Furnace for melting solid ferrous pieces

Details Furnace for melting solid ferrous pieces Furnace for melting solid ferrous pieces

1974-06-13

1977-07-05

Lake, Roy

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By means introducing treating material

13 26, 75 11, 266197, 266234, 266900, 266901, C21C 700

Patent

active

040335623

ABSTRACT:
A furnace for melting solid ferrous pieces such as pig iron and steel scrap, features a combination of electric induction heating and flame heating of the pieces which are charged into the furnace hearth via a charging stack up through which the products of combustion flow from the furnace counter-current to the descending charged pieces moving downwardly through the stack. The flame heating is via burners supplied with hydrocarbon fluid fuel with oxygen proportioned for incomplete combustion, the products of combustion and unburned fuel ascending through the stack and preheating the descending charged pieces. Air is supplied to the stack to complete the combustion of the previously unburned fuel in and around the descending pieces, this being done at a level where the descending pieces have not yet reached temperatures sufficient to cause excessive oxidation of the pieces. Other details providing for effective utilization of these principles, are included in the disclosure.

REFERENCES:
patent: 1880012 (1932-09-01), Brassert
patent: 1948696 (1934-02-01), Brassert et al.
patent: 2139853 (1938-12-01), Rohn
patent: 2363582 (1944-11-01), Gerber et al.
patent: 2382534 (1945-08-01), Baily
patent: 3236628 (1966-02-01), Bogdandy
patent: 3671029 (1972-06-01), Karlsson et al.
patent: 3752663 (1973-08-01), Worner et al.
patent: 3827877 (1974-08-01), Pantke et al.
The Cupola & its Operation, The American Foundrymen's Society, Third Edition 1965, pp. 8-9.

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