DISSOLUTION KINETICS OF NICKEL FROM GÖRDES (MANİSA-TURKEY) LATERITIC ORE BY SULPHURIC ACID LEACHING UNDER EFFECT OF SODIUM FLUORIDE

Tevfik AĞAÇAYAK, Ali ARAS

Abstract


In this study, dissolution kinetics of nickel from Gördes (Manisa-Turkey) lateritic ore by sodium fluoride in sulphuric acid solution was investigated. The effects of stirring speed, sulphuric acid concentration, sodium fluoride concentration and temperature on nickel extraction were examined. To determine the dissolution kinetics of nickel in sulphuric acid medium under effect of sodium fluoride, shrinking core model was applied to dissolution recoveries. As a result of kinetic studies, it was determined that mixed kinetic model was appropriate. The activation energy (Ea) for the dissolution was calculated as 41.24 kJ/mol.


Keywords


Dissolution kinetics; lateritic ore; nickel; sulphuric acid; sodium fluoride; activation energy

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References


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