2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining
| Editors: | Kongoli F, Kumar V, Aifantis K, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 220 pages |
| ISBN: | 978-1-987820-54-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Experimental research on leaching valuable metals from waste diamond cutters with ammonia-ammonium sulfate system
ping xue1; Li Guangqiang2; Qin Qingwei2; Mingxing Wei3;1WUHAN UNIVERSITY OF SCIENCE AND TECNOLOGY, Wuhan, China; 2WUHAN UNIVERSITY OF SCIENCE AND TECNOLOGY, wuhan, China; 3SCHOOL OF ELECTROMECHANICAL AND ARCHITECTURAL ENGINEERING, JIANGHAN UNIVERSITY, Wuhan, China;
Type of Paper: Regular
Id Paper: 72
Topic: 7
Abstract:
Waste diamond cutters are a kind of renewable resources with high value. In addition to diamond particles, the content of copper and zinc in some waste diamond cutters is up to 30%, respectively. Leaching copper and zinc from waste diamond cutters were carried out with ammonia-ammonium sulfate system using air as an oxidant. The influence of system variables on the copper and zinc recovery by leaching was investigated, such as reaction temperature, time, liquid-solid ratio, stirring speed, reactant concentration and air flow rate. The results show that the optimum leaching condition with ammonia-ammonium sulfate system was as follows: reaction temperature of 45ˇaC, leaching time of 3h, liquid-solid ratio of 50:1, stirring speed of 200rpm, ammonia concentration of 4.0mol/L, ammonium sulfate concentration of 1.0mol/L and air flow rate of 0.2L/min. In the optimum leaching condition, the average leaching recovery of copper and zinc was up to 69.87% and 69.42%, respectively. Kinetic analysis of ammonia leaching shows that the leaching reaction for copper can be modeled with the shrinking core model and was controlled by the surface chemical reaction.
Keywords:
Acid; Hydrometallurgical; Leaching; Non-Ferrous; Recycling; Wastes;References:
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