Process for making magnesia
AssigneeSteetley Limited
InventorsWilliam Cecil Gilpin, Noel Heasman, John Williamson
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Abstract
A process for making magnesia wherein a sludge of magnesium hydroxide is simultaneously dewatered and compacted to give a cake of magnesium hydroxide containing at least 67.5% by weight of solids and having a green bulk density of at least 1.15 grams/cc and wherein the cake thereby obtained is converted by a suitable heat treatment into magnesium oxide. Refractory products produced from the magnesia of the invention are also described.
Claims13
In a process for producing a refractory material in which an aqueous suspension of magnesium hydroxide is dewatered and the dewatered solid thus obtained is calcined to form the desired refractory, the improvement which comprises dewatering the aqueous suspension of the magnesium hydroxide at a pressure which is greater than 400 lbs per square inch to give a cake of magnesium hydroxide containing at least 67.5% by weight of solids and having a green bulk density of at least 1.15 grams/cc.
Dependencies are inferred from the claim text.