High frequency induction furnaces

In language understandable by the average electrical engineer, this paper presents a brief outline of the theory of the electric induction furnace and of the application of that theory to the operating characteristics and limitations of such furnaces. From a metallurgical standpoint the chief advantages associated with the use of induction furnaces are: freedom from contamination of the melt, the high temperatures obtainable, and the circulation of the molten charge by the electromagnetic forces within it. The immediate acceptance by the industry of this comparatively new melting tool indicates that more extensive use of high frequency induced heat is to be expected in the future.