WO2010067669A1 - Élément d'installation de transport de verre fondu et système de production de verre - Google Patents

Élément d'installation de transport de verre fondu et système de production de verre Download PDF

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Publication number
WO2010067669A1
WO2010067669A1 PCT/JP2009/068698 JP2009068698W WO2010067669A1 WO 2010067669 A1 WO2010067669 A1 WO 2010067669A1 JP 2009068698 W JP2009068698 W JP 2009068698W WO 2010067669 A1 WO2010067669 A1 WO 2010067669A1
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Prior art keywords
conduit
ceramic structure
molten glass
platinum
thermal expansion
Prior art date
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PCT/JP2009/068698
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English (en)
Japanese (ja)
Inventor
和雄 浜島
伸広 篠原
弘法 佐藤
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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.)
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Priority to CN200980150354.1A priority Critical patent/CN102245519B/zh
Priority to JP2010542058A priority patent/JP5500077B2/ja
Publication of WO2010067669A1 publication Critical patent/WO2010067669A1/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
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/225—Refining
    • 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
    • C03B5/2252—Refining under reduced pressure, e.g. with vacuum refiners
    • 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
    • C03B7/08—Feeder spouts, e.g. gob feeders
    • C03B7/084—Tube mechanisms

Definitions

  • the present invention relates to a molten glass transport equipment element that can be suitably used in a glass manufacturing apparatus such as a vacuum degassing apparatus, and a glass manufacturing apparatus including the molten glass transport equipment element.
  • a constituent material of a molten glass conduit is required to have excellent heat resistance and corrosion resistance to molten glass.
  • platinum or a platinum alloy is used (see Patent Document 1).
  • a heat insulating brick is disposed around a conduit made of platinum or a platinum alloy molten glass so as to surround the conduit.
  • the platinum or platinum alloy that composes the conduit and the insulating bricks that are placed around the conduit have different coefficients of thermal expansion, so the difference in the amount of thermal expansion during heating and the amount of contraction during cooling is a problem. It becomes.
  • the castable cement is placed between the two so that the two can move slightly when the temperature changes. Such an irregular ceramic material is filled.
  • FIG. 1 is a cross-sectional view showing a configuration example of a vacuum degassing apparatus.
  • a vacuum degassing tank 130 is accommodated in the vacuum housing 120 so that the major axis thereof is oriented in the horizontal direction.
  • a rising pipe 140 is attached to the lower surface of one end of the vacuum degassing tank 130, and a lowering pipe 150 is attached to the lower surface of the other end.
  • a heat insulating material 160 is disposed around the decompression defoaming tank 130, the ascending pipe 140 and the descending pipe 150.
  • the riser 140 is connected to a structure upstream of the molten glass (not shown; for example, a glass melting tank) via conduits 170, 180, and 190.
  • the downcomer 150 is connected to a downstream structure (not shown; for example, a sheet glass forming apparatus such as a float bath) via conduits 200, 220, and 240.
  • the riser 140 with a vertical central axis is routed through a conduit 170 with a central axis in the horizontal direction, a conduit 180 with a central axis in the vertical direction and a conduit 190 with a central axis in the horizontal direction.
  • the downcomer 150 having the central axis in the vertical direction is a downstream structure through the conduit 200 having the central axis in the horizontal direction, the conduit 220 having the central axis in the vertical direction, and the conduit 240 having the central axis in the horizontal direction.
  • the ascending pipe 140, the descending pipe 150, and the conduits 170, 180, 190, 200, 220, and 240 are platinum or platinum alloy pipes.
  • a heat insulating brick is disposed so as to surround the platinum or platinum alloy tube, and an amorphous ceramic material is interposed between the platinum or platinum alloy tube and the heat insulating brick. Filled.
  • a tube 140, 150, 180, and 220
  • a tube (170, 190, 200, and 240) having a central axis in the horizontal direction is used alone, platinum is used.
  • the difference in the amount of thermal expansion during heating or the amount of shrinkage during cooling between the platinum alloy tube and the heat insulating brick can be absorbed by an amorphous ceramic material filled between them. .
  • the joint between the pipe having the central axis in the vertical direction and the pipe having the central axis in the horizontal direction (the joint between the rising pipe 140 and the conduit 170, the joint between the down pipe 150 and the conduit 200, the conduit 170 and the conduit) 180, a joint between the conduit 180 and the conduit 190, a joint between the conduit 200 and the conduit 220, and a joint between the conduit 220 and the conduit 240), or the difference in thermal expansion during heating, or The difference in shrinkage during cooling cannot be absorbed by the amorphous ceramic material, and cracks may occur at the joint.
