System for preventing excess pressure in a gap between a double-shell structure of a blast heating apparatus

US4460335A · kind A · utility

Assignee

• Didier-Werke AG · DE

Inventors

• Kurt Braun · Goleta, US
• Friedrich Eschmann · Ginsheim-Gustavsburg, DE

Key dates

• Filing date: May 5, 1983
• Grant date: Jul 17, 1984
• Expiry date: May 5, 2003

Classification

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

Abstract

A blast heating apparatus includes an inner metal shell and an outer metal shell defining therebetween a gap filled with at least one pourable dry material, for example a mixture of SiC and graphite. To prevent excess pressure in the gap and to prevent condensate from entering the gap and attacking the outer shell, a piping system connects the gap to an area below the grate chamber of the blast heating apparatus.