WO2013125541A1 - Four de fusion de verre, procédé de production de verre fondu, dispositif de production de produit en verre et procédé de production de produit en verre - Google Patents

Four de fusion de verre, procédé de production de verre fondu, dispositif de production de produit en verre et procédé de production de produit en verre Download PDF

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Publication number
WO2013125541A1
WO2013125541A1 PCT/JP2013/054050 JP2013054050W WO2013125541A1 WO 2013125541 A1 WO2013125541 A1 WO 2013125541A1 JP 2013054050 W JP2013054050 W JP 2013054050W WO 2013125541 A1 WO2013125541 A1 WO 2013125541A1
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Prior art keywords
glass
raw material
melting
furnace
material particles
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PCT/JP2013/054050
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English (en)
Japanese (ja)
Inventor
智 大川
達也 山下
酒本　修
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旭硝子株式会社
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Priority to CN201380009918.6A priority Critical patent/CN104125932B/zh
Priority to JP2014500722A priority patent/JP6015741B2/ja
Priority to KR20147021988A priority patent/KR20140130116A/ko
Publication of WO2013125541A1 publication Critical patent/WO2013125541A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B3/00—Charging the melting furnaces
    • C03B3/02—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B3/00—Charging the melting furnaces
    • C03B3/02—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
    • C03B3/026—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet by charging the ingredients into a flame, through a burner or equivalent heating means used to heat the melting furnace
    • 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

Definitions

  • the present invention relates to a glass melting furnace in which raw materials are melted in a high-temperature atmosphere in a furnace and then accumulated to form molten glass, a method for producing molten glass using the glass melting furnace, and a glass including the glass melting furnace
  • the present invention relates to a product manufacturing apparatus and a glass product manufacturing method using the glass product manufacturing apparatus.
  • Patent Document 1 glass raw material particles are melted into molten glass particles in a high-temperature gas-phase atmosphere in a furnace, and the molten glass particles are accumulated to form molten glass (In-air melting method (In- A glass melting furnace using a flight glass melting method is disclosed.
  • a glass raw material particle charging portion is installed downward on the upper wall portion of the furnace body, and a gas phase atmosphere is formed below the glass raw material particle charging portion in the furnace body by melting the glass raw material particles into molten glass particles.
  • a burner is installed as a heating device. According to the air melting method, it is said that the energy consumption of the glass melting process can be reduced to about 1/3 compared to the conventional Siemens type furnace melting method. It has been attracting attention as a technology that can be melted in time and can reduce the size of the melting furnace, omit the heat storage chamber, improve the quality, reduce CO 2 , and shorten the time for changing the glass type.
  • the granulated material which is glass raw material particles
  • the granulation is performed due to the momentum of the flame jet flow and gas release due to the rapid thermal decomposition of the raw material.
  • the body collapses affecting the homogenization of glass products and the reduction of dust.
  • the present invention provides a glass melting furnace using an air melting method, a method for manufacturing molten glass using the glass melting furnace, a glass product manufacturing apparatus including the glass melting furnace, and a glass product manufacturing apparatus.
  • the manufacturing method of the glass product used it aims at suppressing collapse at the time of throwing in a granule into a furnace.
  • the present invention provides a glass melting furnace in which glass raw material particles are melted in a high-temperature atmosphere in the furnace and then accumulated to form a molten glass.
  • a sintered part provided at a position facing the raw material inlet, which forms an atmosphere for sintering the glass raw material particles using a part of the heat of the phase atmosphere.
  • the present invention may have a configuration in which the sintered portion is configured with the upper wall portion of the furnace body projecting upward, and the raw material charging port is disposed above the sintered portion.
  • positioned around this sintered part may be sufficient.
  • the structure provided with two or more said heating apparatuses may be sufficient.
  • positioned diagonally downward toward the said glass raw material particle dropped below the said sintered part may be sufficient.
  • the present invention may be configured such that the heating device is located in a central portion in the planar direction of the furnace body, and the sintered portion and the raw material charging port are arranged around the heating device.
  • the structure provided with two or more said sintering parts and said raw material inlets may be sufficient.
  • the structure which forms a horizontal cross section where the said sintering part is wide toward the lower side may be sufficient.
  • positioned diagonally downward may be sufficient.
  • the present invention relates to a molten glass manufacturing method using a glass melting furnace in which glass raw material particles are melted in a high-temperature atmosphere in a furnace and then accumulated to form a molten glass.
  • the present invention also relates to a method for producing molten glass using a glass melting furnace in which glass raw material particles are melted in a high-temperature atmosphere in the furnace and then accumulated to form molten glass.
  • a charging step of charging raw material particles, a melting step of melting the glass raw material particles through a gas phase atmosphere in a furnace, and the glass raw material particles after the charging step and before the melting step in the gas phase atmosphere A sintering step in which sintering is performed by a sintering treatment atmosphere formed by a part of heat, and an accumulation step in which glass raw material particles melted in the melting step are accumulated at the bottom of the glass melting furnace to form molten glass. It is characterized by including.
  • throwing-in step is performed above the space area
  • melting step is performed under the space area
  • the molten glass has an oxide-based mass percentage display, and the SiO 2 content is 5 to 75%, the Al 2 O 3 content is 7 to 60%, and the CaO content is 7 to 60%. Including a total of 90% or more.
  • the present invention is also a glass product manufacturing apparatus including the glass melting furnace, a molding unit that molds the molten glass manufactured by the glass melting furnace, and a cooling unit that cools the glass product after the molding.
  • the present invention includes a step of producing molten glass after sintering the glass raw material particles using the method for producing molten glass, a step of forming the molten glass, and a step of cooling the glass product after forming. It is also a manufacturing method of the glass product containing.
