Silicon carbide powder production process

Silicon carbide powder production steps are as follows:
Silicon carbide powder production process there are five main steps:
First, take the silicon carbide materials, through the crusher, and sieved to less than 5mm of silicon carbide particles, and then shaping machine shaping them to no more than 2mm of silicon carbide particles, and the particles of which accounted for 80 Oval % or more, performs, pickling to remove impurities, and then during drying
Second, milling, the dried particles of silicon carbide powder mill crushed into d50 = 9.5-11.5μm silicon carbide powder, crushed when the mill is set to host the current 65-75A, fan flow is set to 40-50m3/min, analysis machine speed of 400 - 600 rpm / min for milling process.
Third, grading, grading machine with vortex flow silicon carbide powder grading, grading, vortex flow fan air classifier is 25-43m3/min, classifier wheel rotational speed of 2600 - 3300 rev / min, from grading mouth ceded ds94 = 6.5-5.5μm particle size of the finished product A, cyclone separation ds94 ≤ 5.5μm mouth semi-finished products;
Fourth, the vortex type air classifier with cyclone mouth impeller semi separated gas stream classifier then re-classifying, grading, the impeller of the fan air flow classifier 25-10m3/min, classifier wheel rotation speed is 1300 - 1700 rev / min, separated from the particle size classification mouth ds94 = 4.5-3.0μm finished product B, then the separated product cyclone mouth. Fifth, testing, according to the standard detected in the production of silicon carbide powder is qualified.