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Received June 6, 2006
Accepted April 3, 2007
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Dissolution kinetics of chromite overburden by using mineral acids
Regional Research Laboratory, Bhubaneswar - 751 013, India
Korean Journal of Chemical Engineering, November 2007, 24(6), 932-935(4), 10.1007/s11814-007-0100-0
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Abstract
Two different mineral acids were used to determine the kinetics of dissolution of Ni and Fe from chromite overburden. Various leaching parameters were studied such as acid concentration, pulp density, temperature and particle size. Both Fe and Ni dissolution followed 1st order irreversible kinetics. The activation energy was also measured. Unified rate equations were established for Ni and Fe dissolution for two different mineral acids, HCl and H2SO4. The dissolution reaction was observed to follow diffusion control-dense-constant size spherical particles.
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Agatzin-Leonardou S, Zafiratos IG, Hydrometallurgy, 74, 267 (2004)
Valix M, Tang JY, Cheung WH, Miner. Eng., 14, 1629 (2001)
Georgion D, Papangelakis VG, Hydrometallurgy, 49, 23 (1998)
Sukla LB, Panchanadikar V, Hydrometallurgy, 32, 373 (1993)
Olanipekum EO, Int. J. Miner. Process., 60, 9 (2000)
Valix M, Usai F, Malik R, Miner. Eng., 14(2), 205 (2001)
Rao RB, Exploratory project report on utility of overburdens from chromite mines as a source of Ni, Co and Chromite, Regional Research Laboratory, Bhubaneswar (1982)
Livenspiel O, Chemical reaction engineering, Wiley New York, 357 (1962)
Smith JM, Chemical engineering kinetics, McGraw Hill, New York, 642 (1981)
Habashi F, Extractive metallurgy general principles, Chap. 8, Vol. 1, Gordon and Breach, New York, 154 (1969)
