WO2015128924A1 - 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 PDFInfo
- Publication number
- WO2015128924A1 WO2015128924A1 PCT/JP2014/054419 JP2014054419W WO2015128924A1 WO 2015128924 A1 WO2015128924 A1 WO 2015128924A1 JP 2014054419 W JP2014054419 W JP 2014054419W WO 2015128924 A1 WO2015128924 A1 WO 2015128924A1
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- WO
- WIPO (PCT)
- Prior art keywords
- stirrer
- blade
- shaft
- platinum
- glass
- Prior art date
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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
- C03B5/18—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
- C03B5/187—Stirring devices; Homogenisation with moving elements
-
- 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
- B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
- B01F27/053—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials
-
- 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
- B01F27/1121—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades pin-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
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- 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
- C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
- C03B5/1672—Use of materials therefor
- C03B5/1675—Platinum group metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/04—Alloys based on a platinum group metal
Definitions
- the present invention relates to a stirrer for producing glass for stirring and homogenizing molten glass.
- the present invention relates to a stirrer for glass production suitable for stirring molten glass having a high temperature or high viscosity.
- 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.
- the stirring process in this glass production process is a particularly important process under the circumstances where a glass product that has been homogeneous and free of defects (such as striae and bubbles) has been demanded.
- the molten glass stirring step is usually performed by inserting and rotating a glass production stirrer in a molten glass tank.
- This stirrer for glass production is configured by installing a stirrer blade (hereinafter sometimes simply referred to as a blade) on a stirrer shaft (hereinafter simply referred to as a shaft) serving 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
- Several forms are known for the shape of the blade installed on the shaft. For example, as shown in FIG. 5, a plurality of rod-shaped bodies are bladed in multiple stages on a shaft (see Patent Document 1), or a plate material is spirally joined to the outer periphery of the shaft as shown in FIG.
- JP 2004-149338 A Japanese Patent Laid-Open No. 2003-34539
- the problem here is that the increase in the stirring action and the reduction in the mechanical load are contradictory. That is, in order to increase the stirring action, it is conceivable to make contact with the molten glass more dynamically by increasing the surface area or the number of blades. For example, in the case of the stirrer provided with the spiral blade of FIG. 6, the stirring action is improved by changing the blade in a single row (single spiral) to the blade in a double row (double spiral). However, increasing the number of blades in this manner means increasing the number of resistors against the molten glass, and the torque value during stirring is increased.
- the present invention is particularly useful for stirring high-viscosity molten glass, and has an object to provide a stirrer for glass production that has a high stirring action, a low load during stirring, and is unlikely to be deformed or damaged. .
- the present invention for solving the above problems is a stirrer for glass production comprising a stirrer shaft and a plurality of bar stirrer blades fixed through the stirrer shaft, wherein the bar stirrer blade is made of platinum.
- a cylinder formed by seam welding two opposite sides of a flat plate made of reinforced platinum or reinforced platinum alloy in which a metal oxide is dispersed using a platinum alloy as a matrix, and a disk made of the same material welded to both ends of the cylinder
- the rod-shaped stirrer blade penetrates the stirrer shaft so that the weld line by seam welding intersects the central axis of the stirrer shaft, and the locus of the end thereof is
- the rod-shaped stirrer blade is fixed in a spiral shape, and the stirrer shaft is connected to the stirrer shaft.
- the cross-sectional structure of the anchoring portion having a core layer exhibiting dispersion tissue that is not thermally influenced by sticking a stirrer for glass production.
- the glass production stirrer according to the present invention has a rod-shaped blade spirally arranged as shown in FIG.
- the molten glass When the molten glass is agitated by a stirrer having a rod-shaped blade, the molten glass usually passes through a gap between the blades.
- a rod-shaped blade when a rod-shaped blade is spirally arranged and stirred with respect to a high-viscosity molten glass, the molten glass does not pass through the gap between the blades, and a helical plate blade (see FIG. A stirring state of the molten glass similar to 6) occurs.
- the molten glass flow by the spiral blade is a spiral flow directed upward of the molten glass tank.
- the rod-shaped blades by arranging the rod-shaped blades in a spiral shape, it is possible to obtain a more effective stirring state than the conventional blades in a spiral shape, and the torque during stirring is also increased. Can be reduced. This is basically because the molten glass does not pass through the gap between the blades, but there is a portion where the molten glass passes partially. In the molten glass passage portion, the molten glass flow is sheared to create a flow in a direction different from the spiral flow described above. And it is thought that the effective stirring state is obtained by low load by the local shear of this molten glass flow.
- the rod-shaped blades are fixed at regular intervals and at equal angles in a spiral shape.
