WO2014080904A1 - フロートガラスの成形装置、及びフロートガラスの製造方法 - Google Patents
フロートガラスの成形装置、及びフロートガラスの製造方法 Download PDFInfo
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- WO2014080904A1 WO2014080904A1 PCT/JP2013/081161 JP2013081161W WO2014080904A1 WO 2014080904 A1 WO2014080904 A1 WO 2014080904A1 JP 2013081161 W JP2013081161 W JP 2013081161W WO 2014080904 A1 WO2014080904 A1 WO 2014080904A1
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- molten tin
- protruding wall
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- float glass
- molten
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/16—Construction of the float tank; Use of material for the float tank; Coating or protection of the tank wall
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/20—Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
Definitions
- the present invention relates to a float glass molding apparatus and a float glass manufacturing method.
- the float glass forming apparatus includes a molten tin tank that accommodates molten tin, and flows molten glass on the molten tin in the molten tin tank to form a strip-shaped glass ribbon.
- the glass ribbon is pulled up from the molten tin in the downstream area of the molten tin tank, and after being gradually cooled, it is cut. In this way, a glass plate is obtained.
- the float glass forming apparatus further includes a roof disposed above the molten tin bath (see, for example, Patent Document 1).
- the roof is formed with a gas supply path for supplying reducing gas to a space between the roof and the molten tin tank (upper space of the molding apparatus).
- the reducing gas reacts with oxygen mixed from the outside into the upper space of the molding apparatus, and suppresses oxidation of molten tin in the molten tin tank.
- a mixed gas containing nitrogen gas and hydrogen gas is generally used as the reducing gas.
- the molten tin contains oxygen as an impurity, and the tin oxide vapor is volatilized from the exposed portion of the molten tin.
- the vaporized tin oxide vapor becomes tin oxide particles when cooled.
- the tin oxide particles may fall on the glass ribbon and cause defects.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a float glass molding apparatus from which a high-quality glass plate can be obtained.
- one embodiment of the present invention provides: In a float glass molding apparatus, comprising a molten tin tank containing molten tin, and forming a ribbon glass plate by flowing molten glass on the molten tin in the molten tin tank, A protruding wall that protrudes from the upper part of the side brick of the molten tin tank and forms a gap between the molten tin in the molten tin tank and an exposed portion that is not covered with the glass ribbon, An air supply pipe for supplying reducing gas to the gap is further provided through the through hole of the protruding wall.
- a float glass forming apparatus from which a high-quality glass plate can be obtained.
- FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is sectional drawing which shows the lower structure of the shaping
- the same or corresponding components are denoted by the same or corresponding reference numerals, and description thereof is omitted.
- the X direction represents the flow direction of the glass ribbon
- the Y direction represents the width direction of the glass ribbon.
- the X direction and the Y direction are directions orthogonal to each other.
- FIG. 1 is a cross-sectional view showing a float glass manufacturing apparatus according to an embodiment of the present invention.
- a float glass manufacturing apparatus 100 includes a melting apparatus 200 that melts a glass raw material 10 to form a molten glass 12, and a molten glass 12 that is supplied from the melting apparatus 200 is formed into a belt-like plate shape. 14 and a slow cooling device 400 that slowly cools the glass ribbon 14 molded by the molding device 300.
- the melting apparatus 200 includes a melting tank 210 that stores the molten glass 12 and a burner 220 that forms a flame above the molten glass 12 stored in the melting tank 210.
- the glass raw material 10 thrown into the melting tank 210 is gradually melted into the molten glass 12 by the radiant heat from the flame formed by the burner 220.
- the molten glass 12 is continuously supplied from the melting tank 210 to the molding apparatus 300.
- the forming apparatus 300 includes a molten tin tank 320 that accommodates molten tin 310.
- Molten glass 12 is continuously supplied onto molten tin 310 in molten tin tank 320.
- the forming apparatus 300 causes the molten glass 12 to flow on the molten tin 310 in the molten tin tank 320 to form a strip-shaped glass ribbon 14.
- the glass ribbon 14 is gradually cooled while flowing in a predetermined direction, and gradually hardens.
- the glass ribbon 14 is pulled up from the molten tin 310 in the downstream area of the molten tin tank 320 and conveyed to the slow cooling device 400 by the lift-out roll 510.
- the slow cooling device 400 gradually cools the glass ribbon 14 formed by the forming device 300.
