高浊度钼矿浮选废水的混凝沉淀

针对某钼矿选矿厂浮选废水,以PAC、PFS和FeCl3为凝聚剂,以APAM-A和APAM-N为絮凝剂,以H2SO4和NaOH为pH调整剂,研究了不同混凝剂、不同pH值和不同水力条件下废水处理后的浊度和COD。实验结果表明,在最佳水力条件下,原水pH不调整,以APAM-A为絮凝剂,以PAC为凝聚剂,其用量分别为15 g/t,750 g/t时,处理后上清液浊度为25 NTU,COD小于30 mg/L。浮选废水经处理后回用于选矿浮选流程,大大改善了选矿指标。

Coagulation of high turbidity flotation wastewater of molybdenum ore

The residual turbidity and COD of the wastewater with different coagulants, different pH value and different hydraulic conditions were examined, using PAC, PFS and FeCl₃ as coagulants, APAM-A and APAM-N as flocculants, H₂SO₄ and NaOH as pH regulators. The results show that the effects were optimum with the combination of 15 g/t APAM-A and 750 g/t PAC, and the pH value without regulation under the best hydraulic condition. The turbidity of the wastewater after treatment was 25 NTU, and COD was less than 30 mg/L. The treated wastewater was reused in the flotation and the mineral indexes were improved greatly.