Optimization of arrangement of bottom tuyeres through numerical simulation
LI Jiao1，YU Hui-xiang1，WANG Xin-hua1，GAO Pan2，LI Hai-bo2
（1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China 2. Strip Technology Department， Shougang Research Institute of Technology， Beijing 100043， China）
Abstract：In order to optimize stirring effect of converter bottom blowing， based on the converter in a steel plant， a three-dimensional Euler mathematical model was established through the commercial software Ansys-Fluent to study the effect of the number of bottom tuyeres on the mixing behaviors of the molten metal in converter. The results indicate that with 4 bottom tuyeres and large flow through each tuyere， the recirculation zone develops fully and the blocking of tuyeres can be controlled. Meanwhile， the average velocity of the molten metal is large， the coverage of weak zone， low velocity zone and dead zone are small and the mixing time is short. Therefore， 4 bottom tuyeres is the best number of the bottom tuyeres. For the distribution of 8 and 12 bottom tuyeres arranged closely， the flow fields are similar to the one of 4 tuyeres， but the energy utilization rate is lower. The arrangement of multiple tuyeres is beneficial to the mixing of upper half of the molten pool. However， with more bottom tuyeres， the flow rate of the gas through per bottom tuyere is smaller， so the mixing effect at the bottom of converter is bad. Practices show that the technical indexes of the converter are greatly improved at the end of smelting when using the arrangement of 4 bottom tuyeres， which is consistent with the results through numerical simulation.
李 姣，于会香，王新华，高 攀 ，李海波. 转炉底吹枪优化布置的数值模拟[J]. , 2018, 53(2): 32-39.
LI Jiao，YU Hui-xiang，WANG Xin-hua，GAO Pan，LI Hai-bo. Optimization of arrangement of bottom tuyeres through numerical simulation. Iron and Steel, 2018, 53(2): 32-39.
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2018, Vol. 53 
