Recovery of Cobalt and Copper from Pyrite Concentrate
Beneficiation of the pyrite concentrate of the Kastomonu-Küre (Northern Turkey) copper ore seems to be attractive due to its high Cu, Co, and Zn contents. Pyrite concentrate were used in the experimental studies. Cu, Co, and Zn were recovered from the concentrate by the sulphatizing roasting, leaching and the precipitation using H2S. Sulphatizing roasting experiments were carded out in a rotary furnace and the optimal roasting conditions were found to be at 650℃ roasting temperature and 3.0 h roasting period and addition of Na2SO4 of 3 % for the concentrate containing 0.58% Cu, 0.22% Co, and 0.04% Zn. Then, the roasted product was repeatedly leached with 10 g/L H2SO4 solution. Optimal conditions were found to be 60 ℃ leaching temperature, 2 h leaching period, and 30% pulp density. Leaching efficiencies for Cu and Co were over 99 %.The valuable metals in the pregnant solution were selectively precipitated by H2S as sulfides.Selective precipitation of Cu, Zn, Co was achieved by adjusting the pH and the temperature of the leach solution. Final metal recoveries of 99.20% Cu, 99.40% Co, and 95.60% Zn were attained. The precipitated sulphides are marketable products.Roasting gases with their 15% SO2 content are suitable for the production of H2SO4 and the leach residues can be integrated with the iron ore processing plant as they contain 57.50 % Fe, 17.70% gangue (SiO2, CaO, etc.), 0.04% S, and 0.06% non-ferrous metals.
Copper Cobalt Leaching Precipitation Hydrometallurgy
N. Acarkan G. (O)nal S. (Alpyildiz) E. A(c)ma
Mineral Processing Engineering Department, Istanbul Technical University, Istanbul, Turkey Metallurgical and Materials Engineering Department, Istanbul Technical University, Istanbul, Turkey
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3069-3074
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）