卡尔多炉内气液两相流混合特性水模型研究  

A Water Model Study on Mixing Characteristics of Gas-Liquid Two-Phase Flow in a Kaldo Furnace

作　　者：李书鸿 黄金堤[1,2] 钟劲龙 李静 LI Shuhong;HUANG Jindi;ZHONG Jinlong;LI Jing(School of Metallurgical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Jiangxi Provincial Key Laboratory of High-Performance Steel and Iron Alloy Materials,Ganzhou 341000,China)

机构地区：[1]江西理工大学冶金工程学院,江西赣州341000 [2]高性能钢铁合金材料江西省重点实验室,江西赣州341000

出　　处：《有色金属工程》2024年第10期92-100,共9页Nonferrous Metals Engineering

基　　金：江西理工大学高层次人才科研启动项目(205200100517);国家自然科学基金资助项目(52264047);中国宝武低碳冶金创新基金(BWLCF202121);高性能钢铁合金材料江西省重点实验室(2024SSY05041)。

摘　　要：基于相似理论,构建了以工业卡尔多炉为原型1∶4.5等比例缩小的水模型。创新性地提出采用酸碱中和脱色法和量纲分析,研究了各工艺参数(气体流量Q、喷枪高度h、炉体转速ω、液相体积率φ、液相黏度μl和炉体倾角θ)对熔池内气液两相流混匀时间t的影响规律,并建立了t与D(炉体内径)、h、ω、φ、Fr′(修正弗劳德准数)、μl和θ的无量纲关系式。研究结果表明混匀时间随着气体流量的增大、枪位的降低、液相体积的增大、黏度的减小、炉体倾角的提高而减小。研究成果可为卡尔多炉的高效冶炼及优化设计提供理论参考。Based on similarity theory,a water model was constructed with a 1∶4.5 scale-down ratio compared to the industrial Kaldo furnace.Innovatively,acid-base neutralization decolorization and dimensional analysis were proposed to investigate the influence of various process parameters,including gas flow rate(Q),injection lance height(h),furnace rotation speed(ω),liquid phase volume fraction(φ),liquid viscosity(μl),and furnace tilt angle(θ),on the mixing time(t)of gas-liquid two-phase flow in the molten pool.A dimensionless mathematical relationship was established between t and D(inner diameter of the furnace),h,ω,φ,Fr′(modified Froude number),μl,andθ.The research results showed that the mixing time decreased with increasing gas flow rate,decreasing lance height,increasing liquid phase volume fraction,decreasing liquid viscosity,and increasing furnace tilt angle.The research findings may provide theoretical references for efficient smelting and optimal design of the Kaldo furnace.

关 键 词：卡尔多炉 水模型 混匀时间 酸碱中和脱色 量纲分析 

分 类 号：TF806.1[冶金工程—有色金属冶金]