Abstract: In Jiuquan Iron and Steel Company, the original concentrator with capacity of 6 500 000 t adopts the disc vacuum filter to treat iron concentrate, by which the cake moisture generally reaches 15.5%~16.0%, and sometimes even higher. A capacity of 4 000 000 t new concentrator in Jiusteel expected to control the cake moisture less than 13% in order to meet the needs of the sintering process. Based on the laboratory tests and semi-industrial tests, GPJ-120 disc press filter produced by Shandong Laiwu Coal Mining Machinery Co., Ltd. is adopted as filtration equipment to filter the concentrate. After putting into operation, the cake with moisture of 12.69% on average, dry basis average coefficient of 1.03 t/(m³·h), and filtrate solids content of less than 3% reaches the goal expected. Its successful application in 4 000 000 t new concentrator in Jiusteel indicates that it has a promotion potential in filtering the refractory metal minerals.

Key words: Disc press filter, Filter of iron ore concentrate, Cake moisture