难浸金矿FeS2-FeAsS-KMnO4-H2O系的E-pH研究

摘要

通过热力学计算绘制了298.15 K条件下FeS2-FeAsS-KMnO4-H2O系的E-pH图，找出了较理想的KMnO4氧化FeS2和FeAsS的电位和pH预处理条件。实验表明，经高锰酸钾预处理后，包裹金的黄铁矿和毒砂被打开，这一结果为难浸金矿氧化预处理提供重要的理论参考。%The E-pH diagram of FeS2-FeAsS-KMnO4-H2O system in 298.15 K was drawn through thermodynamic calculations. The ideal pretreatment condition for pH and electric potential were found for KMnO4 oxidation FeS2 and FeAsS from the E-pH diagram. The result showed that the pyrite and arsenopyrite wrapped gold is opened through potassium permanganate pretreatment. This result may provide some theoretical criterion for oxidation pretreatment of refractory gold.