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STUDY OF ALUMINUM MELT REFINING PROCESS EFFICIENCY DEPENDING ON IMPELLER WEAR

1 SOCHA Ladislav
Co-authors:
1 GRYC Karel 1 SVIŽELOVÁ Jana 2 PRÁŠIL Tomáš 2 POSPÍŠIL Roman 2 GRÁF Martin
Institutions:
1 Institute of Technology and Business in České Budějovice, České Budějovice, Czech Republic, EU, socha@mail.vstecb.cz, gryc@mail.vstecb.cz, svizelova@mail.vstecb.cz
2 MOTOR JIKOV Slévárna (Foundry) a.s., Die-casting Division, České Budějovice, Czech Republic, EU, TPrasil@mjgroup.cz, RPospisil@mjsl.cz, MGraf@mjsl.cz
Conference:
30th Anniversary International Conference on Metallurgy and Materials, Brno, Czech Republic, EU, May 26 - 28, 2021
Proceedings:
Proceedings 30th Anniversary International Conference on Metallurgy and Materials
Pages:
1173-1178
ISBN:
978-80-87294-99-4
ISSN:
2694-9296
DOI:
https://doi.org/10.37904/metal.2021.4256
Published:
15th September 2021
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
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Abstract

The Foundry Degassing Unit for aluminum melt refining uses graphite components which, due to the action of the melt, degrade and lose their original shape. The shape of the impeller can have a significant effect on the efficiency of refining. This paper presents the study of the aluminum melt refining process efficiency depending on the degree of impeller wear. Operational experiments were performed to map degassing efficiency in defined phases of the impeller life. The efficiency was assessed by the Dichte Index which represents the degree of degasification of the melt after refining. It turned out that the new impeller released moisture into the melt, resulting in reduced impeller efficiency. The impeller achieved more than 90% efficiency in the following stages of its life.

Keywords: Aluminum, aluminum refinement, FDU, impeller wear, Dichte Index

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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