Electroslag remelting (ESR) technology has been innovatively employed to recycle the rejected electrolytic manganese metal (EMM) scrap. For a better understanding of the refining process, a transient three-dimensional comprehensive numerical model was developed based on computational fluid dynamics (CFD). With the assistance of the magnetic potential vector, the Maxwell's equations were solved for representing the electromagnetic fields. The movement of the manganese droplets was described by the volume of fluid (VOF) approach. A reasonable agreement between the simulations and experimental data is obtained. With the continuous melting of the EMM scrap, manganese droplets are formed at the inlet of the simulation domain and fall down and through to the slag phase afterwards. The highly conductive manganese droplet significantly changes the distribution of the current streamline and the Lorentz force around it. The droplet tends to rotate and move along the horizontal direction. With the current ranges from 5000 A to 8000 A, the volume-average Joule hating density and the time-average melt rate increase from 1.97×10 7 W/m 3 to 5.25×10 7 W/m 3 and from 0.029 kg/s to 0.073 kg/s, respectively. The average equivalent diameter of the manganese droplet increases from about 3.02 mm to 3.77 mm. The average residence time however first decreases from 5.12 s to 4.86 s and then rise to 5.24 s. The more vigorous molten slag would increases the motion path as well as the motion time of the droplet in the slag layer.

Original languageEnglish
Title of host publicationProceedings of the 7th International Congress on Science and Technology of Steelmaking (ICS 2018)
Subtitle of host publicationThe Challenge of Industry 4.0
Place of PublicationMilan, Italy
PublisherAssociazione Italiana di Metallurgia
Number of pages10
ISBN (Electronic)978-889899014-6
Publication statusPublished - 2018
EventICS 2018: 7th International Congress on Science and Technology of Steelmaking - Venice, Italy
Duration: 13 Jun 201815 Jun 2018

Conference

ConferenceICS 2018: 7th International Congress on Science and Technology of Steelmaking
CountryItaly
CityVenice
Period13/06/1815/06/18

    Research areas

  • Electroslag remelting, Heat transfer, Magnetohydrodynamic, Numerical simulation

ID: 51941609