溶融鉛 - アンチモン - 酸素系の相平衡と成分の活量

概要

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Phase equilibria and activities of the components in the liquid lead-antimony-oxygen ternary system have been investigated at 1,173 and 1,223 K to discuss the recovery of lead and antimony from an used lead-battery thermodynamically.The two liquid phases of metal and oxide were observed at the temperatures studied, and the tie lines indicating isoactivities were determined. The activities of PbO, SbO1.5 and Sb2O3 in the PbO-SbO1.5 and PbO-Sb2O3 pseudo-binary systems were then calculated by applying the Gibbs-Duhem equation to the phase relation of metal-oxide equilibrium. Both in the pseudo-binary systems the activities exhibit negative deviations from Raoults law. The vapor pressures of lead, antimony and lead oxide, antimony oxide were calculated by using the activities of the components in the lead-antimony-oxygen ternary system. As a result, an oxidation of antimony in the anode slime concentrated from an used lead-battery followed by evaporation as antimony oxide (Sb4O6) was found to be considerably effective for the recovery of lead and antimony.
社団法人資源・素材学会の論文
2001-02-25