- the slow cooling device 400 includes, for example, a slow cooling furnace (rare) 410 having a heat insulating structure and a plurality of transport rolls 420 disposed in the slow cooling furnace 410 and transporting the glass ribbon 14 in a predetermined direction.
- the atmospheric temperature in the slow cooling furnace 410 becomes lower as it goes from the inlet to the outlet of the slow cooling furnace 410.
- the atmospheric temperature in the slow cooling furnace 410 is adjusted by a heater 440 or the like provided in the slow cooling furnace 410.
- the glass ribbon 14 carried out from the outlet of the slow cooling furnace 410 is cut into a predetermined size by a cutting machine to obtain a product glass plate.
- FIG. 2 is a cross-sectional view showing a float glass forming apparatus according to an embodiment of the present invention.
- FIG. 3 is a plan view showing a lower structure of a float glass forming apparatus according to an embodiment of the present invention.
- 4 is a cross-sectional view taken along the line IV-IV in FIG.
- the molding apparatus 300 includes a molten tin tank 320 that accommodates molten tin 310, a roof 302 that is disposed above the molten tin tank 320, and the like.
- the roof 302 is provided with a gas supply path 330 that supplies a reducing gas to a space 304 (an upper space of the molding apparatus 300) between the roof 302 and the molten tin tank 320.
- a heater 332 as a heating source is inserted into the gas supply path 330.
- the gas supply path 330 supplies reducing gas to the upper space 304 of the molding apparatus 300 in order to suppress oxidation of the molten tin 310.
- the reducing gas contains, for example, 1 to 15% by volume of hydrogen gas and 85 to 99% by volume of nitrogen gas.
- the upper space 304 of the molding apparatus 300 has a pressure higher than the atmospheric pressure in order to limit the mixing of outside air.
- a plurality of heaters 332 are provided, for example, at intervals in the flow direction (X direction) and the width direction (Y direction) of the glass ribbon 14.
- the output of the heater 332 is controlled so that the temperature of the glass ribbon 14 becomes lower from the upstream side toward the downstream side.
- the output of the heater 332 is controlled so that the thickness of the glass ribbon 14 is uniform in the width direction.
- the molten tin tank 320 includes a metal casing 322 that opens upward, and a bottom brick 324 and a side brick 326 installed in the casing 322.
- the casing 322 is for preventing external air from being mixed.
- the lower surface of the casing 322 is exposed to the outside air and naturally cooled.
- the bottom brick 324 protects the inner bottom surface of the casing 322, and the side brick 326 protects the inner side surface of the casing 322.
- a plurality of bottom bricks 324 are two-dimensionally arranged in the X direction and the Y direction.
- a plurality of side bricks 326 are arranged in a square ring along the inner side surface of the casing 322 so as to surround the plurality of bottom bricks 324.
- the upper surface of the molten tin 310 in the molten tin tank 320 includes a wide wide area Z1, a middle area Z2 in which the width gradually decreases, and a narrow narrow area Z3 from the upstream side.
- the temperature of the wide area Z1 is set to 700 ° C. or higher in the case of alkali-containing glass. Further, the temperature of the wide area Z1 is set to 900 ° C. or more in the case of alkali-free glass.
- the upper surface of the molten tin 310 in the molten tin tank 320 includes an exposed portion 311 that is not covered with the glass ribbon 14 and a covered portion 312 that is covered with the glass ribbon 14.
- the exposed portions 311 are on both sides in the width direction of the glass ribbon 14 as shown in FIG.
- the forming apparatus 300 protrudes from the upper portion of the side brick 326 of the molten tin tank 320 and forms a protruding wall 340 that forms a gap 306 with the exposed portion 311 of the molten tin 310 in the molten tin tank 320.
- the protruding wall 340 has, for example, a plate shape and is provided horizontally above the molten tin 310.
- the protruding wall 340 restricts the contact between the oxygen gas mixed from the outside into the space above the protruding wall 340 and the molten tin 310, and suppresses an increase in the oxygen concentration in the molten tin 310.
- the protruding wall 340 receives the tin oxide particles 314 falling from above, and prevents the tin oxide particles 314 from dropping onto the molten tin 310.
- the protruding wall 340 of this embodiment is provided horizontally with respect to the liquid level of the molten tin 310, for example, it may be provided obliquely with respect to the liquid level of the molten tin 310.