  • the gas phase atmosphere can be reached. For this reason, the collapse of the glass raw material particles (granulated material) that has reached the gas phase atmosphere consisting of the flame of the combustion burner and the surrounding high-temperature part is suppressed, and the influence on the homogenization of glass products and the reduction of dust is suppressed. it can.
  • the glass raw material particles can be sintered while suppressing the increase.
  • the glass raw material particles can be efficiently sintered while suppressing the horizontal spread of the glass raw material particles.
  • the glass melting furnace 10 of this embodiment manufactures the molten glass G by what is called an in-air melting method.
  • the glass melting furnace 10 mixes glass raw material particles (granulated bodies) GM obtained by mixing raw material powders of glass components according to the target glass composition into a high-temperature gas phase in the furnace body 1. It is set as the molten glass particle U by throwing in an atmosphere and making it melt.
  • the molten glass particles U accumulate on the bottom of the furnace body 1 to form a liquid phase molten glass G.
  • the glass melting furnace 10 constitutes a part of a glass product manufacturing apparatus 30 including a forming apparatus 20.
  • the “gas phase atmosphere” is a high temperature atmosphere formed in the furnace by a heating device such as a combustion burner in the air melting method, and is distinguished from the atmosphere in other regions in the furnace.
  • a heating device such as a combustion burner in the air melting method
  • the heating device refers to a high temperature region including a flame.
  • thermal plasma it means a high temperature region where plasma is generated.
  • the glass melting furnace 10 includes, for example, a rectangular parallelepiped hollow box-type furnace body 1 and a raw material particle charging device 5 (hereinafter referred to as the present specification) installed at an upper end portion (bottom portion 1d) of an upper projecting portion 1c described later of the furnace body 1.
  • the “raw material particle charging device” is also referred to as “raw material particle charging unit”), and a plurality (two in FIG. 1) of combustion burners 7 (heating devices) installed around the lower end of the upper protrusion 1c. ).
  • the furnace body 1 constitutes a wall portion with a refractory material such as a refractory brick, and stores a high-temperature gas phase atmosphere therein and stores a high-temperature molten glass G in a lower portion thereof.
  • the storage part 1b for storing the molten glass G in the lower part of the furnace body 1 is heated at a predetermined temperature (for example, about 1400 ° C.) by the heating from the combustion burner 7 or, if necessary, the heater not shown. The molten state is maintained.
  • An exhaust gas treatment device 3 is connected to a left side wall portion of the furnace body 1 through an exhaust port 2 and an exhaust pipe 2a.
  • a molding apparatus 20 is connected to the right side wall portion of the furnace body 1 (reservoir 1b) through the outlet 4 and the outlet path 4a.
  • the molten glass G in the reservoir 1b is led out of the furnace through the outlet 4 and is sent to the molding apparatus 20 through the outlet 4a.
  • the glass product manufacturing apparatus 30 and the manufacturing method will be described later.
  • the furnace body 1 has an upward projecting portion 1c formed so as to displace a part of the upper wall portion 1a (for example, a central portion in the planar direction) upward.
  • the upper protruding portion 1c has a bottomed cylindrical shape having a central axis (hereinafter simply referred to as an axis) C1 along the vertical direction, and is provided so as to open downward (inside the furnace) with the bottom 1d facing upward.
  • the axis C1 of the upward projecting portion 1c is coaxial with the center axis (hereinafter simply referred to as the axis) C2 of the furnace body 1 in the first embodiment.
  • the upper protruding portion 1c is formed so that the vertical length is longer than the horizontal width.
  • a cylindrical raw material particle charging device 5 is provided that opens the raw material charging port 5a downward in the vertical direction toward the inside of the upper protruding portion 1c (inside the furnace).
  • the raw material particle charging device 5 has a single tube structure made of, for example, metal or ceramic, and is disposed with its central axis (hereinafter simply referred to as an axis) C1 'coaxial with the axis C1 of the upper projecting portion 1c.
  • a raw material charging port 5 a is opened at the lower end of the raw material particle charging device 5.
  • the lower end portion of the raw material particle charging device 5 passes through the bottom 1d of the upper protruding portion 1c and opens the raw material charging port 5a toward the upper protruding portion 1c. Glass raw material particles GM are ejected from the raw material inlet 5a along the axes C1 and C1 'into the upper protrusion 1c.
  • the axes C1 and C1 ' are also straight lines along the direction in which the glass raw material particles GM are charged.
  • the upper protrusion 1c has an internal atmosphere K ′ (an atmosphere other than a gas phase atmosphere.
  • the atmosphere K ′ is an atmosphere in which the glass raw material particles GM are sintered, and is also referred to as “sintering atmosphere”. .)
  • the sintered part 60 has a horizontal cross section smaller than the melting part 50 that accommodates the gas phase atmosphere K by the combustion burner 7 below the upper wall part 1a.
  • the glass raw material particles GM charged into the sintering part 60 from the raw material charging port 5a are subjected to the sintering process while passing through the atmosphere K ′, and then continuously charged into the gas phase atmosphere K in the melting part 50.
  • the sintered part 60 is located above the melting part 50, has a smaller horizontal cross section than the melting part 50, and communicates with the melting part, so that glass raw material particles are obtained using a part of the heat in the gas phase atmosphere. Is provided at a position facing the raw material inlet 5a, that is, facing the raw material inlet 5a and communicating with the raw material inlet 5a.
  • the diffusion of the glass raw material particles GM is suppressed and the sintering process is performed efficiently.
