Cupola with auxiliary gas generator
AssigneeModern Equipment Company
InventorsNorman P. Lillybeck, David E. Dell'Agnese
Life of this patent
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Abstract
A cupola for the melting of metal is provided with an auxiliary gas generator which supplies through the forehearth hot carbon monoxide rich gas to the bottom of the cupola as a source of heat. The heat of the gases maintains the cupola hearth and forehearth hot. Ordinary coal, or coke breeze or any other carbonaceous fuel may be burned in the generator. Additionally, the cupola may be allowed to go to zero output without cooling off.
Claims5
In combination;
- a cupola having means adjacent the upper end for infeeding of pieces of metal, coke, and flux, a plurality of tuyeres spaced above the bottom, and a molten metal and slag discharge passage at the bottom;
- a closed forehearth communicating with the outlet of said passage;
- a gas generator having normally closed means for infeeding at least carbon containing materials at the upper end, a passage at the lower end communicating with said forehearth, and a plurality of vertically spaced rows of tuyeres with the lowermost row being spaced from the lower end;
- and means for injecting preheated combustion air through the tuyeres of said generator and said cupola, whereby hot gases from said generator including carbon monoxide pass through said forehearth into the lower end of said cupola to provide an additional source of heat for said cupola due to the heat content of said hot gases and the combustion heat of carbon monoxide.
In combination, a cupola having means adjacent the upper end for infeeding of pieces of metal, coke, and flux, a plurality of tuyeres spaced above the bottom, and a molten metal and slag discharge passage at the bottom;
- a gas generator having normally closed means for infeeding at least carbon containing materials at the upper end, a passageway at the lower end communicating with the interior of said cupola at the bottom thereof spaced below the said tuyeres, and a plurality of vertically spaced rows of tuyeres with the lowermost row being spaced from the lower end;
- and means for injecting preheated combustion air through the tuyeres of said generator and said cupola, whereby hot gases from said generator at a temperature of at least 1370.degree. C. and of rich carbon monoxide content pass through said passageway and into the bottom of said cupola below the tuyeres thereof to provide an additional source of heat input to said cupola due to the heat content of said hot gases and the latent heat of combustion of the carbon monoxide thereof.
Dependencies are inferred from the claim text.