JP2017065933A - Method for exchanging base material of molten glass and continuous glass melting furnace - Google Patents
Method for exchanging base material of molten glass and continuous glass melting furnace Download PDFInfo
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- 239000006060 molten glass Substances 0.000 title claims abstract description 82
- 238000006125 continuous glass melting process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 title claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 100
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims description 40
- 239000011521 glass Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 description 11
- 239000006121 base glass Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 8
- 238000005206 flow analysis Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006063 cullet Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
Description
本発明は、溶融ガラスの素地替え方法及び連続ガラス溶融炉に関する。 The present invention relates to a method for replacing a molten glass and a continuous glass melting furnace.
従来、連続ガラス溶融炉における溶融ガラスの素地替え（例えば、組成の変更や色の変更）方法としては、溶融中のガラスとは異なる品種の溶融ガラスを投入し、溶融中のガラスを順次流出させる方法（押し出し法）と、溶融炉から溶融ガラスの大部分を一旦排出した後に新たな溶融ガラスを投入する方法（素地抜き法）とがある。 Conventionally, as a method for changing the base of molten glass in a continuous glass melting furnace (for example, changing the composition or changing the color), a molten glass of a different kind from the glass being melted is introduced, and the glass being melted is sequentially discharged. There are a method (extrusion method) and a method (base blanking method) in which a large portion of the molten glass is once discharged from the melting furnace and then a new molten glass is introduced.
押し出し法は、炉の規模や要求ガラス品質にも依存するが、素地替えに通常１週間程度の日数を要する。特に、溶融中のガラスと新たな溶融ガラスとの密度差が大きい場合や、着色した溶融ガラスから着色していない新たな溶融ガラスへ素地替えする場合は、素地替えにさらに長期間を要する。 Although the extrusion method depends on the scale of the furnace and the required glass quality, it usually takes about one week to change the substrate. In particular, when the density difference between the molten glass and the new molten glass is large, or when the substrate is changed from a colored molten glass to a new molten glass that is not colored, it takes a longer time to change the substrate.
素地抜き法は、溶融中のガラスと新たな溶融ガラスとの密度差が大きい場合や、着色した溶融ガラスから着色していない新たな溶融ガラスへ素地替えする場合は、押し出し法よりも短期間で素地替えを行うことができる。 The base blanking method takes less time than the extrusion method when the density difference between the molten glass and the new molten glass is large, or when replacing the colored molten glass with a new molten glass that is not colored. The substrate can be changed.
例えば特許文献１には、溶融槽の底壁または側壁の下部に配設された溶融ガラスの素地抜き出し口を有する連続ガラス溶融炉が記載されている。 For example, Patent Document 1 describes a continuous glass melting furnace having a molten glass base outlet disposed on the bottom wall or the lower part of a side wall of a melting tank.
しかしながら、押し出し法及び素地抜き法の何れにおいても、溶融炉の隅部付近の溶融ガラスが排出されずに残りやすいことから、溶融ガラスを完全に素地替えするには長時間を要する。 However, in both the extrusion method and the base blanking method, the molten glass in the vicinity of the corner of the melting furnace tends to remain without being discharged, so it takes a long time to completely replace the molten glass.
本発明の目的は、素地替えを容易に、且つ短期間で行うことのできる溶融ガラスの素地替え方法及び連続ガラス溶融炉を提供することにある。 An object of the present invention is to provide a molten glass substrate changing method and a continuous glass melting furnace capable of easily changing the substrate material in a short period of time.
本発明者等は、後述する数値流れ解析結果から、隅部に原料バッチを投入すれば、隅部付近の溶融ガラスの滞留が解消して速やかに排出されることを見出した。図３はここで使用した解析モデルを平面視して示している。数値流れ解析の概要を以下に示す。 The present inventors have found from numerical flow analysis results described later that if a raw material batch is introduced into the corner, the stay of the molten glass in the vicinity of the corner is eliminated and discharged immediately. FIG. 3 shows the analysis model used here in plan view. The outline of numerical flow analysis is shown below.
