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Journal of Mining and Metallurgy B: Metallurgy
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2012, vol. 48, br. 2, str. 185-195
Kinetics and mechanism of sphalerite leaching by sodium nitrate in sulphuric acid solution
(naslov ne postoji na srpskom)
aInstitut za tehnologiju nuklearnih i drugih mineralnih sirovina - ITNMS, Beograd
bUniverzitet u Beogradu, Tehnički fakultet u Boru

e-adresam.sokic@itnms.ac.rs
Projekat:
Razvoj tehnoloških procesa prerade nestandardnih koncentrata bakra u cilju optimizacije emisije zagađujućih materija (MPNTR - 34023)

Ključne reči: sphalerite leaching; sodium nitrate; sulphuric acid; kinetics; mechanism
Sažetak
(ne postoji na srpskom)
Interest for application of hydrometallurgical processes in a processing of complex sulphide ores and concentrates has increased in recent years. Their application provides better metal recoveries and reduced emission of gaseous and toxic ageneses in the environment. The kinetics and mechanism of sphalerite leaching from complex sulphide concentrate with sulphuric acid and sodium nitrate solution at standard conditions was presented in this paper. The influences of temperature and time on the leaching degree of zinc were investigated and kinetic analysis of the process was accomplished. With temperature increasing from 60 to 90oC, the zinc leaching increased from 25.23% to 71.66% after 2 hours, i.e. from 59.40% to 99.83% after 4 hours. The selected kinetic model indicated that the diffusion through the product layer was the rate-controlling step during the sphalerite leaching. The activation energy was determined to be 55 kJ/mol in the temperature range 60-90oC. XRD, light microscopy and SEM/EDX analyses of the complex concentrate and leach residue confirmed formation of elemental sulphur and diffusion-controlled leaching mechanism.
Reference
Aydogan, S., Aras, A., Canbazoglu, M. (2005) Dissolution kinetics of sphalerite in acidic ferric chloride leaching. Chemical Engineering Journal, 114(1-3): 67-72
Aydogan, S. (2006) Dissolution kinetics of sphalerite with hydrogen peroxide in sulphuric acid medium. Chemical Engineering Journal, 123(3): 65-70
Babu, M.N., Sahu, K.K., Pandey, B.D. (2002) Zinc recovery from sphalerite concentrate by direct oxidative leaching with ammonium, sodium and potassium persulphates. Hydrometallurgy, 64(2): 119-129
Baldvin, A., van Weert, G. (1996) On the catalysis of ferrous sulphate oxidation in autoclaves by nitrates and nitrites. Hydrometallurgy, 42(2): 209
Bobeck, G.E., Su, H. (1985) Metallurgical Transactions B, 16 (413):
Bredenhann, R., van Vuuren, C. (1999) The leaching behaviour of a nickel concentrate in an oxidative sulphuric acid solution. Minerals Engineering, 12(6): 687
Burkin, A.R. (1996) The chemistry of hydrometallurgycal processes. London: E and FN Spon
Cheng, C.Y., Clarkson, C.J., Manlaping, E.V. (1994) AusIMM Proceedings, 2, 57
Crundwell, F.K. (1998) AlChE Journal, 34, 7, 1128
Droppert, D., Shang, Y. (1995) The leaching behaviour of nickeliferous pyrrhotite concentrate in hot nitric acid. Hydrometallurgy, 39(1-3): 169
Dutrizac, J. (1990) Elemental sulphur formation during the ferric chloride leaching of chalcopyrite. Hydrometallurgy, 23(2-3): 153-176
Dutrizac, J.E. (2006) The dissolution of sphalerite in ferric sulfate media. Metallurgical and Materials Transactions B, 37(2): 161-171
Habashi, F. (1999) Nitric acid in the hydrometallurgy of sulfides. u: Mishra B. [ur.] EPD Congress, San Diego, CA, Warrendale: TMS - AIME, str. 25-32
Habashi, F. (1970) Extractive metallurgy. Hydrometallurgy, vol. 2
Habashi, F. (2009) Recent trends in extractive metallurgy. Journal of Mining and Metallurgy B: Metallurgy, vol. 45, br. 1, str. 1-13
