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

1987-06-25

1988-10-25

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C21B 304, C22B 702

Patent

active

047801352

ABSTRACT:
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.degree. C. The higher iron oxides are reduced to FeO which in turn complexes with the toxic metals to form relatively benign products.

REFERENCES:
patent: 3836353 (1974-09-01), Holley
patent: 4266967 (1981-05-01), Yamada et al.
patent: 4396424 (1983-08-01), Yatsunami et al.
patent: 4488905 (1984-12-01), Santen
patent: 4612041 (1986-09-01), Matsuoka et al.
Chemical Abstracts (1977) 86:7638z.
Chemical Abstracts (1986) 105:9840t.
Chemical Abstracts (1986) 104:190312q.
Chemical Abstracts (1977) 86:4587e.

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