解析に使用したモデルは、高さ２００ｍｍ、幅２００ｍｍ、長さ３００ｍｍの大きさを有し、上流側側壁１１、左側壁１２、右側壁１３、下流側側壁１４、底壁１５及び天井(図示せず)からなる矩形容器である。異種溶融ガラスの投入口は、上流側側壁１１の中央部（投入位置１６）、上流側側壁１１の両隅部付近（投入位置１８ａ、１８ｃ）の３ケ所とした。溶融ガラス（素地）の抜き出し口１９は、下流側側壁と左側側壁とで囲まれる隅部の炉底に設定した。 The model used for the analysis has a height of 200 mm, a width of 200 mm, and a length of 300 mm, and includes an upstream side wall 11, a left side wall 12, a right side wall 13, a downstream side wall 14, a bottom wall 15 and a ceiling (not shown). A rectangular container. The inlets for the different types of molten glass were set at three locations, the center of the upstream side wall 11 (introduction position 16) and the vicinity of both corners (introduction positions 18a and 18c) of the upstream side wall 11. The outlet 19 for molten glass (base) was set at the bottom of the furnace surrounded by the downstream side wall and the left side wall.
このモデルにおいて、まず液面高さが５０ｍｍとなるまで投入位置から溶融ガラス（前素地ガラスＡ）を供給し、次に液面高さが１５５ｍｍになるまで異種溶融ガラス（後素地ガラスＢ）を投入し、続いて液面高さが５０ｍｍに戻るまで抜き出し口１９から溶融ガラスを排出した。ここで投入位置を１６とした場合を解析例１、投入位置を１８ａ及び１８ｃとした場合を解析例２として、表面における素地ガラスの残留割合を数値解析により求めた。 In this model, first, molten glass (front substrate glass A) is supplied from the charging position until the liquid level reaches 50 mm, and then different molten glass (rear substrate glass B) is supplied until the liquid level reaches 155 mm. Then, the molten glass was discharged from the outlet 19 until the liquid level returned to 50 mm. Here, the case where the charging position is set to 16 is Analysis Example 1, and the case where the charging position is set to 18a and 18c is set to Analysis Example 2, and the residual ratio of the base glass on the surface is obtained by numerical analysis.
その結果、解析例１では、表面の素地ガラスの残留割合が２５．２％（図４（ａ））であり、また上流側の両隅部に素地ガラスが残存していた。一方、解析例２では、表面の素地ガラスの残留割合が１９．１％（図４（ｂ））であり、また上流側の両隅部には素地ガラスの残存が認められなかった。これらの解析結果から、隅部から素地替え用原料バッチ（異種原料バッチ）を投入すれば、当該隅部に存在する素地ガラスの滞留が解消されることが明らかになった。 As a result, in Analysis Example 1, the residual ratio of the base glass on the surface was 25.2% (FIG. 4A), and the base glass remained at both corners on the upstream side. On the other hand, in Analysis Example 2, the residual ratio of the base glass on the surface was 19.1% (FIG. 4B), and no residual base glass was observed at both corners on the upstream side. From these analysis results, it became clear that if a raw material changing raw material batch (heterogeneous raw material batch) is introduced from a corner, retention of the base glass present in the corner is eliminated.
この解析結果にヒントを得て、本発明者等は以下の発明を提案するものである。 Based on the result of this analysis, the inventors propose the following invention.
