Method for melting glass

C - Chemistry – Metallurgy – 03 – B

Patent

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Details

C03B 5/235 (2006.01) C03B 5/43 (2006.01)

Patent

CA 2698879

The present invention is related to a method for the combustion of pulverized fuel as a heating source for melting raw materials for producing glass. The method including the steps of, feeding a regulated controlled flow of a mixture of pulverized fuel and air or gas under pressure for pneumatic transport in at least one distribution means; discharging the mixture of pulverized fuel and air or gas from feeding means toward at least one of said distribution means; regulating in a controlled manner the pulverized fuel-air or gas mixture from the distribution means to each of a plurality of burners in a glass melting region of a glass melting furnace; burning the pulverized fuel by means of the burners in the glass melting region of said glass melting furnace while providing a combustion flame with high thermal efficiency to carry out a controlled heating for melting the glass; and, counteracting erosive and abrasive effects of the pulverized fuel in the glass melting furnace by means of refractory materials. The refractory materials being selected of silica-alumina-zircon, magnesite, chrome-magnesite, magnesia- alumina spinel, alumina-silicate, zircon-silicate, magnesium oxide silica or alumina mixtures of the same.

La présente invention concerne un procédé destiné à la combustion de gazole pulvérisé utilisé comme source de chaleur de fusion des matières brutes servant à la production de verre. Le procédé comporte plusieurs opérations: introduction d'un flux régulé d'un mélange de gazole pulvérisé et d'air ou de gaz sous pression pour un transport pneumatique dans au moins un organe de distribution; décharge dudit mélange depuis l'organe d'alimentation en direction de l'un au moins desdits organes de distribution; régulation contrôlée dudit mélange partant de l'organe de distribution vers chacun des brûleurs de la zone de fusion du verre d'un four de verrerie; combustion du gazole pulvérisé au moyen des brûleurs dans ladite zone de fusion du verre tout en assurant une flamme de combustion de haut rendement thermique de façon à obtenir un chauffage contrôlé permettant la fusion du verre; et utilisation de matériaux réfractaires pour annuler l'action érosive et abrasive du gazole pulvérisé dans le four de verrerie. Les matériaux réfractaires sont choisis dans le groupe constitué de silice-alumine-zircon, magnésite, spinelle de magnésie-alumine, silicate d'alumine, silicate de zircon, d'hydroxyde de magnésium, ou certains de leurs mélanges avec la silice ou l'alumine.

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