Process for the detoxification of steel plant wastes

Details Process for the detoxification of steel plant wastes Process for the detoxification of steel plant wastes

C - Chemistry, Metallurgy

22

B

53/354

C22B 7/02 (2006.01) B09B 3/00 (2006.01) C21B 3/04 (2006.01) C21B 13/10 (2006.01) A62D 3/00 (2006.01)

Patent

CA 1337242

A technique for rendering toxic metals (chromium, lead, cadmium and arsenic) contained in steel plant furnace dust innocuous and suitable for burial with minimal adverse environmental impact. Pelletized iron oxide containing dust is introduced into a rotary hearth furnace under a reducing atmosphere in excess of 600°C. The higher iron oxides are reduced to FeO which in turn complexes with the toxic metals to form relatively benign products.

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