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| Number | Title | Issue Date |
| 8051680 | Heating glassmaking materials with radiative heat transfer Heat in a stream of combustion products obtained from a glassmelting furnace heated by oxy-fuel combustion is passed to incoming glassmaking materials in a heat exchanger without requiring reduction of the temperature of the stream yet without causing softening of t... | 11/08/2011 |
| 7383698 | Method of manufacturing glass melt and method of manufacturing molded glass material A method of manufacturing glass melt and a method of manufacturing molded glass material by forming glass melt. In the method of manufacturing glass melt, the glass melt containing fluorine is prepared by melting glass raw materials and refining the resulting glass ... | 06/10/2008 |
| 7296440 | Device and method for melting glass When waste glass that is strongly laden with organic impurities is melted, the organic constituents present in the melt give rise to so-called “black hearts” which can no longer be eliminated in a subsequent refining process, thus impairing the quality of the gl... | 11/20/2007 |
| 7191619 | Process for producing glass and glass-melting apparatus thereof A process for producing a high-quality glass from highly reactive raw materials and a glass-melting apparatus for use therewith, comprising the step of charging a material for the glass to a molten glass in a heated vessel, (1) wherein an oxidizing gas is bubbled in... | 03/20/2007 |
| 7168269 | Gas injection for glass melting furnace to reduce refractory degradation A glass melting furnace has a gas inlet positioned proximate to a charging section oxy-fuel combustion region to introduce gas into the region and to at least partially displace gas having a partial pressure of alkali vapor from the region, and optionally a gas outl... | 01/30/2007 |
| 7021082 | Method and apparatus for suppressing oxygen bubble formation in glass melts In the method of making glass a glass melt is formed from starting materials in a melt apparatus, which includes at least one metal part having a metal surface in contact with the glass melt in a first region of the glass melt having a predetermined oxygen partial p... | 04/04/2006 |
| 7010940 | Process for producing glass and glass-melting apparatus thereof A process for producing a high-quality glass from highly reactive raw materials and a glass-melting apparatus for use therewith, comprising the step of charging a material for the glass to a molten glass in a heated vessel, (1) wherein an oxidizing gas is bubbled in... | 03/14/2006 |
| 6862899 | Method and apparatus for heating glass melting furnaces with fossil fuels During the heating of glass melting furnaces having a combustion chamber with regenerators for preheating oxidation gases, with port necks that open into the combustion chamber, with primary burners and with secondary burners that are installed in a cascade arrangem... | 03/08/2005 |
| 6705118 | Method of boosting a glass melting furnace using a roof mounted oxygen-fuel burner In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material. A method o... | 03/16/2004 |
| 6705117 | Method of heating a glass melting furnace using a roof mounted, staged combustion oxygen-fuel burner In an industrial glass furnace, which optionally contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material, at least one staged combustion oxy-fuel burner is mounted in the roof of the furnace to provide heat to ... | 03/16/2004 |
| 6698245 | Production of vitreous fibres using high halogen mineral waste as an ingredient Rock fibres are made from a melt formed from a blend of low and high halogen waste materials. 80 to 98% are low halogen materials (containing less than 0.5 wt. % halogen) and 2 to 20% are high halogen materials (containing at least 1 wt. % halogen).... | 03/02/2004 |
| 6615612 | Electrostatic batch preheater and method of using the same A method and apparatus is taught for preheating of glass batch materials by direct contact with glass furnace exhaust gases. Furnace gases 15 flow through a batch hopper 1 in horizontal tunnels formed by open bottom tubes 6, with a free surface of batch f... | 09/09/2003 |
| 6532771 | Method for controlling glass furnace atmosphere Glass is produced in a glassmelting furnace by combusting fuel and oxidant having an oxygen content greater than 80 vol. % oxygen in a melting zone to form molten glass, wherein the surface of the molten glass is exposed to the gaseous atmosphere in the m... | 03/18/2003 |
| 6532768 | Process for the vitrification of a pulverulent material and apparatus for implementing the process The present invention relates to a vitrification process for a pulverulent material and an apparatus for implementing said process. The process consists in introducing the pulverulent material into the fusion area of a furnace via injection means, where i... | 03/18/2003 |
