| 摘要 |
PURPOSE: To provide zirconia melt cast refractories which have excellent corrosion resistance to fused glass and less generate air bubbles at a high yield by rotating a casting mold around a revolving shaft and solidifying the zirconia melt in this casting mold in the state of imparting centrifugal force to the zirconia melt. CONSTITUTION: This process comprises casting the zirconia melt cast refractories contg. >=33wt.% (more preferably 88 to 97wt.%) ZrO2 component by using the casting mold. The casting mold 2 having a sprue 6 is embedded and fixed into a heat insulating material 4 housed in a flask 5 fixed to a turntable 7 of a rotating device 1 and is rotated around the revolving shaft 3. The melt of the raw material poured into the casting mold is solidified in the state of applying >=1.2G (more preferably 1.5 to 3.5G) centrifugal force thereon on at least a part of the melt. The solidified matter taken out of the casting mold is merely subjected to cutting off of the small volumetric part where voids exist deviating. The product yield is thus greatly improved. |
