CO2在钢铁工业资源利用现状

钢铁生产过程CO₂的资源利用问题将对我国CO₂减排任务的完成起到重要作用.以CO₂在钢铁工业中的资源化利用为出发点，分析了国内外CO₂气体作为反应气体、搅拌气体及保护气体等在钢铁生产过程中的应用现状. CO₂用作反应气体主要应用在BOF转炉炼钢、不锈钢生产及钢渣碳酸化处理；CO₂用作搅拌气体主要应用于转炉底吹、钢包搅拌及LF炉精炼；CO₂用作保护气主要应用在出钢、中间包及连铸等工序.利用CO₂用于钢铁生产具有成本低、热力学条件好、密度大、搅拌能力强及实现CO₂资源利用等优点，CO₂喷吹之后反应体系中CO₂的利用率需进一步研究. 

Utilization status of CO2 in iron and steel industries

The resource utilization of CO₂ in the steel production process plays an important role in the completion of China's CO₂ emission reduction. Taking the resource utilization of CO₂ in the steel industry as the starting point, the application status of CO₂ at home and abroad as reaction gas, stirring gas and protective gas in steel production process was analyzed. CO₂ is used as a reaction gas mainly in BOF converter steelmaking, stainless steel production and steel slag carbonation; CO₂ is used as a stirring gas mainly for converter bottom blowing, ladle mixing and LF furnace refining; CO₂ is used as shielding gas mainly in tapping, tundish and continuous casting and other processes. The use of CO₂ for steel production has the advantages of low cost, good thermodynamic conditions, high density, strong stirring ability and utilization of CO₂ resources. The utilization of CO₂ in the reaction system after CO₂ injection needs further study.