EG24956A - Furnace for the preparation of glass compositions comprising a low level of non melted particulates. - Google Patents

Furnace for the preparation of glass compositions comprising a low level of non melted particulates.

Info

Publication number
EG24956A
EG24956A EG2003080747A EG2003080747A EG24956A EG 24956 A EG24956 A EG 24956A EG 2003080747 A EG2003080747 A EG 2003080747A EG 2003080747 A EG2003080747 A EG 2003080747A EG 24956 A EG24956 A EG 24956A
Authority
EG
Egypt
Prior art keywords
furnace
silica
particulates
preparation
low level
Prior art date
Application number
EG2003080747A
Other languages
English (en)
Inventor
Remi Jacques
Pierre Jeanvoine
Biagio Palmieri
Original Assignee
Saint Gobain
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain filed Critical Saint Gobain
Application granted granted Critical
Publication of EG24956A publication Critical patent/EG24956A/xx

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/027Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
    • C03B5/03Tank furnaces
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/04Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/12Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in shaft furnaces
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/173Apparatus for changing the composition of the molten glass in glass furnaces, e.g. for colouring the molten glass
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/18Stirring devices; Homogenisation
    • C03B5/183Stirring devices; Homogenisation using thermal means, e.g. for creating convection currents
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/18Stirring devices; Homogenisation
    • C03B5/193Stirring devices; Homogenisation using gas, e.g. bubblers
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/20Bridges, shoes, throats, or other devices for withholding dirt, foam, or batch
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/225Refining
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/235Heating the glass
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/235Heating the glass
    • C03B5/2356Submerged heating, e.g. by using heat pipes, hot gas or submerged combustion burners
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/44Cooling arrangements for furnace walls
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/078Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2211/00Heating processes for glass melting in glass melting furnaces
    • C03B2211/20Submerged gas heating
    • C03B2211/22Submerged gas heating by direct combustion in the melt
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2211/00Heating processes for glass melting in glass melting furnaces
    • C03B2211/70Skull melting, i.e. melting or refining in cooled wall crucibles or within solidified glass crust, e.g. in continuous walled vessels

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • Glass Compositions (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Table Devices Or Equipment (AREA)
EG2003080747A 2002-07-31 2003-08-02 Furnace for the preparation of glass compositions comprising a low level of non melted particulates. EG24956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0209728A FR2843107B1 (fr) 2002-07-31 2002-07-31 Four a cuves en serie pour la preparation de composition de verre a faible taux d'infondus

Publications (1)

Publication Number Publication Date
EG24956A true EG24956A (en) 2011-02-21

Family

ID=30129574

Family Applications (1)

Application Number Title Priority Date Filing Date
EG2003080747A EG24956A (en) 2002-07-31 2003-08-02 Furnace for the preparation of glass compositions comprising a low level of non melted particulates.

Country Status (14)

