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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 764 pages |
| ISBN: | 978-0-9879917-5-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Pressure Leaching Of Copper Sulphide Concentrate With Oxygenated Sulphuric Acid
Jerzy Wodka1; Chmielewski Tomasz1;1WROCLAW UNIVERSITY OF TECHNOLOGY, Wroclaw, Poland;
Type of Paper: Regular
Id Paper: 140
Topic: 14
Abstract:
Presented are the results of laboratory investigations on pressure leaching of copper sulphide concentrate produced at Lubin Concentrator (KGHM Polish Copper). Elevated content of base metals (Co, Ni, Zn, As, Ag, Pb) and of organic carbon was the specific feature of the concentrate. High content of cobalt and zinc, high content of Pb and As and the concentration of organic carbon exceeding 10 % make this concentrate both unique and hard to process by means of flash smelting. Alternative, hydrometallurgical method of Lubin concentrate processing is currently seriously considered. The effect of initial temperature, concentration of sulphuric acid, and oxygen partial pressure on leaching rate and metals recovery has been investigated. Leaching was performed in a stirred autoclave at temperatures within the range of 120 - 180 oC. Oxygen at partial pressure from 5 to 12.5 at was used as an oxidizing agent. It was found, that consid-erable increase of the leaching rate and recovery of copper can be observed with in-creasing both temperature and oxygen partial pressure. The recovery of cobalt and nickel was evidently lover. SEM microscopy examinations were performed for solid residue after leaching in order to explain observed leaching kinetics.