作者：SATOI KANATANI;MASAKAZU IIDA;EIZO MAEDA;

作者单位：Shinagawa Refractories CO., LTD. 707, Inbe, Bizen-shi, Okayama 705-8577;Shinagawa Refractories CO., LTD. 707, Inbe, Bizen-shi, Okayama 705-8577;Shinagawa Refractories CO., LTD. 707, Inbe, Bizen-shi, Okayama 705-8577

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2009-01-05

卷：29

期：3

起页：193

止页：199

分类号：TQ175

语种：英文

关键词：Trough;Metal line castable;NiO;Oxidation;SiC;

内容简介

Castable refractory of alumina (Al_2O_3) - spinel (MgAl_2O_4) - silicon carbide (SiC) - carbon (C) composition is commonly used for the metal line (ML) in the main trough of a blast furnace. The effect of NiO powder addition to this main trough castable was studied and described, focusing on the oxidization behavior of SiC at high temperature (1400 deg C). In general, the SiC in the castable tends to react with CO(g) forming SiO(g) which dissipates from the system. With NiO powder addition, this reaction is promoted because of the higher equilibrium vapor pressure of Ni. But instead of escaping, SiO(g) reacts with Ni(g) to form NiO-SiO_2 glassy phase in the castable, causing densification of the castable microstructure. This effect indicates the possibility of improving the castable physical properties, particularly the physical rigidity and reliability of repaired castable.