Krosakiharima Corporation

Jyouki Yoshitomi

Keisuke Asano

Toshihiro Suruga

Toshiyuki Hokii

Hiroyuki Fuchimoto

A configuration in which particles of pitchhaving a softening point in the range of 70 to 200&#xb0; C. and a diameter equal to or smaller than 30 &#x3bc;m are held on the surfaces of particles of a refractory raw materialhaving a diameter equal to or smaller than 50 &#x3bc;m is employed. This pitch-containing refractory raw materialcan be used with the pitch being in a fine-particle form without any aggregation even after the long-term storage. Using it as a part of a raw material formulation allows the fine particles of pitch to be uniformly dispersed during the mixing or kneading process. The resulting carbon-containing refractory has an excellent corrosion resistance. It also provides suppressed increase in the Young's modulus while maintaining the level of strength, thereby being excellent in thermal spalling resistance even with the carbon content ratio being low.

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Kitakyushu, Japan

Jyouki Yoshitomi