High-concentration Al deoxidation resulting in diversified aggregated patterns of alumina inclusions in high-Al iron melt were observed, especially, a new alumina agglomerate with a ring shape was reported and discussed in the current work. A large number of small alumina particle originated from the explosive nucleation of alumina in Fe-Al-O reaction zone with high-concentration Al in a short time is the critical condition for forming the alumina-agglomerated ring. To understand the stabilities of the ring, the relationships among the liquid capillary force, the equivalent inner radius of ring, the filling angle, and the separation distance h were quantitatively investigated based on a mathematical model and experimental results. The new phenomenon and formation mechanism of alumina-agglomerated ring could be important to high-Al steel metallurgy.

中文翻译：

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高铝铁熔体中氧化铝夹杂物的多样化聚集形态

观察到高浓度铝脱氧导致高铝铁熔体中氧化铝夹杂物的多种聚集模式，特别是在当前工作中报道和讨论了一种新的环状氧化铝团聚体。氧化铝在Fe-Al-O反应区与高浓度Al在短时间内爆炸形核而产生的大量小氧化铝颗粒是形成氧化铝团聚环的关键条件。为了了解环的稳定性，基于数学模型和实验结果，定量研究了液体毛细力、环的等效内半径、填充角和分离距离 h 之间的关系。氧化铝团聚环的新现象和形成机制对高铝钢冶金具有重要意义。