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WO2003018489A1 - Channel for the running and conditioning of a molten glass - Google Patents

Channel for the running and conditioning of a molten glass Download PDF

Info

Publication number
WO2003018489A1
WO2003018489A1 PCT/EP2002/008859 EP0208859W WO03018489A1 WO 2003018489 A1 WO2003018489 A1 WO 2003018489A1 EP 0208859 W EP0208859 W EP 0208859W WO 03018489 A1 WO03018489 A1 WO 03018489A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass melt
channel
conditioning
basin
molten glass
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.)
Ceased
Application number
PCT/EP2002/008859
Other languages
German (de)
French (fr)
Inventor
Erhard Dick
Erich Fischer
Roland Fuchs
Markus Riedl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott AG
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
Schott Glaswerke AG
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 Carl Zeiss AG, Schott Glaswerke AG filed Critical Carl Zeiss AG
Publication of WO2003018489A1 publication Critical patent/WO2003018489A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
    • C03B5/262—Drains, i.e. means to dump glass melt or remove unwanted materials
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/02—Forehearths, i.e. feeder channels
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/02—Forehearths, i.e. feeder channels
    • C03B7/06—Means for thermal conditioning or controlling the temperature of the glass
    • C03B7/07—Electric means

Definitions

  • the present invention relates to a channel and a method for guiding and conditioning a glass melt with a floor drain which has a basin in the lower region.
  • streaks occur in the melting tank due to the contact between the tank material and the glass melt.
  • a streak is a contamination in the glass melt.
  • the density of the streaks can be larger or smaller than the glass melt. So far, attempts have been made to remove the streaks by stirring. It has been shown that, in particular, specifically heavier streaks, such as streaks containing ZrO 2 , cannot be substantially eliminated by stirring.
  • the streaks are guided with the glass melt from the melting trough over the feeder channel to the feeder head and are visible in the product.
  • the object of the present invention is to provide a device and a method for reducing the streaks in the glass product.
  • the object is achieved by a device for guiding and conditioning a glass melt, with a gutter with a floor drain which has a basin in the lower region.
  • the glass melt is guided over a channel, with streaks with a higher density settling in the basin.
  • the deposited contamination is removed by at least one floor drain.
  • a preferred embodiment of the invention is a device for guiding and conditioning a glass melt, the basin having a triangular geometry.
  • the pelvis tapers towards the bottom.
  • the heavy streaks sink and separate in the taper.
  • the melt enriched with streaks in the lower area is drawn off through the floor drain if necessary.
  • a further preferred embodiment of the invention is a device for guiding and conditioning a glass melt, the electrodes for thermal mix conditioning in the gutter are arranged asymmetrically. With this measure according to the invention, the formation of thermally formed streaks is reduced.
  • the object of the invention is further achieved by a method for low-streaking production of a glass, the glass melt being guided in the trough with a basin, heavier components settling in the basin and being discontinuously drawn off through a floor drain and the glass melt being fed to the feeder head.
  • the use of a basin for separating heavier constituents in the glass melt in a feeder channel is provided.
  • FIG. 1 a feeder channel in longitudinal section
  • FIG. 2 a feeder channel in cross section
  • FIG. 3 a plan view of a feeder channel.
  • FIG. 1 the basin (3) according to the invention in a feeder channel (1) is shown as an example.
  • the basin (3) has at least one floor drain (2).
  • the glass melt passes through the feeder channel (1), and heavier components of the glass melt can settle in the basin (3).
  • Fig. 2 the geometry of the feeder (1) and the basin (3) is shown.
  • 3 shows the asymmetrical arrangement of the electrodes (4).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to a channel for the running and conditioning of a molten glass, with a bottom drain and a pan in the lower region thereof. The invention further relates to a method for the streak-free preparation of a glass, whereby the molten glass is run into the feed channel with a pan, heavy components settle in the pan and are intermittently drawn off through a bottom drain and the molten glass is run to the feeder head. The invention also relates to the use of a pan for the separation of heavy components in the molten glass in a feed channel.

