Abstract
FeO-Fe2O3-SiO2 slags were equilibrated in pure nickel crucibles under a CO-CO2 atmosphere. The Fe/SiO2 ratios in the slag were fixed at 1.51 and 1.97 at temperatures of 1200 and 1300°C. The CO2/CO ratios were varied up to values corresponding to magnetite saturation. On the basis of solubility data obtained, a computer model was developed to predict the solubilities of nickel and copper in slag during the continuous converting of nickel-copper matte. These are given as a function of five parameters: temperature, iron content and Cu/Ni ratio in the matte, partial pressure of SO2 in the gas phase, and magnetite activity in the slag. The model is helpful in comprehending converting reactions and of practical applicability in optimizing the conventional as well as continuous converting processes.
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