针对方坯连铸过程中产生的连铸坯中心偏析问题，日钢第一炼钢厂采取了一系列控制措施，如减少钢液成分波动、降低中间包内钢液过热度、制定合适的拉速和温度匹配制度并保持恒拉速、优化结晶器电磁搅拌参数、控制合适的二冷强度、使用凝固末端电磁搅拌等，使高碳钢铸坯中心偏析明显改善，w[C]≥0.60%的高碳钢中心碳偏析（≤1.5级）合格率100%。%A series of measures were taken to solve the problem of central carbon segregation in billet in No.1 Steelmaking Plant of Rizhao Iron and Steel Co., Ltd., including reducing the liquid steel composition fluctuation, decreasing the superheat of hot metal in the tundish, developing an appropriate matching system of casting speed and temperature, keeping a constant casting speed, optimizing mould electromagnetic stirring parameters, controlling suitable secondary cooling strength, using the solidification end electromagnetic stirring and so on. The central segregation in high carbon steel billet was obviously improved. The pass rate of central carbon segregation (≤1.5 level) of high-carbon steel with≥0.60%carbon content is 100%.
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