即ち、本発明の溶融ガラスの素地替え方法は、上流側に設けられた原料投入口から原料バッチを投入し、下流側に設けられた流出口から溶融ガラスを流出させて成形手段に送る連続ガラス溶融炉内で、溶融ガラスを素地替えする溶融ガラスの素地替え方法であって、原料投入口とは別に設けられた素地替え用原料投入口から、溶融ガラスとは異なる組成となるように調合された異種原料バッチを投入することを特徴とする。ここで「溶融ガラスの素地替え」とは、ある組成の溶融ガラスを別の組成の溶融ガラスに置き換えることを意味する。「原料バッチ」とは、所定のガラス組成となるように調合されたガラス原料及び／又はガラスカレットである。 That is, the method for replacing the molten glass substrate of the present invention is a continuous glass in which a raw material batch is introduced from a raw material inlet provided on the upstream side, and the molten glass is discharged from an outlet provided on the downstream side and sent to the forming means. A molten glass substrate replacement method for replacing molten glass in a melting furnace, which is prepared so as to have a composition different from that of the molten glass from a raw material charging port provided separately from the raw material charging port. Another feature is that different batches of raw materials are charged. Here, “replacement of the molten glass substrate” means that a molten glass having a certain composition is replaced with a molten glass having a different composition. The “raw material batch” is a glass raw material and / or glass cullet prepared so as to have a predetermined glass composition.
上記方法によれば、溶融炉の下流側といった通常生産時には利用しない投入位置から素地替え用の異種原料バッチを投入することが可能になる。このため最適な位置から素地替え用の異種原料バッチを投入することが可能になる。また通常生産時に使用する原料投入口の位置を決定する際に、素地替え時の投入を考慮する必要がなくなることから、通常生産に最適な位置に原料投入口を設けることができる。 According to the above-described method, it is possible to charge a different raw material batch for changing the substrate from a charging position that is not used during normal production, such as the downstream side of the melting furnace. For this reason, it becomes possible to introduce a different raw material batch for changing the substrate from an optimum position. In addition, when determining the position of the raw material input port used during normal production, it is not necessary to consider the input when changing the substrate, so that the raw material input port can be provided at the optimum position for normal production.
本発明においては、異種原料バッチの投入を、連続ガラス溶融炉の少なくとも一つの隅部から行うことが好ましい。「連続溶融炉の隅部」とは、平面視で、各コーナーを形成する２辺のうち短辺の１／３を半径として、溶融炉内部の各コーナーからこの半径内の領域を指す。「隅部から原料バッチを投入する」とは、隅部を構成する何れかの側壁の液面より上方に設けられた原料投入口から原料バッチを連続ガラス溶融炉の内部に供給することを意味する。「溶融ガラスとは異なる組成となるように調合された異種原料バッチ」とは、切り替え完了後の組成となるように調合された原料バッチに限定されるものではなく、切り替え後のガラスと溶融ガラスとの中間にある組成となるように調合された原料バッチも含む。 In the present invention, it is preferable to feed the different raw material batches from at least one corner of the continuous glass melting furnace. The “corner of the continuous melting furnace” refers to a region within the radius from each corner inside the melting furnace, with 1/3 of the short side of the two sides forming each corner as a radius in plan view. “Introducing a raw material batch from the corner” means that the raw material batch is supplied into the continuous glass melting furnace from the raw material inlet provided above the liquid level of any of the side walls constituting the corner. To do. “Different raw material batches prepared so as to have a composition different from that of molten glass” is not limited to raw material batches prepared so as to have a composition after completion of switching, but glass and molten glass after switching. Also included are raw material batches formulated to have a composition in between.
上記方法を採用すれば、素地替え時に残留し易い隅部付近の溶融ガラスを排出することが容易になる。 If the said method is employ | adopted, it will become easy to discharge | emit the molten glass of the corner vicinity which is easy to remain at the time of substrate change.
本発明においては、異種原料バッチの投入を、連続ガラス溶融炉の下流側から行うことが好ましい。 In the present invention, it is preferable to input the different raw material batches from the downstream side of the continuous glass melting furnace.
上記方法を採用すれば、通常は原料投入口を配置しない下流側の隅部付近の溶融ガラスを排出することが可能になる。 If the said method is employ | adopted, it will become possible to discharge | emit the molten glass of the corner vicinity of the downstream which does not arrange | position a raw material inlet normally.
本発明においては、溶融ガラスを排出して液面レベルを低下させた後、異種原料バッチを投入することが好ましい。この場合においては、溶融ガラスの排出による液面レベルの低下と、異種原料バッチの投入による液面レベルの上昇を複数回繰り返すことが望ましい。 In the present invention, it is preferable to introduce the different raw material batches after discharging the molten glass and lowering the liquid level. In this case, it is desirable to repeat the decrease in the liquid level due to the discharge of the molten glass and the increase in the liquid level due to the introduction of the different raw material batches a plurality of times.
