High efficiency aluminum scrap melter and process therefor

Details High efficiency aluminum scrap melter and process therefor High efficiency aluminum scrap melter and process therefor

1975-12-22

1977-03-08

Roethel, John E.

Metallurgical apparatus

Process

266141, 266155, 266156, 266901, C21B 1100

Patent

active

040109356

ABSTRACT:
A high efficiency aluminum scrap melting system is provided in which a portion of the hot combustion gases employed to melt the aluminum in a hearth is recycled through scrap-receiving preheat compartments to preheat scrap and volatilize contaminants as the scrap is fed to the hearth, the remainder of the hot combustion gases leaving the hearth as hot exhaust gases being optionally employed through a recuperator to preheat air which is fed to a combustion burner system used to burn hydrocarbon fuel and provide heat for the overall system. Energy available in the contaminants also supplements the energy supply to the system.

REFERENCES:
patent: 2794631 (1957-06-01), Becker et al.
patent: 3839016 (1974-10-01), Rawlings

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