PHYSICAL MODELLING OF MELT DEGASSING IN THE REFINING LADLE

1 WALEK Josef
Co-authors:
1 MICHALEK Karel 1 SVIŽELOVÁ Jana 1 ČARVAŠ Jiří
Institution:
1 VSB – Technical University of Ostrava, Ostrava, Czech Republic, EU, josef.walek@vsb.cz
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
1754-1760
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
33 views / 16 downloads
Abstract

The paper describes the use of physical modelling to study the degassing of aluminum melts in the refining ladle by inert gas blowing. The technology of blowing inert gas into the ladle through a rotating impeller is the most common method in operating conditions to reduce the unwanted phases content in molten aluminum, e.g. hydrogen. The high efficiency of this process is related to the creation of fine bubbles with a high interphase surface, their equal distribution into the whole volume of the refining ladle and with relatively long period of its effect in the melt. The presented paper is focused on the evaluation of laboratory experiments obtained using the physical modelling method; special attention is focused on the assessment of relevant parameters for the degassing process – flow rate of inert gas, rotary impeller speeds and impeller variant.

Keywords: Physical modelling, refining ladle, inert gas blowing, degassing of the melt, impeller
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