本発明においては、溶融ガラスの排出を、連続ガラス溶融炉の隅部に設けられた素地抜き出し口から行うことが好ましい。ここで「隅部に設けられた素地抜き出し口」とは、隅部を構成する何れかの側壁の炉底付近、又は隅部付近の炉底に設けられた素地抜き出し口を意味する。 In this invention, it is preferable to discharge | emit molten glass from the base outlet provided in the corner part of a continuous glass melting furnace. Here, the “substrate outlet provided at the corner” means a substrate outlet provided near the furnace bottom of any side wall constituting the corner or at the furnace bottom near the corner.
上記方法を採用すれば、素地替え時に残留し易い隅部の溶融ガラスを速やかに排出することができる。 If the said method is employ | adopted, the molten glass of the corner part which is easy to remain at the time of substrate replacement | exchange can be discharged | emitted rapidly.
本発明においては、素地抜き出し口が設けられた隅部とは別の隅部から異種原料バッチを投入することが好ましい。 In the present invention, it is preferable to feed the different raw material batch from a corner different from the corner provided with the base outlet.
上記方法を採用すれば、異種原料バッチを投入することによる溶融ガラスの押し出し効果を有効に活用することができる。 If the said method is employ | adopted, the extrusion effect of the molten glass by throwing in a different raw material batch can be utilized effectively.
本発明においては、溶融ガラスの排出と、異種原料バッチの投入を同時に行うことが可能である。この場合においては、上流側隅部から異種原料バッチを投入した後、下流側隅部から異種原料バッチの投入を開始することが望ましい。 In the present invention, it is possible to simultaneously discharge the molten glass and input a different raw material batch. In this case, it is desirable to start charging the different raw material batch from the downstream corner after charging the different raw material batch from the upstream corner.
上記方法を採用すれば、押し出し法を利用した溶融ガラスの素地替えを短時間で行うことができる。 If the said method is employ | adopted, the base material replacement | exchange of the molten glass using an extrusion method can be performed in a short time.
本発明の連続ガラス溶融炉は、上流側に設けられた原料投入口と、下流側に設けられた流出口と、加熱手段とを有する連続ガラス溶融炉であって、連続ガラス溶融炉の少なくとも一つの隅部に、原料バッチ投入口とは別に設けられた素地替え用原料投入口を設けたことを特徴とする。 The continuous glass melting furnace of the present invention is a continuous glass melting furnace having a raw material charging port provided on the upstream side, an outlet port provided on the downstream side, and a heating means, and is at least one of the continuous glass melting furnaces. It is characterized by providing a raw material changing raw material inlet provided separately from the raw material batch inlet at one corner.
上記構成の溶融炉を使用すれば、素地替え時に残留し易い隅部付近の溶融ガラスを排出することが容易になる。 If the melting furnace of the said structure is used, it will become easy to discharge | emit the molten glass of the corner vicinity which is easy to remain at the time of substrate replacement.
本発明においては、連続ガラス溶融炉の少なくとも一つの隅部に、素地抜き出し口を設けることが好ましい。この場合においては、素地抜き出し口が設けられた隅部には、素地替え用原料投入口が設けられていないことが望ましい。 In the present invention, it is preferable to provide a base outlet in at least one corner of the continuous glass melting furnace. In this case, it is desirable that a base material changing inlet is not provided at the corner where the base outlet is provided.
上記構成の溶融炉を採用すれば、素地替え時に残留し易い隅部付近の溶融ガラスを速やかに排出することができる。 If the melting furnace of the said structure is employ | adopted, the molten glass of the corner vicinity which is easy to remain at the time of substrate replacement | exchange can be discharged | emitted rapidly.
