Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1991-10-07
1992-12-01
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75 1053, C22B 1248, C22B 400
Patent
active
051676990
ABSTRACT:
There is disclosed a process for the production of molten steel or steel pre-products from scrap contaminated with combustible waste-like substances and heated and melted in a metallurgical meltdown vessel. In order to be able to dispose of the forming noxious substances at low costs and to keep the offgases free of impurities detrimental to the environment, the gas forming during charging of scrap into the metallurgical vessel and during heating and melting of the scrap, after conditioning to a temperature range of between 1000.degree. and 1500.degree. C., is used as a heating gas in a lime-burning process including a moving lime fixed-bed under release of its sensible heat. Sulfur- and chlorine-containing components of the heating gas are absorbed on the burnt lime and the dust contained in the heating gas is separated in the lime fixed-bed. The heating gas, which is purified and cooled at its passage through the lime fixed-bed, subsequently is finally purified in a filtering plant.
REFERENCES:
patent: 3529067 (1970-09-01), Grott
patent: 3645515 (1972-02-01), Kemmetmueller
Pirklbauer Wilfried
Weber Alfred
Rosenberg Peter D.
Voest-Alpine Industrieanlagenbau G.m.b.H.
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