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WO2007108324A1 - Procede de fusion du verre et fourneau de fusion du verre - Google Patents

Procede de fusion du verre et fourneau de fusion du verre Download PDF

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Publication number
WO2007108324A1
WO2007108324A1 PCT/JP2007/054424 JP2007054424W WO2007108324A1 WO 2007108324 A1 WO2007108324 A1 WO 2007108324A1 JP 2007054424 W JP2007054424 W JP 2007054424W WO 2007108324 A1 WO2007108324 A1 WO 2007108324A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
melting
tank
molten glass
adjustment tank
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2007/054424
Other languages
English (en)
Japanese (ja)
Inventor
Kimio Iino
Shinji Murakami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ohara Inc
Nippon Sanso Holdings Corp
Original Assignee
Ohara Inc
Nippon Sanso Holdings Corp
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 Ohara Inc, Nippon Sanso Holdings Corp filed Critical Ohara Inc
Priority to JP2008506229A priority Critical patent/JP5231211B2/ja
Priority to CN2007800090167A priority patent/CN101400612B/zh
Publication of WO2007108324A1 publication Critical patent/WO2007108324A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/235—Heating the glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/04—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/235—Heating the glass
    • C03B5/2353—Heating the glass by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping

Definitions

  • the present invention relates to a glass melting method and a glass melting furnace for efficiently manufacturing a glass product in the manufacture of a glass product using oxyfuel combustion.
  • Patent Documents 1 to 3 In recent years, in a glass melting furnace for industrially producing glass, oxygen combustion has been increasingly used for glass of a type that requires high-temperature melting (Patent Documents 1 to 3). .
  • oxyfuel combustion is often employed because air combustion has low thermal efficiency.
  • Patent Document 4 discloses a method of adjusting the moisture concentration in a gas in a glass melting furnace. The purpose of this method is to install a humidifier outside the secondary air so that the air supplied to the melting furnace is humidified and maintained at a constant humidity to prevent temperature fluctuations in the melting furnace. This method increases the water vapor concentration in air combustion. On the other hand, in oxygen combustion, water is generated more than three times as much as in air combustion, so the method described in Patent Document 4 adjusts the moisture concentration in glass by adjusting the moisture concentration in the gas as described above. Can not do.
  • Patent Document 1 JP-A-6-24752
  • Patent Document 2 JP-A-10-316434
  • Patent Document 3 Japanese Patent Laid-Open No. 11_11954
  • Patent Document 4 JP-A-8_268724
  • An object of the present invention is to provide a glass melting method and a glass melting furnace capable of adjusting the moisture concentration in the glass even when the oxygen combustion method is used as a glass melting heat source in the glass melting furnace. There is to do.
  • the present invention is a glass melting method using a glass melting furnace provided with a melting tank, wherein an adjusting tank is disposed downstream of the molten glass flow in the melting tank, and the adjusting tank Glass melting method that adjusts the moisture concentration in the molten glass by controlling the equilibrium state of the moisture concentration at the interface between the atmospheric gas and the molten glass surface by adjusting the temperature of the gas and the amount of gas introduced into the adjustment tank I will provide a.
  • the present invention since the effect is particularly great when the raw glass is melted using an oxygen burner, the present invention is applied when the raw glass is melted using an oxygen burner in the melting tank. Is preferred. Further, in order to appropriately adjust the water concentration in the molten glass, it is preferable to keep the pressure in the adjustment tank at a positive pressure.
  • the present invention is a glass melting furnace for melting a raw glass as a glass melting furnace for carrying out the glass melting method, the melting tank and the moisture of the glass melted in the melting tank
  • An adjustment tank for adjusting the concentration, a throat part for flowing molten glass to the melting tank force adjustment tank, and a partition wall for isolating the upper space of the melting tank and the upper space of the adjustment tank
  • the adjustment tank provides a glass melting furnace provided with a partition weir provided downstream of the molten glass flow from the partition wall, a molten glass heating means for adjusting the molten glass temperature, and an atmospheric gas inlet. .
  • the present invention is particularly effective in a melting furnace equipped with an oxygen burner. Therefore, it is preferable to apply the present invention in a melting furnace in which the melting tank includes an oxygen burner.
  • the molten glass heating means is preferably a submerged electrode and / or an electric heater.
  • the adjustment tank is provided with an atmospheric gas heating means for adjusting the temperature of the atmospheric gas.
  • the atmospheric gas heating means is preferably an electric heater.
  • the adjustment tank is provided downstream of the molten glass flow in the melting tank to adjust the water concentration in the molten glass. Therefore, the oxygen combustion method is used as the glass melting heat source. In addition, the water concentration in the molten glass can be properly managed.
  • FIG. 1 is a cross-sectional view of a glass melting furnace for carrying out the present invention.
  • FIG. 1 is a cross-sectional view schematically showing a melting furnace suitable for carrying out the present invention.
  • the melting furnace 1 has a melting tank 2 and a regulating tank 3.
