METHOD FOR OPERATING A GLASS MELTING FURNACE

• Main Authors: SORG, HELMUT, ZSCHOCHER, HARTMUT, PIPE, HELMUT
• Format: Patent
• Language: English; Korean
• Published: 20.03.1993
• Edition: 5
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; DECONTAMINATION ARRANGEMENTS THEREFOR; DISPOSAL OF SOLID WASTE; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PERFORMING OPERATIONS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; RECLAMATION OF CONTAMINED SOIL SOIL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

The invention relates to a process for operating a glass-melting furnace, in particular for the vitrification of waste materials polluting the environment, such as asbestos or asbestos-containing demolition material, sewage sludges, paint sludges, ashes, filter dusts and the like, a glass melt and, on top thereof, a mixed layer containing the waste materials being present in the furnace during operation, the mixture being fed from the outside into the interior of the furnace, the required heat energy being generated by heating devices in the glass-melting furnace, and the glass smelted from the waste materials and additives being discharged from the furnace through an outlet. A disadvantage here is that large quantities of waste gas, which have to be purified, are formed and that the energy consumption is high. To improve the process, it is proposed to produce a liquid scum layer of alkali metal salt or alkaline earth metal salt on the surface of the glass melt and to maintain this in a layer thickness range corresponding to the particular operating states of the furnace by discharge as required and/or to maintain the mixed layer on the glass melt in a layer thickness range corresponding to the particular operating states of the furnace by controlled introduction and distribution of mixture in suitable compositions. In this way, an improved heat transfer between the melt and mixture and extensive binding of waste gases into the scum and/or into the mixture are achieved.