  • a crack occurs at the joint, there is a problem that the insulating brick disposed around is eroded by the molten glass leaking from the crack. As a result, there are problems such as a decrease in productivity due to restoration work and a shortened equipment life.
  • the present invention joins a conduit having a central axis in the vertical direction and a conduit having a central axis in the horizontal direction by thermal expansion during heating or contraction during cooling. And a molten glass conveying equipment element having a ceramic structure that is difficult to be eroded even if the molten glass leaks for some reason, and the molten glass conveying equipment. It aims at providing the glass manufacturing apparatus containing an element.
  • the present invention provides at least a first conduit having a central axis in the vertical direction and a second conduit having a central axis in the horizontal direction communicating with the first conduit.
  • a molten glass conduit structure comprising one by one, wherein the first conduit and the second conduit are made of platinum or a platinum alloy;
  • a molten glass transport equipment element having a ceramic structure disposed around the first conduit and the second conduit, The ceramic structure contains 75 wt% or more of zirconium oxide by mass% with respect to the total composition, and the proportion of cubic zirconia in the zirconium oxide is 80 wt% or more,
  • the ceramic structure has an average open porosity of 5 to 60%,
  • a molten glass transport equipment element wherein the ceramic structure has a linear thermal expansion coefficient at 20 to 1000 ° C. of 8 ⁇ 10 ⁇ 6 to 12 ⁇ 10 ⁇ 6 / ° C.
  • the present invention provides a glass manufacturing apparatus including the molten glass conveying equipment element of the present invention.
  • the linear thermal expansion coefficients of the molten glass conduit made of platinum or a platinum alloy and the ceramic structure disposed around the conduit are substantially the same.
  • the difference in thermal expansion amount or shrinkage amount during cooling is extremely small. For this reason, cracks are prevented from occurring at the junction between the conduit having the central axis in the vertical direction and the conduit having the central axis in the horizontal direction due to thermal expansion during heating or contraction during cooling. Furthermore, even if the molten glass leaks for some reason, the ceramic structure in the present invention is hardly eroded.
  • the glass manufacturing apparatus including the molten glass conveyance equipment element of the present invention is prevented from cracking at the conduit joint due to thermal expansion during heating or contraction during cooling, and Even if the molten glass leaks for the reason, the ceramic structure is hard to be eroded. Therefore, it is excellent in reliability, and the glass can be manufactured stably over a long period of time.
  • Sectional drawing which showed one structural example of the vacuum deaeration apparatus. Sectional drawing which showed 1 structural example of the molten glass conveyance equipment element of this invention. Sectional drawing of the test body used in Test Example 1.
  • FIG. The perspective view which showed the electric power feeding part 6 vicinity of the upper part of FIG. 3 and FIG. Sectional drawing of the test body used in the comparative example 1.
  • FIG. Explanatory drawing of the immersion test implemented in Test Example 2.
  • FIG. 2 is a cross-sectional view showing one configuration example of the molten glass conveyance equipment element of the present invention. 2 corresponds to a partially enlarged view of the conduits 200, 220, and 240 in FIG.
  • the molten glass conduit structure 1 is centered in the horizontal direction with respect to a first conduit (hereinafter referred to as “vertical tube”) 1a having a central axis in the vertical direction.
  • first conduit hereinafter referred to as “vertical tube” 1a having a central axis in the vertical direction.
  • Two second conduits hereinafter referred to as “horizontal pipes”) 1b having shafts and another 1b communicate with each other.
  • the molten glass conveyance equipment element in the present invention is not limited to the illustrated embodiment, as long as it has at least one vertical pipe and one horizontal pipe communicating with the vertical pipe.
  • one horizontal pipe may communicate with one vertical pipe.
  • one horizontal pipe communicates with one vertical pipe at one end side, and the horizontal pipe communicates with another vertical pipe at the other end side (see FIG. 1 or a structure corresponding to a combination of the conduits 150, 200 and 220 in FIG. 1), and one or more vertical pipes or horizontal pipes, or both of which communicate with such a structure (in FIG. 1).
  • a structure corresponding to a combination of the conduits 150, 200, 220, and 240 may be any structure corresponding to a combination of the conduits 150, 200, 220, and 240.
  • the vertical pipe in the present invention does not necessarily require that the central axis is in the vertical direction in a strict sense, and the central axis may be inclined with respect to the vertical direction.
