Method for classifying silicon carbide micro powder and classifying equipment of method

Abstract

The invention discloses a method for classifying silicon carbide micro powder and classifying equipment of the method, which belong to the technical field of classification of micro powder. The method mainly includes steps that the silicon carbide micro powder sequentially enters at least two classifying machines which are serially connected, each classifying machine is provided with a self-suction sealing device, the classifying precision of each downstream classifying machine is higher than that of the adjacent upstream classifying machine, a cyclone collector is connected with the tail-end classifying machine and collects sorted silicon carbide micro powder; a bag dust collector collects waste discharged from the cyclone collector, and a system is powered by an induced draft fan disposed on a downstream of the bag dust collector. By the aid of the method and the classifying equipment, technical problems that in the prior art, the classifying precision of silicon carbide micro powder is low, extraction rate of fine powder is low, distribution of granularities of finished products is wide are solved. In addition, the method and the classifying equipment are widely applied to finely classifying silicon carbide grains.

Description

technical field [0001] The invention relates to a solid powder grading method and a grading device, in particular to a silicon carbide micropowder grading method and grading equipment. Background technique [0002] Silicon carbide (molecular formula sic) is a compound product formed by using quartz sand and high-quality petroleum coke under the high temperature of a smelting electric furnace. It is widely used in industrial grinding tools, refractory materials, steel smelting, military aerospace and many other fields. The preparation process of silicon carbide agglomeration is as follows: the phenolic resin raw material and silicon powder are prepared into a powder precursor by the inclusion mixing process, and then carbonized and calcined to prepare submicron silicon carbide with good sphericity, narrow particle size distribution and uniformity Powder, the average particle size is about 0.1μm. The production process of submicron silicon carbide powder is that the silicon-p...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for grading silicon carbide micropowder to solve the technical problems of low grading accuracy of silicon carbide micropowder, low extraction rate of fine powder, and wide particle size distribution of finished products

[0006] Another technical problem to be solved by the present invention is to provide a silicon carbide micropowder grading equipment to solve the technical problems of poor sealing effect between the grading wheel and the machine body of the classifier and wide particle size distribution of the finished product

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