WO2010098328A1 - Dispositif destiné à mélanger du verre fondu - Google Patents

Dispositif destiné à mélanger du verre fondu Download PDF

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Publication number
WO2010098328A1
WO2010098328A1 PCT/JP2010/052790 JP2010052790W WO2010098328A1 WO 2010098328 A1 WO2010098328 A1 WO 2010098328A1 JP 2010052790 W JP2010052790 W JP 2010052790W WO 2010098328 A1 WO2010098328 A1 WO 2010098328A1
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WO
WIPO (PCT)
Prior art keywords
glass
molten glass
stirring
molten
stirring blade
Prior art date
Application number
PCT/JP2010/052790
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English (en)
Japanese (ja)
Inventor
悠介 鈴木
元之 広瀬
兼士 山田
Original Assignee
旭硝子株式会社
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 旭硝子株式会社 filed Critical 旭硝子株式会社
Priority to JP2011501606A priority Critical patent/JP5510446B2/ja
Priority to CN201080006093.9A priority patent/CN102300819B/zh
Publication of WO2010098328A1 publication Critical patent/WO2010098328A1/fr

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    • 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
    • C03B5/18—Stirring devices; Homogenisation
    • C03B5/187—Stirring devices; Homogenisation with moving elements
    • C03B5/1875—Stirring devices; Homogenisation with moving elements of the screw or pump-action type
    • 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
    • C03B5/18—Stirring devices; Homogenisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0723—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis oblique with respect to the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1124—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades rake-shaped or grid-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • B01F27/1132—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller with guiding tubes or tubular segments fixed to and surrounding the tips of the propeller blades, e.g. for supplementary mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/50—Pipe mixers, i.e. mixers wherein the materials to be mixed flow continuously through pipes, e.g. column mixers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
    • 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
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the present invention stirs molten glass in a molten glass conveying tube for conveying molten glass, particularly in a molten glass conveying tube having a high molten glass conveying amount, such as a plate glass manufacturing apparatus for a large flat panel display (FPD).
  • the present invention relates to a molten glass stirring device.
  • a stirring device is attached to a molten glass conveying tube for conveying the molten glass to stir the molten glass.
  • the homogeneity of the molten glass greatly affects the transparency and thickness of the produced glass.
  • the stirrer is generally composed of a stirrer having a central axis serving as a center of rotation and a stirring blade attached around the central axis.
  • Patent Document 1 a plurality of convex portions are arranged on the outermost side of the stirring blade for narrowing the interval between the wall surface and the stirring blade for the purpose of reducing molten glass that passes through the wall surface of the flow path without stirring.
  • a stirrer has been proposed. However, this stirrer is still poor in prevention of slipping near the wall surface of the flow path, and slipping easily occurs around the central axis of the stirrer, so that the stirring effect of the molten glass cannot be said to be sufficient.
  • the stirrer disclosed in Patent Document 2 has a long stirring blade and a short stirring blade with different rotation radii as the stirring blades attached around the central axis for the purpose of improving the homogeneity of the molten glass. And mounting two or more short stirring blades alternately.
  • this stirring device it cannot be said that the effect of preventing slipping around the wall surface of the flow path or around the central axis of the stirring device is sufficient.
  • a means for stirring the molten glass for the purpose of improving the homogeneity there is also a molten glass stirring blade described in Patent Document 3 described later.
  • Japanese Unexamined Patent Publication No. 2001-72426 Japanese Unexamined Patent Publication No. 2003-63829 Japanese Unexamined Patent Publication No. 10-265226
  • glass substrates for large FPDs in particular have not been mixed with unmelted raw materials, are required to have high transparency and high flatness, and high uniformity glass with few defects has been demanded.
  • high homogeneity is also required for glass for applications requiring high transparency such as optical lenses, optical communication fibers, optical filters, solar cell substrates, and fluorescent tubes.
  • the present invention prevents the molten glass from slipping through the stirring device, more specifically, preventing the molten glass from slipping through the vicinity of the wall surface of the conveying tube and around the central axis of the stirring device.
  • An object of the present invention is to provide a glass stirrer that can be used and that is excellent in the stirring action of molten glass in a molten glass conveying tube.