  • the central axis is not necessarily required to be in the horizontal direction in a strict sense, and the central axis may be inclined to some extent with respect to the horizontal direction.
  • the vertical pipe and the horizontal pipe in the present invention are intended to have a relative relationship between them, and when one of the pipes is a vertical pipe, the pipe intersecting with the vertical pipe is the horizontal pipe. It is.
  • an angle formed by the vertical pipe and the horizontal pipe is within a range of 90 ⁇ 10 ° at a joint portion between the vertical pipe and the horizontal pipe.
  • the constituent materials are required to have excellent heat resistance and corrosion resistance to the molten glass.
  • the first conduit and the second conduit are made of platinum or a platinum alloy such as a platinum-gold alloy, a platinum-rhodium alloy, or a platinum-iridium alloy.
  • the platinum or platinum alloy constituting the first conduit and the second conduit is reinforced platinum formed by dispersing metal oxide particles such as Al 2 O 3 , ZrO 2 , or Y 2 O 3 in platinum or a platinum alloy. It is preferable that The content of these metal oxide particles is 0.1 to 0.5% by mass, preferably 0.15 to 0.4% by mass, based on the platinum alloy (100% by mass).
  • metal oxide particles dispersed in platinum or a platinum alloy have an effect of hindering dislocations and growth of crystal grains, thereby increasing mechanical strength.
  • the ductility of the material is lower than that of normal platinum or platinum alloy, so the heat during heating of the insulating bricks placed around the pipe at the junction between the vertical pipe and the horizontal pipe is high.
  • the difference in expansion amount or the difference in shrinkage amount during cooling cannot be absorbed by the elongation of the tube material, and cracks are likely to occur at the joint.
  • the ceramic structure 2 is arrange
  • the ceramic structure 2 in the present invention contains 75 wt% or more of zirconium oxide in mass% with respect to the total composition, and the proportion of cubic zirconia in the zirconium oxide is 80 wt% or more.
  • the present invention uses a heat insulating brick arranged around the first conduit and the second conduit, mainly composed of cubic zirconia, which is a fully stabilized zirconia. By having cubic zirconia as the main component, the amount of thermal expansion during heating or the amount of shrinkage during cooling is approximately the same between the first conduit and the second conduit and the ceramic structure disposed around them. Will be equal.
  • Cubic zirconia which is a fully stabilized zirconia, has a linear thermal expansion coefficient very close to that of platinum or a platinum alloy constituting the conduit at 20 to 1000 ° C. as shown below. Can be prevented.
  • Linear thermal expansion coefficient of platinum and platinum alloy 9.5 ⁇ 10 ⁇ 6 / ° C. to 11 ⁇ 10 ⁇ 6 / ° C.
  • Linear thermal expansion coefficient of cubic zirconia 8.5 ⁇ 10 ⁇ 6 / ° C. to 10.
  • Zirconium oxide such as cubic zirconia is excellent in heat resistance, corrosion resistance of molten glass, and corrosion resistance against corrosive gas, and the like, around the first and second conduits which are conduits for molten glass. It is suitable as a heat insulating brick to be arranged.
  • the linear thermal expansion coefficient of the ceramic structure at 20 to 1000 ° C. is 8 ⁇ 10 ⁇ 6 to 12 ⁇ 10 ⁇ 6 / ° C., and 9 ⁇ 10 ⁇ 6 to 11 ⁇ 10 ⁇ 6. / ° C. is preferable, and 9.5 ⁇ 10 ⁇ 6 to 10.5 ⁇ 10 ⁇ 6 / ° C. is more preferable.
  • the linear thermal expansion coefficient of platinum or platinum alloy varies somewhat depending on the composition
  • the linear thermal expansion coefficient of the ceramic structure is set according to the linear thermal expansion coefficient of platinum or platinum alloy used for the first conduit and the second conduit. It is preferable to select. Specifically, the linear thermal expansion coefficient at 20 to 1000 ° C.
  • the ceramic structure is ⁇ 15% of the linear thermal expansion coefficient at 20 to 1000 ° C. of platinum or platinum alloy constituting the first conduit and the second conduit. Is preferably within ⁇ 10%, more preferably within ⁇ 10%, and even more preferably within ⁇ 5%.
  • the zirconium oxide contained in the ceramic structure is 75 wt% or more, and the proportion of cubic zirconia in the ceramic structure needs to be 80 wt% or more.
