Melt and hold furnace for non-ferrous metals

Details Melt and hold furnace for non-ferrous metals Melt and hold furnace for non-ferrous metals

1980-03-10

1982-05-04

Rosenberg, P. D.

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By means introducing treating material

C21C 700

Patent

active

043279015

ABSTRACT:
A melt and hold furnace includes a melt and hold chamber configured for containing a molten metal bath and having a tap for withdrawing molten metal and a preheat hearth disposed above a top surface of the molten metal bath. A sealed combustion chamber is disposed above the melt and hold chamber and is separated therefrom by radiation plates for radiating heat into the molten metal and hearth. Disposed in an operative relationship with the combustion chamber is a recouperative type burner for causing unimpeded circulation of hot combustion exhaust gases over the radiation plates from the burner and return to exhaust ports disposed within the burner. Conduits, passing through the combustion chamber and into the molten metal provides additional heating of the metal by heat conduction and the introduction of hot non-oxidizing gas into the metal. The gas bubbles through the molten metal enhancing convective heat transfer within the metal as well as purifying the metal and protecting the metal from contact with combustion exhaust gas and the atmosphere.

REFERENCES:
patent: Re21332 (1940-01-01), Mader
patent: 1683343 (1928-08-01), Lanigan
patent: 2331887 (1943-10-01), Bonsack
patent: 2385333 (1945-09-01), Clapp
patent: 2497125 (1950-02-01), Hulme
patent: 2939899 (1960-06-01), Edstrand
patent: 4055334 (1977-10-01), Stephens

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