Patent ID: 6987077
Filing Date: 2006-01-17
Classification: C04B,Y02P

Abstract:
1. A fired spinel complex oxide produced by firing a mixture containing a slag by-produced in chromium refining, a reducer, and a material containing silica, the fired spinel complex oxide being essentially composed of: 29 to 40 percent by weight of Fe 15 to 20 percent by weight of Al 9 to 14 percent by weight of MgO; 0 to 4 percent by weight of Na 9 to 17 percent by weight of Cr 14 to 20 percent by weight of SiO 2 percent by weight or less of CaO, wherein the fired spinel complex oxide has a diffraction intensity ratio b/a of 0.1 or less, the diffraction intensity ratio b/a being a ratio of the peak intensity b of the material containing silica in the vicinity of 2θ=26.7° to the {113} plane peak intensity a in the vicinity of 2θ=36° in the Cu—Kα X-ray diffraction pattern thereof.