Description

Rinne zum Führen und Konditionieren einer Glasschmelze Channel for guiding and conditioning a glass melt

Die vorliegende Erfindung betrifft Rinne und ein Verfahren zum Führen und Konditionieren einer Glasschmelze, mit Bodenablauf, die im unteren Bereich ein Becken aufweist.The present invention relates to a channel and a method for guiding and conditioning a glass melt with a floor drain which has a basin in the lower region.

Bei der Glasschmelze entstehen in der Schmelzwanne Schlieren bedingt durch den Kontakt zwischen Wannenmaterial und Glasschmelze. Eine Schliere ist in der Glasschmelze eine Verunreinigung. Die Dichte der Schlieren kann größer oder kleiner sein als die Glasschmelze. Bisher wurde versuch die Schlieren durch Rühren zu beseitigen. Es hat sich gezeigt, dass insbesondere spezifisch schwererere Schlieren, wie Zr02-haltige Schlieren, durch Rühren nicht wesentlich beseitigt werden können. Die Schlieren werden mit der Glasschmelze aus der Schmelzwanne über die Speiserrinne zum Speiserkopf geführt und sind im Produkt sichtbar.With glass melting, streaks occur in the melting tank due to the contact between the tank material and the glass melt. A streak is a contamination in the glass melt. The density of the streaks can be larger or smaller than the glass melt. So far, attempts have been made to remove the streaks by stirring. It has been shown that, in particular, specifically heavier streaks, such as streaks containing ZrO 2 , cannot be substantially eliminated by stirring. The streaks are guided with the glass melt from the melting trough over the feeder channel to the feeder head and are visible in the product.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine Vorrichtung und ein Verfahren zur Minderung der Schlieren im Glasprodukt bereitzustellen.The object of the present invention is to provide a device and a method for reducing the streaks in the glass product.

Die Aufgabe wird durch eine Vorrichtung zum Führen und Konditionieren einer Glasschmelze, mit eine Rinne mit Bodenablauf, die im unteren Bereich ein Becken aufweist, gelöst. Die Glasschmelze wird erfindungsgemäß über eine Rinne geführt, wobei sich Schlieren mit höherer Dichte im Becken absetzen. Die abgesetzte Verunreinigung wird durch mindestens einen Bodenablauf abgezogen. Es hat sich überraschenderweise gezeigt, dass die Glasschmelze wirkungsvoll weitgehend von schwereren Schlieren befreit werden kann.The object is achieved by a device for guiding and conditioning a glass melt, with a gutter with a floor drain which has a basin in the lower region. According to the invention, the glass melt is guided over a channel, with streaks with a higher density settling in the basin. The deposited contamination is removed by at least one floor drain. Surprisingly, it has been shown that the glass melt can be effectively freed from heavier streaks to a large extent.

Eine bevorzugte Ausgestaltung der Erfindung ist eine Vorrichtung zum Führen und Konditionieren einer Glasschmelze, wobei das Becken eine dreieckige Geometrie aufweist. Das Becken verjüngt sich nach unten hin. Die schweren Schlieren sinken ab und scheiden sich in der Verjüngung ab. Die so mit Schlieren im unteren Bereich angereicherte Schmelze wird bei Bedarf durch den Bodenablauf abgezogen.A preferred embodiment of the invention is a device for guiding and conditioning a glass melt, the basin having a triangular geometry. The pelvis tapers towards the bottom. The heavy streaks sink and separate in the taper. The melt enriched with streaks in the lower area is drawn off through the floor drain if necessary.

Eine weitere bevorzugte Ausgestaltung der Erfindung ist eine Vorrichtung zum Führen und Konditionieren einer Glasschmelze, wobei die Elektroden zum ther- mischen Konditionieren in der Rinne asymmetrisch angeordnet sind. Mit dieser erfindungsgemäßen Maßnahme wird die Bildung von thermisch gebildeten Schlieren gemindert.A further preferred embodiment of the invention is a device for guiding and conditioning a glass melt, the electrodes for thermal mix conditioning in the gutter are arranged asymmetrically. With this measure according to the invention, the formation of thermally formed streaks is reduced.

