CN115043575A - Method for preparing ultrathin glass by using waste glass containing organic impurities - Google Patents
Method for preparing ultrathin glass by using waste glass containing organic impurities Download PDFInfo
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- 239000011521 glass Substances 0.000 title claims abstract description 210
- 239000002699 waste material Substances 0.000 title claims abstract description 108
- 239000012535 impurity Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000011065 in-situ storage Methods 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 11
- 238000000137 annealing Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000005385 borate glass Substances 0.000 claims description 2
- 239000005365 phosphate glass Substances 0.000 claims description 2
- 239000005368 silicate glass Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 10
- 238000009835 boiling Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000000151 deposition Methods 0.000 abstract description 4
- 238000007158 vacuum pyrolysis Methods 0.000 abstract description 4
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 32
- 238000002834 transmittance Methods 0.000 description 12
- 238000005245 sintering Methods 0.000 description 11
- 235000013555 soy sauce Nutrition 0.000 description 11
- 229910052593 corundum Inorganic materials 0.000 description 10
- 239000010431 corundum Substances 0.000 description 10
- 239000008187 granular material Substances 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004566 building material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
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- 239000000843 powder Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011494 foam glass Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- 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
- C03B5/005—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture of glass-forming waste materials
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/225—Refining
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of solid waste resource recovery, and particularly relates to a method for preparing ultrathin glass by using waste glass containing organic impurities. The method comprises the steps of carrying out vacuum gradient heat treatment on crushed waste glass particles containing organic impurities, and carrying out vacuum pyrolysis reaction on organic impurities on the surfaces of the waste glass to form harmless gas to be removed from the surfaces of the waste glass; further raising the temperature, melting and liquefying the waste glass subjected to impurity removal, boiling and clarifying, and depositing in situ step by step to finally generate ultrathin glass; realizes green and efficient removal of organic impurities on the surface of the waste glass and high value-added recycling of the waste glass. In addition, the method is simple to operate, can directly prepare the waste glass containing organic impurities into the ultrathin glass with high added value without complex cleaning, impurity removal and other pretreatment, and is very suitable for industrialized large-scale production.
Description
Technical Field
The invention belongs to the technical field of solid waste resource recovery. And more particularly, to a method for manufacturing ultra-thin glass using waste glass containing organic impurities.
Background
The waste glass is an important component of urban solid waste, and in China, the recovery rate of the waste glass is only 45.2 percent and is far lower than that of the waste glass of more than 80 percent in developed countries. Meanwhile, the output of waste glass in China still increases at a rate of 3000 million tons per year, so that a large amount of waste glass is stacked in the field or a refuse landfill. Because the glass is extremely stable in property and the natural degradation time is more than thousand years, a large amount of land resources are wasted by the opposite side or landfill of waste glass. Moreover, the heavy metals of lead, cadmium and the like in the waste glass can enter soil and water bodies due to long-time accumulation, so that the ecological environment is damaged. On the other hand, the advantage of the stable property of the waste glass also enables most of glass materials to still keep good use quality after being used for the first time, and has better potential recycling value. Therefore, recycling of waste glass is necessary from both environmental and economic perspectives.
At present, the recycling of waste glass mainly comprises the following two modes: firstly, waste glass is subjected to impurity removal treatment and then is used as a raw material to be put into the production of new glass, so that the sintering cost of the glass can be effectively reduced. Secondly, the waste glass is applied to the building field, for example, the waste glass is mixed into concrete as aggregate or the waste glass without impurities is fired into a novel building material, for example, Chinese patent application discloses a method for manufacturing environment-friendly floor tiles by firing the waste glass of the solar panel, the method grinds the waste glass of the solar panel into powder, then the powder is uniformly mixed with clay, and the floor tiles are prepared by pressure molding and high-temperature sintering; similarly, another Chinese patent application discloses a method for producing a high-strength light building material by foaming waste glass, which comprises the steps of grinding the waste glass, a foaming agent and a foam stabilizer into powder with different particle sizes, mixing the powder uniformly according to a certain proportion, and sintering at the temperature of 700-1000 ℃ to prepare the high-strength light building material. Therefore, the resource utilization of the waste glass is still in a low value-added stage, and the waste glass raw materials used in the method are subjected to pretreatment such as cleaning and impurity removal to remove impurities adhered to the surface of the waste glass, so that the treatment cost is greatly increased.
Therefore, it is urgently needed to provide a method for preparing high value-added materials by directly utilizing waste glass containing impurities.
