Masters Theses

Abstract

"Refractory selection for ferrous foundry applications has always been a challenging and important issue. Both in the cupola and the induction furnace, refractory life and performance directly affect the efficiency and the productivity of the process. The goals of this research were to study the interaction of different refractory materials used in the foundry with metal and how these interactions affect the efficiency of the process.

In the cupola, silicon carbide is added to fulfill the dual roles of a graphitizer and a source of carbon. Its recovery depends on its friability and wettability in the cupola environment. This research investigated the effect of temperature on the friability of different industrial grades of silicon carbide briquettes. The dissolution of silicon carbide in five different types of cupola slags was also studied. It was found that less silicon carbide was lost with increasing silicon carbide content of the briquettes and increasing slag basicity.

Dry vibratable refractories are widely used for induction melting in steel foundries. This research investigated the performance of dry vibratable refractories with various levels of spinel content during induction melting. Results indicated that refractory performance impro ed with increasing spinel formation in the alumina based refractories but showed erratic behavior in the magnesia based refractories. Overall, the performance of the magnesia based refractories was better than the alumina based refractories"--Abstract, page iv.

Advisor(s)

Peaslee, Kent D., 1956-2013

Committee Member(s)

Smith, Jeffrey D.
Richards, Von

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Spring 2003

Journal article titles appearing in thesis/dissertation

  • Effect of Temperature on the Friability of Silicon Carbide in the Cupola
  • Disintegration and Wetting Behavior of Silicon Carbide Briquettes
  • Effect of Spinel Formation on Refractory Performance in Induction Furnaces Melting Steel

Pagination

xiii, 70 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2003 Aryama-Dutta Saikia, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Silicon carbideRefractory materialsMaterials at high temperaturesCupola furnaces

Thesis Number

T 8212

Print OCLC #

53185683

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