  • the present invention achieves the above-mentioned purpose by providing a molten glass having a viscosity of 100 to 7000 dPa ⁇ s in a molten glass conveying tube that conveys the molten glass at a conveying amount of 1 to 50 m 3 / hour ⁇ S (S is a sectional area of the conveying tube).
  • a molten glass agitating device for agitating molten glass comprising a rotatable central axis and an agitating portion provided on the central axis, each agitating portion being a plate-like body
  • the horizontal agitating blade is provided with a long side perpendicular to the central axis and a short side inclined by 10 to 70 degrees in the axial direction of the central axis.
  • the vertical agitating blade is provided at a position where the long side is parallel to the central axis and defines the outer edge of the agitating part, and the diameter of the molten glass conveyance tube at the site where the agitating part is installed is D 1 ( mm), the maximum diameter of the outer edge of the agitating portion D 2 and (mm) Rutoki provides molten glass stirring device satisfying 0.8 ⁇ D 1 ⁇ D 2 ⁇ 0.98 ⁇ D 1.
  • the present invention also relates to a glass melting apparatus, a sheet glass forming apparatus, and a sheet glass manufacturing apparatus having a molten glass conveying tube provided between the glass melting apparatus and the sheet glass forming apparatus, the molten glass conveying tube.
  • a plate glass manufacturing apparatus provided with at least one molten glass stirring device of the present invention described above is provided.
  • the present invention also provides a molten glass stirring method using the molten glass stirring device of the present invention.
  • this invention provides the plate glass manufacturing method using the plate glass manufacturing apparatus of this invention.
  • the glass stirrer of the present invention can prevent the molten glass from slipping through the stirrer, more specifically, the molten glass can be prevented from slipping near the wall surface of the molten glass transport tube and around the central axis of the stirrer,
  • the molten glass is excellent in the stirring action of the molten glass in the molten glass conveying tube, and is excellent in the homogeneity of the molten glass after stirring, so that it is particularly suitable for a large FPD glass substrate (for example, one side of 2 m or more). Glass with high homogeneity can be obtained. As a result, there is no mixture of unmelted raw materials, and glass with high transparency and high flatness can be obtained.
  • the glass stirring device of the present invention is excellent in the homogeneity of the molten glass after stirring, high transparency such as optical lenses, optical communication fibers, optical filters, solar cell substrates, fluorescent tubes is required. It is also suitable as a molten glass stirrer for a glass production apparatus for the intended use.
  • FIG. 1 is a schematic diagram of a molten glass conveyance tube used in Example 1.
  • FIG. 1 The side view of the glass stirring apparatus of the comparative example 1.
  • FIG. 2 The perspective view of the glass stirring apparatus of the comparative example 2.
  • FIG. 3 is a schematic diagram illustrating the behavior of a fluid in a molten glass conveyance tube in the first embodiment.
  • the size of glass substrates for FPD has been increasing year by year, and the demand for such glass substrates has been increasingly demanded due to an increase in demand.
  • facilities for manufacturing plate glass for FPD an increase in the transport amount of molten glass is required.
  • facilities for producing glass for applications such as optical lenses, optical communication fibers, optical filters, solar cell substrates, and fluorescent tubes, an increase in the transport amount of molten glass is also required.
  • the glass stirrer of the present invention is preferably used by being installed in such a molten glass conveyance tube having a high conveyance amount of molten glass.
  • the viscosity is 100 to 7000 dPa ⁇ s, preferably the viscosity is 200 to 6000 dPa. ⁇
  • FIG. 1 is a perspective view showing a part of the glass stirring device of the present invention
  • FIG. 2 is a plan view of the glass stirring device
  • FIG. 3 is a side view of the glass stirring device.
  • the glass stirring device 1 shown in FIGS. 1 to 3 has a rotatable central shaft 10, and a stirring portion 20 is provided at the lower end of the central shaft 10.
  • the stirring unit 20 includes a vertical stirring blade 30 and a horizontal stirring blade 40 each made of a plate-like body.
  • the longitudinal stirring blade 30 made of a plate-like body is provided at a position where the long side is parallel to the central axis 10 and defines the outer edge of the stirring unit 20.
  • the horizontal stirring blade 40 is positioned between the parallel central shaft 10 and the vertical stirring blade 30.
