JPH0656433A - Method for homogenizing molten glass - Google Patents
Method for homogenizing molten glassInfo
- Publication number
- JPH0656433A JPH0656433A JP23774392A JP23774392A JPH0656433A JP H0656433 A JPH0656433 A JP H0656433A JP 23774392 A JP23774392 A JP 23774392A JP 23774392 A JP23774392 A JP 23774392A JP H0656433 A JPH0656433 A JP H0656433A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- nozzle
- bubbling
- glass
- bubbling nozzle
- 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.)
- Pending
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
- C03B5/18—Stirring devices; Homogenisation
- C03B5/193—Stirring devices; Homogenisation using gas, e.g. bubblers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガラス熔融炉の炉底に
設けたバブリングノズルから熔融ガラス中に気泡を発生
させることによって熔融ガラスに対流を誘起せしめ、そ
の攪拌効果によって熔融ガラスを均質化する方法に関す
る。BACKGROUND OF THE INVENTION The present invention relates to a glass bubbling nozzle provided at the bottom of a glass melting furnace to generate bubbles in the glass so that convection is induced in the glass and the stirring effect homogenizes the glass. On how to do.
【０００２】[0002]
【従来の技術】一般に、ガラス熔融炉の熔解槽において
熔融中のガラスの均質化を促進し、泡、ストーン、脈理
等のガラス欠陥の少ない高品質なガラスを得るために、
炉底にバブリングノズルを設け、気泡を発生させること
によって熔融ガラスに物理的対流を誘起させるバブリン
グという技術が実施されている。2. Description of the Related Art In general, in order to promote homogenization of glass during melting in a melting tank of a glass melting furnace and obtain high quality glass with few glass defects such as bubbles, stones and striae,
A technique called bubbling in which a bubbling nozzle is provided on the bottom of a furnace to induce physical convection in a molten glass by generating bubbles is being carried out.
【０００３】ここで簡単にバブリングの効果を述べてお
くと、以下の通りである。The effect of bubbling will be briefly described below.
【０００４】（１）物理的対流による攪拌効果によって
熔融ガラスが均質化され脈理が減少する。(1) The molten glass is homogenized by the stirring effect of physical convection and the striae are reduced.
【０００５】（２）炉底の低温ガラスを表面に持ち上げ
ることにより、火炎からの熱吸収が改善されるため、燃
料節約になると同時に熔融炉上部構造における温度を下
げることができ、該上部構造から落下するストーンが減
少する。(2) By raising the low temperature glass at the bottom of the furnace to the surface, the heat absorption from the flame is improved, which saves fuel and at the same time lowers the temperature in the superstructure of the melting furnace. The falling stones are reduced.
【０００６】（３）炉底の低温域に停滞する失透ガラス
によるストーンが減少する。(3) Stones due to devitrified glass that stagnates in the low temperature region of the furnace bottom are reduced.
【０００７】以上のような大きな効果を有するバブリン
グを行う場合、ガラス熔融炉の炉底耐火物にバブリング
ノズルを設けて熔融ガラス中に気体を噴出し気泡を発生
させるのが普通である。気体としては空気、酸素、窒素
等が用いられる。バブリングノズルとしては、白金、耐
熱鋼、セラミックス等の材質が使用可能であるが，取り
扱い易さ、水冷が不要であること、さらに寿命の長さに
よる操炉の安定性という利点を考えると白金が優れてお
り、広く使用されている。In the case of performing bubbling having a great effect as described above, it is usual to provide a bubbling nozzle in a furnace bottom refractory of a glass melting furnace to eject gas into the molten glass to generate bubbles. Air, oxygen, nitrogen or the like is used as the gas. Materials such as platinum, heat-resistant steel, and ceramics can be used for the bubbling nozzle, but platinum is considered to be advantageous in that it is easy to handle, does not require water cooling, and is stable in the operating furnace due to its long life. Excellent and widely used.
