KR880001536A - 유리질재료의 진공정제를 위한 기포조절방법 - Google Patents

유리질재료의 진공정제를 위한 기포조절방법 Download PDF

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Publication number
KR880001536A
KR880001536A KR1019870007216A KR870007216A KR880001536A KR 880001536 A KR880001536 A KR 880001536A KR 1019870007216 A KR1019870007216 A KR 1019870007216A KR 870007216 A KR870007216 A KR 870007216A KR 880001536 A KR880001536 A KR 880001536A
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South Korea
Prior art keywords
bubble
bubbles
alkali metal
refining
container
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Application number
KR1019870007216A
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English (en)
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KR900005198B1 (ko
Inventor
몬트거머리 웰턴 라이트
Original Assignee
원본미기재
피이피이지이 인더스트리이즈 인코포레이팃드
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Publication of KR880001536A publication Critical patent/KR880001536A/ko
Application granted granted Critical
Publication of KR900005198B1 publication Critical patent/KR900005198B1/ko

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    • 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
    • C03B5/12Melting 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
    • C03B3/00Charging the melting furnaces
    • C03B3/02Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
    • 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
    • C03B5/16Special 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
    • C03B5/2252Refining under reduced pressure, e.g. with vacuum refiners
    • 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
    • C03C1/00Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/004Refining agents
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57Improving the yield, e-g- reduction of reject rates

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Glass Compositions (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)
  • Thermal Insulation (AREA)

Abstract

내용 없음

Description

유리질재료의 진공정제를 위한 기포조절방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 이 발명의 바람직한 실시예에 따른 액화단계, 용해단계 및 진공정제단계를 포함하는 용융작업의 세단계들을 통한 수직단면도이다.

Claims (14)

  1. 용융상태에 있는 일정용적의 유리 재료가 용기내에 잔류되고, 상기 재료의 정제를 보조하도록 상기 용기내 상기 용융 재료위에 아대기압이 유지됨으로써 상기 용기내 상기 재료위에 기포가 나타나는, 유리질재료 등을 정제하는 방법에 있어서, 기포의 붕괴를 가속화하는 물질을 상기 기포위로 침전시키는 것을 특징으로 하는 유리질 재료정제 방법.
  2. 제1항에 있어서, 상기 기포붕괴 물질이 물, 알칼리 금속화합물 또는 알칼리 금속화합물의 용액인 것을 특징으로 하는 방법.
  3. 제2항에 있어서, 상기 알칼리 금속화합물이 나트륨화합물인 것을 특징으로 하는 방법.
  4. 제3항에 있어서, 상기 기포붕괴물질이 수산화나트륨 또는 탄산나트륨인 것을 특징으로 하는 방법.
  5. 제1항 내지 제4항중 어느 한 항에 있어서, 기포의 붕괴가 물을 기포에 뿌림으로써 가속되어지는 것을 특징으로 하는 방법.
  6. 제1항에 있어서, 상기 기포붕괴물질이 액체인 것을 특징으로 하는 방법.
  7. 제6항에 있어서, 상기 액체가 연소성이 있는 것을 특징으로 하는 방법.
  8. 제1항에 있어서, 상기 용기내의 압력이 대기압의 절반에 지나지 않는 것을 특징으로 하는 방법.
  9. 제8항에 있어서, 상기 압력이 100토로에 지나지 않는 것을 특징으로 하는 방법.
  10. 제1항에 있어서, 상기 기포붕괴물질이 기포위로 연속적으로 공급되는 것을 특징으로 하는 방법.
  11. 제1항에 있어서, 상기 기포붕괴물질이 기포위로 단속적으로 공급되는 것을 특징으로 하는 방법.
  12. 제1항에 있어서, 상기 재료가 용기로 들어가기에 앞서 액화되는 것을 특징으로 하는 방법.
  13. 제1항에 있어서, 정제되는 상기 재료가 소오다 석회 실리카 유리이고, 상기 유리에는 처음에 정제보조제로서 1000중량부의 실리카 공급물질에 대하여 2중량부의 황산나트륨에 해당하는 양보다 크지 않는 양으로 유황공급원이 제공되는 것을 특징으로 하는 방법.
  14. 제13항에 있어서, 상기 재료나 유황함유정제보조제를 일부러 함유하지 않는 것을 특징으로 하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019870007216A 1986-07-07 1987-07-06 유리질재료의 진공정제를 위한 기포조절방법 KR900005198B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88264786A 1986-07-07 1986-07-07
US882647 1986-07-07