  • the vertical stirring blade 30 mainly has a function of preventing the molten glass from slipping near the wall surface of the molten glass conveying tube and stirring the molten glass.
  • the vertical stirring blade 30 preferably has support structures 30 a and 30 b extending from the upper and lower ends in the direction of the central axis 10 in terms of the support strength of the vertical stirring blade 30. Therefore, when the support strength of the vertical stirring blade is obtained, the support structures 30a and 30b may be omitted. In this case, the vertical stirring blade 30 is indirectly supported by the central shaft 10 via the horizontal stirring blade 40. However, it is preferable to have at least one of the support structures 30a and 30b.
  • the support structures 30a and 30b are provided in portions other than the upper and lower ends of the vertical stirring blade 30 (such as an intermediate portion of the vertical stirring blade 30) (support structures corresponding to 30a and 30b are provided in the intermediate portion of the vertical stirring blade 30). However, in consideration of the stirring function of the molten glass, it is preferably provided at the upper and lower ends of the vertical stirring blade 30.
  • the glass stirring device 1 shown in FIGS. 1 to 3 has four vertical stirring blades 30, but the number of vertical stirring blades in the glass stirring device 1 of the present invention is not limited to this.
  • the number of longitudinal stirring blades is preferably 2 to 8, more preferably 3 to 6.
  • the dimension of the vertical stirring blade 30 is appropriately selected according to the dimension of the molten glass transport pipe in which the glass stirring device is installed, the viscosity of the molten glass being transported, and the transport amount.
  • the maximum diameter D 2 of the outer edge of the stirring unit 20 determined by the installation position of the vertical stirring blade 30 is expressed by the following formula (1) in relation to the diameter D 1 of the transport pipe 100 at the site where the glass stirring device 1 is installed. It is necessary to satisfy.
  • the length L of the long side of the vertical stirring blade 30 is transported by the relationship with the maximum diameter D 2 of the outer edge of the stirring unit 20 or the length of the portion where the glass stirring device 1 can be installed in the molten glass transport tube 100. It is suitably selected according to the viscosity or the transport amount of the molten glass. Note that when viewed in relation to the maximum diameter D 2 of the outer edge of the stirring unit 20, the length L of the long side of the vertical stirring blade 30 satisfies 0.5 ⁇ D 2 ⁇ L ⁇ 3 ⁇ D 2. Preferably, D 2 ⁇ L ⁇ 2.5 ⁇ D 2 is satisfied, and 1.2 ⁇ D 2 ⁇ L ⁇ 2 ⁇ D 2 is more preferable.
  • the width W of the short side of the vertical stirring blade 30 is the size of the other components of the glass stirring device 1, specifically, the maximum diameter D 2 of the outer edge of the stirring unit 20, the diameter D 3 of the central shaft 10, or the horizontal It is appropriately selected according to the relationship with the length of the stirring blade 40, the viscosity of the molten glass being conveyed, and the conveyance amount.
  • the width W of the short side of the vertical stirring blade 30 satisfies 0.01 ⁇ D 2 ⁇ W ⁇ 0.2 ⁇ D 2. Is more preferable, 0.05 ⁇ D 2 ⁇ W ⁇ 0.15 ⁇ D 2 is more preferable, and 0.07 ⁇ D 2 ⁇ W ⁇ 0.15 ⁇ D 2 is more preferable.
  • the width of the outer end face and the inner end face of the vertical stirring blade 30 is defined as the thickness t of the vertical stirring blade 30.
  • the thickness t of the vertical stirring blade 30, the relationship and the maximum diameter D 2 of the outer edge of the agitating portion 20, other dimensions of the vertical stirring blade 30, specifically, the length L and width W of the vertical stirring blade 30 Ya Depending on the constituent material of the vertical stirring blade 30, the viscosity of the molten glass to be transported and the transport amount are appropriately selected.
  • the thickness t of the vertical stirring blade 30 preferably satisfies 0.01 ⁇ D 2 ⁇ t ⁇ 0.3 ⁇ D 2 , It is more preferable that 0.03 ⁇ D 2 ⁇ t ⁇ 0.2 ⁇ D 2 is satisfied, and it is more preferable that 0.05 ⁇ D 2 ⁇ t ⁇ 0.15 ⁇ D 2 is satisfied.