  • the proportion of cubic zirconia in the zirconium oxide contained in the ceramic structure is preferably 85 wt% or more, and more preferably 90 wt% or more.
  • the ceramic structure 2 of the present invention contains, as a balance excluding zirconium oxide, a stabilizer added to make zirconium oxide into cubic zirconia which is a stabilized zirconia. Further, the remainder may contain inevitable impurities. Moreover, as long as the present invention is not affected, the ceramic structure 2 of the present invention may contain other components other than zirconium oxide and a stabilizer up to about 8 wt% in total. Examples of such other components include Al 2 O 3 and MgO which are added to improve the sinterability, and these can be contained up to about 5 wt% in total.
  • Stabilizers include yttrium oxide, cerium oxide, magnesium oxide, calcium oxide, erbium oxide, etc., but have excellent corrosion resistance to molten glass, are easily available, and are stable even when kept at high temperatures for a long time. For this reason, yttrium oxide and cerium oxide are preferred.
  • the stabilizer contains at least one selected from the group consisting of yttrium oxide and cerium oxide, the total content of both is preferably 6 wt% or more, more preferably 8 wt% or more, and 10 wt% % Or more is more preferable.
  • the amount of stabilizer added is too large, there are problems such as difficulty in sintering and increased raw material costs. For this reason, it is preferable that the total content rate of both is 25 wt% or less, and it is more preferable that it is 20 wt% or less.
  • the content of zirconium oxide in the ceramic structure varies depending on the addition amount of the stabilizer, but is 75 wt% or more, preferably 80 wt% or more in order to bring the linear thermal expansion coefficient into a predetermined range, and preferably 85 wt%. More preferably.
  • the upper limit of the content of zirconium oxide in the ceramic structure is about 94 wt% in consideration of the amount of stabilizer added.
  • the ceramic structure of the present invention has an average open porosity of 5 to 60%.
  • the ceramic structure of the present invention is excellent in corrosion resistance to molten glass. However, if the average open porosity exceeds 60%, the corrosion resistance to molten glass is lowered. On the other hand, if the average open porosity is less than 5%, the thermal shock resistance of the ceramic structure is lowered.
  • the ceramic structure of the present invention preferably has an average open porosity of 25 to 60%, more preferably 30 to 50%, and particularly preferably 35 to 45%.
  • the average porosity of the ceramic structure is preferably 5 to 35%, and preferably 8 to 30%. Is more preferable, and 10 to 25% is particularly preferable.
  • the average open porosity of the ceramic structure can be determined by measurement using the Archimedes method or a mercury porosimeter.
  • the ceramic structure of the present invention may have different open porosity depending on the part. For example, the corrosion resistance with respect to molten glass can be improved by lowering the open porosity of the portion facing the first conduit and the second conduit than the other portions.
  • a gap 3 is provided between the first conduit 1 a and the second conduit 1 b and the ceramic structure 2.
  • the amount of thermal expansion during heating or the amount of contraction during cooling is such that the first conduit 1a and the second conduit 1b, and the ceramic structure 2 disposed around them, Almost equal.
  • platinum or platinum alloy constituting the first conduit 1a and the second conduit 1b and zirconium oxide constituting the ceramic structure 2 have different thermal conductivities, depending on heating conditions or cooling conditions, heating may be performed.
  • there is a difference between the timing of thermal expansion during cooling or contraction during cooling and there is a crack at the joint between the first conduit 1a that is a vertical tube and the second conduit 1b that is a horizontal tube. May occur.
  • the thermal expansion at the time of heating or the timing of the contraction at the time of cooling between them is shifted. It can absorb, and it can prevent that a crack generate
  • the amount of thermal expansion during heating or the amount of shrinkage during cooling is approximately equal between the first conduit 1a and the second conduit 1b and the ceramic structure 2 disposed around them. Therefore, it is not necessary to fill the gap 3 with an irregular ceramic material.
  • the width d of the gap 3 is preferably not less than 0.5 mm and not more than 0.02 ⁇ r (mm), where r (mm) is the maximum diameter of the first conduit 1a and the second conduit 1b.
  • r (mm) is the maximum diameter of the first conduit 1a and the second conduit 1b.
  • the width d of the gap 3 is less than 0.5 mm, there is a possibility that a shift in timing of thermal expansion during heating or contraction during cooling cannot be sufficiently absorbed.
  • the width d of the gap 3 is larger than 0.02 ⁇ r (mm)
  • a large gap remains between them after expansion, and the first conduit 1a and the second conduit 1b are caused by molten glass passing through the interior. There are problems such as deformation.
