US 4,378,105 AGranted

Apparatus for melting metals

OwnerJosef Zeuginventor

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Abstract

Metal is melted in melting vessels heated in a melting furnace by combustion of fuel and by exhaust gases from the combustion. In order to prevent evaporation, overheating and contamination of the melt, the exhaust gases of the melting furnace, including unburned fuel components of the exhaust gases, are directed through a channel of limited cross-sectional size into a melting chamber of substantially larger cross-sectional size. The hot gases are directed against the surface of melting vessels in the furnace and are allowed to expand in the melting chamber to transfer heat to melting vessels there. In addition, the hot gases are retained and the unburned components are burned in the melting chamber so that their heat capacity is given off to objects within the melting chamber to be stored in those objects to achieve a high degree of utilization of the fuel.

Claims12

Dependent claims

In a melting furnace, for melting metals and metal alloys, including:

a. a furnace chamber;
b. a first melting vessel disposed within said furnace chamber;
c. means to produce hot combustion gases and direct said gases on said first melting vessel in said furnace chamber;
d. at least one additional heat insulated chamber for receiving a metal mass to be heated;
e. an exhaust gas canal coupling said furnace chamber to said additional chamber, the input cross section of said additional chamber being larger than that of the exhaust gas canal;
and
f. a single chimney connected only to said additional chamber, the improvement comprising:
g. the additional chamber forming a melting chamber having an open cross section (F.sub.2) maintained at a size such that at least one second melting vessel may extend into it;
h. a second melting vessel extending into and acted upon on all sides by the exhaust gases in said melting chamber;
and
i. a heat radiating and heat storing inner wall for burning unburned fuel in said hot combustion gases which are exhausted to said melting chamber forming the inside wall of said melting chamber.

8 more elements

Dependencies are inferred from the claim text.