  • the constituent material of the vertical stirring blade 30 is not particularly limited as long as it is a material having heat resistance and erosion resistance to molten glass, and it is preferable to use platinum or a platinum rhodium alloy having excellent heat resistance. .
  • the horizontal stirring blade 40 made of a plate-like body is located between the central shaft 10 and the vertical stirring blade 30.
  • the horizontal stirring blade 40 has a long side orthogonal to the central axis 10 and a short side inclined with respect to the axial direction of the central axis 10.
  • the side orthogonal to the central axis 10 is the long side
  • the side orthogonal to the long side is the short side. Therefore, depending on the shape of the horizontal stirring blade, the apparent long side-short side relationship and the long side-short side relationship in the present invention may be reversed.
  • the horizontal stirring blade 40 has a function of preventing the slippage on the side of the central shaft 10 relative to the vertical stirring blade 30, particularly around the central shaft 10, and increasing the residence time of the molten glass passing through the portion where the stirring unit 20 is provided.
  • shaft 10 side rather than the vertical stirring blade 30 improves.
  • the inclination angle ⁇ of the horizontal stirring blade 40 with respect to the central axis 10 is 10 to 70 degrees, preferably 30 to 60 degrees, and more preferably 40 to 50 degrees.
  • the number of horizontal stirring blades provided between the central shaft 10 and the vertical stirring blades 30 is not limited to this.
  • one horizontal stirring blade 40 is provided between the central shaft 10 and the vertical stirring blades 30.
  • five or more horizontal stirring blades 40 may be provided.
  • the number of horizontal stirring blades provided between the central shaft 10 and the vertical stirring blades 30 is preferably 1 to 8.
  • the distance between the horizontal stirring blades 40 provided between the central shaft 10 and the vertical stirring blades 30 should not be too narrow in terms of preventing an increase in the torque required to rotate the stirring unit 20. There is a need.
  • the side surface shape of the stirring unit 20 shown in FIG. 3 there is a space portion (that is, the horizontal stirring blade 40 exists) in the region surrounded by the central shaft 10, the vertical stirring blade 30, and the support structures 30 a and 30 b. If the ratio of the portion not to be used is reduced, the torque required to rotate the stirring unit 20 increases, which is not preferable.
  • the area of the region surrounded by the central shaft 10, the vertical stirring blade 30, and the support structures 30a and 30b that is, the horizontal stirring blade 40 exists.
  • the ratio ((S 1 / (S 1 + S 2 )))) is preferably 80% or less, more preferably 60% or less, and further preferably 20 to 60%.
  • the length i of the horizontal stirring blade 40 is the size of the other components of the glass stirring device 1, specifically, the maximum diameter D 2 of the outer edge of the stirring unit 20, the diameter D 3 of the central shaft 10, and the vertical stirring blade 30. It is appropriately selected according to the relationship with the width W.
  • the height h of the horizontal stirring blade 40 is appropriately determined according to the relationship (S 1 / (S 1 + S 2 )) described above, the inclination angle ⁇ of the horizontal stirring blade 40, the viscosity of the molten glass being transported, and the transport amount. Selected.
  • the thickness of the horizontal agitating blade 40 depends on other dimensions of the horizontal agitating blade 40, specifically, the length i and the height h of the horizontal agitating blade 40, the constituent material of the horizontal agitating blade 40, and the molten glass to be conveyed. It is appropriately selected according to the viscosity and the conveyance amount.
  • the constituent material of the horizontal stirring blade 40 when the constituent material of the horizontal stirring blade 40 is the above-described material, it is preferable that 0.005 ⁇ i ⁇ thickness ⁇ 0.4 ⁇ i. More preferably, 0.01 ⁇ i ⁇ thickness ⁇ 0.2 ⁇ i, and even more preferably 0.015 ⁇ i ⁇ thickness ⁇ 0.1 ⁇ i.
