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An innovation technology for recovering silver and valuable metals from hazardous zinc leaching residue through direct reduction

文献类型：期刊论文

作者Yao, Guangzheng1,2; Guo, Qiang1,3,4; Li, Yongli1,3; Xu, Ziyang1,2; Han, Zhenpeng1,2; He, Mingming1; Qi, Tao1
刊名MINERALS ENGINEERING
出版日期2022-10-01
卷号188页码:10
ISSN号0892-6875
关键词Zinc leaching residue Direct reduction with sulfur One-step capture silver Valuable metals recovery
DOI10.1016/j.mineng.2022.107857
英文摘要Zinc leaching residue (ZLR) is a hazardous solid waste with complex phase composition, comprising high content of valuable metals, and sulfur. The extraction of silver is the key to harmless utilization of ZLR. In this paper, a short-flowsheet comprehensive recycling valuable metals method by direct reduction was proposed. During reduction, lead and zinc compounds were reduced to metallic state, which were volatilized and recovered in gas phase. Moreover, metallic iron in reduction product was recovered by magnetic separation. Silver was enriched in FeS phase, and it was beneficiated by flotation with hydrophobic FeS as carrier. Under the optimized conditions, silver concentrate with silver content and recovery of 601.43 g/t and 83.41 %, respectively; iron powder with iron content of 96.39 %; and lead and zinc volatilization rate of 78.65 % and 97.64 %, respectively, were obtained. Toxicity characteristic leaching procedure (TCLP) results indicated that tailings were harmless. The mechanisms were subsequently investigated by combining thermodynamics analyses and systematic characterizations. Especially, a one-step containing two-stage capture silver mechanism was ascertained in reduction with sulfur: formation of silver-lead alloys, and encapsulation of silver-lead alloys by FeS phase to decrease symbiotic relationship between valuable metals and slag. This entire recycling process can provide ideas for harmless recovering precious metals from hazardous waste.
WOS关键词THERMAL-DECOMPOSITION ; LEAD ; SEPARATION ; HEALTH ; WASTE ; RISKS ; IRON ; ZN
资助项目Province Natural Science Foundation of Hebei ; National Key R&D Pro-gram of China ; Strategic Priority Science and Technology Project of Chinese Academy of Sciences ; key R&D and Promotion Special Projects of Henan Province ; [E2020111205] ; [2020YFC1909603] ; [2020YFC1909601] ; [XDA21040600] ; [212102310066]
WOS研究方向Engineering ; Mineralogy ; Mining & Mineral Processing
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000874150300001
资助机构Province Natural Science Foundation of Hebei ; National Key R&D Pro-gram of China ; Strategic Priority Science and Technology Project of Chinese Academy of Sciences ; key R&D and Promotion Special Projects of Henan Province
源URL[http://ir.ipe.ac.cn/handle/122111/55281]  
专题中国科学院过程工程研究所
通讯作者Guo, Qiang; Li, Yongli
作者单位1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Reso, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 101408, Peoples R China
3.Zhengzhou Inst Emerging Ind Technol, Zhengzhou 450003, Peoples R China
4.Hebei Zhongke Tongchuang Technol Co Ltd, Hengshui 053000, Peoples R China
推荐引用方式
GB/T 7714		 Yao, Guangzheng,Guo, Qiang,Li, Yongli,et al. An innovation technology for recovering silver and valuable metals from hazardous zinc leaching residue through direct reduction[J]. MINERALS ENGINEERING,2022,188:10.
APA Yao, Guangzheng.,Guo, Qiang.,Li, Yongli.,Xu, Ziyang.,Han, Zhenpeng.,...&Qi, Tao.(2022).An innovation technology for recovering silver and valuable metals from hazardous zinc leaching residue through direct reduction.MINERALS ENGINEERING,188,10.
MLA Yao, Guangzheng,et al."An innovation technology for recovering silver and valuable metals from hazardous zinc leaching residue through direct reduction".MINERALS ENGINEERING 188(2022):10.

入库方式： OAI收割

来源：过程工程研究所

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