无铝无取向硅钢结晶器液面波动原因分析及控制实践  

Analysis and control practice of mold level fluctuations of aluminum-free non-oriented silicon steel

作　　者：肖同达 李秀龙 孔勇江 李大明 杨光 XIAO Tongda;LI Xiulong;KONG Yongjiang;LI Daming;YANG Guang(Silicon Steel Department of Wuhan Iron and Steel Co.,Ltd.,Wuhan 430083,China;Steelmaking plant of Wuhan Iron and Steel Co.,Ltd.,Wuhan 430083,China;Technology Center of Wuhan Iron and Steel Co.,Ltd.,Wuhan 430080,China)

机构地区：[1]武汉钢铁有限公司硅钢部,湖北武汉430083 [2]武汉钢铁有限公司炼钢厂,湖北武汉430083 [3]武钢有限技术中心,湖北武汉430080

出　　处：《电工钢》2025年第2期50-54,共5页ELECTRICAL STEEL

摘　　要：无铝成分体系无取向硅钢连铸过程结晶器液面波动幅度达±10 mm,严重影响连铸坯质量及浇铸安全。通过高温力学模拟及拉伸试验对无铝体系无取向硅钢导热系数、体积模量、延伸率等进行了分析,板坯冷却温度区间1080~1250℃内奥氏体析出比例达44%。该钢连铸时扇形段内铸坯鼓肚是结晶器液面波动的主要原因。通过采取降低中间包温度、成分精准控制、二冷水流量优化等措施,结晶器液面波动≤±3 mm比例由58.6%提高到99.5%。During the pouring process of aluminum-free and non-oriented silicon steel,the liquid level fluctuation range of the mold reaches±10 mm,which seriously affects the quality of the slab and the production of the slab.The thermal conductivity,bulk modulus and elongation of aluminum-free steel were analyzed by high-temperature mechanical simulation and tensile test,and the proportion of austenite precipitation in the slab condensation temperature range of 1080~1250℃ was 44%.The bulging belly of the billet in the fan-shaped section is the main reason for the fluctuation of the liquid level of the mold during continuous casting.By reducing the tundish temperature,accurately controlling the refining components,and optimizing the flow rate of the secondary cold water,the proportion of the liquid level fluctuation≤±3 mm of the mold was increased from 58.6% to 99.5%.

关 键 词：无取向硅钢 液面波动 二冷水 鼓肚 奥氏体 

分 类 号：TF762[冶金工程—钢铁冶金]