WO2012091130A1 - Réservoir de clarification, four de fusion de verre, procédé de production de verre liquide, procédé de production d'article en verre et dispositif de production d'article en verre - Google Patents

Réservoir de clarification, four de fusion de verre, procédé de production de verre liquide, procédé de production d'article en verre et dispositif de production d'article en verre Download PDF

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Publication number
WO2012091130A1
WO2012091130A1 PCT/JP2011/080490 JP2011080490W WO2012091130A1 WO 2012091130 A1 WO2012091130 A1 WO 2012091130A1 JP 2011080490 W JP2011080490 W JP 2011080490W WO 2012091130 A1 WO2012091130 A1 WO 2012091130A1
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WO
WIPO (PCT)
Prior art keywords
cover
plate
molten glass
clarification tank
side wall
Prior art date
Application number
PCT/JP2011/080490
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English (en)
Japanese (ja)
Inventor
整 長野
清太 宮崎
Original Assignee
旭硝子株式会社
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 旭硝子株式会社 filed Critical 旭硝子株式会社
Priority to JP2012551058A priority Critical patent/JPWO2012091130A1/ja
Publication of WO2012091130A1 publication Critical patent/WO2012091130A1/fr

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    • 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
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/43—Use of materials for furnace walls, e.g. fire-bricks
    • 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
    • C03B5/04—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces
    • 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
    • C03B5/183—Stirring devices; Homogenisation using thermal means, e.g. for creating convection currents
    • C03B5/185—Electric means
    • 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

Definitions

  • the present invention relates to a clarification tank provided with an inner surface cover in a flow path of molten glass defined by a bottom wall portion and a side wall portion, a glass melting furnace provided with the same, a method for manufacturing molten glass, a method for manufacturing glass products, and glass products It relates to a manufacturing apparatus.
  • a glass production apparatus provided with a melting tank, a clarification tank, and a molding apparatus is used, a glass raw material is melted in the melting tank, and the obtained molten glass is defoamed in the clarification tank,
  • a float method is known in which a uniform molten glass with a small amount of glass is sent to a forming apparatus equipped with a float bath to form a glass plate.
  • a flow path of molten glass is formed in a clarification tank used in the float process, and this flow path is generally configured by assembling a plurality of refractories such as refractory bricks.
  • the temperature of the molten glass is as high as 1200 to 1500 ° C.
  • a refractory material such as a refractory brick
  • a part of the refractory material is partially used when used for a long time.
  • the refractory melts into the glass and flows out into the glass as a heterogeneous substrate, which becomes a defect.
  • a melting tank that melts batch materials to form molten glass, and a structure including a shallow molten glass channel connected to the melting tank.
  • a glass melting apparatus having a clarification tank and a homogenization tank connected to the clarification tank is known (for example, Patent Document 2).
  • the glass melting tank described in Patent Document 2 intends to apply a refractory containing alumina, silica, and zirconia to a portion in contact with the molten glass to provide a structure that can withstand erosion by high-temperature molten glass.
  • a glass melting facility that can withstand the erosion of molten glass even if the material of the refractory is slightly improved, and it is desired to provide a glass melting tank having a new structure that can withstand the erosion of molten glass. .
  • the temperature of the molten glass flowing through the clarification tank is set as high as possible under the conditions where re-foaming is not performed, thereby reducing the viscosity of the molten glass and reducing the viscosity. It operates so that foam can be surely removed from the molten glass in the clarification tank. That is, since the molten glass flow path of the clarification tank is in contact with a higher temperature molten glass, the refractory constituting the molten glass flow path is likely to be eroded, and the constituent elements of the refractory diffuse to the molten glass side.
  • the composition of the molten glass may be non-uniform.
  • Patent Document 1 and Patent Document 2 a refractory metal is used instead of the refractory according to the clarification tank, but only a part of the refractory is replaced, and the majority of the refractory is replaced with the refractory metal. There is no disclosure or suggestion of the specific method of the case.
  • the present invention prevents the erosion of the bottom wall portion and the side wall portion by the molten glass by disposing an inner surface cover that covers the bottom wall portion and the side wall portion constituting the molten glass flow path in the clarification tank in the glass manufacturing apparatus. It aims at providing the clarification tank which can provide the high quality molten glass which suppressed elution of the structural component of the refractory material which comprises a wall part and a side wall part, and the impurity mixing does not arise. Moreover, this invention aims at provision of the manufacturing method and manufacturing apparatus of a molten glass which can provide the high quality molten glass provided with the said clarification tank, and the manufacturing method of a molten glass product.
  • the present invention is a clarification tank provided with a molten glass flow path made of refractory bricks, wherein the clarification tank includes a bottom wall portion and side wall portions on both sides of the molten glass flow path, and the bottom wall portion and both sides.
  • An inner surface cover for covering the molten glass flow path side in the wall portion wherein the inner surface cover is composed of a plurality of cover assemblies arranged along a flow path direction of the molten glass, and the cover assembly is the bottom wall
  • a clarification tank comprising a bottom wall plate that covers a part, a side wall plate that covers the side wall part, and a first cover plate that covers a butting region between cover assemblies arranged along the flow path.
  • the fining tank of the present invention is formed with an ear extending from the end of the side wall plate toward the outside of the flow path at the end of the side wall plate on the downstream side of the flow path or the end of the flow path on the upstream side. It is preferred that The ear part can be expressed as overhang during English translation. It is preferable that the clarification tank of this invention joins through the joint part of a some refractory brick, the said side wall part is formed, and the said ear
  • the cover assembly is made of Mo (molybdenum), the upper end portion of the side wall plate protrudes above the liquid surface position of the molten glass, and the upper end portion is Pt, Pt alloy, or
  • the cover member is preferably covered with a heat-resistant ceramic cover member.
  • the cover assembly made of Mo (molybdenum) means a cover assembly made of Mo metal or Mo alloy, and means that contains 45 atomic% or more of Mo.
  • the Mo alloy examples include those containing La (lanthanum) and W (tungsten), and those containing ZrO 2 (zirconia oxide).
  • the cover assembly is made of Mo and the upper end position of the side wall plate is formed at a position lower than the liquid surface position of the molten glass.
  • the cover assembly includes a first plate assembly disposed on one of the left and right sides of the molten glass flow path, and a second plate disposed on the other of the left and right sides of the molten glass flow path. It is preferable to provide a plate assembly and a second cover plate that covers a butt region between the first plate assembly and the second plate assembly.
  • the first plate assembly and the second plate assembly each cover a bottom wall plate, a side wall plate, and a butted region of the bottom wall plate and the side wall plate, respectively.
  • the cover plate is preferably provided.
  • the clarification tank of the present invention preferably includes a fourth cover plate that covers the butting region between the second cover plate and the third cover plate in the butting region between the cover assemblies.
