Method and apparatus for reclaiming metal values from...

Details Method and apparatus for reclaiming metal values from... Method and apparatus for reclaiming metal values from...

C - Chemistry, Metallurgy

22

B

39/18, 53/354

C22B 1/243 (2006.01) C21B 3/04 (2006.01) C22B 1/24 (2006.01) C22B 5/10 (2006.01) C22B 5/16 (2006.01) C22B 7/02 (2006.01) C22B 13/02 (2006.01) C22B 19/04 (2006.01)

Patent

CA 1308262

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 con- vert 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 car- bonaceous 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 zinc oxide dust. The reconcentrated heavy metal oxide dust is recycled by the zinc/lead industry. Docket 1200

553973

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