不同装炉方式对铸坯加热的影响  

Effect of different charging methods on slab heating

作　　者：张开发 王明林[1] 张慧[1] 俞占扬 王东华 刘斌[1] ZHANG Kaifa;WANG Minglin;ZHANG Hui;YU Zhanyang;WANG Donghua;LIU Bin(National Engineering and Research Center for Continuous Casting Technology,Center Iron and Steel Research Institute,Beijing 100081,China;Zhongda National Engineering and Research Center of Continuous Casting Technology Co.,Ltd.,Beijing 100081,China)

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心,北京100081 [2]中达连铸技术国家工程研究中心有限责任公司,北京100081

出　　处：《炼钢》2021年第4期65-73,共9页Steelmaking

基　　金：“十三五”科技支撑计划资助项目(2017YFB0304000)。

摘　　要：为研究不同装炉方式下铸坯在炉加热过程中温度场和热量变化,并探讨热送热装工艺的节能优势,以某钢厂的热送热装生产线为依据,利用有限元法建立了冷装、温装和热装下铸坯在炉加热的二维传热模型,并结合现场测温验证了模型的准确性。结果表明,在加热过程中冷装与温装的铸坯都会形成角部最高、芯部最低的类椭圆型温度分布,而热装铸坯则存在低温区域逐渐由角部向芯部转移的过程,待芯部为低温区域时断面温度分布与前二者相似。3种不同装炉方式的铸坯都在加热一段吸热最多、均热段吸热最少,铸坯装炉温度越高加热一段对其加热过程影响的比重越大。热装铸坯装炉前所含热量是冷装铸坯的16.48倍,在炉吸热量仅为冷装铸坯的38.22%,为温装铸坯的52.30%,节能潜力巨大。In order to study the temperature field and heat change of slab in furnace heating process under different charging methods, and to explore the energy saving advantages of hot transport and hot charging rolling, a two-dimensional heat transfer model of slab in furnace heating under cold charging, warm charging and hot charging was established by using finite element method based on the hot delivery and hot charging production line of a steel plant, and the correctness of the model was verified by field temperature measurement. The results show that during the heating process, the temperature distribution of cold charging billets is similar to that of warm charging billets with the highest corner temperature and the lowest core temperature distribution, while the hot charging billets have a process of gradually transferring the low temperature region from the corner to the core. The higher the charging temperature is, the greater the proportion of influence on the heating process. The heat content of hot charging billets before charging is 16.48 times of that of cold charging billets. The heat absorbed by hot charging billets is only 38.22 % of that of cold charging billets and 52.30 % of that of warm charging billets.

关 键 词：热送热装 铸坯加热 数值模拟 有限元法 温度场 

分 类 号：TF777[冶金工程—钢铁冶金]