Hot-blast furnace with foamed silicate inner layer

US4022572A · kind A · utility

Assignee

• Didier-Werke AG · DE

Inventors

• Walter Klein · Katzwinkel, DE
• Heinrich Nobis

Key dates

• Filing date: Feb 5, 1976
• Grant date: May 10, 1977
• Expiry date: Feb 5, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21B9/06
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A hot-blast furnace of the type including an outer metal casing and an inner lining of insulating and refractory material has therebetween a layer of foamed glass or foamed silicate material having a structure of closed pores or small cells which are closed in an air tight manner to each other. The layer prevents passage of gas, during operation of the furnace, to the inner surface of the outer metal casing.