Method and tunnel type furnace for calcining carbonaceous bodies, in particular electrodes

US4674975A · kind A · utility

Assignees

• Alusuisse Italia S.p.A. · IT
• Italimpianti Societa Italiana Impianti p.A. · IT
• Sirma S.p.A. · IT

Inventors

• Renzo Corato · Mestre, IT
• Giulio Ganapini · Genova, IT
• Hans-Anton Meier · Milano, IT
• Mauro Poggi · Genova, IT
• Antonio Rosso · Pavullo nel Frignano, IT
• Sergio Sanchioni · Bergamo, IT

Key dates

• Filing date: Sep 23, 1985
• Grant date: Jun 23, 1987
• Expiry date: Sep 23, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27M2001/04
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

The method comprises passing preformed bodies to be calcined, containing pyrolyzable substances, through a furnace having, arranged in succession, a first heating zone, a second or combustion zone wherein volatile substance released by said bodies are subjected to combustion, a third or calcining zone, and a fourth or cooling zone. Separation means between the first and second zones, and between the third and fourth zones, prevent the flue gases from flowing between such zones.