CN105837038A - Super white float glass production method - Google Patents
Super white float glass production method Download PDFInfo
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- CN105837038A CN105837038A CN201610334694.1A CN201610334694A CN105837038A CN 105837038 A CN105837038 A CN 105837038A CN 201610334694 A CN201610334694 A CN 201610334694A CN 105837038 A CN105837038 A CN 105837038A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
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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
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/217—FeOx, CoOx, NiOx
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention relates to a super white float glass production method which comprises the following steps: uniformly mixing quartz sand, aluminum oxide, calcium carbonate, magnesium carbonate, sodium peroxide, sodium persulfate and alkali beryllium carbonate, feeding the mixture into a float glass melting kiln for high-temperature melting so as to obtain melt, clarifying and homogenizing the melt, enabling the melt to flow into a working pool, feeding the melt into a molding tin tank from a flowing groove inside the working pond so as to form a stripy continuous glass plate, implementing an annealing procedure, a surface thermal treatment procedure and a cutting procedure on the stripy continuous glass plate, so as to obtain the super white float glass. The content of Fe2O3 of the super white float glass can be 0.006-0.01%, and the visible light transmittance of the super white float glass can be up to 93.8%; beryllium oxide with a good heat conduction property can be prepared from alkali beryllium carbonate in a high-temperature decomposition manner, the heat conduction property of the float glass can be improved, and the heat conduction coefficient of the float glass can be up to 1.22W/(mk) at 20 DEG C.
Description
Technical field
The present invention relates to ultra-white float glass production method, belong to glassmaking art.
Background technology
Glass simple classification is broadly divided into plate glass and post processed glass.Plate glass is broadly divided into three kinds: i.e. pulling method plate glass (divide and have groove/slotless two kinds), horizontal sheet process plate glass and float glass.Owing to float glass has, thickness is uniform, upper and lower surface is smooth parallel, adds high and the beneficially aspect such as management the factor impact of labor productivity, and float glass is just becoming the main flow of glass manufacture mode.
Interior and exterior finishes at top-grade building (cuts off, door and window, curtain wall etc.) field, museum, exhibition center, the display cabinet of jewellery store, high-grade glass furniture, crystal product (light fixture, decorative lens), solar cell substrates field etc., require that float glass has higher transmitance to sunlight, and above-mentioned field requires that float glass must also have good thermal diffusivity, especially light fixture or can be as the substrate of photo-translating system or the panel etc. of photothermal deformation system (flat solar water heater), the heat conductivity of requirement float glass cannot be below 1W/ (mk) the condition of 20 DEG C.And the visible light transmissivity of common float glass is 82 ~ 83%, its heat conductivity is 0.75W/ (mk) at 20 DEG C.
The height of the transmitance of float glass depends mainly on the impurity such as total iron content for conventional foundation frit side.Owing to inevitably bringing sulfur and iron tramp in raw material and Improving Glass Manufacturing Processes into, and the combination of sulfur and ferrum can form iron sulfide (being often referred to iron sulfide or many iron sulfide) in glass, will affect the optical property visible light transmissivity of float glass.
Generally, the total iron content of common float glass is typically 0.08 ~ 0.18%, and have is even up to 0.3%.So common float glass is observed in green or yellow green from lateral edge.Float glass is the Intrinsic Gettering due to glass structure to the absorption of light, and the absorption containing impurity in float glass and absorption three aspect of atom defect colour center cause.It is main for float glass in visible ray near infrared band scope, the absorption of impurity.Impurity is brought into glass by ferrum and alloys etc. such as equipment in the coloring elements such as the ferrum brought in raw material of float glass, titanium, nickel, chromium, the refractory material being etched in fusion process, the sulfur in melting furnaces fuel, vanadium, ferrum etc., molding and processing.Generally, ferrum element has two kinds of ionic conditions, i.e. Fe in float glass3+And Fe2+, because Fe3+Have two absorption bands, one at 380 ~ 390nm, one at 440 ~ 450nm, but the ferrum element in float glass process can not only exist with a kind of ionic forms, and the reproducibility molten tin bath of float glass further increases it and produces the difficulty controlled.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, it is provided that ultra-white float glass production method, concrete technical scheme is as follows:
Ultra-white float glass production method, sequentially includes the following steps:
Step one: batch mixing
Quartz sand, aluminium oxide, calcium carbonate, magnesium carbonate, sodium peroxide, sodium peroxydisulfate, basic carbonate beryllium are weighed each component according to formula proportion, each component is sufficiently mixed, obtains batch；Wherein, described quartz sand, sodium peroxide, sodium peroxydisulfate, the weighing error of basic carbonate beryllium require to control within 0.04%；
Step 2: melting is processed
Float glass smelting kiln will be sent into after batch mix homogeneously, high temperature melting chemical conversion liquation is carried out in float glass smelting kiln, liquation flows into work pool after clarification homogenizing, liquation chute in work pool enters in molding molten tin bath, forming banding continuous glass sheets, the annealed operation of banding continuous glass sheets, Surface heat-treatent operation, cutting action i.e. obtain described ultra-white float glass.
