黄铜矿和黄铁矿微生物浸出差异性研究

Study of the Differences between Chalcopyrite and Pyrite Bioleaching

采用搅拌浸出法,搅拌转速350 r/min、搅拌温度45℃,使用相同菌种对黄铜矿与黄铁矿浸出差异性进行了研究。结果表明,在相同生物浸出条件下,黄铁矿较黄铜矿更易浸出。黄铜矿生物浸出后期,浸出速率减慢的决定因素并非黄钾铁矾钝化层的罩盖。两种矿物浸出差异性产生的根本原因在于由其自身晶体结构所决定的生物浸出机理不同。

This experimental studied the differences between chalcopyrite and pyrite agitation bioleaching,use the same microorganism,at 350 r / min,45 ℃. Analysis of the results showed that,in the same bioleaching conditions,pyrite is easier bioleached than chalcopyrite. The determinant factor cause the oxidation rate of chalcopyrite gear down,is not the produce of jarosite at the end of leaching. What give rise to the differences between chalcopyrite and pyrite bioleaching is their crystal structure, which lead to the different leaching mechanism.