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Pouring material of silicon carbide

A castable and silicon carbide technology, applied in the field of castables, can solve the problems of hexavalent chromium pollution of national environmental protection requirements, non-compliance, poor material toughness, etc., and achieve strong erosion resistance and erosion resistance, thermal conductivity and service temperature. Improved, good thermal shock resistance

Active Publication Date: 2013-07-31
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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AI Technical Summary

Problems solved by technology

Conventional chromium-containing refractory materials are widely used in waste incinerator linings due to their excellent slag resistance, but their high density and strength lead to poor toughness of the material, and hexavalent chromium pollution does not meet the national environmental protection requirements, so chromium refractories will gradually be replaced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0014] Embodiment 2 is different from Example 1 in that the weight percentages of the components of the main raw materials in the total weight of the main raw materials are 86% SiC, 2% Guangxi clay, 1.5% BN+B4C, 3.5% aluminate cement, and microsilica powder 3.5%, alumina powder 3.5%.

Embodiment 3

[0015] Example 3, the difference from Example 1 is that the weight percentages of the components of the main raw materials in the total weight of the main raw materials are 90% of SiC, 1% of Guangxi mud, 1% of BN+B4C, 3% of aluminate cement, and 1% of microsilica powder , Aluminum oxide powder 4%.

[0016] Conventional chromium-containing refractory materials are widely used in waste incinerator linings due to their excellent slag resistance, but their high density and strength lead to poor toughness of the material, and hexavalent chromium pollution does not meet the national environmental protection requirements, so chromium refractories will be gradually replaced. SiC refractories have excellent properties such as strong erosion resistance and erosion resistance, high wear resistance, good thermal shock resistance, and strong adaptability to acid-base atmospheres, so they are used in domestic waste incinerators and cement decomposition. The application prospect in the furn...

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Abstract

The invention discloses a pouring material of silicon carbide, which comprises SiC, Guangxi mud, aluminate cement, silicon micropowder, poly-carboxylic acid + wood calcium powder, carboxymethyl cellulose and alumina powder. The pouring material also comprises boron nitride + boron carbide and organic fibre. According to the product disclosed by the invention, a compound bonding agent which can beused for increasing the plasticity and the high-temperature performance of the material and various admixtures are added, the workability, the cohesiveness and the like of the material are effectively enhanced, and various indexes of the density, the strength, the heat conductivity, the use temperature and the like of the material are all improved greatly. According to the product, the raw material of high-purity SiC is adopted, the distribution of the particle size of the material is regulated by adding different antioxidants, the oxidation resistance of the SiC material is effectively enhanced, and the service life of the pouring material of the silicon carbide is prolonged.

Description

technical field [0001] The present invention relates to castables. Background technique [0002] With the continuous increase of the world's population and rapid economic development, the amount of urban garbage and industrial waste has increased dramatically, causing serious harm to the environment in which human beings live. Therefore, the disposal of garbage is an urgent problem to be solved. The traditional method of burying garbage not only takes up space, but also causes serious pollution of groundwater. The current methods of waste disposal include: biological treatment, heat treatment and so on. A comparative study of various waste disposal methods shows that there is no technology that can replace the incineration method. This method has the characteristics of large capacity reduction, timely treatment, high degree of harmlessness, and heat recovery. Due to the unstable combustion atmosphere due to the diversification of garbage, there are both acidic and alkalin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/565
Inventor 朱国平刘家祥朱锦和朱其良山国强
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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