炼钢 ›› 2020, Vol. 36 ›› Issue (5): 14-20.

• 铁水预处理 • 上一篇    下一篇

基于KR法新型脱硫搅拌器的流场数值分析

闵昌飞1,2,但斌斌1,2,牛清勇1,2,容芷君1,2,欧阳德刚3,孙贞贞1,2   

  1. (1.武汉科技大学 冶金装备及其控制教育部重点实验室,湖北 武汉 430081;
    2.武汉科技大学 机械传动与制造工程湖北省重点实验室,湖北 武汉 430081;
    3.宝山钢铁股份有限公司 中央研究院(青山),湖北 武汉 430080)
  • 出版日期:2020-10-05 发布日期:2020-10-13

Numerical analysis of flow field based on the new desulfurization agitator of KR method

  • Online:2020-10-05 Published:2020-10-13

摘要:

为改进铁水预处理脱硫设备和工艺,提高脱硫效率,参考传统KR脱硫法,将搅拌器与喷枪的优点结合,形成了一种既搅又喷的新型搅拌器。应用Fluent软件,采用Eulerian模型对铁水罐内的流场进行数值分析,从流场速度和气体分布等方面研究了搅拌器不同的偏心度、搅拌转速、通气流量对铁水罐内脱硫效果的影响。结果表明:采用新型搅拌器,可增强流场的流动,由搅拌器底部喷嘴喷出的脱硫气体作螺旋上升运动,会使脱硫气体在铁水罐中分布范围更广且更加均匀;新型搅拌器在搅拌转速为150 r/min、通气流量为5.0 m3/h和偏心度为0.3时,气体的分布和密集程度最佳,流场具有较大的平均流速,有利于铁水与脱硫剂的反应。

关键词: 流场, KR脱硫, 气体喷吹, 数值模拟

Abstract:

In order to improve desulfurization equipment and technology of hot water pretreatmentand improve the desulfurization efficiencya new type of agitator was formed through combining the advantages of agitator and spray gun with reference to the traditional KR desulfuration method. The flow field in the hot metal tank was analyzed by Fluent software and Eulerian model. The effects of different eccentricitystirring speed and ventilation flow of the agitator on the desulfurization effect were studied from the aspects of flow velocity and gas distribution. The results showed that the new agitator could enhance the flow fieldand the desulfurization gas ejected by the nozzle at the bottom of the agitator would make the desulfurization gas spread more widely and more evenly in the iron tank. When the new agitator had a stirring speed of 150 r/minventilation flow rate of 5.0 m3/h and eccentricity of 0.3the distribution and intensity of gas was the bestand the flow field had a large average velocitywhich was beneficial to the reaction of hot metal and desulfurization agent.

Key words: flow field, KR desulfurization, gas injection, numerical simulation