Disclosure of Invention
The invention aims to solve the technical problems that the existing waste glass needs to be subjected to complex pretreatment for recycling and the obtained product has low added value, and provides a method for preparing high-added-value material ultrathin glass by directly utilizing impurity-containing waste glass.
The invention aims to provide the ultrathin glass prepared by the method.
It is another object of the present invention to provide the use of said ultra-thin glass.
The above purpose of the invention is realized by the following technical scheme:
a method for preparing ultrathin glass by using waste glass containing organic impurities comprises the following steps:
breaking and crushing waste glass containing organic impurities, heating to 800-900 ℃ under a vacuum condition to fully sinter the glass, and simultaneously evaporating water on the surface of the waste glass to pyrolyze and convert the organic impurities into harmless gas for removal; heating to 1100-1200 ℃ to melt the glass; continuously heating to 1400-1500 ℃ to boil and clarify the glass solution; and cooling to 500-600 ℃ for annealing, so that the glass solution is deposited in situ to generate the ultrathin glass.
The method comprises the steps of carrying out vacuum gradient heat treatment on crushed waste glass particles containing organic impurities, and carrying out vacuum pyrolysis reaction on organic impurities on the surfaces of the waste glass under different temperature gradients to form harmless gas to be removed from the surfaces of the waste glass; further raising the temperature, melting and liquefying the waste glass with impurities removed, boiling and clarifying, and depositing in situ step by step to finally generate the ultrathin glass. On one hand, the invention adopts a combined method of gradient vacuum pyrolysis and high-temperature in-situ deposition, can convert organic impurities on the surface of the waste glass into harmless gas, and prepares the waste glass from which the organic impurities are removed into the ultrathin glass, thereby realizing green and efficient removal of the organic impurities on the surface of the waste glass and high added value recycling of the waste glass. On the other hand, the method is simple to operate, can directly prepare the waste glass containing organic impurities into the ultrathin glass with high added value without complex cleaning, impurity removal and other pretreatment, and is very suitable for industrial large-scale production.
Further, the waste glass includes silicate glass, borate glass, and phosphate glass.
Further, the organic impurities include kitchen residue (such as soy sauce, edible oil, etc.), labels, adhesives, etc.
Furthermore, the crushing ensures that the particle size of the waste glass containing organic impurities is less than or equal to 1 mm. Preferably, the crushing makes the particle size of the waste glass containing organic impurities be 0.08-0.8 mm; more preferably, the crushing is carried out so that the particle size of the waste glass containing organic impurities is 0.1-0.5 mm.
Further, the vacuum condition is 1 to 10 Pa. Preferably, the vacuum condition is 1-5 Pa.
Further, the heating rate is 10-20 ℃/min. Preferably, the heating rate is 10-15 ℃/min; more preferably, the temperature rise rate is 10 ℃/min.
Furthermore, the cooling rate is 10-20 ℃/min. Preferably, the cooling rate is 10-15 ℃/min; more preferably, the cooling rate is 10 ℃/min.
Further, after the temperature is increased to 800-900 ℃, 1100-1200 ℃ or 1400-1500 ℃, the temperature is kept for 30-40 min. Preferably, the temperature is kept for 30-35 min; more preferably, the temperature is maintained for 30 min.
Furthermore, the annealing time is 5-6 h. Preferably, the annealing time is 5.5-6 h; more preferably, the annealing time is 6 h.
In addition, the invention also provides the ultrathin glass prepared by the method.
Further, the thickness of the ultrathin glass is 0.1-1.0 mm.
The detection shows that the ultrathin glass prepared by the invention has the advantages of small thickness, smooth surface, good light transmission and excellent dielectric property, completely meets the display requirements of the current electronic products such as mobile phones and flat plates, has potential application prospect in the photovoltaic field due to the good light transmission, has higher added value and has huge economic market.
Therefore, the invention also claims the application of the ultrathin glass in display parts of electronic products and photovoltaic materials.
