Abstract: The paper studies the operational parameters such as the feeding pressure,feeding latency,and blowing drying time of the through-flow filter.Based on production practice, the optimal operational parameters of the feeding pressure,feeding latency,and blowing drying time are decided to be 0.40 MPa,350 s,and 200 s respectively.Besides,industrial applications are carried out.The results show that compared to the conventional filter,the cyanide tailings grade is 0.03 g/t lower,and the water content is 7.1 percentage points lower in the through-flow filter.1 485 000 yuan/a can be saved for cyanide-containing wastewater treatment cost,422 400 yuan/a can be saved for sodium cyanide purchase,and 79 000 yuan/a can be saved for calcium oxide purchase.The application of the through-flow filter has achieved good economic and environmental benefits.