  • the glass raw material particles GM are melted by the gas phase atmosphere K formed in the injection direction of the combustion burner 7 in the melting part 50 to become molten glass particles U, and are accumulated in the storage part 1b of the furnace body 1 to become the molten glass G. .
  • a raw material supplier 8 is connected to the upper side of the raw material particle charging device 5 (that is, on the side opposite to the raw material charging port 5a in the axial direction) via a supply pipe 9.
  • the raw material supplier 8 has a hopper that contains the glass raw material particles GM.
  • a carrier gas is supplied to the supply pipe 9 from a carrier gas supply source (not shown). By this carrier gas, the glass raw material particles GM are conveyed from the hopper side to the raw material particle charging device 5 side.
  • the raw material particle charging device 5 jets the glass raw material particles GM together with the carrier gas into the upward projecting portion 1c. Note that the glass raw material particles GM may be charged by free fall from the raw material particle charging device 5 regardless of the carrier gas. By providing the raw material particle charging device 5 separately from the combustion burner 7, various gases can be used regardless of the combustion conditions of the combustion burner 7, and the component adjustment of the furnace atmosphere is easy.
  • the raw material particle charging device 5 may have a water cooling structure.
  • the combustion burner 7 is an existing oxygen combustion burner in which, for example, a fuel supply nozzle and an oxygen supply nozzle are appropriately arranged, and is provided on the upper wall portion 1a of the furnace body 1 around the upper protruding portion 1c.
  • the combustion burner 7 has a cylindrical shape, and is disposed so as to be inclined with respect to the vertical direction so that its center axis (hereinafter simply referred to as an axis) C3 is closer to the axis C1 of the raw material particle charging device 5 toward the lower side.
  • a flame injection port 7a that is, an energy discharge portion
  • the energy release unit refers to an outlet that releases heat, plasma, or the like as energy in order to form a gas phase atmosphere in the heating device.
  • the axis C3 is also a straight line along the injection direction of the combustion flame F.
  • the lower end portion of the combustion burner 7 penetrates the upper wall portion 1a, opens the flame injection port 7a obliquely downward toward the furnace below the upper wall portion 1a, and injects the combustion flame F along the axis C3.
  • Each combustion burner 7 is arranged rotationally symmetric with respect to the axis C2 of the furnace body 1, for example.
  • Each combustion burner 7 is arrange
  • Each combustion burner 7 may be inclined not only in the side view of FIG. 1 but also in the rotation direction about the axis C2.
  • the number of installed combustion burners 7 is not limited to two, and preferably three or more.
  • a plurality of combustion burners 7 are preferably arranged at equal intervals in the rotation direction about the axis C2 from the viewpoint of improving the temperature symmetry (ie, uniformity) of the gas phase atmosphere.
  • a multi-phase arc plasma generating device constituted by a pair of electrodes for generating thermal plasma may be further provided.
  • the flame injection port 7 a of each combustion burner 7 is arranged separately from the raw material introduction port of the raw material particle charging device 5. Details of the distance between the flame injection port 7a of each combustion burner 7 and the raw material introduction port of the raw material particle charging device 5 will be described later.
  • the adhesion of the glass raw material particles GM to the flame injection port 7a of the combustion burner 7 is suppressed, and the combustion of the combustion burner 7
  • the flame F does not become unstable and the flame injection port 7a is not blocked.
  • the adhering matter to the flame injection port 7a does not fall on the molten glass G in the furnace, and the non-homogenization of the glass due to the composition difference between the adhering matter and the glass melt is suppressed, and the high-quality molten glass G Is obtained.
  • the raw material particle charging device 5 has a single tube structure different from that of the combustion burner 7, the restriction on the particle diameter of the glass raw material particles GM is small, and glass raw material particles GM having a predetermined particle diameter or more can be used. Thus, generation of soot (dust) in the glass melting furnace 10 is suppressed. If there is little soot of glass raw material particle GM, it will be difficult to discharge
  • the combustion burner 7 forms a gas phase atmosphere K at the front end side (the lower side in FIG. 1) of the combustion flame F in the injection direction.
  • the gas phase atmosphere K is composed of the combustion flame F injected by the combustion burner 7 and a high-temperature portion near the combustion flame F.
  • the flame injection port 7 a of the combustion burner 7 is disposed near the lower surface of the upper wall portion 1 a of the glass melting furnace 10.
  • the convection and radiation of the heat of the combustion flame F are received, and the glass An atmosphere K ′ for promoting the sintering of the raw material particles GM is formed.
  • the temperature of the combustion flame F of the combustion burner 7 is set to 1600 ° C. or higher, which is equal to or higher than the melting temperature of silica sand, in order to rapidly gasify and dissipate the gas components contained in the glass raw material particles GM and advance the vitrification reaction. It is preferable.
  • the temperature of the central portion of the gas phase atmosphere K formed by the combustion flame F injected from the combustion burner 7 is about 2000 ° C. when the combustion flame F is, for example, an oxyfuel combustion flame, and 5000 to 20000 when it is a thermal plasma. Reach °C.
  • the temperature of the central portion of the atmosphere K ′ formed in the upward projecting portion 1c is about 1000 to 1300 ° C.
  • the angle ⁇ formed by the axis C1 of the upward projecting portion 1c of the raw material particle charging device 5 and the axis C3 of the combustion burner 7 is an angle in the range of 10 to 50 °, for example 45 °. An angle of about.
  • the molten glass G produced using the glass melting furnace 10 of the present embodiment is not particularly limited in terms of composition as long as it is a glass produced by an air melting method.
  • 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%.
  • the term “to” indicating the above numerical range is used in the sense that the numerical values described before and after it are used as the lower limit value and the upper limit value. Unless otherwise specified, “to” is
  • 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%.
