The invention provides a method for producing green
silicon carbide FEPA F P, comprising the following steps in turn: sifting raw materials,
grinding, classifying by air flow, cleaning by water, classifying by water conservancy and
coating surface, filtering by pressure,
drying, calcining, sieving, packaging and warehousing. The invention uses a Raymond grinder for
grinding and an air flow classification device for
multiple classification, and classifies into products in different levels by water conservatory classification; in water conservatory classification, cladding materials are used asdispersant; in classification,
water pressure is stable, multi-level precision is improved by
siphon overflow classification, impurities in the crack of the micro
powder grains are fully evaporated by
calcination and
tempering in the later period of production, and the cracks can be healed by high-temperature
calcination. The production method in the invention greatly enhances product purity, increases crushing resistance of the grains in
grinding and
polishing, the grain
fineness distribution is even with no large grain and with excellent shape and good affinity to grinding liquid. The invention can produce various green
silicon carbide FEPA F P with grain size being less than 100mm.