- the molding apparatus 300 further includes an air supply pipe 350 that supplies a reducing gas to the gap 306 between the protruding wall 340 and the exposed portion 311 of the molten tin 310 through the through hole of the protruding wall 340.
- the reducing gas in the supply pipe 350 includes, for example, hydrogen gas (H 2 ).
- the reducing gas in the supply pipe 350 may be a mixed gas containing an inert gas such as nitrogen gas (N 2 ), or may be the same type of gas as the reducing gas in the gas supply path 330 for cost reduction.
- the reducing gas in the supply pipe 350 may be a high-temperature gas so as not to cool the molten tin 310 or the glass ribbon 14, and a band heater may be wound around the supply pipe 350.
- the supply pipe 350 supplies the reducing gas to the gap 306 between the protruding wall 340 and the exposed portion 311 of the molten tin 310, so that the composition of the atmosphere in contact with the exposed portion 311 of the molten tin 310 is changed to a desired composition. Can be adjusted. Therefore, as will be described in detail later, volatilization of tin oxide vapor (SnO) evaporated from the exposed portion 311 of the molten tin 310 can be restricted, and the oxygen concentration in the molten tin 310 can be reduced.
- tin oxide vapor SnO
- the reducing gas (for example, H 2 ) supplied from the supply pipe 350 to the gap 306 reacts with the tin oxide vapor (SnO) evaporated from the exposed portion 311 of the molten tin 310, and the tin vapor (Sn) and water vapor (H 2 ). O).
- the amount of tin vapor in the gap 306 exceeds the saturation vapor amount, the newly generated tin vapor becomes tin droplets and falls onto the molten tin 310.
- water vapor is exhausted to the outside of the molding apparatus 300 through the upper space 304 of the molding apparatus 300 together with the unreacted reducing gas.
- the reducing gas (for example, H 2 ) supplied from the supply pipe 350 to the gap 306 decomposes the tin oxide vapor (SnO) evaporated from the exposed portion 311 of the molten tin 310, and volatilizes the tin oxide vapor. Suppress. Therefore, the fall of the tin oxide particles that can be generated from the tin oxide vapor onto the glass ribbon 14 can be suppressed. Volatilization of the tin oxide vapor (SnO) from the molten tin 310 is likely to occur at 700 ° C. or higher, is remarkable at 800 ° C. or higher, and is particularly remarkable at 1000 ° C. or higher.
- the reducing gas for example, H 2
- the reducing gas supplied from the supply pipe 350 to the gap 306 comes into contact with the exposed portion 311 of the molten tin 310 and reacts with oxygen in the molten tin 310 to generate water vapor.
- the water vapor is discharged together with the unreacted reducing gas through the upper space 304 of the molding apparatus 300 to the outside of the molding apparatus 300.
- the reducing gas for example, H 2
- the reducing gas supplied from the supply pipe 350 to the gap 306 reduces the oxygen concentration in the molten tin 310. Therefore, the amount of tin oxide vapor that evaporates from the exposed portion 311 of the molten tin 310 can be reduced.
- the hydrogen gas concentration (volume%) in the reducing gas supplied from the supply pipe 350 to the gap 306 is the hydrogen gas concentration (volume) in the reducing gas supplied from the gas supply path 330 to the upper space 304 of the molding apparatus 300. %) Is preferred. Compared with the case where the supply pipe 350 is not provided, the reducing power of the atmosphere in contact with the exposed portion 311 of the molten tin 310 is increased.
- the reducing gas supplied from the supply pipe 350 to the gap 306 may be substantially composed only of hydrogen gas, and may have a hydrogen gas concentration of 99% by volume or more.
- the reducing gas of the supply pipe 350 of this embodiment contains hydrogen gas as a gas which has a reducing power
- the gas which has a reducing power is not limited to hydrogen gas.
- the reducing gas in the supply pipe 350 may include acetylene gas (C 2 H 2 ) as a gas having a reducing power.
- Acetylene gas has a higher reducing power than hydrogen gas.
- the acetylene gas concentration (volume%) in the reducing gas supplied from the supply pipe 350 to the gap 306 is the hydrogen gas in the reducing gas supplied from the gas supply path 330 to the upper space 304 of the molding apparatus 300. It may be lower than the concentration (volume%).
- it is sufficient that the reducing power of the atmosphere in contact with the exposed portion 311 of the molten tin 310 is increased.
- the protruding wall 340 may be formed of carbon (C) and exposed to a reducing gas supplied from the supply pipe 350 to the gap 306.
