【摘要】 以转炉熔池模型为对象,用激光多普勒测速仪对熔池内不同工况下的速度分布和循环流量进行了测试和研究。试验工况包括:不同比例的水和甘油配成四种不同粘度的液体进行对比和熔池表面加渣与不加渣对比。每一情况都分别在四种流量条件下进行了测试。试验表明:(1)底吹流量改变时,熔池流场的速度大小有变化,但速度分布相似。(2)熔池表面加上液体渣后,循环流量降低10%左右,其影响程度与渣层的厚度和性质有关。(3)熔池内的液体是水或性质相近的液体时,循环流量大约与底吹气量的1/4次幂成正比。这一关系对有渣或无渣都适用。(4)熔池的循环流量与熔池内液体的运动粘性系数的0.06次幂成正比,这说明熔池内液体的粘度对搅拌混合影响不大,只有粘度相差1～2个数量级时影响才显著。更多还原

【Abstract】 The velocity distributions in the bath of a bottom blown converter model measured by usingLDV(Laser Doppler Velocimeter).Based on these data recirculating flow rate was calculated.Theliquid mixtures with four different ratios of water to glycerine were used in the experiments.Li-quid paraffin was selected as slag to investigate the influence of with and without slag on thesurface of liquid.Each experimental situation was carried out with four gas flow rates respectively.It was found that the velocity distributions in the bath for different gas flow rate are similarwhile the magnituds of velocity are changed.The recirculating flow rate with slag on the bath surface is about 10 percent lower than thatwithout it.The thickness and characteristics of the slag have influence on the bath flow.When water or viscosity-similar liquid is used in the bath,the recirculating flow rate is dire-ctly proportional to 1/4 power of the bottom blown gas rate.The viscosity of liquid has only a slight effect on the agitation process in the bath,becausethe recirculating flow rate is only proportional to 0.06 power of its kinematic viscosity.更多还原