漩流氧枪转炉炼钢熔体的喷溅行为

 转炉冶炼过程金属熔体的喷溅对于转炉反应器的性能有重要影响。氧枪作为氧气射流的产生及控制单元,决定了转炉吹炼过程熔体的喷溅行为。通过水模型试验,研究了漩流氧枪转炉冶炼过程熔体的喷溅,考察了氧枪喷孔扭转角设计及操作参数下熔体喷溅速率和喷溅的空间分布规律,基于此,分析了漩流氧枪对转炉反应器性能的影响。结果表明,相比于传统氧枪吹炼,漩流氧枪吹炼时熔体喷溅速率降低,喷溅高度下降,喷溅在径向空间分布趋于均匀,且随着喷孔扭转角的增大,该分布规律变化更为显著,扭转角大于20°时,喷溅到炉口及炉外的熔体降为零。漩流氧枪吹炼时,喷溅速率及喷溅量在不同径向和高度位置处分布随着顶吹气量的增大而增大,受枪位的影响规律与扭转角有关。

Melt splashing behavior of steelmaking converter with nozzle-twisted lance

In BOF steelmaking, the splashing of molten steel has a significant influence on the performance of the converter reactor. Oxygen lance is the operation unit that generates supersonic oxygen jets and controls their behavior and plays a critical role in controlling the splashing. The splashing of steelmaking converter with a nozzle-twisted lance was studied with water model experiments. The effects of the nozzle twist angle design of the nozzle-twisted lance and its operation parameters on the splashing rate and spatial distribution of splashing were discussed. And on this basis, the effect of nozzle-twisted lance on the performance of the converter reactor was analyzed. The results show that, compared with the splashing rate in converter with traditional oxygen lance, the splashing rate and height in the converter with the nozzle-twisted lance decreases. Also, the distribution of splashing droplets in radial space is more uniform. This splashing distribution trend is more pronounced with the increase of the nozzle twist angle. The melt quantity splashed onto the converter mouth and out of the converter is decreased to zero when the nozzle twist is bigger than 20°. For the converter with a nozzle-twisted lance, the splashing rate as well as the radial and vertical distribution of splashing quantity increase with the increase of top blowing flow rate but have a dynamic effect by the lance height depending on the nozzle twist angle.