  • the side wall plate may be supported by a support that passes through the side wall plate and is attached to the outer side wall portion.
  • the clarification tank of the present invention includes a first clarification tank having a first molten glass flow path defined by a first bottom wall part and first side wall parts on both sides thereof, and the first clarification tank.
  • a second clarification tank having a second molten glass flow path defined by a second bottom wall and second sidewalls on both sides of the second bottom wall, and the second clarification tank.
  • At least any one of the first clarification tank, the second clarification tank, and the cooling tank includes a bottom wall portion and side wall portions on both sides of each of the molten glass flow paths.
  • an inner surface cover that covers the molten glass flow channel side in the bottom wall portion and both side wall portions, the inner surface cover is composed of a plurality of cover assemblies arranged along the flow channel direction of the molten glass,
  • a cover assembly includes a bottom wall plate that covers the bottom wall portion, a side wall plate that covers the side wall portion, and a first cover plate that covers a butting region between the cover assemblies disposed along the flow path. It is preferable to provide.
  • This invention provides the glass melting furnace which has a clarification tank in any one of the above, and is equipped with a melting tank in the upstream of the flow direction of the molten glass of the said clarification tank.
  • This invention provides the manufacturing method of the molten glass which has the process of fuse
  • the present invention includes a step of melting a glass raw material using the glass melting furnace described above to produce molten glass, a step of forming the molten glass, and a step of gradually cooling the glass after forming.
  • the present invention provides a glass product production apparatus comprising the glass melting furnace described above, a molding means for molding the molten glass produced by the glass melting furnace, and a slow cooling means for gradually cooling the glass after molding. provide.
  • an inner surface cover is constituted by a plurality of cover assemblies, and the bottom surface and the inner surface of the molten glass flow path are covered with the inner surface cover. Therefore, erosion of the bottom wall portion and the side wall portion can be suppressed.
  • the inner surface cover is disposed between the high-temperature molten glass flowing through the flow path and the bottom wall and side walls, impurities should be mixed directly from the bottom wall and side walls into the molten glass flowing through the flow path. Can be prevented. Therefore, bubbles can be removed without causing impurities in the clarification tank, and a high-quality molten glass having a uniform composition and no bubbles can be obtained.
  • the cover assembly can be stably supported by forming an ear portion at the end portion of the side wall plate and inserting and supporting the ear portion in the joint portion or slit portion of the refractory brick provided outside the side wall plate. Further, since the molten glass that is going to flow through the gap existing between the side wall portion constituting the flow path of the molten glass and the side wall plate of the cover assembly can be blocked by the ear portion of the side wall plate, The molten glass that is in contact with the glass and has a high possibility of impurities being mixed does not flow downstream of the clarification tank.
  • FIG. 1 is a lineblock diagram showing an example of the manufacture device of the glassware provided with the clarification tank concerning a 1st embodiment of the present invention.
  • FIG. 2 is a schematic plan view showing the main part of the manufacturing apparatus. 3 shows a cross-sectional structure of the clarification tank shown in FIG. 1, FIG. 3 (a) is a cross-sectional view, and FIG. 3 (b) is a partially enlarged cross-sectional view of the clarification tank.
  • FIG. 4 is a block diagram showing an example of an inner surface cover disposed inside the clarification tank.
  • FIG. 5 is a plan view showing an example of an inner surface cover arranged inside the clarification tank.
  • FIG. 6 is a partial cross-sectional view showing an example of an inner surface cover disposed in the clarification tank.
  • FIG. 1 is a lineblock diagram showing an example of the manufacture device of the glassware provided with the clarification tank concerning a 1st embodiment of the present invention.
  • FIG. 2 is a schematic plan view showing the main part of the manufacturing apparatus. 3 shows
  • FIG. 7 is an exploded perspective view showing an example of an inner surface cover arranged inside the clarification tank.
  • FIG. 8 is a flowchart showing an example of a manufacturing process of a glass product performed using the clarification tank.
  • FIG. 9 is a partial cross-sectional view showing an example of an inner surface cover arranged in the clarification tank of the second embodiment.
  • FIG. 10 is a fragmentary sectional view which shows the other example of the inner surface cover arrange
  • FIG. 11 is a perspective view which shows the other example of the inner surface cover arrange
  • FIG. 1 is a configuration diagram schematically showing one embodiment of a molten glass production apparatus provided with a clarification tank according to the present invention
  • FIG. 2 is a plan view of the main part of the apparatus.
  • the glass product manufacturing apparatus 1 of the present embodiment includes a melting tank 2 for melting a glass raw material to produce molten glass, a first clarification tank 3 sequentially installed on the downstream side of the melting tank 2, A second clarification tank 4, a cooling tank 5, and a molding device 6 are provided.
  • a molten glass clarification tank 7 is constituted by the first clarification tank 3, the second clarification tank 4, and the cooling tank 5, and a glass melting furnace is formed by the melting tank 2 and the clarification tank 7. 14 is configured.
  • the melting tank 2 of the present embodiment is provided with a glass raw material charging part (not shown) on one side and a connecting part to the first clarification tank 3 on the opposite side. It is provided as a tank for preparing molten glass by melting the charged glass raw material using a heating device such as a burner.
  • the burner provided in the melting tank 2 is attached to the side wall of the melting tank 2 in a horizontal direction and blows out the combustion flame. May be used, or an air-melting type burner in which a mixed powder material obtained by mixing glass raw material powders in a predetermined ratio is directly blown from the burner to form molten glass.
  • the first clarification tank 3 to which the melting tank 2 of the present embodiment is connected is elongated and has a substantially constant width in plan view, and has a depth approximately equal to the lateral width as shown in FIGS. And includes a bottom wall portion 3a, side wall portions 3b on both sides thereof, and a ceiling portion 3c.
  • a region defined by the bottom wall portion 3a and the side wall portions 3b on both sides of the first clarification tank 3 is a flow path R1 of molten glass, and a two-dot chain line GH in FIG. In this way, molten glass is supplied to the first clarification tank 3.
  • a plurality of electrodes 8 are erected on the bottom wall portion 3a of the first clarification tank 3 at a predetermined interval, and by controlling the amount of current applied to these electrodes 8, 8. Can be heated.
  • a plurality of refractory bricks are joined via joints to form a bottom wall portion 3a, a side wall portion 3b, and a ceiling portion 3c, and the shapes shown in FIGS. 1 and 2 as a whole. It is comprised so that it may become the general shape as a tank of.
  • the thickness of the firebrick which comprises the 1st clarification tank 3 is abbreviate
  • an upstream end side that is, an inlet side step part 3d raised one step from the bottom wall part 3a is formed on the melting tank 2 side, and in the first clarification tank 3, the downstream end side, That is, on the second clarification tank 4 side, a plurality of drain-out parts 3e for discharging the drain are formed in the width direction of the first clarification tank 3 so as to be lowered by one step from the bottom wall part 3a.