以下、本発明の実施例を説明する。ただし本発明は以下の実施形態に限定されるものではない。
（実施態様１）
まず、素地抜き出し口を有する連続ガラス溶融炉を用いた本発明の実施形態を説明する。図１は、連続ガラス溶融炉の内部を平面視した説明図である。
Examples of the present invention will be described below. However, the present invention is not limited to the following embodiments.
(Embodiment 1)
First, an embodiment of the present invention using a continuous glass melting furnace having a base outlet is described. FIG. 1 is an explanatory diagram viewed from above the inside of a continuous glass melting furnace.
連続ガラス溶融炉２０は、上流側側壁２１、左側壁２２、右側壁２３、下流側側壁２４、底壁２５及び天井（図示せず）で囲まれ、溶融ガラスを一定時間滞留可能な内部空間を有している。また上流側側壁２１の壁面には、図示しない原料供給手段と連通した複数の原料投入口２６ａ、２６ｂ、２６ｃが、下流側側壁２４の壁面には、図示しない成形手段へと通じる流出口２７がそれぞれ設けられている。さらに連続ガラス溶融炉２０には、バーナー、電極等の図示しない加熱手段が備えられている。なお原料投入口は必ずしも３箇所である必要はない。 The continuous glass melting furnace 20 is surrounded by an upstream side wall 21, a left side wall 22, a right side wall 23, a downstream side wall 24, a bottom wall 25 and a ceiling (not shown), and has an internal space in which the molten glass can stay for a certain period of time. Have. A plurality of raw material inlets 26a, 26b and 26c communicating with a raw material supply means (not shown) are provided on the wall surface of the upstream side wall 21, and an outlet 27 leading to a forming means (not shown) is provided on the wall surface of the downstream side wall 24. Each is provided. Further, the continuous glass melting furnace 20 is provided with heating means (not shown) such as a burner and an electrode. Note that there are not necessarily three raw material inlets.
本実施態様においては、さらに通常生産で使用する原料投入口２６ａ、２６ｂ、２６ｃとは別に、素地替え用原料投入口２８ａ、２８ｂ、２８ｃが設けられている。素地替え用原料投入口２８ａは、上流側側壁２１の左側壁２２に近い壁面に設けられており、素地替え用原料投入口２８ｂ、２８ｃは、右側壁２３の上流側側壁２１及び下流側側壁２４に近い壁面にそれぞれ設けられている。ここで各素地替え用原料投入口は、何れも図示しない原料供給手段と連通している。なお素地替え原料用投入口は、必ずしも３箇所である必要はないが、少なくとも下流側に１箇所以上設けられていることが好ましい。 In this embodiment, in addition to the raw material inlets 26a, 26b, and 26c used in normal production, raw material changing raw material inlets 28a, 28b, and 28c are provided. The base material changing inlet 28 a is provided on the wall surface of the upstream side wall 21 near the left side wall 22. The base material changing inlets 28 b and 28 c are provided on the upstream side wall 21 and the downstream side wall 24 of the right side wall 23. It is provided on the wall near each. Here, each raw material changing inlet is connected to a raw material supply means (not shown). In addition, although there are not necessarily three locations for the raw material replacement raw material, it is preferable that at least one location is provided on the downstream side.
また連続ガラス溶融炉２０の底壁２５には、左側壁２２と下流側側壁２４とで囲まれる隅部に、溶融ガラスを下方へ排出する素地抜き出し口２９が設けられている。素地抜き出し口２９は、通常は溶融ガラスが流出しないように、金属製、或いはセラミック製のキャップによって閉じられており、溶融ガラスを排出する必要があるときのみ、キャップを取り外して開口される。またキャップは高温に晒されることから、キャップ周囲に冷却装置を設けておくことができる。なお素地抜き出し口は、底壁ではなく、側壁の下部に設けることも可能である。なお本実施態様では、素地抜き出し口２９は１箇所としているが、複数の隅部に設けてもよい。この場合、素地替え効率の観点から、素地抜き出し口を設けた隅部には、素地替え原料用投入口を設置しないことが好ましい。 Further, the bottom wall 25 of the continuous glass melting furnace 20 is provided with a base outlet 29 for discharging the molten glass downward at a corner surrounded by the left side wall 22 and the downstream side wall 24. The base outlet 29 is normally closed with a metal or ceramic cap so that the molten glass does not flow out, and is opened by removing the cap only when the molten glass needs to be discharged. Further, since the cap is exposed to a high temperature, a cooling device can be provided around the cap. The base outlet may be provided not on the bottom wall but on the lower part of the side wall. In the present embodiment, the base material extraction port 29 is provided at one place, but it may be provided at a plurality of corners. In this case, from the viewpoint of substrate replacement efficiency, it is preferable not to install the substrate replacement raw material inlet at the corner provided with the substrate extraction port.
