Process for melting and refining a charge

US5158590A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Dominique Jouvaud · Paris, FR
• Louis Pascarel · Gif-sur-Yvette, FR
• Bernard Genies · Les Ulis, FR

Key dates

• Filing date: Mar 18, 1991
• Grant date: Oct 27, 1992
• Expiry date: Mar 18, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/57
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Process for melting and refining a charge which is continuously introduced in raw condition at the inlet of a furnace and extracted in liquid condition at the bottom thereof, with heat transfer towards at least a substantial portion thereof by wall mounted flame burners directed towards the charge in which at least part of the flames result from the combustion of an industrial mixture of fuel and oxygen. For one or more of the flames in the refining zone, there is provided a pulsating combustion with cyclic variations of the oxygen and fuel feeds, including periods of maximum activity with flames of high heat capacity which alternate with periods of rest with substantially reduced and even completely nullified heat capacity. Application for example to the preparation of glass.