The invention has the following beneficial effects:
the invention relates to a method for preparing ultrathin glass by using waste glass containing organic impurities, which comprises the steps of carrying out vacuum gradient heat treatment on crushed waste glass particles containing organic impurities, and carrying out vacuum pyrolysis reaction on organic impurities on the surface of the waste glass under different temperature gradients to form harmless gas to be removed from the surface of the waste glass; further raising the temperature, melting and liquefying the waste glass with impurities removed, boiling and clarifying, and depositing in situ step by step to finally generate the ultrathin glass. The method can convert organic impurities on the surface of the waste glass into harmless gas, and can also prepare the waste glass from which the organic impurities are removed into ultrathin glass, so that the green and efficient removal of the organic impurities on the surface of the waste glass and the high-added-value recycling of the waste glass are realized. In addition, the method is simple to operate, can directly prepare the waste glass containing organic impurities into the ultrathin glass with high added value without complex cleaning, impurity removal and other pretreatment, and is very suitable for industrialized large-scale production.
Drawings
FIG. 1 is a surface micro-topography of the ultra-thin glass prepared in example 1 of the present invention.
FIG. 2 is a statistical chart showing the results of measuring the dielectric constant and dielectric loss of the ultra-thin glass prepared in example 1 of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the following detailed description, which are not intended to limit the invention in any way. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Unless otherwise indicated, reagents and materials used in the following examples are commercially available.
Example 1 a method for preparing ultra-thin glass using waste glass containing organic impurities
The method for preparing the ultrathin glass by using the waste glass containing the organic impurities specifically comprises the following steps of:
s1, crushing the soy sauce bottle into granules with the grain size of 0.08mm, putting 10.0g of the granules into a corundum crucible, putting the corundum crucible into a vacuum tube furnace, starting a vacuum pump, controlling the pressure in the tube furnace to be about 1Pa, and keeping the vacuum degree unchanged all the time;
s2, heating the temperature in the furnace to 900 ℃ at a heating rate of 10 ℃/min, keeping the temperature for 30min, sintering the waste glass, pyrolyzing the soy sauce residues on the surface of the waste glass, and collecting gas generated by pyrolyzing the soy sauce residues on the surface of the waste glass by using a gas collection bag;
s3, adopting a heating rate of 10 ℃/min to heat the temperature in the furnace to 1200 ℃, and keeping the temperature for 30min to melt the waste glass;
s4, heating the temperature in the furnace to 1500 ℃ at a heating rate of 10 ℃/min, and keeping for 30min to clarify and boil the waste glass solution;
and S5, reducing the temperature in the furnace to 500 ℃ at a cooling rate of 10 ℃/min, and keeping for 6 hours for annealing treatment to enable the boiling glass liquid to be deposited in situ to generate the ultrathin glass.
The gas collected in step S2 and the ultra-thin glass prepared in step S5 were analyzed:
(1) the gas composition and content of the gas are analyzed by adopting a gas chromatography-mass spectrometer, and the main components of the gas are measured to be carbon dioxide and water vapor which respectively account for 52.99 percent and 33.34 percent, and the gas also comprises a small amount of substances such as nitrogen and the like. The gas generated by the pyrolysis of the soy sauce residue on the surface of the waste glass has no pollutants, and is green and environment-friendly.
(2) As can be seen from the measurement, the thickness of the ultra-thin glass prepared in the step S5 is only 0.26 mm.
(3) And (2) observing the surface micro-morphology of the ultrathin glass prepared in the step S5 by using a scanning electron microscope (see fig. 1 in particular), wherein the surface of the ultrathin glass is smooth and has no cracks or impurities.
(4) The transmittance of the obtained ultrathin glass to visible light and near infrared light is measured, the maximum transmittance to visible light is 84.85%, the transmittance to near infrared light is 86.98%, and the ultrathin glass has better light transmittance.
(5) The impedance analyzer measures the dielectric constant and the dielectric loss of the ultra-thin glass prepared in step S5, and the results are shown in fig. 2. As can be seen from the figure, at the frequency of 1MHz, the dielectric constant of the ultrathin glass is 6.79, which is much lower than that of the ultrathin glass (7.7, 1MHz) of the touch screen of the mobile phone on the market; and the dielectric loss of the prepared ultrathin glass is between 0.0001 and 0.04, which shows that the energy consumed by the heat effect is very small when the ultrathin glass works as a photoelectric material.
The performance analysis shows that the ultrathin glass prepared by the invention has small thickness, smooth surface, good light transmission and excellent dielectric property, completely meets the display requirements of the current electronic products such as mobile phones and flat plates, has potential application prospect in the photovoltaic field due to the good light transmission, has higher added value and has huge economic market.