次に上記の連続ガラス溶融炉２０を用いて別組成のガラスに切り替えるには、以下の工程を有する素地抜き法を採用することができる。 Next, in order to switch to glass having a different composition using the continuous glass melting furnace 20 described above, a blanking method having the following steps can be employed.
第一の工程として、素地抜き出し口２９を開口し、溶融ガラスを素地抜き出し口２９から排出する。このとき連続ガラス溶融炉２０内の溶融ガラスを全て抜き出すことは長時間を要することから、本発明では溶融ガラスの液面がある程度のレベルまで低下すれば抜き出しを完了してよい。 As a first step, the substrate outlet 29 is opened, and the molten glass is discharged from the substrate outlet 29. At this time, since it takes a long time to extract all the molten glass in the continuous glass melting furnace 20, in the present invention, the extraction may be completed if the liquid level of the molten glass is lowered to a certain level.
第二の工程として、素地替え用原料投入口２８ａ、２８ｂ、２８ｃの少なくとも一つから、異種原料バッチを投入する。異種原料バッチの投入は、液面が通常生産時のレベルに達するまで続ける。 As a second step, a different raw material batch is charged from at least one of the raw material changing material input ports 28a, 28b, 28c. The introduction of the batch of different raw materials is continued until the liquid level reaches the normal production level.
第三の工程として、再び素地抜き出し口２９を開口する。これにより、異種原料バッチの投入によって隅部から追い出された溶融ガラス（素地ガラス）が素地抜き出し口２９から排出される。 As a third step, the substrate outlet 29 is opened again. As a result, the molten glass (base glass) expelled from the corner by the introduction of the different raw material batches is discharged from the base outlet port 29.
上記第二、第三の工程を繰り返して素地替えを完了させる。 The second and third steps are repeated to complete the substrate replacement.
素地替えが完了したと判断した時点で、原料の投入を素地替え用原料投入口２８ａ、２８ｂ、２８ｃから、通常の原料投入口２６ａ、２６ｂ、２６ｃに戻し、通常生産を開始する。 When it is determined that the substrate replacement has been completed, the input of the raw material is returned from the substrate replacement raw material input ports 28a, 28b, and 28c to the normal raw material input ports 26a, 26b, and 26c, and normal production is started.
なお上記の素地替え方法に代えて、素地抜き出し口２９からの溶融ガラスの排出と、素地替え用原料投入口２８ａ、２８ｂ、２８ｃ（の少なくとも一つ）からの異種原料バッチの投入を同時に行う押し出し法を採用してもよいことは言うまでもない。また場合によっては、通常生産で使用する原料投入口２６ａ、２６ｂ、２６ｃ（の少なくとも一つ）を異種原料バッチの投入口として補助的に使用することも可能である。また、異種原料バッチの投入は、液面が通常生産時より低いレベルで停止してもよい。
（実施態様２）
本実施態様で使用する連続ガラス溶融炉３０は、素地抜き出し口を有さないこと、素地替え用原料投入口を上流側側壁３１の両隅部付近（３８ａ、３８ｂ）及び下流側側壁３４の両隅部付近（３８ｃ、３８ｄ）に設けたことを除き、実施態様１と同じ構成を有する。実施態様１共通する構成については説明を省略する。
In place of the substrate changing method described above, extrusion is performed in which molten glass is discharged from the substrate extraction port 29 and different raw material batches are input simultaneously from at least one of the substrate changing raw material input ports 28a, 28b, and 28c. It goes without saying that the law may be adopted. In some cases, the raw material inlets 26a, 26b, and 26c (at least one of them) used in normal production can be used as auxiliary inlets for different raw material batches. Moreover, the introduction of the different raw material batch may be stopped at a level where the liquid level is lower than that during normal production.