  • the inlet part 3f of the first clarification tank 3 is formed shallower than the other part of the first clarification tank 3 by the amount of the inlet-side step 3d.
  • the downstream end side of the first clarification tank 3 is partitioned by a partition wall 3g that rises vertically, and the first end portion of the partition wall 3g is connected to the first through a portion where the depth of the flow path R of the molten glass is reduced.
  • a second clarification tank 4 is connected.
  • the second clarification tank 4 is long and narrow in plan view, and is configured as a shallow tank as compared with the lateral width as shown in FIGS. 1 and 2, and includes a bottom wall portion 4a and side walls on both sides thereof. It is comprised from the part 4b and the ceiling part 4c. A region defined by the bottom wall portion 4a and the side wall portions 4b on both sides of the second clarification tank 4 serves as a flow path R2 for molten glass, and the two-dot chain line GH in FIG. 1 is the liquid surface position of the molten glass.
  • the molten glass G is supplied to the second clarification tank 4.
  • a plurality of refractory bricks are joined via joints to form a bottom wall part 4a, a side wall part 4b, and a ceiling part 4c, and the tank as shown in FIGS. 1, 2, and 3 as a whole. It is comprised so that it may become the general form. 1 and 2, the thickness of the refractory brick (refractory) constituting the second clarification tank 4 is abbreviated, only the outline of the tank is shown, and FIG. 3 shows the bottom wall 4a and the side wall as an example. 4b and the thickness of the refractory bricks that compose them.
  • the size of the refractory bricks constituting the bottom wall portion 4a and the side wall portion 4b is arbitrary, and the number and size of the refractory bricks to be applied can be freely selected according to the size of the bottom wall portion 4a and the side wall portion 4b. can do.
  • the bottom wall portion 4a and the side wall portion 4b shown in FIG. 3A may have a multilayer structure with a plurality of refractory bricks.
  • FIG. 3 for simplicity of explanation, only one refractory brick 4c constituting the bottom wall portion 4a is shown, and two refractory bricks constituting the side wall portion 4b are stacked in the height direction of the side wall portion 4b.
  • FIG. 3 for simplicity of explanation, only one refractory brick 4c constituting the bottom wall portion 4a is shown, and two refractory bricks constituting the side wall portion 4b are stacked in the height direction of the side wall portion 4b.
  • FIG. 3 for simplicity of explanation, only one refractory brick 4c constitu
  • the water cooling jacket 50 is provided in the outer side (back side) of the refractory brick 4e which comprises the upper end part of the side wall part 4b. Since the structure of the water-cooling jacket 50 is a known configuration, the detailed description is omitted and the detailed structure is also omitted in FIG. As an example, the water-cooling jacket 50 can employ a structure in which a circulation channel is constituted by an outgoing tube and a return tube, and cooling is performed by flowing cooling water through the circulation channel.
  • an upstream end side that is, a portion on the first clarification tank 3 side is formed with an inlet side step portion 4g raised by one step from the bottom wall portion 4a, and the inlet of the second clarification tank 4
  • the part 4f is formed shallower than the other part of the second clarification tank 4, and the bottom wall part 4b on the downstream end side in the second clarification tank 4 is connected to the cooling tank 5 with a constant depth.
  • the cooling tank 5 is elongated in plan view and has a substantially constant width, and is configured as a tank deeper than the second clarification tank 4, as shown in FIG. 1, and includes a bottom wall portion 5a, side wall portions 5b on both sides thereof, and a ceiling portion. 5c.
  • a region defined by the bottom wall portion 5a and the side wall portions 5b on both sides of the cooling tank 5 is a flow path R3 of molten glass, and a two-dot chain line GH in FIG. 1 is a liquid surface position of the molten glass.
  • Molten glass G is supplied to the cooling bath 5.
  • a discharge side step portion 5d is formed on the downstream end side of the cooling tank 5, and a molding device 6 is connected to the downstream side of the discharge side step portion 5d, and the flow path R4 formed shallow by the discharge side step portion 5d.
  • Molten glass G is supplied to the forming apparatus 6 from the downstream end.
  • symbol 9 shown in FIG. 2 shows the stirring apparatus provided in the inside of the cooling tank 5.
  • FIG. 1 a plurality of refractory bricks are joined via joints to form the bottom wall part 5a, the side wall part 5b, and the ceiling part 5c, and the overall shape of the tank as shown in FIGS. It is configured as follows. In FIGS. 1 and 2, the thickness of the refractory brick constituting the cooling tank 5 is abbreviated and only the outline of the tank is shown.
  • the inner surface cover 15 is formed to have a height and width so as to substantially surround the flow path R2 defined by the bottom wall part 4a and the side wall parts 4b, 4b of the second clarification tank 4.
  • the height of the second clarification tank 4 is set over almost the entire length and can surround the flow path R3 defined by the bottom wall part 5a and the side wall parts 5b and 5b of the cooling tank 5. It is preferable that the cooling tank 5 is formed over a substantially entire length.
  • the inner surface cover 15 of the present embodiment is configured by adding a plurality of cover assemblies 16 shown in FIG. 4 and subsequent figures in the length direction of the flow paths R2 and R3, and the second clarification tank 4 and the cooling tank. 5 is applied.
  • the inner surface cover 15 applied to the cooling tank 5 has an equivalent structure to the inner surface cover 15 applied to the second clarification tank 4, the explanation of the inner surface cover 15 described later is the second clarification.
  • the inner surface cover 15 provided for the tank 4 will be described in detail, and the inner surface cover 15 provided for the cooling tank 5 will not be described.
  • the forming apparatus 6 has a molten tin bed layer 10 (that is, a float bath containing molten tin in the float glass manufacturing apparatus) in a pool section defined by the bottom wall 6a and the peripheral wall 6b. It is provided, and the molten glass G is allowed to flow on the bed layer 10 to be spread, so that a plate-like glass can be formed.
  • a molten tin bed layer 10 that is, a float bath containing molten tin in the float glass manufacturing apparatus
  • the second clarification tank 4 is provided with an inner surface cover 15 for protecting the inner surfaces of the bottom wall portion 4a and the side wall portions 4b and 4c as shown in FIG.
  • This inner surface cover 15 is configured in detail as shown in FIGS.
  • the inner surface cover 15 of the present embodiment is formed with a height and a width so as to substantially surround the flow path R2 defined by the bottom wall portion 4a and the side wall portions 4b and 4b of the second clarification tank 4,
  • the clarification tank 4 is installed over almost the entire length.
  • FIG. 4 shows a state in which a plurality of cover assemblies 16 are added to form the inner surface cover 15, a planar structure in the same state is shown in FIG. 5, and a front structure in the same state is shown in FIG. 6.
