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现代大型高炉在防止大气污染方面,必须从一次除尘系统和二次烟尘控制两方面采取措施解决。一次除尘系统是在高炉出铁场内,将散发烟尘的污染源进行密闭(加盖或罩),然后进行局部抽风,经大型布袋除尘器净化。它的作用是着重解决主沟、撇渣器、铁沟、渣沟、摆动流嘴、主沟修理场,泥炮口和炉顶装料处等产生的烟尘,其控制能力仅占整个出铁场烟气量的50～80％。
Modern large-scale blast furnaces must take measures from the primary dust removal system and secondary smoke control to prevent atmospheric pollution. The primary dedusting system is to seal the fumes emitted from the blast furnace in the cast iron field (covering or hooding), and then conduct partial exhaustion and purify by a large bag filter. Its role is to solve the main dust, slag skimmer, iron ditch, slag ditch, oscillating flow nozzle, main ditch repair yard, mud gun mouth and furnace top load place, etc. 50 to 80% of the smoke in the field.