Example 2 method for preparing ultra-thin glass using waste glass containing organic impurities
The method for preparing the ultrathin glass by using the waste glass containing the organic impurities specifically comprises the following steps of:
s1, crushing the glass bottle containing the label paper into granules with the grain size of 0.8mm, putting 10.0g of the granules into a corundum crucible, putting the corundum crucible into a vacuum tube furnace, starting a vacuum pump, controlling the pressure in the tube furnace to be about 5Pa, and keeping the vacuum degree unchanged all the time;
s2, heating the temperature in the furnace to 800 ℃ at a heating rate of 15 ℃/min, keeping the temperature for 30min, sintering the waste glass, pyrolyzing the label paper residues on the surface of the waste glass, and collecting gas generated by pyrolyzing the label paper residues on the surface of the waste glass by using a gas collection bag;
s3, heating the temperature in the furnace to 1100 ℃ at a heating rate of 15 ℃/min, and keeping for 30min to melt the waste glass;
s4, heating the temperature in the furnace to 1400 ℃ at a heating rate of 15 ℃/min, and keeping for 30min to clarify and boil the waste glass solution;
and S5, reducing the temperature in the furnace to 600 ℃ at a cooling rate of 10 ℃/min, and keeping for 6 hours for annealing treatment to enable the boiling glass liquid to be deposited in situ to generate the ultrathin glass.
The gas collected in step S2 and the ultra-thin glass prepared in step S5 were analyzed:
(1) the gas composition and content of the gas are analyzed by adopting a gas chromatography-mass spectrometer, and the main components of the gas are determined to be carbon dioxide and water vapor which respectively account for 48.99% and 36.34%, and the gas also comprises a small amount of substances such as nitrogen and the like. The gas generated by pyrolysis of the label paper residue on the surface of the waste glass has no pollutants, and is green and environment-friendly.
(2) As can be seen from the measurement, the thickness of the ultra-thin glass prepared in step S5 is only 0.35 mm.
(3) And (4) observing the surface micro-morphology of the ultrathin glass prepared in the step S5 by using a scanning electron microscope, wherein the obtained ultrathin glass has a smooth surface and does not have cracks or impurities.
(4) The transmittance of the obtained ultrathin glass to visible light and near infrared light is measured, the maximum transmittance to visible light is 86.75%, the transmittance to near infrared light is 88.56%, and the ultrathin glass has better light transmittance.
(5) The impedance analyzer measures the dielectric constant and the dielectric loss of the ultrathin glass prepared in the step S5, and when the frequency is 1MHz, the dielectric constant of the ultrathin glass is 6.39 which is far lower than the dielectric constant (7.7, 1MHz) of the ultrathin glass of the touch screen of the mobile phone on the market; and the dielectric loss of the prepared ultrathin glass is between 0.0001 and 0.03, which shows that the energy consumed by the heat effect is very small when the ultrathin glass works as a photoelectric material.
Example 3 method for preparing ultra-thin glass using waste glass containing organic impurities
The method for preparing the ultrathin glass by using the waste glass containing the organic impurities specifically comprises the following steps of:
s1, crushing the glass containing the glue into granules with the grain size of 0.4mm, putting 10.0g of the granules into a corundum crucible, putting the corundum crucible into a vacuum tube furnace, starting a vacuum pump, controlling the pressure in the tube furnace to be about 1Pa, and keeping the vacuum degree unchanged all the time;
s2, heating the temperature in the furnace to 850 ℃ at a heating rate of 20 ℃/min, keeping the temperature for 30min, sintering the waste glass, pyrolyzing the label paper residues on the surface of the waste glass, and collecting gas generated by pyrolyzing the label paper residues on the surface of the waste glass by using a gas collection bag;
s3, heating the temperature in the furnace to 1150 ℃ at a heating rate of 20 ℃/min, and keeping the temperature for 30min to melt the waste glass;
s4, heating the temperature in the furnace to 1450 ℃ at a heating rate of 20 ℃/min, and keeping the temperature for 30min to clarify and boil the waste glass solution;
and S5, reducing the temperature in the furnace to 550 ℃ at a cooling rate of 10 ℃/min, and keeping for 5 hours for annealing treatment to enable the boiling glass liquid to be deposited in situ to generate the ultrathin glass.
The gas collected in step S2 and the ultra-thin glass prepared in step S5 were analyzed:
(1) the composition and content of the gas are analyzed by adopting a gas chromatography-mass spectrometer, and the main compositions of the gas are determined to be carbon dioxide and water vapor which respectively account for 51.34 percent and 32.96 percent and also comprise a small amount of substances such as nitrogen and the like. The gas generated by pyrolysis of the label paper residue on the surface of the waste glass has no pollutants, and is green and environment-friendly.
