WO2016125667A1 - ガラス製造用スターラー - Google Patents

ガラス製造用スターラー Download PDF

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Publication number
WO2016125667A1
WO2016125667A1 PCT/JP2016/052440 JP2016052440W WO2016125667A1 WO 2016125667 A1 WO2016125667 A1 WO 2016125667A1 JP 2016052440 W JP2016052440 W JP 2016052440W WO 2016125667 A1 WO2016125667 A1 WO 2016125667A1
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WO
WIPO (PCT)
Prior art keywords
stirrer
blade
shaft
glass
socket
Prior art date
Application number
PCT/JP2016/052440
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
吉田　弘
哲雄 篠原
長沼　努
Original Assignee
田中貴金属工業株式会社
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 田中貴金属工業株式会社 filed Critical 田中貴金属工業株式会社
Publication of WO2016125667A1 publication Critical patent/WO2016125667A1/ja

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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

Definitions

  • the present invention relates to a stirrer for producing glass for stirring and homogenizing molten glass. Specifically, the present invention relates to a stirrer for glass production that can stir molten glass with high efficiency and is excellent in durability.
  • the glass material that has been adjusted and mixed is melted, and the glass in the molten state is homogenized and the refractive index is homogenized by stirring the molten glass, and then molded into glass. It is a product.
  • This stirring step is a particularly important step in the glass production process under the circumstances where a glass product that is homogeneous and free of defects (such as striae and bubbles) is desired.
  • a stirrer for glass production is configured by installing a stirrer blade (hereinafter sometimes simply referred to as a blade) as a stirring blade on a stirrer shaft (hereinafter simply referred to as a shaft) that serves as a rotating shaft.
  • a stirrer blade hereinafter sometimes simply referred to as a blade
  • a stirrer shaft hereinafter simply referred to as a shaft
  • Patent Document 1 describes a glass production stirrer in which a rod-like blade is fixed to a stirrer shaft by penetrating it and installed in multiple stages.
  • Patent Document 2 describes a glass production stirrer in which two sets of rod-shaped blades protruding on both sides around a stirrer shaft are fixed so as to intersect.
  • the performance preferentially required for a glass production stirrer is to exhibit an effective stirring action so that a suitable flow state can be imparted to the molten glass and homogenization can be achieved.
  • glasses with various properties have been developed to meet various applications and requirements. Among them, many glasses have a high viscosity in the molten state, and it is required to arrange a blade so that an effective stirring action can be exerted even on such a high-viscosity molten glass.
  • the stirrers for glass production are required to have durability as equipment.
  • Molten glass is a fluid having a high temperature of 1000 ° C. or higher, and a glass production stirrer for treating the molten glass is exposed to a severe use environment.
  • the load applied to the blade is considerably large, and there is a concern about durability due to the high viscosity of the molten glass.
  • this invention aims at providing the stirrer for glass manufacture which is excellent in durability and cannot produce a breakage easily, exhibiting the stirring effect
  • the present invention for solving the above-mentioned problems is a glass production stirrer comprising a hollow pipe-shaped stirrer shaft and at least two stirrer blades fixed through the stirrer shaft, wherein the at least two stirrers are provided. At least one stirrer blade of the blade passes through the stirrer shaft in a divided state, and the at least two stirrer blades are fixed so as to intersect near the center line of the stirrer shaft,
  • a stirrer for glass production characterized in that the stirrer shaft includes a socket that has an outer shape in which at least two cylindrical bodies intersect each other and surrounds the stirrer blade inside the stirrer shaft.
  • a part or all of the blades are divided and passed through the shaft, thereby eliminating the mutual interference of the blades and crossing them.
  • the ends of the divided blades are in a free state, so that the fixing is insufficient. Therefore, by setting a socket for holding the intersecting blade inside the shaft, a plurality of intersecting blades are integrated to stabilize the shaft.
  • the stirrer for glass production according to the present invention will be described in more detail.
  • the present invention is characterized by the configuration of the socket installed in the shaft and the arrangement relationship of the blades.
  • the socket has an outer shape in which at least two cylinders intersect and communicate with each other at the intersection.
  • intersection state can be formed by inserting and hold
  • FIG. 1 is a specific example of a socket, and a blade can be inserted into the opening of the socket to form a crossed blade (FIG. 2).
  • the blades can be evenly fixed by notching the tip portions of the divided stirrer blades to form a processed surface. As shown in FIG. 3, a split blade having a machining surface is inserted, and the machining surfaces of the respective stirrer blades are crossed in the vicinity of the intersecting portion of the socket, so that a constraining force by the socket is added and an integral blade is formed. Is done.
  • blade division all the blades may be divided as described above (FIG. 3), but one blade without division can be partially used. At this time, one stirrer blade is inserted and held through one of the cylindrical bodies of the socket, and the divided stirrer blade is inserted and held from both ends of the other cylindrical body ( FIG. 4).
  • a single stirrer blade can be passed through and held in the first cylinder, and the stirrer blade divided into the second cylinder can be inserted and held (FIG. 6).
  • the present invention can provide a belt-shaped reinforcing ring that abuts against the inner wall surface of the stirrer shaft and has a through hole at a position corresponding to the end of the cylindrical body of the socket. With this reinforcing ring, the blade can be more stably fixed (FIG. 7).
  • the stirrer for producing glass according to the present invention is characterized in that the socket and the reinforcing ring described above are provided inside the shaft, whereby the blades are appropriately arranged, and other configurations are the same as those of the conventional stirrer. .
  • the constituent material of the blade is preferably a platinum-based material such as platinum, platinum alloy, reinforced platinum, or reinforced platinum alloy. This is because it is preferable to apply a high-melting-point material excellent in chemical stability in order to process a high-melting-point molten glass.
  • platinum-based material include pure platinum and platinum alloys such as platinum-rhodium alloys (for example, platinum-5 to 30% by weight rhodium alloy) or platinum-gold alloys (for example, platinum-5% by weight gold alloy).
  • reinforced platinum or reinforced platinum alloy is a dispersion strengthened alloy in which a metal oxide is dispersed in platinum or a platinum alloy.
