Title: Process for making magnesia

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.

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Inventors: Gilpin, William Cecil (near Worksop, EN)
Heasman, Noel (near Hartlepool, EN)
Williamson, John (near Hartlepool, EN)

Application Number: 576208
Filing Date: 1975-05-09
Publication_date: 1977-07-05
Assignee: Steetley Limited (EN)
Primary Class(es): 501/114 423/636, 501/108
Other Classes:
US Patent Ref:

2313746	Mar, 1943	Heany	264/56.
2493752	Jan, 1950	De Maestri	423/164.
2571134	Oct, 1951	Hicks	106/59.
2823134	Feb, 1958	Atlas	106/58.
3378615	Apr, 1968	Zisner et al.	423/636.
3573079	Mar, 1971	Shibasaki et al.	106/58.

Other Refs: 1,240,4661,115,386

Jul, 1971	UK.
May, 1968	UK

Primary Examiner: Poer, J.
Assistant Examiner:
Attorney: Bacon & Thomas