作者：YUYA UCHIDA;KATSUMI MORIKAWA;JYOUKI YOSHITOMI;

作者单位：Krosaki Harima Corp.;Krosaki Harima Corp.;Krosaki Harima Corp.

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2010-01-05

卷：30

期：2

起页：132

止页：132

分类号：TQ175

语种：英文

关键词：

内容简介

The powder line material of submerged nozzles for continuous casting of steel, require high corrosion resistance because the mold powder tends to form a molten slag which contacts and reacts with the refractory nozzle. Therefore, a refractory of ZrO_2-C type (hereafter called ZG), which has low reactivity with the molten slag has generally been used. Until now, for the purpose of improving the properties of ZG refractories, such factors as ZrO_2 content, additives, coarse particle species, particle size compositions, density, etc., have been investigated. However, few studies have been done on the relationship between the internal crack population of the ZrO_2 aggregate and the corrosion resistance. So this study was conducted, using two different kinds of ZrO_2 with different contents of internal defects (cracks), to investigate their effect on the refractory corrosion and spalling resistance.