| 摘要 |
A combination of an exothermic insulating liner and refractory ring for use in a metal hot top casing that is hot. The liner composition comprises by weight from 4 - 6% low water content asbestos, from 4 - 6% high water content asbestos, from 65 - 75% sand, from 12 - 16% silica flour and from 3 - 6% resin binder; and the refractory ring composition comprises by weight from 6 - 9% asbestos, from 87 - 90% sand and from 3 - 4.5% resin binder.
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