淮钢特殊钢大型圆坯连铸工艺装备特点及实践

淮钢生产碳素、合金结构钢、锚链钢、轴承钢、齿轮钢及低合金高强度钢生产流程为80 t转炉-90 t LF-100 t RH-喂线-Φ380～Φ600 mm圆坯CC工艺。中间包容量40 t,自动控制弧形管式结晶器液面,喷水+气雾2次冷却,M-EMS+F-EMS电磁搅拌,连铸机拉速0.3～0.8 m/min,年生产能力120万t圆铸坯。文中介绍中间包、结晶器、电磁搅拌、二次冷却的设备特点和相关工艺的优化和圆坯冶金质量的改善。

Equipment Characteristics and Practice of Continuous Casting Process for Large Round Bloom of Special Steels at Huaigang

The flow sheet of production for carbon and alloy structural steel, mooring chain steel, bearing steel, spring steel and HSLA steel at Huaigang is 80 t converter-90 t LF-100 t RH-wire feeding-Φ 380 ~Φ600 mm round bloom CC process. With 40 t tundish, auto control of liquid level in curved tube type mold, water spraying + fine spraying secondary cooling, M-EMS + F-EMS electromagnetic stirring and casting speed 0.3 ~0.8 m/min, the annual production capacity of round casting bloom is L 2 million ton. The characteristics of equipment and relative process optimum including tundish, mold, electromagnetic stirring and secondary water cooling and the improvement of round bloom metallurgical quality are presented in this article.