The quality of so-called green silicon carbide micropowder is related to the demand. 1200 and 1500 are mesh numbers, and the larger the mesh number, the smaller the particles. If 1500 silicon carbide is needed, the center value should be 8.5 microns, and the quality depends on whether the particle size in this range is relatively concentrated.

Green silicon carbide micropowder refers to the material with fineness between #280 and #2500. The smaller the model, the coarser the particle size. For example, the median of # 1200 is about 9.5, and the median of # 1000 is about 1 1. The production process of green silicon carbide, a new material of Jinmeng, is one of silicon carbide micropowder.

(1) Take silicon carbide raw materials, put them into a pulverizer for crushing, sieve them into silicon carbide particles not larger than 5mm, then shape them into silicon carbide particles not larger than 2mm with a molding machine, in which oval particles account for more than 80%, then wash them with acid to remove impurities, and dry them;

(2) grinding the dried silicon carbide particles into silicon carbide powder with d50=9.5- 1 1.5μm, wherein the main current of the mill is set to 65-75A, the fan flow is set to 40-50m3/min, and the rotating speed of the analyzer is set to 400-600rpm;

(3)

Then, the silicon carbide powder is classified by a vortex air classifier. When classifying, the fan flow rate of the vortex air classifier is 25-43m3/min, and the rotating speed of the classifying wheel is 2600-3300 rpm, from the finished product A with Kuchmod granularity ds94=6.5-5.5μm to the semi-finished product of the cyclone Kuchmod DS94 ≤ 5.5μ m.