  • borosilicate glass used for heat-resistant containers or physics and chemistry instruments, etc.
  • SiO 2 60 to 85%
  • Al 2 O 3 0 to 5%
  • B 2 O 3 5 to 20%
  • Na 2 O + K 2 O: 2 to 10% are preferable.
  • Other glass compositions are expressed in terms of mass percentage on an oxide basis, with a SiO 2 content of 5 to 75%, an Al 2 O 3 content of 7 to 60%, and a CaO content of 7 to 60%. Including a total of 90% or more.
  • the glass of this composition in the production of the granulated body, the component that acts like a binder when forming the granulated body from the raw material powder particles tends to decrease, but according to the method of the present embodiment, Since a granulated body sinters in the sintering part in a glass melting furnace, the glass of the said composition can be used as a granulated body, and manufacture of molten glass can be performed.
  • the glass raw material particle GM is a granulated body, and an alkali-free glass is applied as an example, silica sand, alumina (Al 2 O 3 ), boric acid (H 3 BO 3 ), magnesium hydroxide (Mg) (OH) 2 ), raw material powder particles such as calcium carbonate (CaCO 3 ), strontium carbonate (SrCO 3 ), and barium carbonate (BaCO 3 ) are prepared so as to match the composition ratio of the target glass.
  • Glass raw material particles GM are obtained as a granulated body of about 30 to 1000 ⁇ m by aggregating by a granulation method.
  • this granulated body may be composed only of raw materials having a mixing ratio corresponding to the target glass component composition, but the granulated body is further mixed with glass cullet powder having the same composition, and this is mixed with glass. It can also be used as raw material particles GM.
  • a glass raw material powder particle of each component described above As a glass raw material powder particle of each component described above, a glass raw material powder particle in the range of 2 to 500 ⁇ m and a solvent such as distilled water are stirred by a ball mill or the like The mixture is stirred for a predetermined time, mixed, pulverized into a thriller, and then spray-dried to obtain glass raw material particles GM in which the glass raw material powder particles of the aforementioned components are dispersed almost uniformly.
  • a dispersant such as 2-aminoethanol is used for the purpose of uniformly dispersing the raw material powder particles, and a PVA (polyvinyl alcohol) or the like is used for the purpose of improving the strength of the granulated raw material.
  • a PVA polyvinyl alcohol
  • the glass raw material particles GM used in the present embodiment can be formed by a dry granulation method such as a tumbling granulation method or a stirring granulation method in addition to the above-mentioned spray dry granulation method.
  • the average particle diameter (weight average) of the glass raw material particles GM is preferably in the range of 30 to 1000 ⁇ m. More preferably, glass raw material particles GM having an average particle diameter (weight average) in the range of 50 to 500 ⁇ m are used, and glass raw material particles GM in the range of 70 to 300 ⁇ m are more preferable.
  • One example of the glass raw material particles GM is enlarged and shown in FIG. 1, but it is preferable that the composition ratio of the glass raw material particles GM substantially matches or approximates the composition ratio of the final glass.
  • the average particle diameter (weight average) of the molten glass particles U in which the glass raw material particles GM are melted is usually about 80% of the average particle diameter of the glass raw material particles GM.
  • the particle size of the glass raw material particles GM is preferably selected from the above-mentioned range from the viewpoint that it can be heated in a short time, the generated gas can be easily diffused, and the composition variation between the particles is reduced.
  • these glass raw material particles GM can contain a refining agent, a colorant, a melting aid, an opacifier, etc. as auxiliary raw materials as required.
  • boric acid and the like in these glass raw material particles GM are easy to evaporate by heating because the vapor pressure at a high temperature is relatively high, so it may be mixed in excess of the composition of the glass as the final product. it can.
  • a clarifier when a clarifier is contained as an auxiliary material, a necessary amount of a clarifier containing one or more elements selected from chlorine (Cl), sulfur (S), and fluorine (F) is required. Can be added.
  • a fining agent tin oxide (SnO 2 ) can be used.
  • conventionally used fining agents such as Sb and As oxides, even if the effect of reducing bubbles is generated, these fining elements are undesirable elements in terms of reducing environmental impact, and their use is It is preferable to reduce in view of the direction of reducing the environmental load.
  • the glass product manufacturing apparatus 30 including the glass melting furnace 10 of the present embodiment derives the molten glass G manufactured in the glass melting furnace 10 from the outlet 4 at a predetermined speed. Accordingly, after introducing into a defoaming device (not shown) and further defoaming, it is transferred to the molding device 20 to be molded into a desired shape. The molded workpiece (molded product) is subjected to mechanical processing such as cutting after cooling to become a predetermined glass product. Since this glass product is formed by the high-quality molten glass G manufactured in the glass melting furnace 10, it is possible to obtain a uniform and high quality.
  • the glass raw material particles are melted in a high temperature atmosphere in the furnace and then accumulated to form a molten glass.
  • Has steps. (1-1) A melting step in which a gas phase atmosphere for melting glass raw material particles is formed in a furnace of a glass melting furnace, and the glass raw material particles are melted in a melting part that contains the gas phase atmosphere.
  • (2-1) Before the melting step, a part of the heat in the gas phase atmosphere is removed in the sintered part located above the melting part and having a horizontal section smaller than the melting part and communicating with the melting part.
  • (3-1) A charging step in which glass raw material particles are charged into the sintered part from a raw material charging port facing the sintered part before the sintering step.
  • grains in the high temperature atmosphere in a furnace, and makes this a molten glass is the following.
  • Each step. (1-2) A charging step of charging glass raw material particles into the glass melting furnace.
