Masters Theses
Keywords and Phrases
Graphite; Magnesia; Mechanism; Pickup; Refractory; Steel
Abstract
"Ultra-low carbon steels are utilized in processes which require maximum ductility. Increases in interstitial carbon lower the ductility of steel; therefore, it is important to examine possible sources of carbon. The refractory ladle lining is one such source. Ladle refractories often contain graphite for its desirable thermal shock and slag corrosion resistance. This graphite is a possible source of carbon increase in ultra-low carbon steels. The goal of this research is to understand and evaluate the mechanisms by which carbon transfers to ultra-low carbon steel from magnesia-graphite ladle refractory.
Laboratory dip tests were performed in a vacuum induction furnace under an argon atmosphere to investigate these mechanisms. Commercial ladle refractories with carbon contents between 4-12 wt% were used to investigate the effect of refractory carbon content. Slag-free dip tests and slag-containing dip tests with varying MgO concentrations were performed to investigate the influence of slag. Carbon transfer to the steel was controlled by steel penetrating into the refractory and dissolving carbon in dip tests where no slag was present. The rate limiting step for this mechanism is convective mass transport of carbon into the bulk steel. No detectable carbon transfer occurred in dip tests with 4 and 6 wt%C refractories without slag because no significant steel penetration occurred. Carbon transfer was controlled by the corrosion of refractory by slag in dip tests where slag was present"--Abstract, page iv.
Advisor(s)
Richards, Von
Smith, Jeffrey D.
Committee Member(s)
O'Malley, Ronald J.
Department(s)
Materials Science and Engineering
Degree Name
M.S. in Metallurgical Engineering
Sponsor(s)
Kent D. Peaslee Steel Manufacturing Research Center
Research Center/Lab(s)
Peaslee Steel Manufacturing Research Center
Publisher
Missouri University of Science and Technology
Publication Date
Summer 2016
Journal article titles appearing in thesis/dissertation
- Mechanism for carbon transfer from magnesia-graphite ladle refractories to ultra-low carbon steel
- Kinetics of carbon transport from magnesia-graphite ladle refractories to ultra-low carbon steel
Pagination
xiii, 64 pages
Note about bibliography
Includes bibliographical references.
Rights
© 2016 Andrew Arthur Russo, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Ladle metallurgy
Refractory materials
Carbon steel -- Testing
Thesis Number
T 10977
Electronic OCLC #
958293791
Recommended Citation
Russo, Andrew Arthur, "Carbon transfer from magnesia-graphite ladle refractories to ultra-low carbon steel" (2016). Masters Theses. 7567.
https://scholarsmine.mst.edu/masters_theses/7567