Country Link
US (1) US8196432B2 (de)
EP (1) EP1527023B1 (de)
JP (2) JP4594089B2 (de)
KR (1) KR101059494B1 (de)
CN (2) CN100337950C (de)
AT (1) ATE535501T1 (de)
AU (1) AU2003274207A1 (de)
BR (1) BR0312930B1 (de)
EG (1) EG24956A (de)
ES (1) ES2378308T3 (de)
FR (1) FR2843107B1 (de)
MX (1) MXPA05001226A (de)
PT (1) PT1527023E (de)
WO (1) WO2004013056A1 (de)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866328B1 (fr) * 2004-02-16 2006-05-26 Saint Gobain Verre plat au plomb par flottage sur un bain de metal
FR2873681A1 (fr) * 2004-07-28 2006-02-03 Saint Gobain Procede et four a cuves en serie pour la preparation de frittes de verre
US7454925B2 (en) * 2005-12-29 2008-11-25 Corning Incorporated Method of forming a glass melt
CN102803163B (zh) * 2009-06-12 2015-11-25 气体产品与化学公司 用于控制熔融材料氧化状态的熔炉和方法
FR2991759B1 (fr) * 2012-06-12 2014-06-20 Saint Gobain Isover Installation de fusion de verre
GB201313654D0 (en) 2013-07-31 2013-09-11 Knauf Insulation Doo Skofja Loka Melting of vitrifiable material
GB201313653D0 (en) * 2013-07-31 2013-09-11 Knauf Insulation Doo Skofja Loka Melting of vitrifiable material
GB201313651D0 (en) 2013-07-31 2013-09-11 Knauf Insulation Doo Skofja Loka Melting of vitrifiable material
GB201313656D0 (en) 2013-07-31 2013-09-11 Knauf Insulation Doo Skofja Loka Melting of vitrifiable material
GB201313652D0 (en) 2013-07-31 2013-09-11 Knauf Insulation Doo Skofja Loka Melting of vitrifiable material
MX369215B (es) 2014-05-15 2019-10-30 Colorobbia Mexico S A De C V Horno de combustión sumergida para producción de frita y método de producción de frita.
US10604437B2 (en) 2014-10-20 2020-03-31 Navus Automation, Inc. Fused silica furnace system and method for continuous production of fused silica
US10570045B2 (en) * 2015-05-22 2020-02-25 John Hart Miller Glass and other material melting systems
TW201711967A (zh) * 2015-08-26 2017-04-01 美商.康寧公司 用於增進的均質性之玻璃熔融系統及方法
WO2018026775A1 (en) * 2016-08-02 2018-02-08 Corning Incorporated Methods for melting reactive glasses and glass-ceramics and melting apparatus for the same
KR102523494B1 (ko) * 2017-06-28 2023-04-20 코닝 인코포레이티드 유리 형성 장치들을 위한 멜터들
US10807896B2 (en) 2018-03-15 2020-10-20 Owens-Brockway Glass Container Inc. Process and apparatus for glass manufacture
US11427492B2 (en) * 2019-07-11 2022-08-30 Owens-Brockway Glass Container Inc. Multi-chamber submerged combustion melter and system
US11440829B2 (en) * 2019-10-01 2022-09-13 Owens-Brockway Glass Container Inc. Utilization of sulfate in the fining of submerged combustion melted glass
US11697608B2 (en) 2019-10-01 2023-07-11 Owens-Brockway Glass Container Inc. Selective chemical fining of small bubbles in glass
US11912608B2 (en) 2019-10-01 2024-02-27 Owens-Brockway Glass Container Inc. Glass manufacturing
US11680005B2 (en) 2020-02-12 2023-06-20 Owens-Brockway Glass Container Inc. Feed material for producing flint glass using submerged combustion melting
US11319235B2 (en) 2019-10-01 2022-05-03 Owens-Brockway Glass Container Inc. Glass manufacturing process
US11459263B2 (en) * 2019-10-01 2022-10-04 Owens-Brockway Glass Container Inc. Selective chemical fining of small bubbles in glass
US12428330B2 (en) 2020-02-12 2025-09-30 Owens-Brockway Glass Container Inc. Producing flint glass using submerged combustion melting
FR3109810B1 (fr) * 2020-04-30 2022-09-09 Saint Gobain Isover Four à fort rendement énergétique

