Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 1
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

The article describes the influence of optimization parameters on the efficiency of aluminium melt refining by using physical modelling. The blowing of refining gas, through a rotating impeller into the ladle is a widely used operating technology to reduce the content of impurities in molten aluminium, e.g. hydrogen. The efficiency of this refining process depends on the creation of fine bubbles with a high interphase surface, wide-spread distribution, the residence time of its effect in the melt, and mostly on the wide-spread dispersion of bubbles in the whole volume of the refining ladle and with the long period of their effect in the melt. For physical modelling, a plexiglass model on a scale of 1:1 is used for the operating ladle. Part of the physical model is a hollow shaft used for gas supply equipped with an impeller and also two baffles. The basis of physical modelling consists in the targeted utilization of the similarities of the processes that take place within the actual device and its model. The degassing process of aluminium melt by blowing inert gas is simulated in physical modelling by a decrease of dissolved oxygen in the model liquid (water).
Go to article

Bibliography

[1] Michalek, K., Tkadlečková, M., Socha, L., Gryc, K., Saternus, M., Pieprzyca, J. & Merder, T. (2018). Physical modelling of degassing process by blowing of inert gas. Archives of Metallurgy and Materials. 63(2), 987-992. DOI: 10.24425/122432.
[2] Hernández-Hernández, M., Camacho-Martínez, J., González-Rivera, C. & Ramírez-Argáez, M.A. (2016). Impeller design assisted by physical modelling and pilot plant trials. Journal of Materials Processing Technology. 236, 1-8. DOI: 10.1016/j.jmatprotec.2016.04.031.
[3] Mostafei, M., Ghodabi, M., Eisaabadi, G.B., Uludag, M. & Tiryakioglu, M. (2016). Evaluation of the effects rotary degassing process variables on the quality of A357 aluminium alloy castings. Metallurgical and Materials Transactions B. 47(6), 3469-3475. DOI: 10.1017/s11663-016-0786-7.
[4] Merder, T., Saternus, M. & Warzecha, P. (2014). Possibilities of 3D Model application in the process of aluminium refining in the unit with rotary impeller. Archives of Metallurgy and Materials. 59(2), 789-794. DOI: 10.2478/amm-2014-0134.
[5] Saternus, M., Merder, T. & Pieprzyca, J. (2015). The influence of impeller geometry on the gas bubbles dispersion in URO-200 reactor – RTD curves. Archives of Metallurgy and Materials. 60(4), 2887-2893. DOI: 10.1515/amm-2015-0461.
[6] Yamamoto, T., Suzuki, A., Komarov, S.V. & Ishiwata, Y. (2018). Investigation of impeller design and flow structures in mechanical stirring of molten aluminium. Journal of Materials Processing Technology. 261, 164-172. DOI: 10.1016/j.jmatprotec.2018.06.012.
[7] Gao, G., Wang, M., Shi, D. & Kang, Y. (2019). Simulation of bubble behavior in a water physical model of an aluminium degassing ladle unit employing compound technique of rotary blowing and ultrasonic. Metallurgical and Materials Transactions B. 50(4), 1997-2005. DOI: 10.1017/j.s11663-019-01607-y. [8] Yu, S., Zou, Z.-S., Shao, L. & Louhenkilpi, S. (2017). A theoretical scaling equation for designing physical modelling of gas-liquid flow in metallurgical ladles. Steel Research International. 88(1), 1600156. DOI: 10.1002/srin.201600156.
[9] Abreu-López, D., Dutta, A., Camacho-Martínez, J.L., Trápaga-Martínez, G. & Ramírez-Argáez, M. A. (2018). Mass transfer study of a batch aluminium degassing ladle with multiple designs of rotating impellers. JOM. 70, 2958-2967. DOI: 10.1007/s11837-018-3147-y.
[10] Walek, J., Michalek, K., Tkadlečková, M. & Saternus, M. (2021). Modelling of technological parameters of aluminium melt refining in the ladle by blowing of inert gas through the rotating impeller. Metals. 11(2), 284. DOI: 10.3390/met11020284.
[11] Saternus, M. & Merder, T. (2018). Physical modelling of aluminium refining process conducted in batch reactor with rotary impeller. Metals. 8(9), 726. DOI: 10.3390/met8090726.
[12] Lichý, P., Bajerová, M., Kroupová, I. & Obzina, T. (2020). Refining aluminium-alloy melts with graphite rotors. Materiali in Technologije. 54(2), 263-265. DOI: 10.17222/mit.2019.147.
[13] Lichý, P., Kroupová, I., Radkovský, F. & Nguyenová, I. (2016). Possibilities of the controlled gasification of aluminium alloys for eliminating the casting defects. 25th Anniversary International Conference on Metallurgy and Materials, May 25th - 27th 2016 (1474-1479). Hotel Voroněž I, Brno, Czech Republic, EU: Lichý, P.

Go to article

Authors and Affiliations

J. Walek
1
ORCID: ORCID
K. Michalek
1
ORCID: ORCID
M. Tkadlečková
1
ORCID: ORCID

  1. VŠB - Technical University of Ostrava, Faculty of Materials Science and Technology, Department of Metallurgical Technologies

This page uses 'cookies'. Learn more