Method for baking or calcination of shaped carbon bodies in a furnace

US6042801A · kind A · utility

Assignee

• NORSK HYDRO ASA · NO

Inventors

• Hogne Linga · Sogndal, NO
• Arne Werge-Olsen
• Lene Navestad Solli

Key dates

• Filing date: Dec 13, 1996
• Grant date: Mar 28, 2000
• Expiry date: Dec 13, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B35/52
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention concerns a method for baking or calcination of shaped carbon bodies in a furnace and a packing material for use in the same. In accordance with the method, carbon bodies are burned in a furnace chamber, supported or surrounded by a packing material which is formed from a mixture of a material containing carbon and particles of a material containing silicon oxide such as crushed chamotte stone. In accordance with the method, the baking of the carbon bodies will take place at a greater temperature gradient across the packing joint than previously, which results in greater tar combustion and better utilisation of the energy in the degasified components. Furthermore, a packing material is described that contains a component containing carbon and that also contains particles containing silicon oxide in a homogeneous mixture with the component containing carbon. The component containing carbon can be a granulate such as pellets of a mass that comprises dust containing carbon and a binder of tar/pitch. The dust containing carbon in the mass can be made up of butt filter dust which contains sodium and fluorine. The mass can also contain a powder/dust of a material con…