水口浸入深度对CSP结晶器内流场的影响

为了解决高拉速生产条件下CSP板坯表面质量问题,利用数值计算软件FLUENT针对某厂CSP连铸机水口插入深度对结晶器流场及液面波动的影响进行了数值模拟研究。研究结果表明,不同的水口浸入深度结晶器内流场基本相同,增加水口浸入深度对结晶器流场影响不明显,水口浸入深度的大小直接决定了从水口流出的流股撞击结晶器窄面位置的高低,同时得出,当水口浸入深度从300、340增大到380 mm时,液面处最大流速分别为0.180、0.160和0.127 m/s;增大水口浸入深度,结晶器上回流对结晶器液面的扰动将减弱,对应的卷渣次数减少。

Influence of nozzle immersion depth on liquid steel flow in CSP mould

In order to solve the problem of CSP slab surface quality under high-speed production conditions, the liquid steel flow and level fluctuation of the CSP mould has been studied by numerical calculation method with FLUENT for the CSP continuous caster of a factory. The research results show that the flow field in the mould is basically the same when different nozzle immersion depths. Increasing the nozzle immersion depth has no obvious effect on the mould flow field. The immersion depth of the nozzle directly determines the position where the stream flowing from the nozzle hits the narrow surface of the mould. Furthermore, when the immersion depth of the nozzle increases from 300, 340 to 380 mm, the maximum flow velocity at the liquid level is 0.180, 0.160 and 0.127 m/s respectively. When the nozzle is immersed in depth, the disturbance of the mold backflow on the mould level fluctuation will be weakened, and the corresponding number of slag coiling will be reduced.