Masters Theses

Keywords and Phrases

continuous casting; electromotive force; light-weight steel; mold flux; slag dopants


"Mold flux plays one of the critical roles in continuous casting of steel. It performs five primary functions: thermal and chemical insulation, lubrication between the steel strand and mold, absorption of inclusions, and promotion of even heat flux. The aluminum/silica exchange reaction occurring between steel and mold flux during the continuous casting process poses significant challenges in the steel industry. This reaction can lead to various defects in the cast product and adversely affect its surface quality, as well as downstream processing.

In this work, effectiveness of two approaches, namely slag dopant additions and electrochemical techniques, in suppressing the exchange reaction between high aluminum steel and mold flux were investigated. Various slag dopants, including CaSO4, SrSO4, and SeS2, were tested at concentrations of 0.5 wt.%, 1.0 wt.%, and 2.5 wt.%. The results demonstrated that all dopants tested slowed down the exchange reaction compared to the baseline condition. Among them, SrSO4 and SeS2 at a concentration of 0.5 wt.% exhibited slightly better suppression. However, increasing the dopant concentration above 1.0 wt.% did not further influence the reaction.

Moreover, the application of electrical potentials showed promising results in inhibiting the exchange reaction. Specifically, a voltage of 0.84 V and 1.0 V applied by steel electrode effectively suppressed the reaction, leading to increased aluminum content and decreased silicon content in the steel compared to the baseline condition"--Abstract, p. iii


Gu, Yijia
O'Malley, Ronald J.

Committee Member(s)

Smith, Jeffrey D.
Emdadi, Arezoo


Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering


Missouri University of Science and Technology

Publication Date

Summer 2023


x, 63 pages

Note about bibliography

Includes bibliographical references (pages 60-62)


© 2023 Kuanysh Nurbekuly Yermukhanbetov, All Rights Reserved

Document Type

Thesis - Open Access

File Type




Thesis Number

T 12306

Electronic OCLC #


Included in

Metallurgy Commons