초록 ▼

A device is provided for melting by direct induction substances which are dielectric when cold and whose temperatures of inductibility and melting are close to each other, such as glasses or vitreous enamels. This melting is carried out inside a receptacle whose sidewall comprises a multi-turn induc

A device is provided for melting by direct induction substances which are dielectric when cold and whose temperatures of inductibility and melting are close to each other, such as glasses or vitreous enamels. This melting is carried out inside a receptacle whose sidewall comprises a multi-turn inductor made from metal tubing whose inward-looking faces are exposed and which combines the functions of heating the charge by induction and cooling the periphery thereof. Such a receptacle which is at the same time a heating inductor and a cooling surface is applicable more especially to industrial electric furnaces for the production of molten glass or enamel by direct induction.

대표청구항 ▼

A device for direct induction melting of charges made from substances which are dielectric when cold and which present temperatures of inductibility close to their melting points, including a heating inductor having at least one winding made up from a plurality of superposed closely-spaced turns of

A device for direct induction melting of charges made from substances which are dielectric when cold and which present temperatures of inductibility close to their melting points, including a heating inductor having at least one winding made up from a plurality of superposed closely-spaced turns of conducting metal tubing, electrically and hydraulically connected in series and having a vertical axis of symmetry, said winding carrying a flow of both an alternating electric current and of a cooling fluid, and a receptacle of electrically insulating material for containing said charges, having a sidewall in which said inductor extending over substantially the entire height thereof, is contained, wherein at least the inwardly-turned faces of innermost one of said at least one winding are uncovered, so as to make the major portion of the inner face of said receptacle sidewall entering into direct contact with the periphery of the charge, a metallic and cooled surface.