A method of making alumina and MgO preheatable insulating refractory liners and methods of use thereof.

摘要

The preheatable molded refractory insulating liners comprise a liner structure of predetermined shape, the liner structure comprising a molded uniform mixture containing a particulate refractory component comprised of alumina and MgO refractory grain and a binder therefore wherein the alumina and MgO refractory grain are in amounts proportioned such that the hot strength is developed at vessel preheat and metal casting temperatures which are in the range of about 1900 DEG F to about 3000 DEG F when such liners are heated for sufficient periods of time.