Method of supplying heat energy to a metal melt or the like and

Details Method of supplying heat energy to a metal melt or the like and Method of supplying heat energy to a metal melt or the like and

1986-01-06

1987-10-20

Envall, Jr., Roy N.

Industrial electric heating furnaces

Resistance furnace device

With heating element detail

373127, H05B 310

Patent

active

047019336

ABSTRACT:
The method according to the present invention relates to supply of heat energy to a metal melt or a similar electroconductive fluid (1,11). According to said method rod-like elements are partly immersed in the metal melt or a similar electroconductive fluid, the end portions (6,15) of said elements projecting from the melt are connected to electric power, and said end portions (6,15) and the other end portions (5,16) of said element consist of an electroconductive material, whereas the relatively long center portion (3, 13) of said element being immersed in the melt consists of electric resistance material, and at least said resistance material is coated with an electric insulating heat conductive and melt bath resistant coat (4, 14) which, thus, transfers the heat energy created in the resistance material of the elements to the melt.
The invention, furthermore, relates to a heating element for use with said method. Said heating element essentially consists of end portions (6,15) projecting from the melt for connection to electric power and consisting of a material that is a good electric conductor and of a longer center portion (3, 13) consisting of electric resistance material and being provided with a coat (4, 14) made from one or more oxides of metal and/or metalloids.

REFERENCES:
patent: 2356237 (1944-08-01), Geller
patent: 2735881 (1956-02-01), Mann
patent: 4351057 (1982-09-01), Biolik et al.

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