Neutralizing-sedimentation with flocculation process for acid mine drainage treatment

At present, the neutralization and precipitation treatment is mostly applied in acid mine drainage treatment, which is widely used and with low running cost and so forth, but biggest problem is that the sediments float in the secondary settling tank and settle down difficultly, The paper researched that Cu²⁺, Fe³⁺, Al³⁺, Zn²⁺ in wastewater was precipitated by calcium and cation polymeric flocculants PAM, moreover discovered the condition of how to recycle the salts, the water quality of effluent could reach drainage discharge standard. X ray fluorescence analysis and AAS was used for testing salts in sediment and concentration of metal ion in supernatant, measurements improved the reliability and precision in the experiment. The experimental results provided application and research foundation for drainage treatment in nonferrous metal mines.