承德100 t顶吹脱磷钢包流场特性研究

利用水力学模型及数值模拟软件研究了倾角式顶吹单孔氧枪对脱磷钢包内熔池流场所造成的影响,并且研究了倾角角度分别为39o、41o、43o、45o和17o的单孔氧枪对熔池的搅拌效果和冲击特性。研究表明：适当的倾斜角有利与熔池脱磷反应的进行,过大及过小的倾斜角会分别减小冲击深度及冲击直径导致熔池脱磷速率降低。当采用43o顶吹氧枪喷头喷吹时,冲击深度及冲击面积适中,熔池混匀时间及死区体积最小,钢液的平均流动速度最大,有利于促进钢包脱磷过程磷元素的扩散,从而提高脱磷效率。工业试验结果表明,43o脱磷氧枪具有更好熔池搅拌能力,在提高脱磷效果的同时降低了冶炼过程中的钢铁料消耗。

Characteristics of flow field in 100 t dephosphorization ladle furnace with top lance

Characteristics of flow field and stirring effects of top lance with various tilt angles ( Tilt angles were 39o, 41o, 43o, 45o and 47o, respectively) on the molten bath were studied using water experiment and Fluent software. It was found that appropriate tilt angle could improve dephosphorization process, and too large and too small reduced the impacting depth and impacting diameter, respectively, leading to decrease in dephosphorization rate. When injecting by the 43o oxygen lance, impacting depth and impacting diameter were medium, mixing time and volume of dead-zone were the minimum and average flow velocity of molten bath was the big-gest. This is helpful to promote phosphorus dispersion in dephosphorization ladle furnace and improve the dephosphorization rate. Based on the results of industrial application research, the 43o oxygen lance could stir the molten bath better, increase the dephospho-rization rate and reduce the consumption of hot metal and scrap.