(東北大學 材料與冶金學院，沈陽 110819)
摘 要: 采用Fe(Ⅱ)和Fe(Ⅲ)對黃銅礦進行生物浸出，主要研究浸出過程中體系的pH值、鐵離子濃度、細菌吸附率及銅浸出率變化規(guī)律。結(jié)果表明：介質(zhì)中Fe(Ⅲ)含量不同，生成黃鉀鐵礬的形態(tài)不同。在Fe(Ⅲ)生物浸出體系中，絮狀的黃鉀鐵礬逐漸生成并全部覆蓋在黃銅礦表面，阻礙黃銅礦的浸出過程。在Fe(Ⅱ)生物浸出體系中，生成皮殼狀、結(jié)核狀的黃鉀鐵礬分散于浸出液中，不覆蓋在黃銅礦表面，對黃銅礦的浸出沒有阻礙作用。
關(guān)鍵字: 黃銅礦；黃鉀鐵礬；生物浸出；細菌吸附；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
