2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 3: Non-ferrous & Iron_Steel
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 522 pages |
| ISBN: | 978-1-987820-05-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Valuable metals separation from copper anode slime by alkaline smelting-leaching process
Dong Li1; Xueyi Guo1; Zhipeng Xu1; Jingxin Liu1;1CENTRAL SOUTH UNIVERSITY, Changsha, China;
Type of Paper: Regular
Id Paper: 110
Topic: 3
Abstract:
Copper anode slime is abundant in valuable metals like Cu, Pb, Sb, Sn, Se and precious metals. In this paper, the soluble behavior of metals from copper anode slime was investigated using an alkaline smelting-leaching process. The anode slime was smelted with sodium hydroxide and sodium nitrate followed by leaching with water. Various parameters were studied, including the sodium hydroxide addition, sodium nitrate addition, smelting temperature, smelting time, leaching temperature and time in leaching process. More than 97%Se, 98%As, 86%Sn and 76%Pb were extracted into solution under determined conditions. Simultaneously, less than 1.5%Cu and 3.5%Sb were extracted respectively. The alkaline concentration of the leach solution was about 2.4mol/L. The leaching residue was characterized by physico- chemical techniques, such as XRF and XRD, which indicate that most of Cu, Sb, Ni, Te, Ag and Au are left in leaching residue. This process provides a simple and effective way for valuable metals separation from copper anode slime.