Improvement as technique scheme, described quartz sand, aluminium oxide, calcium carbonate, magnesium carbonate, sodium peroxide, sodium peroxydisulfate, the proportioning of basic carbonate beryllium be, the quality of quartz sand: the quality of aluminium oxide: the quality of calcium carbonate: the quality of magnesium carbonate: the quality of sodium peroxide: the quality of sodium peroxydisulfate: the quality of basic carbonate beryllium=(80.6 ~ 88.9): (0.7 ~ 0.9): (16.4 ~ 18.7): (10.3 ~ 11.6): (10.9 ~ 11.9): (16.5 ~ 18.8)
:(0.3~0.5)。
As the improvement of technique scheme, the fusion temperature in described float glass smelting kiln is 1550～1585 DEG C, and clarification homogenization temperature is 1400～1415 DEG C, and in molten tin bath, forming temperature is 945～955 DEG C, and annealing temperature is 575～585 DEG C；Described Surface heat-treatent operation is to carry out surface process in the banding continuous glass sheets after annealing is admitted to couveuse, temperature within couveuse is 605～615 DEG C, inside couveuse, also regulate the flow of vital energy in the place of being continually fed into, regulating the flow of vital energy and be made up of sulfur dioxide, oxygen in described place, the flow velocity regulated the flow of vital energy in place is 0.8 ~ 1.0m3/ h, the mass ratio of sulfur dioxide and oxygen in regulating the flow of vital energy in place is (4.8 ~ 6.1): 1.
As the improvement of technique scheme, described aluminium oxide is spherical in shape, and the mean diameter of aluminium oxide is 40nm, and the specific surface area of aluminium oxide is 60 ± 2m2/g。
As the improvement of technique scheme, the SiO in described quartz sand2The percentage ratio accounting for quartz sand gross mass is more than or equal to 92%, the Fe in quartz sand2O3Account for the percentage ratio of quartz sand gross mass less than or equal to 0.01%.
As the improvement of technique scheme, the mean square deviation Con trolling index of described batch is within 0.21.Controlled by this mean square deviation, accomplish highly precisely to weigh each component.
In the present invention, sodium peroxide and sodium peroxydisulfate have strong oxidizing property, are improved the oxidisability of batch by sodium peroxide, sodium peroxydisulfate, thus optimize batch and make its O/R value improve, and control the content of ferrum element, improve the visible light transmissivity of glass.Fe in production process is controlled by sodium peroxide, sodium peroxydisulfate2O3Gross mass percentage composition is 0.006 ~ 0.01%, thus produces the ultra-white float glass of high visible light transmissivity, and this ultra-white float glass is glittering and translucent colourless transparent glass.In production process, raw material is disposably to add float glass smelting kiln, reduces and produces the difficulty controlled.
Sodium peroxide and sodium peroxydisulfate at high temperature decompose generation gas, reduce melting viscosity, promote bubble in liquation to eliminate, improve the mobility of liquation so that in liquation, each component is disperseed evenly.Sodium peroxide decomposes is sodium oxide, and sodium peroxydisulfate decomposes is sodium sulfate.Calcium carbonate and magnesium carbonate at high temperature decompose generation gas, reduce melting viscosity, promote bubble in liquation to eliminate, improve the mobility of liquation so that in liquation, each component is disperseed evenly.Calcium carbonate decomposes is calcium oxide, and magnesium carbonate decomposes is magnesium oxide.SiO in quartz sand2Content is high, Fe2O3Content is low, it is simple to be controlled iron content.Ball-aluminium oxide is not only more dispersible within liquation, and ball-aluminium oxide heat conductivity is good.
Basic carbonate beryllium decomposes is beryllium oxide, and the heat conductivility of beryllium oxide is 6 ~ 7 times of ball-aluminium oxide, and beryllium oxide heat conductivility is high, and the heat conductivity of float glass significantly improves.Further, beryllium oxide has severe toxicity, and basic carbonate beryllium is nontoxic, directly adds and uses beryllium oxide danger high, uses basic carbonate beryllium not only nontoxic pollution-free, and when batch mixing operates, simple and convenient；And basic carbonate beryllium at high temperature decomposes generation gas, reduce melting viscosity, promote bubble in liquation to eliminate, improve the mobility of liquation so that in liquation, each component is disperseed evenly.
