2013•Mining and MetallurgyRequires access

THE THERMODYNAMIC AND PROCESS OF PREPARATION OF HIGH PURITY CALCIUM BY VACUUM DISTILLATION

HU Zhi-fan

Abstract

In this paper,the thermodynamics and dynamics of the preparation of high purity calcium by vacuum distillation are calculated in detail.The pre-distillation and distillation process are studied to determine the optimized process of preparation of high purity calcium by vacuum distillation.The pre-distillation and distillation parameters are respectively 700 ℃,40 minutes.and 850 ℃,60 minutes.It is effective to prevent the vacuum distillation products from being polluted by electroplated coating of Cr on the inner wall of the distillation unit.The 99.998% high purity calcium can be obtained by the vacuum distillation once.

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Key concepts: Vacuum distillation, Distillation, Continuous distillation, Chemistry, Fractional distillation, Process (computing), Multiple-effect distillation, Calcium