| 摘要 |
Porous refractory shapes having sufficient strength for use as thermal insulation in metal melting furnaces at insulation service temperatures of 3,400 DEG to 3,900 DEG F are formed in place by bonding refractory particles of alumina, for instance, with aluminum hydroxide generated by the reaction of aluminum with water in the presence of a corrosion accelerator, and either with or without a reaction control agent satisfactory for eliminating or significantly suppressing the evolution of hydrogen, nitrogen dioxide, hydrogen chloride, or the like from the reacting mass or for reducing the rate of reaction corrosion.
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