Process for producing refractory material
AssigneeThe Dow Chemical Company
InventorAlan M. Hart
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Abstract
An improvement in a process for producing refractory material by sintering compacts of particles of a calcined ceramic compound is disclosed. The improvement comprises heating the compacts in a fluidized bed maintained at a temperature sufficient to sinter the compacts.
Claims10
In a process for the densification of calcined magnesium oxide by sintering compacts of particles of the calcined magnesium oxide, the improvement which comprises:
- a. heating the compacts within the temperature range of from about 1450.degree. C to about 1550.degree. C in a fluidized bed of particles containing magnesium oxide;
- and
- b. retaining the compacts within the fluidized bed of particles for a sufficient time to sinter the compacts to a material having a bulk density of at least about 93 percent of the theoretical bulk density of the calcined magnesium oxide compacts heated in the fluidized bed.
In a process for producing sintered magnesium oxide by sintering compacts of particles containing at least about 96 percent by weight calcined magnesium oxide, said compacts having their longest dimension from about 0.006 inch to about 0.500 inch, the improvement which comprises:
- a. heating the compacts within the temperature range of from about 1450.degree. C to about 1550.degree. in a fluidized bed of particles containing magnesium oxide;
- and
- b. retaining the compacts within the fluidized bed of particles for a sufficient time to sinter the compacts to a material having a bulk density of at least about 3.35 grams per cubic centimeter.
Dependencies are inferred from the claim text.