Dissolution of polyacrylamide: The concentration of polyacrylamide is 0.1-0.3%. Non-iron containers should be used. Use clean water below 60°C, and sprinkle the flocculant slowly and evenly into the water while stirring, so that the flocculant is fully stirred in the container together with the water. It can be used after continuous stirring for 60 minutes. When the water temperature is too low, the stirring time can be extended. The linear speed of the stirring blade depends on the container. 2. Addition of polyacrylamide: Dilute the dissolved tailings water special flocculant with clean water, and use a concentration of 0.1-0.3%. Use a valve or a metering pump to control the flow rate and add it evenly to the tailings water (you can also directly prepare a solution with a concentration of 0.05-0.1%).