Treatment of waste from iron ore reduction

Details Treatment of waste from iron ore reduction Treatment of waste from iron ore reduction

1983-10-11

1987-10-06

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Binary compound

423244, 423242, 423165, 423178, 75 25, C01B 3124, C01B 1716, C01F 1118, C21B 1704

Patent

active

046982191

ABSTRACT:
Spent flux containing calcium oxide and calcium sulfide, recovered from the reduction of iron ore, is carbonated, as an aqueous slurry, in two stages, with the first stage being operated at a pH to prevent reaction of calcium sulfide, and the second stage being operated at a pH at which calcium sulfide is reacted to produce an effluent gas containing hydrogen sulfide.

REFERENCES:
patent: 394387 (1888-12-01), Parnell
patent: 690502 (1902-01-01), Wing
patent: 2611682 (1952-09-01), Mannbro
patent: 3508863 (1970-04-01), Kiminki et al.
patent: 3533739 (1970-10-01), Pelczarski et al.
patent: 4060588 (1977-11-01), Mandelik
patent: 4083944 (1978-04-01), Chalmers
patent: 4201571 (1980-05-01), Scarlett et al.

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