Comprehensive recovery of Fe,Zn,Ag and In from high iron-bearing zinc calcine  

作　　者：PENG Bing PENG Ning LIU Hui XUE Ke LIN Dong-hong 彭兵;彭宁;刘恢;薛珂;林冬红

机构地区：[1]Institute of Environmental Science and Engineering,School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China [2]Chinese National Engineering Research Centre for Control&Treatment of Heavy Metal Pollution,Changsha 410083,China

出　　处：《Journal of Central South University》2017年第5期1082-1089,共8页中南大学学报（英文版）

基　　金：Project(2014FJ1011)supported by the Major Science and Technology Project of Hunan Province,China;Project(51574295)supported by the National Natural Science Foundation of China

摘　　要：A beneficiation-metallurgy combination process is developed to recover Zn, Fe and to enrich In, Ag from high iron-bearing zinc calcine based on our former researches. In gaseous reductive roasting process, the roasting conditions were tested by magnetic separation of roasted product. It is found that the V_(CO)(P_(CO)/(P_(CO+CO_2)) in roasting atmosphere should be maintained below 30% to avoid the generation of zinc iron solid solution(Fe_(0.85-x)Zn_xO), which can bring a decrease of iron recovery in magnetic separation. After roasting, acid leaching and multistage magnetic separation are carried out for the recovery of Zn, Fe and enrichment of Ag and In. About 90% of zinc is extracted and 83% of iron is recovered in the whole process. The Ag mainly enters the tailings with a recovery of 76%, the Ag grade increases from 0.12 g/t in raw materials to 1.18 g/t in the tailings. However, the In mainly enters the iron concentrations and the recovery reaches 86%. This process was proved to be technically feasible and may be a favorable option in the treatment of high iron-bearing zinc material with high Ag or In content.A beneficiation-metallurgy combination process is developed to recover Zn, Fe and to enrich In, Ag from high iron-bearing zinc calcine based on our former researches. In gaseous reductive roasting process, the roasting conditions were tested by magnetic separation of roasted product. It is found that the V_(CO)(P_(CO)/(P_(CO+CO_2)) in roasting atmosphere should be maintained below 30% to avoid the generation of zinc iron solid solution(Fe_(0.85-x)Zn_xO), which can bring a decrease of iron recovery in magnetic separation. After roasting, acid leaching and multistage magnetic separation are carried out for the recovery of Zn, Fe and enrichment of Ag and In. About 90% of zinc is extracted and 83% of iron is recovered in the whole process. The Ag mainly enters the tailings with a recovery of 76%, the Ag grade increases from 0.12 g/t in raw materials to 1.18 g/t in the tailings. However, the In mainly enters the iron concentrations and the recovery reaches 86%. This process was proved to be technically feasible and may be a favorable option in the treatment of high iron-bearing zinc material with high Ag or In content.

关 键 词：HIGH iron-bearing zinc CALCINE reductive roasting multistage magnetic separation silver RECOVERY indium RECOVERY 

分 类 号：TF111[冶金工程—冶金物理化学]