Extraction of metals from complex sulfide nickel concentrates by low-temperature chlorination roasting and water leaching  

作　　者：Cong Xu Hong-wei Cheng Guang-shi Li Chang-yuan Lu Xiong-gang Lu Xing-li Zou Qian Xu 

机构地区：[1]State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2017年第4期377-385,共9页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Key Basic Research Program of China(No.2014CB643403);the National Science Fund for Distinguished Young Scholars(No.51225401)

摘　　要：The recovery of valuable metals from complex sulfide concentrates was investigated via chlorination roasting followed by water leaching. A reaction process is proposed on the basis of previous studies and the results of our preliminary experiments. During the process, various process parameters were studied, including the roasting temperature, the addition of NH4Cl, the roasting time, the leaching time, and the liquid-to-solid ratio. The roasted products and leach residues were characterized by X-ray diffraction and vibrational spectroscopy. Under the optimum condition, 95% of Ni, 98% of Cu, and 88% of Co were recovered. In addition, the removal of iron was studied in the water leaching stage. The results demonstrate that this process provides an effective approach for extracting multiple metals from complex concentrates or ores. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.The recovery of valuable metals from complex sulfide concentrates was investigated via chlorination roasting followed by water leaching. A reaction process is proposed on the basis of previous studies and the results of our preliminary experiments. During the process,various process parameters were studied,including the roasting temperature,the addition of NH_4 Cl,the roasting time,the leaching time,and the liquid-to-solid ratio. The roasted products and leach residues were characterized by X-ray diffraction and vibrational spectroscopy. Under the optimum condition,95% of Ni,98% of Cu,and 88% of Co were recovered. In addition,the removal of iron was studied in the water leaching stage. The results demonstrate that this process provides an effective approach for extracting multiple metals from complex concentrates or ores.

关 键 词：CALCINATION Chemicals removal (water treatment) CHLORINATION LEACHING Metal recovery Nickel Rare earths Sulfur compounds Temperature X ray diffraction 

分 类 号：TF815[冶金工程—有色金属冶金]