Patents Assigned to Steetley Limited
  • Process for making magnesia
    Patent number: 4033778
    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.
    Type: Grant
    Filed: May 9, 1975
    Date of Patent: July 5, 1977
    Assignee: Steetley Limited
    Inventors: William Cecil Gilpin, Noel Heasman, John Williamson