综述：中间包钢液二次氧化对钢中非金属夹杂物的影响

段生朝, 刘珍童, 康君, 白乘风, 文健, 刘刚, 张立峰

Review: Effect of Reoxidation on the Non-Metallic Inclusion in Molten Steels in Tundish

DUAN Shengchao, LIU Zhentong, KANG Jun, BAI Chengfeng, WEN Jian, LIU Gang, ZHANG Lifeng

表2 中间包耐火材料导致钢液二次氧化的研究总结^{[24,32,49,51~55]}

Table 2 Summaries of reoxidation of molten steel caused by refractory material of tundish^{[24,32,49,51-55]}

Tundish refractory	Steel composition (mass fraction / %)	Main conclusion	Ref.
Al₂O₃-SiO₂	Ni-Fe alloy	The substitute of mullite to SiO₂ mullite of the refractory bonding matrix or the use of alumina bricks can avoid the reoxidation of the melt and intense inclusion formation	[52]
GM, MgO boards, and dry powder	0.45C-3.1Si-0.4Mn-8.5Cr-0.25Ni	An oxidized steel layer can be formed at the steel/refractory lining interface	[53]
MgO, Al₂O₃, MgO + 2MgO·SiO₂ GMs	Ti-stabilized ultra-low carbon steel	The large difference in oxygen potential between refractory and steel phase leads to the formation of (Mg, Fe)O layer ( $P_{O_{2}}$ = 10^-11 Pa); The thicker layer was formed using MgO-based GM compared with Al₂O₃-based GM	[49]
MgO- and Al₂O₃-based GMs	Ti-stabilized ultra-low carbon steel	The oxidation capacity of MgO GM with 10SiO₂-6FeO was higher than that of Al₂O₃ GM with 3.3SiO₂ + 2FeO	[24]
MgO-CaO and MgO-based GMs	Si-Mn-killed SAE 1055 steel	The GM with the reducible oxides SiO₂ and FeO was responsible for providing oxygen and causing reoxidation of the molten steel	[32]
MgO- and Al₂O₃-based GMs	Ti-stabilized ultra-low carbon steel	The MgO GM represented a stronger oxidizing capacity, while Al₂O₃ can improve the cleanliness of the molten steel	[51]
High-silica tundish refractory (66MgO-27SiO₂-4FeO-3CaO)	Fe-2Al alloy	The content of the oxidizing oxides in the refractory should be reduced to avoid the loss of Al in the alloy	[54,55]