- the interval angle between the blades is preferably 20 ° to 70 °. Particularly preferably, the interval angle is in the range of 25 ° to 45 °.
- the interval angle between the blades may be different, it is preferable that the blades are fixed at an equal angle in one direction.
- the gap between the blades in the axial direction of the shaft is preferably fixed at an interval of 10 to 20 mm regardless of the diameter of the rod-shaped blade. More preferably, this gap is 15 mm. This is because when the gap between the blades is set to the upper limit or more, the molten glass passes through the gap between the blades, and the target molten glass flow state cannot be reproduced.
- the number of stages which is the number of blades installed in the longitudinal direction of the shaft, is preferably 4 to 10 stages. If it is less than 4 stages, 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.
- a rod-like blade is passed through and fixed to the shaft. That is, the number of blades at each stage is fixed so that two rod-shaped blades are symmetrical with respect to the shaft.
- the reason for passing the blade through the shaft in this way is to secure the fixing strength between the blade and the shaft. That is, when the blade is abutted and fixed to the shaft, it is usually fixed by welding, but in that case, the material structure of the majority of the butted portion of the blade often changes (FIG. 2A). Since the material structure (heat-affected zone) formed by welding has a low tensile strength at high temperatures, it may break at the joint during use. In the first place, butt joining is inferior in fixing strength.
- the term “adhesion” in the present invention refers to welding that is sufficient to seal the gap at the joint between the blade and the shaft (the root portion of the blade) (FIG. 2B). Even at such a minimum welding location, the strength of the joint between the blade and the shaft is secured, and erosion of the molten glass can be eliminated.
- the constituent material of the blade is reinforced platinum or reinforced platinum alloy.
- the reinforced platinum or reinforced platinum alloy is a dispersion strengthened alloy in which a metal oxide is dispersed in platinum or a platinum alloy.
- Reinforced platinum or a strengthened platinum alloy is suitable as a structural material for glass manufacturing equipment used in a high temperature environment because it is excellent in 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 those having a dispersed amount of several mass% or less are preferable.
- the matrix may be platinum or platinum-rhodium alloy (for example, platinum-5 to 30% by mass rhodium alloy) or platinum-gold alloy (for example, platinum-5% by mass gold alloy) as platinum alloy. preferable.
- the blade is a hollow formed by winding a flat plate made of the above-mentioned reinforced platinum or reinforced platinum alloy and seam-welding two opposite sides, and a disk made of the same material at both ends of the cylinder. It is a cylindrical body.
- the hollow body is used in consideration of material cost and weight.
- the thickness of the flat plate made of reinforced platinum or reinforced platinum alloy is preferably 1.5 mm or more.
- the stirrer blade is fixed to the shaft so that the contact pressure with the glass during rotation of the stirrer is low, so that the weld line by seam welding during blade manufacture penetrates the stirrer shaft so that it intersects the central axis of the stirrer shaft. Let it stick.
- the reinforced platinum or reinforced platinum alloy which is a dispersion strengthened material that is a constituent material of the blade, melts and solidifies at the time of fixing such as welding, so that the particle dispersed structure that is a strengthened structure disappears.
- This heat-affected structure has a low tensile strength at a high temperature and causes damage at the portion where the blade and the shaft are fixed. Therefore, in the present invention, in the cross-sectional structure of the portion where the blade is fixed to the stirrer shaft, it is necessary that there is a core layer showing a dispersed structure that is not affected by heat due to fixing.
- the high-temperature strength (crepe strength) of reinforced platinum or reinforced platinum alloy can be maintained, and it can be rotated several times to several tens of times in molten glass with high viscosity. It can be used without deformation and breakage even if it is stirred by a number.
- the core layer preferably has an average thickness of 0.1 mm or more. It is because the high temperature strength (crepe strength) as reinforced platinum or a reinforced platinum alloy cannot be maintained as it is below that.
- the thickness of the core layer is preferably as thick as possible, but is preferably 1.0 mm or less in order to ensure the strength at the time of fixing.
- the thickness of the core layer is more preferably 0.2 to 0.8 mm.
- the blade length of the blade is preferably 150 to 600% of the diameter of the shaft, and can be set relatively freely.
- the blade length of the blade can be set by the viscosity of the molten glass and the diameter of the blade, but when the viscosity of the molten glass is about 200 to 400 Pa ⁇ s, it is more preferably 200 to 500% of the shaft diameter. Is preferred.
- the stirrer for glass production according to the present invention is a rod-like blade arranged in a spiral shape on a shaft, and when stirring high-viscosity molten glass, stirring higher than various conventional stirrers. In addition to being effective, the load on the blade is also reduced. Then, by applying reinforced platinum or reinforced platinum alloy as a constituent material of the blade and making the connection state with the shaft appropriate, the blade can be enlarged and firmly fixed to the shaft.
