Distribution of nickel between copper-nickel and alumina saturated iron silicate slags |
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Authors: | R G Reddy C C Acholonu |
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Affiliation: | (1) Department of Chemical and Metallurgical Engineering, Mackay School of Mines, University of Nevada Reno, 89557-0047 Reno, NV |
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Abstract: | The solubility of nickel in slag was determined by equilibrating copper-nickel alloys with alumina-saturated iron silicate
slags in an alumina crucible at 1573 K. The experiments were carried out under controlled oxygen partial pressures in the
range of 10-10 to 10-8 atm by use of suitable CO-CO2 gas mixtures, and at Fe/SiO2 ratio 1.34. The results showed that nickel dissolves in slag both as Ni2+ (nickel oxide) and Ni‡ (nickel metal), and the relation obtained was: (Wt pct Ni in slag) = (ie33-01) The activity coefficient
of nickel oxide (γdgNio) and distribution coefficient of nickel (ANi) is calculated to be 0.375 and 233.3, respectively. γdgNio and ANi are found to be independent of oxygen partial pressures. The presence of alumina increases the solubility of nickel in slags. |
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