Abstract:There are different advantages and disadvantages of existing classifying/screening equipment. In order to improve the precision and efficiency of classification, it was invented that a kind of particle classifying equipment with swirling, high speeding and cylindrical characteristic structure, and it was named of Eddying Classification Column(ECC). The test results shown that the ECC had high classifying accuracy and efficiency. In the condition including sieve mesh was 0.35mm, the concentration was 35% and the axis speed was 1000r/min, when the feeding speed was 2kg/min, 3kg/min, and 4kg/min, the Equantity-350μm=Equality-350μm and reached 97.23%, 93.17% and 87.46% respectively. Under the same concentration, the classifying time was positively correlated with the quantity efficiency, under different concentrations, the classifying efficiency was not comparable. The prediction of the fitting curve shown that when the equivalent efficiency Equantity-350μm and Equantity -74μm were assumed to be 80%, the capacity can reach 5.0kg/min and 5.42kg/min, also the classifying time was 3.0min and 0.9min respectively. The experimental results shown that the horizontal sectional area(the effective area) and the effective classifying length of the ECC can be increased in order to increase processing rate and classifying efficiency.