By optimizing smelting technology, it is simple to control the content of ferrum element in liquation.The Na ion of Float Glass Surface reacts with sulfur dioxide, the Na ion making Float Glass Surface reduces, internal Na ion is gradually to surface migration, diffusion, form diffusion admittance, Fe ion within float glass migrates along diffusion admittance to Float Glass Surface, and the dioxygen oxidation that Fe ion is processed in gas generates Fe2O3, therefore Float Glass Surface forms the oxide-film of densification, and this oxide-film reduces the reflectance of incident illumination；Meanwhile, this oxide-film has also completely cut off external environment condition to float glass secondary pollution, it is to avoid ferrum element is introduced again into, and makes the visible light transmissivity of float glass improve further.
Beneficial effects of the present invention: the Fe in described ultra-white float glass2O3Content is 0.006 ~ 0.01%, and its visible light transmissivity can reach 93.8%；Utilize basic carbonate beryllium to become, at pyrolytic, the beryllium oxide that heat conductivity is good, improve the heat conductivity of float glass so that it is heat conductivity can reach 1.22W/ (mk) at 20 DEG C.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1
Weigh 80.6Kg quartz sand, 0.7Kg ball-aluminium oxide, 16.4Kg calcium carbonate, 10.3Kg magnesium carbonate, 10.9Kg sodium peroxide, 16.5Kg sodium peroxydisulfate, 0.3Kg basic carbonate beryllium, wherein, the mean diameter of ball-aluminium oxide is 40nm, and the specific surface area of ball-aluminium oxide is 60 ± 2m2/g；SiO in quartz sand2The percentage ratio accounting for quartz sand gross mass is more than or equal to 92%, the Fe in quartz sand2O3Account for the percentage ratio of quartz sand gross mass less than or equal to 0.01%；During weighing, quartz sand, sodium peroxide, sodium peroxydisulfate, the weighing error of basic carbonate beryllium require to control within 0.04%；Each component is sufficiently mixed, obtains batch；Wherein, the mean square deviation Con trolling index of batch is within 0.21.
nullThe batch of mix homogeneously is sent into float glass smelting kiln，High temperature melting chemical conversion liquation is carried out in float glass smelting kiln，Fusion temperature in float glass smelting kiln is 1550～1585 DEG C，Liquation flows into work pool after clarification homogenizing，Clarification homogenization temperature is 1400～1415 DEG C，Liquation chute in work pool enters in molding molten tin bath，Form banding continuous glass sheets，Banding continuous glass sheets forming temperature in molten tin bath is 945～955 DEG C，The annealed operation of banding continuous glass sheets，Annealing temperature is 575～585 DEG C，Banding continuous glass sheets after annealing carries out Surface heat-treatent in being admitted to couveuse，Temperature within couveuse is 605～615 DEG C，Inside couveuse, also regulate the flow of vital energy in the place of being continually fed into，Regulate the flow of vital energy by sulfur dioxide in place、Oxygen forms，The flow velocity regulated the flow of vital energy in place is 0.8 ~ 1.0m3/ h, the mass ratio of sulfur dioxide and oxygen in regulating the flow of vital energy in place is (4.8 ~ 6.1): 1；Banding continuous glass sheets after Surface heat-treatent is cut into described ultra-white float glass.
The thickness of described ultra-white float glass is 6mm, it is seen that light transmission rate is 92.1%, and its heat conductivity is 1.08W/ (mk) at 20 DEG C.
Embodiment 2
Weigh 83.3Kg quartz sand, 0.8Kg ball-aluminium oxide, 17.4Kg calcium carbonate, 10.9Kg magnesium carbonate, 11.4Kg sodium peroxide, 18.1Kg sodium peroxydisulfate, 0.4Kg basic carbonate beryllium, wherein, the mean diameter of ball-aluminium oxide is 40nm, and the specific surface area of ball-aluminium oxide is 60 ± 2m2/g；SiO in quartz sand2The percentage ratio accounting for quartz sand gross mass is more than or equal to 92%, the Fe in quartz sand2O3Account for the percentage ratio of quartz sand gross mass less than or equal to 0.01%；During weighing, quartz sand, sodium peroxide, sodium peroxydisulfate, the weighing error of basic carbonate beryllium require to control within 0.04%；Each component is sufficiently mixed, obtains batch；Wherein, the mean square deviation Con trolling index of batch is within 0.21.
