The role of glycine in the ammonium thiocyanate leaching of gold

doi:10.1016/j.hydromet.2019.01.019

	The role of glycine in the ammonium thiocyanate leaching of gold
	Wu, Hao 1,2; Feng, Yali 1; Huang, Wanfu 3; Li, Haoran 2; Liao, Shengde 1
刊名	HYDROMETALLURGY
	2019-05-01
卷号	185 页码:111-116
关键词	Non-cyanide Gold extraction Ammonium thiocyanate Leaching theory
ISSN号	0304-386X
DOI	10.1016/j.hydromet.2019.01.019
英文摘要	Thiocyanate 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.
资助项目	China 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关键词	AMINO-ACIDS ; RECOVERY ; HYDROMETALLURGY ; COPPER ; ADSORPTION ; ORES
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000466255000015
资助机构	China Ocean Mineral Resource RD Association ; Major Science and Technology Program for Water Pollution Control and Treatment ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/28216]
专题	中国科学院过程工程研究所
通讯作者	Feng, Yali
作者单位	1.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
推荐引用方式 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.