摘要
采用含银铅锑多元合金为原料，对其真空蒸馏法富集Ag、Sb的可行性和工艺进行探讨，考察蒸馏温度、恒温时间对合金中各组分的挥发行为影响，理论和实验均证实了该方法可行。试验结果表明：系统压力5-25Pa，Ag，sb的挥发随着温度的增加和恒温时间的延长而加剧，蒸馏温度为1223K，恒温时间30-120min时，Ag的富集率均大于99．28％，Sb的挥发率为89．7％-92．8％；x射线衍射仪研究表明残留物中形成化合物A幻Sb，Cu2Sb，culosb3，导致Sb不能彻底挥发；蒸馏过程中，系统压力随着恒温时间的延长而下降，且蒸馏温度越高下降越明显。
The feasibility of extracting and enriching Ag and Sb by vacuum distillation of the Pb-Sb multi-component alloys were theoretically analyzed, based on thermodynamics. The impacts of distillation conditions, including the distilla- tion temperature, temperature holding time,and pressure,on the volatilization behavior of the various components were e- valuated. The results show that at a pressure of 5 - 25 Pa, the increase of the distillation temperature and time intensify the volatilization of Ag and Sb.At 1223 K for 30- 120 min, the enrichment rate of Ag and volatization rate of Sb were found to be higher than 99.28% ,and 89.7%-92.8% ,respectively.The X-ray diffraction results of the residue materi- als show that the formation of the Ag3Sb,Cu2Sb and Cul0Sb phases prevented complete Sb volatilization. Besides, as the temperature holding time increased, the pressure decreased, more rapidly at a higher distillation temperature.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2012年第7期593-598,共6页
Chinese Journal of Vacuum Science and Technology
基金
云南省基金项目(2010ZC061
2010CI009)
关键词
含银多元合金
真空蒸馏
分离
富集
Ag-contained multi-component alloys, Vacuum distillation, Separation, Enrichment