  • the maximum diameter r is preferably 60 mm or more.
  • the maximum diameter r varies depending on the site where these conduits are used, but the ascending pipe 140, descending pipe 150 and conduits 170, 180, 190, 200, 220 connected to these as shown in FIG. In the case of 240, it is usually 120 to 400 mm.
  • the width d (mm) of the gap 3 is more preferably 1 to 3 mm, and further preferably 1.5 to 2.5 mm.
  • the ceramic structure disposed around the first conduit and the second conduit is kept to the minimum necessary.
  • the ceramic structure (hereinafter sometimes referred to as “first ceramic structure”) is disposed, and a normal heat insulating brick is disposed as a second ceramic structure on the outside thereof.
  • a heat insulating brick mainly composed of at least one selected from the group consisting of alumina, magnesia, zircon and silica can be used.
  • heat insulating brick used as the second ceramic structure examples include silica / alumina heat insulating brick, zirconia heat insulating brick, and magnesia heat insulating brick.
  • examples of commercially available products include SP-15 (manufactured by Hinomaru Ceramics Co., Ltd.), LBK3000 (manufactured by Isolite Kogyo Co., Ltd.), and the like.
  • the thickness of the first ceramic structure is 15 mm or more. If the thickness of the first ceramic structure is less than 15 mm, the amount of thermal expansion during heating or the amount of contraction during cooling of the first ceramic structure is hindered by the second ceramic structure. A difference in the amount of thermal expansion during heating or the amount of shrinkage during cooling increases between the conduit and the second conduit and the ceramic structure disposed around the conduit, and the first conduit and the second conduit. Cracks are likely to occur at the joints.
  • the maximum diameter of the first conduit 1a and the second conduit 1b is r (mm)
  • the thickness of the first ceramic structure is 0.3 ⁇ r (mm) or less. It is preferable for reasons such as surface and ease of construction.
  • the thickness of the first ceramic structure is more preferably 15 to 120 mm, and further preferably 30 to 80 mm.
  • the glass manufacturing apparatus of the present invention uses the molten glass transport equipment element of the present invention as at least a part of the flow path of the molten glass.
  • the vacuum degassing apparatus using the molten glass conveyance equipment element of this invention is mentioned as at least one part of the flow path of molten glass.
  • the vacuum degassing apparatus shown in FIG. 1 is the glass manufacturing apparatus of the present invention, as at least part of the combination of the rising pipe 140 and the pipes 170, 180, and 190, or the down pipe 150, the pipes 200, 220, and
  • the molten glass conveying equipment element of the present invention is included as at least part of the combination of 240 or both.
  • the glass manufacturing apparatus of the present invention is not particularly limited as long as it uses the molten glass conveying equipment element of the present invention as at least a part of the flow path of the molten glass, and the upstream glass melting tank and the downstream glass sheet A molding apparatus (for example, a float bath) may be included.
  • FIG. 3 is a cross-sectional view of the test body used in Test Example 1.
  • a ceramic structure 2 is disposed around a hollow tube 1c made of reinforced platinum, and the hollow tube 1c is disposed in a state where a second ceramic structure 4 is disposed around the ceramic structure 2.
  • a second ceramic structure 4 is disposed around the ceramic structure 2.
  • the hollow tube 1c 0.16% by mass of ZrO 2 particles is dispersed in reinforced platinum (platinum-rhodium alloy (90% by mass of platinum, 10% by mass of rhodium) having an outer diameter of 60 mm, a length of 300 mm, and a thickness of 0.5 mm.
  • platinum platinum-rhodium alloy (90% by mass of platinum, 10% by mass of rhodium
  • a flange 5 having a width of 15 mm and a thickness of 1.2 mm was fixed at a position 200 mm from one end of the hollow tube 1c by TIG (tungsten inert gas) welding.
  • TIG tungsten inert gas
  • the electric power feeding part 6 for electric heating was welded to the upper end of the hollow tube 1c.
  • a power feeding portion 6 for current heating is also welded to the lower end of the hollow tube 1c.
  • the flange 5 and the power feeding portion 6 are reinforced platinum (platinum-rhodium alloy (platinum 90% by mass, rhodium 10% by mass) in which 0.16% by mass of ZrO 2 particles are dispersed).
  • the ceramic structure 2 disposed around the hollow tube 1c is made of zirconium oxide in which 12% by mass of yttrium oxide is added as a stabilizer with respect to the total amount of zirconium oxide and yttrium oxide.
