摘要
电弧炉炼钢广泛采用集束射流供氧技术以强化熔池搅拌、加速冶金反应和提升产品质量.本文利用数学分析方法推导出射流冲击深度理论计算模型并进行了修正,利用数值模拟和水模型实验方法验证所推导计算模型的可靠性.实验结果表明:集束射流与普通超音速射流的冲击深度规律相似.同射流条件下,随着氧枪枪位的提升,冲击深度逐渐减小;同枪位条件下,集束射流冲击深度大于普通超音速射流冲击深度;集束射流的k值和射流轴线密度大于普通超音速射流,这表现为相同氧枪枪位条件下,集束射流的冲击深度更深.
Coherent jet is widely adopted in electric arc furnace ( EAF) steelmaking to promote molten-bath fluid flow,accelerate the metallurgical reaction,and improve the quality of molten steel. A water model experiment was conducted and a computational fluid dynamics ( CFD) model was established to validate the theoretical model of penetration depth,which was built and modified by mathematical analysis.Results show that the impact law of the coherent jet is similar to that of conventional supersonic jet. With the same jet condition,the penetration depth decreases as the lance height increases. At the same lance height,the penetration depth of the coherent jet is greater than that of the conventional supersonic jet as indicated by the higher k value and jet gas density of the former.
作者
刘福海
魏光升
朱荣
唐天平
常军
苏荣芳
刘润藻
LIU Fu-hai;WEI Guang-sheng;ZHU Rong;TANG Tian-ping;CHANG Jun;SU Rong-fang;LIU Run-zao(National Center for Materials Service Safety,University of Science and Technology Beijing,Beijing 100083,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Key Laboratory of Special Melting and Preparation of High-end Metal Materials,University of Science and Technology Beijing,Beijing 100083,China;Xining Special Steel CO. ,LTD. ,Xining 810000,China;Rongcheng Jingye TechnologyLimited Beijing,Beijing 100083,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2018年第S1期130-137,共8页
Chinese Journal of Engineering
基金
国家自然科学基金资助项目(51734003
51474024
51574021)
关键词
电弧炉炼钢
集束射流
冲击深度
数值模拟
水模型实验
EAF steelmaking
coherent jet
penetration depth
numerical simulation
water model experiment