- Carbon has a reducing power and generates carbon monoxide gas (CO) in an environment having a low oxygen concentration.
- the carbon reacts with the tin oxide vapor (SnO) evaporated from the exposed portion 311 of the molten tin 310 to generate tin vapor (Sn) and carbon monoxide gas (CO).
- SnO tin oxide vapor
- CO carbon monoxide gas
- the amount of tin vapor in the gap 306 exceeds the saturation vapor amount, the newly generated tin vapor becomes tin droplets and falls onto the molten tin 310 in the molten tin tank 320.
- the carbon monoxide gas is exhausted to the outside of the molding apparatus 300 through the upper space 304 of the molding apparatus 300 together with the unreacted reducing gas.
- the protruding wall 340 formed of carbon decomposes the tin oxide vapor (SnO) evaporated from the exposed portion 311 of the molten tin 310 and suppresses the volatilization of the tin oxide vapor. Therefore, the fall of the tin oxide particles that can be generated from the tin oxide vapor onto the glass ribbon 14 can be suppressed.
- the reduction reaction with carbon tends to proceed at 450 ° C. or higher.
- the protruding wall 340 formed of carbon has good wettability with the molten glass, so that the flow of the glass ribbon 14 is disturbed, and when the glass ribbon 14 comes into contact with the protruding wall 340, the flowability of the glass ribbon 14 is increased. Hard to block.
- the protruding wall 340 may be divided into a plurality of blocks 341 to 346 arranged continuously along the flow direction (X direction) of the glass ribbon 14 as shown in FIG. Since each block 341 to 346 can be installed, the installation work is easy.
- the protruding wall 340 may be provided in the high temperature wide area Z1. Since the temperature of the wide area Z1 is generally 700 ° C. or higher at which the vaporization of tin oxide vapor (SnO) starts, oxygen-containing gas (for example, water vapor or carbon monoxide gas) and tin droplets are separated from the tin oxide vapor. The reaction to produce proceeds.
- oxygen-containing gas for example, water vapor or carbon monoxide gas
- the X-direction dimension L1 of the protruding wall 340 may be 10% or more of the X-direction dimension L2 of the molten tin 310 in the molten tin tank 320, preferably 30% or more, and 50% or more of L2. Is more preferably 70% or more of L2, and particularly preferably 90% or more of L2.
- the protruding wall 340 may be provided at a position that does not overlap the glass ribbon 14 when viewed from above. An operator can confirm the position of the side end of the glass ribbon 14.
- the distance W (see FIG. 4) in the glass ribbon width direction (Y direction) between the front end of the protruding wall 340 and the side end of the glass ribbon 14 sufficiently obtains the effect of the reducing gas supplied to the gap 306. Therefore, for example, it is 150 mm or less, preferably 100 mm or less, more preferably 50 mm or less, and particularly preferably 25 mm or less.
- interval W is larger than 0 mm, for example, Preferably it is 10 mm or more, More preferably, it is 15 mm or more in order to confirm the position of the side end of the glass ribbon 14.
- the part which does not need to confirm the position of the side end of the glass ribbon 14 may overlap with the protruding wall 340A when viewed from above. That is, the tip of the protruding wall 340 ⁇ / b> A may have both a portion that overlaps the glass ribbon 14 and a portion that does not overlap the glass ribbon 14 when viewed from above, and may have an uneven shape.
- the Y-direction dimension V of the region where the protruding wall 340 ⁇ / b> A and the glass ribbon 14 overlap when viewed from above is exposed to the reducing gas having a strong reducing power supplied from the air supply pipe 350. In order to suppress this, it is 150 mm or less, preferably 100 mm or less, more preferably 50 mm or less, and particularly preferably 25 mm or less (FIG. 8).
- An interval H (see FIG. 4) between the lower surface of the protruding wall 340 and the exposed portion 311 of the molten tin 310 is, for example, 100 mm or less, preferably 50 mm or less, more preferably 25 mm, in order to suppress an increase in the ventilation frequency described later. Hereinafter, it is more preferably 10 mm or less. Further, the distance H is larger than, for example, 7 mm in order to prevent contact between the protruding wall 340 and the glass ribbon 14 because the equilibrium thickness of the molten glass in a natural state without external force is about 7 mm.
- the ventilation frequency per hour of the gap 306 between the protruding wall 340 and the molten tin 310 is too small, the purification process is not sufficiently performed, and if it is too large, the cost is increased. Is 8-10 times.