  • the linear thermal expansion coefficient at 20 to 1000 ° C. is 9.8 ⁇ 10 ⁇ 6 / ° C.
  • about the average porosity of the ceramic structure 2 about 8% and about 40% were tested about two types.
  • a gap of 0.5 mm was provided between the hollow tube 1c and the ceramic structure 2. Further, as shown in FIG. 3, the ceramic structure 2 is sandwiched between two power feeding portions 6, but the lower end side of the ceramic structure 2 is mechanically fixed to the power feeding portion 6. (Not shown). On the outside of the ceramic structure 2, a commercially available silica / alumina insulating brick (SP-15 (manufactured by Hinomaru Ceramic Co., Ltd.)) was disposed as the second ceramic structure 4. A specimen in which the periphery of the second ceramic structure 4 was fastened with a metal frame was used as a test specimen.
  • SP-15 silica / alumina insulating brick
  • the hollow tube 1c While the temperature is controlled by a thermocouple (not shown) arranged near the flange 5, the hollow tube 1c is energized and heated using the power feeding portion 6 and the hollow tube 1c is cooled repeatedly.
  • a temperature cycle test was performed. In addition, after heating at a temperature increase rate of 200 ° C./hour, holding at 1400 ° C. for 3 hours, and then naturally cooling to 200 ° C. was repeated 20 times.
  • the hollow tube 1c and the ceramic structure 2 are expanded and contracted in the axial direction except for the lower end side mechanically fixed to the power feeding portion 6 and the portion where the flange 5 is provided. , You can escape freely.
  • the specimen was disassembled and the state of the hollow tube 1c was confirmed.
  • FIG. 5 is a cross-sectional view of the test body used in Comparative Example 1.
  • a commercially available product used as the second ceramic structure 4 in Test Example 1 around the hollow tube 1c.
  • Silica-alumina insulating brick SP-15 (manufactured by Hinomaru Ceramics Co., Ltd.)
  • SP-15 manufactured by Hinomaru Ceramics Co., Ltd.
  • a temperature cycle test was carried out in the same procedure as in Test Example 1 except that an amorphous ceramic material layer was formed.
  • the specimen was disassembled and the state of the hollow tube 1c was confirmed. As a result, fine cracks were generated at the portion where the flange 5 of the hollow tube 1c was welded. Further, the alumina mortar layer arranged around the hollow tube 1c was divided into several pieces as if it were cracked after solidification.
  • Test Example 2 Using the same material as the ceramic structure 2 of Test Example 1, three types of test samples (shape: cylindrical (diameter 20 mm, height 90 mm)) having average porosity of 8%, 33%, and 54% were prepared. .
  • the test sample 10 was immersed in molten glass 30 (borosilicate glass) contained in a platinum crucible 20 in the atmosphere. At this time, the maximum temperature of the molten glass was 1450 ° C., and the immersion time of the test sample 10 was 100 hours. After the holding time, the test sample 10 was taken out and allowed to cool naturally. Then, the test sample was cut
  • molten glass 30 borosilicate glass
  • 10.3 ⁇ 10 ⁇ 6 1) mainly composed of cubic zirconia around the ascending pipe 140, descending pipe 150, conduits 170, 180, 190, 200, 220, and 240 (cross-sectional shape: circular, outer diameter: 180 mm).
  • Ceramic structure (the content of zirconium oxide in the total composition is 88 wt%, the proportion of cubic zirconia in zirconium oxide is 95 wt%, and further contains 12 wt% of yttrium oxide as a stabilizer, with an average open pore size. rates are 12% or 35%, the linear thermal expansion coefficient at 20 ⁇ 1000 ° C. is 9.8 ⁇ 10 -6 / °C.
  • a silica-alumina insulating brick is disposed as the second ceramic structure.
  • Plate glass is manufactured by disposing a dissolution tank on the upstream side of the vacuum degassing apparatus shown in FIG. 1 and a float bath on the downstream side. Cracks do not occur at the joint between each vertical tube and horizontal tube, and the glass can be manufactured stably.
  • the glass manufacturing apparatus including the molten glass conveying equipment element of the present invention is prevented from cracking at the conduit joint due to thermal expansion during heating or contraction during cooling, and the molten glass leaks. Even if this occurs, the ceramic structure is less susceptible to erosion, is excellent in reliability, and can be produced stably over a long period of time, which is industrially useful.
  • the entire contents of the specification, claims, drawings, and abstract of Japanese Patent Application No. 2008-315710 filed on Dec. 11, 2008 are cited here as disclosure of the specification of the present invention. Incorporated.
