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DETERMINATION OF LEACH CONDITIONS OF KARACAM LATERITIC NICKEL ORES WITH SULFURIC ACID UNDER EFFECT OF SODIUM FLUORIDE

Tevfik Ağaçayak

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s04.108View metrics

Abstract

In this work, dissolution of Ni and Fe in sulfuric acid medium under the influence of sodium fluoride was studied. The samples of the nickeliferous late ritic ore were taken from Eski şehir (Karaçam) region of Turkey. The effects on the nickel and iron dissolution rates of stirring speed, sulfur ic acid concentration, sodium fluoride concentration, reaction temperature were investigated. In order to investigate the effects of leaching temperature range of 30-50 °C the shrinking core model was applied by using th e results of experiments. Kinetics analysis showed that the nickel and iron dissolution from lateritic ore could be described by the “diffusion” for nickel and “surface chemi cal reaction” for iron, respectively. The activation energies (Ea) and Arrhenius constants for the dissolution reactions were calculated.

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Publication details

Title
DETERMINATION OF LEACH CONDITIONS OF KARACAM LATERITIC NICKEL ORES WITH SULFURIC ACID UNDER EFFECT OF SODIUM FLUORIDE
Authors
Tevfik Ağaçayak
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Keywords
Lateritic oredissolution kineticsLeachingsulfuric acidsodium fluorideEskişehir (Karaçam)Turkey
References6

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  2. Brand N.W. Butt C.R.M. & Elias M. Nick el laterites: classification and features AGSO Journal of Australian Geology and Geophysics, 17(4), pp.81−88, 1998.

  3. Gleeson S.A. Butt C.R.M. & Elias M. “Nickel laterites: a review” SEG Newsletter Soc. Econ. Geosci., 54, pp.11–18, 2003.

  4. Agacayak T. Beneficiation of Karacam (E skisehir) Lateritic Nickel Ore by Physical and Chemical Methods, PhD thesis, Selcuk University, Turkey, 2008.

  5. Agacayak T. Aydoğ an S. & Zedef V. Dissolution of Lateritic Nickel Ore in Sulphuric Acid Medium with Potassium Dichromate, Modern Management of Mine Producing, Geology and Environmental Prot ection SGEM 2008, Bulgaria, vol:1, pp. 51–58, 2008.

  6. Agacayak T. & Zedef V. Dissolution Kinetics of Lateritic Iron Ore in Sulphuric Acid Medium, Modern Management of Mi ne Producing, Geology and Environmental Protection SGEM 2009, Bulgaria, vol:1, pp. 397–404, 2009.

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