The Effect of Various Parameters in the Sulfuric Acid Leaching of Low Grade Zinc Oxide Ore of Niğde-Türkiye

Yıl 2024, Cilt: 28 Sayı: 5, 930 - 936

Özlem Kaya , Gürol Uysal

Öz

The aim of this study was to investigate the main parameters affecting the leaching of low grade zinc oxide ores with sulfuric acid. The influence of leaching time (5 to 480 minutes), sulfuric acid concentration (25 to 125 g/L), leaching temperature (25 to 90 °C), particle size (-104 µm, -82 µm, -60 µm, -49 µm) and solid/liquid ratio (1/10, 1/7.5, 1/5, 1/4) was investigated. The effects of these process parameters were studied with to achieve maximum zinc extraction with minimum iron extraction and acid consumption. The optimum parameters for sulfuric acid leaching of zinc ore were determined to be 60 min leaching time, 75 g/L sulfuric acid concentration, 80 oC leaching temperature, 1/10 solid/liquid ratio and -60 µm particle size. Under these optimum conditions, Zn extraction (%), Fe extraction (%) and acid consumption (ton H2SO4/ dissolved ton Zn) were obtained 88.68%, 25.83% and 5.47 ton H2SO4/ dissolved ton Zn respectively.

Anahtar Kelimeler

Leaching, Low grade zinc oxide ore, Zinc extraction

Etik Beyan

This study does not require ethics committee permission or any special permission.

Destekleyen Kurum

TUBITAK (the Scientific and Technical Research Council of Turkey)

Proje Numarası

Project no: 109M112

Teşekkür

Authors would like to thank for the financial support provided by TUBITAK (the Scientific and Technical Research Council of Turkey) for the Project no: 109M112

Kaynakça

• S. Espiari, F. Rashchi, S.K. Sadrnezhaad, “Hydrometallurgical treatment of tailings with high zinc content”, Hydrometallurgy, vol. 82, pp. 54-62, 2006.
• J. Deng, Q. Sun, P. Lin, G. Song, S. Wen, J. Deng and D. Wu, “Dissolution kinetics of zinc oxide ore with an organic Acid” International Journal of Metallurgical & Materials Engineering, vol.1: 109, 7 pages, 2015.
• M. Hurşit, O. Laçin, H. Saraç, “Dissolution kinetics of smithsonite ore as an alternative zinc source with an organic leach reagent”, Journal of the Taiwan Institute of Chemical Engineers, vol. 40, pp. 6-12, 2009.
• E.A. Abdel-Aal, “Kinetics of sulfuric acid leaching of low-grade zinc silicate ore, Hydrometallurgy, vol. 55, pp. 247-254, 2000.
• Y. Zhang, Y. Hua, X. Gao, C. Xu, J. Li, Y.Li, Q., Zhang, L. Xiong, Z. Su, M. Wang, J. Ru, “Recovery of zinc from a low-grade zinc oxide ore with high silicon by sulfuric acid curing and water leaching”, Hydrometallurgy, vol. 166, pp. 16-21, 2016.
• J. Frenay, “Leaching of oxidized zinc ore in various media”, Hydrometallurgy, vol.15, pp. 243-253, 1985.
• S. He, J. Wang, J. Yan, “Pressure leaching of high silica Pb-Zn oxide ore in sulfuric acid medium”, Hydrometallurgy, vol. 104, no. 2, pp. 235-240, 2010.
• T. Pecina, T. Franco, P. Castillo, E. Orrantia, “Leaching of a zinc concentrate in H2SO4 solutions containing H2O2 and complexing agents”, Minerals Engineering, vol. 21, no.1, pp. 23-30, 2008. B. Terry, A. J. Monhemius, “Acid dissolution of willemite ((Zn, Mn)2SiO4) and hemimorphite (Zn4Si2O7(OH)2.H2O)”, Metallurgical Transactions B, vol. 14B, pp. 335-346, 1983.
• T. Havlik, M. Turzakova, S. Stopic, B. Friedrich, “Atmospheric leaching of EAF dust with diluted sulphuric acid”, Hydrometallurgy, vol. 77, pp. 41-50, 2005. H. Xu, C. Wei, C. Li, G. Fan, Z. Deng, M. Li, X. Li, “Sulfuric acid leaching of zinc silicate ore under pressure”, Hydrometallugy, vol. 105, pp. 186-190, 2010.
• M.G. Bodas, “Hyrometallurgical treatment of zinc silicate ore from Thailand”, Hydrometallurgy, vol. 40, pp. 37-49, 1996.
• F.M. Santos, P.S. Pina, R. Porcaro, A.V. Oliveira, C.A. Silva, V.A. Leão, “The kinetics of zinc silicate leaching in sodium hydroxide”, Hydrometallurgy, vol. 102, pp. 43-49, 2010.