  • Molten glass conveyance equipment element 1a First conduit (vertical tube) 1b: Second conduit (horizontal tube) 1c: Hollow tube 2: Ceramic structure 3: Gaps 4: Second ceramic structure 5: Flange 6: Power feeding part 10: Test sample 20: Crucible 30: Molten glass 100: Vacuum degassing apparatus 120: Vacuum housing 130 : Depressurized defoaming tank 140: Ascending pipe 150: Downcomer pipe 160: Heat insulating material 170, 180, 190, 200, 220, 240: Conduit

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Glass Compositions (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

L'invention porte sur un élément d'installation de transport de verre fondu qui permet la prévention d'une fissuration dans une partie de joint entre une conduite s'étendant verticalement et une conduite s'étendant horizontalement, provoquée par la dilatation thermique des conduites lors du chauffage ou par le retrait des conduites lors du refroidissement, et qui comprend un corps de structure en céramique. L'élément d'installation de transport de verre fondu comprend un corps de structure de conduite pour un verre fondu et un corps de structure en céramique. Le corps de structure de conduite comprend une première conduite s'étendant verticalement et une seconde conduite s'étendant horizontalement qui est en communication avec la première conduite, les première et seconde conduites étant constituées de platine ou d'un alliage du platine. Le corps de structure en céramique est disposé autour des première et seconde conduites. Le corps de structure en céramique contient de l'oxyde de zirconium à raison de 75 % en poids ou plus, la zircone cubique représentant jusqu'à 80 % en poids ou plus de l'oxyde de zirconium. Le corps de structure en céramique a une porosité apparente moyenne de 5 à 60 % et un coefficient de dilatation thermique linéaire de 8 × 10-6 à 12 × 10-6/˚C à une température de 20 à 1 000˚C.
PCT/JP2009/068698 2008-12-11 2009-10-30 Élément d'installation de transport de verre fondu et système de production de verre WO2010067669A1 (fr)

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WO2013011927A1 (fr) 2011-07-21 2013-01-24 旭硝子株式会社 Élément d'équipement de transport de verre fondu, procédé pour produire un élément d'équipement de transport de verre fondu, et appareil de fabrication de verre
JP2013212942A (ja) * 2012-03-30 2013-10-17 Avanstrate Inc ガラス板の製造方法およびガラス板製造装置
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WO2014073594A1 (fr) 2012-11-12 2014-05-15 旭硝子株式会社 Élément d'équipement de transport de verre fondu, procédé pour fabriquer un élément d'équipement de transport de verre fondu, appareil de fabrication de verre comprenant un élément d'équipement de transport de verre fondu et procédé pour fabriquer un produit de verre
WO2019108995A1 (fr) * 2017-12-01 2019-06-06 Corning Incorporated Appareil et procédé de production de verre
JP2020037494A (ja) * 2018-09-03 2020-03-12 日本電気硝子株式会社 ガラス物品の製造方法
US20200199005A1 (en) * 2017-09-04 2020-06-25 Nippon Electric Glass Co., Ltd. Method and device for manufacturing a glass article, and a powder for forming a bonded body
CN112384480A (zh) * 2018-08-30 2021-02-19 日本电气硝子株式会社 玻璃物品的制造装置及制造方法
JP2021062990A (ja) * 2019-10-15 2021-04-22 Ａｇｃ株式会社 溶融ガラスの搬送装置、ガラス物品の製造設備、およびガラス物品の製造方法

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WO2019102895A1 (fr) * 2017-11-21 2019-05-31 Ａｇｃ株式会社 Dispositif de transport de verre fondu, appareil de production de verre et procédé de production de verre

