自旋转氧枪对熔池混匀时间影响的冷态模拟

Cold simulation of a self-rotating oxygen lance on mixing time of molten bath

针对传统氧枪对熔池搅拌能力有限,无法高效冶炼磷含量较高铁水的问题,设计一种新型自旋转氧枪,并建立了相应的冷态模拟系统,对比研究了自旋转氧枪与传统氧枪对熔池混匀时间的影响规律。结果表明,随着顶吹、底吹流量的提高以及枪位的下降,熔池混匀时间均缩短;自旋转氧枪对熔池的搅拌效果明显优于传统氧枪,熔池流场更加均匀;转速分别为0、3.14~5.23、7.33~9.42、11.51~13.61 rad/s时,混匀时间分别降低12.0%、23.8%、24.4%、8.1%;能量密度的变化对混匀时间的影响小于传统氧枪。

In order to solve the problem that the traditional oxygen lance had a limited stirring capacity in the molten bath,and it was difficult to smelt the molten iron with a high phosphorus content,a new type of self-rotating oxygen lance was designed,and a corresponding cold state simulation system was established.The effect of the self-rotating oxygen lance and the traditional oxygen lance on the mixing time of the molten bath was comparatively studied.The result shows that the mixing time of the molten bath reduces with the increase of top-blowing and bottom-blowing flow rates,and the drop of the lance position.The stirring effect of the self-rotating oxygen lance on the molten bath is obviously better than that of the traditional oxygen lance,and the flow field of the molten bath is uniform.When the rotation speed is 0,3.14-5.23,7.33-9.42,11.51-13.61 rad/s,the average mixing time reduces by 12.0%,23.8%,24.4%and 8.1%,respectively.The change of energy density has less influence on mixing time than that of traditional oxygen lance.