| 摘要 |
PURPOSE:To produce a low conductive graphite-containing refractory by incorporating an oxide aggregate of one or more kind of Al2O3, MgO and spinel, a flake graphite having specific average particle diameter and metal powder in a specific ratio. CONSTITUTION:A blended material is obtained by blending <=6wt.% Sic (hereinafter %), 85-94% oxide aggregate of one or more kind of Al2O3, MgO and spinel and 6-15% natural flake graphite 75-15mum in average particle diameter and >=90% in 44-200mum particle diameter. Next, 2-4% Al metal powder or alloy powder containing >=60% Al is added into the blended material in external multiplication and further an adequate quantity of blender is mixed. After that, the mixed material is press molded and fired in a reducing atmosphere to obtain the low heat conductive graphite containing refractory. |
