Effect of Flake Graphite Size on the Thermal Conductivity of Blast Furnace Carbon Refractories

S. Ge, B. Qiang, W. Zhang, Y.W. Li, X. Chen

The Key Laboratory Breeding Base of Refractories and Ceramics, Wuhan University of Science & Technology, 430081 Wuhan, China

Revision

Volume 2, Issue 3, Pages 107 - 110

Abstract

Five kinds of flake graphite are used to investigate the thermal conductivity of carbon refractories for a blast furnace with the aid of Xray diffraction (XRD), scanning electron microscopy (SEM), mercury porosimetry, and a laser thermal conductivity meter. The results indicated that the thermal conductivity of carbon samples increased with increasing flake graphite size, especially in the direction perpendicular to the shaping direction, and its anisotropy degree between the directions perpendicular and parallel to the shaping direction became larger. The composite graphite can increase the thermal conductivity of the specimen compared to single graphite in the direction parallel to the shaping direction and reduce the anisotropy degree between the directions parallel and perpendicular to the shaping direction.

Keywords

carbon refractories, flake graphite size, thermal conductivity, anisotropy

References

Copyright

© 2010 Göller Verlag