JPH01224231A - Production of glass - Google Patents
Production of glassInfo
- Publication number
- JPH01224231A JPH01224231A JP4842388A JP4842388A JPH01224231A JP H01224231 A JPH01224231 A JP H01224231A JP 4842388 A JP4842388 A JP 4842388A JP 4842388 A JP4842388 A JP 4842388A JP H01224231 A JPH01224231 A JP H01224231A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- raw material
- fining agent
- clarifier
- glass raw
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002994 raw material Substances 0.000 claims abstract description 39
- 239000006025 fining agent Substances 0.000 claims description 39
- 238000002844 melting Methods 0.000 abstract description 15
- 230000008018 melting Effects 0.000 abstract description 15
- 239000006060 molten glass Substances 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract 4
- 238000003756 stirring Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- COHDHYZHOPQOFD-UHFFFAOYSA-N arsenic pentoxide Inorganic materials O=[As](=O)O[As](=O)=O COHDHYZHOPQOFD-UHFFFAOYSA-N 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000000156 glass melt Substances 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- GCPXMJHSNVMWNM-UHFFFAOYSA-N arsenous acid Chemical compound O[As](O)O GCPXMJHSNVMWNM-UHFFFAOYSA-N 0.000 description 2
- 239000008395 clarifying agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-N Arsenic acid Chemical compound O[As](O)(O)=O DJHGAFSJWGLOIV-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010040925 Skin striae Diseases 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- XWROSHJVVFETLV-UHFFFAOYSA-N [B+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O Chemical compound [B+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O XWROSHJVVFETLV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 229940000488 arsenic acid Drugs 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
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
- C03B5/225—Refining
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明はガラスの製造方法に係り、特にガラス原料を溶
融する際に発生する泡を効率的に除去し、高品質の製品
を得ることを可能とするガラスの製造方法に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a method for manufacturing glass, and in particular to a method for efficiently removing bubbles generated when melting glass raw materials to obtain a high-quality product. This invention relates to a glass manufacturing method that makes it possible to produce glass.
［従来の技術］
従来ガラス原料を溶融してガラス製品を製造するにあた
っては、製品の欠陥の原因となる泡を除去するために、
原料中に清澄剤、例えばボオ硝、亜砒酸、酸化アンチモ
ン等を添加し、その分解及び吸収反応を利用して清浄化
を図っていた。[Prior art] Conventionally, when manufacturing glass products by melting glass raw materials, in order to remove bubbles that cause product defects,
Purifying agents such as boron nitrate, arsenic acid, antimony oxide, etc. were added to the raw materials, and their decomposition and absorption reactions were utilized for purification.
清澄剤の種類及びその量はガラス組成及び溶融方法によ
って異なる。清澄剤の使用量については、一般には最適
な範囲があり、少なすぎれば溶解時に発生した泡を除去
することができず、多すぎれば温度変化等によって発泡
しやすくなることが知られている。The type of fining agent and its amount will vary depending on the glass composition and melting method. There is generally an optimum range for the amount of clarifier used, and it is known that if it is too small, it will not be possible to remove the bubbles generated during dissolution, and if it is too large, foaming will occur easily due to temperature changes, etc.
商品質のガラス製品を製造する場合、均質化の撹拌が必
要であるが、この撹拌によって泡が発生する場合がある
。この泡の発生を抑制する手段としては、溶解時の温度
を高くシ、撹拌時の温度を下げること、すなわち、温度
上昇によって清澄剤溶解量を下げ、温度下降によって清
澄剤溶解度を上げることが行なわれてきた。また清澄剤
使用量は、溶解時の泡が除去できる範囲で可能なかぎり
少なくすることが試みられてきた。When manufacturing commercial quality glass products, homogenization stirring is necessary, but this stirring may generate bubbles. As a means of suppressing the generation of bubbles, it is possible to raise the temperature during dissolution and lower the temperature during stirring.In other words, by increasing the temperature, the amount of clarifier dissolved is lowered, and by lowering the temperature, the solubility of the clarifier is increased. It's been coming. Furthermore, attempts have been made to reduce the amount of clarifier used as much as possible within the range that allows bubbles to be removed during dissolution.
