Inclusions and Nozzle Clogging during Billet Continuous Casting Process

Abstract

This study is to investigate causes and process of the nozzle clogging during billet continuous casting process. Clogging materials are analyzed using optical microscope, SEM and EDS Inclusions in steel samples are also investigated. the big Al2O3-MgO spinel inclusions in the billet are verified to stem from the dislodgement of the clogging materials. a simple kinetic clogging model is developed to predict the entrapment probability of inclusions to the nozzle lining wall and the number of heats that can be poured before the nozzle is entirely clogged. Factors affecting SEN clogging such as casting speed and nozzle diameter are discussed. the 3-dimensional fluid flow and inclusion motion in the tundish, SEN and the mold are simulated in order to predict the inclusion removal during casting and better describe the clogging process Finally thermodynamic calculation for the control of MgO-Al2O3 spinel inclusions is performed the modification of MgO-Al2O3 spinel inclusions using calcium, calcium-silicon, and boron is thermodynamically discussed.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Clogging; Continuous casting; Fluid flow; Inclusion

International Standard Book Number (ISBN)

978-161567636-1

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Curran Associates, Inc., All rights reserved.

Publication Date

01 Dec 2009

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