Abstract
The lateritic nickel ore sample subjected to this experimental study was taken from Karacam ore deposit (Eskisehir-Turkey) and contains 1.80% Ni, 23.90% Fe, 1.58% Mg and 0.034% Co. According to the mineralogical analysis of lateritic nickel ore samples, goethite, hematite, wustite, retgersite, gaspeite, quartz and clay type minerals were observed. The leaching conditions of lateritic nickel ore in a nitric acid medium were investigated by studying the effects of its leaching parameters, such as stirring speed, temperature, nitric acid concentration and the particle size of the sample on Ni extraction. The maximum nickel extraction was obtained with the following conditions: 200 rpm stirring speed, 10/500 g/mL solid/liquid ratio, 240 min of leaching time, a 2.0 M nitric acid concentration, 80°C leaching temperature and -38 μm particle size fraction.
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