Silicon carbide micropowder refers to the power size less than 100μm and is formed from lapping and grinding of silicon carbide block by Raymond mill, airflow mill, ball mill and shaper. Its application scope is getting wider and wider, and its demand is further increasing. Our company has successfully applied powder negative pressure conveying equipment to the production of silicon carbide powder, which contributes to lower cost and higher quality of silicon carbide. Vacuum feeder has developed specially for characteristics of high wear resistance, easy cleaning, and fast conveying speed of silicon carbide micropowder on the basis of improvement and optimization of negative pressure feeder in present market, and designed and successfully applied intelligent quantitative conveying function. Compared with traditional equipment, vacuum feeder adopts negative pressure to convey material, which greatly reduces dust during conveying and does good to improve the production environment of silicon carbide micropowder. It is suitable for cutting, lapping and grinding of solar silicon wafer, semiconductor silicon wafer and quartz silicon wafer; polishing of crystal and pure iron; precision polishing of ceramics and special steel; making bonded and coated grinding tools; Cutting, freedom grinding and polishing; also lapping and grinding of non-metal materials such as glass, stone, agate, jewelry and jade articles, as well as to make advanced refractory material, engineer ceramics, heating elements and thermal energy elements etc.