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Whisker self-bonded SiC refractory material and preparation method thereof

A refractory material and self-bonding technology, applied in the field of SiC refractory materials, can solve the problems of increasing the production cost of self-bonding SiC materials, unsatisfactory service life, unreasonable particle matching, etc., and achieve excellent mechanical properties at abnormal temperature and high temperature, and slag erosion resistance Excellent performance and anti-oxidation performance, the effect of reducing energy consumption

Inactive Publication Date: 2019-03-08
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of existing technologies shows that self-bonding SiC refractory materials generally have problems such as poor bonding strength between aggregates and between aggregates and matrix, unreasonable particle matching and high preparation temperature, which improves the performance of self-bonding SiC materials. Production cost, and service life is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A whisker self-bonded SiC refractory material and a preparation method thereof. The preparation method described in this embodiment is:

[0024] Step 1. According to the mass ratio of catalyst:water (10-25):100, the catalyst and water are mixed, and magnetically stirred for 30-60 minutes to obtain a catalyst solution.

[0025] Step 2. According to the mass ratio of protective agent: water (20-50): 100, the protective agent and water are mixed, and magnetically stirred at 70° C. for 90-150 min to obtain a protective agent solution.

[0026] Step 3, according to the mass ratio of the catalyst solution: the protective agent solution is (1-25): 100, the catalyst solution and the protective agent solution are mixed, and magnetically stirred for 30-60min to obtain the protective agent-containing catalyst solution.

[0027] Step 4: According to the mass ratio of expanded graphite: silicon powder (30-35): 100, the expanded graphite and the silicon powder are mixed, and ball m...

Embodiment 2

[0034] A whisker self-bonded SiC refractory material and a preparation method thereof. The preparation method described in this embodiment is:

[0035] Step 1. According to the mass ratio of catalyst:water (15-30):100, the catalyst and water are mixed, and magnetically stirred for 30-60 minutes to obtain a catalyst solution.

[0036] Step 2. According to the mass ratio of protective agent: water (30-60): 100, the protective agent and water are mixed, and magnetically stirred at 70° C. for 90-150 min to obtain a protective agent solution.

[0037] Step 3. According to the catalyst solution: the mass ratio of the protective agent solution is (10-30): 100, the catalyst solution and the protective agent solution are mixed, and magnetically stirred for 30-60 minutes to obtain the protective agent-containing catalyst solution.

[0038] Step 4: According to the mass ratio of expanded graphite: silicon powder (33-38): 100, the expanded graphite and the silicon powder are mixed, and ...

Embodiment 3

[0045] A whisker self-bonded SiC refractory material and a preparation method thereof. The preparation method described in this embodiment is:

[0046] Step 1. According to the mass ratio of catalyst:water (20-35):100, the catalyst and water are mixed, and magnetically stirred for 30-60 minutes to obtain a catalyst solution.

[0047] Step 2. According to the mass ratio of protective agent: water (40-70): 100, the protective agent and water are mixed, and magnetically stirred at 70° C. for 90-150 min to obtain a protective agent solution.

[0048] Step 3, according to the mass ratio of the catalyst solution: the protective agent solution is (15-35): 100, the catalyst solution and the protective agent solution are mixed, and magnetically stirred for 30-60 minutes to obtain the protective agent-containing catalyst solution.

[0049]Step 4: According to the mass ratio of expanded graphite: silicon powder (36-41): 100, the expanded graphite and the silicon powder are mixed, and b...

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Abstract

The invention relates to a whisker self-bonded SiC refractory material and a preparation method thereof. The technical scheme of the invention is that: a catalyst and water are mixed and magneticallystirred to obtain catalyst solution; a protective agent and water are mixed and stirred to obtain protective agent solution; the catalyst solution and the protective agent solution are mixed and magnetically stirred to obtain catalyst solution containing the protective agent; expanded graphite and silicon powder are mixed and ball-milled to obtain composite powder; the composite powder is impregnated in the catalyst solution containing the protective agent, and after drying, composite powder impregnated with the catalyst is obtained; the composite powder impregnated with the catalyst and silicon carbide particles are mixed, and the mixture is subjected to mixed milling, ageing and compression moulding to prepare a green body; the green body is subjected to thermal treatment for 2 to 4h inan argon atmosphere under the condition of 1,200 to 1,400 DEG C to prepare the whisker self-bonded SiC refractory material. The whisker self-bonded SiC refractory material is low in production cost, low in reaction temperature and environmental-friendly; the obtained product is excellent in mechanical property, slag corrosion resistance and oxidation resistance.

Description

technical field [0001] The invention relates to the technical field of SiC refractory materials. In particular, it relates to a whisker self-bonded SiC refractory material and a preparation method thereof. Background technique [0002] Self-bonding SiC is a silicon carbide material with β-SiC as the binding phase. It has the advantages of good thermal conductivity, high thermal stability, no deformation, no softening and no loose expansion under high temperature for a long time. It is used as a flame shield in In high-temperature kilns, it can significantly increase the furnace temperature, save energy, increase production and improve economic benefits. At the same time, it also has good wear resistance and corrosion resistance, and is widely used in high-temperature structural components, such as blast furnace tuyeres, ceramic cups, non-ferrous smelting kilns and waste incinerators. Such as the lining of large blast furnaces in Japan (Li Hongxia. Refractory Handbook [M]. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/66
CPCC04B35/806C04B35/66
Inventor 张海军王慧芳张少伟毕玉保李赛赛
Owner WUHAN UNIV OF SCI & TECH