(2) As can be seen from the measurement, the thickness of the ultra-thin glass prepared in step S5 is only 0.18 mm.
(3) And (4) observing the surface micro-morphology of the ultrathin glass prepared in the step S5 by using a scanning electron microscope, wherein the obtained ultrathin glass has a smooth surface and does not have cracks or impurities.
(4) The transmittance of the obtained ultrathin glass to visible light and near infrared light is measured, the maximum transmittance to visible light is 86.89%, the transmittance to near infrared light is 87.46%, and the ultrathin glass has better light transmittance.
(5) The impedance analyzer measures the dielectric constant and the dielectric loss of the ultrathin glass prepared in the step S5, and when the frequency is 1MHz, the dielectric constant of the ultrathin glass is 6.24 which is far lower than the dielectric constant (7.7 and 1MHz) of the ultrathin glass of the touch screen of the mobile phone on the market; and the dielectric loss of the prepared ultrathin glass is between 0.001 and 0.03, which shows that the energy consumed by the heat effect is very small when the ultrathin glass works as a photoelectric material. Comparative example 1 method for recovering waste glass containing organic impurities
The method for recycling the waste glass containing the organic impurities specifically comprises the following steps:
s1, crushing the soy sauce bottle into granules with the grain size of 0.08mm, putting 10.0g of the granules into a corundum crucible, putting the corundum crucible into a tube furnace, maintaining the pressure in the tube furnace at standard atmospheric pressure, and maintaining the vacuum degree unchanged all the time;
s2, adopting a heating rate of 10 ℃/min to heat the temperature in the furnace to 900 ℃, and keeping the temperature for 30min to sinter the waste glass;
s3, heating the temperature in the furnace to 1200 ℃ at a heating rate of 10 ℃/min, and keeping the temperature for 30min to melt the waste glass;
s4, heating the temperature in the furnace to 1500 ℃ at a heating rate of 10 ℃/min, and keeping for 30min to clarify the waste glass solution;
and S5, reducing the temperature in the furnace to 500 ℃ at a cooling rate of 10 ℃/min, and keeping for 6 hours for annealing treatment to enable the molten glass to generate glass in situ.
Comparative example 1 is different from example 1 in that the reaction process is not under vacuum condition, soy sauce residue on the surface of the waste glass cannot be completely decomposed and gasified to be removed from the surface of the waste glass, and during the normal pressure sintering process, the soy sauce residue generates a large amount of sintering residue, which is in the form of black small particles and exists in the sintered glass; meanwhile, the glass can not be boiled and gasified under the non-vacuum condition and can not be deposited to form ultra-thin glass, the thickness of the prepared glass is 2.5mm, and a large amount of sintering residues are doped, so that the glass has no utilization value.
Comparative example 2 method for recovering waste glass containing organic impurities
The method for recycling the waste glass containing the organic impurities specifically comprises the following steps:
s1, crushing the soy sauce bottle into granules with the grain size of 0.08mm, putting 10.0g of the granules into a corundum crucible, putting the corundum crucible into a vacuum tube furnace, starting a vacuum pump, controlling the pressure in the tube furnace to be about 1Pa, and keeping the vacuum degree unchanged all the time;
s2, heating the temperature in the furnace to 900 ℃ at a heating rate of 10 ℃/min, keeping the temperature for 30min, sintering the waste glass, pyrolyzing the soy sauce residues on the surface of the waste glass, and collecting gas generated by pyrolyzing the soy sauce residues on the surface of the waste glass by using a gas collection bag;
s3, heating the temperature in the furnace to 1200 ℃ at a heating rate of 10 ℃/min, and keeping the temperature for 30min to melt the waste glass;
s4, raising the temperature in the furnace to 1250 ℃ at a temperature raising rate of 10 ℃/min, and keeping for 30 min;
s5, reducing the temperature in the furnace to 500 ℃ at a cooling rate of 10 ℃/min, and keeping for 6h for annealing treatment.