- the ventilation frequency is calculated by the ratio of the volume (Nm 3 ) of the reducing gas supplied to the gap 306 during one hour in the standard state (1 atm, 25 ° C.) and the volume of the gap 306.
- FIG. 5 is a cross-sectional view showing the lower structure of the float glass forming apparatus according to the first modification, and corresponds to FIG.
- the molding apparatus 1300 shown in FIG. 5 is different from the molding apparatus 300 shown in FIG. 4 in that it further includes a vertical wall 360 protruding from the lower surface of the protruding wall 340.
- the difference will be mainly described.
- the vertical wall 360 protrudes from the lower surface of the protruding wall 340.
- the vertical wall 360 may be formed integrally with the protruding wall 340. As shown in FIG. 5, the vertical wall 360 may extend downward from the distal end of the protruding wall 340, or may extend downward from the middle between the distal end and the proximal end of the protruding wall 340.
- the vertical wall 360 may be formed from the upstream end to the downstream end of the protruding wall 340 along the side edge of the glass ribbon 14.
- the vertical wall 360 perpendicular to the liquid surface of the molten tin 310 is provided as the wall protruding from the lower surface of the protruding wall 340.
- the wall is oblique to the liquid surface of the molten tin 310.
- a wall may be provided.
- the through hole of the protruding wall 340 to which the tip of the air supply pipe 350 is connected is located between the side brick 326 that supports the protruding wall 340 and the vertical wall 360. Therefore, the reducing gas supplied from the supply pipe 350 to the gap 306 is likely to spread throughout the gap 306 along the vertical wall 360.
- the vertical wall 360 may be provided at a position that does not overlap the glass ribbon 14 when viewed from above.
- the gap G in the glass ribbon width direction (Y direction) between the vertical wall 360 and the side edge of the glass ribbon 14 is, for example, 150 mm or less in order to sufficiently obtain the effect of reducing gas supplied to the gap 306. Is 100 mm or less, more preferably 50 mm or less, and particularly preferably 25 mm or less. Further, the gap G is, for example, larger than 0 mm, preferably 10 mm or more, and more preferably 15 mm or more in order to confirm the position of the side end of the glass ribbon 14.
- the vertical wall 360 is provided above the molten tin 310 and the glass ribbon 14 so as not to hinder the flow of the molten tin 310 and the glass ribbon 14.
- the distance h between the lower end of the vertical wall 360 and the exposed portion 311 of the molten tin 310 is preferably 50 mm or less so that the reducing gas supplied from the supply pipe 350 to the gap 306 can easily reach the entire gap 306. More preferably, it is 25 mm or less, More preferably, it is 10 mm or less. Further, the distance h is larger than, for example, 7 mm in order to prevent contact between the vertical wall 360 and the glass ribbon 14 because the equilibrium thickness of the molten glass in a natural state without external force is about 7 mm.
- the vertical wall 360 may protrude from the lower surface of the protruding wall 340 ⁇ / b> A that partially overlaps the glass ribbon 14 when viewed from above. Since the vertical wall 360 is easier to contact the glass ribbon 14 than the protruding wall 340A, the vertical wall 360 may be provided at a position that does not overlap the glass ribbon 14 when viewed from above, unlike the protruding wall 340A. It is also possible to suppress the glass ribbon 14 from being exposed to a reducing gas having a strong reducing power supplied from the air supply pipe 350.
- the gap G in the glass ribbon width direction (Y direction) between the vertical wall 360 and the side edge of the glass ribbon 14 may be in the above range.
- the vertical wall 360 ⁇ / b> A may have a portion overlapping the glass ribbon 14 when viewed from above, similarly to the protruding wall 340 ⁇ / b> A.
- This portion protrudes from the side end of the glass ribbon 14 by a distance F inward in the width direction of the glass ribbon 14.
- the distance F is 150 mm or less, preferably 100 mm or less, more preferably 50 mm or less, and particularly preferably 25 mm or less in order to prevent the glass ribbon 14 from being exposed to a reducing gas having a strong reducing power supplied from the air supply pipe 350. It is.
- FIG. 6 is a plan view showing the lower structure of the float glass forming apparatus according to the second modification, and corresponds to FIG.
