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Silicon carbide wear-resistant castable

A technology of silicon carbide and castables, which is applied in the field of silicon carbide wear-resistant castables, can solve problems such as poor corrosion resistance, poor wear resistance and thermal shock stability, and cannot meet the production requirements of high-temperature large-scale boilers. Good anti-corrosion effect

Inactive Publication Date: 2015-09-16
YIXING XINGBEI REFRACTORIES PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the production cost of this type of refractory castable is low, it has poor corrosion resistance, poor wear resistance and thermal shock stability, and low compressive strength, which cannot meet the production requirements of high-temperature large boilers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Silicon carbide wear-resistant castables, including the following raw materials, in parts by weight, 70 parts of white corundum, 13 parts of silicon carbide, 7 parts of activated α-alumina micropowder with a particle size of ≤2 μm, 2 parts of spinel, and 3 parts of micro-silicon fume, 3 parts of pure calcium aluminate cement, 3 parts of sodium tripolyphosphate, 0.5 part of sodium hexametaphosphate.

Embodiment 2

[0011] Silicon carbide wear-resistant castables, including the following raw materials, in parts by weight, 80 parts of white corundum, 15 parts of silicon carbide, 5 parts of activated α-alumina micropowder with a particle size of ≤2 μm, 3 parts of spinel, 4 parts of micro-silicon fume, 3 parts of pure calcium aluminate cement, 1 part of sodium tripolyphosphate, and 1 part of sodium hexametaphosphate.

Embodiment 3

[0013] Silicon carbide wear-resistant castables, including the following raw materials, in parts by weight, 75 parts of white corundum, 10 parts of silicon carbide, 4 parts of activated α-alumina micropowder with a particle size of ≤2 μm, 2 parts of spinel, and 5 parts of micro-silicon fume, 2 parts of pure calcium aluminate cement, 2 parts of sodium tripolyphosphate, and 0.7 part of sodium hexametaphosphate.

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PUM

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Abstract

The invention belongs to the technical field of amorphous refractory castables, and particularly relates to a silicon carbide wear-resistant castable which is prepared from the following raw materials in parts by weight: 70-80 parts of white alundum, 10-15 parts of silicon carbide, 4-7 parts of active alpha-aluminum oxide micropowder with the particle size of at most 2 mu m, 2-3 parts of spinel, 3-5 parts of silicon micropowder, 2-3 parts of pure calcium-aluminate cement, 1-3 parts of sodium tripolyphosphate and 0.5-1 part of sodium hexametaphosphate. The silicon carbide wear-resistant castable provided by the invention is used for boilers, and has the advantages of favorable corrosion resistance, favorable wear resistance and favorable fire resistance.

Description

technical field [0001] The invention belongs to the technical field of unshaped refractory castables, in particular to silicon carbide wear-resistant castables. Background technique [0002] The high-temperature gas erodes and scours the working lining of the furnace, causing damage to the furnace body. The main reason is that the existing wear-resistant castables are mainly composed of bauxite, high-aluminum powder, and coke gemstones. Although the production cost of this type of refractory castable is low, it has poor corrosion resistance, poor wear resistance and thermal shock stability, and low compressive strength, which cannot meet the production requirements of high-temperature large-scale boilers. Contents of the invention [0003] The invention aims to overcome the shortcomings of the prior art and provide a wear-resistant pouring material with good wear resistance and high thermal shock stability. [0004] The specific technical solutions are: [0005] Silicon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张晟张卫星许英王晓杰常伟峰
Owner YIXING XINGBEI REFRACTORIES PROD
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