The glass obtained after the collection and sintering is loose and porous foam glass, can be recycled as building materials, does not have special photoelectric properties and has no higher recycling value.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A method for preparing ultrathin glass by using waste glass containing organic impurities is characterized by comprising the following steps:
breaking and crushing waste glass containing organic impurities, and heating to 800-900 ℃ under a vacuum condition to be completely sintered; heating to 1100-1200 ℃ to melt the glass; continuously heating to 1400-1500 ℃ to boil the glass solution; and cooling to 500-600 ℃ for annealing, so that the glass solution is deposited in situ, and the ultrathin glass is generated.
2. The method for preparing ultra-thin glass using waste glass containing organic impurities as claimed in claim 1, wherein the waste glass comprises silicate glass, borate glass, phosphate glass.
3. The method for preparing ultra-thin glass from waste glass containing organic impurities as claimed in claim 1, wherein the crushing is performed so that the particle size of the waste glass containing organic impurities is less than or equal to 1 mm.
4. The method for preparing ultra-thin glass from waste glass containing organic impurities as claimed in claim 1, wherein the vacuum condition is 1-10 Pa.
5. The method for preparing ultra-thin glass from waste glass containing organic impurities as claimed in claim 1, wherein the temperature raising rate is 10 to 20 ℃/min.
6. The method for preparing ultrathin glass by using the waste glass containing the organic impurities as claimed in claim 1, wherein the cooling rate is 10-20 ℃/min.
7. The method for preparing ultra-thin glass from waste glass containing organic impurities as claimed in claim 1, wherein the temperature is maintained for 30-40 min after the temperature is raised to 800-900 ℃, 1100-1200 ℃ or 1400-1500 ℃.
8. An ultra-thin glass produced by the method of any one of claims 1 to 7.
9. The ultra-thin glass of claim 8, wherein the ultra-thin glass has a thickness of 0.1 mm to 1.0 mm.
10. Use of the ultra-thin glass of claim 8 or 9 in electronic display components, photovoltaic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210655672.0A CN115043575B (en) | 2022-06-10 | 2022-06-10 | Method for preparing ultrathin glass by utilizing waste glass containing organic impurities |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104418A (en) * | 1975-09-23 | 1978-08-01 | International Business Machines Corporation | Glass layer fabrication |
| US4256794A (en) * | 1978-01-07 | 1981-03-17 | Messrs. Leonhard Kurz | Blocking foil |
| WO1998014406A1 (en) * | 1996-09-30 | 1998-04-09 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Glass making characterized by distillation |
| JP2001350137A (en) * | 2000-06-09 | 2001-12-21 | Densho Engineering:Kk | Method for recovering glass from lcd |
| JP2002023126A (en) * | 2000-07-04 | 2002-01-23 | Mitsubishi Materials Corp | Processing method and processing device of waste liquid crystal panel |
| JP2005292394A (en) * | 2004-03-31 | 2005-10-20 | Nokodai Tlo Kk | Recovery method of liquid crystal panel glass from waste liquid crystal panel |
| WO2007031225A2 (en) * | 2005-09-15 | 2007-03-22 | Schott Ag | Method for producing evaporation glass layers and products produced according to said method |
| CN102432914A (en) * | 2011-10-25 | 2012-05-02 | 唐瑞文 | Method and equipment for decomposing and recovering glass fiber reinforced plastics |
-
2022
- 2022-06-10 CN CN202210655672.0A patent/CN115043575B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104418A (en) * | 1975-09-23 | 1978-08-01 | International Business Machines Corporation | Glass layer fabrication |
| US4256794A (en) * | 1978-01-07 | 1981-03-17 | Messrs. Leonhard Kurz | Blocking foil |
| WO1998014406A1 (en) * | 1996-09-30 | 1998-04-09 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Glass making characterized by distillation |
| JP2001350137A (en) * | 2000-06-09 | 2001-12-21 | Densho Engineering:Kk | Method for recovering glass from lcd |
| JP2002023126A (en) * | 2000-07-04 | 2002-01-23 | Mitsubishi Materials Corp | Processing method and processing device of waste liquid crystal panel |
| JP2005292394A (en) * | 2004-03-31 | 2005-10-20 | Nokodai Tlo Kk | Recovery method of liquid crystal panel glass from waste liquid crystal panel |
| WO2007031225A2 (en) * | 2005-09-15 | 2007-03-22 | Schott Ag | Method for producing evaporation glass layers and products produced according to said method |
| CN102432914A (en) * | 2011-10-25 | 2012-05-02 | 唐瑞文 | Method and equipment for decomposing and recovering glass fiber reinforced plastics |
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| CN115043575B (en) | 2023-10-31 |
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