  • the torque required to rotate the stirring unit 20 increases as the diameter of the central shaft 10 increases. Further, when the diameter of the central shaft 10 is increased, a region surrounded by the central shaft 10, the vertical stirring blade 30 and the support structures 30a and 30b in FIG. 3 is narrowed. In this region, the molten glass passing through the central axis 10 side from the vertical stirring blade 30 is stirred. Therefore, if this region is too narrow, the function of stirring the molten glass by the horizontal stirring blade 40 is lowered, which is not preferable. For the above reason, the maximum diameter D 2 (mm) of the outer edge of the stirring unit 20 and the diameter of the central shaft 10 (more specifically, the diameter of the central shaft 10 near the lower end portion constituting the glass stirring unit 20).
  • D 3 (mm) is preferably D 3 ⁇ 0.6 ⁇ D 2 , more preferably D 3 ⁇ 0.5 ⁇ D 2 , and D 3 ⁇ 0.45 ⁇ D 2 . More preferably.
  • the central shaft 10 may be damaged by stress during turning. From this viewpoint, when the constituent material of the central shaft 10 is the material described above, the maximum diameter D 2 (mm) of the outer edge of the stirring unit 20 and the diameter of the central shaft 10 (more specifically, of the central shaft 10, It is preferable that D 3 ⁇ 0.1 ⁇ D 2 satisfies the diameter D 3 near the lower end constituting the glass stirring unit 20.
  • Patent Document 3 includes a rotary shaft 9, first flat plates 3 and 4, third flat plates 7 and 8, and second flat plates 5 and 6 that are inclined at an angle ⁇ 2 with respect to the axial direction of the rotary shaft 9.
  • a molten glass stirring blade 1 is disclosed (see FIG. 6 of the present application).
  • the molten glass stirring blade of the same document is intended for stirring in a small-scale continuous furnace, and stirs the molten glass having a small flow rate, that is, held in the melting tank for a certain period of time.
  • the reason why the second flat plates 5 and 6 are inclined at an angle ⁇ 2 with respect to the axial direction of the rotating shaft 9 is to push up the molten glass held in the melting tank to the upper side of the melting tank. .
  • the glass stirrer of the present invention is installed in a molten glass conveyance tube that conveys molten glass having a viscosity of 100 to 7000 dPa ⁇ s at a conveyance amount of 1 to 50 m 3 / hour ⁇ S (S is a cross-sectional area of the conveyance tube). Since it is used, the vertical stirring blade prevents the molten glass from slipping through in the vicinity of the wall surface of the conveying tube and stirs the molten glass in the vicinity of the wall surface of the molten glass conveying tube. Therefore, the molten glass should not be pushed upward as in the second flat plates 5 and 6 disclosed in Patent Document 3.
  • the outer edge position of the stirring section is preferably about 2/3 of the inner diameter of the dissolution tank. . If the width dimension I is larger than the above preferred range, the second flat plates 5 and 6 provided to be inclined with respect to the axial direction of the rotary shaft 9 may come into contact with the inner wall of the dissolution tank.
  • the glass stirring device 1 of the present invention is installed in the molten glass transport tube through which the molten glass is transported, and the molten glass in the molten glass transport tube is stirred.
  • the application target of the present invention is not particularly limited, but for a molten glass conveyance tube that conveys a molten glass having a viscosity of 100 to 7000 dPa ⁇ s at a conveyance amount of 1 to 50 m 3 / hour ⁇ S (S is a cross-sectional area of the conveyance tube). It is preferable to apply.
  • the molten glass stirring method of the present invention has a glass substrate for FPD, an optical lens, an optical communication fiber, an optical filter, a solar cell substrate, and a fluorescent tube.
  • a glass substrate for FPD glass substrate for FPD
  • an optical lens optical communication fiber
  • an optical filter optical filter
  • a solar cell substrate glass substrate for FPD
  • a fluorescent tube it is preferable to apply to the stirring of the molten glass carried out in the process of producing the glass for applications in which the requirement for homogeneity is extremely severe.
  • the stirring conditions of the molten glass are not particularly limited, and the configuration of the glass stirring device to be used (number of vertical stirring blades and horizontal stirring blades, etc.), dimensions of each part of the glass stirring device, glass stirring What is necessary is just to select suitably according to the conditions (the viscosity of a molten glass, the conveyance amount, etc.) regarding the molten glass conveyed in the dimension of the molten glass conveyance pipe which installs an apparatus, and the inside of a molten glass conveyance pipe.