(Embodiment 2)
The continuous glass melting furnace 30 used in the present embodiment does not have a base material outlet, and the raw material input port for base replacement is located near both corners (38a, 38b) of the upstream side wall 31 and the downstream side wall 34. Except for being provided near the corners (38c, 38d), the configuration is the same as in the first embodiment. Descriptions of configurations common to Embodiment 1 are omitted.
本実施態様において、素地替え用原料投入口３８ａ、３８ｂ、３８ｃ、３８ｄの少なくとも１つは、上流側側壁３１又は下流側側壁３４の壁面ではなく、左側壁３２或いは右側壁３３の壁面に設けてもよい。また素地替え原料用投入口は、４箇所設けておくことが望ましいが、１〜３箇所であってもよい。なお、素地替え原料用投入口を２箇所以下とする場合、少なくとも１箇所は、素地替え効率の観点から、下流側の隅部に設けることが好ましい。 In this embodiment, at least one of the raw material changing inlets 38a, 38b, 38c, and 38d is provided not on the wall surface of the upstream side wall 31 or the downstream side wall 34 but on the wall surface of the left side wall 32 or the right side wall 33. Also good. Moreover, although it is desirable to provide the raw material replacement raw material input ports in four places, it may be in one to three places. In addition, when making the raw material replacement | exchange raw material input port into 2 places or less, it is preferable to provide at least 1 place in the corner of a downstream side from a viewpoint of substrate replacement efficiency.
次に上記の連続ガラス溶融炉３０を用いて別組成のガラスに切り替えるに当り、以下の工程を有する押し出し法を採用した。 Next, when switching to another glass composition using the continuous glass melting furnace 30 described above, an extrusion method having the following steps was adopted.
第一の工程として、流出口３７から溶融ガラスを排出する。また溶融ガラスの排出と同時に、上流側の隅部にある素地替え用原料投入口３８ａ、３８ｂの少なくとも１つから、異種原料バッチを投入する。異種原料バッチを上流側の隅部から投入すると、上流側隅部に滞留しがちな溶融ガラス（素地ガラス）を下流側に追い出し易くなる。 As a first step, the molten glass is discharged from the outlet 37. Simultaneously with the discharge of the molten glass, a different raw material batch is charged from at least one of the raw material changing raw material charging ports 38a and 38b in the upstream corner. When the different raw material batch is introduced from the corner on the upstream side, the molten glass (base glass) that tends to stay in the corner on the upstream side can be easily driven downstream.
第二の工程として、流出口３７からの溶融ガラスの排出を継続しながら、下流側の隅部にある素地替え用原料投入口３８ｃ、３８ｄの少なくとも１つからの異種原料バッチ投入を開始する。このとき、上流側からの異種バッチの投入は停止しても良いし、継続してもよい。下流側からの異種原料バッチの投入を開始すると、下流側隅部に滞留しがちな溶融ガラス（素地ガラス）を追い出し易くなる。 As the second step, while continuing the discharge of the molten glass from the outlet 37, the introduction of the different raw material batch from at least one of the raw material changing raw material inlets 38c and 38d at the downstream corner is started. At this time, the introduction of the different batches from the upstream side may be stopped or continued. When the introduction of different raw material batches from the downstream side is started, it becomes easy to expel molten glass (base glass) that tends to stay in the downstream corner.
