Concurrent refining process for silicon carbide and graphite

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...

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