  • FIG. 7 shows a state where is partially disassembled.
  • the cover assembly 16 of the present embodiment includes a first plate assembly 17 and a second plate that are disposed adjacent to the width direction of the second clarification tank 4 (direction orthogonal to the flow direction of the flow path R2).
  • the assembly 18 is mainly composed of a first cover plate 22 and a second cover plate 23 arranged around them.
  • the first plate assembly 17 and the second plate assembly 18, and the first cover plate 22 and the second cover plate 23 are all made of a heat-resistant metal plate material such as Mo, Pt, or PtRh alloy. Consists of.
  • the first plate assembly 17 can cover about half the width of the bottom wall portion 4a of the second clarification tank 4 (about half the width direction of the bottom wall portion 4a perpendicular to the flow direction of the flow path R).
  • a rectangular first bottom wall plate 20 that has a width and is elongated in the flow direction of the flow path R2, and a first side wall plate 21 that is erected along the long side on one side in the width direction.
  • the second plate assembly 18 has a width that can cover about half the width of the bottom wall portion 4a of the second clarification tank 4, and is a rectangular second bottom wall that is elongated in the flow direction of the flow path R2.
  • the plate 25 and the second side wall plate 26 erected along the long side on one side in the width direction of the bottom wall plate 25 are mainly configured.
  • a first cover plate 22 is provided so as to cover the butting region of the first plate assemblies 17 and 17 and the butting region of the second plate assemblies 18 and 18 arranged along the flow path R2. It has been.
  • the first cover plate 22 includes an L-shaped third cover plate 22 ⁇ / b> A covering the end of the first bottom wall plate 20 and the end of the first side wall plate 21, and the second bottom wall plate 25.
  • An L-shaped third cover plate 22B that covers the end portion and the end portion of the second side wall plate 26, and a fourth cover plate 24 that covers the end portion of the third cover plate 22A.
  • a rod-shaped joint member 28 is attached to a portion where the first side wall plate 21 is erected on the long side of the upper surface of the first bottom wall plate 20, and the bottom wall plate 20 and the side wall plate 21 are tapped. It is fixed with screws through the opened joint member 28.
  • the material of the joint member 28 and the screw can be exemplified by Mo.
  • the joint member 28 is formed slightly shorter than the entire length of the long side of the first bottom wall plate 20, and the joint member 28 extends outside the both ends of the joint member 28 in the first bottom wall plate 20. No corner 29 is formed.
  • the joint member 28 may be provided with a step by bending or cutting as long as it has a structure that can cover the gap between the plates.
  • the joint member 28 is formed slightly shorter than the overall length of the long side of the first bottom wall plate 20, and the joint member 28 does not extend outside the both ends of the joint member 28 in the first bottom wall plate 20. Corner portions 29 are formed.
  • Both the first side wall plate 21 and the second side wall plate 26 are formed at the same height. These side wall plates 21 and 26 are formed so that the upper ends thereof are lower than the liquid surface position GH of the molten glass flowing through the flow path R2. In other words, when the molten glass G flows along the flow path R2, both the first side wall plate 21 and the second side wall plate 26 are formed so as to be covered with the molten glass G as a whole. ing. This is to prevent this when the plates 21 and 26 are made of Mo, for example, and there is a risk of burning if the Mo is in contact with air at 500 to 600 ° C.
  • the ears 21a and 26a projecting toward the outside of the flow path R2 are formed at right angles to the plates 21 and 26, respectively.
  • the third cover plate 22A is composed of a bottom plate 22a formed by bending one plate material and a side plate 22b, and is formed in an L shape.
  • the third cover plate 22A has a corner portion 29 formed on the end side of the joint member 28 along a boundary portion between the bottom plate 22a and the side plate 22b, and a rivet or the like along the end portion of the first side wall plate 21.
  • the fixing tool 30 is attached. The number and size of rivets can be appropriately determined depending on the plate thickness.
  • the fixture 30 is made of a material equivalent to the refractory metal material constituting the plate assemblies 17 and 18.
  • the attachment position by the fixing tool 30 may be an arbitrary position. In FIG. 5, only one place is attached at a position where the side plate 22 b faces the first side wall plate 21.
  • the third cover plate 22A has about half of the width direction of the bottom plate 22a and the side plate 22b (about half of the width direction of each plate along the flow direction of the flow path R2) as the edge portion of the first bottom wall plate 20.
  • the first side wall plate 21 is covered with the edge portion, and the other half width is projected from the edge portion of the first bottom wall plate 20 and the edge portion of the first side wall plate 21 so as to protrude from the first side wall plate 21. It is attached to the end side of the plate 21.
  • the length of the bottom plate 22a along the width direction of the flow path R2 is formed slightly longer than the width of the first bottom wall plate 20 along the same direction, and extends in the depth direction of the flow path R2.
  • the height of the side plate 22b along is made equal to the height of the first side wall plate 21 along the same depth direction.
  • the third cover plate 22B includes a bottom plate 22c and side plates 22d, and is formed in an L shape.
  • the third cover plate 22B is installed along the boundary portion between the bottom plate 22c and the side plate 22d at the abutting portion between the second bottom wall plate 25 and the second side wall plate 26. More specifically, the third cover plate 22B covers about half of the width direction on the edge portion of the second bottom wall plate 25 and the edge portion of the second side wall plate 26, and the remaining half width. Is protruded from the end edge portion of the second bottom wall plate 25 and the end edge portion of the second side wall plate 26, and is attached to the second side wall plate 26 by a fixture 30 such as a rivet.
  • the length of the bottom plate 22c along the width direction of the flow path R2 is formed slightly shorter than the width of the second bottom wall plate 25 along the same direction, and the height of the side plate 22d along the depth direction of the flow path R2 is the same. The height is equal to the height of the second side wall plate 26 along the depth direction.
  • the second cover plate 23 is formed in an elongated rectangular shape having the same width as the third cover plates 22A and 22B, and covers about half of the width direction on the long side of the first bottom wall plate 20, and the remaining half. The degree is projected from the long side of the first bottom wall plate 20 and is attached to the first bottom wall plate 20 by a fixture 31 such as a rivet.
  • the total length of the long side of the second cover plate 23 is slightly shorter than the total length of the long side of the first bottom wall plate 20, and one end 23a side of the second cover plate 23 is connected to the bottom plate 22a. When extending along the side edge, the other end 23 a is disposed slightly inside the end of the first bottom wall plate 20. Therefore, the end portion 20 a of the first bottom wall plate 20 that is not covered with the second cover plate 23 is exposed outside the end portion 23 a of the second cover plate 23.
  • the fourth cover plate 24 is made of an L-shaped plate material in plan view including a square plate-like main body portion 24a and projecting portions 24b and 24c formed to extend on both sides thereof.
  • the fourth cover plate 24 is made of a refractory metal material equivalent to the cover plates 22A, 22B, and 23.