- the molding apparatus 2300 shown in FIG. 6 further includes an exhaust pipe 352 that exhausts the gas in the gap 306 between the protruding wall 340 and the exposed portion 311 of the molten tin 310 through the through hole of the protruding wall 340. This is different from the molding apparatus 300 shown in FIG. Hereinafter, the difference will be mainly described.
- the exhaust pipe 352 guides the reducing gas supplied from the air supply pipe 350 to the gap 306 to the exhaust pipe 352. Therefore, the reducing gas tends to spread throughout the gap 306.
- An intake source may be provided at the proximal end of the exhaust pipe 352. Further, the exhaust pipe 352 prevents the glass ribbon 14 from being exposed to a reducing gas having a strong reducing power supplied from the air supply pipe 350.
- the positions of the supply pipe 350 and the exhaust pipe 352 are not limited to those in FIG. 6. For example, the positions of the supply pipe 350 and the exhaust pipe 352 in FIG. 6 may be reversed.
- a plurality of air supply pipes 350 and exhaust pipes 352 may be provided.
- a vertical wall 360 may be provided on the lower surface of the protruding wall 340 to which the exhaust pipe 352 is connected, as in the first modification.
- the through hole of the protruding wall 340 to which the distal end of the exhaust pipe 352 is connected is located between the side brick 326 that supports the protruding wall 340 and the vertical wall 360.
- FIG. 7 is a cross-sectional view showing a lower structure of a float glass forming apparatus according to a third modification, and corresponds to FIG.
- the molding apparatus 3300 shown in FIG. 7 includes a projecting wall 347 including a projecting wall main body 348 formed of carbon and an antioxidant film 349 that protects the projecting wall main body 348, and the molding apparatus 300 shown in FIG. Is different. Hereinafter, the difference will be mainly described.
- the protruding wall body 348 is made of carbon.
- the protruding wall main body 348 is provided with an antioxidant film 349 in order to suppress the burning of carbon.
- the antioxidant film 349 is formed of ceramics such as silicon carbide (SiC). As a method for forming the antioxidant film 349, for example, there is a thermal spraying method or the like. The antioxidant film 349 may cover the entire surface of the protruding wall 340.
- the vertical wall 360 when the vertical wall 360 protrudes from the lower surface of the protruding wall 340, the vertical wall 360 may be composed of a vertical wall body made of carbon and an antioxidant film that protects the vertical wall body.
- the protruding wall main body and the vertical wall main body may be integrally formed.
- the protruding wall 340 of the above embodiment is formed of carbon, but may be formed of ceramics, and the protruding wall 340 may be made of a material having heat resistance.
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Abstract
Description
溶融スズを収容する溶融スズ槽を備え、該溶融スズ槽内の溶融スズ上で溶融ガラスを流動させて帯板状のガラスリボンを形成する、フロートガラスの成形装置において、
前記溶融スズ槽のサイド煉瓦の上部から突出し、前記溶融スズ槽内の溶融スズのうち前記ガラスリボンで覆われていない露出部分との間に隙間を形成する突出壁と、
該突出壁の貫通孔を介して、前記隙間に還元性ガスを供給する給気管とをさらに備える。
14 ガラスリボン
100 フロートガラスの製造装置
300 フロートガラスの成形装置
302 ルーフ
304 ルーフと溶融スズ槽との間の空間(成形装置の上部空間)
