100t转炉用含钛铁水冶炼高碳钢的留渣+单渣操作实践

特殊钢 ›› 2020, Vol. 41 ›› Issue (5): 29-33.

100t转炉用含钛铁水冶炼高碳钢的留渣+单渣操作实践

翟勇强¹，王建伟¹，张毅¹，夏朝开¹，王琳松¹，高长益²

1水城钢铁集团公司，六盘水5530281
2水城钢铁集团公司制造管理部，六盘水553028

收稿日期:2020-04-20 出版日期:2020-10-01 发布日期:2022-05-05
作者简介:翟勇强(1968 -),男，硕士 ( 2006年武汉科技大学)，1991年贵州工学院(本科)毕业，髙级工程师，钢铁冶金技术研究。

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

Zhai Yongqiang¹ ,Wang Jianwei¹,Zhang Yi¹ ,Xia Chaokai¹ , Wang Linsong¹ ，Gao Changyi²

1 Shuicheng Iron and Steel Group Corp, Liupanshui 553028 ；
2 Manufacture Management Department, Shuicheng Iron and Steel Group Coip, Liupanshui 553028

Received:2020-04-20 Published:2020-10-01 Online:2022-05-05

摘要/Abstract

摘要： 针对100t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。

Abstract: 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,:, 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 ternaiy slag system in the early stage of steelmaking of titanium-bearing hot metal is rapidly converted into the Ca0-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.

Key words: , 100 t BOF, Titanium-Bearing Hot Metal, High Carbon Steel, Slag Heel Operation, Single-Slag Operation

翟勇强, 王建伟, 张毅, 夏朝开, 王琳松, 高长益. 100t转炉用含钛铁水冶炼高碳钢的留渣+单渣操作实践[J]. 特殊钢, 2020, 41(5): 29-33.

Zhai Yongqiang, Wang Jianwei , Zhang Yi , Xia Chaokai , Wang Linsong , Gao Changyi. Operational Practice of Heel Slag + Single Slag for Steelmaking High Carbon Steel in 100 t BOF with Titanium-Bearing Hot Metal[J]. Special Steel, 2020, 41(5): 29-33.