  • the fourth cover plate 24 is a corner portion of the rectangular first bottom wall plate 20, and is a fixture such as a rivet so as to cover the abutting portion between the third cover plate 22A and the second cover plate 23. 32 is attached.
  • the mounting direction of the fourth cover plate 24 is such that the protrusion 24b faces the width direction of the flow path R2 and away from the end of the third cover plate 22A, and the protrusion 24c is on the downstream side in the flow direction of the flow path R2. Is directed away from the second cover plate 23.
  • the first plate assembly 17 and the first plate assembly 18 described above are disposed so as to be adjacent to the left and right in the width direction of the flow path R2. As shown in FIG. 5, the first plate assembly 17 and the first plate assembly 18 are arranged such that the long side of the first bottom wall plate 20 and the long side of the second bottom wall plate 25 are adjacent to each other. It is installed on the bottom wall 4a of the flow path R2 with a gap D1 therebetween. Most of the gap D1 between the first plate assembly 17 and the first plate assembly 18 is covered with the second cover plate 23 in plan view. Further, the projecting portion 24b of the fourth cover plate 24 attached to the first plate assembly 17 is placed on the end portion of the bottom plate 22c of the third cover plate 22B adjacent thereto and the end portion of the bottom plate 22b. Is covered in plan view.
  • the gap D1 is provided for absorbing the expansion when the first bottom wall plate 20 and the second bottom wall plate 25 are thermally expanded in the width direction of the flow path R2 according to the temperature of the molten glass flowing through the flow path R2. It has been.
  • the cover assembly 16 can be configured by arranging the first plate assembly 17 and the second plate assembly 18 as described above, all the edge sides of the cover assembly 16 located on the downstream side of the flow path R2 are included. Can be covered with the first cover plate 22 in a plan view so that there is no gap, in other words, with the third cover plates 22A and 22B and the fourth cover plate 24.
  • a plurality of cover assemblies 16 are arranged and connected in the same direction along the flow direction of the flow path R ⁇ b> 2 to constitute the inner surface cover 15. More specifically, the third cover plates 22A and 22B and the fourth cover plate 24 are disposed at the downstream edge portion of any one cover assembly 16 along the flow path R2.
  • the other cover assembly 16 to be installed on the downstream side of the assembly 16 is also arranged in the same direction, and the upstream edge portion of the cover assembly 16 to be arranged on the downstream side is to be arranged on the upstream side.
  • a plurality of cover assemblies 16 are sequentially arranged in the flow direction of the flow path R ⁇ b> 2 by being fitted so as to be fitted into the downstream edge portion of the solid body 16.
  • the third cover plates 22A and 22B and the fourth cover plate 24 exist at the downstream edge of the upstream cover assembly 16, but the third cover plate 22A or 22B and the flow path are provided. Since there is a gap corresponding to one plate between the bottom wall portion 4a of R2 and between the fourth cover plate 24 and the side wall portion 4b, the cover assembly on the downstream side is utilized using these gaps.
  • the upstream edge portion of the solid 16 can be fitted and both can be faced to each other. When the cover assemblies 16 are engaged, a slight gap D2 is formed between the upstream cover assembly 16 and the downstream cover assembly 16 as shown in FIG.
  • a gap D ⁇ b> 2 is formed between the first bottom wall plate 20 of the upstream cover assembly 16 and the first bottom wall plate 20 of the downstream cover assembly 16, and the upstream cover assembly 16.
  • a gap D ⁇ b> 2 is formed between the second bottom wall plate 25 and the second bottom wall plate 25 of the downstream cover assembly 16.
  • the first side wall plate 21 and the second side wall plate 26 can be stably supported by the side wall portion 4b.
  • a slit 4h is provided on the flow path R2 side of the refractory brick 4d, and the ear portions 21a and 26a are inserted and supported in the slit 4h.
  • a structure may be adopted.
  • a bolt-shaped fixture made of a heat-resistant metal such as Mo or W (tang ten) so as to penetrate the refractory brick 4 d.
  • a structure may be adopted in which the side wall plates 21 and 26 of the cover assembly 16 are separately supported by installing 35 and fixing the fixture 35 through the necessary portions of the side wall plates 21 and 26.
  • the molten glass product manufactured using the glass manufacturing apparatus 1 of the present embodiment is a molded product such as a glass plate manufactured by a float method, a rollout method, a downdraw method, a glass bottle manufactured by a blow method, or the like. As long as there is, it is not limited in composition. Therefore, any of soda lime glass, mixed alkali glass, borosilicate glass, or non-alkali glass may be used. Moreover, the use of the manufactured glass product is not limited to architectural use or vehicle use, and examples include flat panel display use and other various uses.
  • soda-lime glass used for plate glass for buildings or vehicles, it is expressed in terms of mass percentage on the basis of oxide, SiO 2 : 65 to 75%, Al 2 O 3 : 0 to 3%, CaO: 5 to 15%, MgO: 0 to 15%, Na 2 O: 10 to 20%, K 2 O: 0 to 3%, Li 2 O: 0 to 5%, Fe 2 O 3 : 0 to 3%, TiO 2 : 0 to 5%, CeO 2 : 0 to 3%, BaO: 0 to 5%, SrO: 0 to 5%, B 2 O 3 : 0 to 5%, ZnO: 0 to 5%, ZrO 2 : 0 to 5 %, SnO 2 : 0 to 3%, SO 3 : 0 to 0.5%.
  • SiO 2 39 to 75%
  • Al 2 O 3 3 to 27%
  • B 2 O 3 0 to 20%
  • SrO: 0 to 20% BaO: 0 to 30% are preferable.
  • a mixed alkali glass used for a substrate for plasma display it is expressed in terms of mass percentage on the basis of oxide, and SiO 2 : 50 to 75%, Al 2 O 3 : 0 to 15%, MgO + CaO + SrO + BaO + ZnO: 6 to 24 %, Na 2 O + K 2 O: preferably 6 to 24%.
  • the first bottom wall plate 20, the first side wall plate 21, and the third The cover plate 22A and the fourth cover plate 24 are riveted and assembled as the first plate assembly 17 in the state shown in FIG.
  • the second bottom wall plate 25, the second side wall plate 26 and the third cover plate 22B are riveted and assembled as the second plate assembly 18 in the state shown in FIG.
  • a plurality of the first plate assembly 17 and the second plate assembly 18 are prepared and aligned in the direction shown in FIG. 7, and these are sequentially shown in the flow path R2 of the second clarification tank 4 as shown in FIGS.
  • the flow path R2 can be sequentially covered with the cover assembly 16.
  • the cover assembly 16 when a plurality of refractory bricks 4d for constituting the side wall portion 4b of the second clarification tank 4 are joined via the joint portion 4B to construct the side wall portion 4b, the ear portions 21a and 26a of each cover assembly 16 are provided.
