铅锡合金的真空蒸馏深度脱铅(英文)  

Deeply removing lead from Pb-Sn alloy with vacuum distillation

作　　者：贾国斌[1,2] 杨斌[2] 刘大春[2] 

机构地区：[1]北京有色金属研究总院,北京100088 [2]昆明理工大学真空冶金国家工程实验室,昆明650093

出　　处：《中国有色金属学会会刊：英文版》2013年第6期1822-1831,共10页Transactions of Nonferrous Metals Society of China

摘　　要：采用分子相互作用体积模型计算在777℃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℃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。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%.

关 键 词：铅锡合金 分子相互作用体积模型 真空蒸馏 活度系数 

分 类 号：TF804.1[冶金工程—有色金属冶金]