Metallurgical apparatus – With control means responsive to sensed condition – With means responsive to condition of treated material
Patent
1974-09-18
1976-01-20
Dost, Gerald A.
Metallurgical apparatus
With control means responsive to sensed condition
With means responsive to condition of treated material
266 33R, 432 72, F27B 1700
Patent
active
039333434
ABSTRACT:
Metallic scrap contaminated with combustibles is melted in a well-type furnace to recover the metallic component with the aid of preheated air and heat generated by burning the fumes generated by the combustible contaminants. The scrap is fed into a depository well which communicates with a main furnace well under a combustion chamber in which burners are operated. Melting heat is transmitted through the molten material within the wells to the incoming scrap within the depository well to maintain its temperature at a level sufficient to melt the scrap and both significantly, heat the air above the depository well and vaporize the combustibles. A negative pressure is maintained above the depository well by a hood covering the depository well thus preventing the escape of fumes but admitting air. The hood communicates with a duct system which incorporates a blower and leads to the burners. The fumes and air from the depository well are thereby directed into the burners, which ignite and burn the same; sometimes with conventional fuel such as natural gas, the latter being needed in only a reduced amount.
REFERENCES:
patent: 2065207 (1936-12-01), Betterton
patent: 2264740 (1941-12-01), Brown
patent: 2836901 (1958-06-01), Davis
patent: 3379425 (1968-04-01), Dell'Agnese et al.
patent: 3645516 (1972-02-01), Turpin et al.
Dost Gerald A.
U.S. Reduction Co.
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