  • the plate glass manufacturing apparatus has, as a minimum configuration, a glass melting apparatus that melts glass raw materials to form molten glass, and a sheet glass forming apparatus that forms molten glass to form sheet glass (for example, a molding apparatus using a float method or a downdraw method). And in order to convey the molten glass obtained with this glass melting apparatus to a sheet glass shaping
  • the sheet glass manufacturing apparatus usually has components other than the glass melting apparatus and the sheet glass forming apparatus. As an example of such other components, there is a vacuum degassing device for refining molten glass.
  • the plate glass manufacturing apparatus has a some molten glass conveyance tube normally.
  • the above-described glass stirring apparatus of the present invention is installed in any one or a plurality of these molten glass transport pipes.
  • the position where the glass stirring apparatus of the present invention is installed is not particularly limited. Therefore, you may install the glass stirring apparatus of this invention in any molten glass conveyance tube which comprises a plate glass manufacturing apparatus.
  • the number of the glass stirring apparatus to install is not specifically limited.
  • the plate glass production apparatus includes a vacuum degassing apparatus as a constituent element
  • at least one of the molten glass conveyance pipe on the upstream side of the vacuum degassing apparatus and the molten glass conveyance pipe on the downstream side of the vacuum defoaming apparatus is installed in the plate glass manufacturing apparatus.
  • the glass stirring device of the invention in producing a highly homogenous plate glass, both in the molten glass conveyance tube on the upstream side of the vacuum degassing device and in the molten glass conveyance tube on the downstream side of the vacuum degassing device. It is more preferable to install the glass stirring device of the present invention.
  • the plate glass manufacturing apparatus of the present invention can be applied to the manufacture of plate glass for various uses, but it is particularly applicable to the manufacture of plate glass for uses where the requirements for homogeneity are extremely severe, such as a glass substrate for FPD. preferable.
  • plate glass production apparatus of the present invention By producing plate glass using the plate glass production apparatus of the present invention, plate glass having no transparency, high transparency, and high flatness can be obtained.
  • FIG. 4 is a schematic diagram of the molten glass conveyance tube used in the model test, and shows a state in which the glass stirring device 1 shown in FIGS. 1 to 3 is disposed in the molten glass conveyance tube (however, schematically As shown, the shape does not necessarily match that of FIG. 3).
  • the fluid moves in the direction of the arrow in the figure.
  • the dimensions of the molten glass conveyance tube shown in FIG. 4 are as follows.
  • Example 1 The behavior of the fluid when the glass stirrer 1 of the present invention shown in FIGS. 1 to 3 was inserted into the conveying tube and stirred was evaluated.
  • the dimensions of each part of the glass stirrer are as follows. Maximum diameter D 2 of the outer edge of the stirring unit 20: 38 mm Diameter of central axis 10 (part constituting stirring unit 20) D 3 : 10 mm Length L of the vertical stirring blade 30: 60 mm Width W of the vertical stirring blade 30: 3.8 mm Thickness t of the vertical stirring blade 30: 3.8 mm Inclination angle ⁇ of the horizontal stirring blade 40 with respect to the central axis 10: 60 ° The length i of the horizontal stirring blade 40 is 10.2 mm.
  • FIG. 8 is a diagram schematically showing the behavior of the fluid during stirring.
  • fluid can be effectively prevented from slipping around the wall surface of the molten glass conveying tube and around the central axis.
  • the fluid simulating the molten glass is cut by the stirring action (reference numeral 100), gradually stretched (reference numeral 200), and flows downstream.
  • FIG. 9 is a diagram schematically showing the behavior of the fluid during stirring. As can be seen from FIG. 9, according to the glass stirring apparatus 1′a of Comparative Example 1, it is possible to prevent fluid from slipping near the wall surface of the transport pipe, but near the center of the transport pipe (around the central axis of the stirring apparatus). The fluid slipped through. As a result, the fluid simulating the molten glass flowed downstream without being cut.
  • Comparative Example 2 A glass stirring apparatus 1′b shown in FIG. 6 was used.
  • the glass stirring apparatus 1′b shown in FIG. 6 has the same shape as the molten glass stirring blade shown in FIG.
  • the dimensions of each part of the glass stirrer 1′b shown in FIG. 6 are as follows.
