Shaft furnace

Details Shaft furnace Shaft furnace

1990-09-13

1991-06-04

Yuen, Henry C.

Heating

Heating or heat retaining work chamber structure

Protected, lined or reinforced melt holding section

432252, 432 99, F27D 108, F27B 1408

Patent

active

050209922

ABSTRACT:
A shaft furnace with a steel outer shell and a refractory lining inside the shell, has a sealed tap hole structure comprising a steel sleeve fitted to the outer shell, a permanent lining inside the sleeve and a refractory sealing material within said permanent lining. To improve the gas-tightness of the tap hole structure, a metal closure plate having an opening at which the tap hole is to be formed, is located within the steel sleeve and has its periphery coupled gas-tightly to the sleeve. A metal closure sleeve is coupled gas-tightly to said closure plate around said opening thereof and extends outwardly from said closure plate. Means e.g. conductive bricks are provided for removing heat from the closure plate and the closure sleeve.

REFERENCES:
patent: 1827194 (1931-10-01), Grothe
patent: 3256665 (1966-06-01), Salmi
patent: 3329420 (1967-07-01), Finn
patent: 3560164 (1971-02-01), Venable, Jr.
patent: 3752638 (1973-08-01), Van Laar et al.
patent: 4155703 (1979-05-01), Mantey et al.
patent: 4565525 (1986-01-01), Van Laar et al.
patent: 4852859 (1989-08-01), Van Laar et al.
patent: 4960379 (1990-10-01), Schneider
Patent Abstracts of Japan, vol. 1, No. 48, Y. Nakamura, 5/11/77.
Patent Abstracts of Japan, vol. 12, No. 47 (C-475)(2894), T. Fukutake, 2/12/88.

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