MIVM在真空蒸馏分离锡锌合金中的应用及实验研究  

Modeling and Experimental Study of Tin-Zinc Alloy Separation by Vacuum Distillation

作　　者：孔令鑫[1,2] 杨斌[1] 李一夫[1,2] 徐宝强[1,2] 韩龙[1] 李亮[1] 刘大春[1] 

机构地区：[1]真空冶金国家工程实验室云南省有色金属真空冶金重点实验室云南省复杂有色金属资源清洁利用国家重点实验室(培育基地)昆明650093 [2]昆明理工大学冶金与能源工程学院昆明650093

出　　处：《真空科学与技术学报》2013年第5期483-489,共7页Chinese Journal of Vacuum Science and Technology

基　　金：国家重点基础发展计划项目(2013CB22803);云南省科技计划项目(2011008)

摘　　要：基于分子相互作用体积模型,首先使用牛顿迭代法结合Sn、Zn的无限稀活度系数γS∞n、γ∞Zn计算得出对势能相互作用参数Bij和Bji,并利用Bij和Bji计算Sn-Zn二元系的活度aSn、aZn,并将理论计算值与实验值进行对比分析,最后计算得到Sn-Zn合金真空蒸馏过程中的气液相平衡组成。结果表明:活度计算值和实验值吻合较好;蒸馏温度为1073 K,液相中含锡量为90%时,气相中含锡仅为0.00001%,Sn-Zn合金能够通过真空蒸馏实现良好分离。进一步实验验证结果表明,蒸馏温度1073K、恒温时间100 min,15 Pa条件下,液相中含锡为90%时,气相中含锡为0.002%,实验结果与预测结果吻合较好。此研究为真空蒸馏分离Sn-Zn合金提供了可靠的理论依据及预测模型。The molecular interaction volume model was applied to analytically calculate the separation of tin-zinc al- loy by vacuum distillation. The theoretically calculated and experimentally measured results were compared and analyzed. We found that the measured data agreed pretty well with the predicted activities of tin and zinc in the tin-zinc alloy. For example, vacuum distillated at 1073 K, 15 Pa for 100 min, the contents of tin in vapor and liquid phases were calculated to be 0.00001% （mass fraction）and 90%, respectively, indicating that it is feasible to completely separate tin from the tin-zinc alloy by vacuum distillation. The contents of gaseous phased and liquid phased tin were measured to be 0.002% and 90%, respectively.

关 键 词：分子相互作用体积模型 真空蒸馏 锡锌合金 活度 

分 类 号：TF131[冶金工程—冶金物理化学] TF01