Abstract
Presence of non-metallic inclusions (NMIs) reduces surface quality and mechanical properties of aluminum products. The development of good NMIs removal practices relies on the understanding of inclusion behaviors with respect to separation and agglomeration particularly in the turbulent flow. In the scenario of electromagnetically induced recirculated turbulent flow, the concerned behaviors of inclusions with different sizes have rarely been investigated experimentally. In the presented study funded by AMAP Open Innovation Research Cluster, reference materials were prepared with uniformly distributed NMIs (SiC and MgAl2O4) via an ultrasound-involved casting route. Reference materials were charged into an aluminum melt where turbulent flow was promoted via electromagnetic force. Microscopical analysis shows non-significant agglomeration tendency of SiC, MgAl2O4, and TiB2 inclusion. Time-weight filtration curve, PoDFA, and Spark Spectrometer results suggest a strong dependence of separation rate on particle size. Analytical models were established to estimate the collision rate of particles and to evaluate separation probability of different sized particles.
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References
Li C, Li J, Mao Y, Ji J (2017) Mechanism to Remove Oxide Inclusions from Molten Aluminum by Solid Fluxes Refining Method. China Foundry 14(4):233–243
Grandfield J (2017) Developments in Inclusion Removal Technology. Light Metals 2017:1429–1434
Szekely AG. The Removal of Solid Particles from Molten Aluminum in the Spinning Nozzle Inert Flotation Process. Metall Mater Trans B 7(2):259–270
Tian C, Irons GA, Wilkinson DS (1998) Monte Carlo Simulation of Clustering of Alumina Particles in Turbulent Liquid Aluminum. Metall Mater Trans B 29(4):785–791
Johansen ST, Taniguchi S (1998) Prediction of Agglomeration and Break-Up of Inclusions during Metal Refining. Light Metals 1998:855–861
Marechal L, EI-Kaddah N, Menet P-Y (1993) Influence of Convection on Agglomeration and Removal of Non-Metallic Inclusions in Molten Aluminum. Light Metals 1993:907–913
Zhang L, Wang S, Dong A, Gao J, Damoah L. N. W. (2014) Application of Electromagnetic (EM) Separation Technology to Metal Refining Processes: A Review. Metall Mater Trans B 45(6):2153–2185
Leenov D, Kolin A (1954) Theory of Electromagnetophoresis. I. Magnetohydrodynamic Forces Experienced by Spherical and Symmetrically Oriented Cylindrical Particles. J Chem Phys 22(4):683–688
Takahashi K and Taniguchi S (2003) Electromagnetic Separation of Nonmetallic Inclusion from Liquid Metal by Imposition of High Frequency Magnetic Field. ISIJ Int 43(6):820–827
Ščepanskis M, Jakovičs A, Baake E, Nacke B (2014) Solid Inclusions in an Electromagnetically Induced Recirculated Turbulent Flow: Simulation and Experiment. Int J Multiph Flow 64:19–27
Shu D, Sun B, Li K, Li T, Xu Z, Zhou Y (2002) Continuous Separation of Non-Metallic Inclusions from Aluminum Melt Using Alternating Magnetic Field. Mater Lett 55(5):322–326
Kennedy MW, Bakken JA and Aune RE (2015) Impact of Coil Geometry on Magnetohydrodynamic Flow in Liquid Aluminium and Its Relevance to Inclusion Separation by Electromagnetophoresis. J Manuf Sci Prod 15(1):69–78
Taberlet E and Fautrelle Y (1985) Turbulent Stirring in an Experimental Induction Furnace. J Fluid Mech 159:409–431
Kirpo M (2008) Modeling of Turbulence Properties and Particle Transport in Recirculated Flows. Ph.D. thesis, UNIVERSITY OF LATVIA
Saffman PG, Turner JS (1956) On the Collision of Drops in Turbulent Clouds. J Fluid Mech 1(1):16–30
Gökelma M, Einarsrud KE, Tranell G, Friedrich B (2020) Shape Factor Effect on Inclusion Sedimentation in Aluminum Melts. Metall Mater Trans B 51(2):850–860
Guha A (2008) Transport and Deposition of Particles in Turbulent and Laminar Flow. Annu Rev Fluid Mech 40:311–341
Acknowledgements
The research leading to these results was carried out in “Project 4 Continuation (P4C)” within Advanced Metals and Process (AMAP) Research Cluster at RWTH Aachen University, Germany. The authors are thankful for the financial support received from P4C members namely: Constellium, Magma, Nemak, Novelis, Speira, Trimet, and Vesuvius. Special thanks addressed to China Scholarship Council (CSC) for the financial support of Cong Li.
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Li, C., Dang, T., Gökelma, M., Zimmermann, S., Mitterecker, J., Friedrich, B. (2023). Assessment of Separation and Agglomeration Tendency of Non-metallic Inclusions in an Electromagnetically Stirred Aluminum Melt. In: Broek, S. (eds) Light Metals 2023. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22532-1_120
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DOI: https://doi.org/10.1007/978-3-031-22532-1_120
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