摘要
围绕硅钢连铸生产过程,通过改良中间包覆盖剂工艺实现钢液中夹杂物的有效控制。采用Factsage热力学软件,模拟计算中间包覆盖剂不同种类、比例、成分条件下,钢液中液态渣和夹杂物含量的变化,以及对钢液中氧、铝含量的影响。计算结果表明,与FG-13型中间包覆盖剂相比,采用FG-5型中间包覆盖剂,每100 g钢液的液态渣含量增加0.083 4 g,氧化物含量减少0.060 57 g。使用渣钢质量比为1∶100覆盖剂时,其平均液相面积较渣钢比1.5∶100高出0.16百分点,较渣钢比2∶100高出0.58百分点,其熔渣流动性能更好,吸附杂质能力更强。采用工业试验验证改良方案,可显著降低钢样中含Al夹杂物10.9百分点。
This study focuses on the effective control of inclusions in molten steel during the continuous casting of silicon steel through the optimization of tundish covering flux.Using FactSage thermodynamic software,simulations were conducted to analyze the variations in liquid slag and inclusion content under different types,ratios,and compositions of tundish covering flux,as well as their effects on oxygen and aluminum levels in the steel.The computational results demonstrate that compared to the FG-13 type,the application of FG-5 tundish covering flux increases the liquid slag content by 0.0834 g per 100 g of steel while reducing oxide inclusions by 0.06057 g per 100 g of steel.At the ratio of covering flux to steel is 1∶100,the average liquid phase area is 0.16 percentage points higher than that at 1.5∶100 and 0.58 percentage points higher than at 2∶100,indicating improved slag fluidity and enhanced impurity absorption capacity.Industrial trials validated the optimized formulation,showing a significant reduction of 10.9 percentage points in Al-containing inclusions in steel samples.
作者
郑胜蓝
胡暑名
刘婷
赵晓波
吕宪雨
戴方钦
张清霞
ZHENG Shenglan;HU Shuming;LIU Ting;ZHAO Xiaobo;LYU Xianyu;DAI Fangqin;ZHANG Qingxia(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;Baoshan Iron and Steel Co.,Ltd,Shanghai 201900,China)
出处
《炼钢》
北大核心
2025年第6期89-96,共8页
Steelmaking
关键词
连铸
中间包覆盖剂
热力学
硅钢
夹杂物
continuous casting
tundish covering flux
thermodynamics
silicon steel
inclusions
