Superrefractory dry ramming material based on zirconium oxide for the lining of induction-type crucible furnaces

US4513089A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Peter Kummer · Neuhausen, CH
• Gerhard Rehfeld · Aachen, DE

Key dates

• Filing date: Oct 25, 1983
• Grant date: Apr 23, 1985
• Expiry date: Oct 25, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/3244
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A superrefractory dry ramming material based on zirconium oxide for the lining of induction-type crucible furnaces comprising a zirconium oxide low in SiO.sub.2 and conventionally stabilized with CaO, MgO, Y.sub.2 O.sub.3, rare earths or their mixed oxides which has a particle size ranging from 0 to 8 mm, and from 5 to 40 weight percent finely divided monoclinic, fused zirconium oxide containing less than 0.5 weight percent SiO.sub.2.