Sealed rotary hearth furnace

Details Sealed rotary hearth furnace Sealed rotary hearth furnace

1988-06-14

1989-04-04

Yuen, Henry C.

Heating

Work chamber having heating means

Having means by which work is progressed or moved mechanically

432242, 432139, F27B 916

Patent

active

048182222

ABSTRACT:
The furnace has a hearth which rotates inside a stationary closed chamber and is supported therein on circumferentially spaced rollers the shafts of which extend outside the furnace and are cantilevered in bearings. The shafts are sealed to the furnace wall by mechanical and pressurized gas sealing means. The charge is deposited through the furnace roof on the rim of the hearth as it rotates and is moved toward the center of the hearth by rabbles. Externally generated hot gases are introduced into the furnace chamber below the hearth and rise through perforations in the hearth and up through the charge. Exhaust gases are withdrawn through the furnace roof. Treated charge drops from a center outlet on the hearth into a soaking pit which extends downwardly through the furnace floor to which it is also sealed.

REFERENCES:
patent: 3763011 (1973-10-01), Allred
patent: 4207061 (1980-06-01), Ikenoga et al.
patent: 4449924 (1984-05-01), Ceretti

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