【０００８】従来では、図２に示すようにバブリングノ
ズル１は、炉底耐火物２の炉外底面から水平な炉内底面
にむかって垂直に挿入して設置され、熔融ガラス３中へ
気泡４を発生させ熔融ガラスに上昇流５の対流を誘起さ
せている。バブリングノズル１の熔融ガラス中への突出
し長は、炉内底面から数十ミリから１００ミリ程度であ
るのが一般的である。Conventionally, as shown in FIG. 2, the bubbling nozzle 1 is vertically installed from the outer bottom surface of the furnace bottom refractory 2 toward the horizontal inner bottom surface of the furnace bottom refractory 2, and bubbles 4 are introduced into the molten glass 3. Is generated to induce convection of the upward flow 5 in the molten glass. The protruding length of the bubbling nozzle 1 into the molten glass is generally several tens to 100 mm from the bottom surface of the furnace.
【０００９】[0009]
【発明が解決しようとする課題】ところで、熔融ガラス
３の組成中にＰｂＯ、Ｓｂ2 Ｏ3 、Ａｓ2 Ｏ3 、ＺｎＯ
等の金属酸化物を含む場合は熔融条件等により、前記酸
化物が簡単に還元され、熔融炉の炉底にＰｂ、Ｓｂ、Ａ
ｓ、Ｚｎ等の金属６が析出して堆積する。そして析出し
た前記金属６は熔融ガラス３の上昇流５によって生ずる
炉底のバブリングノズル１へむかって流れ込む熔融ガラ
スの流れ７に伴われて移動し、白金あるいは耐熱鋼のバ
ブリングノズル１の突出部を被い、それと反応して脆い
化合物を形成し、ノズルの損傷を引き起こす。その結
果、ノズルからの気泡４の発生が不安定、あるいは不可
能となり、先記のバブリング効果が得られずガラス品質
の低下を招いていた。By the way, in the composition of the glass melt 3, PbO, Sb 2 O 3 , As 2 O 3 and ZnO are contained.
When a metal oxide such as Pb, Sb, A, etc. is contained in the bottom of the melting furnace, the oxide is easily reduced depending on the melting conditions.
Metals 6 such as s and Zn are deposited and deposited. Then, the deposited metal 6 moves along with the flow 7 of the molten glass flowing toward the bubbling nozzle 1 at the bottom of the furnace generated by the ascending flow 5 of the molten glass 3, and the protruding portion of the bubbling nozzle 1 of platinum or heat-resistant steel is moved. Covers and reacts with it to form brittle compounds, causing nozzle damage. As a result, the generation of the bubbles 4 from the nozzle becomes unstable or impossible, and the above-mentioned bubbling effect cannot be obtained, resulting in deterioration of glass quality.
【００１０】本発明の目的は、前記従来の欠点を解消
し、ガラス組成中の金属酸化物が還元され熔融炉の炉底
に異物の金属が析出して堆積した場合でも、バブリング
ノズルから安定した気泡の発生を確保し、ストーン、脈
理等のガラス欠陥を生じない高品質なガラスを得ること
にある。The object of the present invention is to solve the above-mentioned conventional drawbacks and to stabilize from the bubbling nozzle even when the metal oxide in the glass composition is reduced and the foreign metal is deposited and deposited on the bottom of the melting furnace. It is to secure the generation of bubbles and obtain high quality glass that does not cause glass defects such as stones and striae.
【００１１】[0011]
【課題を解決するための手段】本発明は、ガラス熔融炉
の炉底に設けたバブリングノズルから気泡を発生させる
ことによって熔融ガラスに対流を誘起せしめる方法にお
いて、バブリングノズルを設ける炉底耐火物の炉内側ノ
ズル突出し面を水平な炉内底面に対してほぼ垂直にする
と共に、ノズル突出し位置を水平な炉内底面より上に位
置するようにし、このバブリングノズルから気泡を発生
させるようにしたものである。DISCLOSURE OF THE INVENTION The present invention is a method for inducing convection in a molten glass by generating bubbles from a bubbling nozzle provided at the bottom of a glass melting furnace. The nozzle protruding surface inside the furnace is made almost vertical to the horizontal bottom surface inside the furnace, the nozzle protruding position is located above the horizontal bottom surface inside the furnace, and bubbles are generated from this bubbling nozzle. is there.