  • FIG. 10 is a diagram schematically showing the behavior of fluid during stirring. As is clear from FIG.
  • the glass stirring apparatus 1′b of Comparative Example 2 has a stirring action of the fluid near the center of the transport pipe (around the central axis of the stirring apparatus), and the fluid simulating the molten glass is cut. (Reference numeral 100), although it was gradually stretched (reference numeral 200), it was not possible to prevent the fluid from slipping near the wall surface of the transfer pipe.
  • Comparative Example 3 A glass stirring apparatus 1′c shown in FIG. 7 was used.
  • the glass stirring device 1′c shown in FIG. 7 has the same shape as the homogenizing device shown in FIG.
  • the dimensions of each part of the glass stirrer 1′c shown in FIG. 7 are as follows.
  • the long axis of the inclined member 40 ′′ is inclined with respect to the central axis 10 ′, but the short axis is not inclined with respect to the central axis 10 ′.
  • FIG. 11 is a diagram schematically showing the behavior of the fluid during stirring.
  • the glass stirring device 1′c of Comparative Example 3 fluid slipping near the wall surface of the transport pipe is somewhat prevented, but the vicinity of the center of the transport pipe (the central axis of the stirring device) The stirring action of the surrounding fluid was inferior.
  • the fluid simulating the molten glass was cut (reference numeral 100), but flowed downstream without being stretched (reference numeral 300).
  • Example 2 As an example of plate glass production, plate glass is produced using a glass melting device, a first molten glass conveyance tube, a vacuum degassing device, a second molten glass conveyance tube, and a plate glass production device having a float forming device.
  • the first and second molten glass transport pipes are provided with the glass stirring device 1 of the present invention shown in FIGS.
  • a glass raw material is heated and melted with a glass melting apparatus to obtain molten glass.
  • the molten glass passes through the first molten glass conveyance tube, the vacuum degassing device, the second molten glass conveyance tube, and the float forming device in this order and is formed into a sheet glass.
  • the molten glass is stirred by the glass stirrer of the present invention in the process of being transported through the first and second molten glass transport pipes to improve the homogeneity, has no mixture of unmelted raw materials, has high transparency, and is flat. A plate glass with a high degree is obtained.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Glass Compositions (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

La présente invention concerne un dispositif de mélange de verre fondu, grâce auquel du verre fondu ayant une viscosité de 100 à 7 000 dPa.s est mélangé dans une conduite de transport de verre fondu, à travers laquelle le verre fondu est transporté à une vitesse de 1 à 50 m3/h S (S étant l'aire de la section de la conduite de transport). Le dispositif de mélange du verre fondu est composé d'une tige centrale pouvant être mise en rotation et d'un mélangeur disposé sur la tige centrale. Le mélangeur est composé de lames mélangeuses latérales et de lames mélangeuses verticales, chaque lame comprenant un objet en forme de plaque. Les lames mélangeuses latérales ont été disposées de sorte à ce que les faces plus longues soient perpendiculaires à la tige centrale et à ce que les faces plus courtes soient inclinées dans la direction de l'axe de la tige centrale, de 10 à 70 degrés. Les lames mélangeuses verticales ont été disposées de sorte à ce que les faces plus longues soient parallèles à la tige centrale et soient situées en des positions définissant la périphérie du mélangeur. Si le diamètre de la conduite de transport du verre fondu, dans la portion où le mélangeur est placé, est désigné par D1 (mm), et si le diamètre maximal de la périphérie du mélangeur est désigné par D2 (mm), alors D1 et D2 vérifient la relation : 0,8×D1 ≤ D2 ≤ 0,98×D1.