Hackl, R.P., Dreisinger, D.B., Peters, E., King, J.A. (1995) Passivation of chalcopyrite during oxidative leaching in sulphate media. Hydrometallurgy, 39, 25-48
Harvey, T., Yen, W. (1998) The influence of chalcopyrite, galena and pyrite on the selective extraction of zinc from base metal sulphide concentrates. Minerals Engineering, 11(1): 1-21
Kammel, R., Pawlek, F., Simon, M., Xi-Ming, L. (1987) Metall, 41: 158
Kawulka, P., Haffenden, W.J., Mackiw, V.N. (1975) Recovery of zinc from zinc sulfides by direct pressure leaching. U.S. Patent, Feb. 18. 3, 867; 268
Khoshnevisan, A., Yoozbashizadeh, H. (2012) Determination of optimal conditions for pressure oxidative leaching of Sarcheshmeh Molybdenite concentrate using Taguchi method. Journal of Mining and Metallurgy B: Metallurgy, vol. 48, br. 1, str. 89-99
Li, C., Wei, C., Xu, H., Li, M., Li, X., Deng, Z., Fan, G. (2010) Oxidative pressure leaching of sphalerite concentrate with high indium and iron content in sulfuric acid medium. Hydrometallurgy, 102(1-4): 91-94
Lochmann, J., Pedlik, M. (1995) Kinetic anomalies of dissolution of sphalerite in ferric sulfate solution. Hydrometallurgy, 37(1): 89-96
Peng, P., Xie, H., Lu, L. (2005) Leaching of a sphalerite concentrate with H2SO4-HNO3 solutions in the presence of C2Cl4. Hydrometallurgy, 80(4): 265-271
Perez, P.I., Dutrizac, J.E. (1991) The effect of the iron content of sphalerite on its rate of dissolution in ferric sulphate and ferric chloride media. Hydrometallurgy, 26(2): 211-232
Rönnholm, M.R., Wärna, J., Salmi, T., Turunen, I., Luoma, M. (1999) Kinetics of oxidation of ferrous sulfate with molecular oxygen. Chemical Engineering Science, 54(19): 4223-4232
Santos, S.M.C., Machado, R.M., Correia, M.J.N., Reis, M.T.A., Ismael, M.R.C., Carvalho, J.M.R. (2010) Ferric sulphate/chloride leaching of zinc and minor elements from a sphalerite concentrate. Minerals Engineering, 23(8): 606-615
Sharp, J.H., Brindley, G.W., Achar, N.B.N. (1966) Numerical Data for Some Commonly Used Solid State Reaction Equations. Journal of the American Ceramic Society, 49(7): 379-382
Sokic, M., Markovic, B., Matkovic, V., Živkovic, D., Štrbac, N. (2009) Leaching of chalcopyrite concentrate by sodium nitrate in sulphuric acid. u: Domic Esteban, Jesus Casas [ur.] HYDROCOPPER 2009, V International Copper Hydrometallurgy Workshop, 243-253
Sokic, M., Markovic, B.Z., Živkovic, D.T. (2009) Kinetics of chalcopyrite leaching by sodium nitrate in sulphuric acid. Hydrometallurgy, vol. 95, br. 4-Mar, str. 273-279
Sokić, M.D., Matković, V.Lj., Marković, B.R., Štrbac, N.D., Živković, D.T. (2010) Pasivizacija halkopirita tokom luženja rastvorom sumporne kiseline u prisustvu natrijum-nitrata. Hemijska industrija, vol. 64, br. 4, str. 343-350
Souza, A.D., Pina, P.S., Santos, F.M.F., da Silva, C.A., Lero, V.A. (2009) 207, 3-4, 95
Štrbac, N., Mihajlović, I., Živković, D., Boyanov, B., Živković, Ž., Cocić, M. (2006) Kinetics and mechanism of synthetic CoS oxidation process. Journal of Mining and Metallurgy B: Metallurgy, vol. 42, br. 1, str. 81-91
Vračar, R., Vučković, N., Kamberović, Ž. (2003) Leaching of copper(I) sulphide by sulphuric acid solution with addition of sodium nitrate. Hydrometallurgy, 70(1-3): 143-151
Yao, J.H., Li, X.H., Li, Y.W. (2011) Study on indium leaching from mechanically activated hard zinc residue. Journal of Mining and Metallurgy B: Metallurgy, vol. 47, br. 1, str. 63-72
Zhang, Y., Li, X., Pan, L., Liang, X., Li, X. (2010) Studies on the kinetics of zinc and indium extraction from indium-bearing zinc ferrite. Hydrometallurgy, 100(3-4): 172-176
 

O članku

jezik rada: engleski
vrsta rada: neklasifikovan
DOI: 10.2298/JMMB111130022S
objavljen u SCIndeksu: 25.01.2013.