在细菌浸出黄铜矿的过程中,浸出速率缓慢的原因是矿物表面会形成一层阻碍矿物与浸出液之间物质交换的钝化膜,这层膜的组成会随着浸出的进行而变化.利用SEM,EDS,XRD和XPS等对细菌浸出黄铜矿的过程中,矿物表面的形貌、组成及物相变化进行了研究.结果表明,黄铜矿在细菌浸出过程中依次形成了缺铁铜硫化物Cul-xFe1-ySz(x＜y),单质硫晶体S0,氧化铁,羟基氧化铁和黄钾铁矾.由于浸矿混合细菌ASH-07对硫的氧化作用,硫化物层和单质硫层都是氧化膜形成过程中的中间产物,致密的黄钾铁矾层则对黄铜矿的浸出产生钝化作用
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