  • the charging step is preferably performed above the space region where the sintering step is performed. Moreover, it is preferable that a fusion
  • FIG. 5 is a flowchart showing an embodiment of a glass product manufacturing method using the molten glass manufacturing method of the present embodiment.
  • the manufacturing method of the glass product of this embodiment passes the glass melting process S1 by the manufacturing method of the molten glass using the glass melting furnace 10, Then, it sends the molten glass G obtained by the glass melting process S1 to the shaping
  • the forming step S2 for forming into the shape is performed.
  • the molded product obtained in the molding step S2 is cooled in a slow cooling step S3 using, for example, an air-cooling slow cooling device 21, and then cut into a required length in the cutting step S4, thereby forming a predetermined glass product G5.
  • the glass product manufacturing method (and glass product manufacturing apparatus 30) described above was obtained in the molding product obtained in the molding step S2, the slow cooling product obtained in the slow cooling step S3, or the cutting step S3, as necessary.
  • the glass raw material particles GM are made of a granulated material
  • each of the particles is melted to form molten glass particles U, but the granulated material is directly put into the combustion flame F (frame) of the combustion burner 7.
  • the granulated body may collapse before it becomes the molten glass particles U due to the momentum of the flame jet flow or outgassing due to the rapid thermal decomposition of the raw material.
  • the collapse of the granulate affects the homogenization of the glass product and the reduction of dust (dust). If the glass raw material particles GM have a large amount of dust, the dust is likely to be discharged together with the exhaust gas, and the raw material recovery rate is low.
  • the granulated body before the granulated body reaches the combustion flame F of the combustion burner 7, the granulated body is put into the atmosphere K ′ of the sintered portion 60 in the upper projecting portion 1c in the furnace, and the granulated body is formed. After increasing the strength by sintering the granular material, it is put into a gas phase atmosphere K formed in the flame injection direction of the combustion burner 7. Thereby, even if a granulated body is thrown into the combustion flame F (frame) of the combustion burner 7, the collapse is suppressed, and the homogenization of the glass product and the reduction of dust are achieved. The dust of the glass raw material particles GM is also reduced, the raw material becomes difficult to be discharged together with the exhaust gas, and the raw material recovery rate is increased.
  • the atmosphere K ′ is formed in the furnace body 1 of the glass melting furnace 10 by using heat convection and radiation of the combustion flame F. For this reason, an increase in energy consumption can be suppressed as compared with the case where a separate heating source is provided and the case where sintering is performed outside the furnace body 1.
  • a separate heating source is provided and the case where sintering is performed outside the furnace body 1.
  • the granulated body is left outside the furnace body 1 and heated to a temperature of about 1000 ° C. which is preferable for the sintering temperature of the granulated body.
  • a relatively high-temperature gas phase in the furnace is placed in the upper end portion of the furnace body 1 where the downward flame jet flow of the combustion burner 7 does not reach (that is, in the sintered portion 60 in the upper protruding portion 1c).
  • An atmosphere K ′ using the energy of the atmosphere K is formed.
  • the granulated material put into the furnace reaches the gas phase atmosphere K formed by the combustion burner 7 after being sintered during the flight in the upper protrusion 1c.
  • the granulated body is exposed to the atmosphere K ′ in the furnace as long as possible before reaching the frame of the oxyfuel burner 7, so that the strength is increased by sintering.
  • the outside of the upper protrusion 1c is preferably insulated.
  • the collapse of the granulated body is suppressed.
  • the atmosphere K ′ using the energy in the furnace, an increase in energy consumption can be suppressed as compared with a case where a separate heating source is set.
  • the upper protruding portion 1c forming the atmosphere K ′ partially protrudes from the upper wall portion 1a of the furnace body 1, whereby the height of the upper wall portion 1a of the furnace body 1 is suppressed.
  • a heating source for assisting the sintering in the sintering part 60 may be provided in the case where the temperature of the atmosphere K ′ is insufficient.
  • a high frequency induction coil which is an example of a high frequency induction heating device can be used.
  • the energy consumption is increased by this heating source, there is a merit that the energy consumption is lower than at least when the granulated body is sintered outside the furnace body 1.
  • the inventors of the present invention granulated a granulated body of CaO—Al 2 O 3 —SiO 2 type composition (referred to as CAS type glass) by the above-mentioned spray-dry granulation method, and compared it with an unheated one at 1000 ° C. for 5 hours.
  • the particles vitrified by the air melting method were compared with those subjected to the heat treatment (sintering treatment).
  • the reason why the sintering time is lengthened is that the amount of the granulated body compared is large, so that the granulated body is sufficiently sintered. This is independent of the time required.
  • Table 1 shows the composition of the CAS glass. Hereinafter, examination was performed when the granulated material having the composition shown in Table 1 serving as the base of the CAS glass was used in the apparatus and method of the present embodiment.
  • FIG. 6 is a graph showing changes in the diameter and bulk density of a granulated body when, for example, a granulated body having a diameter of 1 mm is heat-treated at a bulk density of 1 g / cm 3 before being sintered. From this figure, it can be seen that when a granulated body having a bulk density of 1 g / cm 3 and a size of 1 mm is sintered, it changes to a granulated body having a bulk density of about 2 g / cm 3 and a diameter of about 0.8 mm. However, the bulk density of the sintered granule does not exceed the density of the target glass.
  • FIG. 7 is a graph showing the moving distance of the granulated body required for the granulated body to be heated (Tp) to 1000 ° C. and sintered when passing through the atmosphere (Tg) at 1300 ° C.
  • the moving distance of the granulated material corresponds to the distance that the granulated material flies between the center of the flame injection port 7a of each combustion burner 7 and the center of the raw material introducing port of the raw material particle charging device 5.
