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http://dx.doi.org/10.7844/kirr.2015.24.1.35

Distribution Behavior of Ni between CaO-SiO2-Al2O3-MgO Slag and Cu-Ni Alloy  

Han, Bo-Ram (TaeguTec LTD.)
Sohn, Ho-Sang (School of Materials Science and Engineering, Kyungpook National University)
Publication Information
Resources Recycling / v.24, no.1, 2015 , pp. 35-42 More about this Journal
Abstract
To obtain the fundamental information on the dissolution of nickel into the slag in the pyrometallurgical processes for treatment of wasted PCB, the distribution ratios of nickel between CaO-$SiO_2-Al_2O_3$-MgO slag and copper-5 wt%Ni alloy were measured at 1623 K to 1823 K under a controlled $CO_2$-CO atmosphere. The distribution ratio of Ni increased linearly with increasing oxygen partial pressure. Therefore, the dissolution reaction of nickel into the slags could be described by the following equation; $$Ni(l)_{metal}+\frac{1}{2}O_2(g)NiO(l)_{slag}$$ The distribution ratio of Ni increased linearly with increasing content of basic oxides(CaO and MgO) in slag. However, the distribution ratio of Ni decreased linearly with increasing temperature. From these results, the empirical equation of distribution ratio of Ni was obtained by the following equation from the analysis of experimental conditions by multiple regression. $${\log}L_{Ni}=0.4000{\log}P_{O2}-5.1{\times}10^{-4}T+0.3375\(\frac{X_{CaO}+X_{MgO}}{X_{SiO2}}\)$$
Keywords
nickel; slag; basicity; oxygen partial pressure; PCB;
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Times Cited By KSCI : 7  (Citation Analysis)
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