Die Aufgabe der Erfindung wird weiter durch ein Verfahren zur schlierenarmen Fertigung eines Glases gelöst, wobei die Glasschmelze in der Rinne mit Becken geführt wird, schwerere Bestandteile sich im Becken absetzen und diskontinuierlich durch einen Bodenablauf abgezogen werden und die Glasschmelze zum Speiserkopf geführt wird.The object of the invention is further achieved by a method for low-streaking production of a glass, the glass melt being guided in the trough with a basin, heavier components settling in the basin and being discontinuously drawn off through a floor drain and the glass melt being fed to the feeder head.

Erfindungsgemäß ist die Verwendung eines Beckens zum Abtrennen von schwereren Bestandteilen in der Glasschmelze in einer Speiserrinne vorgesehen.According to the invention, the use of a basin for separating heavier constituents in the glass melt in a feeder channel is provided.

Die Erfindung wird anhand einer Zeichnung näher erläutert. Die Zeichnung enthält Fig. 1 , Fig. 2 und Fig. 3. Es zeigt: Fig. 1 : eine Speiserrinne im Längsschnitt, Fig. 2: eine Speiserrinne im Querschnitt, Fig. 3 eine Draufsicht auf eine Speiserrinne.The invention is explained in more detail with reference to a drawing. The drawing contains FIGS. 1, 2 and 3. It shows: FIG. 1: a feeder channel in longitudinal section, FIG. 2: a feeder channel in cross section, FIG. 3 a plan view of a feeder channel.

In Fig. 1 wird das erfindungsgemäße Becken (3) in einer Speiserrinne (1 ) beispielhaft dargestellt. Das Becken (3) weist mindestens einen Bodenablauf (2) auf. Die Glasschmelze durchläuft die Speiserrinne (1 ) wobei sich schwerere Bestandteile der Glasschmelze im Becken (3) absetzen können. In Fig. 2 wird die Geometrie der Speiserinne (1 ) und des Beckens (3) gezeigt. In Fig. 3 ist die a- symmetrische Anordnung der Elektroden (4) dargestellt. In Fig. 1 the basin (3) according to the invention in a feeder channel (1) is shown as an example. The basin (3) has at least one floor drain (2). The glass melt passes through the feeder channel (1), and heavier components of the glass melt can settle in the basin (3). In Fig. 2 the geometry of the feeder (1) and the basin (3) is shown. 3 shows the asymmetrical arrangement of the electrodes (4).

Claims

P A T E N T A N S P R Ü C H E PATENT CLAIMS 1. Vorrichtung zum Führen und Konditionieren einer Glasschmelze, mit eine Rinne (1) mit Bodenablauf (2), die im unteren Bereich ein Becken (3) aufweist.1. Device for guiding and conditioning a glass melt, with a channel (1) with floor drain (2), which has a basin (3) in the lower region. 2. Vorrichtung zum Führen und Konditionieren einer Glasschmelze nach Anspruch 1 , wobei das Becken (3) eine dreieckige Geometrie aufweist.2. Device for guiding and conditioning a glass melt according to claim 1, wherein the basin (3) has a triangular geometry. 3. Vorrichtung zum Führen und Konditionieren einer Glasschmelze nach Anspruch 1 oder 2, wobei die Elektroden (4) zum thermischen Konditionieren in der Rinne (1 ) asymmetrisch angeordnet sind.3. Device for guiding and conditioning a glass melt according to claim 1 or 2, wherein the electrodes (4) for thermal conditioning in the channel (1) are arranged asymmetrically. 4. Verfahren zur schlierenarmen Fertigung eines Glases, wobei die Glasschmelze in der Rinne (1 ) mit Becken (3) geführt wird, schwerere Bestandteile sich im Becken (3) absetzen und diskontinuierlich durch einen Bodenablauf (2) abgezogen werden und Glasschmelze zum Speiserkopf geführt wird.4. Process for low-streak production of a glass, the glass melt being guided in the trough (1) with a basin (3), heavier components settling in the basin (3) and being discontinuously drawn off through a floor drain (2) and glass melt being fed to the feeder head becomes. 5. Verfahren nach Anspruch 4, wobei die Glasschmelze in der Rinne (1 ) mit asymmetrisch angeordneten Elektroden geführt wird.5. The method according to claim 4, wherein the glass melt is guided in the channel (1) with asymmetrically arranged electrodes. 6. Verwendung eines Beckens (2) zum Abtrennen von schwereren Bestandteilen in der Glasschmelze in einer Speiserrinne (1 ). 6. Use of a basin (2) for separating heavier components in the glass melt in a feeder channel (1).
PCT/EP2002/008859 2001-08-24 2002-08-08 Channel for the running and conditioning of a molten glass Ceased WO2003018489A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001141587 DE10141587B4 (en) 2001-08-24 2001-08-24 Channel for guiding and conditioning a glass melt and method for streak-poor production of a glass
DE10141587.7 2001-08-24

