Gold is a rare metal, and gold symbolizes wealth and nobleness. It is also the sustenance of love.

The content of gold in ore is very low, and to extract and collect gold, it is generally to crush and grind the ore, and adopt appropriate methods to enrich the gold in the ore and separate it from the ore. Now withdrawing gold generally adopts re-election and flotation. No matter which method is used to extract gold, a large amount of water is needed. The mining industry is a large water user, and the wastewater composition is complex. Most of the wastewater is acidic, has a large amount of suspended solids, has a high content of heavy metals, and contains a large amount of cyanide. Handling is very difficult. For the characteristics of wastewater, it is generally treated by neutralization plus flocculation.

Since the wastewater is acidic, the treatment is relatively difficult. It is better to add the acid in the waste water to the waste water to make the pH value to about 7, so that the wastewater treatment is relatively easy and the effect is good. Then, PAM is added to flocculate, and the suspension of PAM forms a large floc by the adsorption bridging action of PAM, accelerates sedimentation, and functions to remove suspended matter, heavy metals and harmful substances.