Publications (2)

Publication Number Publication Date
KR880001536A true KR880001536A (ko) 1988-04-23
KR900005198B1 KR900005198B1 (ko) 1990-07-21

Family

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Application Number Title Priority Date Filing Date
KR1019870007216A KR900005198B1 (ko) 1986-07-07 1987-07-06 유리질재료의 진공정제를 위한 기포조절방법

Country Status (24)

Country Link
US (1) US4794860A (ko)
EP (1) EP0253188B1 (ko)
JP (1) JPS6325226A (ko)
KR (1) KR900005198B1 (ko)
CN (1) CN1007059B (ko)
AT (1) ATE44377T1 (ko)
AU (1) AU574613B2 (ko)
BR (1) BR8703392A (ko)
CA (1) CA1275572C (ko)
DE (1) DE3760295D1 (ko)
DK (1) DK164542C (ko)
EG (1) EG18519A (ko)
ES (1) ES2009822B3 (ko)
FI (1) FI82233C (ko)
GR (1) GR3000096T3 (ko)
IL (1) IL83035A (ko)
IN (1) IN171103B (ko)
MX (1) MX164857B (ko)
MY (1) MY102868A (ko)
NZ (1) NZ220810A (ko)
PH (1) PH23557A (ko)
PT (1) PT85267B (ko)
SG (1) SG90291G (ko)
ZA (1) ZA874581B (ko)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4704153A (en) * 1986-08-12 1987-11-03 Ppg Industries, Inc. Vacuum refining of glassy materials with controlled foaming
JPH01224231A (ja) * 1988-03-01 1989-09-07 Nippon Sheet Glass Co Ltd ガラスの製造方法
US4849004A (en) * 1988-10-31 1989-07-18 Ppg Industries, Inc. Pulsed pressure method for vacuum refining of glassy materials
US4886539A (en) * 1989-04-03 1989-12-12 Ppg Industries, Inc. Method of vacuum refining of glassy materials with selenium foaming agent
US5206509A (en) * 1991-12-11 1993-04-27 Martin Marietta Energy Systems, Inc. Universal collisional activation ion trap mass spectrometry
DE19822437C1 (de) 1998-05-19 1999-07-29 Schott Glas Verfahren zum physikalischen Läutern einer Flüssigkeit und Vorrichtung zur Durchführung des Verfahrens
JP3861460B2 (ja) 1998-06-26 2006-12-20 旭硝子株式会社 溶融ガラスの減圧脱泡方法
JP3119850B2 (ja) * 1999-04-21 2000-12-25 旭硝子株式会社 ガラスの溶融方法
DE10055969C1 (de) * 2000-11-11 2002-05-02 Schott Glas Verfahren und Vorrichtung zur Läuterung einer Glasschmelze
JP2002293547A (ja) * 2001-03-28 2002-10-09 Asahi Glass Co Ltd 陰極線管用ガラスの製造方法
US6722161B2 (en) 2001-05-03 2004-04-20 The Boc Group, Inc. Rapid glass melting or premelting
US6854290B2 (en) * 2001-07-18 2005-02-15 Corning Incorporated Method for controlling foam production in reduced pressure fining
US20040050106A1 (en) * 2002-08-29 2004-03-18 Murnane Rand A. Producing glass using outgassed frit
DE10304973B4 (de) * 2003-02-06 2006-08-17 Schott Ag Vorrichtungen, Regelvorrichtung und Regelverfahren für die Läuterung von Glas
DE202009018723U1 (de) * 2008-02-26 2012-11-20 Corning Inc. Läutermittel für Silikatgläser
KR101103079B1 (ko) * 2009-04-08 2012-01-06 이문태 못 제조기의 펀칭 장치
US20110011134A1 (en) * 2009-07-15 2011-01-20 Richardson Andrew P Injector for hydrogen and oxygen bubbling in glass baths
US8991215B2 (en) * 2010-06-17 2015-03-31 Johns Manville Methods and systems for controlling bubble size and bubble decay rate in foamed glass produced by a submerged combustion melter
US10322960B2 (en) 2010-06-17 2019-06-18 Johns Manville Controlling foam in apparatus downstream of a melter by adjustment of alkali oxide content in the melter
