Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 4 No. 3 September 1994|
（Instilute of Multipurpose Utilization of Mineral Resources ; Ministry of Geology and Mineral Resources ; Zhengzhou 450006）
Abstract:The studies on sulphatizing roasting of Cu-Zn and complex sulphides are presented. The effects of roasting temperature and duration on the extraction of copper and zinc and volatility of sulphur and arsenic are discussed. The associations of some chalcopyrites and sphalerites with pyrites make it difficult to achieve high recoveries and high grades of the individual concentrate by beneficiation. Because of the high contents of Cu . Zn , Fe and S and the low contents of Ca and Mg in the ores, direct metallurgical treatments of the ores were carried out. There are some olienings and fissures outside and inside the leaching residues , this is beneficial for the extraction of gold and silver from the residues , which can also be used as hematite concentrate after removal of lead and zinc by reducing roasting.
Key words: complex sulphide ore concentrate roasting