不同钢包底吹氩模式对钢液精炼效果的影响  

Effect of Different Argon Blowing Modes on Refining Effect of Molten Steel

作　　者：杨风国 王晓英 周明星 郑冰 徐东[2,4] Yang Fengguo;Wang Xiaoying;Zhou Mingxing;Zheng Bing;Xu Dong(Whole Processes of High Quality Fastener Application Technology Research Center of Universities in Hebei Prov-ince,Hebei Taihang Iron and Steel Group Co.,Ltd,Handan 056305,China;Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province,Hebei University of Engineering,Handan 056038,China;College of Materials and Metallurgy,Liaoning Science and Technology University,Anshan 114051,China;Engineering Research Center for High Toughness Wind Tower Steel of Hebei Province,Hebei University of Engineering,Handan 056035,China)

机构地区：[1]河北太行钢铁集团有限公司河北省高校高端紧固件全流程应用技术研发中心,邯郸056305 [2]河北工程大学河北省高品质冷镦钢技术创新中心,邯郸056038 [3]辽宁科技大学材料与冶金学院,鞍山114051 [4]河北工程大学河北省高韧性风塔钢工程研究中心,邯郸056305

出　　处：《特殊钢》2024年第1期54-60,共7页Special Steel

摘　　要：以180 t双孔底吹氩钢包为研究对象,对6种钢包底吹氩模式进行数值模拟,并结合现场试验与当前采用的吹氩模式进行对比。研究发现:(1)钢液的混匀时间随吹氩量的增加而减少,吹氩量一定时,差流量吹氩模式对钢液的搅拌强于等流量吹氩模式。(2)不同的钢包底吹氩模式,渣眼形成的位置不同,渣眼面积也不同。总流量一定时,差流量吹氩模式钢液面最大流速大于等流量吹氩模式,易发生钢液卷渣。(3)差流量吹氩模式渣线处渣层厚度的波动大于等流量吹氩模式,且流量差值越大,波动越剧烈。(4)差流量吹氩模式通过“强-弱”流股的配合,进一步强化了钢包底吹氩的钢液精炼效果。工业试验表明,采取等流量吹氩模式(500 L/min—500 L/min),钢中的较大夹杂物的数目明显多于差流量吹氩模式(400 L/min—600 L/min)。In this paper, one 180 t double-hole bottom argon blowing ladle is taken as the research object. Based on the specific production conditions, six modes of argon bottom blowing in ladle are numerically simulated, and combined with the field test, it is compared with the argon blowing mode currently adopted. The results show that:(1) The mixing time of molten steel decreases with the increase of argon blowing amount. When argon blowing amount is constant, the argon blowing mode with differential flow rate is stronger than that with constant flow rate.(2) Different modes of argon blowing at the bottom of ladle have different locations and areas of slag holes. When the total flow rate is constant, the maximum velocity of molten steel surface in the differential flow argon blowing mode is greater than that in the constant flow argon blowing mode, which is easy to cause slag entrapment.(3) The fluctuation of slag layer thickness at the slag line in differential flow argon blowing mode is greater than that in constant flow argon blowing mode, and the greater the flow difference, the more severe the fluctuation.(4) The differential flow argon blowing mode further strengthens the refining effect of molten steel by argon blowing at the bottom of ladle through the cooperation of "strong-weak" streams. And the industrial test shows that the number of larger inclusions in steel is obviously more than that in argon blowing mode(400 L/min—600 L/min) with constant flow rate(500 L/min—-500 L/min).

关 键 词：钢包吹氩 数值模拟 混匀时间 渣眼 

分 类 号：TF769[冶金工程—钢铁冶金]