Stepped end rotary furnace

Details Stepped end rotary furnace Stepped end rotary furnace

1991-12-12

1993-08-10

Evans, Geoffrey S.

Industrial electric heating furnaces

Plasma furnace device

Indirect heating

373 62, 373 72, 65DIG4, 110341, 432239, H05B 100

Patent

active

052356116

ABSTRACT:
The invention is directed to improved centrifugal rotary electric furnaces which are used for the heating and or fusion of minerals, such as quartz, and other materials having a high melting point. The furnace includes a generally cylindrical furnace shell and a decreasing diameter stepped end member attached to each end of the shell which is intended to more closely conform the end of the furnace to the shape of fused ingot or melted charge formed inside the furnace, while still providing a sufficient depth of unmelted charge between the fused or melted material and the end member to insulate the end member from excessive heat and the warpage and other damage caused thereby.

REFERENCES:
patent: 2104555 (1938-01-01), Cousteix
patent: 2121109 (1938-06-01), Weinheimer
patent: 2997006 (1961-08-01), Grosse
patent: 3102154 (1963-08-01), Renton
patent: 3795752 (1974-03-01), Verhoeven et al.
patent: 3821455 (1974-06-01), Greenewald
patent: 3937866 (1976-02-01), Sunnen et al.
patent: 4217462 (1980-08-01), Rawles et al.
patent: 4346523 (1982-08-01), Ronning
H. George, "Electrical Furnaces With Carbon Radiator," Transactions of the American Institute of Electrical Engineers, vol. 54, pp. 1195-1199 (New York 1935).

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