Publications (1)

Publication Number Publication Date
WO2003018489A1 true WO2003018489A1 (en) 2003-03-06

Family

ID=7696527

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/008859 Ceased WO2003018489A1 (en) 2001-08-24 2002-08-08 Channel for the running and conditioning of a molten glass

Country Status (2)

Country Link
DE (1) DE10141587B4 (en)
WO (1) WO2003018489A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2382739C1 (en) * 2006-12-07 2010-02-27 Бетайлигунген Зорг Гмбх Унд Ко. Кг Method and device for tapping molten glass from discharge channels

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1201655A (en) * 1967-08-17 1970-08-12 Elemelt Ltd Improvements relating to methods of and furaces for supplying molten glass
JPS6325227A (en) * 1986-07-17 1988-02-02 Toshiba Glass Co Ltd Apparatus for separating and removing different kind of glass
EP0393882A2 (en) * 1989-04-17 1990-10-24 Corning Incorporated Method and apparatus for processing molten glass
US5022910A (en) * 1989-04-06 1991-06-11 Societe Europeenne Des Produits Refractaires Feeder trough for transferring molten glass from a furnace to a forming station
DE19515431A1 (en) * 1995-04-26 1996-10-31 Walter Lindner Feeder channel for liquid glass
JPH11255520A (en) * 1998-03-10 1999-09-21 Nippon Electric Glass Co Ltd Forehearth
US5961686A (en) * 1997-08-25 1999-10-05 Guardian Fiberglass, Inc. Side-discharge melter for use in the manufacture of fiberglass
DE19935664A1 (en) * 1999-07-29 2000-08-17 Sorg Gmbh & Co Kg Glass feeder has wide collection chamber above a drainage opening for difficultly miscible bottom glass to reduce formation of 'cat scratches' and other flaws in finished glass products

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050211A (en) * 1934-10-26 1936-08-04 Hartford Empire Co Glass feeding forehearth

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1201655A (en) * 1967-08-17 1970-08-12 Elemelt Ltd Improvements relating to methods of and furaces for supplying molten glass
JPS6325227A (en) * 1986-07-17 1988-02-02 Toshiba Glass Co Ltd Apparatus for separating and removing different kind of glass
US5022910A (en) * 1989-04-06 1991-06-11 Societe Europeenne Des Produits Refractaires Feeder trough for transferring molten glass from a furnace to a forming station
EP0393882A2 (en) * 1989-04-17 1990-10-24 Corning Incorporated Method and apparatus for processing molten glass
DE19515431A1 (en) * 1995-04-26 1996-10-31 Walter Lindner Feeder channel for liquid glass
US5961686A (en) * 1997-08-25 1999-10-05 Guardian Fiberglass, Inc. Side-discharge melter for use in the manufacture of fiberglass
JPH11255520A (en) * 1998-03-10 1999-09-21 Nippon Electric Glass Co Ltd Forehearth
DE19935664A1 (en) * 1999-07-29 2000-08-17 Sorg Gmbh & Co Kg Glass feeder has wide collection chamber above a drainage opening for difficultly miscible bottom glass to reduce formation of 'cat scratches' and other flaws in finished glass products

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 230 (C - 508) 29 June 1988 (1988-06-29) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 14 22 December 1999 (1999-12-22) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2382739C1 (en) * 2006-12-07 2010-02-27 Бетайлигунген Зорг Гмбх Унд Ко. Кг Method and device for tapping molten glass from discharge channels

Also Published As

Publication number Publication date
DE10141587A1 (en) 2003-03-13
DE10141587B4 (en) 2005-04-07

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