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Cold crucible melting with bottom pouring nozzle

Cold crucible melting with bottom pouring nozzle

Bojarevics, Valdis and Pericleous, Koulis ORCID: 0000-0002-7426-9999 (2019) Cold crucible melting with bottom pouring nozzle. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering. ISSN 0332-1649 (In Press) (doi:https://doi.org/10.1108/COMPEL-05-2019-0208)

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Abstract

Cold crucible melting technique with electromagnetic induction is used to obtain reactive metal castings and produce high quality metal powders for aerospace, automotive and medical applications. An important part of this technology is the nozzle used to pour the molten alloy through the bottom opening. The paper uses mathematical modelling technique, previously validated on multiple similar cases, to investigate a new type of non-consumable nozzle made of copper segments. The design of the nozzle requires to satisfy the narrow balance between the thin solidified protective layer on the wall while avoiding the blockage of the outflow if the nozzle is frozen completely. The sensitivity of the outflow to the nozzle diameter is investigated. The AC electromagnetic force leads to high mixing rates, transitional flow structures and turbulence of the melt, contributing to the melt shape dynamics and the heat loss to walls. The beneficial features of the cold crucible melting to purify the melt from particulate contamination are explained using the particle tracking for the full melting and pouring cycle.

Item Type: Article
Uncontrolled Keywords: induction heating, magnetic levitation, magnetohydrodynamics, time domain modelling
Subjects: Q Science > QD Chemistry
Faculty / Department / Research Group: Faculty of Liberal Arts & Sciences
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA)
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG)
Faculty of Liberal Arts & Sciences > Department of Mathematical Sciences
Last Modified: 31 Jan 2020 11:56
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/25969

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