| 摘要 |
An insulating composition useful for riser sleeves, hot tops, ladle liners, and the like articles for use in casting of molten ferrous metal is described. The composition comprises 30% to 50% refractory fiber, 1% to 35% granular silicon carbide, inorganic binder, organic binder, and refractory filler. Molten steel at temperatures on the order of 3,000 DEG F can be readily handled by the articles of this composition. They also afford superior heat insulating properties and in the form of riser sleeves allow molten metal in a riser to remain molten for a longer period before solidification.
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