Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1995-10-30
1997-12-16
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75575, C21B 1100
Patent
active
056980108
ABSTRACT:
Provided herein is a scrap melting method capable of both producing a molten iron by efficiently melting scrap and producing a large amount of high calorie exhaust gas having a high utility value as a fuel gas and at the same time capable of performing such operation at a low production cost. Scrap, the source of iron, and coke are charged into a shaft furnace and pulverized coal and oxygen are injected into the furnace from a burner provided at the tuyere portion; in such injection of the pulverized coal and oxygen, the pulverized coal is injected from the center or in the vicinity thereof in diametrical direction of the burner and the oxygen is injected from the surrounding portion thereof to mix the two, thereby rapidly burning the pulverized coal in a combustion zone formed beyond the tuyere; and the scrap is melted by the sensible heat of thus generated combustion gas to produce a molten iron and the combustion gas is collected as a fuel gas without causing a significant post combustion of the combustion gas.
REFERENCES:
patent: 4921532 (1990-05-01), Corbett et al.
patent: 5127346 (1992-07-01), Kapplinger et al.
Kamei et al, "Scrapmelting Using a Shaft Type Furnace with Coke Packed Bed Infected with Highly Oxygen Enriched Air and a Large Quantity of Pulverized Coal,", Tetsu to Hagane: Journal of the Iron and Steel Institute of Japan, vol. 79, No. 2, 1993 Tokyo, Japan, pp. 139-146.
Klaus Scheidig, "Hot Metal Production Based On Scrap, Coal And Oxygen", Proceedings of The Eighth Japan-German Seminar, Oct. 6 and 7, 1993, Sendai, Japan, pp. 22-28.
Ariyama Tatsuro
Inoguchi Takanori
Matsuura Masahiro
Noda Hidetoshi
Sakamoto Noboru
Andrews Melvyn
NKK Corporation
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