- mode of the stirrer for glass manufacture which concerns on this invention The figure explaining the adhering state of a braid
- stirrer for glass manufacture of FIG. 1 was manufactured, and the stirring effect was confirmed.
- a stirrer shaft (thickness 2.0 mm, diameter 3 cm, length 60 cm) was formed in a stirrer shaft made of a reinforced platinum hollow pipe, and a through hole for penetrating the blade was made to penetrate the stirrer blade.
- 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 (diameter 1.5 cm, length 15.5 cm).
- reinforced platinum in which zirconium oxide is dispersed using platinum as a matrix is applied.
- the pipe is passed through four shafts to form blades (that is, eight blades are formed).
- the blade position is constant at an angle of 45 ° between the blades with respect to the cross-sectional center of the blade, and the gap between the blades is 15 mm.
- the base part of the blade (the gap between the through hole and the blade) was seam welded and fixed.
- the amount of heat inputs was adjusted so that the depth of a heat affected zone might be 1.2 mm.
- the reinforcing material particles dispersed structure
- the stirrer shown in FIG. 1 (blade length: 6.25 cm) was manufactured by penetrating and welding the blade.
- a simulation of stirring the molten glass was performed to confirm the stirring action.
- commercially available simulation software (trade name: ANSYS CFX, manufactured by Ansys Japan) was used.
- the simulation conditions were as follows: molten glass flow temperature: 1300 ° C. ⁇ 50 ° C., viscosity of 400 Pa ⁇ s, the distance between the two stirrers was 20 cm, and the molten glass flow was perpendicular to the stirrer shaft.
- each stirrer was 10 rpm (the tip speed of the blade was about 500 cm per minute) in the direction of entraining the molten glass flow.
- this simulation is also performed for a stirrer provided with a conventional spiral blade (2.0 mm thickness ⁇ 6.25 cm width ⁇ 14 cm length).
- FIG. 4 shows the mixed state after 60 seconds from the start of stirring.
- the white portion is a portion with a high stirring effect.
- the stirring range extends to a range that is at least twice the blade length of the blade, and the higher the stirring stage is, the higher the stirring effect is. .
- the stirring effect is somewhat increased by making the blade double rather than single.
- the torque value increases rapidly by increasing the number of blades.
- This embodiment is similar in shape to the double spiral of the comparative example, but the torque value is lower than that and close to the middle between single and double. From this result, it can be seen that the stirrer of this embodiment has a reduced load (torque) while maximizing the stirring effect.
- FIG. 8 shows a cross section of the joint between the blade and the shaft in the present embodiment.
- the blade is a 1.5 mm thick pipe and has a core layer of 0.3 mm. That is, it is a composite material of 1.2 mm platinum alloy (platinum-10 mass% rhodium alloy) and 0.3 mm reinforced platinum.
- platinum alloy platinum-10 mass% rhodium alloy
- 0.3 mm reinforced platinum platinum
- the stirrer for producing a glass according to the present invention has a high stirring action even when stirring a high viscosity molten glass and has excellent durability.
- the invention can be used for the homogenization of glass melts in the production of glass, especially in the production of glass panes for LCD, OLED or plasma displays, 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)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims (6)
- スターラーシャフトと、前記スターラーシャフトを貫通して固着された複数段の棒状のスターラーブレードとからなるガラス製造用のスターラーであって、
前記棒状のスターラーブレードは、白金又は白金合金をマトリックスとして金属酸化物が分散する強化白金又は強化白金合金からなる平板の対向する2辺をシーム溶接してなる円筒と、前記円筒の両端に全周溶接された同材料からなる円盤とからなる中空の円柱体であり、
