Process of producing sintered magnesia

US3987135A · kind A · utility

Assignee

• Osterreichisch-Amerikanische Magnesit Aktiengessellschaft · AT

Inventors

• Erich Eigner · Lödersdorf, AT
• Robert Bergmann · Regensburg, DE

Key dates

• Filing date: Apr 19, 1972
• Grant date: Oct 19, 1976
• Expiry date: Apr 19, 1992

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An improved process of forming sintered magnesia bodies from a magnesium hydroxide aqueous slurry wherein the slurry is dried to a moisture content where the solids can be compacted to self-supporting bodies, preferably about 5 to 8% moisture, by heating at a temperature below the dissociation temperature of the magnesium hydroxide, compacting the dried magnesium hydroxide into briquettes, heating the briquettes at a temperature above the dissociation temperature of magnesium hydroxide to form magnesia, re-compacting to form new briquettes of greater density, and heating to sintering temperature to sinter the briquettes.