顶吹转炉中高磷铁水脱磷工艺研究  

Study on dephosphorization process with middle and high phosphorus hot metal in top-blowing converter

作　　者：丁宁[1] 孟义春[2] 李宁[2] 韩学义 王勇[1] 姜卓豪[2] DING Ning;MENG Yichun;LI Ning;HAN Xueyi;WANG Yong;JIANG Zhuohao(Shougang Research Institute of Technology,Beijing 100043,China;Steel Making Plant,Shougang Changzhi Iron and Steel Limited Company,Changzhi 046031 Xhina)

机构地区：[1]首钢技术研究院,北京100043 [2]首钢长治钢铁有限公司炼钢厂,山西长治046031

出　　处：《炼钢》2021年第5期6-11,28,共7页Steelmaking

摘　　要：研究了顶吹转炉双渣法冶炼中高磷铁水的工艺方案,并进行了工业试验。通过合理搭配铁矿石、废钢和氧气比例,抑制熔池温度,分析了冶炼过程需要控制的关键因素。结果表明:在铁水磷质量分数为0.12%~0.15%条件下,半钢渣碱度控制在2.0~2.3,TFe质量分数控制在15%~18%;终点渣碱度控制在3.0~3.5,TFe质量分数控制在15%~18%,半钢倒渣量40%~60%,可以使转炉终点磷质量分数控制在0.008%。The process scheme of dual slag smelting with middle and high phosphorus hot metal in the top blown converter was studied,and industrial test was carried out.The temperature of molten pool could be restrained by controlling the reasonable proportion of iron ore,scrap steel and oxygen.Some key factors of operating system during the blowing process were analyzed through the industrial experiments.The results showed that,when phosphorus mass fraction in the hot metal was 0.12%to 0.15%,basicity and w(TFe)of half steel slag controlled within 2.0 to 2.3 and 15%to 18%respectively;basicity and w(TFe)of slag at end point controlled within 3.0 to 3.5 and 15%to 18%respectively;deslaging quantity of semi steel was within 40%to 60%,and the phosphorus mass fraction at end point of converter could be controlled at 0.008%.

关 键 词：中高磷铁水 双渣 深脱磷 顶吹转炉 

分 类 号：TF704.4[冶金工程—钢铁冶金]