| 摘要 |
PROBLEM TO BE SOLVED: To permit safe and stabilized operation of a furnace as well as the improvement of a durable life and reduce the chance of maintenance work by employing refractories, capable of elongating the durable life of a lining material. SOLUTION: Refractories for lining an induction furnace employed upon smelting and/or refining a metal are constituted of an operating layer formed of shaped refractories. In this case, the shaped refractories are formed of a body, consisting of 3-15 wt.% of silicon carbide material, 55-97 wt.% of alumina material and 0-30 wt.% of mullite material while the total sum of the materials is 90 wt.% and the content of 3 constituents of SiC, Al2O3 and SiO2 is not less than 85 wt.%, which are mixed and kneaded while adding proper amount of organic or inorganic deflocculating agent and/or 0.8-5 wt.% of curing agent. The porosity of the shaped refractories is specified so as to be not higher than 15 wt.%. According to this method, dry type monolithic refractories containing not less than 97 wt.% of alumina, which is most generally employed, is formed integrally and previously in a factory by integrating the silicon carbide material, the alumina material and the mullite material whereby a packing density can be increased.
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