Melting of metals without the use of protective atmospheres or vacuum techniques, in some cases prevents the proper conduct of the process due to the reactions of the heated metal with oxygen and other gases contained in the air. An example can be the problem with melting of titanium, which by binding with oxygen changes its structure practically at once.

Melting in a protective gas atmosphere, such as argon, is often insufficient.

Stands consisting of an induction furnace, the inductor of which is located in a vacuum chamber, and a set of pumps, including high vacuum pumps, allow for complete elimination of impurities that could change the composition of the metals being melted.