Abstract

Ladle design and ladle practices have a significant effect on a foundry operation and product quality. Large steel temperature losses or instabilities in the pouring temperature are frequently compensated by tapping at higher temperatures dramatically increasing furnace and ladle lining wear, oxidation of the steel, alloying element losses, and energy consumption in steel melting. Ladle lining materials need to satisfy a complex array of often conflicting requirements. For example, ceramic materials for linings must possess a high strength at liquid steel temperatures to prevent erosion and crack formation. However, linings need to also have a low thermal conductivity which typically increases as the strength improves. Temperature problems became more severe with decreasing ladle size. This paper summarizes test work of new lining materials in a 100 lb liquid metal capacity ladle in the UMR foundry designed with a temperature measurement system installed in the lining. Several different working linings materials were tested under similar conditions. Results from these foundry experiments were compared with thermal conductivity measurements in the laboratory and computation fluid dynamic modeling results. From this work, UMR's newly developed porous alumina linings were shown to have properties that could result in significantly lowering energy requirements in steel foundries.

Meeting Name

60th SFSA Technical and Operating Conference

Department(s)

Materials Science and Engineering

Sponsor(s)

Steel Founders' Society of America
United States. Department of Energy

Keywords and Phrases

Steel Casting Production; Steel Foundry Operations; Steel Melting

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2006 Steel Founders' Society of America (SFSA), All rights reserved.


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