论文部分内容阅读
在板坯连铸过程中由于水口吹氩,结晶器内的流场本质上是一个气-液两相流,如何通过磁场等手段优化结晶器内的流场结构改善铸坯质量,是个非常重要的问题。利用水银和氮气作为模拟介质,采用电阻探针研究气泡在结晶器内有、无磁场条件下的统计规律。实验表明,施加磁场后,水口附近的气泡占空比和气泡数量明显增加,减少了结晶器窄面附近的气泡分布。同样气体流量下,施加磁场后气泡占空比总和与无磁场条件下相比明显要大。
In the process of slab continuous casting, the flow field in the mold is essentially a gas-liquid two-phase flow due to the argon blowing at the nozzle. How to optimize the flow field structure in the mold by means of magnetic field is very important The problem. Using mercury and nitrogen as the simulation medium, the resistivity probe was used to study the statistical law of the bubbles in the mold with and without magnetic field. Experiments show that after the magnetic field is applied, the bubble duty cycle and bubble number near the nozzle increase obviously, which reduces the bubble distribution near the narrow face of the mold. The same gas flow, the magnetic field after the sum of bubble duty cycle compared with no magnetic field significantly larger.