  • the upper space of the melting tank 2 and the adjustment tank 3 is isolated by a partition wall 4.
  • the raw material glass 22 in the raw material hopper 20 is put into the melting tank 2 by the raw material feeder 21.
  • the raw glass 22 is melted by a plurality of oxygen analyzers 8, 8... Installed in the melting tank 2, and sequentially becomes a molten glass 23.
  • the molten glass 23 is introduced into the adjustment tank 3 through the slot portion 5 below the partition wall 4.
  • the adjustment tank 3 is provided with a partition weir 6, and the molten glass 23 overflows the partition weir 6 and is stored in the adjustment bath 7. original The charge is supplied until the amount of accumulated glass in the adjustment bath 7 reaches a predetermined level.
  • an atmospheric gas inlet 10 for adjusting the moisture concentration in the gas phase is provided in the upper space of the adjustment tank 3.
  • the atmosphere gas is introduced into the glass at the surface of the molten glass 23 surface.
  • the diffusion of moisture into the atmospheric gas is developed, and the moisture concentration in the glass is lowered.
  • a melting tank exhaust gas port 9 and an adjustment tank exhaust gas port 24 for leading out excess exhaust gas are provided, respectively.
  • adjustment tank 3 in order to perform heat compensation of molten glass 23, it is preferable to provide a molten glass heating means. Specifically, heat compensation is performed by installing an electric heater 11 in the upper space of the adjustment tank 3, or by providing an immersion electrode 12 in the molten glass 23 and performing Joule heating.
  • the electrode 12 is preferably made of platinum so as not to be eroded by the molten glass 23, but it is also possible to use molybdenum depending on the glass component.
  • the adjustment tank 3 is preferably provided with an atmospheric gas heating means for adjusting the temperature of the atmospheric gas. Specifically, the electric heater 11 is mentioned.
  • Forcible stirring of the molten glass also enhances the moisture concentration adjustment effect.
  • a gas stirrer (not shown) is provided in the molten glass 23, or gas bubbling is performed by introducing a gas publishing gas from the gas publishing port 13.
  • the moisture concentration of the gas bubbling gas is lower than the moisture concentration in the molten glass 23, similarly to the atmospheric gas.
  • the atmosphere gas and gas publishing gas introduced into the adjustment tank 3 should be preheated by heat exchange with the combustion exhaust gas discharged from the melting tank 2. Heat exchange can reduce energy consumption.
  • the residence time of the molten glass 23 in the adjustment bath 7 varies depending on the type of glass and the amount of melting. Therefore, the volume of the adjustment bath 7 should be determined so as to ensure an appropriate residence time.
  • the molten glass 23 in the adjustment bath 7 is allowed to flow out from the glass outlet 14 installed at the bottom or bottom of the adjustment bath 7 until the predetermined level is reached. Send to the next process. After the molten glass 23 flows out, the glass outlet 14 is closed again, and the raw glass 22 is put into the melting tank 2 again to start melting the glass. By repeating this operation, it is possible to produce a glass whose moisture concentration is properly controlled.
  • a melting test of soda-lime glass was performed.
  • the raw glass 22 started to melt from the state where 50% of the molten glass 23 was stored in the adjustment bath 7, and the molten glass 23 was stored until a predetermined amount was obtained over 24 hours. During this time, for the purpose of heat compensation, the atmospheric gas temperature was adjusted by the electric heater 11 in the upper space and Joule heating was performed by the immersion type platinum electrode.
  • a dry nitrogen gas preheated by heat exchange with the combustion exhaust gas from the melting tank 2 was used.
  • the preheating temperature was about 300 ° C.
  • a restriction was provided at the exhaust gas port 24 for the adjustment tank so that the inside of the adjustment tank 3 was always kept at a positive pressure to prevent air from entering through the exhaust gas port 9 for the melting tank.
  • the amount of molten glass 23 in the adjustment bath 7 was reduced to 50 from the glass outlet 14. It was allowed to flow out until it reached%, and the glass was molded.
  • the water concentration of the sample obtained in the first step was 400 to 500 ppm.
  • the first process was excluded from the evaluation because it may be affected by the unsteady state up to 50% accumulation in adjustment tank 3.
  • Table 1 shows the results of moisture measurements for the second sample 2 (a) to 2 (c) and the sample 3 (a) to 3 (c) obtained in the third step.
  • the moisture content of the samples all decreased to around 200 ppm, that is, below 220 ppm, indicating that there was no need to adjust the moisture after the melting process.
  • the water concentration in the molten glass 23 can be properly managed, so that it is not necessary to adjust the moisture at the latter stage of the melting process. Therefore, it is industrially useful.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un procédé de fusion du verre, selon lequel un fourneau de fusion du verre ayant une cuve de fusion est utilisé, une cuve d'ajustement étant disposée en aval d'un écoulement de verre en fusion dans la cuve de fusion, l'état d'équilibre de la concentration en eau à une interface entre un gaz ambiant et une surface de verre en fusion étant modulé en ajustant la température de la cuve d'ajustement et une qualité d'un gaz à introduire dans la cuve d'ajustement.
PCT/JP2007/054424 2006-03-16 2007-03-07 Procede de fusion du verre et fourneau de fusion du verre Ceased WO2007108324A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2008506229A JP5231211B2 (ja) 2006-03-16 2007-03-07 ガラス溶融方法およびガラス溶融炉
CN2007800090167A CN101400612B (zh) 2006-03-16 2007-03-07 玻璃熔融方法及玻璃熔炉

