Research on Experimental and Application for the High Efficient Enrichment of the Low-grade Precious Metal Materials  

作　　者：FAN Xingxiang FU Guangqiang DONG Haigang WU Yuedong LIU Yang ZHAO Jiachun WU Xiaofeng LI Bojie TONG Weifeng 

机构地区：[1]State key Laboratory of Advanced Technology of Comprehensive Utilization of Platinum Metals,Kunming Institute of Precious Metals,Kunming 650106,China

出　　处：《贵金属》2012年第A01期11-17,共7页Precious Metals

基　　金：The National Basic Research Program( 973 Plan) of China(2012CB724201)

摘　　要：On the basis of reviewing the progress in the high efficient enrichment from secondary resources of low grade precious metals at home and abroad, a process route of the high efficient enrichment precious metals from secondary resources of low-grade metals by adding iron oxide as the trapping agent, reducing agent, additive, mixing uniformly and grinding, pelletizing, reduction, grinding and separation, and selectively acid leaching iron has been put forward in this paper. The experiments of reduction, grinding and separation, and selectively acid leaching iron were carried out mainly. Under the decided experiment parameters and conditions, iron generated during the reduction can trap precious metals during reduction, high active alloy powders were obtained from the reduced products by grinding and separation, the concentration of precious metals was obtained by acid leaching high active alloy powders. The better enrichment effect was obtained by adopting the technical route of processing. Other low grade noble metal materials and enrichment ratio of precious metals from the materials to acid products was high through acid leaching. This process has the advantages of simple process, environmental-friendly, strong adaptability of raw materials, high concentration ratio, which was regarded as a kind of the general efficient enrichment technology of low grade precious metal materials.On the basis of reviewing the progress in the high efficient enrichment from secondary resources of low-grade precious metals at home and abroad, a process route of the high efficient enrichment precious metals from secondary resources of low-grade metals by adding iron oxide as the trapping agent, reducing agent, additive, mixing uniformly and grinding, pelletizing, reduction, grinding and separation, and selectively acid leaching iron has been put forward in this paper. The experiments of reduction, grinding and separation, and selectively acid leaching iron were carried out mainly. Under the decided experiment parameters and conditions, iron generated during the reduction can trap precious metals during reduction, high active alloy powders were obtained from the reduced products by grinding and separation, the concentration of precious metals was obtained by acid leaching high active alloy powders. The better enrichment effect was obtained by adopting the technical route of processing. Other low grade noble metal materials and enrichment ratio of precious metals from the materials to acid products was high through acid leaching. This process has the advantages of simple process, environmental-friendly, strong adaptability of raw materials, high concentration ratio, which was regarded as a kind of the general efficient enrichment technology of low grade precious metal materials.

关 键 词：low-grade precious metals secondary resources the high efficient enrichment REDUCTION grinding and separation acid leaching 

分 类 号：TF83[冶金工程—有色金属冶金]