Process for the removal of non-ferrous metals from solid ferrous

Details Process for the removal of non-ferrous metals from solid ferrous Process for the removal of non-ferrous metals from solid ferrous

1990-12-21

1992-02-25

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75587, C22B 2100

Patent

active

050909991

ABSTRACT:
A process for removing non-ferrous metal, such as Cu, Sn, Zn or the like, from solid ferrous scrap, which includes the steps of: admixing solid ferrous scrap containing non-ferrous metal with liquid Al, Mg, and or alloys thereof comprising at least 20 wt. % in total of Al and/or Mg at a temperature of higher than the melting point of the liquid metal and lower than the melting point of Fe; and separating said solid ferrous scrap from said molten metal. The non-ferrous metals in contact with the liquid metal at high temperatures are efficiently dissolved into the liquid metal and transferred from the scrap to the liquid metal. The resulting ferrous scrap is suitable as a Fe source for electric-furnace steelmaking.

REFERENCES:
patent: 3396777 (1968-08-01), Reeling
patent: 3634066 (1972-01-01), Matthews
patent: 4511398 (1985-04-01), Kugler

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