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Fundamentals and Practice for Producing Low Nitrogen Steels

机译:生产低氮钢的基本原理和实践

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In general, the refining reactions in steelmaking are well understood and most elements can be controlled by the proper slag practice. However, the nitrogen reaction is complex and its content difficult to control. A recently developed model for computing the removal of nitrogen in OSM is presented along with results quantifying the effect of scrap, stirring gas, and oxygen purity. For the EAF, nitrogen is also removed by CO formation by the carbon-oxygen reaction and a model for the rate is presented. However, recent work shows that the CO evolved from DRI comes off in the slag and is not effective in actually removing nitrogen from the atmosphere. Nitrogen control in ladle processing is discussed, including a new model for vacuum tank or ladle degassing for nitrogen.
机译:一般而言,炼钢中的精炼反应已广为人知,并且大多数元素可以通过适当的炉渣实践来控制。然而,氮反应是复杂的并且其含量难以控制。提出了最近开发的用于计算OSM中氮去除量的模型,以及量化废料,搅拌气体和氧气纯度的影响的结果。对于EAF,也通过碳-氧反应通过CO的形成除去氮,并给出了速率模型。但是,最近的工作表明,从DRI释放出的一氧化碳会从炉渣中散发出去,实际上不能有效地从大气中除去氮。讨论了钢包加工中的氮控制,包括用于真空罐或钢包脱氮的新模型。

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