“…[4][5][6][7][8][9] Moreover, there is a concept, inclusion engineering, that deals with the control of the amount, morphology, size distribution, and composition of nonmetallic inclusions formed in the liquid steel during refining and solidification. [10] To better understand the mechanism of inclusion agglomeration behavior, the experimental studies using both in-situ [11][12][13][14][15] and ex-situ [16][17][18][19] methodologies have been performed. However, the current in-situ characterization research by high-temperature confocal laser scanning microscope (HT-CLSM) limits the inclusion behavior on the liquid steel surface or named steel-gas interface, which is a much different mechanism with the case of inclusion agglomeration at the bulk of the liquid steel.…”