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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 t...

In this study, nickel extraction from Karaçam (Eskisehir) region laterites by hydrochloric acid leaching is ai med. The mineralogical analysis showed that the ore sample contains goethite, hema tite, wustite, retgers ite, gaspeite and clay type minerals together with quartz. The effects of various parameters such as leaching time, stirring speed, acid concentration and leaching temperature on nickel recovery were determined. The shrinking core model was applied to the results of experime nts investigating the eff...