精炼钢包缝隙式透气砖内钢液渗透行为

Penetration behavior of molten steel into slot plug used for refining ladles

研究分析了钢包缝隙式透气砖内钢液的渗透机理,并依据缝隙内渗透金属液的动量守恒及能量守恒,建立了描述缝隙内钢液渗透的数学模型,对钢液渗透的动力学行为进行了研究,理论计算结果与试验数据进行了对比。研究结果表明,透气砖缝隙内钢液渗透主要是由于黏附力达到极限导致的,渗透一旦发生,金属液会在较短时间内迅速渗入透气砖缝隙;受缝隙长度影响,钢液的渗透过程存在不稳定渗透阶段,之后渗透深度达到最大值,并不再发生变化,研究结果为底喷粉元件抗渗透性设计提供了依据。

The mechanism of molten steel penetrating into slot plug applied for refining ladle was analyzed,and a mathematical model describing the penetration behavior was established by considering the energy conservation and momentum conservation of the molten metal in the slot. Dynamic behaviors of molten steel penetrating into slot were researched,and the calculated results were compared with experimental data. It is found that the failure of additional pressure against static pressure is the major cause of penetration. Once the penetration occurs,molten metal would rapidly penetrate into the slot plug in short time. During this period,there exists an unsteady penetration stage as the slot length is much larger than the width. Then it reaches the maximum penetration depth. The investigation provides a basis for designing slot plug to prevent from penetration applied for bottom powder injection.