Abstract: Three different structure cyclone with diameter of 100mm are researched in the laboratory and the differences between multi-cone angle HHZ-cyclone and 100、200  standard cyclone are compared. Based on the result, the multi-cone angle HHZ150 cyclone used in industrial research is designed, and its parameters can be changed, and compared with CZ150 cyclone. The study proves that the multi-cone angle cyclone has a lower separation size, and can improve the yield of the underflow of cyclone and then produce more high-quality coarse filling tailings under the same diameter of cyclone and process conditions.

Key words: Backfilling, Cyclone, Separation size