Effect of Temperature on the Friability of Silicon Carbide in the Cupola


Silicon carbide briquettes are frequently used as cupola charge material to fulfill the dual roles of a graphitizer and a source of carbon. During the descent from charging to the hearth, silicon carbide briquettes disintegrate and fines are generated. The fines are lost either to the flue gas or to the slag. This significantly decreases the efficiency of the silicon carbide additions. Therefore, the purpose of this study is to understand the effects of the cupola environment on the integrity of the briquettes. Samples of three industrial grades of silicon carbide briquettes were fired and ground in a jaw crusher to determine the influence of temperature and composition on friability. It was determined that the friability of the silicon carbide briquettes increased as the silicon carbide content decreased.


Materials Science and Engineering

Research Center/Lab(s)

Peaslee Steel Manufacturing Research Center

Keywords and Phrases

Cupola Charge Material; Graphitizer; Silicon Carbide Briquettes; Carbon

Document Type

Article - Journal

Document Version


File Type





© 2003 American Foundry Society (AFS), All rights reserved.

Publication Date

01 Jan 2003