Glass forming compound and brick made therewith

US4303449A · kind A · utility

Assignee

• Refratechnik Holding GmbH · DE

Inventors

• Peter Bartha · Bovenden, DE
• Alexander Tutsek · Göttingen, DE

Key dates

• Filing date: Feb 15, 1980
• Grant date: Dec 1, 1981
• Expiry date: Feb 15, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C3/062
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass forming compound having in its melted glass phase the formula Si.sub.2 AlO (PO.sub.4).sub.3 or 4 SiO.sub.2.Al.sub.2 O.sub.3.3P.sub.2 O.sub.5 is provided together with grain mixtures for producing refractory thermally insulating bricks adapted for use in the preheating zone of a rotary cement kiln operating in an atmosphere containing alkali chlorides, particularly KCl. The bricks develop a glass layer on the kiln exposed face thereof which resists penetration by alkalis, particularly KCl.