  • the inner surface cover 15 can be constructed simultaneously with the construction of the second clarification tank 4 by constructing the second clarification tank 4 while being inserted into the joint portion 4B.
  • the cooling tank 5 a plurality of first plate assemblies 17 and second plate assemblies 18 are prepared and aligned in the direction shown in FIG. 7, and these are sequentially arranged in the flow path R 3 of the cooling tank 5.
  • the flow path R ⁇ b> 3 can be covered with the inner surface cover 15 by spreading and overlapping.
  • the inner surface cover 15 includes the bottom wall portion constituting the second molten glass flow channel of the second clarification tank, the side wall portions on both sides thereof, and the molten glass flow channel side in the bottom wall portion and both side wall portions.
  • the inner surface cover 15 covers the bottom wall part constituting the first molten glass flow path of the first clarification tank and the side wall parts on both sides thereof, and the molten glass flow path side in the bottom wall part and both side wall parts. It may be provided, or may be provided so as to cover only the bottom wall part constituting the cooling tank and the side wall parts on both sides thereof, and the molten glass flow path side in the bottom wall part and both side wall parts.
  • cover assemblies 16 and 16 are sequentially laid down with the cover plate 22 facing the downstream side of the flow paths R2 and R3 has been described, but the upstream side of the flow paths R2 and R3.
  • the cover assemblies 16 and 16 may be sequentially spread and arranged with the cover plate 22 facing toward each other, and the arrangement direction of the cover assembly 16 is not limited in the present invention.
  • a method of manufacturing a glass product using the glass product manufacturing apparatus 1 including the second clarification tank 4 and the cooling tank 5 provided with the inner surface cover 15 described above will be described below.
  • a glass raw material is melt
  • a step of melting the glass raw material in the melting tank 2 to form a molten glass is referred to as a glass melting step S1 as shown in FIG.
  • the temperature of the molten glass is adjusted to a high temperature in the range of about 1420 to 1510 ° C. by energizing and heating using the electrode 8 and clarified.
  • a high temperature in the range of about 1420 to 1510 ° C.
  • defoaming proceeds by the effect of the clarifying agent contained in the component of the molten glass G.
  • the viscosity of a molten glass falls by heating to the high temperature of this range, it becomes easy to remove a bubble.
  • the molten glass is guided to the second clarification tank 4 to further proceed with clarification treatment to defoam.
  • the first clarification tank 3 has a certain depth and is heated by energization with a plurality of electrodes 8.
  • the second clarification tank 4 since the second clarification tank 4 is shallow, it does not basically cause a return flow of the molten glass, and is constant along the second clarification tank 4 from the upstream side to the downstream side. Then, the molten glass is moved to the cooling tank 5 side.
  • the temperature of the second clarification tank 4 is about 1510 ° C. on the inlet side and about 1500 ° C. on the outlet side to promote clarification of the molten glass. Since the above-mentioned inner surface cover 15 is provided in the second clarification tank 4, the function and effect of the inner surface cover 15 can be obtained. Details of the function and effect will be described later.
  • the molten glass defoamed in the second clarification tank 4 is cooled in the cooling tank 5 from a temperature of about 1500 ° C. on the inlet side to a temperature of about 1200 ° C. on the outlet side.
  • the step of cooling and adjusting to the molding temperature range so as to be clarified in the first clarification tank 3 and the second clarification tank 4 and to form molten glass, as shown in FIG. This is referred to as S2.
  • the molten glass cooled to about 1200 ° C. in the cooling bath 5 is spread on the molten tin bed layer 10 of the float glass manufacturing apparatus in the molding apparatus 6 in the next step, and can be made into sheet glass.
  • the step of forming the sheet glass using the forming device 6 is referred to as a forming step S3 as shown in FIG.
  • molding plate-shaped glass is not restricted to the float glass manufacturing method which was illustrated, The roll-out method and the down draw method may be sufficient.
  • a glass product G6 of interest can be obtained as shown in FIG. 8 by performing a slow cooling step S4 of slowly cooling the sheet glass to a temperature close to room temperature and a cutting step S5 of cutting to a desired size. .
  • the inner surface cover 15 made of a heat-resistant metal is provided in the second clarification tank 4 and the cooling tank 5.
  • the inner surface cover 15 covers the inner surface side of the bottom wall portion 4a and the side wall portion 4b constituting the flow path R2 of the molten glass G, and thus constitutes the bottom wall portion 4a and the side wall portion 4b. Direct contact between the refractory brick and the molten glass G can be reduced as much as possible, and the constituent components of the refractory brick can be prevented from being eluted to the molten glass G side.
  • the inner surface cover 15 covers the inner surface side of the bottom wall portion 5a and the side wall portion 5b constituting the flow path R3 of molten glass, the refractory brick G constituting the bottom wall portion 5a and the side wall portion 5b, Direct contact with the molten glass can be reduced as much as possible, and the components of the refractory brick can be prevented from eluting to the molten glass G side. Accordingly, even when the clarification of the molten glass G is continuously performed for a long period of time, the production of the molten glass G can be performed without causing elution of the components of the refractory bricks in the molten glass G flowing through the flow paths R2 and R3. It can be carried out.
  • a high-quality glass product G6 can be obtained by sending a high-quality molten glass G whose composition is not disturbed to the next process and forming it with the forming apparatus 6.
  • polished the surface can also be manufactured.
  • the silica coat film may prevent the reaction between Mo and air before the molten glass G covers the entire inner surface cover 15 at the start of production of the molten glass, the molten glass G covers the entire inner surface cover 15. Cover with a film thickness sufficient to withstand time. After the molten glass G covers the entire inner surface cover 15, the silica coat film melts and disappears as time passes, and thereafter, the molten glass G covering the inner surface cover 15 isolates the inner surface cover 15 from the air.
  • a gap D1 is formed between the first bottom wall plate 20 and the second bottom wall plate 25, and the flow of the flow path R2
  • a gap D2 is formed between the cover assemblies 16 and 16 adjacent to each other in the front and rear direction.
  • the thermal expansion coefficient of the refractory brick 4d constituting the bottom wall portion 4a and the side wall portion 4b of the flow path R2 is different from that of the inner surface cover 15 made of a heat-resistant metal such as Mo.
  • each plate constituting the inner surface cover 15 expands more than the refractory brick 4d having a low coefficient of thermal expansion.
  • the gaps D1 and D2 are formed on the inner side of the inner cover 15, the thermal expansion of each plate constituting the inner cover 15 can be absorbed by the gaps D1 and D2, and the molten glass G
  • unnecessary thermal stress can be prevented from being applied to the inner surface cover 15 in a heated state. Therefore, even if the molten glass is manufactured by continuously using the second clarification tank 4 and the cooling tank 5 provided with the inner surface cover 15, unnecessary burdens such as thermal stress do not act on the inner surface cover 15.
