One-step preparation of high purity magnesium by vacuum distillation technology

In this work, on the basis of thermodynamic considerations, a horizontal fractional condensing vacuum (HFCV) furnace was designed to purify primary magnesium ingot by vacuum distillation. In the volatilization process, most of the impurities were remained in the residue, and a few impurities volatilized with magnesium could condense at different temperature regions in condensation process. Finally, magnesium more than 99.999% (5 N) purity was collected in the high temperature condensation region and magnesium more than 4 N was collected in the lower temperature region by one step. Besides, the content of Fe and Zn was effectively controlled in the experiment process.

Automated summary

This work designed a horizontal fractional condensing vacuum (HFCV) furnace to purify primary magnesium ingot through vacuum distillation based on thermodynamic considerations. Most impurities were left in the residue during volatilization process, while a few impurities volatilized with magnesium could condense at different temperature regions in the condensation process. The experiment successfully collected magnesium with purity higher than 99.999% (5 N) in the high temperature condensation region and magnesium higher than 4 N in the lower temperature region in one step, effectively controlling the content of Fe and Zn.