| 摘要 |
PROBLEM TO BE SOLVED: To prevent the wear of a refractory by performing hot coating of graphite of a prescribed content ratio on the surface of ceramic particles containing magnesium oxide, aluminum oxide and calcium oxide of a prescribed composition and with a prescribed grain size using thermosetting phenol resin. SOLUTION: Natural flake graphite or an artificial graphite powder of 0.5-10wt.% to a ceramic raw material is hot-coated on the surface of natural or synthesized ceramic particles in the range of 5-0.1mm in grain size having the composition consisting of, by weight, one or two or more kinds of 30-99.5% magnesium oxide, 50-99.5% aluminum oxide, and 20-90% calcium oxide using 0.1-5wt.% thermosetting phenol resin to the ceramic raw material. The repair efficiency is improved by 30-40%, and the consumption basic unit is reduced. |
