Method and apparatus for reclaiming metal values from electric a

Details Method and apparatus for reclaiming metal values from electric a Method and apparatus for reclaiming metal values from electric a

1986-12-23

1988-07-19

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 3, C22B 108

Patent

active

047582685

ABSTRACT:
A method for the pyrometallurgical treatment of environmentally hazardous steelmill flue dust and sludges to separate and recover the volatile heavy metals from the flue dust material and to convert the remaining iron into recyclable directly reduced iron pellets, or disposable non-hazardous reoxidized iron pellets, or pig iron or shot and slag. The dust is mixed with solid carbonaceous reductant and a binder, pelletized, optionally dried, and reduced in an inclined rotary reduction smelter vessel. The distilled heavy metals are reoxidized and may be selectively segregated to reduce the gangue and lead oxide contamination from the reconcentrated zind oxide dust. The reconcentrated heavy metal oxide dust is recycled by the zinc/lead industry.

REFERENCES:
patent: 2805930 (1957-09-01), Udy
patent: 3150958 (1964-09-01), Collin
patent: 3206299 (1965-09-01), Senior
patent: 3656735 (1972-04-01), Eliot
patent: 3938987 (1976-02-01), Ban
patent: 4063930 (1977-12-01), Kusner

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