Acid leaching pretreatment on two-stage roasting pyrite cinder for gold extraction and co-precipitation of arsenic with iron | |
Wang, Yongliang1; Xiao, Li1,2; Liu, Hongxiao3; Qian, Peng1; Ye, Shufeng1; Chen, Yunfa1 | |
刊名 | HYDROMETALLURGY |
2018-08-01 | |
卷号 | 179页码:192-197 |
关键词 | Arsenic Removal Leaching Pyrite Cinder Gold Recovery Co-precipitation |
ISSN号 | 0304-386X |
DOI | 10.1016/j.hydromet.2018.06.008 |
英文摘要 | The leaching recovery of gold is low caused by the arsenic inclusion and gold encapsulation in the two-stage roasting pyrite cinder. It is necessary to pretreat the cinder to improve the recovery of gold. In this study, sulfuric acid was employed to remove arsenic and iron from the cinder, and then the arsenic was transferred to precipitates from the leaching solution by ferric ion precipitation for harmless disposal. The vast majority of the arsenic and iron were leached into the solution at 80 degrees C under atmospheric pressure. The recovery rate of gold in residue after non-cyanide extraction was greatly improved, and the gold content in residue decreased from 11.2 g/t to 3.8 g/t. The leached iron was partly precipitated by controlling the additive amount of hydrogen peroxide and pH value to precipitate the arsenic. The arsenic concentration in the solution was reduced to about 5 mg/L after 1 h of precipitation. The size of the precipitates was increased to > 100 m when the pH value was > 5.69. In addition, the precipitates had a strong adsorption capacity to absorb many other impurity ions such as ammonium. This study indicates that the removal of arsenic and iron from cinder is beneficial to increase the recovery of gold, and it is effective to remove the arsenic from the leaching solution through co-precipitation with ferric ion. |
资助项目 | National Key Research and Development Program of China during the 13th Five-year Plan Period[2017YFC0703200] |
WOS关键词 | Hydrogen-peroxide ; Aqueous-solutions ; Oxidation ; Removal ; Groundwaters ; As(Iii) ; Cyanide |
WOS研究方向 | Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000441644200024 |
资助机构 | National Key Research and Development Program of China during the 13th Five-year Plan Period |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/25590] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Wang, Yongliang; Ye, Shufeng |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Inst Proc Engn, Beijing 100049, Peoples R China 3.Xinjiang Star Tower Min Co Ltd, Xinjiang 834506, Tacheng Tuoli C, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Yongliang,Xiao, Li,Liu, Hongxiao,et al. Acid leaching pretreatment on two-stage roasting pyrite cinder for gold extraction and co-precipitation of arsenic with iron[J]. HYDROMETALLURGY,2018,179:192-197. |
APA | Wang, Yongliang,Xiao, Li,Liu, Hongxiao,Qian, Peng,Ye, Shufeng,&Chen, Yunfa.(2018).Acid leaching pretreatment on two-stage roasting pyrite cinder for gold extraction and co-precipitation of arsenic with iron.HYDROMETALLURGY,179,192-197. |
MLA | Wang, Yongliang,et al."Acid leaching pretreatment on two-stage roasting pyrite cinder for gold extraction and co-precipitation of arsenic with iron".HYDROMETALLURGY 179(2018):192-197. |
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