The Fankou zinc concentrate (Guangdong province, China) was mineralogically characterized and results showed that the main germanium-bearing minerals in the sample comprised of zinc sulfide and galena, whereas gallium-bearing minerals were pyrite, sphalerite and silicate. Oxygen pressure leaching of zinc sulfide concentrate was carried out in order to investigate the effect of pressure, leaching time, sulfuric acid and copper concentrations on the leaching behavior of gallium and germanium. Under optimum conditions, leaching of Zn, Fe, Ge and Ga reached 98.21, 90.45, 97.45 and 96.65%, respectively. In the leach residues, it was determined that some new precipitates, such as PbSO4, CaSO4 and SiO2, were formed, which co-precipitated a certain amount of Ga and Ge from the leach solution. The results clearly indicated that Ga and Ge were much more difficult to leach than Zn, and provided answers to why the leaching efficiency of Ga is 10% lower when compared to Ge.
REFERENCES(34)
1.
BALDWIN, S.A., DEMOPOULOS, G.P., PAPANGELAKIS, V.G., 1995. Mathematical modeling of the zinc pressure leach process, Metall. Mater. Trans. B 26(5), 1035-1047.
BOLORUNDURO, S.A., DREISINGER, D.B., WEERT, G.V., 2003. Fundamental study of silver deportment during thepressure oxidation of sulphide ores and concentrates, Miner. Eng. 16(8), 695-708.
COLLINS, M.T., MCCONAGHY, E.J., STAUFFER, R.F., DESROCHES, G.J., KRYSA, B.D., 1994. Starting up the sherritt zinc pressure leach process at Hudson Bay, J. Met. 46(4), 51-58.
COOK, N.J., CIOBANU, C.L., PRING, A., SKINNER, W., DANYUSHEVSKY, L., SHIMIZU, M., SAINI-EIDUKAT, B., MELCHER, F., 2009. Trace and minor elements in sphalerite: A LA-ICP-MS study, Geochim. Cosmochim. Acta 73, 4761-4791.
COOK, N.J., CIOBANU, C.L., WILLIAMS, T., 2011. The mineralogy and mineral chemistry of indium in sulphide deposits and implications for mineral processing, Hydrometallurgy 108(108), 226-228.
COOK, N.J., ETSCHMANN, B., CIOBANU, C.L., GERAKI, K., HOWARD, D., WILLIAMS, T., RAE, N., PRING, A., CHEN, G., JOHANNESSEN, B., BRUGGER, J., 2015. Distribution and Substitution Mechanism of Ge in a Ge-(Fe)-Bearing Sphalerite, Minerals 5, 117-132.
DEPUYDT, B., THEUWIS, A., ROMANDIC, I., 2006. Germanium: From the first application of Czochralski crystal growth to large diameter dislocation-free wafers, Mater. Sci. Semicond. Process. 9(4), 437-443.
FRENZEL, M., HIRSCH, T., GUTZMER, J., 2016. Gallium, germanium, indium, and other trace and minor elements in sphalerite as a function of deposit type-A meta-analysis, Ore Geol. Rev. 76, 52-78.
LAMPINEN, M., LARRI, A., TURUNEN, I., 2015. Kinetic model for direct leaching of zinc sulfide concentrates at high slurry and solute concentration, Hydrometallurgy 153, 160-169.
LIANG, D.Q., WANG, J.K., WANG, Y.H., 2009. Difference in dissolution between germanium and zinc during the oxidative pressure leaching of sphalerite, Hydrometallurgy 95(1), 5-7.
MARKUS, H., FUGLEBERG, S.,VALTAKARI, D., SALMI, T., MURZIN, D. Y., LAHTINEN, M., 2004. Reduction of ferric to ferrous with sphalerite concentrate, kinetic modeling, Hydrometallurgy 73(3-4), 269–282.
SCHIMMEL, R.C., FABER, A.J., DE, W.H., BEERKENS, R.G.C., KHOE, G.D., 2001. Development of germanium gallium sulphide glass fibres for the 1.31 µm praseodymium-doped fibre amplifier, J. Non-Cryst. Solids 284(1), 188-192.
TROMANS, D., 1998. Oxygen solubility modeling in inorganic solutions: concentration, temperature and pressure effects, Hydrometallurgy 50(50), 279-296.
TONG, L., DREISINGER, D., 2009a. The adsorption of sulfur dispersing agents on sulfur and nickel sulfide concentrate surfaces, Miner. Eng. 22(5), 445-450.
TYSZCZUK, K., KOROLCZUK, M., GRABARCZYK, M., 2007. Application of gallium film electrode for elimination of copper interference in anodic stripping voltammetry of zinc, Talanta 71(5), 2098-2101.
WAN, Q., WANG, T.H., FENG, T., LIU, X.H., LIN, C.L., 2002. Synthesis of large-area germanium cone-arrays for application in electron field emission, Appl. Phys. Lett. 81(17), 3281-3283.
YE, L., COOK, N.J., CIOBANU, C.L., LIU, Y.P., ZHANG, Q., GAO, W., YANG, Y.L., DANYUSHEVSKY, L.V., 2011. Trace and minor elements in sphalerite from base metal deposits in South China: A LA-ICPMS study, Ore Geol. Rev. 2011, 39, 188-217.
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