(东北大学 材料与冶金学院，沈阳 110819)
摘 要: 采用Fe(Ⅱ)和Fe(Ⅲ)对黄铜矿进行生物浸出，主要研究浸出过程中体系的pH值、铁离子浓度、细菌吸附率及铜浸出率变化规律。结果表明：介质中Fe(Ⅲ)含量不同，生成黄钾铁矾的形态不同。在Fe(Ⅲ)生物浸出体系中，絮状的黄钾铁矾逐渐生成并全部覆盖在黄铜矿表面，阻碍黄铜矿的浸出过程。在Fe(Ⅱ)生物浸出体系中，生成皮壳状、结核状的黄钾铁矾分散于浸出液中，不覆盖在黄铜矿表面，对黄铜矿的浸出没有阻碍作用。
关键字: 黄铜矿；黄钾铁矾；生物浸出；细菌吸附；水解
（School of Materials Science and Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:The chalcopyrite was bioleached using ferrous and ferric solution. The variations of main experimental parameters including the pH value, ferrous and ferric concentration, bacterial adsorption rate and copper leaching efficiency in the leaching solution were investigated. The results show that the ferric concentration can affect the morphologies of jarosite. As the flocculent jarosite gradually forms in the ferric bioleaching solution, the floccule jarosite forms and cover on the chalcopyrite surface, which prevents the leaching process. In the ferrous bioleaching solution, the crustose and nodulated jarosite is generated and dispersed in the solution, which cannot prevent the sequential dissolution of the chalcopyrite.
Key words: chalcopyrite; jarosite; bioleaching; bacterial adsorption; hydrolysis