［発明が解決しようとする課題］
このように従来の高品質ガラスの製造方法では、そのガ
ラス組成に適した清澄剤の種類及び量を選び、溶解時の
温度を高（し均質化撹拌時の温度を低くすることが一般
的であった。しかしながら、大気中で使用できる炉材及
び発熱体は、最高使用温度か１６００℃程度であり、１
５００〜１６００℃程度の温度でもｌｏｇη＝２・５〜
３・ ０もしくはそれ以上の粘度を有する高粘性のガラ
スでは、溶融温度を高くすることができす、溶融時に発
生する泡を除去するために低粘性のガラスに比べて多量
の清澄剤を使用する必要がある。ところが高粘性のガラ
スでは、撹拌棒の強度不足および均質化能力の低下のた
め撹拌時の温度を下げることができず、多量の清澄剤の
使用は撹拌による再発泡の危険を増大させるという問題
点がある。[Problems to be Solved by the Invention] As described above, in the conventional method for manufacturing high-quality glass, the type and amount of fining agent suitable for the glass composition is selected, the temperature during melting is increased (and the temperature during homogenization stirring is increased). It was common to lower the temperature.However, the maximum operating temperature of furnace materials and heating elements that can be used in the atmosphere is about 1600℃,
Even at temperatures of about 500 to 1600℃, log η = 2.5 ~
3. For high viscosity glasses with a viscosity of 0 or more, the melting temperature can be increased, and a larger amount of fining agent is used compared to lower viscosity glasses to remove bubbles generated during melting. There is a need. However, with highly viscous glass, the temperature during stirring cannot be lowered due to the lack of strength of the stirring rod and reduced homogenization ability, and the use of a large amount of clarifier increases the risk of re-foaming due to stirring. There is.
本発明の目的は上記従来の問題点を解決し、高温におい
ても高い粘度を有するガラス中の泡をも、少量の清澄剤
使用量で、効率良く、短時間で除去することができる方
法を提供することにある。The purpose of the present invention is to solve the above conventional problems and provide a method that can efficiently remove bubbles in glass that have high viscosity even at high temperatures in a short time using a small amount of fining agent. It's about doing.
［課題を解決するための手段］
本発明のガラスの製造方法は、清澄剤を含まないガラス
原料を溶融した後、ひきつづき清澄剤または清澄剤を含
むガラス原料を加えて撹拌して溶融させる方法である。[Means for Solving the Problems] The method for producing glass of the present invention is a method in which a glass raw material that does not contain a fining agent is melted, and then a fining agent or a glass raw material containing a fining agent is added, stirred, and melted. be.
本発明において、清澄剤または清澄剤を含むガラス原料
を加える時期は、清澄剤を含まない原料が加熱されて原
料の大部分が溶解し、原料の初期の発泡、すなわち原料
中の炭酸塩などの分解が終了した後であることが好まし
い。In the present invention, the timing of adding a fining agent or a glass raw material containing a fining agent is important because the raw material not containing a fining agent is heated and most of the raw material is dissolved, and the initial foaming of the raw material, that is, the carbonate etc. in the raw material is Preferably, after the decomposition is completed.
清澄剤あるいは清澄剤を含むガラス原料を投入後の撹拌
は、ガラス中に脈理が認められなくなる程度までである
ことが好ましい。After adding the fining agent or the glass raw material containing the fining agent, stirring is preferably carried out to such an extent that striae are no longer observed in the glass.
第１段として溶融（粗溶群）する清澄剤を含まないガラ
ス原料と、第２段として加える例えば清澄剤を含むガラ
ス原料との割合は、そのガラス原料中の清澄剤の割合お
よびガラスの泡ぬけ特性等により任意に調整されるが、
本発明の効果が表われやすい様に清澄剤を含むガラス原
料を溶融ガラス全体の５〜２０ｗｔ％相当とすることが
好ましい。The ratio of the glass raw material that does not contain a fining agent, which is melted in the first stage (crude melt group), and the glass raw material that contains a fining agent, which is added in the second stage, is determined by the proportion of the fining agent in the glass raw material and the glass bubbles. It can be adjusted arbitrarily depending on the shedding characteristics etc.
In order to easily exhibit the effects of the present invention, it is preferable that the amount of the glass raw material containing a refining agent is equivalent to 5 to 20 wt% of the total molten glass.
又第２段として加えられる、清澄剤又は清澄剤を含むガ
ラス原料中の清澄剤は、溶融ガラス全体の０．０５〜０
．５ｗｔ％とすることが好ましい。Further, the fining agent or the fining agent in the glass raw material containing the fining agent, which is added as the second stage, accounts for 0.05 to 0 of the total molten glass.
．． The content is preferably 5 wt%.
又第１段の溶融の温度と第２段の溶融の温度とは、同一
の温度であってもかまわないし、異なる温度であっても
かまわない。Further, the melting temperature in the first stage and the melting temperature in the second stage may be the same temperature or may be different temperatures.
