Protecting Liquid Mg by Solid CO_2: New Ways to Avoid SF_6 and SO_2

摘要

Lots of research had been done to find a new gas solution for replacing SF_6 or SO_2 in Mg production and processing caused by their extremely high global warming potential or toxicity. Linde Gas in co-operation with industrial and academic partners had developed a new tool for protecting liquid magnesium by covering the melt with solid CO_2. The patented dry ice technology hinders material losses caused by oxidation and reduces also the evaporation of Mg at higher temperatures. The cooling effect of the dry ice also extinguishes fires into a furnace by cooling the surface and replacing leaking nitrogen and oxygen.