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Refractory composition for pure hydrogen atmosphere high temperature furnace

A high-temperature furnace and composition technology, applied in the field of refractory materials, can solve the problems of limited use field, poor chemical stability, etc., and achieve the effects of strong practical value and significance, large thermal conductivity, and low thermal expansion coefficient.

Inactive Publication Date: 2012-10-10
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the multi-component mineral composition of the material, the chemical stability is poor, and the application field is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] components Example 1 Example 2 Example 3 Example 4 Silica fume 10 17 22 30 Micropowder grade high titanium slag 0.05 2 4.5 1.0 Aluminum powder 0.05 0.5 1 toner 1.5 1.5 La 2 o 3 2 0.5 1 Y 2 o 3 1.0 2 Silicon Nitride Bonded Silicon Carbide 61 50 30 25 Fused green silicon carbide 8.9 20 25 Sintered Silicon Nitride 15 3.5 30 14 Sodium silicate 0.5 0.5 Aluminum oxide 0.5 1 2 sodium sulfate 1 0.25 sodium bisulfate 2 2 Aluminum phosphate 1 2 petroleum coke 1 2 0.25 Phenolic Resin 1 1 2

[0019] According to the above formula, the refractory bricks made by batching, kneading, machine pressing, baking, and nitriding sintering were tested under the ambient atmosphere conditions of the silicon steel high-temperature ring furnace, that is, the temperature in the furnace is 1300 °C,...

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PUM

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Abstract

The invention relates to a high temperature heat treatment furnace, especially relates to a refractory composition for a pure hydrogen atmosphere high temperature furnace. The refractory composition is prepared by letting raw materials be subject to mixing, high-pressure forming and high temperature nitridation sintering, wherein the raw materials comprise 10-30 % of silicon powder, 0.1-5 % of medium-low temperature sintering agent, 1-10 % of binder, and the balance of refractory aggregate. The Si3N4-conjugated silicon carbide refractory material provided by the invention can be used in pure hydrogen atmosphere at the ambient temperature of higher than 1300 DEG C.

Description

technical field [0001] The invention relates to a refractory material, in particular to a refractory composition for a metallurgical high-temperature furnace. Background technique [0002] The high-temperature ring furnace is the main process and equipment for silicon steel production. Since the ring furnace is a full-hydrogen atmosphere and the temperature is as high as 1200°C, the refractory support of the trolley is seriously damaged due to the long-term bearing of the weight of the steel coil. The performance of high-strength high-alumina brick refractory materials currently in use is easy to deteriorate during use, resulting in large deviations in the flatness and levelness of the hearth supporting the steel coil, resulting in a significant increase in steel coil defects, such as strip steel will produce a lot of "compression" "mark" defect and "elephant foot" defect, etc., the trimming amount of grain-oriented silicon steel has increased significantly, the amount of wa...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 齐晓青王永萍高立朱佩键励军沈伟国鲍戟范长刚
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE