(1. 北京科技大學(xué) 土木與環(huán)境工程學(xué)院，北京 100083；
2. 金屬礦山高效開采與安全教育部重點實驗室，北京 100083)
摘 要: 采用以Acidithiobacillus ferrooxidans為主的混合菌，研究絹云母對微生物浸出黃銅礦的影響。結(jié)果表明，銅的浸出率隨著絹云母粒度的減小而增加，隨著絹云母質(zhì)量分?jǐn)?shù)的增加而呈先升高后降低的趨勢。在添加粒度為−33 μm、質(zhì)量分?jǐn)?shù)為5.0%的絹云母時，銅的最高浸出率為54.88%，比不添加絹云母時的銅浸出率提高了約12%，表明絹云母能促進黃銅礦的微生物浸出。絹云母的加入可使浸出體系pH值降低，最終pH值低于1.22。在浸出過程中，新生成的物質(zhì)主要是銨黃鐵礬，它覆蓋于黃銅礦的表面，對微生物浸出銅有一定的阻礙作用。
關(guān)鍵字: 微生物浸出；絹云母；黃銅礦；細(xì)菌；黃鐵礦；銨黃鐵礬
（1. School of Civil and Environment Engineering, University of Science and Technology Beijing,
Beijing 100083, China;
2. Key Laboratory for High-Efficient Mining and Safety of Metal Mines, Ministry of Education,
Beijing 100083, China）
Abstract:The effect of addition of sericite on bioleaching of chalcopyrite was investigated using mixed cultures of Acidithiobacillus ferrooxidans. The results show that the leaching rate of copper increases with the particle size of sericite decreasing, and the leaching rate of copper increases at first and then decreases with the mass fraction of sericite increasing. By using 5% (mass fraction) sericite with particle size of −33 μm, the highest leaching rate of copper is 54.88%, which is about 12% higher than that of the chalcopyrite bioleaching without sericite, and which indicates that the bioleaching of chalcopyrite can be promoted with the addition of sericite. The pH value of leaching system can be decreased by the addition of sericite, which is lower than 1.22 finally. The new compounds of ammoniojarosite is generated mainly in the bioleaching process, which cover the surface of chalcopyrite, and hinder the bioleaching of chalcopyrite to a certain extent.
Key words: bioleaching; sericite; chalcopyrite; bacteria; pyrite; ammoniojarosite
