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保护渣中Al2O3质量分数变化是渣钢交互作用的结果,包括吸附钢液中Al2O3夹杂和渣金反应产物。氧化铝对保护渣成分与性能稳定性影响突出,进而影响铸坯质量。分析指出,影响保护渣吸附Al2O3夹杂的因素包括接触角、润湿速率和界面张力、熔渣成分和性能等。熔渣与夹杂物的交互作用行为决定了其对上浮夹杂的去除率。高铝钢连铸过程渣金反应尤为突出,保护渣的工作性能将发生明显改变。基于近年关于Al2O3夹杂的吸附溶解试验研究,以及高铝钢浇铸渣金反应及其保护渣性能变化的研究结果,探讨了通过合理设计保护渣成分或更换渣系等措施来实现该类钢种保护渣工作性能的相对稳定性。
The change of Al2O3 mass fraction in the mold powder is the result of slag-steel interaction, including the Al2O3 inclusions and the slag-gold reaction products in the molten steel. Alumina has a significant impact on the composition and performance of the mold powder, thereby affecting the quality of the slab. It is pointed out that the factors that affect the slag inclusion in Al2O3 inclusions include contact angle, wetting rate and interfacial tension, slag composition and properties. The interaction between slag and inclusions determines its removal rate of floating inclusions. High-aluminum steel slag casting slag reaction is particularly prominent, the performance of mold flux will change significantly. Based on the research on the adsorption and dissolution of Al2O3 inclusions in recent years and the research results on the slag reaction and the properties of the mold fluxes in the high aluminum steel casting, the protection of such steel products by means of rational design of the slag components or replacement of the slag system is discussed Relative stability of slag performance.