钢包底吹氩参数优化设计-冶金工程专业论文.docxVIP

东北大学硕士学位论文 东北大学硕士学位论文 摘要 钢包底吹氩参数优化设计 摘 要 本文通过水模实验研究和工业试验对济钢一炼钢43吨钢包底吹氩参数进行 了优化，主要工作分为以下两个部分。 (1)水模研究部分 在水模实验部分，测定了底吹流量、油层厚度、油层粘度、底吹孔布置方式 等吹氩工艺参数与熔池均混时间、熔池渣液面临界吹开气量及临界卷渣气量的关 系。得到了均混时间和吹气参数、渣液面临界吹开气量和吹气参数、临界卷渣气 量和吹气参数之间的关系，并且得到底吹工艺参数的最优化组合。实验结果表明， 针对济钢一炼钢的43吨钢包和本实验条件，底气孔距钢包底中心的最佳距离为 315mm，这时在相同的吹气流量时熔池的搅拌强度最大，均混时间最短。考虑临 界吹开气量和临界卷渣气量这两个因素，最佳吹氩流量为2．0Nm3／h。 (2)工业试验部分 根据水模实验的结果，在济钢一炼钢43t钢包上进行了工业试验。水模实验 的结果得到验证，吹氩过程得到进一步优化。试验结果表明，考虑到均混时间和 临界吹氩气量，采用方案7是最优的。 关键词钢包吹氩水模均混时间 临界气量工业试验 ．II． 东北大学硕士学位论文 东北大学硕士学位论文 ABSTRACT Optimization Design of Ladle Argon Bubbling of Liquid Steel Abstract The argon bubbling process ofthe 43t steel ladle in Steel Plant No．1 ofJinan Iron and Steel Corporation is experimentally studied、析t11 a water model and the bubbling parameters are optimized．Industrial tests are also carded out to verify the results ofthe water modeling and further optimize the bubbling process．The main work consists of the following two parts： (1)Water model study Water model experiments were carded out to investigate the influences of the bubbling gas rates，the oil layer thickness，the oil viscosity,and the bubbling tuyere location the bath mixing time，the critical bubbling gas rate for opening ofthe metal surface，and the critical bubbling gas rate for the entrapment of slag．Quantitative relationships between mixing time and gas bubbling parameters，between critical bubbling gas rate for metal surface and gas bubbling parameters，and between critical bubbling gas rate for slag entrapment and gas bubbling parameters are obtained．The optimum combination of gas bubbling parameters is also obmined．The results show that,for the 43t steel ladle and my experiment conditon，the optimum location of argon bubbling tuyere is at 315mm from the center of the ladle boRom，where the stirring intensity may reac