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1596058A (en) * 1923-02-07 1926-08-17 Libbey Owens Sheet Glass Co Glass-melting furnace
US2492523A (en) * 1948-01-20 1949-12-27 Metal & Thermit Corp Acid resistant enamel frit and ferrous metal coated with enamel made from same
US2923636A (en) * 1959-04-06 1960-02-02 Owens Illinois Glass Co Glass-making frit and method
US3170781A (en) * 1959-11-18 1965-02-23 Owens Illinois Glass Co Apparatus for feeding gaseous materials to glass melting furnaces
NL260066A (de) * 1960-01-14
US3203816A (en) * 1960-09-13 1965-08-31 Owens Illinois Glass Co Glass making batch and method
NL124733C (de) * 1962-01-29
US3244495A (en) * 1962-07-02 1966-04-05 Bausch & Lomb Regulated flow glass melting furnace
GB1028482A (en) * 1964-04-27 1966-05-04 Selas Corp Of America Improvements in or relating to a burner for glass melting apparatus
FR2032193A5 (de) * 1969-02-21 1970-11-20 Saint Gobain
US3627504A (en) * 1969-12-29 1971-12-14 Glass Container Ind Res Method of adding colorant to molten glass
CH558761A (de) * 1970-04-01 1975-02-14 Eirich Wilhelm Verfahren zur herstellung eines granulierten schmelzfaehigen glasgemenges.
DE2621741C3 (de) * 1976-05-15 1979-06-28 Jenaer Glaswerk Schott & Gen., 6500 Mainz Cadmiumhaltige Gläser für Filter mit Absorptionsteilkanten im Wellenlängenbereich &lgr
US4358304A (en) * 1977-02-02 1982-11-09 Owens-Corning Fiberglas Corporation Method for preparing molten glass
US4199364A (en) * 1978-11-06 1980-04-22 Ppg Industries, Inc. Glass composition
US4312951A (en) * 1979-09-07 1982-01-26 Mobay Chemical Corporation Low-melting, lead-free ceramic frits
FI77439C (fi) * 1981-04-15 1989-03-10 Riihimaeen Lasi Oy Foerfarande foer opalisering av glas.
JPS6031772B2 (ja) * 1982-05-17 1985-07-24 工業技術院長 ガラス溶融炉
GB8331031D0 (en) * 1983-11-21 1983-12-29 Roberts D Vitrification of asbestos waste
US4632687A (en) * 1985-06-25 1986-12-30 Ppg Industries, Inc. Method of melting raw materials for glass or the like using solid fuels or fuel-batch mixtures
JPS63285136A (ja) * 1987-05-19 1988-11-22 Toyo Glass Kk 濃色緑色ガラス製造用フリット
US4877449A (en) * 1987-07-22 1989-10-31 Institute Of Gas Technology Vertical shaft melting furnace and method of melting
US4994099A (en) * 1989-04-17 1991-02-19 Corning Glass Works Method for fining molten glass
US5630860A (en) * 1993-06-15 1997-05-20 Beteiligungen Sorg Gmbh & Co. Kg Method and apparatus for conditioning and homogenizing a glass stream
AT401301B (de) * 1993-07-01 1996-08-26 Holderbank Financ Glarus Reaktor sowie verfahren zum schmelzen von verbrennungsrückständen
DE4418726A1 (de) 1994-05-28 1995-11-30 Gruenzweig & Hartmann Glasfaserzusammensetzungen
CN1051806C (zh) * 1996-04-17 2000-04-26 王明玉 微细粒浸染型原生金矿选冶工艺及设备
DE19617344C1 (de) * 1996-04-30 1997-08-07 Schott Glaswerke Alkalifreies Aluminoborosilicatglas und seine Verwendung
FR2757150B1 (fr) 1996-12-12 1999-01-22 Saint Gobain Vitrage Procede d'emaillage de substrats en verre, composition d'email utilisee et produits obtenus
CZ297579B6 (cs) * 1998-01-09 2007-02-07 Saint-Gobain Vitrage Zpusob a zarízení pro tavení a cerení zeskelnovatelných materiálu
EP1067099B1 (de) * 1999-07-05 2001-12-05 Ferro Corporation Kristallisierendes Glasurkomponentensystem
FR2796063B1 (fr) 1999-07-08 2001-08-17 Saint Gobain Vitrage Nouvelle composition d'email noir, recyclable, comprenant du zinc, procede de fabrication et produits emailles obtenus

Also Published As

Publication number Publication date
JP2005534601A (ja) 2005-11-17
AU2003274207A1 (en) 2004-02-23
FR2843107B1 (fr) 2005-06-17
BR0312930A (pt) 2005-07-12
JP5102336B2 (ja) 2012-12-19
CN1671631A (zh) 2005-09-21
FR2843107A1 (fr) 2004-02-06
BR0312930B1 (pt) 2011-11-01
US20060105899A1 (en) 2006-05-18
CN100337950C (zh) 2007-09-19
ATE535501T1 (de) 2011-12-15
JP4594089B2 (ja) 2010-12-08
CN101041545A (zh) 2007-09-26
ES2378308T3 (es) 2012-04-11
EP1527023A1 (de) 2005-05-04
WO2004013056A1 (fr) 2004-02-12
KR101059494B1 (ko) 2011-08-25
JP2010229033A (ja) 2010-10-14
EP1527023B1 (de) 2011-11-30
KR20050026045A (ko) 2005-03-14
PT1527023E (pt) 2012-03-09
CN101041545B (zh) 2011-07-06
US8196432B2 (en) 2012-06-12
MXPA05001226A (es) 2005-06-08

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