  • This reinforced platinum or reinforced platinum alloy is more suitable as a structural material for a glass manufacturing apparatus used in a high temperature environment because it has excellent high temperature strength characteristics, particularly high temperature creep strength.
  • Preferred dispersed particles of reinforced platinum or reinforced platinum alloy are refractory valve metal oxides such as zirconium oxide and yttrium oxide, and rare earth metal oxides such as samarium oxide.
  • the dispersed particles preferably have a particle size of less than 1 ⁇ m, particularly about several tens of nanometers, and the amount of the dispersed particles is preferably several weight% or less.
  • the matrix may be platinum or platinum-rhodium alloy (for example, platinum-5 to 30 wt% rhodium alloy) or platinum-gold alloy (for example, platinum-5 wt% gold alloy) as platinum alloy. preferable.
  • the configuration of the blade is preferably a rod shape, and preferably a hollow pipe shape in consideration of light weight and material cost.
  • the blade is a hollow cylindrical body formed by winding a flat plate made of the above-mentioned platinum-based material and seam-welding two opposing sides, and a circular cylinder formed by welding the disk made of the same material to both ends of the cylinder. Often served as. In this case, the plate thickness is preferably 1.5 mm or more.
  • the constituent material of the socket is preferably platinum, platinum alloy, reinforced platinum, or reinforced platinum alloy. The same applies to the reinforcing ring.
  • the constituent material of the shaft that functions as the rotating shaft of the blade is preferably a platinum-based material (platinum, platinum alloy, reinforced platinum, reinforced platinum alloy) as in the case of the blade.
  • the ratio (Db / Ds) between the diameter (Db) and the diameter (Ds) of the stirrer shaft is preferably 1/3 or less.
  • Db / Ds exceeds 1/3 (when the blade diameter is large), there is a danger that the diameter of the hole in the shaft increases and the strength of the shaft decreases.
  • the lower limit of Db / Ds does not need to be set specifically, but is preferably 1/10 from a practical viewpoint such as a stirring action.
  • the number of blades is not limited. It is not limited to what the two blades penetrating the shaft intersect so far.
  • a stirrer having three or more blades penetrated (FIG. 8). Preferably, 2 to 4 blades cross each other. Further, the blade may penetrate horizontally with respect to the shaft, but may be inclined. Further, the crossing angle between the blades is not limited.
  • the blade is installed in a plurality of stages. That is, it is preferable that at least two stirrer blades intersecting substantially on the center line of the stirrer shaft are one set of blade groups, and one or more sets of blade groups are fixed to the stirrer shaft in multiple stages.
  • the number of stages is preferably 2 to 10 stages. In one stage, the stirring action is weak, and those exceeding 10 stages are excluded from the viewpoint of material cost.
  • the number of stages is set in consideration of the size (depth) of the stirring tank.
  • the blade that penetrates the shaft is preferably welded at the base of the shaft. This is to provide a seal that prevents the molten glass from entering the shaft. Welding also has the effect of complementarily fixing the blade. However, since the heat-affected zone formed by welding as described above is in an unfavorable state in terms of strength, the welding of the blade is sufficient for welding the blade so as to seal the gap with the shaft.
  • the glass production stirrer according to the present invention has an optimal balance between the arrangement state of the blade and the fixed strength, and various conventional stirrers are used when stirring high-viscosity molten glass. In addition to having a higher stirring action, durability is also ensured.
  • the figure explaining an example of the socket for blade fixation used by this invention The figure explaining an example of the braid
  • the figure explaining the example of the blade fixation by the socket of FIG. The figure explaining the example of application of a reinforcement ring.
  • FIG. 9 is an external view of the stirrer for glass production produced in the present embodiment.
  • This stirrer for glass production is one in which two rod-shaped blades orthogonal to each other are set on a stirrer shaft made of a hollow pipe.
  • the blade is a pipe manufactured by winding a reinforced platinum alloy plate having a thickness of 1.5 mm and seam welding the butt portion (thickness 1.5 mm, diameter 20 mm, length 200 mm).
  • This reinforced platinum is platinum in which zirconium oxide is dispersed using a platinum-10% rhodium alloy (trade name: nanoplat (registered trademark), manufactured by Tanaka Kikinzoku Kogyo) as a matrix.
  • the stirrer shaft is made of the same reinforced platinum hollow pipe (thickness 2.0 mm, diameter 60 mm, length 500 mm). A hole (diameter 21 mm) for penetrating the blade is drilled in the shaft.
  • ⁇ A blade with the same structure as the socket shown in Fig. 5 is used to fix the blade to the shaft.
  • the blade was fixed in such a manner that the socket opening and the shaft hole were aligned with each other, and after the socket was built in the shaft, the blades were sequentially inserted and connected (FIG. 6). Then, the base of the blade joint portion on the outer surface of the shaft was joined by seam welding. At this time, with respect to the cross section of the blade in the welded portion, the heat input was adjusted so that the depth of the heat affected zone was 1.2 mm or less. The interval between the lower blade and the upper blade is 150 mm.
  • simulation of molten glass stirring was performed to confirm the stirring action.
  • commercially available simulation software (trade name: ANSYS CFD, manufactured by Ansys Japan) was used. This simulation is to analyze the Mises stress distribution in the stirrer when one stirrer is installed in the stirring tank and the molten glass flow is stirred.
  • the simulation conditions were a molten glass flow temperature: 1400 ° C., a glass viscosity of 100 Pa ⁇ s, and a stirrer rotation speed of 20 rpm.
  • the life of each stirrer was referenced based on the high temperature creep curve (stress-rupture time diagram) for the reinforced platinum alloy applied in this embodiment. As a result, assuming that the life of the comparative example is 1 year, the life of the stirrer of this embodiment is about 9 years, and it has been found that there is a significant effect of improving the life.
  • the stirrer for producing a glass according to the present invention has a high stirring action even when stirring high-viscosity molten glass and has excellent durability.
  • the invention can be used in particular for the production of glass panes for LCDs, OLEDs or plasma displays, and for the homogenization of glass melts in glass products such as glass ceramics, borosilicate glasses, optical glasses, glass tubes.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
PCT/JP2016/052440 2015-02-03 2016-01-28 ガラス製造用スターラー WO2016125667A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-018923 2015-02-03
JP2015018923A JP6431394B2 (ja) 2015-02-03 2015-02-03 ガラス製造用スターラー