  • the solid line shows the characteristics of the granulated body having a bulk density of 1 g / cm 3
  • the dotted line shows the characteristics of the granulated body having a bulk density of 1.5 g / cm 3
  • the one-dot chain line shows the bulk density of 2.
  • Equation 1 The characteristics of the granulated body of 0 g / cm 3 are shown respectively.
  • a point P on the solid line in FIG. 7 indicates that a granulated body having a bulk density of 1 g / cm 3 and a diameter of 1 mm reaches 1000 ° C. when progressing 0.8 m in an atmosphere of 1300 ° C.
  • Equation 1 equations for obtaining the moving distance are shown in Equation 1, and parameters used in Equation 1 are shown in Table 2, respectively.
  • the particle velocity v in the flame was integrated for a predetermined time with respect to time t to determine the moving distance, and the particle temperature was determined by substituting the predetermined time for t of Tp.
  • the granulated body is made to be a combustion burner after increasing the strength by sintering the granulated body. 7 can be introduced into the gas phase atmosphere K by the combustion flame F, and the collapse of the granulated body can be suppressed.
  • the glass melting furnace 10 in the above-described embodiment is the one in which the glass raw material particles GM are melted in a high temperature atmosphere in the furnace and then accumulated to form the molten glass G.
  • a raw material particle charging device 5 for charging the glass raw material particles GM into the furnace body 1 from 5a, and the furnace body 1 has a sintered part 60 above the melting part 50 containing the gas phase atmosphere K.
  • the sintered part 60 has a smaller horizontal cross section than the melting part 50 and communicates with the melting part 50, so that the glass raw material particles GM are used by using a part of the heat of the gas phase atmosphere K.
  • Atmosphere K for sintering The raw material particle charging device 5 inputs the glass raw material particles GM into the sintered portion 60 and brings the glass raw material particles GM into the gas phase atmosphere K through the atmosphere K ′. .
  • the sintered portion 60 communicating with the molten portion 50 above the molten portion 50, an atmosphere K ′ using a part of the heat of the gas phase atmosphere K can be easily formed in the sintered portion 60.
  • the glass raw material particles GM can be sintered while suppressing an increase in energy consumption.
  • the glass raw material particles GM can be efficiently sintered while suppressing the horizontal spread.
  • the second embodiment includes a glass melting furnace 110 different from that of the first embodiment.
  • the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the glass melting furnace 110 shown in FIG. 2 also forms the molten glass G by an air melting method.
  • the glass melting furnace 110 is installed at the center of the rectangular parallelepiped hollow box type furnace body 1 and the upper wall 1a of the furnace body 1.
  • a raw material particle charging device 5 installed at each of the upper end portions (bottom portion 1d) of the pair of upper projecting portions 1c of the furnace body 1.
  • the glass melting furnace 110 constitutes a part of a glass product manufacturing apparatus 130 including the molding apparatus 20.
  • Each upper protrusion 1c is provided on both sides of the combustion burner 7, for example, and is arranged with its axis 1C along the vertical direction.
  • a cylindrical raw material particle input device 5 is provided, which opens the raw material input port 5a downward in the vertical direction toward each upper protrusion 1c (inside the furnace).
  • Each raw material particle charging device 5 is arranged so that each axis C1 ′ is coaxial with the axis C1 of the corresponding upward projecting portion 1c, and glass raw material particles GM are ejected from the raw material charging port 5a along the axes C1 and C1 ′.
  • Each raw material particle charging device 5 is arranged rotationally symmetrically with respect to the axis C2 of the furnace body 1, for example.
  • grain input apparatus 5 is good not only as a pair but three or more. From the viewpoint of improving the symmetry (uniformity) of the introduction of the glass raw material particles GM, it is preferable that a plurality of the raw material particle introduction devices 5 are arranged at equal intervals in the rotation direction about the axis C2.
  • the combustion burner 7 has an axis C3 along the vertical direction, is provided on the upper wall portion 1a between the upper projecting portions 1c, and injects the combustion flame F along the axis C3 from the flame injection port 7a.
  • the flame injection port 7 a of the combustion burner 7 is arranged separately from the raw material input port 5 a of each raw material particle input device 5. The details of the distance between the flame injection port 7a of the combustion burner 7 and the raw material charging port 5a of each raw material particle charging device 5 are the same as in the first embodiment.
  • the glass raw material particles GM dropped from the raw material particle charging device 5 into the furnace body 1 are sintered by the atmosphere K ′ formed in the sintered portion 60 in each upper protruding portion 1c. Then, the molten glass particle U is melted by the gas phase atmosphere K formed in the flame injection direction of the combustion burner 7 and is accumulated in the storage portion 1b of the furnace body 1 to become the molten glass G.
  • the glass raw material particles GM are dropped along the combustion flame F of the combustion burner 7, so that the glass raw material particles GM pass through the high-temperature atmosphere around the flame for a relatively long time, and efficiently become the molten glass particles U.
  • the third embodiment includes a glass melting furnace 210 different from that of the first embodiment.
  • the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the glass melting furnace 210 shown in FIG. 3 also forms the molten glass G by an air melting method.
  • a hollow box-shaped furnace body 1 having a rectangular parallelepiped shape and a central portion of the upper bulging portion 1e of the furnace body 1 are provided.
  • One combustion burner 7 installed and a pair of raw material particle input devices 5 installed along the vertical direction at the upper end 1f of the upper bulging portion 1e of the furnace body 1 are provided.
  • the glass melting furnace 210 constitutes a part of a glass product manufacturing apparatus 230 including the molding apparatus 20.
  • the furnace body 1 has an upper bulging portion 1e formed to bulge a part or all of the upper wall portion 1a (indicated by a chain line in FIG. 3) upward.
