SWRCH22A冷锻钢100 t LF精炼造渣制度的分析和工艺优化

特殊钢 ›› 2016, Vol. 37 ›› Issue (3): 35-38.

SWRCH22A冷锻钢100 t LF精炼造渣制度的分析和工艺优化

高长益¹,张毅²,谢祥²,王琳松³,郑家良¹,王谦⁴

水城钢铁集团公司1技术中心;
2炼钢厂，六盘水553028；
3水城钢铁集团公司,六盘水553028；
4重庆大学材料科学与工程学院，重庆400044

收稿日期:2015-12-28 出版日期:2016-06-01 发布日期:2022-08-02
作者简介:高长益(1964-)，男，硕士( 1990年武汉钢铁学院)，高级工程师，1984年昆明工学院(本科)毕业，钢铁冶金研究。

Analysis on Slagging Schedule in 100 t LF Refining of Cold Heading Steel SWRCH22A and Process Optimization

Gao Changyi¹, Zhang Yi², Xie Xiang², Wang Linsong³, Zheng Jialiang¹, Wang Qian⁴

1 Technology Center;
2 Steelmaking Plant, Shuicheng Iron and Steel Group Corp, Liupanshui 553028；
3 Shuicheng Iron and Steel Group Corp, Liupanshui 553028 ；
4 College of Materials Science and Engineering, Chongqing University, Chongqing 400044

Received:2015-12-28 Published:2016-06-01 Online:2022-08-02

摘要/Abstract

摘要： 为减少钢中夹杂物和对夹杂物变性处理,防止连铸水口结瘤,对100 t LF 5炉SWRCH22A冷镦钢（/%:0.18~0.20C，0.44~0.62Si，0.85~0.89Mn，0.012~0.015P，0.006~0.009S，0~0.004Ca，0.000 7~0.0010B，0.011~0.088Als）夹杂物钙处理进行了Ca-Al,Al-O,Al-S,Ca-S平衡热力学计算和氧氮分析。得出1 873 K[Ca]-[Al],a[O]-[Al]和[S]-[Al]平衡曲线,1 823~1 923 K[Ca]-[S]平衡曲线,和5炉钢对应的实测值。通过分析,得出优化LF精炼工艺:（1）精炼终渣MgO=6%、SiO₂<6%、CaO/Al₂O₃=1.6~1.8;（2）转炉下渣量700 kg左右,精炼终渣量2 000 kg左右;（3）根据精炼终渣CaO/Al2O3=1.6~1.8的目标来决定造渣料的加入量;（4）避免喂钙线时钢水剧烈翻腾,并防止精炼结束到中间包过程钢水的氧化

Abstract: In order to reduce inclusions in steel and modify inclusions to prevent nozzle clogging during casting process, the equilibrium theimodynamic calculations of Ca-Al, Al-O, Al-S and Ca-S, and the analysis of oxygen and nitrogen of 5 heats 100 t LF of cold heading steel SWRCH22A (/% ： 0.18 ~0. 20C, 0. 44 ~0. 62Si, 0. 85 ~0. 89 Mn, 0.012 ~ 0. 015P, 0. 006 ~ 0. 009S, 0 ~ 0. 004Ca, 0.000 7 -0.001 0B, 0. 011 ~ 0. 088Als) by calcium treatment on inclusions in steel have been carried out. The equilibrium curves of [Ca]-[Al],a[O]-[Al] and [S] -[Al] at 1 873 K and [ Ca] -[ S] at 1 823 ~ 1 923 K are obtained and compared to corresponding measured data of 5 heats. By analysis the optimized LF refining process: (1) end refining slag- MgO = 6% , SiO₂ <6% and CaO/Al₂O₃ =1.6 ~1.8; (2) amount of BOF tapping slagging being about 700kg, amount of end refining slag being about 2 000 kg; (3) according to the aim end refining slag with CaO/Al₂O₃ = 1. 6 ~ 1. 8 to define the amount of charging slag materials; and (4) avoiding the boiling of liquid steel during feeding calcium wire process and the oxidation of liquid during process of end refining to tundish.

高长益, 张毅, 谢祥, 王琳松, 郑家良, 王谦. SWRCH22A冷锻钢100 t LF精炼造渣制度的分析和工艺优化[J]. 特殊钢, 2016, 37(3): 35-38.

Gao Changyi, Zhang Yi, Xie Xiang, Wang Linsong, Zheng Jialiang, Wang Qian. Analysis on Slagging Schedule in 100 t LF Refining of Cold Heading Steel SWRCH22A and Process Optimization[J]. Special Steel, 2016, 37(3): 35-38.

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