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006072235 2006-03-16
JP2006-072235 2006-03-16

Publications (1)

Publication Number Publication Date
WO2007108324A1 true WO2007108324A1 (fr) 2007-09-27

Family

ID=38522357

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/054424 Ceased WO2007108324A1 (fr) 2006-03-16 2007-03-07 Procede de fusion du verre et fourneau de fusion du verre

Country Status (4)

Country Link
JP (1) JP5231211B2 (fr)
CN (1) CN101400612B (fr)
MY (1) MY177056A (fr)
WO (1) WO2007108324A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013011837A1 (fr) * 2011-07-15 2013-01-24 日東紡績株式会社 Dispositif de fusion de verre, dispositif de production d'une fibre de verre et procédé de production d'une fibre de verre
WO2019124006A1 (fr) * 2017-12-22 2019-06-27 日本電気硝子株式会社 Procédé de production d'article en verre et four de fusion de verre

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103443039B (zh) * 2011-03-23 2015-08-26 旭硝子株式会社 浮法玻璃及其制造方法
JP6675588B2 (ja) * 2016-11-15 2020-04-01 日本電気硝子株式会社 ガラス物品の製造装置及びその製造方法
CN107487983B (zh) * 2017-09-08 2023-07-25 深圳凯盛科技工程有限公司 一种用于电子显示玻璃熔窑的鼓泡装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001515453A (ja) * 1998-01-09 2001-09-18 サン−ゴバン ビトラージュ ガラス化可能物質の溶融及び清澄方法
JP2004091307A (ja) * 2002-07-10 2004-03-25 Nippon Electric Glass Co Ltd ガラス製造方法
WO2004092086A2 (fr) * 2003-04-15 2004-10-28 Praxair Technology, Inc. Affinage de verres fondus utilisant des bulles d'helium
JP2005154259A (ja) * 2003-10-27 2005-06-16 Nippon Electric Glass Co Ltd ガラス組成物及びその製造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2711981B1 (fr) * 1993-11-02 1996-01-05 Saint Gobain Vitrage Dispositif pour la fusion du verre.
CN1636907A (zh) * 2004-12-02 2005-07-13 中国科学院上海光学精密机械研究所 碲酸盐玻璃及其制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001515453A (ja) * 1998-01-09 2001-09-18 サン−ゴバン ビトラージュ ガラス化可能物質の溶融及び清澄方法
JP2004091307A (ja) * 2002-07-10 2004-03-25 Nippon Electric Glass Co Ltd ガラス製造方法
WO2004092086A2 (fr) * 2003-04-15 2004-10-28 Praxair Technology, Inc. Affinage de verres fondus utilisant des bulles d'helium
JP2005154259A (ja) * 2003-10-27 2005-06-16 Nippon Electric Glass Co Ltd ガラス組成物及びその製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013011837A1 (fr) * 2011-07-15 2013-01-24 日東紡績株式会社 Dispositif de fusion de verre, dispositif de production d'une fibre de verre et procédé de production d'une fibre de verre
JPWO2013011837A1 (ja) * 2011-07-15 2015-02-23 日東紡績株式会社 ガラス溶融装置、ガラス繊維製造装置及びガラス繊維製造方法
WO2019124006A1 (fr) * 2017-12-22 2019-06-27 日本電気硝子株式会社 Procédé de production d'article en verre et four de fusion de verre
US20200331789A1 (en) * 2017-12-22 2020-10-22 Nippon Electric Glass Co., Ltd. Method for producing glass article and glass-melting furnace

Also Published As

Publication number Publication date
JPWO2007108324A1 (ja) 2009-08-06
CN101400612B (zh) 2013-06-26
JP5231211B2 (ja) 2013-07-10
MY177056A (en) 2020-09-03
CN101400612A (zh) 2009-04-01

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