前記棒状のスターラーブレードは、前記シーム溶接による溶接線が前記スターラーシャフトの中心軸と交差するように前記スターラーシャフトに貫通し、かつ、その端部の軌跡がらせん状となるように固着され、
更に、前記棒状のスターラーブレードは、前記スターラーシャフトとの固着部分の断面組織において、固着による熱影響を受けていない分散組織を示す芯層を有する、ガラス製造用のスターラー。 - スターラーブレードは、前段のスターラーブレードとの間で10~20mmの隙間を有して固着されている請求項1記載のガラス製造用のスターラー。
- スターラーブレードの段数は、4~10である請求項1又は請求項2記載のガラス製造用のスターラー。
- スターラーブレードは、スターラーシャフトとの固着部分の断面組織において、0.1~1.0mm平均厚さの芯層を有する請求項1~請求項3のいずれかに記載のガラス製造用のスターラー。
- スターラーブレードを構成する強化白金又は強化白金合金は、分散する金属酸化物として酸化ジルコニウムまたは酸化イットリウムが分散するものである請求項1~請求項4のいずれかに記載のガラス製造用のスターラー。
- スターラーブレードを構成する強化白金合金は、白金-ロジウム合金または白金-金合金をマトリックスとして金属酸化物を分散させたものである請求項1~請求項5のいずれかに記載のガラス製造用のスターラー。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2014/054419 WO2015128924A1 (ja) | 2014-02-25 | 2014-02-25 | ガラス製造用スターラー |
CN201480075724.0A CN106029584B (zh) | 2014-02-25 | 2014-02-25 | 玻璃制造用搅拌器 |
EP14883693.5A EP3112322B1 (en) | 2014-02-25 | 2014-02-25 | Stirrer for glass manufacture |
KR1020167023469A KR101870061B1 (ko) | 2014-02-25 | 2014-02-25 | 유리 제조용 교반기 |
US15/117,415 US10435321B2 (en) | 2014-02-25 | 2014-02-25 | Stirrer for glass manufacture |
Applications Claiming Priority (1)
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PCT/JP2014/054419 WO2015128924A1 (ja) | 2014-02-25 | 2014-02-25 | ガラス製造用スターラー |
Publications (1)
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WO2015128924A1 true WO2015128924A1 (ja) | 2015-09-03 |
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PCT/JP2014/054419 WO2015128924A1 (ja) | 2014-02-25 | 2014-02-25 | ガラス製造用スターラー |
Country Status (5)
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US (1) | US10435321B2 (ja) |
EP (1) | EP3112322B1 (ja) |
KR (1) | KR101870061B1 (ja) |
CN (1) | CN106029584B (ja) |
WO (1) | WO2015128924A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018116530A1 (ja) * | 2016-12-22 | 2018-06-28 | 日本電気硝子株式会社 | 撹拌スターラー及びガラス板の製造方法 |
JP2018104212A (ja) * | 2016-12-22 | 2018-07-05 | 日本電気硝子株式会社 | 撹拌スターラー及びガラス板の製造方法 |
Families Citing this family (6)
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JP7053582B2 (ja) * | 2016-08-24 | 2022-04-12 | コーニング インコーポレイテッド | ガラス製造装置および方法 |
CN108854649A (zh) * | 2018-06-29 | 2018-11-23 | 杭州智仁建筑工程有限公司 | 一种用于混合装置的搅拌转轮 |
CN109621768B (zh) * | 2019-01-21 | 2024-04-09 | 中南大学 | 一种浸渍剂混合罐及其搅拌装置 |
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 |
CN112354629B (zh) * | 2020-10-21 | 2022-03-18 | 青岛即墨中联水泥有限公司 | 选粉机打散盘装置的组装装置及方法 |
CN113461311B (zh) * | 2021-06-30 | 2022-12-16 | 甘肃旭盛显示科技有限公司 | 一种消除玻璃条纹缺陷的方法 |
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2014
- 2014-02-25 CN CN201480075724.0A patent/CN106029584B/zh not_active Expired - Fee Related
- 2014-02-25 WO PCT/JP2014/054419 patent/WO2015128924A1/ja active Application Filing
- 2014-02-25 US US15/117,415 patent/US10435321B2/en not_active Expired - Fee Related
- 2014-02-25 EP EP14883693.5A patent/EP3112322B1/en active Active
- 2014-02-25 KR KR1020167023469A patent/KR101870061B1/ko active IP Right Grant
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2018116530A1 (ja) * | 2016-12-22 | 2018-06-28 | 日本電気硝子株式会社 | 撹拌スターラー及びガラス板の製造方法 |
JP2018104212A (ja) * | 2016-12-22 | 2018-07-05 | 日本電気硝子株式会社 | 撹拌スターラー及びガラス板の製造方法 |
US11708288B2 (en) | 2016-12-22 | 2023-07-25 | Nippon Electric Glass Co., Ltd. | Stirrer and method for manufacturing glass plate |
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Publication number | Publication date |
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CN106029584B (zh) | 2018-11-09 |
CN106029584A (zh) | 2016-10-12 |
KR101870061B1 (ko) | 2018-06-22 |
EP3112322A4 (en) | 2018-01-10 |
EP3112322B1 (en) | 2019-08-21 |
KR20160114140A (ko) | 2016-10-04 |
US10435321B2 (en) | 2019-10-08 |
EP3112322A1 (en) | 2017-01-04 |
US20160347638A1 (en) | 2016-12-01 |
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