摘要
针对国内某钢厂1450 mm×230 mm板坯连铸结晶器生产情况,利用相似原理,建立相似比为0.6的物理模型。采用墨水进行流场显示试验,观察钢液从水口进入结晶器的扩散过程,通过数据采集系统对结晶器液面波动情况进行检测,对所采集液面波动数据采用1/10大波波高进行分析,研究不同断面及拉速对结晶器液面波动的影响,并对不同断面结晶器下所对应的拉速做出优化。结果表明,结晶器两侧的流场轨迹基本对称分布;结晶器宽度和拉速的增加均会导致结晶器液面波动幅度增大,随着结晶器宽度的增加,窄面附近的液面波动波幅增加最小,结晶器水口附近液面波动波幅增加最大;当结晶器拉速增大时,液面波动的剧烈程度基本符合窄面附近处最大、SEN附近处次之、1/4宽面处最小的规律,但在结晶器宽度1150 mm、拉速1.6 m/min条件下,水口处波动大于窄面附近。在结晶器宽度为1150 mm、拉速为1.6 m/min,结晶器宽度为1450 mm、拉速为1.4 m/min和结晶器宽度1750 mm、拉速为1.2 m/min工况下结晶器液面波动比较合理。
Aiming at the production of 1450 mm×230 mm slab continuous casting crystallizer in a domestic steel mill,a physical model with a similarity ratio of 0.6 was established by using the similarity principle.The flow field display test was carried out by using ink,the diffusion process of molten steel entering the mold from the nozzle was observed,the liquid level fluctuation of the mold was detected by the data acquisition system,and the collected liquid level fluctuation data was analyzed by 1/10 large wave height,and the influence of different sections and drawing speed on the liquid level fluctuation of the mold was studied,and the corresponding pulling speed under the mold of different sections was optimized.The results show that the flow field trajectories on both sides of the mold are basically symmetrically distributed,and the increase of the width and pulling speed of the mold will lead to the increase of the mold level variation of the crystallizer,with the increase of the width of the crystallizer,the mold level variation amplitude near the narrow surface increases the smallest,and the mold level variation amplitude near the mouth of the crystallizer increases the most.Under the condition of 1.6 m/min,the fluctuation at the nozzle is greater than that near the narrow surface.The mold level variation of the mold is reasonable under the conditions of 1150 mm and 1.6 m/min,1450 mm and 1.4 m/min and 1750 mm and 1.2 m/min.
作者
高煜
单庆林
王振东
潘宏伟
张军国
路博勋
Gao Yu;Shan Qingin;Wang Zhendong;Pan Hongwei;Zhang Guojun;Lu Boxun(Collaborative Innovation Center for Iron and Steel Generic Technologies,University of Science and Technology Beijing,Beijing 100083;Technical Center of Tangshan Iron&Steel Group Co.,Ltd.,Tangshan 063000,Hebei;Hebei High Quality Steel Continuous Casting Technology Research Center,Tangshan 063000,Hebei;Hot Rolling Division,Tangshan Iron&Steel Group Co.,Ltd.,Tangshan 063000,Hebei)
出处
《河北冶金》
2023年第12期33-39,共7页
Hebei Metallurgy
关键词
结晶器
水模型
断面
拉速
液面波动
mold
water model
cross-section
drawing speed
level variation