306 突出壁と溶融スズとの間の隙間
310 溶融スズ
311 露出部分
312 被覆部分
320 溶融スズ槽
322 ケーシング
324 ボトム煉瓦
326 サイド煉瓦
340 突出壁
348 突出壁本体
349 酸化防止膜
350 給気管
352 排気管
360 突出壁の下面から突出する壁(鉛直壁)
Claims (6)
- 溶融スズを収容する溶融スズ槽を備え、該溶融スズ槽内の溶融スズ上で溶融ガラスを流動させて帯板状のガラスリボンを形成する、フロートガラスの成形装置において、
前記溶融スズ槽のサイド煉瓦の上部から突出し、前記溶融スズ槽内の溶融スズのうち前記ガラスリボンで覆われていない露出部分との間に隙間を形成する突出壁と、
該突出壁の貫通孔を介して、前記隙間に還元性ガスを供給する給気管とをさらに備える、フロートガラスの成形装置。 - 前記溶融スズ槽の上方に配設されるルーフと、
該ルーフに形成され、該ルーフと前記溶融スズ槽との間の空間に還元性ガスを供給するガス供給路とをさらに備え、
前記給気管から前記隙間に供給される還元性ガス中の水素ガス濃度が、前記ガス供給路から前記空間に供給される還元性ガス中の水素ガス濃度よりも高い、請求項1に記載のフロートガラスの成形装置。 - 前記突出壁の下面から突出する壁をさらに備え、
前記給気管の先端部が接続される前記突出壁の貫通孔は、該突出壁を支持するサイド煉瓦と、該突出壁の下面から突出する壁との間に位置する、請求項1又は2に記載のフロートガラスの成形装置。 - 前記突出壁は、カーボンで形成され、前記給気管から前記隙間に供給される還元性ガスに曝される、請求項1~3のいずれか一項に記載のフロートガラスの成形装置。
- 前記突出壁は、カーボンで形成される突出壁本体と、該突出壁本体を保護する酸化防止膜とを有する、請求項1~3のいずれか一項に記載のフロートガラスの成形装置。
- 請求項1~5のいずれか一項に記載のフロートガラスの成形装置を用いてガラス板を製造する、フロートガラスの製造方法。
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CN (1) | CN104718166B (ja) |
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WO (1) | WO2014080904A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106242251A (zh) * | 2015-06-05 | 2016-12-21 | 旭硝子株式会社 | 浮法玻璃制造方法和浮法玻璃制造装置 |
CN109368994A (zh) * | 2018-11-27 | 2019-02-22 | 中国洛阳浮法玻璃集团有限责任公司 | 一种具有减少浮法玻璃板面锡缺陷的吸附装置 |
CN113582516A (zh) * | 2021-07-29 | 2021-11-02 | 河南旭阳光电科技有限公司 | 一种锡槽及其清洁方法 |
CN114349316A (zh) * | 2021-12-20 | 2022-04-15 | 蚌埠中光电科技有限公司 | 浮法电子玻璃保护气实施装置及其操作方法 |
Families Citing this family (2)
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CN108863025A (zh) * | 2018-09-25 | 2018-11-23 | 台玻安徽玻璃有限公司 | 一种浮法玻璃制备装置及利用该装置制备浮法玻璃的方法 |
CN108911486B (zh) * | 2018-10-15 | 2023-08-04 | 海南海控特玻科技有限公司 | 浮法玻璃锡槽全自动空气净化器 |
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- 2013-11-19 KR KR1020157009572A patent/KR20150087189A/ko not_active Application Discontinuation
- 2013-11-19 CN CN201380053627.7A patent/CN104718166B/zh active Active
- 2013-11-19 WO PCT/JP2013/081161 patent/WO2014080904A1/ja active Application Filing
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GB1011902A (en) * | 1962-12-07 | 1965-12-01 | Glaverbel | Improvements in or relating to the manufacture of glass ribbon |
US3462253A (en) * | 1968-03-20 | 1969-08-19 | Ppg Industries Inc | Manufacture of float glass using enclosed bath zones |
JPH11278856A (ja) * | 1998-03-31 | 1999-10-12 | Asahi Glass Co Ltd | フロート板ガラス製造装置 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106242251A (zh) * | 2015-06-05 | 2016-12-21 | 旭硝子株式会社 | 浮法玻璃制造方法和浮法玻璃制造装置 |
CN106242251B (zh) * | 2015-06-05 | 2022-01-04 | Agc株式会社 | 浮法玻璃制造方法和浮法玻璃制造装置 |
CN109368994A (zh) * | 2018-11-27 | 2019-02-22 | 中国洛阳浮法玻璃集团有限责任公司 | 一种具有减少浮法玻璃板面锡缺陷的吸附装置 |
CN109368994B (zh) * | 2018-11-27 | 2024-01-26 | 中国洛阳浮法玻璃集团有限责任公司 | 一种具有减少浮法玻璃板面锡缺陷的吸附装置 |
CN113582516A (zh) * | 2021-07-29 | 2021-11-02 | 河南旭阳光电科技有限公司 | 一种锡槽及其清洁方法 |
CN114349316A (zh) * | 2021-12-20 | 2022-04-15 | 蚌埠中光电科技有限公司 | 浮法电子玻璃保护气实施装置及其操作方法 |
Also Published As
Publication number | Publication date |
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KR20150087189A (ko) | 2015-07-29 |
JP2016026978A (ja) | 2016-02-18 |
CN104718166B (zh) | 2017-07-14 |
TW201433548A (zh) | 2014-09-01 |
CN104718166A (zh) | 2015-06-17 |
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