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WO2012048810A1 (fr) * 2010-10-11 2012-04-19 Heraeus Materials Technology Gmbh & Co. Kg Réduction des pertes par évaporation affectant des éléments en pt dans le cadre d'utilisations à haute température
US20130279532A1 (en) * 2010-10-14 2013-10-24 Schott Ag Energy efficient high-temperature refining
JP2013539743A (ja) * 2010-10-14 2013-10-28 ショット アクチエンゲゼルシャフト エネルギー効率の良い高温精製
KR101521366B1 (ko) * 2010-10-14 2015-05-18 쇼오트 아게 에너지 효율적인 고온 정련
US9802850B2 (en) 2010-10-14 2017-10-31 Schott Ag Energy efficient high-temperature refining
WO2013011927A1 (fr) 2011-07-21 2013-01-24 旭硝子株式会社 Élément d'équipement de transport de verre fondu, procédé pour produire un élément d'équipement de transport de verre fondu, et appareil de fabrication de verre
CN103687821A (zh) * 2011-07-21 2014-03-26 旭硝子株式会社 熔融玻璃搬运设备元件和熔融玻璃搬运设备元件的制造方法以及玻璃制造装置
KR101922277B1 (ko) 2011-07-21 2018-11-26 에이지씨 가부시키가이샤 용융 유리 반송 설비 요소 및 용융 유리 반송 설비 요소의 제조 방법, 및 유리 제조 장치
EP2735550A4 (fr) * 2011-07-21 2014-12-10 Asahi Glass Co Ltd Élément d'équipement de transport de verre fondu, procédé pour produire un élément d'équipement de transport de verre fondu, et appareil de fabrication de verre
JPWO2013011927A1 (ja) * 2011-07-21 2015-02-23 旭硝子株式会社 溶融ガラス搬送設備要素および溶融ガラス搬送設備要素の製造方法、ならびにガラス製造装置
JP2013212942A (ja) * 2012-03-30 2013-10-17 Avanstrate Inc ガラス板の製造方法およびガラス板製造装置
JPWO2014073594A1 (ja) * 2012-11-12 2016-09-08 旭硝子株式会社 溶融ガラス搬送設備要素、溶融ガラス搬送設備要素の製造方法、溶融ガラス搬送設備要素を含むガラス製造装置、およびガラス物品の製造方法
EP2918554A4 (fr) * 2012-11-12 2016-06-15 Asahi Glass Co Ltd Élément d'équipement de transport de verre fondu, procédé pour fabriquer un élément d'équipement de transport de verre fondu, appareil de fabrication de verre comprenant un élément d'équipement de transport de verre fondu et procédé pour fabriquer un produit de verre
US9446976B2 (en) 2012-11-12 2016-09-20 Asahi Glass Company, Limited Molten glass conveying equipment element, method for manufacturing molten glass conveying equipment element, glass manufacturing apparatus comprising molten glass conveying equipment element and method for manufacturing glass product
KR20150085511A (ko) 2012-11-12 2015-07-23 아사히 가라스 가부시키가이샤 용융 유리 반송 설비 요소, 용융 유리 반송 설비 요소의 제조 방법, 용융 유리 반송 설비 요소를 포함하는 유리 제조 장치 및 유리 물품의 제조 방법
WO2014073594A1 (fr) 2012-11-12 2014-05-15 旭硝子株式会社 Élément d'équipement de transport de verre fondu, procédé pour fabriquer un élément d'équipement de transport de verre fondu, appareil de fabrication de verre comprenant un élément d'équipement de transport de verre fondu et procédé pour fabriquer un produit de verre
US20200199005A1 (en) * 2017-09-04 2020-06-25 Nippon Electric Glass Co., Ltd. Method and device for manufacturing a glass article, and a powder for forming a bonded body
WO2019108995A1 (fr) * 2017-12-01 2019-06-06 Corning Incorporated Appareil et procédé de production de verre
US20210032148A1 (en) * 2017-12-01 2021-02-04 Corning Incorporated Apparatus and method for producing glass
JP2021505507A (ja) * 2017-12-01 2021-02-18 コーニング インコーポレイテッド ガラスを製造するための装置および方法
JP7341999B2 (ja) 2017-12-01 2023-09-11 コーニング インコーポレイテッド ガラスを製造するための装置および方法
CN112384480A (zh) * 2018-08-30 2021-02-19 日本电气硝子株式会社 玻璃物品的制造装置及制造方法
CN112384480B (zh) * 2018-08-30 2023-04-04 日本电气硝子株式会社 玻璃物品的制造装置及制造方法
JP2020037494A (ja) * 2018-09-03 2020-03-12 日本電気硝子株式会社 ガラス物品の製造方法
JP7115156B2 (ja) 2018-09-03 2022-08-09 日本電気硝子株式会社 ガラス物品の製造方法
JP2021062990A (ja) * 2019-10-15 2021-04-22 Ａｇｃ株式会社 溶融ガラスの搬送装置、ガラス物品の製造設備、およびガラス物品の製造方法
JP7314761B2 (ja) 2019-10-15 2023-07-26 Ａｇｃ株式会社 溶融ガラスの搬送装置、ガラス物品の製造設備、およびガラス物品の製造方法

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