Method for granulating and forming silicon carbide fine powder and silicon carbide granule

Abstract

The invention relates to a method for granulating and forming silicon carbide fine powder and a silicon carbide granule. The method comprises the following steps of: 1, selecting the silicon carbide fine powder; 2, preparing adhesive solution; 3, mixing the silicon carbide fine powder which is obtained in the step 1 and the adhesive solution which is obtained in the step 2 according to a mass ratio of 10: 1-2:1; and 4, granulating and forming the mixture which is obtained in the step 3 by using mechanical granulating equipment. The invention provides the method for granulating and forming the silicon carbide fine powder, which has the advantages that furnace jet and furnace explosion can be prevented, the utilization ratio of the silicon carbide fine powder is high, the energy consumption is low, the degree of the environment pollution is low and the operation is simple and convenient, and the silicon carbide granule.

Description

technical field [0001] The invention belongs to the field of material preparation, and relates to a molding method of granular materials, in particular to a granulation molding method of silicon carbide fine powder and silicon carbide particles. Background technique [0002] In the production and application of silicon carbide, there will be great waste in two aspects: First, in the process of processing silicon carbide crystal blocks into abrasives, especially in the processing of solar wafer cutting blades, 40% of the raw materials will be generated Above fine powder; The 2nd, can produce a large amount of used waste green silicon carbide cutting material fine powders in the cutting process of solar wafer. Except for a very small amount of these fine powders that can be used reasonably, most of them are used to be processed into lower-grade refractory materials. During the production process of silicon carbide, its basic reaction is: SiO 2 +3c=Sic+2CO-498kJ, because sili...

AI Technical Summary

Problems solved by technology

However, if silicon carbide fine powder is directly added during silicon carbide smelting, the carbon monoxide gas generated during silicon carbide smelting will not be able to be discharged smoothly, which will easily cause furnace blasting or explosion.

At present, for the sake of safety, silicon carbide production enterprises can only add a very small amount of silicon carbide fine powder during silicon carbide smelting, resulting in great waste

At the same time, because silicon carbide fine powder is easy to adhere to the weighing hopper and conveyor belt, it will cause batching errors and reduce product quality.