F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
39/1, 53/355, 39
F27B 14/02 (2006.01) F27B 3/06 (2006.01) F27B 3/18 (2006.01) F27D 3/00 (2006.01) F27B 7/20 (2006.01) F27D 13/00 (2006.01) F27D 17/00 (2006.01)
Patent
CA 1058862
ABSTRACT OF THE DISCLOSURE This describes a metal melting furnace consisting of a melt drum lined with refractory material. Heat is supplied by two burners, one at each end of the melt drum capable of burn- ing oil, gas or powered fuel or any combination of same. The unique burner creates a rotating flame pattern that expands to the dimension of interior of the drum and/or combustion chamber for complete contact with the molten metal and the melt drum. The melt drum is capable of partial rotative racking action first in one direction and then the other. Metal is fed through a charge port in the side wall of the drum each partial revolution and when up to temperature, molten metal may be withdrawn from pouring spouts near the top of the drum each time the drum reaches the end of its travel in either direction. The complete flame coverage of the drum and/or combustion chamber and molten metal by the rotating flame pattern plus the near constant roll- ing motion of molten metal over three-quarters of the side wall area of the melt drum ensures maximum heat utilization and rapid initial heat. A feature of the furnace is an annular exhaust flue that directs the exhaust gases passing through the side wall charging port to a vertical outlet, regardless of the rotated position of the charge port. The furnace exhaust gases are utilized to dry and preheat the incoming metal load and to gener- ate steam to protect the exhaust damper and fuel burners from erosion. The very dry steam is passed through the burners to the retort. The furnace body is water cooled. The heat picked up is absorbed in the air circuit to the fuel burners and re- cycled.
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