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The role of glycine in the ammonium thiocyanate leaching of gold
Wu, Hao1,2; Feng, Yali1; Huang, Wanfu3; Li, Haoran2; Liao, Shengde1
2019-05-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume185Pages:111-116
AbstractThiocyanate leaching is an efficient and environmentally friendly method to extract gold due to fast leaching speed, excellent reaction selectivity and slight environmental risks, but thiocyanate is easily oxidized to decompose by oxidant in the leaching process, resulting in large consumption of leaching agent. In this work, synergistic leaching experiments were carried out with a mixed reagent system of ammonium thiocyanate and glycine for exploring the role of glycine in thiocyanate leaching. And the theoretical mechanism of glycine in thiocyanate leaching was also investigated. The results showed that as glycine was added into the thiocyanate leaching solution, the decomposition reaction of thiocyanate would be lessened, resulting in lower ammonium thiocyanate consumption. Meanwhile, owing to its characteristic of gold dissolution, glycine can be used as an additional leaching agent to increase the gold leaching ratio. Optimized gold-extraction efficiency (93.15%) of gold-bearing flotation concentrate was achieved under the following conditions: a concentration of thiocyanate, glycine and oxidant Fe3+ at 0.6 mol/dm(3), 5 g/dm(3) and 0.05 mol/dm(3), respectively; stirring speed at 600 rpm; pH at 2; temperature at 298 K; leaching time of 3 h and a liquid-solid ratio of 4:1.
KeywordNon-cyanide Gold extraction Ammonium thiocyanate Leaching theory
DOI10.1016/j.hydromet.2019.01.019
Language英语
WOS KeywordAMINO-ACIDS ; RECOVERY ; HYDROMETALLURGY ; COPPER ; ADSORPTION ; ORES
Funding ProjectChina Ocean Mineral Resource RD Association[DY135-B2-15] ; Major Science and Technology Program for Water Pollution Control and Treatment[2015ZX07205-003] ; National Natural Science Foundation of China[21176242] ; National Natural Science Foundation of China[21176026]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationChina Ocean Mineral Resource RD Association ; Major Science and Technology Program for Water Pollution Control and Treatment ; National Natural Science Foundation of China
WOS IDWOS:000466255000015
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28216
Collection中国科学院过程工程研究所
Corresponding AuthorFeng, Yali
Affiliation1.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing, Peoples R China
2.Chinese Acad Sci, State Key Lab Biochem Engn, Inst Proc Engn, Beijing, Peoples R China
3.Jiangxi Univ Sci & Technol, Sch Resource & Environm Engn, Ganzhou, Peoples R China
Recommended Citation
GB/T 7714
Wu, Hao,Feng, Yali,Huang, Wanfu,et al. The role of glycine in the ammonium thiocyanate leaching of gold[J]. HYDROMETALLURGY,2019,185:111-116.
APA Wu, Hao,Feng, Yali,Huang, Wanfu,Li, Haoran,&Liao, Shengde.(2019).The role of glycine in the ammonium thiocyanate leaching of gold.HYDROMETALLURGY,185,111-116.
MLA Wu, Hao,et al."The role of glycine in the ammonium thiocyanate leaching of gold".HYDROMETALLURGY 185(2019):111-116.
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