2023-04-18 The coal slime moisture of ultra-high pressure filter press can be reduced by 5% ~ 10% on average than that of ordinary plate frame type and diaphragm type filter press, and the calorific value can be increased by 1.26 ~ 2.09 MJ/kg, which can realize "no slime" production in coal preparation plant and solve the problem of coal slime outlet in coal preparation plant at the same time, but also achieve considerable economic benefits.