CAJ | 학술논문

采用分子相互作用体积模型计算在777°C时不同Pb含量铅锡合金的活度系数，结果与实验值符合较好。对800~1300°C全成分范围内铅锡合金的活度系数进行预测，为铅锡金真空蒸馏分离提供必要的热力学参数。对两种不同铅含量的铅锡合金进行小型和工业实验，将锡中的铅含量降至0.01%以下。设计全成分范围的铅锡合金真空蒸馏处理流程，对铅含量10%~90%的铅锡合金经真空蒸馏处理后可得到纯度为99.5%的粗铅和铅含量在0.01%以下的精锡。
채용분자상호작용체적모형계산재777°C시불동Pb함량연석합금적활도계수，결과여실험치부합교호。대800~1300°C전성분범위내연석합금적활도계수진행예측，위연석금진공증류분리제공필요적열역학삼수。대량충불동연함량적연석합금진행소형화공업실험，장석중적연함량강지0.01%이하。설계전성분범위적연석합금진공증류처리류정，대연함량10%~90%적연석합금경진공증류처리후가득도순도위99.5%적조연화연함량재0.01%이하적정석。
Activity coefficients of Pb?Sn alloy with different Pb contents at 777 °C were calculated with molecular interaction volume model, which agree well with the available experimental values. Activity coefficients at 800?1300 °C were predicted to supply valuable data for thermodynamic calculation of vacuum distillation. Small-scale and continuous industrialized experiments of vacuum distillation for two different components of Pb?Sn alloys were performed and the lead content in refined tin was decreased to less than 0.01%successfully. Vacuum distillation treatment of Pb?Sn alloy in which lead content fluctuated from 10%to 90%was put forward. The final product is crude lead with purity above 99.5%and refined tin with lead content less than 0.01%.