FIELD: process engineering.
SUBSTANCE: invention may be used in metallurgy and chemical industry. Dry additive including reagent and adsorbent is fed in sintering unit or pelletiser offgas upstream of cloth filter 3, in particular, in gas flue. Then, said additive is separated from offgas by cloth filter 3. Sodium bicarbonate NaHCO3 is used as said reagent. Additive is, at least partially is recycled in offgas flow upstream of cloth filter 3, particularly, in gas flue. Offgas features temperature below 140°C while mean time of fresh reagent residence makes about two hours.
EFFECT: ruled out cooling of gas required for lime-bearing reagent.
13 cl, 3 dwg
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