| 6532767 | Methods for producing fused silica glass Methods for producing high purity fused silica (HPFS) glass having desired levels of dissolved hydrogen are provided. The methods involve measuring the level of hydrogen in the cavity of the furnace used to produce the glass and controlling the pressure w... | 03/18/2003 |
| 6519973 | Glass melting process and furnace therefor with oxy-fuel combustion over melting zone and air-fuel combustion over fining zone A process and furnace for melting glass is set forth wherein the majority of the combustion energy over the melting zone of the furnace is provided by oxy-fuel combustion while a majority of the combustion energy over the fining zone of the furnace is pro... | 02/18/2003 |
| 6422041 | Method of boosting a glass melting furnace using a roof mounted oxygen-fuel burner In an industrial glass furnace which contains recuperators, regenerators, electric boost or other devices for providing heat to glass batch material an oxy-fuel burner mounted in the roof of the furnace provides additional heat to melt the batch material.... | 07/23/2002 |
| 6418755 | Glass melting apparatus and method including exhausting the furnace atmosphere by removal of a heating element A system for melting and delivering glass to a work area such as spinners for making fiberglass includes a melter with heaters so arranged that the "hot spot" in the molten glass is located away from the walls and corrosion sensitive parts so that the var... | 07/16/2002 |
| 6289694 | Method and apparatus for melting glass in U-flame and cross-fired tank furnaces with a reduction of the Nox and Co content of the waste gases During the melting of glass from charging material in furnaces with burners and regenerators for the recovery of waste heat, oxygen and primary fuel are introduced into the area around the flame roots under slightly sub-stoichiometric conditions to cover ... | 09/18/2001 |
| 6237368 | Process for the regulating or controlling the NOx content of exhaust gases given off during the operating of glass melting furnaces with several burners run alternately A method for regulating or controlling the content of NOx in the exhaust gases of a glass-melting furnace having several burners operated in alternation, wherein both the beginning and the end of a combustion break (FP+, FP- | 05/29/2001 |
| 6047565 | Method and device for reducing the NOx emission in a glass furnace A method and apparatus involving combustion for melting glass. The fuel and oxidizer of the combustion are both supplied in such a way as to spread out the fuel/oxidant contact over time and to increase the volume of the contact. This limits the temperatu... | 04/11/2000 |
| 5954851 | Method for preheating glass batch A method and apparatus for efficiently preheating glass batch utilizing waste gas from a glass melting furnace is provided. In a method and apparatus for preheating glass batch utilizing hot waste gas discharged from a glass melting furnace before glass b... | 09/21/1999 |
| 5893940 | Reduction of NOx emissions in a glass melting furnace A method of controlling NOx emissions from a glass melting process in which combustion fuel produces exhaust gas in a melting furnace including NOx compounds is disclosed. Furnace exhaust gas passes from the melting furnace through a... | 04/13/1999 |
| 5879566 | Integrated steam reforming operation for processing organic contaminated sludges and system A method and system for processing waste dries and reforms a sludge stream of the waste with a first reformed effluent stream to produce a gas effluent stream and a solids effluent stream. The gas effluent stream is reformed further to produce the first e... | 03/09/1999 |
| 5855636 | Method which removes odor and pollutants when preparing cullet for use in an electrostatic bed filter A method for treating cullet before use as a raw material in a glass manufacturing process is disclosed. The method includes providing a bed of cullet; passing hot gases through the bed, the quantity and temperature of gases being sufficient to pyrolyze o... | 01/05/1999 |
| 5851256 | Method for reducing NOx emissions from a regenerative glass furnace A method of operating a regenerative glass furnace for melting glass for the manufacture of shaped glass articles so as to minimize emission of NOx in waste gases leaving the furnace, the furnace having sealed regenerators which act as heat exchangers, th... | 12/22/1998 |
| 5849059 | Method for reducing NOx emissions from a regenerative glass furnace A method of operating a cross-fired regenerative glass furnace for melting flat glass so as to minimize emission of NOx in waste gases leaving the furnace, the furnace having sealed regenerators which act as heat exchangers, the method including supplying... | 12/15/1998 |
