微波活化预处理对黄铜矿加压浸出的影响

Effect of Microwave Activation Treatment on Pressure Leaching Behavior of Chalcopyrite

研究微波活化预处理保温时间和温度对黄铜矿加压浸出的影响,并采用X射线衍射和扫描电子显微镜表征微波活化处理前后黄铜矿及其浸出渣的形貌。结果表明,微波活化预处理保温时间越长,活化效果越好,最适宜的活化温度为100℃。微波活化处理能导致部分Cu-Fe-S和Fe-S键的去稳定化,并能在黄铜矿表面生成局部细小的裂缝与孔洞,从而促进黄铜矿的浸出。微波活化可以提高铜的浸出并且抑制铁的浸出。

Effects of microwave activation time and activation temperature on pressure leaching behavior of chalcopyrite were investigated.Chalcopyrite and its leaching residue before and after microwave activation treatment were characterized by XRD and SEM.The results show that activation effect is enhanced by elongation of activation time,and the optimum activation temperature is 100℃.Microwave activation treatment can lead to de-stabilization of Cu-Fe-S and Fe-S bonds.Local fine cracks and holes can be formed on surface of chalcopyrite,thus promoting leaching of chalcopyrite.Microwave activation treatment can improve copper leaching and inhibit iron leaching.