MgO·Al₂O₃ spinel inclusions are generally found in steel, and required be controlled during steelmaking process due to the influences on continuous casting and the quality of final products. The present review aims to give an overall picture on the formation, evolution and removal of spinel inclusions. In this review, the reported formation mechanisms are reclassified, and the effects of Ca, Ti and Mn as well as rare earth on the evolution of spinel inclusions are summarized. Different methods with thermodynamic data sheets are also introduced for the calculation of phase stability diagram. To explain the evolution route of inclusions in industry, the sources and the formation kinetics of dissolved Mg and Ca are discussed. In addition, the agglomeration, separation and dissolution behaviors of spinel inclusions are considered, and the advantages of spinel inclusions are also addressed. Based on literature survey, some suggestions on the control of inclusions are given as well.

MgO·Al ₂ O ₃尖晶石夹杂物通常存在于钢中，由于对连铸和最终产品质量的影响，在炼钢过程中需要对其进行控制。本综述旨在对尖晶石夹杂物的形成，演化和去除进行全面介绍。在这篇综述中，对报道的形成机理进行了重新分类，并总结了钙，钛，锰以及稀土对尖晶石夹杂物的演化的影响。还介绍了具有热力学数据表的不同方法，用于计算相稳定性图。为了解释工业中夹杂物的演化途径，讨论了溶解态Mg和Ca的来源和形成动力学。此外，还考虑了尖晶石夹杂物的团聚，分离和溶解行为，尖晶石夹杂物的优点也得到了解决。在文献调查的基础上，对夹杂物的控制提出了一些建议。