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本文论述了高铬不锈钢的一种新脱磷工艺试验研究的结果。这种工艺的特点是在还原条件下,用氩气作载体,将CaC_2、CaSi或CaC_2+CaSi粉剂作脱磷剂,喷入钢液中进行脱磷。在工业条件下,粉剂喷入量为45～50kg/t,开始喷吹温度1500～1530℃时,对于ZG1Cr18Ni9Ti不锈钢,脱磷率达到74～89％,处理后,钢中磷含量可降到0.005～0.010％;对于ZG1Cr18Mn9Ni3Mo3Cu2N不锈钢,脱磷率达到71～78％,处理后,钢中磷含量可降到0.013～O.14％。并分析了钢液温度,含氧量、化学成分,以及炉衬材料等冶金因素对高铬不锈钢脱磷效果的影响。
This article discusses the results of a new dephosphorization pilot study of high chromium stainless steel. This process is characterized by reduction conditions, with argon as a carrier, CaC_2, CaSi or CaC_2 + CaSi powder as dephosphorization agent, sprayed into the molten steel for dephosphorization. Under industrial conditions, when the powder injection amount is 45-50 kg / t and the injection temperature is 1500-1530 ° C, the dephosphorization rate reaches 74-89% for the ZG1Cr18Ni9Ti stainless steel. After treatment, the phosphorus content in the steel can be reduced to 0.005 ~ 0.010%. For the ZG1Cr18Mn9Ni3Mo3Cu2N stainless steel, the dephosphorization rate reaches 71-78%. After treatment, the phosphorus content in the steel can be reduced to 0.013-0.14%. The effects of metallurgical factors such as temperature of liquid steel, oxygen content, chemical composition and lining material on dephosphorization of high chromium stainless steel were analyzed.