The batch of mix homogeneously is sent into float glass smelting kiln, high temperature melting chemical conversion liquation is carried out in float glass smelting kiln, fusion temperature in float glass smelting kiln is 1565 DEG C, liquation flows into work pool after clarification homogenizing, clarification homogenization temperature is 1410 DEG C, liquation chute in work pool enters in molding molten tin bath, form banding continuous glass sheets, banding continuous glass sheets forming temperature in molten tin bath is 950 DEG C, the annealed operation of banding continuous glass sheets, annealing temperature is 580 DEG C, banding continuous glass sheets after annealing carries out Surface heat-treatent in being admitted to couveuse, temperature within couveuse is 610 DEG C, inside couveuse, also regulate the flow of vital energy in the place of being continually fed into, place regulates the flow of vital energy by sulfur dioxide, oxygen forms, the flow velocity regulated the flow of vital energy in place is 0.9m3/ h, the mass ratio of sulfur dioxide and oxygen in regulating the flow of vital energy in place is 5.2:1；Banding continuous glass sheets after Surface heat-treatent is cut into described ultra-white float glass.
The thickness of described ultra-white float glass is 6mm, it is seen that light transmission rate is 93.8%, and its heat conductivity is 1.16W/ (mk) at 20 DEG C.
Embodiment 3
Weigh 88.9Kg quartz sand, 0.9Kg ball-aluminium oxide, 18.7Kg calcium carbonate, 11.6Kg magnesium carbonate, 11.9Kg sodium peroxide, 18.8Kg sodium peroxydisulfate, 0.5Kg basic carbonate beryllium, wherein, the mean diameter of ball-aluminium oxide is 40nm, and the specific surface area of ball-aluminium oxide is 60 ± 2m2/g；SiO in quartz sand2The percentage ratio accounting for quartz sand gross mass is more than or equal to 92%, the Fe in quartz sand2O3Account for the percentage ratio of quartz sand gross mass less than or equal to 0.01%；During weighing, quartz sand, sodium peroxide, sodium peroxydisulfate, the weighing error of basic carbonate beryllium require to control within 0.04%；Each component is sufficiently mixed, obtains batch；Wherein, the mean square deviation Con trolling index of batch is within 0.21.
The batch of mix homogeneously is sent into float glass smelting kiln, high temperature melting chemical conversion liquation is carried out in float glass smelting kiln, fusion temperature in float glass smelting kiln is 1585 DEG C, liquation flows into work pool after clarification homogenizing, clarification homogenization temperature is 1415 DEG C, liquation chute in work pool enters in molding molten tin bath, form banding continuous glass sheets, banding continuous glass sheets forming temperature in molten tin bath is 955 DEG C, the annealed operation of banding continuous glass sheets, annealing temperature is 585 DEG C, banding continuous glass sheets after annealing carries out Surface heat-treatent in being admitted to couveuse, temperature within couveuse is 615 DEG C, inside couveuse, also regulate the flow of vital energy in the place of being continually fed into, place regulates the flow of vital energy by sulfur dioxide, oxygen forms, the flow velocity regulated the flow of vital energy in place is 1.0m3/ h, the mass ratio of sulfur dioxide and oxygen in regulating the flow of vital energy in place is 6.1:1；Banding continuous glass sheets after Surface heat-treatent is cut into described ultra-white float glass.
The thickness of described ultra-white float glass is 6mm, it is seen that light transmission rate is 92.9%, and its heat conductivity is 1.22W/ (mk) at 20 DEG C.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (6)
1. ultra-white float glass production method, it is characterised in that sequentially include the following steps:
Step one: batch mixing
Quartz sand, aluminium oxide, calcium carbonate, magnesium carbonate, sodium peroxide, sodium peroxydisulfate, basic carbonate beryllium are weighed each component according to formula proportion, each component is sufficiently mixed, obtains batch；Wherein, described quartz sand, sodium peroxide, sodium peroxydisulfate, the weighing error of basic carbonate beryllium require to control within 0.04%；
Step 2: melting is processed
Float glass smelting kiln will be sent into after batch mix homogeneously, high temperature melting chemical conversion liquation is carried out in float glass smelting kiln, liquation flows into work pool after clarification homogenizing, liquation chute in work pool enters in molding molten tin bath, forming banding continuous glass sheets, the annealed operation of banding continuous glass sheets, Surface heat-treatent operation, cutting action i.e. obtain described ultra-white float glass.