PCT/JP2010/052790 2009-02-27 2010-02-23 Dispositif destiné à mélanger du verre fondu WO2010098328A1 (fr)

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CN201080006093.9A CN102300819B (zh) 2009-02-27 2010-02-23 熔融玻璃搅拌装置

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US20110032791A1 (en) * 2008-04-03 2011-02-10 Umicore Ag & Co. Kg Stirring system and method for homogenizing glass melts
US20130003492A1 (en) * 2006-12-21 2013-01-03 Lee Martin Adelsberg Stirrers for minimizing erosion of refractory metal vessels in a glass making system
EP2511327A3 (fr) * 2011-04-14 2013-01-16 Sapsa Bedding S.R.L. Procédé de fabrication d'une mousse composite
WO2014181732A1 (fr) * 2013-05-08 2014-11-13 旭硝子株式会社 Dispositif d'agitation pour verre fondu
JP2016069217A (ja) * 2014-09-30 2016-05-09 ＡｖａｎＳｔｒａｔｅ株式会社 ディスプレイ用ガラス基板の製造方法、ディスプレイ用ガラス基板の製造装置、熔融ガラス用撹拌槽、熔融ガラス用撹拌子、および熔融ガラスの撹拌方法
JP2016079087A (ja) * 2014-10-14 2016-05-16 旭硝子株式会社 溶融ガラス攪拌装置、板ガラス製造装置、溶融ガラス攪拌方法、および板ガラス製造方法
EP3059007A1 (fr) * 2015-02-23 2016-08-24 Umicore AG & Co. KG Agitateur pour mélanger du verre fondu, appareil pour agiter le verre comprenant un tel agitateur et utilisation dudit agitateur

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CN103645088B (zh) * 2013-12-11 2015-10-07 广州赛宝计量检测中心服务有限公司 一种具有自动搅拌功能的固体熔融装置及使用方法
CN107721132B (zh) * 2017-12-10 2020-05-08 山东正信药用玻璃有限公司 一种玻璃加工用冶炼熔炉

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US20130003492A1 (en) * 2006-12-21 2013-01-03 Lee Martin Adelsberg Stirrers for minimizing erosion of refractory metal vessels in a glass making system
US8485717B2 (en) * 2006-12-21 2013-07-16 Corning Incorporated Stirrers for minimizing erosion of refractory metal vessels in a glass making system
US8961000B2 (en) * 2008-04-03 2015-02-24 Umicore Ag & Co. Kg Stirring system with interspaced stirring elements and baffles, and method for homogenizing glass melts
US20110032791A1 (en) * 2008-04-03 2011-02-10 Umicore Ag & Co. Kg Stirring system and method for homogenizing glass melts
EP2511327A3 (fr) * 2011-04-14 2013-01-16 Sapsa Bedding S.R.L. Procédé de fabrication d'une mousse composite
JPWO2014181732A1 (ja) * 2013-05-08 2017-02-23 旭硝子株式会社 溶融ガラス攪拌装置
WO2014181732A1 (fr) * 2013-05-08 2014-11-13 旭硝子株式会社 Dispositif d'agitation pour verre fondu
JP2016069217A (ja) * 2014-09-30 2016-05-09 ＡｖａｎＳｔｒａｔｅ株式会社 ディスプレイ用ガラス基板の製造方法、ディスプレイ用ガラス基板の製造装置、熔融ガラス用撹拌槽、熔融ガラス用撹拌子、および熔融ガラスの撹拌方法
JP2016079087A (ja) * 2014-10-14 2016-05-16 旭硝子株式会社 溶融ガラス攪拌装置、板ガラス製造装置、溶融ガラス攪拌方法、および板ガラス製造方法
EP3059007A1 (fr) * 2015-02-23 2016-08-24 Umicore AG & Co. KG Agitateur pour mélanger du verre fondu, appareil pour agiter le verre comprenant un tel agitateur et utilisation dudit agitateur
WO2016135084A1 (fr) * 2015-02-23 2016-09-01 Umicore Ag & Co.Kg Dispositif d'agitation de verre fondu
USD800807S1 (en) 2015-02-23 2017-10-24 Umicore Ag & Co. Kg Stirrer
USD800808S1 (en) 2015-02-23 2017-10-24 Umicore Ag & Co. Kg Stirrer
USD849070S1 (en) 2015-02-23 2019-05-21 Umicore Ag & Co. Kg Stirrer
US10676385B2 (en) 2015-02-23 2020-06-09 Umicore Ag & Co. Kg Device for stirring molten gas
USD918279S1 (en) 2015-02-23 2021-05-04 Umicore Ag & Co. Kg Stirrer

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CN102300819B (zh) 2014-11-26
KR20110130390A (ko) 2011-12-05
CN102300819A (zh) 2011-12-28
TW201038499A (en) 2010-11-01
JP5510446B2 (ja) 2014-06-04

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