SPRAYING MATERIAL FOR REPAIRING LINING OF STEELMAKING ELECTRIC FURNACE AND METHOD FOR REPAIRING LINING OF STEELMAKING ELECTRIC FURNACE USING THE SAME

摘要

PPROBLEM TO BE SOLVED: To allow a magnesia-olivine-based spraying material to exhibit excellent repairing effects under operation conditions of a steelmaking electric furnace by improving adhesion of the magnesia-olivine-based spraying material and utilizing the effects of corrosion resistance and resistance to the penetration of slag possessed by magnesia-olivine. PSOLUTION: In a spraying material for repairing the lining of a steelmaking electric furnace, a refractory raw material comprising coarse particles and fine particles, each containing 25-80 mass% fired olivine and the balance being mainly fired magnesia and/or electrofused magnesia, and a binder are blended, and the coarse particles having particle sizes of 1 mm contained in the refractory raw material is composed of only fired olivine or a mixture in which the ratio of the fired olivine is higher than the ratio of the fired magnesia and/or the electrofused magnesia. PCOPYRIGHT: (C)2007,JPO&INPIT