  • the following effects can be acquired by inserting the ear
  • the molten glass G flows along the flow path R2
  • the molten glass G flows through the flow path R2 on the inner surface side of the inner surface cover 15, and at the same time, the bottom wall portion 4a and the side wall portion 4b of the flow path R2 and the inner surface cover 15
  • a small amount of molten glass G also flows into the gap portion with the back side.
  • the inner surface of the flow path R2 Even if a plurality of cover assemblies 16 are engaged to form the inner surface cover 15 and cover the surface of the bottom wall portion 4a and the side wall portion 4b of the flow path R2, the inner surface of the flow path R2
  • the bottom surface and the side surface of the inner cover 15 are not completely in close contact with each other.
  • the upper ends of the side wall plates 21 and 26 of the inner surface cover 15 are at a position lower than the liquid level GH of the molten glass, and the inner surface cover 15 has gaps D1 and D2, so the back side of the inner surface cover 15 is provided.
  • some molten glass G wraps around.
  • the molten glass G flowing between the bottom wall portion 4a and the side wall portion 4b of the flow path R2 and the inner surface cover 15 directly contacts the bottom wall portion 4a and the side wall portion 4b, so that the bottom wall portion 4a and the side wall portion 4b are formed.
  • the refractory brick 4d may be eroded or a part of the components constituting the refractory brick 4d may be eluted to the molten glass side to contaminate the molten glass.
  • the amount of the molten glass G flowing between the bottom wall portion 4a and the side wall portion 4b and the back surface side of the inner surface cover 15 is extremely small with respect to the main flow of the molten glass flowing on the inner side of the flow path R2.
  • the molten glass that has flowed into the back surface side of the cover 15 cannot easily return to the flow path R2 side, the molten glass G that flows through the flow path R2 inside the inner surface cover 15 is slightly contaminated on the back side of the inner surface cover 15. The possibility that the molten glass G is affected is low.
  • the molten glass G flowing between the bottom wall portion 4a and the side wall portion 4b and the back surface side of the inner surface cover 15 tends to move along the flow direction of the flow path R2.
  • the ear portions 21a and 26a are intermittently present at a plurality of locations in the length direction of the inner surface cover 15, the molten glass G travels along the back surface side of the inner surface cover 15 and moves downstream in the flow path R2. Since the ear portions 21a and 26a block the flow to be attempted, the molten glass G on the back surface side of the inner surface cover 15 that is likely to get dirty by touching the side wall portion 4b is not sent downstream of the flow path R2.
  • FIG. 9 is an inner surface cover applied to the structure of the second embodiment of the fining tank according to the present invention, and the upper end of the Mo side wall plate 21 in the cover assembly protrudes upward from the liquid surface position GH of the molten glass G.
  • It is sectional drawing which shows an example structure at the time of arranging in this way.
  • the Mo side wall plate 21 is arranged so as to protrude upward from the liquid surface position GH of the molten glass G as in this embodiment, the outer side of the inverted U-shaped cross section is arranged so that the side wall plate 21 does not come into contact with air.
  • the upper end portion of the side wall plate 21 is covered by the first cover piece 51 and the inner second cover piece 52.
  • the outer first cover piece 51 is made of a Pt alloy such as Pt and PtRh, and a heat resistant metal material such as iridium, and the inner second cover piece 52 is made of a heat resistant ceramic such as alumina (Al 2 O 3 ) and zirconia. .
  • the outer first cover piece 51 is made of a heat-resistant metal that is not easily eroded by the molten glass G and that does not have any problem even if it comes into contact with the air.
  • the second cover piece 52 made of heat-resistant ceramic is formed after the clarification tank 4 is constructed.
  • the position of the lower edge portion 51a of the outer first cover piece 51 is formed so as to be positioned above the lower end portion 52a of the inner second cover piece 52, and the first cover It is desirable that the lower end portion 51a of the piece 51 is separated from the surface of the side wall plate 21 by about several tens of millimeters.
  • the upper end positions of the Mo side wall plates 21 and 26 can be disposed above the liquid surface position GH of the molten glass G.
  • the side wall portion 4b constituting the flow path R2 can be covered with the inner surface cover 15 in a wider range.
  • the 1st side wall plate 21 can be arrange
  • the glass manufacturing apparatus 1 is operated so that the liquid level position GH of the molten glass G fluctuates up and down and the clarification tank 4 is used, a structure in which the side wall plates 21 and 26 are hardly damaged can be provided. That is, even if the liquid level position GH of the molten glass G changes about the height of the first cover piece 51, the side wall plates 21 and 26 do not come into contact with air. Even if the liquid level position GH fluctuates, there is no problem.
  • FIG. 10 shows a cover assembly 16 applied to the structure of the third embodiment according to the present invention.
  • Ears 20c, 25c are also provided on the end portions of the first bottom wall plate 20 and the second bottom wall plate 25.
  • An example is shown.
  • Other structures are the same as those of the first embodiment.
  • the ear portion 20c is provided downward on the end portion side of the first bottom wall plate 20, and the ear portion 25c is provided downward on the end portion side of the second bottom wall plate 25.
  • the first bottom wall plate 20 and the second bottom wall plate 25 are installed on the bottom wall portion 4a of the clarification tank 4 by being inserted into the joints or slits 4h of the refractory brick 4c constituting the bottom wall portion 4a. Has been.
  • the ear portions 20c, 25c are formed on the end portions of the first bottom wall plate 20 and the second bottom wall plate 25, the first bottom wall plate 20 and the second bottom wall plate 20
  • the ear portions 20c and 25c block the flow of the molten glass G that is about to flow along the flow path R2 in the gap area between the second bottom wall plate 25 and the bottom wall portion 4a of the flow path R2, and the gap area It is possible to prevent the flow of the molten glass G that is about to flow to the downstream side of the flow path R2.
  • the ear portions 20 c and 25 c on the end portions of the first bottom wall plate 20 and the second bottom wall plate 25, the dirty molten glass G can be prevented from flowing to the downstream side of the clarification tank 4.
  • the dirty molten glass G in the gap portion between the side wall portion 4b and the cover assembly 16 is not allowed to flow downstream. It is possible to provide a structure in which the molten glass G contaminated in the gap between the bottom wall portion 4a and the cover assembly 16 does not flow downstream.
  • FIG. 11 shows a cover assembly 16A applied to the inner surface cover 15A of the fourth embodiment according to the present invention.
  • the structure of the first embodiment is different from that of the previous first embodiment.
  • the first bottom wall plate 20 and the second bottom wall plate 25 separated in the first embodiment are integrated into a single bottom wall plate 60.
  • the first plate assembly 17 and the second plate assembly 18 separated in the previous first embodiment are integrated into a single plate assembly 61.
