Treatment of waste from iron ore reduction
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United States of America Patent
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Oct 6, 1987
Grant Date -
N/A
app pub date -
Oct 11, 1983
filing date -
Oct 11, 1983
priority date (Note) -
Expired
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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.
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