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应用双相流理论发展了物理和数学模型,获得了RH装置中的钢液环流特性,以及几何结构因素对它的影响。发现了从RH下降管流出的液流发生周期性地摆动,而当水平移动至某一距离时,这种现象能被消除。此时,能得到最小的混合均匀时间,同时下降管液流的扩张角约为18°。进一步的水模拟试验表明,在RH钢包中喷吹气—粉时,喷枪有一个最佳的几何位置,对于RH—IJ装置中喷枪的最佳几何位置也作了测定,它与气泡流扩张角计算的结果相吻合。
The physical and mathematical models were developed using the theory of two-phase flow, and the characteristics of the molten steel circulation in the RH plant and the influence of geometrical factors on it were obtained. It was found that the flow of liquid from the RH downcomer periodically wobbled and that this phenomenon could be eliminated when moving horizontally to a certain distance. At this point, the minimum mixing time is obtained, while the divergence angle of the drop tube flow is about 18 °. Further water simulations showed that the gun had an optimal geometry when blowing gas-powder into the RH ladle and the best geometry for the gun in the RH-IJ unit was also determined, The calculated results match.