Method and apparatus for separating out gall during glass melting processes
Patent 5683484 Issued on November 4, 1997. Estimated Expiration Date: 
December 18, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 18, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3208841 3294512 3362808 3375095 3385688 3482956 3573019 3592151 Method of melting a raw bath and a glass furnace for performing the method Energy saving method of melting glass InventorsApplicationNo. 574389 filed on 12/18/1995US Classes:65/134.5, By injecting gas below surface of molten glass65/134.8, By melting toxic or waste material65/327, At orifice65/347, MELTING POT OR FURNACE WITH STRUCTURALLY DEFINED DELIVERY OR FINING ZONE588/254, Contains asbestos588/256, Waste contains heavy metal (e.g., fly, ash, flue dust, and incinerator ash)588/900APPARATUSExaminersPrimary: Czaja, Donald E.Assistant: Vincent, Sean Attorney, Agent or FirmForeign Patent References
International ClassC03C 005/193Foreign Application Priority Data1994-12-25 DEAbstractAn electrically heated tank furnace is used to melt glass whereby a floating gall layer is formed on the melt, in particular during the vitrification of hazardous materials such as asbestos, fly ash, filter dust, whereby the tank of the furnace is fitted with a discharge outlet for the melt and an overflow channel with an inlet for the gall. A stream of ascending gas bubbles is produced in the melt. In order to promote better and automatic draining of the gall the stream of gas bubbles is produced directly in front of the overflow channel which thereby maintains a layer of liquid gall in the overflow channel and a layer of molten glass retained by a weir on the bottom of the overflow channel. The temperature in the overflow channel is chosen to be above the melting temperature of the gall, whilst the bottom layer of glass is maintained at a temperature at which the viscosity of the glass is so high that the glass does not drain out the overflow channel.Other References
Field of SearchWith temperature modification at orificeRegulating or arresting of flow into or out of orifice By injecting gas below surface of molten glass By melting toxic or waste material At orifice MELTING POT OR FURNACE WITH STRUCTURALLY DEFINED DELIVERY OR FINING ZONE Waste contains heavy metal (e.g., fly, ash, flue dust, and incinerator ash) Contains asbestos APPARATUS | |
