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A corrosion-resistant silicon carbide brick

A silicon carbide brick and corrosion-resistant technology, applied in the field of refractory materials, can solve the problems of high thermal conductivity, unfavorable energy saving and environmental protection, etc., and achieve the effects of low thermal conductivity, long service life and good corrosion resistance.

Inactive Publication Date: 2018-08-24
长兴中建耐火材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, it is found that the dissolution index of molten iron is still as high as 26%, and the thermal conductivity is relatively high, which is not conducive to energy saving and environmental protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The production process of corrosion-resistant silicon carbide bricks:

[0023] (1) Ingredients:

[0024] Prepare the following raw materials in parts by weight: 60 parts of silicon carbide micropowder (particle size: 15 μm), 3 parts of silicon carbide nanopowder (particle size: 60 nm), graphite powder (particle size: 25 μm): 5 parts, and the mass fraction is 99.9% of α- Al 2 o 3 0.9 parts of nano powder (particle size: 20nm), 1.1 parts of muscovite powder (particle size: 5 μm), hexagonal boron nitride powder (particle size: 50 μm): 2.8 parts, calcite powder (particle size: 120 μm);

[0025] After preparation, ball mill for 5 minutes to mix evenly;

[0026] (2) Kneading:

[0027] Put the mixed dry raw materials in a closed kneading pot and knead at 150°C for 15 minutes, then add 2 parts of resin, and knead under vacuum for 20 minutes;

[0028] (3) Sintering molding

[0029] The kneaded paste is poured into a mold, and then demoulded after natural drying. The dried ...

Embodiment 2

[0033] The production process of corrosion-resistant silicon carbide bricks:

[0034] (1) Ingredients:

[0035] Prepare the following raw materials in parts by weight: 69 parts of silicon carbide micropowder (particle size: 15 μm), 5 parts of silicon carbide nanopowder (particle size: 30 nm), 10 parts of graphite powder (particle size: 20 μm), and the mass fraction is 99.9% of α- al 2 o 3 0.9 parts of nano powder (particle size: 20nm), 0.8 parts of muscovite powder (particle size: 5 μm), hexagonal boron nitride powder (particle size: 50 μm): 2.8 parts, calcite powder (particle size: 120 μm);

[0036] After preparation, ball mill for 5 minutes to mix evenly;

[0037] (2) Kneading:

[0038] Put the mixed dry raw materials in a closed kneading pot for 15 minutes at a temperature of 150°C, then add 2 parts of resin, and carry out vacuum kneading for 25 minutes;

[0039] (3) Sintering molding

[0040] The kneaded paste is poured into a mold, and then demoulded after natural d...

Embodiment 3

[0044] The production process of corrosion-resistant silicon carbide bricks:

[0045] (1) Ingredients:

[0046] Prepare the following raw materials in parts by weight: 61 parts of silicon carbide micropowder (particle size: 15 μm), 4 parts of silicon carbide nanopowder (particle size: 40 nm), graphite powder (particle size: 24 μm): 6 parts, and the mass fraction is 99.9% of α- Al 2 o 3 0.9 parts of nano powder (particle size: 20nm), 1.0 parts of muscovite powder (particle size: 5 μm), hexagonal boron nitride powder (particle size: 50 μm): 2.8 parts, calcite powder (particle size: 120 μm);

[0047] After preparation, ball mill for 5 minutes to mix evenly;

[0048] (2) Kneading:

[0049] Put the mixed dry raw materials in a closed kneading pot for 15 minutes at a temperature of 150°C, then add 2 parts of resin, and carry out vacuum kneading for 21 minutes;

[0050] (3) Sintering molding

[0051] The kneaded paste is poured into a mold, and then demoulded after natural dryi...

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Abstract

The invention discloses a production process for a corrosion-resistant silicon carbide brick. The production process comprises the following steps: preparing the following raw materials in parts by weight: 60 to 69 parts of silicon carbide micro powder, 3 to 5 parts of silicon carbide nanometer powder, 5 to 10 parts of graphite powder, 0.9 parts of alpha-Al2O3 nanometer powder of which the mass fraction is 99.9 percent, 0.8 to 1.1 parts of white mica powder, 2.8 parts of hexagonal boron nitride powder and calcite in powder; moulding kneaded paste in a die by casting; demoulding after natural drying; sintering a dried wet green in an electric furnace. The silicon carbide brick produced by the production process disclosed by the invention has good corrosion resistance, is long in service life, low in heat conductivity coefficient and more energy-saving and environmental friendly.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a corrosion-resistant silicon carbide brick and a preparation process thereof. Background technique [0002] Silicon carbide brick is a refractory material made of SiC as the main raw material. Contains SiC72%~99%. Divided into clay bonded, Si3N4 bonded, Sialon bonded, β-SiC bonded, Si2ON2 bonded and recrystallized silicon carbide bricks. [0003] During the use of the blast furnace, the factor that is likely to cause serious damage to the lining of the middle and upper parts of the furnace body is the collapse caused by the loss of support of the middle and upper part of the furnace body when the bosh, furnace waist and lower part of the furnace body are severely eroded. Therefore, the improvement of the material of the lining material can resist the chemical erosion of gas and the abrasion of solid materials, so that there will be no intermediate main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/565C04B35/622
Inventor 朱晓明
Owner 长兴中建耐火材料科技有限公司
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