| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that a molten metal outlet of a conical type ladle for centrifugal casting is damaged by thermal shock and the like and must be mended for each casting. SOLUTION: The molten metal outlet 2, i.e., a head of a tilting base 1 of the conical type ladle, is formed by a compound refractory layer together with an inner iron plate 21 installed vertically on an enclosed iron plate 11 up to the top surface of a refractory mortar 13, a porous iron plate 22 fastened perpendicular to the enclosed iron plate 11 in parallel with the inner iron plate 21 at intervals, which is integrally bonded to the inner iron plate 21 by using both a front refractory mortar 25 covering both sides of the iron plate while filling and communicating numerous porosity 23 of the iron plate and a rear refractory mortar 24. As the integrally bonded compound refractory layer will not be fallen off even if a gap or a crack is generated when used, it may bring a marked improvement in durability than ever before. In practice, an open area ratio of the porous iron plate is 5-35%, most desirably 20%. COPYRIGHT: (C)2003,JPO
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