黄金冶炼废水处理及有价金属回收

针对某金矿冶炼厂酸浸浓密机溢流水pH值较低和重金属离子浓度较高的特点，对比研究了膜处理法、离子交换树脂法和硫化沉淀法对黄金冶炼废水中Cu、Cd、Ni等金属离子的去除效果及水样中金回收的可行性。结果表明：使用膜技术处理溢流水时，浊水的金属及非金属离子含量增加了近一倍，但存在过滤速度慢的问题；采用树脂吸附水样中的As、Au效果不理想，其他含量较低的元素采用树脂吸附工艺可以达到较好的效果；硫化沉淀法效果较好，但是需结合充氧和活性炭吸附工段才能充分脱砷。3种工艺相结合可获得经济可行的废水排放及废水回用方案。

Gold Smelting Wastewater Treatment and Recovery of Valuable Metals

According to acid leaching with thickener overflow water at low pH and high concentration of heavy metal ions in certain gold smelter，we compared the results and feasibility of different methods including film processing method，ion exchange resin method as well as sulfide precipitation for removing Cu，Cd，Ni and other metal ions in waste water during gold smelting and recycling gold in water samples in this study. The results showed that metal and nonmetal ions content in muddy water was nearly double when applying the membrane technology to deal with the overflow of water，but filtration procedure was time-consuming on the whole；When resin adsorption method was employed to separate As，Au from water samples，we cannot obtain expected results，however，other elements with low content can be absorbed by resin effectively.The results of sulfide precipitation method were better than other mentioned methods，nevertheless，the method combined with oxygen，activated carbon adsorption section can sufficiently remove arsenic.Overall，it can be concluded that combination of the three methods is feasible economically for wastewater discharge and wastewater reuse in some gold smelters.