铅锌矿选矿废水处理与回用试验研究

Study on Treating and Recycling of Wastewater from a Lead-Zinc Mineral Processing Plant

用聚合硫酸铁(PFS)、聚合氯化铝(PAC)和明矾3种混凝剂对铅锌选矿废水进行了处理,试验结果表明聚合氯化铝效果较佳,当用量(以铝计)为40 mg/L,Pb2+去除率可达87.14%,而废水中具有还原性的有机浮选药剂的去除率只有20.25%,在混凝沉降的基础上采用活性炭吸附进一步去除废水中残留的浮选药剂,当活性炭用量为100 mg/L时,Pb2+去除率为93.24%,浮选药剂的去除率可达56.32%。将处理过的废水进行铅锌浮选试验,试验结果表明废水采用混凝沉降—吸附工艺处理后的浮选指标与清水相当,表明该工艺处理后的废水可用于浮选生产。

Treatment of lead-zinc mineral processing wastewater using polymeric ferric sulfate （PFS）, polymeric aluminium （PAC） and Alum as coagulants has been studied.The results show that PAC is a better coagulant for treatment of wastewater.At the dosage of total Aluminum 40 mg/L, the removal rate of Pb2＋ is up to 87.14%, while the removal rate of organic flotation reagents is only 20.25%. After treating Coagulating sedimentation, the activated carbon is adopted to adsorb the organic pharmaceutical residues in wastewate~ When activated carbon at the dosage of 100 rag/L, the removal rate of Pb2~ and organic content is up to 93.24% and 56.32% respectively. The treated wastewater is recycled to float lead-zinc minerals. The flotation results show that the effect of flotation using the treated water, which is treated by the method of coagulating sedimentation-activated carbon adsorption, is almost the same as using fresh water, so the treated wastewater can be used in the production of floatation.