  • the upper bulging portion 1e has, for example, a truncated pyramid shape coaxial with the furnace body 1, and a lower extending portion 1h extending downward (inside the furnace) is provided at the center of the upper end portion 1f.
  • the downward extending portion 1h has a cylindrical shape along the vertical direction, and is disposed coaxially with the furnace body 1.
  • a cylindrical combustion burner 7 that opens the flame injection port 7a downward in the vertical direction toward the inside of the furnace is held in the downward extending portion 1h.
  • the upper bulging portion 1e constitutes a sintered portion 60 that sinters the glass raw material particles GM in the atmosphere K ′ formed therein.
  • the horizontal cross section of the sintered part 60 becomes the maximum at the lower end part, and has the same size as the horizontal cross section of the melting part 50 below the upper wall part 1a.
  • the horizontal cross section of the sintered part 60 changes so as to become smaller toward the upper side.
  • the combustion burner 7 has an axis C3 along the vertical direction and is coaxially held in the downward extending portion 1h, and injects a combustion flame along the axis C3 from the flame injection port 7a.
  • the raw material particle charging devices 5 are provided on both sides of the combustion burner 7, for example, and are arranged with their respective axes C1 'along the vertical direction. Each raw material particle charging device 5 is provided at the upper end 1f of the upper bulging portion 1e so as to open the raw material charging port 5a vertically downward toward the furnace. Each raw material particle charging device 5 ejects glass raw material particles GM from the raw material charging port 5a along the axis C1 '.
  • Each raw material particle charging device 5 is arranged rotationally symmetrically with respect to the axis C2 of the furnace body 1, for example.
  • grain input apparatus 5 is good not only as a pair but three or more. From the viewpoint of improving the symmetry (uniformity) of the introduction of the glass raw material particles GM, it is preferable that a plurality of the raw material particle introduction devices 5 are arranged at equal intervals in the rotation direction about the axis C2.
  • the flame injection port 7 a of the combustion burner 7 is arranged separately from the raw material input port 5 a of each raw material particle input device 5.
  • the details of the distance between the flame injection port 7a of the combustion burner 7 and the raw material charging port 5a of each raw material particle charging device 5 are the same as in the first embodiment.
  • the glass raw material particles GM dropped from the raw material particle charging device 5 into the furnace body 1 (in the upper bulging portion 1e) are sintered by the atmosphere K ′ formed in the sintering portion 60 in the upper bulging portion 1e. Then, the molten glass particle U is melted by the gas phase atmosphere K formed in the flame injection direction of the combustion burner 7 and is accumulated in the storage portion 1b of the furnace body 1 to become the molten glass G.
  • the glass raw material particles GM are dropped along the combustion flame F of the combustion burner 7 so that they pass through the high-temperature atmosphere around the flame for a relatively long time, and efficiently become the molten glass particles U.
  • the glass raw material particles GM By dropping the glass raw material particles GM on both sides of the combustion flame F of the combustion burner 7, the glass raw material particles GM from the pair of raw material particle charging devices 5 can be efficiently melted by the single combustion burner 7. Since the upper bulging portion 1e forms a wider horizontal section toward the lower side, the heat of the melting portion 50 can be used efficiently.
  • the upper bulging portion 1e forms a pair of sintered portions partitioned by the lower extending portion 1h. That is, a pair of sintered parts is provided corresponding to each raw material particle charging device 5. Also in this case, the horizontal cross section of each sintered part is expanded toward the lower side, and the heat of the melting part 50 can be used efficiently.
  • the fourth embodiment includes a glass melting furnace 310 different from the first and third embodiments.
  • the same components as those of the first and third embodiments are denoted by the same reference numerals and detailed description thereof is omitted. To do.
  • a glass melting furnace 310 shown in FIG. 4 also forms molten glass by an air melting method.
  • the glass melting furnace 310 is installed at the center of a rectangular parallelepiped hollow box type furnace body 1 and an upper bulging portion 1e of the furnace body 1.
  • a pair of raw material particle charging devices 5 installed at an upper portion of the upper bulging portion 1e of the furnace body 1 so as to be inclined with respect to the vertical direction.
  • the glass melting furnace 310 constitutes a part of a glass product manufacturing apparatus 330 including the molding apparatus 20.
  • throwing-in apparatus 5 is provided in the both sides on both sides of the combustion burner 7, for example, and is inclined and arrange
  • a raw material charging port 5 a is opened at the lower end of the raw material particle charging device 5.
  • the axis C1 ' is also a straight line along the loading direction of the glass raw material particles GM.
  • the lower end portion of the raw material particle charging device 5 passes through the inclined portion 1g of the upper bulging portion 1e, and the raw material charging port 5a is opened obliquely downward toward the upper bulging portion 1e (that is, inside the sintered portion 60).
  • the glass raw material particles GM are ejected along the axis C1 ′.
  • Each raw material particle charging device 5 is arranged rotationally symmetrically with respect to the axis C2 of the furnace body 1, for example.
  • throwing-in apparatus 5 is arrange
  • throwing-in apparatus 5 may incline not only in the inclination in the side view of FIG. 4, but in the rotation direction centering on the axis line C2.
  • the number of installed raw material particle input devices 5 is not limited to a pair, and may be three or more. From the viewpoint of improving the symmetry (that is, uniformity) of the introduction of the glass raw material particles GM, a plurality of the raw material particle introduction devices 5 are preferably arranged at equal intervals in the rotation direction around the axis C2.
  • the flame injection port 7 a of the combustion burner 7 is arranged separately from the raw material input port 5 a of each raw material particle input device 5.
