN is 74%;

[0065] The content of magnesium oxide in fused magnesia is ≥97%;

[0066] In metal aluminum powder, the aluminum content is ≥98%;

[0067] In high-temperature asphalt, the carbon content is ≥60%;

[0068] The viscosity of phenolic resin is 15000...

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Abstract

The invention provides a low-carbon magnesia carbon brick with excellent oxidation resistance and a preparation method thereof.The low-carbon magnesia carbon brick with excellent oxidation resistance is prepared from, by mass, 50-100 parts of fused magnesite, 0.5-10 parts of metal aluminum powder, 1-10 parts of phenolic resin, 0.5-10 parts of B4C-TiN multiphase material, 0.5-10 parts of high-temperature asphalt and 0.5-10 parts of graphite, and the low-carbon magnesia carbon brick with excellent oxidation resistance is prepared from, by mass, 50-100 parts of fused magnesite, 0.5-10 parts of metal aluminum powder, 1-10 parts of phenolic resin, 0.5-10 parts of B4C-TiN multiphase material, 0.5-10 parts of high-temperature asphalt and 0.5-10 parts of graphite. The low-carbon magnesia carbon brick with excellent oxidation resistance has good oxidation resistance and molten steel scouring resistance, is high in thermal shock resistance, and meets the smelting requirements of clean steel, ultra-low carbon steel and stainless steel.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a low-carbon magnesia-carbon brick with excellent oxidation resistance and a preparation method thereof. Background technique [0002] Magnesia-carbon bricks are basic refractory materials made of magnesia and carbon materials, using pitch or resin as a binder. Magnesia-carbon bricks have multiple advantages of high refractoriness of magnesia refractories and difficulty of being wetted by slag and molten steel because of their high refractoriness, strong resistance to slag erosion, and excellent thermal shock resistance. It is widely used in the iron and steel industry due to its characteristics, such as converter mouth, electric furnace slag line, ladle working layer and other harsh environments such as high temperature, severe mechanical erosion, and severe slag erosion. [0003] Although magnesia-carbon bricks have the above-mentioned many advantages,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/634
CPCC04B35/043C04B35/63496C04B35/63476C04B2235/402C04B2235/3886C04B2235/3821C04B2235/425C04B2235/5427C04B2235/5436C04B2235/96C04B2235/77
Inventor 宫磊佟晓松赵伟颜浩刘靖轩任林赵现堂徐双邵俊宁刘丽
Owner 北京利尔高温材料股份有限公司
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