应用相律对Pb-S-O体系内组分进行分析,确定了该体系可能存在的4个三凝聚相点.结合拓扑规则和相关平衡反应的热力学计算,绘制该体系三凝聚相点之间的两种关联图:α型平面拓扑图和β型平面拓扑图.分析结果表明:β型平面拓扑图与传统Pb-S-O体系优势区图一致,说明可以基于拓扑规则绘制Pb-S-O体系优势区图;α型平面拓扑图可以解释Kivcet炼铅工艺在高氧位、高硫位条件下直接生成大量粗金属Pb的现象.
@@@@The components of Pb-S-O system were analyzed with phase rule, and four coexisting points of three condensed phases were determined. The relation-diagrams among coexisting points of three condensed phases for the Pb-S-O system, which were denoted asαplane topological diagram andβplane-topological diagram, were plotted based on topological rules and thermodynamic calculation of related equilibrium reactions. The results show that theβplane- topological diagram is in accordance with the predominance area diagram of Pb-S-O system calculated by traditional methods, indicating that this method is feasible to plot predominance area diagram of Pb-S-O system. Meanwhile, αplane-topological diagram can be used to elucidate the phenomenon of which crude lead is generated under high oxygen and sulfur pressures during Kivcet process.
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