Theoretical research on vacuum separation of Au-Ag alloy

作     者：Shuang-ping WANG Jin-yang ZHAO Bao-qiang XU Ling-xin KONG Wen-long JIANG Bin YANG 王双平;赵晋阳;徐宝强;孔令鑫;蒋文龙;杨斌

作者机构：National Engineering Research Center for Vacuum MetallurgyKunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China State Key Laboratory of Complex Nonferrous Metal Resources Clean UtilizationKunming University of Science and TechnologyKunming 650093China 

基　　金：supported by the National Natural Science Foundation of China (No.52064029) Yunling Scholarship of Yunnan Province Ten-Thousand Plan,China (No.KKRC201952012) Yunnan Province Ten Thousand Talents Program-Youth Top Talent Project,China (No.2018-73) 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2022年第32卷第8期

页      码：2719-2726页

摘      要：To provide an accurate prediction of the product component dependence of temperature and pressure in vacuum distillation and give convenient and efficient guidance for the designing of the process parameters of industrial production, according to the molecular interaction volume model(MIVM), the separation coefficient(β) and vapor-liquid equilibrium composition of Au-Ag alloy at different temperatures are calculated. Combined with the vapor-liquid equilibrium(VLE) theory, the VLE phase diagrams, including the temperature-composition(T-x) and pressure-composition(p-x) diagrams of Au-Ag alloy in vacuum distillation are plotted. The triple points and condensation temperatures of gold and silver vapors are calculated as well. The results show that the β decreases and the contents of gold in vapor phase increase with the distillation temperature increasing. Low pressures have positive effect on the separation of Ag and Au. The difference between the condensation temperatures of gold and silver is about 450 K in the pressure range of 1-10 Pa.

主 题 词：Au-Ag alloy vacuum separation molecular interaction volume model(MIVM) vapor-liquid equilibrium(VLE)phase diagram condensation temperature 

学科分类：080603[080603] 0806[工学-电气类] 08[工学] 

核心收录：

D　O　I：10.1016/S1003-6326(22)65978-8

馆 藏 号：203114411...