なお上記工程では、上流側の異種原料バッチの投入開始後に下流側の異種原料バッチを投入したが、上流側及び下流側の投入開始時期を同時にしても差し支えない。また必要に応じて、通常生産で使用する原料投入口３６ａ、３６ｂ、３６ｃ（の少なくとも一つ）を異種原料バッチの投入口として補助的に使用することも可能である。 In the above process, the downstream heterogeneous raw material batch is introduced after the upstream heterogeneous raw material batch is started, but the upstream and downstream charging start timings may be simultaneously set. If necessary, the raw material input ports 36a, 36b, 36c (at least one) used in normal production can be used as auxiliary input ports for different types of raw material batches.
２０、３０ 連続ガラス溶融炉
１１、２１、３１ 上流側側壁
１２、２２、３２ 左側壁
１３、２３、３３ 右側壁
１４、２４、３４ 下流側側壁
１５、２５、３５ 底壁
１６、２６ａ、２６ｂ、２６ｃ、３６ａ、３６ｂ、３６ｃ 原料投入口
２７、３７ 流出口
１８ａ、１８ｂ、２８ａ、２８ｂ、２８ｃ、３８ａ、３８ｂ、３８ｃ、３８ｄ 素地替え用原料投入口
１９、２９ 素地抜き出し口
20, 30 Continuous glass melting furnace 11, 21, 31 Upstream side wall 12, 22, 32 Left side wall 13, 23, 33 Right side wall 14, 24, 34 Downstream side wall 15, 25, 35 Bottom wall 16, 26a, 26b, 26c, 36a, 36b, 36c Raw material inlet 27, 37 Outlet 18a, 18b, 28a, 28b, 28c, 38a, 38b, 38c, 38d Substrate changing raw material inlet 19, 29 Raw material outlet
Claims (12)
The continuous glass melting furnace according to claim 11, wherein a raw material charging port for substrate replacement is not provided at a corner portion where the substrate extraction port is provided.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE112018001692T5 (en) | 2017-03-29 | 2019-12-19 | Mitsubishi Heavy Industries, Ltd. | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING PROCESS AND PROGRAM |
| KR20200016925A (en) * | 2017-06-06 | 2020-02-17 | 코닝 인코포레이티드 | How to readjust a glass manufacturing system |
| JP2021535058A (en) * | 2018-08-22 | 2021-12-16 | コーニング インコーポレイテッド | Manufacturing method of glass articles |
| JP2021195289A (en) * | 2020-06-17 | 2021-12-27 | 日本電気硝子株式会社 | Method of manufacturing glass article |
| WO2022255040A1 (en) * | 2021-05-31 | 2022-12-08 | 日本電気硝子株式会社 | Method for producing glass article |
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| WO2022075016A1 (en) * | 2020-10-08 | 2022-04-14 | Ａｇｃ株式会社 | Glass melting device, glass production method, and molten glass base material exchange method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE112018001692T5 (en) | 2017-03-29 | 2019-12-19 | Mitsubishi Heavy Industries, Ltd. | INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING PROCESS AND PROGRAM |
| KR20200016925A (en) * | 2017-06-06 | 2020-02-17 | 코닝 인코포레이티드 | How to readjust a glass manufacturing system |
| JP2020522455A (en) * | 2017-06-06 | 2020-07-30 | コーニング インコーポレイテッド | Readjustment method for glass manufacturing system |
| JP7084948B2 (en) | 2017-06-06 | 2022-06-15 | コーニング インコーポレイテッド | How to readjust the glass manufacturing system |
| KR102514358B1 (en) | 2017-06-06 | 2023-03-29 | 코닝 인코포레이티드 | How to Recalibrate Your Glass Manufacturing System |
| JP2021535058A (en) * | 2018-08-22 | 2021-12-16 | コーニング インコーポレイテッド | Manufacturing method of glass articles |
| JP2021195289A (en) * | 2020-06-17 | 2021-12-27 | 日本電気硝子株式会社 | Method of manufacturing glass article |
| JP7437612B2 (en) | 2020-06-17 | 2024-02-26 | 日本電気硝子株式会社 | Method for manufacturing glass articles |
| WO2022255040A1 (en) * | 2021-05-31 | 2022-12-08 | 日本電気硝子株式会社 | Method for producing glass article |
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