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Extraction of copper, zinc and cadmium from copper-cadmium-bearing slag by oxidative acid leaching process
Li, Meng1,2; Zhang, Ying2; Wang, Xiao-Hui2; Yang, Jian-Guang3; Qiao, Shan2; Zheng, Shi-Li2; Zhang, Yi2
2021-10-01
Source PublicationRARE METALS
ISSN1001-0521
Volume40Issue:10Pages:2975-2984
AbstractAn intensified oxidative acid leaching of copper-cadmium-bearing slag featuring using high-efficient oxygen carrier, such as activated carbon, was investigated to achieve high leaching rate of valuable metals. The effects of leaching variables, including agitation rate, sulfuric acid concentration, temperature, slag particle size, activated carbon and cupric ion concentration, were examined. It is found that leaching rates of cadmium and zinc both exceed 99 % in a very short time, but for copper, leaching rate of 99 % is achieved under the optimized leaching parameters, which are agitation rate of 100 r.min(-1), sulfuric acid concentration of 15 wt%, leaching temperature of 80 degrees C, slag particle size of 48-75 mu m, activated carbon concentration of 3 g.L-1, liquid-to-solid ratio of 4:1, oxygen flow rate of 0.16 L.min(-1), and leaching time of 60 min. The macro-leaching kinetics of copper metal was analyzed, and it is concluded that the inner diffusion is the controlling step, with apparent activation energy of 18.6 kJ.mol(-1). The leaching solution with pH value of 2-4 can be designed to selectively extract valuable metals without neutralization, and the leaching residue can be treated by prevailing Pb smelting process.
KeywordCopper-cadmium-bearing slag Catalytic oxidative acid leaching Activated carbon Kinetics
DOI10.1007/s12598-016-0759-7
Language英语
WOS KeywordSOLVENT-EXTRACTION ; DISSOLUTION ; KINETICS ; RECOVERY ; FERRITE ; SPHALERITE ; SULFATE ; GRAPHITE
Funding ProjectNational Science & Technology Pillar Program during the Twelfth Five-Year Plan Period of China[2012BAC12B01] ; Major Scientific and Technological Special Project of Hunan Province, China[2012FJ1010]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Science & Technology Pillar Program during the Twelfth Five-Year Plan Period of China ; Major Scientific and Technological Special Project of Hunan Province, China
WOS IDWOS:000658809100003
PublisherNONFERROUS METALS SOC CHINA
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49229
Collection中国科学院过程工程研究所
Corresponding AuthorZheng, Shi-Li
Affiliation1.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China
Recommended Citation
GB/T 7714
Li, Meng,Zhang, Ying,Wang, Xiao-Hui,et al. Extraction of copper, zinc and cadmium from copper-cadmium-bearing slag by oxidative acid leaching process[J]. RARE METALS,2021,40(10):2975-2984.
APA Li, Meng.,Zhang, Ying.,Wang, Xiao-Hui.,Yang, Jian-Guang.,Qiao, Shan.,...&Zhang, Yi.(2021).Extraction of copper, zinc and cadmium from copper-cadmium-bearing slag by oxidative acid leaching process.RARE METALS,40(10),2975-2984.
MLA Li, Meng,et al."Extraction of copper, zinc and cadmium from copper-cadmium-bearing slag by oxidative acid leaching process".RARE METALS 40.10(2021):2975-2984.
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