承钢铁水连续脱硫装置开发与结构优化

Development and Structural Optimization on Devices for Continuous Desulphurization of Iron Melt in Chengde Steel Works

为解决承钢铁水连续脱硫问题,开发了一套设备紧凑、操作方便的脱硫装置;基于湍流模型与多相流模型的耦合,对脱硫装置内铁水流动情况进行了计算模拟;分析研究了挡墙和喷枪位置对脱硫装置内铁水流动的影响.模拟结果表明:通过对挡墙和喷枪位置的优化,增加了铁水在包内的循环流动途径,使脱硫粉剂与铁水反应时间增长;在靠近脱硫装置出口位置设置挡墙,喷枪距挡墙1/2L时,脱硫装置内流场最好,可以实现铁水与脱硫剂的充分混合,从而提高了脱硫率,同时实现了渣铁自动分离.

In order to solve the problem during continuous desulphurization of the iron melt in Chengde steel works, a set of desulphurization device with compact structure and convenient operation was developed. The flow behavior of the iron melt in the desulfurization equipment was numerically simulated based on the coupling of turbulence and multiphase flow models. The effects of the position of blocking walls and injection lances on the flow of the iron melt in the desulphurization equipment were analyzed and investigated. The experimental results showed that through optimizing the positions of blocking walls and injection lances, the circling flow paths of the iron melt in the ladle was increased which lengthened the reaction time between the powder desulphuring agents and the iron melt. When the blocking walls were set up near the outlet of the desulphurization equipment and the distance between blocking walls and injection lances was 1/2L, the flow field in the desulphurization equipment is the best that the iron melt and the desulphurizer can be fully mixed, which consequently increases the desulphurization ratio, thus the automatic separation of the iron melt and the slag is synchronously achieved.