  • the third cover plates 22A and 22B separated in the previous first embodiment are integrated into a U-shaped cover plate 62, and the fourth cover plate 24 is omitted.
  • the cross-sectional shape of the cover plate 62 is formed in a U shape including a bottom plate 62a and side plates 62b on both sides.
  • the bottom plate 62a of the cover plate 62 is placed on the end edge side of the bottom wall plate 60 by about half the width, and the remaining half width is projected, and the cover assembly 16A is fixed by a fixture such as a rivet (not shown).
  • a cover plate 62 is fixed to the edge portion of the cover.
  • one side plate 62b of the cover plate 62 is put on the first side wall plate 21 by a half width, the remaining half width is projected, and the other side plate 62b is half a width on the edge side of the second side wall plate 26.
  • the cover plate 62 is fixed to the end edge portion of the cover assembly 16A by a fixing tool such as a rivet (not shown).
  • the side wall plates 21 and 26 are formed by bending a single heat-resistant metal plate with respect to the bottom wall plate 60.
  • the bottom wall 4a and the side walls 4b, 4b of the flow path R2 can be protected from the molten glass G also by the inner surface cover 15A of the fourth embodiment.
  • the absorption effect of the thermal expansion when the cover assemblies 16A and 16A expand in the length direction of the flow path R2 can be obtained in the same manner as the structure of the first embodiment. That is, the length of the flow path R2 using the gap between the bottom wall plates 60, 60 adjacent to each other in the flow direction of the flow path R2, the clearance between the side wall plates 21, 21, and the clearance between the side wall plates 26, 26.
  • the absorption effect of the thermal expansion when the cover assemblies 16A and 16A are thermally expanded in the direction can be obtained.
  • the inner surface cover 15A of the fourth embodiment shares the first plate assembly 17 and the second plate assembly 18 that are adjacent to each other in the width direction of the flow path R2 in the first embodiment. Therefore, the absorption effect when the cover assembly 16A expands in the width direction of the flow path R2 cannot be obtained, but the side wall plates 21 and 26 are not in close contact with the side wall portion 4b of the flow path R2, but have a slight gap. Since the gaps are arranged so that the thermal expansion in the width direction of the flow path R2 does not need to be considered, the structure shown in FIG. 11 can be applied.
  • the side wall plate 26 when the side wall plate 26 is supported by a bolt-shaped fixture 35 made of a heat-resistant metal such as Mo so as to penetrate the refractory brick 4d as shown in FIG. 6, there is a gap between the side wall plate 26 and the refractory brick 4d.
  • This gap can be used for absorbing the thermal expansion.
  • the ears 26a of the side wall plate 26 are reliably supported by the joints 4B of the refractory bricks 4d, there will be no problem with the structural strength of the side wall plate 26.
  • the technology of the present invention can be widely applied to the production of architectural glass, vehicle glass, optical glass, medical glass, display device glass, and other general glass products.
  • the entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2010-293234 filed on Dec. 28, 2010 are incorporated herein as the disclosure of the present invention. .
  • R1, R2, R3 ... flow path, G ... molten glass, GH ... liquid surface position of molten glass, 1 ... manufacturing apparatus, 2 ... melting tank, 3 ... first clarification tank, 4 ... second clarification tank, 4a ... bottom wall part, 4b ... side wall part, 4g, 4e ... refractory brick (refractory), 4h ... slit, 5 ... cooling tank, 5a ... bottom wall part, 5b ... side wall part, 6 ... molding device, 7 ... clarification tank , 8 ... Electrode, 14 ... Glass melting furnace, 15 ... Inner cover, 16 ... Cover assembly, 17 ... First plate assembly, 18 ... Second plate assembly, 20 ... First bottom wall plate, 20c ... ear part, 21 ...

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  • Engineering & Computer Science (AREA)
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  • Thermal Sciences (AREA)
  • Glass Melting And Manufacturing (AREA)

Abstract

La présente invention vise à procurer une structure comportant un revêtement de surface interne pour protéger une paroi inférieure et des parois latérales vis-à-vis de verre liquide. A cet effet, la présente invention porte sur un réservoir de clarification, qui comporte un canal d'écoulement de verre liquide formé à partir de briques ignifuges. Le réservoir de clarification comporte : une paroi inférieure et des parois latérales disposées des deux côtés de la paroi inférieure de façon à constituer un canal d'écoulement de verre liquide ; et un revêtement de surface interne qui recouvre la paroi inférieure et les parois latérales sur les côtés qui constituent le canal d'écoulement de verre liquide. Le revêtement de surface interne comprend une pluralité d'ensemble de revêtement disposés le long de la direction du canal d'écoulement de verre liquide, et les ensembles de revêtement comportent une plaque inférieure qui recouvre la paroi inférieure, des plaques latérales qui recouvrent les parois latérales, et des premières plaques de revêtement qui recouvrent les régions où les ensembles de revêtements disposés le long du canal d'écoulement butent les uns contre les autres.
PCT/JP2011/080490 2010-12-28 2011-12-28 Réservoir de clarification, four de fusion de verre, procédé de production de verre liquide, procédé de production d'article en verre et dispositif de production d'article en verre WO2012091130A1 (fr)

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JP2012551058A JPWO2012091130A1 (ja) 2010-12-28 2011-12-28 清澄槽、ガラス溶融炉、溶融ガラスの製造方法、ガラス製品の製造方法およびガラス製品の製造装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020045016A1 (fr) * 2018-08-30 2020-03-05 日本電気硝子株式会社 Dispositif de fabrication et procédé de fabrication pour article en verre

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007020887A1 (fr) * 2005-08-19 2007-02-22 Nippon Electric Glass Co., Ltd. Matériau résistant à la chaleur pour la fusion du verre, dispositif de production d’un objet en verre, et procédé de production d’un objet en verre
JP2007153713A (ja) * 2005-12-08 2007-06-21 Tanaka Kikinzoku Kogyo Kk ガラス製造用装置
JP2010202444A (ja) * 2009-03-03 2010-09-16 Asahi Glass Co Ltd ガラス溶融炉及びガラス溶融方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007020887A1 (fr) * 2005-08-19 2007-02-22 Nippon Electric Glass Co., Ltd. Matériau résistant à la chaleur pour la fusion du verre, dispositif de production d’un objet en verre, et procédé de production d’un objet en verre
JP2007153713A (ja) * 2005-12-08 2007-06-21 Tanaka Kikinzoku Kogyo Kk ガラス製造用装置
JP2010202444A (ja) * 2009-03-03 2010-09-16 Asahi Glass Co Ltd ガラス溶融炉及びガラス溶融方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020045016A1 (fr) * 2018-08-30 2020-03-05 日本電気硝子株式会社 Dispositif de fabrication et procédé de fabrication pour article en verre

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