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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 4    No. 2    June 1994

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GAS-LIQUID EQUILIBRIUM OF Pb-Cd-Zn SYSTEM UNDER VACUUM
Liu Rixin1; Dai Yongnian2

1.Institute of Chemical Metallurgy; Academia Sinica; Beijing 100080
2.Department of Metallurgy; Kunming Institute of Technology; Kunming 650093

Abstract:The gas-liquid equilibrium of Pb-Cd-Zn system under vacuum was calculated and analysed.For the alloy conlaining(wt.-% ) Pb 1.5 Cd 0.3 Zn 98.2.the content ratio of gas to liquid NPb,g/NPb,l and NCd,g/NCd,l was 1.1 460×10-2,11.62 when distillation temperature was 1 1 80Kand 3. 308× 10 ̄(-3),45. 04 when distillation temperature was 773 K respectively. The moleculardistillation of Pb-Cd-Zn alloy at batch process was simulated.The results showed that vacuum distillation had lower operating temperature,better separation efficiency and lower energy consumption than distillation under atomosphere pressure.

 

Key words: Pb-Cd-Zn system vacuum distillation gas liquid equilibrium

ISSN 1672-7029
CN 43-1423/U

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