Concurrent refining process for silicon carbide and graphite

A technology of silicon carbide and graphite, which is applied in the chemical industry, can solve the problems of low energy utilization rate and large consumption, and achieve the effects of high recycling rate, high energy utilization efficiency and reduced production cost

Inactive Publication Date: 2012-06-27
朱胜利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its basic reaction is: SiO 2 +3C=SiC+2CO-498kJ, a large amount of heat energy converted from electric energy is consumed in production, and there is also the problem of low energy utilization rate

Method used

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Embodiment Construction

[0011] The invention provides a simultaneous refining process of silicon carbide and graphite. The process is basically similar to the traditional process, both adopting calcining. The difference is that during refining, the graphite core in the center of the silicon carbide calcining furnace is removed to reasonably enlarge the process. The space occupied by the original graphite core is filled with the conductive carbon core for the production of high-purity graphite and the petroleum coke or carbon coke added around the conductive carbon core. Graphite is smelted in the center of the calciner, and silicon carbide is smelted in the insulating layer of graphite.

[0012] Put a conductive carbon core in the center of the calciner, add 10-60cm of petroleum coke or carbon coke around the conductive carbon core, wrap the petroleum coke or carbon coke with a mixture of quartz sand and carbon, and the thickness of the package is 50-300cm. A multilayer sandwich structure is formed. ...

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Abstract

The present invention relates to a concurrent refining process for silicon carbide and graphite. The process comprises a step of reaction raw material adding, wherein the reaction raw materials comprise the raw material required for refining the graphite and the reaction raw material required for refining the silicon carbide, and the reaction raw material required for refining the silicon carbide is distributed around the raw material required for refining the graphite. The present invention provides a refining process with characteristics of low energy consumption, high energy utilization rate, simple process, convenient operation, and concurrent productions of the silicon carbide and the high purity graphite in a slightly modified silicon carbide calciner.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a material preparation method, in particular to a simultaneous refining process of silicon carbide and graphite. Background technique [0002] At present, the most commonly used method in the preparation of graphite is calcining. The conductive carbon core is placed in the center of the calcination furnace, and petroleum coke and / or coal coke are uniformly distributed around the conductive carbon core. During the calcination process at a high temperature of about 3000 ° C for 1 to 6 days, a lot of harmful gases (such as a large amount of carbon dioxide , carbon monoxide and waste gases harmful to the environment, etc.) while forming graphite crystals. The graphite crystals formed in this way are not only of low purity, but also require subsequent processing, which is complicated in technology. At the same time, the operation characteristics of this processing method cause a large a...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B31/36C01B32/205C01B32/956
Inventor 朱胜利袁逢宽赵新力
Owner 朱胜利
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