Process for calcining pellet-shaped calcium hydroxide

US3998928A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Joachim Stendel · Münstermaifeld, DE
• Wilhelm Portz · Lechenich, DE
• Georg Strauss · Lechenich, DE
• Heinrich Weiler
• Gunther Moormann
• Horst Witt

Key dates

• Filing date: Feb 12, 1975
• Grant date: Dec 21, 1976
• Expiry date: Feb 12, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/40
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Pellet-shaped calcium hydroxide forming part of the mixture of flux and ores in electrothermal calcium carbide furnaces is calcined. The pellets are made by granulating or briquetting moist calcium hydroxide, delivered to a sintering grate and conveyed thereon through a heating zone, wherein high temperatures are produced by the combustion of gas, above the grate, and wherein the combustion gas is exhausted, below the grate. The calcium hydroxide pellets are more especially placed on to the grate, covered with a layer of broken limestone and the undried pellets are directly conveyed through the heating zone, in an apparatus for carrying out the process.