Metallurgical apparatus – Process
Patent
1979-03-21
1980-09-23
Andrews, M. J.
Metallurgical apparatus
Process
266281, 266901, 75 46, 432 10, 432224, 432225, C21C 700
Patent
active
042238730
ABSTRACT:
A system for heating ladles prior to the receipt of a charge of molten metal therein, including heating said ladles by direct thermal transfer from the output gases of a heat source, and including waste heat recuperation and controls for maximizing the efficiency of combustion and for maximizing the rate of heating of said ladles without use of excess fuel. The system of the invention includes a heat exchanger defining an opening in its side to directly receive a ladle supported on its side, the heat exchanger including fuel burners for projecting flame and combustion gases directly into the ladle and a heat exchange chamber for directly receiving the hot combustion gases from the ladle for use in preheating inlet gases to be mixed with fuel for combustion in the burners. Means is provided for transporting the heat exchanger horizontally into and out of engagement with the ladle. A control circuit is provided to maintain the combustion gases at a predetermined temperature and to adjust the fuel-air ratio delivered to the burners to maximize combustion and minimize the amount of oxygen remaining in the combustion gases.
REFERENCES:
patent: 792642 (1905-06-01), Williams
patent: 1057905 (1913-04-01), Widekind
Andrews M. J.
The Cadre Corporation
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