连铸中间包耐火材料的冲蚀特性与控流装置的优化设置

中间包内耐火材料的损毁是化学反应、热应力与钢液流动的协同作用所致,中间包内控流装置发生侵蚀的主要原因是钢液对耐火材料的冲蚀。对设置有湍流控制器、挡渣堰、挡渣坝的中间包耐火材料的冲蚀特性进行数值模拟计算与分析,结果表明,中间包内冲蚀最严重的部位是在湍流控制器及冲击区包壁上部1/3处,其次是挡渣堰迎向钢液流动一侧壁面;随着挡渣堰与钢液入口距离的增加,钢液对挡渣堰、挡渣坝的冲蚀强度下降;根据停留时间分布（RTD）曲线设置中间包控流装置时,应考虑钢液对耐火材料的冲蚀特性。

Flow control devices establishment and erosion corrosion of refractory in the continuous casting tundish

The combined effect of chemical reactions,thermomechanical stress and molten steel flow erosion contribute to the damage of the tundish refractory.The molten steel flow erosion mainly accounts for the damage of flow controls.In this regard,the erosion corrosion in a two strand continuous casting tundish equipped with turbulence inhibitor,dams and weirs were numerically simulated by commercial software computer fluid dynamics（CFD）.The results show the maximum erosion strength position was mainly found in the turbulence inhibitor and the working lings near slag line around the injection zone,and then in the weir walls faced to the flow direction.With the distance from the weir to the entrance increases,the erosion corrosion strength decreases.So,the erosion corrosion to refractories should be considered in optimization design of flow control devices based on the analysis of RTD curves.