Process mineralogy characteristics of acid leaching residue produced in low-temperature roasting-acid leaching pretreatment process of refractory gold concentrates

被引:21
|
作者
Zhang, Shuang-hua [1 ]
Zheng, Ya-jie [1 ]
Cao, Pan [1 ]
Li, Chao-hui [2 ]
Lai, Shen-zhi [2 ]
Wang, Xing-jun [2 ]
机构
[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
[2] Western Reg Gold Yili Co Ltd, Yining 835100, Peoples R China
关键词
acid leaching residue; roasting; process mineralogy; precious metals; occurrence states; CARBONACEOUS MATTER; BEARING ORE; BEHAVIOR; FLOTATION; OXIDATION;
D O I
10.1007/s12613-018-1664-x
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
To provide a theoretical basis for a suitable process to extract gold from refractory gold concentrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical composition, X-ray diffraction, scanning electron microscopy-energy spectrum, and mineral dissociation analysis. The results showed that the acid leaching residue contained Au 68.22 g/t, Ag 92.71 g/t, Fe 0.44%, As 0.10%, and S 0.55%. Gold and silver minerals existed as native gold, argentite, and proustite. Quartz, the main gangue mineral, accounted for 78.33wt/%. The dissociation degree analysis showed that the proportions of monomer and exposed gold in acid leaching residue were 96.66wt%. The cyanidation results showed that the cyanide gold leaching rate of acid leaching residues was close to 100wt%. However, the maximum cyanide gold leaching rate of gold calcine was only 85.31wt%. This suggests that acid leaching can increase the gold dissolution rate in the cyanide process.
引用
收藏
页码:1132 / 1139
页数:8
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