攀钢采矿废石中重金属的溶出规律及环境效应

通过静态浸泡试验考察攀钢采矿废石中V、Ti、Cr、Fe 4种重金属在不同pH和浸泡时间下的溶出情况，为矿山环境的治理提供参考。结果表明：V和Cr的溶出量总体上随着pH值的上升而增大，Fe的溶出量与此相反，而Ti的溶出量在酸性和碱性条件下都很小；随着浸泡时间的延长，4种重金属的溶出量均发生无规律的波动，其原因有待进一步研究。在废石中含量高的重金属，其溶出率不一定大。4种重金属的溶出强度总体上均随着浸泡时间的延长而下降；从溶出强度判断，V和Ti具难溶出性，Cr具弱到难溶出性，Fe具中等到强溶出性。Cr可能对环境造成危害，需对其加强监测，其余3种重金属对环境影响不大。

Research on Leaching Rule of Heavy Metals in Mined Waste-rocks in Pansteel and its Impact on the Environment

Through static leaching experiments, the leaching situation of four heavy metals V，Ti，Cr，Fe in waste-rocks during mining process of Pansteel under the conditions of different pH values and different immerse time was investigated.The results showed that: The leaching volume of V and Cr was overall increasing with the increase of pH value, but Fe leaching was just in reverse.Ti leaching was tiny in acidic and alkaline conditions.The leaching volumes of four heavy metals were changing irregularly with the extension of immerse time, but the reason for this needs further study.Heavy metals in high concentration in waste-rocks does not mean large leaching rate.The leaching intensity of four heavy metals all gradually decreases with the extension of immerse time.By judging its leaching strength, it is concluded that V and Ti owns an insoluble nature, Cr has a weak soluble-insoluble nature, and Fe has a moderate-strong soluble nature.Cr may harm to the environment, which needs to be monitored.The other three heavy metals have little effect on the environment.