#continuouscasting #steel #SEN #clogging
Is there any literature available on this topic?
Hello, main is factor steel cleanless. Poor steel quality and inclussion amount can lead to the formation of deposits in the SEN, which can cause clogging. These inclusions (Al2O3 or TiO2) can be formed during steelmaking or can enter the steel during casting. Inclusions can block the nozzle and reduce the flow of steel.The chemical composition of the steel can also play a role in SEN clogging. For example, high aluminum content in the steel can lead to the formation of aluminum oxide in the SEN, which can cause clogging. It is important that the calcium treatment is done correctly.
Hello!
There are several reasons for the clogging of SEN.
The most important of them is the deposition on SEN walls of corundum graphite of the products of deoxidation of steel with aluminum. At the same time, aluminates are also present in the body of SEN, which undoubtedly contributes to their interaction with each other.
Other important manifestations include:
- deposition of metal drops on the inner surface of SEN due to the disruption of the connection between the SEN and the dispenser nozzle and the development of the splashing effect;
– inconsistency of the design of SEN with pouring modes or the use of low-quality SEN;
- a low level of personnel qualification, when due to a drop in the metal pouring level in the tundish, the coating slag is captured and SEN can clogging over almost instantly.
Barati, H.; Wu, M.; Kharicha, A.; Ludwig, A. A Transient Model for Nozzle Clogging. Powder Technology 2018, 329, 181–198, doi:10.1016/j.powtec.2018.01.053.
Barati, H.; Wu, M.; Kharicha, A.; Ludwig, A. Discussion on Possible Solidification during SEN Clogging in Steel Continuous Casting. In Proceedings of the Solidification and Gravity VII (Eds: G. K. A. Roósz, Zs. Veres, M. Svéda); Hungarian Academy of Sciences: Miskolc-Lillafüred, 2018; pp. 144–149.
Barati, H.; Wu, M.; Kharicha, A.; Ludwig, A. Calculation Accuracy and Efficiency of a Transient Model for Submerged Entry Nozzle Clogging. Metall. Mater. Trans. B 2019, 50, 1428–1443, doi:10.1007/s11663-019-01551-x.
Barati, H.; Wu, M.; Kharicha, A.; Ludwig, A. Role of Solidification in Submerged Entry Nozzle Clogging During Continuous Casting of Steel. Steel Res. Int. 2020, 91, 2000230, doi:10.1002/srin.202000230.
Barati, H.; Wu, M.; Michelic, S.; Ilie, S.; Kharicha, A.; Ludwig, A.; Kang, Y.-B. Mathematical Modeling of the Early Stage of Clogging of the SEN During Continuous Casting of Ti-ULC Steel. Metall Mater Trans B 2021, 52, 4167–4178, doi:10.1007/s11663-021-02336-x.
Vakhrushev, A.; Kharicha, A.; Wu, M.; Ludwig, A.; Tang, Y.; Hackl, G.; Nitzl, G.; Watzinger, J.; Bohacek, J. On Modelling Parasitic Solidification Due to Heat Loss at Submerged Entry Nozzle Region of Continuous Casting Mold. Metals 2021, 11, 1375, doi:10.3390/met11091375.
Barati, H.; Wu, M.; Kharicha, A.; Ludiwg, A. Transient Simulation of Melt Flow, Clogging, and Clog Fragmentation inside SEN during Steel Continuous Casting. IOP Conf. Ser.: Mater. Sci. Eng. 2023, 1281, 012025, doi:10.1088/1757-899X/1281/1/012025.
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