Ore reduction using calcium oxide desulfurization

Details Ore reduction using calcium oxide desulfurization Ore reduction using calcium oxide desulfurization

1981-05-07

1983-01-25

Vertiz, O. R.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

423244, 423164, 423563, 423638, 423230, C21B 1300, C21B 1500, C01B 1700

Patent

active

043701612

ABSTRACT:
A process and apparatus for producing a low sulfur content hot reducing gas by desulfurizing hot reducing gas by contacting the sulfur-bearing hot reducing gas or carbonaceous material with a particulate calcium oxide desulfurizing agent to thereby produce a product gas stream and a byproduct calcium sulfide composition, and then recovering sulfur from the calcium sulfide composition by contacting the calcium sulfide composition with hot liquid water at a temperature and corresponding pressure sufficient to maintain steam in the system and wherein a major portion of the calcium sulfide composition has a particle size of less than about 6 mesh to thereby convert the sulfide to calcium hydroxide and hydrogen sulfide. A preferred process uses this low sulfur content gas to reduce iron ore, and especially wherein ore, calcium oxide and carbonaceous material are reacted in a shaft furnace.

REFERENCES:
patent: 1580452 (1926-04-01), Sperr
patent: 3443890 (1969-05-01), Sisson et al.

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