多断面方坯连铸机设计及生产实践

针对多断面方坯连铸机的生产实际,从工艺和设备设计角度并结合生产实践提出如下思路。二冷区总长度设计为7 685 mm,分四区,并将第四区细化为四区＋四区延长区以适应多断面、多钢种较高拉速生产;二冷各区分配比定为0.33-0.39-0.19-0.09(四区延长区关闭)和0.35-0.39-0.12-0.14(四区延长区打开),比水量范围为0.3～1.2 L/kg;独特的二冷全水和气雾喷嘴快换装配结构可节省断面更换时间至2.5 h;兼顾各断面生产的末端电磁搅拌最佳安装位置为距离弯月面9.2 m处。按上述思路设计的多断面方坯连铸机可实现较高拉速生产,铸坯质量良好,连铸机作业率高,并为同类型连铸机改造或设计提供实践经验。

Design and production practice of multi-section billet caster

According to the production practice of multi-section billet caster, from the point of view of process and equipment design and production practice, the following ideas are put forward. The total length of the secondary cooling zone is 7 685 mm and divided into four zones, and the fourth zone is refined into the fourth zone + the extension zone of the fourth zone to adapt to the production of multi-section and multi-steel with higher casting speed. The distribution ratio of the secondary cooling zone is 0.33-0.39-0.19-0.09 (the extension zone of the fourth zone is closed) and 0.35-0.39-0.12-0.14 (the extension zone of the fourth zone is opened) and the water ratio ranges from 0.3 to 1.2 L/kg. The unique quick change assembly of complete wanter and mist nozzle for secondary cooling can save section change time up to 2.5 h. The best installation position of final electromagnetic stirring of each sectional production is 9.2 m from the meniscus. The full leaf spring hydraulic vibration and continuous straightening technology are adopted. The multi-section billet caster designed according to the above ideas can achieve high casting speed, good quality billet, high operation rate of continuous caster, and provide practical experience for the transformation or design of the same type of continuous caster.