Publications (1)

Publication Number Publication Date
WO2016125667A1 true WO2016125667A1 (ja) 2016-08-11

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PCT/JP2016/052440 WO2016125667A1 (ja) 2015-02-03 2016-01-28 ガラス製造用スターラー

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JP (1) JP6431394B2 (zh)
TW (1) TWI606020B (zh)
WO (1) WO2016125667A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110104938A (zh) * 2019-04-30 2019-08-09 湖北新华光信息材料有限公司 一种用于高均匀光学玻璃生产搅拌装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1059726A (ja) * 1996-08-21 1998-03-03 Furuya Kinzoku:Kk ガラス撹拌装置
JP2004149338A (ja) * 2002-10-29 2004-05-27 Tanaka Kikinzoku Kogyo Kk ガラス製造用スターラー
JP2014148453A (ja) * 2013-02-04 2014-08-21 Tanaka Kikinzoku Kogyo Kk ガラス製造用スターラー

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1059726A (ja) * 1996-08-21 1998-03-03 Furuya Kinzoku:Kk ガラス撹拌装置
JP2004149338A (ja) * 2002-10-29 2004-05-27 Tanaka Kikinzoku Kogyo Kk ガラス製造用スターラー
JP2014148453A (ja) * 2013-02-04 2014-08-21 Tanaka Kikinzoku Kogyo Kk ガラス製造用スターラー

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JP2016141601A (ja) 2016-08-08
TWI606020B (zh) 2017-11-21
JP6431394B2 (ja) 2018-11-28
TW201702190A (zh) 2017-01-16

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