加磷高强IF钢炼钢工艺控制研究
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摘要
针对加磷高强IF钢生产过程中发生严重的"大包套眼"难题,调整炼钢生产工艺路线为De SDe C-RH-CC,并对各工序生产过程进行优化。转炉工序确定了高拉磷模型和钢渣双改质技术;RH工序采用铝脱氧原则,带氧循环脱碳期间加入磷铁,铝脱氧结束调整锰、铌、硼、硅,最后调整钛含量;连铸工序采用无碳低硅覆盖剂和喇叭形钢包长水口加浸入式开浇技术。生产工艺优化后,加磷高强IF钢可实现中包浇铸炉数8炉,铸坯全氧水平控制在25 ppm以内,实现了加磷高强IF钢的稳定生产。
Targeting on the severe ladle clogging during the production of phosphorus adding high strength IF steel,the steel making production processes were specified as DeS-DeC-RH-CC,and the processes were optimized. The high P melting model and double modification technology of slag were used in converter; the principle of aluminum deoxidization was adopted in the RH process,adding phosphorus iron during the decarbonization of oxygen cycle,adjusting Mn,Nb,B and Si after the deoxidation of aluminum,and finally adjusting the titanium content; non-carbon low Si covering agent were used and horn type ladle long nozzle with immersing open casting technology was adopted in continuous casting process. After implementation of these actions,the production was reached 8 heats per tundish,and total Oxygen content was controlled within 25 ppm,which had achieved stable production of phosphorus adding high strength IF steel.
Targeting on the severe ladle clogging during the production of phosphorus adding high strength IF steel,the steel making production processes were specified as DeS-DeC-RH-CC,and the processes were optimized. The high P melting model and double modification technology of slag were used in converter; the principle of aluminum deoxidization was adopted in the RH process,adding phosphorus iron during the decarbonization of oxygen cycle,adjusting Mn,Nb,B and Si after the deoxidation of aluminum,and finally adjusting the titanium content; non-carbon low Si covering agent were used and horn type ladle long nozzle with immersing open casting technology was adopted in continuous casting process. After implementation of these actions,the production was reached 8 heats per tundish,and total Oxygen content was controlled within 25 ppm,which had achieved stable production of phosphorus adding high strength IF steel.
引文
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[3]蔡开科.转炉-精炼-连铸过程钢中氧的控制[J].钢铁,2004,(8):49~57.
[4]李波,李梦英,冯慧霄,等.超低碳钢RH精炼过程中钢水氧位异常原因与控制[J].河北冶金,2017,258(6):53~56.
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[2]刘曙光,杨晓江,张大勇.转炉炼钢喷溅原因及预防措施[J].河北冶金,2012,(9):56~59.
[3]蔡开科.转炉-精炼-连铸过程钢中氧的控制[J].钢铁,2004,(8):49~57.
[4]李波,李梦英,冯慧霄,等.超低碳钢RH精炼过程中钢水氧位异常原因与控制[J].河北冶金,2017,258(6):53~56.
[5]唐向东.深冲钢夹杂物控制研究[J].连铸,2005,(4):18~19.
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