  • the details of the distance between the flame injection port 7a of the combustion burner 7 and the raw material charging port 5a of each raw material particle charging device 5 are the same as in the first embodiment.
  • the glass raw material particles GM dropped from the raw material particle charging device 5 into the furnace body 1 (in the upper bulging portion 1e) are sintered by the atmosphere K ′ formed in the sintering portion 60 in the upper bulging portion 1e. Then, the molten glass particle U is melted by the gas phase atmosphere K formed in the flame injection direction of the combustion burner 7 and is accumulated in the storage portion 1b of the furnace body 1 to become the molten glass G.
  • An angle ⁇ ′ formed by the axis C1 ′ of the raw material particle charging device 5 and the axis C3 of the combustion burner 7 and opened upward in a side view is an angle in the range of 10 to 50 °, for example, about 45 °. An angle.
  • the glass raw material particles GM dropped in the gas phase atmosphere K pass through the combustion flames injected from the combustion burners 7 for a relatively long time, and efficiently become the molten glass particles U.
  • the glass raw material particles GM from the pair of raw material particle charging devices 5 can be efficiently melted by the single combustion burner 7. Since the upper bulging portion 1e forms a wider horizontal section toward the lower side, the heat of the melting portion 50 can be used efficiently.
  • the upper bulging portion 1e forms a pair of sintered portions partitioned by the lower extending portion 1h. That is, a pair of sintered parts is provided corresponding to each raw material particle charging device 5. Also in this case, the horizontal cross section of each sintered part is expanded toward the lower side, and the heat of the melting part 50 can be used efficiently.
  • the combustion burner 7 may be a single configuration in the first embodiment.
  • the second to third embodiments there may be a single configuration of the raw material particle charging device 5.
  • the furnace body 1 of the glass melting furnace 10 is not limited to a rectangular parallelepiped shape, and may be, for example, a cylindrical shape. You may provide the auxiliary heater which heats the inside of the sintering part 60. FIG.
  • the present invention is suitable for an air melting method using a granulated body, but as a glass raw material particle GM to be used, a particulate raw material powder and a granulated body of each component of a glass raw material for the intended use are used. It may be a mixture or a glass cullet piece. And the structure in the said embodiment is an example of this invention, A various change is possible in the range which does not deviate from the summary of the said invention.
  • the glass product manufacturing apparatus of the present invention includes a glass melting furnace according to the first to fourth embodiments, a molding means for molding the molten glass manufactured by the glass melting furnace, and a cooling for cooling the glass product after molding. Means.
  • the manufacturing method of the glass product of this invention uses the above-mentioned 1st and 2nd molten glass manufacturing method, the process of manufacturing a molten glass after sintering glass raw material particle, The process of shape
  • 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, glass beads, and other general glass products.
  • the entire contents of the specification, claims, drawings, and abstract of Japanese Patent Application No. 2012-034296 filed on February 20, 2012 are incorporated herein as the disclosure of the present invention. .

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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)
  • Furnace Details (AREA)

Abstract

La présente invention concerne un four de fusion de verre utilisant la fusion en vol, un procédé de production de verre fondu utilisant le four de fusion de verre, un dispositif de production d'un produit en verre, équipé du four de fusion de verre, et un procédé de production d'un produit en verre utilisant le dispositif de production d'un produit en verre, l'effritement d'un corps granuleux, servant de particules de matériau de verre brut, étant minimisé lors du chargement dans un four. Un corps de four (1) inclut une section de frittage (60) au-dessus d'une section de fusion (50) qui contient une atmosphère gazeuse (K). La section de frittage (60) présente une section transversale horizontale plus petite que celle de la section de fusion (50) et est en communication avec la section de fusion (50) et, par conséquent, une partie de la chaleur de l'atmosphère gazeuse (K) est utilisée pour former une atmosphère (K') destinée à fritter des particules de matériau de verre brut (GM). Un dispositif de chargement (5) de particules de matériau brut charge les particules de matériau de verre brut (GM) dans la section de frittage (60) et entraîne les particules de matériau de verre brut (GM) à travers l'atmosphère (K') vers l'atmosphère gazeuse (K).
PCT/JP2013/054050 2012-02-20 2013-02-19 Four de fusion de verre, procédé de production de verre fondu, dispositif de production de produit en verre et procédé de production de produit en verre WO2013125541A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201380009918.6A CN104125932B (zh) 2012-02-20 2013-02-19 玻璃熔融炉、熔融玻璃的制造方法、玻璃制品的制造装置、及玻璃制品的制造方法
JP2014500722A JP6015741B2 (ja) 2012-02-20 2013-02-19 ガラス溶融炉、溶融ガラスの製造方法、ガラス製品の製造装置、およびガラス製品の製造方法
KR20147021988A KR20140130116A (ko) 2012-02-20 2013-02-19 유리 용융로, 용융 유리의 제조 방법, 유리 제품의 제조 장치 및 유리 제품의 제조 방법

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JP2012-034296 2012-02-20

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JP2016536243A (ja) * 2013-10-04 2016-11-24 コーニング インコーポレイテッド Ｒｆプラズマを使用したガラス材料の溶融

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EP3103775B1 (fr) 2014-02-06 2020-04-01 AGC Inc. Procédé de production d'un corps granulé et procédé de production d'un article en verre

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WO2011013594A1 (fr) * 2009-07-27 2011-02-03 旭硝子株式会社 Four de fusion du verre, procédé de production de verre fondu, appareil de production du verre, et procédé de production du verre
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JP2016536243A (ja) * 2013-10-04 2016-11-24 コーニング インコーポレイテッド Ｒｆプラズマを使用したガラス材料の溶融
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