| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for maintaining a tundish that hardly casues peeling-off trouble of a repairing material and a covering material. SOLUTION: The method for maintaining the tundish includes: (a) a step of cooling the tundish having finished continuous casting and removing residual steel slag inside the tundish and a deteriorated lining refractory; (b) a step of suppressing a rate of minute particles with a particle diameter of <75μm occupying refractory aggregate to≤25 mass%, using powdery silicate indicating≥40 mass% of solubility when dissolved in 10°C water for five minutes as a binder, and spraying the repairing material containing a hardening accelerator formed of a lime compound to the inner surface of the tundish together with working water; and (c) a step of spraying a covering material containing≥35 mass% of the minute particles with the particle diameter of <75μm with respect to the refractory aggregate to the sprayed body of the repairing material together with the working water. COPYRIGHT: (C)2011,JPO&INPIT
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