【００１２】[0012]
【作用】本発明では、バブリングノズルを設ける炉底耐
火物の炉内側ノズル突出し面が水平な炉内底面に対して
ほぼ垂直になっており、しかもそのノズル突出し位置が
水平な炉内底面より上に位置するようになっており、そ
のためこのバブリングノズルに、炉底に析出し堆積する
異物の金属が触れることがないので、ノズルの損傷を引
き起こすことがなく、バブリングを長期に亘って適正に
行える。According to the present invention, the furnace inner nozzle projecting surface of the furnace bottom refractory provided with the bubbling nozzle is substantially perpendicular to the horizontal furnace bottom surface, and the nozzle projecting position is above the horizontal furnace bottom surface. Therefore, the bubbling nozzle does not come in contact with foreign metal that deposits and accumulates on the bottom of the furnace, so that the bubbling can be properly performed for a long time without causing damage to the nozzle. .
【００１３】[0013]
【実施例】以下に、本発明の実施例を図１を参照して説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG.
【００１４】本発明では、バブリングノズル１を設ける
炉底耐火物２は、炉内側ノズル突出し面８が水平な炉内
底面にたいしてほぼ垂直に形成されている。バブリング
ノズル１は、炉外底面から炉底耐火物２を斜め方向に貫
通して挿入され突出し面８から熔融ガラス３中へ突出し
ており、その突出し位置は水平な炉内底面より上の位
置、例えば３０から１００ｍｍになっている。本発明は
かかる位置に設置されているバブリングノズル１から熔
融ガラス３中に気泡４を発生させることによって、上昇
流５を誘起させる。In the present invention, the furnace bottom refractory 2 provided with the bubbling nozzle 1 is formed substantially vertically with respect to the furnace bottom surface where the furnace inner nozzle projecting surface 8 is horizontal. The bubbling nozzle 1 is inserted from the outer bottom surface of the furnace bottom through the furnace bottom refractory 2 in an oblique direction and protrudes from the protruding surface 8 into the molten glass 3, and the protruding position is a position above the horizontal inner bottom surface. For example, it is 30 to 100 mm. The present invention induces an upward flow 5 by generating bubbles 4 in the glass melt 3 from the bubbling nozzle 1 installed at such a position.
【００１５】本発明においては、炉底に析出して堆積す
る金属６が熔融ガラスの流れ７に伴ってバブリングノズ
ル１の付近に移動してきても、前記のようにバブリング
ノズル１が炉内底面から離れた上の位置にあるため、該
金属がバブリングノズル１に達して触れることがなく、
バブリングノズル１と反応して脆い化合物を形成し、こ
れの損傷を引き起こすことはない。In the present invention, even if the metal 6 deposited and deposited on the bottom of the furnace moves to the vicinity of the bubbling nozzle 1 along with the flow 7 of the molten glass, the bubbling nozzle 1 moves from the bottom surface of the furnace as described above. Since the metal is located at a distance above, the metal does not reach the bubbling nozzle 1 and touch it,
It reacts with the bubbling nozzle 1 to form a brittle compound and does not cause damage to it.
【００１６】[0016]
【発明の効果】以上説明したように、本発明はバブリン
グノズルを挿入する炉底耐火物の形状、及びバブリング
ノズルの設置位置を図１の実施例のようにすることによ
って、炉底に堆積する異物の金属によるバブリングノズ
ルの損傷が引き起こされず、バブリングノズルから気泡
を長期に亘り常に安定して発生させることができる。こ
の結果、安定した所望のガラス対流が誘起され、バブリ
ング効果による熔融ガラスの均質化が十分に図られるた
め、高品質なガラスを得ることができる。As described above, according to the present invention, the shape of the furnace bottom refractory into which the bubbling nozzle is inserted and the installation position of the bubbling nozzle are set as in the embodiment of FIG. 1 to deposit on the furnace bottom. The bubbling nozzle is not damaged by the metal of the foreign matter, and the bubbles can be constantly and stably generated from the bubbling nozzle for a long period of time. As a result, stable desired glass convection is induced, and the molten glass is sufficiently homogenized by the bubbling effect, so that high quality glass can be obtained.
【図１】本発明のバブリングノズルの設置状態を示す断
面図である。FIG. 1 is a cross-sectional view showing an installed state of a bubbling nozzle of the present invention.
【図２】従来のバブリングノズルの設置状態を示す断面
図である。FIG. 2 is a cross-sectional view showing an installed state of a conventional bubbling nozzle.
