底吹冰铜吹炼炉中气-液流动状况的数学模拟

采用Eulerian-Eulerian模型描述了底吹冰铜吹炼炉内气液两相流行为,在模拟结果与实测结果一致的基础上,对双喷嘴在不同喷气角度下熔池内的气液两相流行为及气体含量进行模拟计算与比较.结果表明:随着喷吹角度的增大,喷溅情况相应有所减弱,在14°对喷角度下的喷溅现象最为严重.随着双喷嘴对喷角度的增大,射流轴线横向穿透距离增大,湍动能的分布区域也相应增大,气泡在容器中停留时间增加.但当夹角超过一定范围后,继续增大角度会使喷嘴口距离液面垂直距离减小,气泡在熔池中的停留时间反而减小,其中28°对喷角度下,熔池中的气体体积分数最大,而且湍动能分布范围最广.

Numerical Simulation of Gas-Liquid Flow Behavior in a Copper Matte Bottom-Blowing Converter

The gas-liquid two-phase flow behavior in the copper matte bottom-blowing converter was described with the Euler-Euler model,and the simulation results are consistent with the measured results.On this basis,the gas-liquid two-phase flow behavior and the gas volume at different jet angles with double nozzles were described.The results showed that the splash decreases with the increasing of jet angles with double nozzles.When the jet angle is 14 degrees,the splash is the most serious.The transverse penetration distance of gas-liquid jet trajectory and the distribution area of turbulent kinetic energy increase with the increasing of jet angles,and the residence time of the gas phase in the pool increases.However,after the jet angle exceeds a certain range,the vertical distance from the jet nozzle to the liquid surface decreases when the jet angle continues to increase.Then the residence time of gas phase in the pool is shortened.When the jet angle is 28 degrees,the gas volume fraction is the highest and distribution of the turbulent kinetic energy is the largest.