Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1992-05-26
1994-02-15
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C21C 532
Patent
active
052862771
ABSTRACT:
A steelmaking process is disclosed utilizes solid ferrous metallic material as a substantial part of the metallic charge and uses heat released by combustion of two different types of carbonaceous materials and steel scrap that have been strategically charged inside of at least a partially refractory lined steelmaking vessel. One of the carbonaceous materials contains a high content of volatile hydrocarbons and is primarily responsible for early preheating and partial melting of the solid ferrous material. The second carbonaceous material contains a low content of volatile hydrocarbons and is primarily responsible for providing a reducing capability to the slag, for carburizing the melt and for providing additional heat generated by combustion which is used to enhance heating and melting of solid ferrous materials. This method of steelmaking also consists of the controllable introduction of oxygen rich oxidizing gas which initially is used for combustion of said hydrocarbons in the carbonaceous materials to melt solid ferrous metallic material and further is used for refining the resultant molten pool of ferrous material before tapping. Slag forming material is used at the bottom of the furnace to provide for continuous refining of molten ferrous material throughout entire steelmaking process. Molten blast furnace ("hot") iron also can be charged in an embodiment of this method of steel production. Electrical energy may be used as an additional heat source to increase the metallic yield.
REFERENCES:
patent: 4198230 (1980-04-01), Brotzmann et al.
patent: 4537629 (1985-08-01), Lazcano-Navarro
patent: 5084093 (1992-01-01), Yamaoka
Aizatulov Rafik
Galperine Grigori
Gitman Gregory
Grenader Jakov
Kustov Boris
Rosenberg Peter D.
Zaptech Corporation
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