Abstract: The process practice of silicon-calcium wire(φ13 mm)feeding and aluminum wire feeding with feeding speed 2.4~3.0 m/min in a 90 t ladle for stcel 20,34Mn6 and steel BTN/1 produced by LD-LF(WF)-CC flow sheet has been summarized. The practice showed that as calcium feeding amount was up to 200×10^-6,the residual calcium content in steel was up to maximum value -35×10^-6 with calcium treatment the molten steel average deoxidizing ratio was 25%, the inclusion amount in steel decreased and inclusion morphology modifed obviously; and as feeding aluminium wire,with feeding wire speed increased from 1.5 m/s to 3.0 m/s,the aluminium yield increased from 25% to 70%.The yield of aluminium normally was 60%～70% and the yield of CaSi was 15%~20%.

Key words: Ladle, Refining, Wire Feeding

摘要： 总结了以LD-LF(WF)-CC生产流程生产20、34Mn6、BTN/1等钢时,在90 t钢包中以2.4~3.0m/min的喂丝速度喂硅钙线(Φ13 mm)和铝线的工艺实践。工艺实践表明,当喂入钙量达200×10^-6时,钢中残余钙含量至最大值35×10^-6,钙处理时钢水平均脱氧率为25%,钢中夹杂物数量明显减少并使钢中夹杂物变性;当钢包喂铝线时,随喂丝速度由1.5 m/s提高至3.0 m/s时,铝的回收率由25%提高至70%。一般铝的收得率为60%~70%,CaSi的收得率为15%~20%。

关键词: 钢包, 精炼, 喂丝