Castable refractory for slide gate
AssigneeToshiba Ceramics Co., Ltd.
InventorsHisahiro Teranishi, Isao Imai, Toshihiro Indou
Life of this patent
Estimating the term…
Abstract
Castable refractory for a slide gate plate is mainly formed of alumina raw material and amorphous carbon raw material of 2 to 15 wt %, and contains silicon carbide and/or boron carbide, the total content thereof being equal to 0.5 to 10 wt % (the content of boron carbide is equal to or less than 3 wt %, and when the content of boron carbide is less than 0.5 wt %, silicon carbide is set to 3 wt % or more), 2 to 10 wt % magnesia of 1 mm or less in particle size, 0.2 to 3 wt % silica fine powder of 5 micrometers or less in particle size, and 0.1 to 5 wt % salt of condensate of formalin and aromatic sulfonate.
Claims4
A castable refractory for a slide gate plate comprising (a) an alumina raw material, (b) 2 to 15 weight percent of an amorphous carbon raw material, (c) 0.5 to 10 weight percent of silicon carbide and/or boron carbide, (d) 2 to 10 weight percent magnesia having a particle size of 1 mm or less, (e) 0.2 to 3 weight percent fine silica powder having a particle size of 5 micrometers or less, and (f) 0.1 to 5 weight percent of a condensate salt of formalin and an aromatic sulfonate, wherein in part (c), the total amount of boron carbide is 3 weight percent or less and when the content of boron carbide is less than 0.5 weight percent, the amount of silicon carbide is 3 weight percent or more.
A castable refractory for a slide gate plate comprising (a) an alumina raw material, (b) 2 to 15 weight percent of an amorphous carbon raw material, (c) 3 to 10 weight percent of silicon carbide or 0.5 to 3 weight percent boron carbide, (d) 2 to 10 weight percent magnesia having a particle size of 1 mm or less, (e) 0.2 to 3 weight percent fine silica powder having a particle size of 5 micrometers or less, and (f) 0.1 to 5 weight percent of a condensate salt of formalin and an aromatic sulfonate.
Dependencies are inferred from the claim text.