What are the methods for determining the pulverization size?

The trace components used in the feed require a small particle size and require microscopic or laser particle size distribution to determine the particle size. Other feeds are generally determined by sieving. At present, there are four methods for particle size determination and representation of feed products used in China: three-layer sieve method, four-layer sieve method, eight-layer sieve method and fifteen-layer sieve method. The three-layer sieve method uses the "all pass" indicator to indicate the size of the particles, and the "sand on the sieve is not greater than" one to identify the uniformity of the material. The method is simple and easy, but it is relatively extensive, and the feed standard lacks sufficient experimental basis, which is feasible for compound feed. Other assays need to be performed in the laboratory. rEg China Feed Industry Information Network - based on feed, serving animal husbandry