Method for operating a glass melting furnace

B - Operations – Transporting – 09 – B

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B09B 3/00 (2006.01) C03B 3/00 (2006.01) C03B 3/02 (2006.01) C03B 5/00 (2006.01) C03B 5/027 (2006.01) C03B 5/20 (2006.01) C03B 5/26 (2006.01) C03B 7/02 (2006.01) C03C 1/00 (2006.01) G21F 9/30 (2006.01)

Patent

CA 2005314

A method of operating a glass furnace especially for vitrification of ecologically hazardous waste materials such as asbestos or asbestos-containing demolition material, sewage sludge, varnish mud, ashes, filtering dust and the like and relates to the operation of a furnace with molten glass topped by a batch layer which contains the waste materials. The batch layer is fed from the outside into the interior of the furnace, and the required heat energy is produced by means of heating installations in the glass melting furnace. The molten glass produced from waste materials and admixtures is drawn from the furnace through an outlet. The method is characterized specifically by producing on the surface of the molten glass a liquid layer of gall composed of alkaline salts, which, by drawing off as desired, is kept at a thickness layer range that corresponds to the respective furnace/operating conditions and which keeps the batch layer on top of the molten metal at a preferred thickness layer range that corresponds respectively to the furnace operating conditions by means of a controlled feeding and distribution of the appropriately composed mixture.

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