100t转炉用含钛铁水冶炼高碳钢的留渣+单渣操作实践  

Operational Practice of Heel Slag+Single Slag for Steelmaking High Carbon Steel in 100t BOF with Titanium-Bearing Hot Metal

作　　者：翟勇强 王建伟 张毅[1] 夏朝开[1] 王琳松[1] 高长益 Zhai Yongqiang;Wang Jianwei;Zhang Yi;Xia Chaokai;Wang Linsong;Gao Changyi(Shuicheng Iron and Steel Group Corp,Liupanshui 553028;Manufacture Management Department,Shuicheng Iron and Steel Group Corp,Liupanshui 553028)

机构地区：[1]水城钢铁集团公司,六盘水553028 [2]水城钢铁集团公司制造管理部,六盘水553028

出　　处：《特殊钢》2020年第5期29-33,共5页Special Steel

摘　　要：针对100 t转炉用含钛铁水冶炼高碳钢的前期成渣难于熔化、脱磷率低的问题,分析了含钛铁水转炉炼钢的成渣过程和炉渣的物理特性,开发了留渣+单渣工艺技术。循环利用终点炉渣,充分发挥渣中10%~13%FeO高(FeO)含量的特点,快速把含钛铁水冶炼前期的CaO-TiO2-SiO2三元渣系转变为CaO-TiO2-SiO2-FeO四元渣系,脱除钢中大部分磷。控制终渣碱度大于3.2、(TiO2)含量小于5%,使转炉出钢[C]≥0.20%、[P]≤0.014%,转炉炼钢脱磷率达到88%~92%,石灰消耗下降到28 kg/t钢。Aiming at the problems such as difficult melting of slag and low dephosphorization rate at the early stage of steelmaking high carbon steel in 100 t BOF(basic oxygen furnace) with titanium-bearing hot metal,the slagging process and the slag physical characters of BOF steelmaking with titanium-bearing hot metal are analyzed,the technology of heel slag+single slag is developed,i.e.The terminal slag is recycled to use,to full play the character of high FeO content of 10%~13% FeO in the terminal slag,the CaO-TiO2-SiO2 ternary slag system in the early stage of steelmaking of titanium-bearing hot metal is rapidly converted into the CaO-TiO2-SiO2-FeO quaternary slag system,so that most of phosphorus in steel is removed.The basicity of terminal slag is controlled to be more than 3.2,the TiO2 content in terminal slag is controlled to be less than 5%,the BOF tapping [C]≥0.20% and tapping [P]≤0.014%,the dephosphorization rate of steelmaking in BOF reaches to 88%~92%,and the consumption of lime decreases to 28 kg per ton of steel.

关 键 词：100T转炉 含钛铁水 高碳钢 留渣操作 单渣操作 

分 类 号：TF713[冶金工程—钢铁冶金]