１ バブリングノズル ２ 炉底耐火物 ３ 熔融ガラス ４ 気泡 ８ ノズル突出し面 1 Bubbling nozzle 2 Furnace bottom refractory 3 Molten glass 4 Bubble 8 Nozzle protruding surface
Claims (1)
ノズルから気泡を発生させることによって熔融ガラスに
対流を誘起せしめる方法において、バブリングノズルを
設ける炉底耐火物の炉内側ノズル突出し面を水平な炉内
底面に対してほぼ垂直にすると共に、ノズル突出し位置
を水平な炉内底面より上に位置するようにし、前記バブ
リングノズルから気泡を発生させることを特徴とする熔
融ガラスを均質化する方法。1. A method for inducing convection in a glass melt by generating bubbles from a bubbling nozzle provided at the bottom of a glass melting furnace, wherein the nozzle-projecting surface of the furnace bottom refractory provided with the bubbling nozzle is horizontal. A method for homogenizing a glass melt, which is characterized by making the nozzle protruding position to be above the horizontal bottom surface of the furnace while being substantially vertical to the bottom surface of the furnace, and generating bubbles from the bubbling nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23774392A JPH0656433A (en) | 1992-08-13 | 1992-08-13 | Method for homogenizing molten glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23774392A JPH0656433A (en) | 1992-08-13 | 1992-08-13 | Method for homogenizing molten glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0656433A true JPH0656433A (en) | 1994-03-01 |
Family
ID=17019817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23774392A Pending JPH0656433A (en) | 1992-08-13 | 1992-08-13 | Method for homogenizing molten glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0656433A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001515453A (en) * | 1998-01-09 | 2001-09-18 | サン−ゴバン ビトラージュ | Method for melting and refining vitrizable substances |
| JP2001518049A (en) * | 1998-01-26 | 2001-10-09 | サン−ゴバン ビトラージュ | Method for melting and refining vitrizable substances |
| KR20030069778A (en) * | 2002-10-21 | 2003-08-27 | 희성금속 주식회사 | Mixer formed by bubbling tube |
| WO2007052489A1 (en) * | 2005-10-31 | 2007-05-10 | Ohara Inc. | Optical glass, apparatus for producing optical glass, and process for producing the same |
| JP2007126297A (en) * | 2005-10-31 | 2007-05-24 | Ohara Inc | Method of and device for producing optical glass |
| JP2007126298A (en) * | 2005-10-31 | 2007-05-24 | Ohara Inc | Optical glass |
| JP2014189429A (en) * | 2013-03-26 | 2014-10-06 | Osaka Gas Co Ltd | Glass melting furnace |
| CN107857463A (en) * | 2016-09-21 | 2018-03-30 | 巨石集团有限公司 | A kind of kiln bubbling device arrangement |
-
1992
- 1992-08-13 JP JP23774392A patent/JPH0656433A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001515453A (en) * | 1998-01-09 | 2001-09-18 | サン−ゴバン ビトラージュ | Method for melting and refining vitrizable substances |
| JP2001518049A (en) * | 1998-01-26 | 2001-10-09 | サン−ゴバン ビトラージュ | Method for melting and refining vitrizable substances |
| KR20030069778A (en) * | 2002-10-21 | 2003-08-27 | 희성금속 주식회사 | Mixer formed by bubbling tube |
| WO2007052489A1 (en) * | 2005-10-31 | 2007-05-10 | Ohara Inc. | Optical glass, apparatus for producing optical glass, and process for producing the same |
| JP2007126297A (en) * | 2005-10-31 | 2007-05-24 | Ohara Inc | Method of and device for producing optical glass |
| JP2007126298A (en) * | 2005-10-31 | 2007-05-24 | Ohara Inc | Optical glass |
| JP2014189429A (en) * | 2013-03-26 | 2014-10-06 | Osaka Gas Co Ltd | Glass melting furnace |
| CN107857463A (en) * | 2016-09-21 | 2018-03-30 | 巨石集团有限公司 | A kind of kiln bubbling device arrangement |
| EP3431445A4 (en) * | 2016-09-21 | 2019-12-11 | Jushi Group Co., Ltd. | Arrangement structure for bubbling apparatuses of furnace |
| CN107857463B (en) * | 2016-09-21 | 2020-05-19 | 巨石集团有限公司 | Kiln bubbling device arrangement structure |
| US11097972B2 (en) | 2016-09-21 | 2021-08-24 | Jushi Group Co., Ltd. | Arrangement structure for bubbling apparatuses of furnace |
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