铅锌硫化矿浮选废水处理研究进展

 铅锌硫化矿浮选废水排放量大，含有毒物质重金属和浮选时所用的无机和有机浮选药剂及悬浮物等，且持续时间长，不易控制和治理，如直接排放则会对环境造成严重污染，而经过适当处理后，可以回用在选矿过程中，其选矿指标与清水基本一致。本文综述了浮选废水的来源、废水中有毒污染物及其对环境和人类健康的危害，重点介绍国内浮选废水净化与资源化所采用的治理方法，主要有混凝沉降、混凝沉降-活性炭吸附、混凝沉降-氧化、自然降解等。总结目前国内浮选废水处理所取得的成绩和其中的不足，展望今后处理技术的研究发展方向，提出了走选矿废水净化与资源化利用的道路，不仅可以清洁矿山，保护环境，还具有显著的经济效益和社会效益。

Advance in the Water Treatment of Pb-Zn Sulfide Ore Floatation Wastewater

The emission of Pb-Zn sulfide ore floatation wastewater, which would last for a long time and is not easy to control and treat, is huge, and usually contains heavy metals, inorganic or organic medications of floatation and suspended matters. The direct discharge of floatation wastewater would pollute and endanger the environment seriously. However, with proper treatment, it could be reused in an ore beneficiation process, with the ore beneficiation indexes basically the same as while using clear water, not only resulting in cleansing and protection of mine, but also with good economical and social benefits. In this paper, the origin and the environmental hazards of flotation wastewater, the situation of its purifying and comprehensive utilizing are discussed. At present, the methods of treatment mainly include the coagulative precipitation, the coagulative precipitation-activated carbon adsorption, and the coagulative precipitation-oxidation and the natural degradation. Finally, the achievements and problems in wastewater treatment in China are reviewed, and the future directions of research and development of wastewater treatment are put forward.