Numerical Simulation on the Brake Effect of FAC-EMBr and EMBrRuler in the Continuous Casting Mold
| Autor: | Yanming Bao, Danzhu Ma, Zhuang Li, Lintao Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nozzle 0211 other engineering and technologies Bioengineering 02 engineering and technology lcsh:Chemical technology 01 natural sciences lcsh:Chemistry electromagnetic brake 0103 physical sciences Brake Chemical Engineering (miscellaneous) lcsh:TP1-1185 021102 mining & metallurgy 010302 applied physics Process Chemistry and Technology mold continuous casting Mechanics Electromagnetic brake Electromagnetic induction Magnetic field Continuous casting lcsh:QD1-999 Casting (metalworking) Meniscus |
| Zdroj: | Processes Volume 8 Issue 12 Processes, Vol 8, Iss 1620, p 1620 (2020) |
| ISSN: | 2227-9717 |
| DOI: | 10.3390/pr8121620 |
| Popis: | The brake effect of the freestanding adjustable combination electromagnetic brake (FAC-EMBr) and EMBr ruler on the behavior of molten steel flow and the level fluctuation were investigated with the numerical method. The effects of the horizontal magnetic pole position (EMBr ruler), magnetic induction intensity, and casting speed on two types of electromagnetic brakes were studied. The numerical simulation results show that the magnetic field caused by the EMBr ruler is mainly distributed under the submerged entry nozzle (SEN), and it is very weak nearby the meniscus area. After the FAC-EMBr is applied, the magnetic field is mainly distributed in the area below the submerged entry nozzle, the upper roll region, and in the meniscus region. The application of the electromagnetic brake can effectively suppress the impact of the jet and decrease the molten steel velocity in the meniscus area. The brake effect of the EMBr ruler on the behavior of the molten steel flow and the level fluctuation is significantly influenced by the horizontal magnetic pole position. The increasing of the magnetic flux density can significantly increase the velocity of molten steel in the upper roll region and lead to an intense fluctuation in the steel/slag interface, as the horizontal magnetic field cannot cover the three key regions. The brake effect of the FAC-EMBr is less influenced by the variation of the process parameters due to the addition of vertical magnetic poles. Additionally, the &ldquo secondary braking effect&rdquo of the vertical magnetic poles can help to lower the increase of velocity in the upper roll region caused by the excessive magnetic induction intensity and the high casting speed. Therefore, even under the high casting speed conditions, the application of a new type of FAC-EMBr is also an efficient way to suppress the molten steel flow and level fluctuation at the meniscus area and decrease the possibility of slag entrapment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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