US8707740B2 (en) 2011-10-07 2014-04-29 Johns Manville Submerged combustion glass manufacturing systems and methods
US9021838B2 (en) 2010-06-17 2015-05-05 Johns Manville Systems and methods for glass manufacturing
US9032760B2 (en) 2012-07-03 2015-05-19 Johns Manville Process of using a submerged combustion melter to produce hollow glass fiber or solid glass fiber having entrained bubbles, and burners and systems to make such fibers
US8997525B2 (en) 2010-06-17 2015-04-07 Johns Manville Systems and methods for making foamed glass using submerged combustion
US20130072371A1 (en) * 2011-03-17 2013-03-21 Ppg Industries Ohio, Inc. Method of, and apparatus for, using a glass fluxing agent to reduce foam during melting of glass batch
US9533905B2 (en) 2012-10-03 2017-01-03 Johns Manville Submerged combustion melters having an extended treatment zone and methods of producing molten glass
EP2903941A4 (en) 2012-10-03 2016-06-08 Johns Manville METHOD AND SYSTEMS FOR DESTABILIZING FOAM IN A DEVICE HAVING BEEN SWITCHED DOWN UNDERWATER COMBUSTION FURNACE
US9227865B2 (en) 2012-11-29 2016-01-05 Johns Manville Methods and systems for making well-fined glass using submerged combustion
CN104692616A (zh) * 2015-02-14 2015-06-10 无锡顺鼎阿泰克科技有限公司 一种玻璃全氧窑炉除气泡工艺
US9751792B2 (en) 2015-08-12 2017-09-05 Johns Manville Post-manufacturing processes for submerged combustion burner
US10670261B2 (en) 2015-08-27 2020-06-02 Johns Manville Burner panels, submerged combustion melters, and methods
US10041666B2 (en) 2015-08-27 2018-08-07 Johns Manville Burner panels including dry-tip burners, submerged combustion melters, and methods
US9815726B2 (en) 2015-09-03 2017-11-14 Johns Manville Apparatus, systems, and methods for pre-heating feedstock to a melter using melter exhaust
US9982884B2 (en) 2015-09-15 2018-05-29 Johns Manville Methods of melting feedstock using a submerged combustion melter
US10837705B2 (en) 2015-09-16 2020-11-17 Johns Manville Change-out system for submerged combustion melting burner
US10081563B2 (en) 2015-09-23 2018-09-25 Johns Manville Systems and methods for mechanically binding loose scrap
US10144666B2 (en) 2015-10-20 2018-12-04 Johns Manville Processing organics and inorganics in a submerged combustion melter
US10246362B2 (en) 2016-06-22 2019-04-02 Johns Manville Effective discharge of exhaust from submerged combustion melters and methods
US10301208B2 (en) 2016-08-25 2019-05-28 Johns Manville Continuous flow submerged combustion melter cooling wall panels, submerged combustion melters, and methods of using same
US10196294B2 (en) 2016-09-07 2019-02-05 Johns Manville Submerged combustion melters, wall structures or panels of same, and methods of using same
US10233105B2 (en) 2016-10-14 2019-03-19 Johns Manville Submerged combustion melters and methods of feeding particulate material into such melters
US11505487B2 (en) 2017-03-16 2022-11-22 Corning Incorporated Method for decreasing bubble lifetime on a glass melt surface
CN107162386B (zh) * 2017-05-23 2020-01-14 武汉理工大学 用于生产玻璃产品的换向窑炉及复合消泡剂使用方法
CN112321135B (zh) * 2020-09-28 2022-07-26 江苏孚日玻璃科技有限公司 一种环保节能保温的玻璃窑炉及其工作方法
CN113371980A (zh) * 2021-06-21 2021-09-10 中国原子能科学研究院 卸料装置、冷坩埚熔融装置以及卸料方法

