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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。
In the process of steelmaking and continuous casting, the mold flux density and heat flux have a great influence on the slab quality. By using the mold slag film heat flow simulation and the viscosity tester, the effects of low and medium carbon steel The viscosity and heat flux of mold powder for continuous casting at different temperatures. The results show that the viscosity of the low and medium carbon steel fluxes decreases sharply with the increase of the slag temperature at the temperature range of 1 200 ~ 1 400 ℃. After the temperature exceeds 1 350 ℃, the viscosity drop Tends to be gentle. Compared with the change of viscosity, the heat flux density tends to increase with the increase of temperature, and when the temperature is increased to 1 250 ℃, the increase of temperature tends to be gentle.