Refinement of magnesium by vacuum sublimation

Abstract

The production of high purity magnesium was carried out by vacuum sublimation method. The apparatus for vacuum sublimation was constructed and the operation condition was investigated using commercial grade magnesium and magnesium alloy AM100 as volatile substances. The vacuum sublimation was effective for the separation of aluminum, manganese, copper and silicon. While the deposite of 99.99 mass% magnesium was not obtained by using commercial grade magnesium. The separation of zinc was sufficient at the condense portion of high temperature side. When vacuum sublimation was carried out for magnesium alloy AM100, the deposit of 99.99 mass% magnesium was obtained. The corrosion resistance of deposited magnesium obtained from magnesium alloy AM100 was superior to that of the other deposited magnesium.