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US805139A (en) * 1904-06-13 1905-11-21 Charles W Brown Manufacture of glass.
US1598308A (en) * 1922-11-01 1926-08-31 Cole French Com Pany Method of and apparatus for fining glass
US1564235A (en) * 1923-12-05 1925-12-08 Pittsburgh Plate Glass Co Process and apparatus for melting and fining glass
GB654141A (en) * 1940-01-11 1951-06-06 Minnesota Mining & Mfg Improvements in or relating to composite or laminated sheet materials, for example sandblast stencils
US2465283A (en) * 1946-06-17 1949-03-22 Glass Fibers Inc Melting and drawing furnace
NL146923B (nl) * 1948-12-02 Mueller Co Koppeling voor een kunststofbuis.
US2781411A (en) * 1953-06-10 1957-02-12 Jenaer Glaswerk Schott & Gen Process and apparatus for purifying glass
FR1101090A (fr) * 1953-06-11 1955-09-27 Jenaer Glaswerk Schott & Gen Affinage du verre
NL124733C (ko) * 1962-01-29
GB1103329A (en) * 1964-09-15 1968-02-14 Gen Trustee Co Ltd Refining of silicon
US3350185A (en) * 1965-01-18 1967-10-31 Owens Illinois Inc Method of eliminating a foam blanket on the surface of molten glass
US3338694A (en) * 1965-02-26 1967-08-29 John R Davy Manufacture calcium aluminate optical glass
FR1485634A (fr) * 1966-04-19 1967-06-23 Boussois Souchon Neuvesel Sa Procédé et dispositif pour la fusion du verre et l'élaboration de produits vitreux
AU452856B2 (en) * 1972-06-16 1974-09-19 Aci Operations Pty. Limited Glass colour changes
SU530000A1 (ru) * 1974-04-08 1976-09-30 Константиновский Ордена Трудового Красного Знамени Завод "Автостекло" Способ десульфидизации расплава шлакового стекла
US4195982A (en) * 1978-12-26 1980-04-01 Western Electric Company, Incorporated Method for extruding articles
US4339254A (en) * 1980-06-06 1982-07-13 Ball Corporation Glass manufacture employing a silicon carbide refining agent
US4381934A (en) * 1981-07-30 1983-05-03 Ppg Industries, Inc. Glass batch liquefaction
US4529428A (en) * 1983-11-25 1985-07-16 Ppg Industries, Inc. Method and apparatus for feeding an ablation liquefaction process
US4551161A (en) * 1984-06-27 1985-11-05 Ppg Industries, Inc. Organic wetting of glass batch
US4738938A (en) * 1986-01-02 1988-04-19 Ppg Industries, Inc. Melting and vacuum refining of glass or the like and composition of sheet

Also Published As

Publication number Publication date
ES2009822B3 (es) 1989-10-16
SG90291G (en) 1991-11-22
DE3760295D1 (en) 1989-08-10
CN87105721A (zh) 1988-06-01
GR3000096T3 (en) 1990-11-29
DK164542B (da) 1992-07-13
PT85267A (pt) 1988-07-29
IL83035A0 (en) 1987-12-20
MY102868A (en) 1993-03-31
MX164857B (es) 1992-09-29
JPH02299B2 (ko) 1990-01-05
PH23557A (en) 1989-08-25
DK345687D0 (da) 1987-07-06
CA1275572C (en) 1990-10-30
PT85267B (pt) 1993-07-30
JPS6325226A (ja) 1988-02-02
FI872981A (fi) 1988-01-08
EP0253188B1 (en) 1989-07-05
DK345687A (da) 1988-01-08
IN171103B (ko) 1992-07-18
ATE44377T1 (de) 1989-07-15
FI82233B (fi) 1990-10-31
AU7503687A (en) 1988-01-14
EG18519A (en) 1993-07-30
US4794860A (en) 1989-01-03
CN1007059B (zh) 1990-03-07
FI82233C (fi) 1991-02-11
AU574613B2 (en) 1988-07-07
IL83035A (en) 1995-08-31
FI872981A0 (fi) 1987-07-06
DK164542C (da) 1992-11-30
NZ220810A (en) 1989-08-29
KR900005198B1 (ko) 1990-07-21
ZA874581B (en) 1989-05-30
BR8703392A (pt) 1988-03-22
EP0253188A1 (en) 1988-01-20

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