Polyacrylamide can be used in the mining and processing of coal, gold, silver, copper, iron, zinc and lead, uranium, nickel, phosphorus, potassium, manganese, salt and other minerals and the processing of tailings(widely used in flotation and smelting processes)The application is improve the efficiency and recovery of solid-liquid separation which can strengthen the refining of pulp from dressing pant and water concentrator, increase the hydraulic transport concentration and return water conversion of tailing,it can increase the waste water treatment return rate by use polyacrylamide strengthen the sedimentation and refining from tailings improve the recovery of useful metals in wastewater and reduce wastewater discharge.