提高唐钢FSTC薄板坯连铸机拉速实践

Practice to raise cating speed in FSTC thin-slab caster of Tangsteel

为提高唐钢FSTC薄板坯连铸机拉速,采用了精准控制钢水成分和温度,开发高拉速专用保护渣,优化浸入式水口和结晶器结构,应用电磁制动技术等措施,使铸机最高拉速由4.5提高至6.0 m/min,且提拉速后铸坯表面质量良好,内部组织无偏析、缩孔、疏松等缺陷,生产的热轧卷具有良好的组织和性能。

In order to raise casting speed in FSTC thin-slab caster of Tangsteel,some measures were taken,such as ensuring a reasonable composition and temperature of molten steel,developing new type of mould powder for high casting speed production of caster,optimizing the structure of submerged nozzle and mould,applying of EMBr,etc. By means of corresponding measures,the maximum casting speed of FSTC thin-slab caster of tangsteel increased from 4.5 m/min to 6.0 m/min,and the slab has good surface quality,no defects such as segregation,porosity and shrinkage in microstructure of slab,The hot rolled coils also have good microstructure and properties.