【作者】 耿佃桥； 雷洪； 刘爱华； 赫冀成； 俞洋； 于雷；

【Author】 GENG Dian-qiao~1 LEI Hong~1 LIU Ai-hua~2 HE Ji-cheng~1 YU Yang~1 YU Lei~1 (1.Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University, Shenyang,Liaoning,110004,China;2.School of Materials Science and Metallurgy,Northeastern University, Shenyang,Liaoning,110004,China)

【机构】 材料电磁过程研究教育部重点实验室东北大学； 材料与冶金学院东北大学；

【摘要】 为深入了解RH真空精炼的合金化、脱碳和脱气过程,本文建立了与RH-精炼装置原型1:5.5比例的水模型。在不改变RH精炼装置内流场的条件下应用超声波流量计测定循环流量;通过在真空室液面加入NaCl饱和溶液作为示踪剂,应用电导率仪测定电导率值的变化,以电导率变化不超过稳定值的±5%所需时间作为混合时间。应用NaOH-CO₂溶液体系模拟脱碳过程,通过测定实验过程中的PH值计算CO₂浓度的变化,从而获得气液反应的容积传质系数。结果表明,循环流量、溶氧和脱碳速率、容积传质系数随提升气量的增大而增大,均混时间随提升气量的增大而减小。更多还原

【Abstract】 In order to have a deep insight into the transfer phenomena in RH,a 1:5.5 scale water modeling of the prototype has been developed to investigate the alloying,decarburization and degassing process.The circulation flow rate is measured by the ultrasonic flow meter.Such a measurement method does not affect the flow field in RH vacuum refining degasser.The NaCl saturated solution is added at the free surface in vacuum chamber as the tracer and the digital conductivity meter has been employed to record the variation of tracer concentration.The mixing time is defined as the maximum time for the tracer concentration to fall continuously within a 5 pct deviation of the homogeneous value.The NaOH-CO₂ solution system is used to study the decarburization process.The volumetric mass transfer coefficient is obtained by the change of CO₂ concentration calculated by the PH value during experimental process.The results shows that with the increasing gas flow rate,the recirculation flow rate,oxygen absorption rate,decarburization rate and volume mass transfer coefficient increases,but the mixing time decreases.更多还原