Ultra-white float glass production method the most according to claim 1, it is characterized in that: described quartz sand, aluminium oxide, calcium carbonate, magnesium carbonate, sodium peroxide, sodium peroxydisulfate, the proportioning of basic carbonate beryllium be, the quality of quartz sand: the quality of aluminium oxide: the quality of calcium carbonate: the quality of magnesium carbonate: the quality of sodium peroxide: the quality of sodium peroxydisulfate: the quality of basic carbonate beryllium=(80.6 ~ 88.9): (0.7 ~ 0.9): (16.4 ~ 18.7): (10.3 ~ 11.6): (10.9 ~ 11.9): (16.5 ~ 18.8): (0.3 ~ 0.5).
Ultra-white float glass production method the most according to claim 1, it is characterized in that: the fusion temperature in described float glass smelting kiln is 1550～1585 DEG C, clarification homogenization temperature is 1400～1415 DEG C, and in molten tin bath, forming temperature is 945～955 DEG C, and annealing temperature is 575～585 DEG C；Described Surface heat-treatent operation is to carry out surface process in the banding continuous glass sheets after annealing is admitted to couveuse, temperature within couveuse is 605～615 DEG C, inside couveuse, also regulate the flow of vital energy in the place of being continually fed into, regulating the flow of vital energy and be made up of sulfur dioxide, oxygen in described place, the flow velocity regulated the flow of vital energy in place is 0.8 ~ 1.0m3/ h, the mass ratio of sulfur dioxide and oxygen in regulating the flow of vital energy in place is (4.8 ~ 6.1): 1.
Ultra-white float glass production method the most according to claim 1, it is characterised in that: described aluminium oxide is spherical in shape, and the mean diameter of aluminium oxide is 40nm, and the specific surface area of aluminium oxide is 60 ± 2m2/g。
Ultra-white float glass production method the most according to claim 1, it is characterised in that: the SiO in described quartz sand2The percentage ratio accounting for quartz sand gross mass is more than or equal to 92%, the Fe in quartz sand2O3Account for the percentage ratio of quartz sand gross mass less than or equal to 0.01%.
Ultra-white float glass production method the most according to claim 1, it is characterised in that: the mean square deviation Con trolling index of described batch is within 0.21.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108545935A (en) * | 2018-07-17 | 2018-09-18 | 芜湖芬特勘测服务有限公司 | A kind of ultra-clear glasses factory formula and production technology |
| CN108950296A (en) * | 2018-08-23 | 2018-12-07 | 中建材（濮阳）光电材料有限公司 | A kind of preparation method of ultra-white float glass tin liquor additive |
| CN109052931A (en) * | 2018-09-11 | 2018-12-21 | 台玻安徽玻璃有限公司 | A kind of production method, glass and the application of highly endothermic thin float glass |
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| CN102603182A (en) * | 2011-12-29 | 2012-07-25 | 信义光伏产业(安徽)控股有限公司 | Ultra-white float glass and production method thereof |
| CN103253850A (en) * | 2012-02-17 | 2013-08-21 | 信义光伏产业(安徽)控股有限公司 | Float semi-tempered glass production process and product thereof |
| CN104671660A (en) * | 2014-12-11 | 2015-06-03 | 漳州旗滨玻璃有限公司 | Super-white and super-thick float glass and preparation method thereof |
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| WO2010023419A1 (en) * | 2008-09-01 | 2010-03-04 | Saint-Gobain Glass France | Process for obtaining glass and glass obtained |
| CN102603182A (en) * | 2011-12-29 | 2012-07-25 | 信义光伏产业(安徽)控股有限公司 | Ultra-white float glass and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108545935A (en) * | 2018-07-17 | 2018-09-18 | 芜湖芬特勘测服务有限公司 | A kind of ultra-clear glasses factory formula and production technology |
| CN108950296A (en) * | 2018-08-23 | 2018-12-07 | 中建材（濮阳）光电材料有限公司 | A kind of preparation method of ultra-white float glass tin liquor additive |
| CN109052931A (en) * | 2018-09-11 | 2018-12-21 | 台玻安徽玻璃有限公司 | A kind of production method, glass and the application of highly endothermic thin float glass |
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Address after: 233100 Fengyang City, Chuzhou Province town of Si Si Si Industrial Park Applicant after: TG ANHUI GLASS CO., LTD. Address before: 233100 Fengyang City, Suzhou Province town of Si Si Si Industrial Park Applicant before: TG ANHUI GLASS CO., LTD. |
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Application publication date: 20160810 |
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