棕刚玉是以优质磨料级矾土为原料，配以辅料，于电弧炉利2250℃以上离温精炼制成剧火度在1850℃以上。Brown Fused AMxma is fused in the electric-arc furnace under the high temperature dabove 2250t with吻h quality abrasive bauxite as rawmaterial and matched勿the carbon material and scr叩Uon.The degree of refractory is more than 1850℃.