Cu-state evolution during leaching of bornite at 50 ℃  

斑铜矿在50℃浸出过程中的铜物相转化（英文）

作　　者：Cong-ren YANG Fen JIAO Wen-qing QIN 杨聪仁;焦芬;覃文庆(中南大学资源加工与生物工程学院,长沙410083)

机构地区：School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2018年第8期1632-1639,共8页中国有色金属学报（英文版）

基　　金：Project(2016RS2016) supported by the Hunan Provincial Science and Technology Leader(Innovation Team of Interface Chemistry of Efficient and Clean Utilization of Complex Mineral Resources),China;Project supported by the Co-innovation Centre for Clean and Efficient Utilization of Strategic Metal Mineral Resources,China;Project(2015CX005) supported by the Innovation Driven Plan of Central South University,China

摘　　要：The bioleaching of bornite with mixed moderately thermophilic culture at 50 °C was investigated. The intermediary species formed during the leaching of bornite were characterized by XRD and XPS. In addition, the evolution of Cu-state during leaching of bornite was further studied by applying φh–p H diagram and cyclic voltammetry. The results showed that the bornite was more likely to be leached at high redox potential. Furthermore, the intermediary sulfides, such as isocubanite, covellite, chalcopyrite, disulfide, and polysulfide, were formed in the course of bornite dissolution. The Cu 2 p photoelectron spectrum revealed that the valence of copper in bornite and intermediary sulfide formed in the dissolution of bornite is ＋1. The bornite and chalcopyrite can be converted into each other, and both can be further converted to covellite and/or chalcocite.研究斑铜矿在50°C的混合中等嗜热微生物浸出。通过XRD和XPS表征在斑铜矿浸出过程中形成的中间产物,并利用φh-p H图和循环伏安曲线进一步分析斑铜矿浸出过程中铜状态的转化。结果表明:较高的溶液(氧化还原)电位更有利于斑铜矿的浸出;在斑铜矿的浸出过程中可能形成方黄铜矿、铜蓝、黄铜矿以及二硫化物和多硫化物等中间产物;Cu 2p光电子能谱显示,斑铜矿和中间产物中铜的价态均为+1。斑铜矿和黄铜矿之间可以相互转化,并且两者都可以进一步转化为铜蓝和/或辉铜矿。

关 键 词：LEACHING bomite CHALCOPYRITE COVELLITE Cu-state evolution 

分 类 号：TF811[冶金工程—有色金属冶金]