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Li L.,National Engineering Laboratory for Vacuum Metallurgy | Li L.,State Key Laboratory Breeding Base Of Complex Non Ferrous Metal Res Clear Utilization In Yunnan Province | Liu D.,National Engineering Laboratory for Vacuum Metallurgy | Liu D.,Key Laboratory of Vacuum Metallurgy for Non Ferrous Metal of Yunnan Province | And 9 more authors.
Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | Year: 2012

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 distillation temperature, temperature holding time, and pressure, on the volatilization behavior of the various components were evaluated. 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 materials show that the formation of the Ag 3Sb, Cu 2Sb and Cu 10Sb phases prevented complete Sb volatilization. Besides, as the temperature holding time increased, the pressure decreased, more rapidly at a higher distillation temperature.


Zhou H.,National Engineering Laboratory for Vacuum Metallurgy | Zhou H.,State Key Laboratory Breed Base Of Complex Non Ferrous Metal Rsrc Clear Utilization In Yunnan Province | Chen X.,National Engineering Laboratory for Vacuum Metallurgy | Chen X.,Key Laboratory of Vacuum Metallurgy for Non Ferrous Metal of Yunnan Province | And 7 more authors.
Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | Year: 2012

The 3-dimensional distributions of the transient temperature field, in the lab-built furnace dedicated to the vacuum alumina carbothermic reduction, were modeled based on finite element method, simulated with the software package ANSYS, and experimentally estimated. In the simulation, the continuous temperature rising in the heating and dissipation of heat was considered. The transient temperature distributions and the time evolution of the temperature field were also simulated. As compared to the test data, measured at the various key positions in the furnace with the platinum-rhodium thermocouples, the simulated results show a difference of less than 2%, and an average disagreement within 1%.


Li L.,National Engineering Laboratory for Vacuum Metallurgy | Li L.,State Key Laboratory Breeding Base Of Complex Non Ferrous Metal Res Clear Utilization In Yunnan Province | Liu D.,National Engineering Laboratory for Vacuum Metallurgy | Liu D.,Key Laboratory of Vacuum Metallurgy for Non Ferrous Metal of Yunnan Province | And 9 more authors.
Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | Year: 2012

The evaporation behavior of Sb in distillation of the Ag-contained Pb-Sb multi-component alloys at a pressure about 5~25 Pa, was studied to extract Sb. The impacts of the distillation conditions, including the distillation temperature and time, contents of other metal species, on the evaporation rate of Sb were evaluated: and the dependence of Sb evaporation rate on temperature was estimated. The Sb condensate and residual materials were characterized with X-ray diffraction. The results show that Sb dominates in the Sb condensate. The coexistence of Cu, Ag and Sb in the form of Cu 2Sb and Cu 10Sb 3, and Ag 3Sb in the residue was possibly responsible for incomplete evaporation of Sb. The evaporation rate of Sb was calculated to be 15.169~18.066 g·cm -2·h -1.


Xiong H.,National Engineering Laboratory for Vacuum Metallurgy | Xiong H.,Key Laboratory of Vacuum Metallurgy for Non Ferrous Metal of Yunnan Province | Xiong H.,State Key Laboratory of Complex Non ferrous Metal Resources Clear Utilization in Yunnan Province | Yang B.,National Engineering Laboratory for Vacuum Metallurgy | And 14 more authors.
Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | Year: 2014

A novel environmental firendly techniquie was developed to separate lead and antimoney from Jamesonite by vacuum evaporation. The impacts of the distillation conditions, such as the distillation temperature and time, pressure, and energy consumption, on the separation rates of lead and antimony were experimentally investigated. The contents of the condensed volatiles and slag were characterized with X-ray diffraction, and conventional chemical analysis. The preliminary results show that the newly-developed vacuum distillation is feasible to separate lead and antimony from jamesonite, and that the distillation temperature and time have a major impact on the separation. For example, at a distillation temperature ranging from 1200℃ to 1400℃, theseparation rates of lead and antimony were found to be higher than 99%. Besides, an increase of distillation time also weakly increased the separation rates. The multistage condenser is capable of enriching lead and antimony, respectively. The advantages of the novel technique over the conventional one on industrial scale were also tentatively discussed.


Wang W.,National Engineering Laboratory for Vacuum Metallurgy | Wang W.,Key Laboratory of Vacuum Metallurgy for Non Ferrous Metal of Yunnan Province | Xiong H.,National Engineering Laboratory for Vacuum Metallurgy | Xiong H.,Key Laboratory of Vacuum Metallurgy for Non Ferrous Metal of Yunnan Province | And 17 more authors.
Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | Year: 2015

We addressed the decomposition behavior of jamesonite (FePb4Sb6S14) in vacuum. The influence of the decomposition conditions, including but not limited to the decomposition temperature and time, the contents of jamesonite concentrate, and pressure, on the volatilization of PbS, Sb2S3 and ZnS was theoretically analyzed and experimentally evaluated with X-ray diffraction, differential scanning calorimetry-thermogravimetry, and conventional chemical analysis. The major compounds of the jamesonite concentrate include jamesonite, pyrite and stibnite. The preliminary results show that at 500℃, jamesonite can be completely decomposed into the stable compounds of Sb2S3, PbS and ZnS at a pressure in 1~10 Pa range. Complete volatilization of the Sb2S3, PbS and ZnS was observed at 500, 600 and 900℃, respectively. We suggest that the results be of some technological interest in vacuum metallurgy. ©, 2015, Science Press. All right reserved.

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