又本発明の効果が最も良くあられれるのは、第１段とし
て溶融するガラス原料を清澄剤を含まないガラス原料と
した場合であるが、本発明の効果をそこなわない範囲に
おいて第１段として溶融するガラス原料中に微量の清澄
剤を含ませることも可能である。The effect of the present invention is best achieved when the glass raw material to be melted in the first stage is a glass raw material that does not contain a fining agent, but as long as the effect of the present invention is not impaired, it is possible to It is also possible to include a trace amount of a fining agent in the glass raw material to be melted.
［作 用］
ガラス原料中に添加した清澄剤の作用について、−例と
して亜砒酸を用いた場合について以下に示す。一般に亜
砒酸を用いる場合は酸化剤、例えば硝曹（ＮａＮＯ３）
を同時に使用する。[Function] The function of the fining agent added to the glass raw material will be described below in the case where arsenous acid is used as an example. Generally, when arsenous acid is used, an oxidizing agent such as nitric soda (NaNO3) is used.
be used at the same time.
Ａｓ２０３ ＋０２ →Ａｓ２０５
（１２００℃以下）
Ａｓ２０５−＊Ａｓ２０３ ＋０２
（１３００℃以上）
このような反応により、１３００℃以上で発生する０２
がガラス融液中に残留する泡に侵入して、泡を膨張させ
て浮上脱泡を促進する。As203 +02 → As205 (below 1200°C) As205-*As203 +02 (above 1300°C) Due to this reaction, 02 that occurs above 1300°C
enters the bubbles remaining in the glass melt, expands the bubbles, and promotes flotation and defoaming.
ここで、ガラス融液中に残留する泡とは、ガラス原料中
の炭酸塩などの分解及びガラス原料中に炉内雰囲気ガス
が閉じ込められることによって発生し、広い範囲の泡径
分布を持っている。従って従来の清澄剤が一定量均質に
含まれるガラス原料を溶融する場合には、１３００℃以
上で発生する０２は比較的大きな泡にも侵入し消費され
る。Here, the bubbles remaining in the glass melt are generated by the decomposition of carbonates, etc. in the glass raw materials and the trapping of the furnace atmosphere gas in the glass raw materials, and have a wide range of bubble size distribution. . Therefore, when melting a glass raw material homogeneously containing a certain amount of a conventional fining agent, the 02 generated at 1300° C. or higher penetrates into relatively large bubbles and is consumed.
本発明の方法に従って清澄剤を含まないガラス原料を粗
溶群すると、ガラス融液中に残留する泡の中で比較的大
きな泡は、清澄剤の助けがなくても浮上し脱泡する。そ
の後清澄剤あるいは清澄剤を含むガラス原料を加えて撹
拌によって清澄剤を均一に溶解させると、清澄剤の効果
によって浮上脱泡できる比較的小さな泡に対してのみ清
澄剤が有効に作用する。When glass raw materials containing no fining agent are crudely agglomerated according to the method of the present invention, relatively large bubbles among the bubbles remaining in the glass melt float to the surface and are defoamed without the aid of a fining agent. When a fining agent or a glass raw material containing a fining agent is then added and the fining agent is uniformly dissolved by stirring, the fining agent effectively acts only on relatively small bubbles that can be floated and defoamed by the effect of the fining agent.
以上のように本発明の方法は、浮上脱泡のために清澄剤
の効果が必要な比較的小さな泡にのみ清澄剤を作用させ
ることができるので、少ない清澄剤で泡を効率的に除去
できる。As described above, the method of the present invention allows the clarifier to act only on relatively small bubbles that require the effect of the clarifier for flotation and defoaming, so that bubbles can be efficiently removed with a small amount of clarifier. .
［実 施 例コ 以下に実施例を挙げて本発明をより詳細に説明する。[Implementation example] The present invention will be explained in more detail with reference to Examples below.
実施例１、比較例１
１５５０℃でｌｏｇη＝２．８７の粘度を持つアルミノ
シリケート系ガラス組成で全溶融ｆｆｌ（Ｍ。Example 1, Comparative Example 1 Total melting ffl (M.