| 5840094 | Air filter element; assembly; and, method A filter assembly having first and second opposite frame members and a filter element removably secured to the first and second frame members is provided. The filter element is preferably a pleated paper filter, positioned in extension between opposite en... | 11/24/1998 |
| 5837028 | Method for reducing CO emissions from a regenerative glass furnace A method of operating a cross-fired regenerative glass furnace for melting flat glass so as to minimize emission of NOx in waste gases leaving the furnace, the furnace having sealed regenerators which act as heat exchangers, the method including supplying... | 11/17/1998 |
| 5833730 | Method for reducing NOx emissions from a regenerative glass furnace A method of operating a regenerative glass furnace for melting glass for the manufacture of shaped glass articles so as to minimize emission of NOx in waste gases leaving the furnace, the furnace having sealed regenerators which act as heat exchangers, th... | 11/10/1998 |
| 5820651 | Method for reducing CO emissions from a regenerative glass furnace A method of operating a regenerative glass furnace for melting glass for the manufacture of shaped glass articles so as to minimize emission of NOx in waste gases leaving the furnace, the furnace having sealed regenerators which act as heat exchangers, th... | 10/13/1998 |
| 5810901 | Method for reducing NOx emissions from a regenerative glass furnace A method of operating a cross-fired regenerative glass furnace for melting flat glass so as to minimize emission of NOx in waste gases leaving the furnace, the furnace having sealed regenerators which act as heat exchangers, the method includes supplying ... | 09/22/1998 |
| 5807418 | Energy recovery in oxygen-fired glass melting furnaces A method for improving the energy efficiency of oxygen-fired glass melting furnaces wherein heat from hot flue gases from the melting furnace is used to heat all or part of the combustion oxidant and thereafter to preheat at least a portion of the glass f... | 09/15/1998 |
| 5795363 | Reduction of solid defects in glass due to refractory corrosion in a float glass operation The present invention provides an apparatus and method for reducing the occurrences of solid defects in float glass due to corrosion of refractory in a glass melting and refining furnace. In making flat glass by the float process, batch materials are fed ... | 08/18/1998 |
| 5795364 | Reburning glass furnace for insuring adequate mixing of gases to reduce NOx emissions A mixing method insures adequate mixing of gases in a glass furnace that employs a reburning process. Because of the mixing method, a novel glass furnace can be constructed that strikes an optimum balance between a reduction in nitrogen oxide (NOx | 08/18/1998 |
| 5779748 | Method which removes odor and pollutants when preparing cullet for use in an electrostatic bed filter A method and apparatus for treating cullet before use as a raw material in a glass manufacturing process is disclosed. The method includes providing a bed of cullet; passing hot gases through the bed, the quantity and temperature of gases being sufficient... | 07/14/1998 |
| 5743929 | Process for the production of high purity carbon dioxide Food grade carbon dioxide is produced from oxyfuel fired glassmaking furnace waste gas by a series of steps including quenching the waste gas with aqueous quench liquid, dry-filtering sulfur salt from the gas, scrubbing the filtered gas with aqueous carbo... | 04/28/1998 |
| 5741342 | Apparatus and method for preheating raw materials for glass making A method is taught for separately preheating cullet and batch, material use in glass making. This method uses a two stage process for preheating batch in a way that allows water vapor to escape to the atmosphere before the main preheating stage. It supple... | 04/21/1998 |
| 5713977 | Fixed bed filtering preheater process for high temperature process furnaces A glassmelting or particle heating system wherein hot flue gas is radiatively cooled in a gas cooling zone integrated within a preheating vessel and a fixed or non-moving bed of material is formed in a filtering zone of the preheating vessel for traverse ... | 02/03/1998 |
| 5709728 | Method and device for the production of mineral wool by using mineral wool waste as recycled starting material The melting tub for producing the molten mass from a mixture of raw material is associated with an additional melting unit by means of which a recycled molten mass is obtained from mineral wool waste largely corresponding to the molten mass obtained from ... | 01/20/1998 |
