摘要
模拟研究了1873 K钢液温度下钢皮厚度0. 74 mm的CaAl包芯线的熔化、气化行为及150 t钢包的理想喂线参数,并试验研究了不同钢种及钙合金包芯线对钙收得率的影响.结果表明:包芯线喂入钢液后,包芯线的CaAl合金先于包敷的钢皮熔化,自喂入钢液0. 92 s后,包芯线顶端钢皮熔化,液态CaAl合金进入钢液后扩散溶解,当钙液滴上浮到钢液面以下1. 22 m深度时,达到了气化的饱和蒸汽压,才会气化.在150 t钢包条件下,为了减少钙的气化烧损,采用3. 22～4. 83 m·s-1的喂线速度,实现包芯线在钢液深度2. 96 m处熔化的目标.为了提高钙的收得率,应采用纯钙包芯线处理碳、硅、锰等元素含量较高的钢种,选择CaAl包芯线处理低硅低锰的低碳钢种.
Melting and gasification behavior of CaAl cored wire with 0. 74-mm steel sheet and better feeding process in 1873 K molten steel in 150 t ladle was simulated,and the influence of different Ca cored wire and composition of liquid steel on Ca recovery were analyzed. The results show that calcium alloy of CaAl cored wire has smelted before its covering steel sheet melts when cored wire is fed into molten steel,melting time of CaAl cored wire is 0. 92 s,then liquid Ca alloy diffuses into liquid steel. Liquid Ca alloy floats upward to 1. 22m below the liquid steel surface and gasifies when alloy has get enough steam pressure of gasification. The feeding speed of 3. 22-4. 83 m·s - 1 for CaAl cored wire is appropriate to get ideal feeding depth of 2. 96 m in ladle with liquid steel. When the elements contents of carbon,silicon and manganese in liquid steel are high,pure Ca cored wire should be used to get bigger Ca recovery, on the contrary,CaAl cored wire is a better option for low carbon liquid steel with low elements contents of silicon and manganese.
作者
郑万
李天佑
王春锋
熊珊
李光强
刘炳宇
ZHENG Wan;LI Tian-you;WANG Chun-feng;XIONG Shan;LI Guang-qiang;LIU Bing-yu(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Key Laboratory for New Process of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan 430081,China;Wuhan Iron and Steel Co. Ltd. ,BaowuGroup,Wuhan 430083,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2018年第S1期168-173,共6页
Chinese Journal of Engineering
基金
武汉科技大学科技创新团队培育资助项目(2018TDX08)
关键词
CaAl包芯线
钙处理
熔化特性
喂线参数
CaAl cored wire
calcium treatment
melting characteristics
wire-feeding parameters
作者简介
通信作者:郑万,E-mail:zhengwan@wust.edu.cn.
