CO2资源化用于钢液精炼的研究进展

将CO₂用于钢液精炼是CO₂资源化应用于炼钢流程的重要补充。基于CO₂用于钢液精炼的最新研究进展,分析了CO₂气体在精炼钢液中冶金反应行为,重点综述了常压以及真空精炼过程,CO₂作为保护气体、搅拌气体或反应气体等在炉外精炼过程中的应用现状。常压条件下,CO₂可防止钢液增氮、调控钢液氧化性并延长底吹元件寿命;真空条件下,CO₂不仅能够发挥常压下的作用,且钢液深脱碳、脱气以及去除夹杂物方面的效果更加显著。最后,指出了目前CO₂资源化用于精炼过程中面临的问题,认为未来CO₂资源化用于精炼过程的研究应从以下2个方面展开：1)优化CO₂喷吹工艺;2)深入研究CO₂参与炼钢反应的基础理论。

Research progress of CO2 resource use for molten steel refining

The use of CO2 for molten steel refining is an important supplement to the application of CO2 resources in the steelmaking process. Based on the latest research progress of CO2 used in molten steel refining, the metallurgical reaction behavior of CO2 gas in refining molten steel was analyzed, focusing on the use of CO2 as a protective gas, stirring gas or reaction gas in normal pressure and vacuum refining processes, and the application status in the process of refining outside the furnace. Under normal pressure conditions, CO2 can prevent nitrogen growth in molten steel, regulate the oxidation of molten steel, and extend the lifespan of bottom blow components; Under vacuum conditions, CO2 can not only play its role under normal pressure, but also deeply decarburize, degas, and remove molten steel. The effect of inclusions is more pronounced. Finally, the problems currently faced in the use of CO2 resources in the refining process were pointed out, and the future research on CO2 resource use in the refining process was suggested from the following two aspects: 1) Optimizing the CO2 injection process; 2) In-depth study of CO2 participation basic theory of steelmaking reactions.