| 摘要 |
PROBLEM TO BE SOLVED: To obtain a patching material having high bonding strength between the carbon source and other materials and excellent corrosion resistance and oxidation resistance as compared to a conventional product and having a durable life for use by kneading a material containing zirconia, SiC, metal powder and graphite, compacting, firing and granulating to obtain a specified grain size and then incorporating the obtd. granulated material by a specified amt. into the patching material. SOLUTION: A source material containing zirconia, SiC, metal powder (such as metal silicon powder) and preferably 5 to 30wt.% graphite is kneaded, compacted, fired and granulated into <=5mm grain size to obtain a granulated material. The obtd. granulated product is further compounded by 35 to 80wt.% with a clay, silica sand or alumina brick chips having preferably <=5mm grain size by 20 to 65wt.% to obtain a patching material. The whole chemical compsn. of the patching material consists of, preferably by wt.%, 18.3 to 60.3% Al2 O3 , 11.0 to 62.1% SiO2 , 5.4 to 12.3% ZrO2 , 1.2 to 3.6% SiC, 0.49 to 1.1% metal Si and the balance carbon. |
