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研究了铸机矫直区现行喷嘴布置对板坯冷却效果的影响,并在喷嘴自动化测试平台上进行一系列喷嘴的组合实验,从喷嘴流量、喷射高度和水压三个方面探讨了相邻喷嘴喷淋水重叠度与水量在板坯宽度方向分布均匀性的关系.在此基础上,对现行的二次冷却系统提出了优化方案.实验结果表明,优化后,铸坯角部横裂基本消除,铸坯中心偏析从B类1.0减轻至C类1.5,其等轴晶比例提高了4.1%,明显地改善了铸坯的内部质量.
The influence of the nozzle arrangement on the cooling effect of the slab in the straightening zone of the caster was studied. A series of nozzle combination experiments were carried out on the nozzle automation test platform. The effects of the nozzle distance, spray height and water pressure on the adjacent nozzle The relationship between spray water overlap and water distribution in the width direction of slab.Based on this, the optimization scheme of the existing secondary cooling system is put forward.The experimental results show that after optimization, the transverse crack at the corner of slab is basically eliminated , The slab center segregation reduced from Class B 1.0 to C 1.5, the equiaxed ratio increased by 4.1%, which obviously improved the internal quality of slab.