Ｇ、）３．４ｋｇの８０％を清澄剤を含まないガラス原
料で投入し、１５５０℃で１時間溶融後、全溶融量の２
０％を清澄剤としてＡｓ２Ｏ５を０゜５ｗｔ％含むガラ
ス原料を投入し撹拌後１７時間溶融した。この場合Ａｓ
２０５ Ｋ全体での添加）コはＯ，１ｗｔ％である。ま
た比較例としてｌ＾澄剤としてＡｓ２Ｏ５を０．１ｗｔ
％均一に含むガラス原料を同条件で溶融した。G,) 80% of 3.4 kg was charged as a glass raw material containing no fining agent, and after melting at 1550°C for 1 hour, 2 of the total melted amount
A glass raw material containing 0.5 wt% of As2O5 was added using 0.0% as a clarifying agent, and after stirring, it was melted for 17 hours. In this case As
The total addition of 205 K is O, 1 wt%. As a comparative example, 0.1wt of As2O5 was used as a clarifying agent.
A glass raw material containing a uniform percentage of 100% was melted under the same conditions.
このようにして得られたカラス中に残留する心数を第１
表に示す。The number of hearts remaining in the crow obtained in this way is the first
Shown in the table.
第１表から明らかなように、清澄剤を含まないガラス原
料を投入後、清澄剤を含む原料を投入することにより、
清澄剤を均二に含むガラス原料を溶融する場合に比べて
心数が少な（なる。As is clear from Table 1, by adding glass raw materials that do not contain a fining agent and then adding raw materials that contain a fining agent,
The number of cores is smaller than when melting a glass raw material that evenly contains a fining agent.
第 １ 表
［発明の効果コ
以上詳述した通り、本発明のガラスの製造方法によれば
清澄剤を含まないガラス原料を溶融した後、清澄剤ある
いは清澄剤を含むガラス原料を加えて撹拌することによ
り、清澄剤の効果を必要とする比較的小さい泡に清澄剤
が有効に作用するので少ない清澄剤使用量で泡を効率的
に除去することができる。Table 1 [Effects of the Invention] As detailed above, according to the method for producing glass of the present invention, after melting a glass raw material that does not contain a fining agent, a fining agent or a glass raw material containing a fining agent is added and stirred. As a result, the clarifier effectively acts on relatively small bubbles that require the effect of the clarifier, so that bubbles can be efficiently removed with a small amount of clarifier.
Claims (1)
剤または清澄剤を含むガラス原料を加えて撹拌して溶融
するガラスの製造方法。A method for producing glass, in which a raw material that does not contain a fining agent is melted, and then a fining agent or a glass raw material containing a fining agent is added, stirred, and melted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4842388A JPH01224231A (en) | 1988-03-01 | 1988-03-01 | Production of glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4842388A JPH01224231A (en) | 1988-03-01 | 1988-03-01 | Production of glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01224231A true JPH01224231A (en) | 1989-09-07 |
Family
ID=12802921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4842388A Pending JPH01224231A (en) | 1988-03-01 | 1988-03-01 | Production of glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01224231A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336435A (en) * | 2021-06-30 | 2021-09-03 | 浙江本尊新材料科技有限公司 | Non-volatile harmless environment-friendly glass clarifying agent for amorphous arsenic and preparation and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50154308A (en) * | 1974-05-15 | 1975-12-12 | ||
| JPS60255634A (en) * | 1984-02-28 | 1985-12-17 | ザ イングリツシユ エレクトリツク カンパニ− リミテツド | Lithium aluminosilicate glass ceramic |
| JPS6325226A (en) * | 1986-07-07 | 1988-02-02 | ピ−ピ−ジ− インダストリ−ズ，インコ−ポレ−テツド | Foam control for vacuum clarification of glass material |
| JPS63215524A (en) * | 1987-03-04 | 1988-09-08 | Ohara Inc | Production of glass with high fluorine content |
-
1988
- 1988-03-01 JP JP4842388A patent/JPH01224231A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50154308A (en) * | 1974-05-15 | 1975-12-12 | ||
| JPS60255634A (en) * | 1984-02-28 | 1985-12-17 | ザ イングリツシユ エレクトリツク カンパニ− リミテツド | Lithium aluminosilicate glass ceramic |
| JPS6325226A (en) * | 1986-07-07 | 1988-02-02 | ピ−ピ−ジ− インダストリ−ズ，インコ−ポレ−テツド | Foam control for vacuum clarification of glass material |
| JPS63215524A (en) * | 1987-03-04 | 1988-09-08 | Ohara Inc | Production of glass with high fluorine content |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336435A (en) * | 2021-06-30 | 2021-09-03 | 浙江本尊新材料科技有限公司 | Non-volatile harmless environment-friendly glass clarifying agent for amorphous arsenic and preparation and application thereof |
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