温度对连铸结晶器保护渣黏度和热流密度的影响  

Study on Viscosity and Heat Flux Density of Casting Mold Powder at Different Temperature

作　　者：韩秀丽[1,2] 刘磊[1] 张韩[1] 潘苗苗[1] 刘丽娜[1] 

机构地区：[1]河北联合大学矿业工程学院,河北唐山063009 [2]河北省矿业开发与安全技术实验室,河北唐山063009

出　　处：《钢铁钒钛》2014年第3期94-98,共5页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助项目(51174073;U1360106);河北省教育厅资助项目(QN20131013)

摘　　要：炼钢连铸过程中结晶器保护渣的黏度、热流密度会对铸坯质量产生较大影响,采用结晶器渣膜热流模拟和黏度测试仪,研究了唐钢二钢轧厂低、中碳钢连铸用保护渣在不同温度下的黏度和热流密度。结果表明,在1 200~1 400℃温度范围内,随着熔渣温度的升高,低、中碳钢保护渣黏度值均呈现急剧下降的趋势,在温度超过1 350℃后,黏度下降幅度趋于平缓;与黏度变化相比,热流密度随温度的升高却呈现增大的趋势,并且在温度升高到1 250℃时,增大的幅度就开始趋于平缓。The viscosity and heat flux density of mold fluxes have a great impact on the quality of slab via continuous casting. Different casting mold powders used for low and medium carbon steels had been studied in term of their viscosity and heat flux density of at diferent temperatures through heat flux simulation and viscosity meter. The results show that with increasing temperature in 1 200 ~ 1 400 ℃,the viscositiy of mold powders for low-carbon and medium-carbon steels casting dramatically decreased until 1 350 ℃,however,the heat flux density of mold fluxes increased and its increment slowed down after temperature reaching 1 250 ℃.

关 键 词：连铸 保护渣 黏度 热流密度 润滑 传热 

分 类 号：TF777[冶金工程—钢铁冶金]