Abstract: The results of process during tapping of low carbon aluminium killed steel SPHC melted in 120 t converter, by adding 2.0-2.5 kg/t ferroaluminium (49% Al) and adding 2.5-4.0 kg/t LF solid abandoned refining slag (/% : 6.29-10.33SiO₂, 19.14-29.57A1₂O₃, 54.69-59.96CaO, 4.97-6.89MgO) to replace the liquid cleaning agent (premelted slag 一 slag modifying agent /% : 10-18A1₂O_{3 ,} 42-55CaO, ＞3.5Al, 2-5MgO, 6-10CaF₂) show that the LF abandoned refining slag melts quickly, it is available to absorb inclusions in liquid, reduce T[O], eliminate nozzle clogging and favorable to improve environment and decrease production cost.

Key words: Utilization of LF Abandoned Refining Slag, 120 t Converter, Slag Washing, Process Practice

摘要： 120 t转炉冶炼低碳铝镇静钢SPHC的出钢过程中向底吹氩的钢包中加2.0~2.5 kg/t铝铁(49%Al)，并加入2.5~4.0 kg/t LF精炼固态弃渣(/%:6.29~10.33SiO₂，19.14~29.51 Al₂O₃，54.69~59.96CAO，4.97~6.89MgO)以替代钢水净化剂(预熔渣-钢渣改质剂/%:10~18Al₂O₃,42~55CaO，＞3.5Al，2~5MgO，6~10CaF₂)的生产结果表明，LF精炼弃渣，化渣迅速，有利于吸附夹杂物，降低T[O]，消除水口结瘤，有利于改善环境和降低成本。

关键词: LF精炼弃渣利用, 120 t转炉, 渣洗, 工艺实践