CN111548008A - Preparation method of ADF glass and ADF glass prepared by adopting same - Google Patents
Preparation method of ADF glass and ADF glass prepared by adopting same Download PDFInfo
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- CN111548008A CN111548008A CN202010446900.4A CN202010446900A CN111548008A CN 111548008 A CN111548008 A CN 111548008A CN 202010446900 A CN202010446900 A CN 202010446900A CN 111548008 A CN111548008 A CN 111548008A
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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
- C03C1/004—Refining agents
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
-
- 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
Abstract
The invention discloses a preparation method of ADF glass and ADF glass prepared by the method, belonging to the technical field of glass; the preparation method of the ADF glass comprises the following steps: soaking the quartz sand in the soaking solution, and soaking and washing the quartz sand by using water after the soaking of the soaking solution is finished; drying the fluxing agent, the clarifying agent and the quartz sand after soaking; heating to enable the dried fluxing agent, the clarifying agent and the quartz sand to be in a molten state, and obtaining glass liquid; continuing to heat the glass liquid until the temperature reaches 1300-1500 ℃, and preserving heat and standing; cooling the glass liquid after the clarification treatment to 700-900 ℃, and standing; and (3) cooling and forming: transferring the homogenized molten glass into a mold, and cooling and molding; the method can reduce the content of impurity iron in the ADF glass; the ADF glass prepared by the method has the advantages of good light transmittance, thermal stability and compressive strength.
Description
Technical Field
The invention relates to the technical field of glass, in particular to a preparation method of ADF glass and the ADF glass prepared by the method.
Background
The multifunctional printer is also called as multifunctional integrated machine, and is one printer with several functions of printing, copying, facsimile, scanning, etc. and may be used in different fields.
The multifunctional printer consists of a scanning device, a printer and a computer. Under the condition of not using a computer, the scanner is directly connected with the color printer to form a color copier, and after an ADF automatic paper feeder is added, a plurality of pages of paper can be automatically and continuously copied; and when the scanning device is connected with a computer, the scanning device can be used as a standard scanner. The scanning device is located below the ADF automatic paper feeder, and a piece of scanning glass is arranged on the scanning device, wherein the piece of scanning glass can be called as ADF glass. The ADF glass has requirements on thickness, light transmittance, uniformity of the surface, presence of bubbles in the glass, abrasion resistance, high temperature resistance, and the like of the glass, or the ADF glass affects printing quality.
The prior Chinese patent with the publication number of CN104402219B discloses a preparation method of phosphate optical glass and the phosphate optical glass obtained by the method, wherein the preparation method comprises the following steps: a. providing a component A, wherein the component A comprises the following components in percentage by oxide: P2O 5: 40-55%, BaO: 30-45%, CaO: 8-18%, MgO: 0 to 10 percent; wherein, the component A does not contain B2O 3; b. providing a component B, wherein the component B comprises the following components in percentage by oxide: B2O 3: 60-85%, Al2O 3: 15-30%, ZrO 2: 0 to 10 percent; the percentages are weight percentages; c. preparing the component A into clinker C; d. mixing the clinker C and the B to prepare a batch D; e. and smelting the batch D into phosphate optical glass.
The phosphate optical glass in the prior art has better transmittance, but the phosphate optical glass in the prior art has poor compressive strength, and if the phosphate optical glass is used as ADF glass on a printer, the phosphate optical glass needs to be replaced frequently.
In order to solve the problem of poor compressive strength of the ADF glass, most people adopt silicate glass which has good compressive strength and can be used as the ADF glass so as to prolong the service life of the ADF glass.
Wherein, the light transmittance of the prior silicate glass is about 80 percent, the softening temperature is about 550 ℃, and the compressive strength is about 270 MPa. However, since the silicate glass contains SiO2 as a main component and SiO2 is generally introduced using silica sand, the silica sand generally contains many impurities of iron-based oxides, and when the glass contains many iron impurities, the color of the glass varies, which affects the light transmittance of the glass. Therefore, it is desirable to provide a method for producing an ADF glass that can provide an ADF glass having less iron-containing impurities and good light transmittance.
Disclosure of Invention
The first object of the present invention is to provide a method for preparing ADF glass, which reduces the residual of iron element in ADF glass by performing pretreatment of acid leaching on quartz sand as a main raw material, and is beneficial to improving the light transmittance of the glass.
The second purpose of the invention is to provide the ADF glass prepared by the preparation method of the ADF glass, which has the advantages of good light transmittance, good thermal stability and high compressive strength.
In order to achieve the first object, the invention provides the following technical scheme:
a method for preparing ADF glass comprises the following steps:
step (1), pretreatment: soaking the quartz sand in the soaking solution, soaking and washing the quartz sand by using water after the soaking of the soaking solution is finished until the water for soaking and washing the quartz sand is neutral, and fishing out the quartz sand;
step (2), drying: drying the fluxing agent, the clarifying agent and the quartz sand after the step (1) is finished;
and (3) melting: heating to ensure that the dried fluxing agent, the clarifying agent and the quartz sand are in a molten state, wherein the melting temperature is 850-950 ℃, and then uniformly stirring to obtain glass liquid;
and (4) clarifying: continuing to heat the glass liquid until the temperature reaches 1300-1500 ℃, preserving heat and standing to eliminate bubbles;
step (5), homogenizing: cooling the glass liquid after the clarification treatment to 700-900 ℃, and standing to ensure that the glass liquid tends to be uniformly distributed;
and (6) cooling and forming: transferring the homogenized molten glass into a mold, and cooling and molding to obtain ADF glass;
wherein the soaking solution is an acidic solution.
By adopting the technical scheme, the quartz sand is pre-soaked by the acid solution, so that impurities in the quartz sand, such as ferrite, can be dissolved in the acid solution, wherein the acid solution can be any one or a mixture of hydrochloric acid, sulfuric acid, nitric acid or organic acid, and SiO2 cannot be dissolved in the acid solution or the acid solution of the combination of acids, so that the loss of SiO2 cannot be caused; in addition, after part of iron oxide compounds included in SiO2 are removed, some micropores can be generated in the quartz sand, which is beneficial to accelerating the melting speed of the quartz sand;
after the acid leaching of the quartz sand is finished, most of ferrite compounds are removed, the quartz sand after the acid leaching is washed, so that iron ions remained on the surface of the quartz sand can be further removed, and meanwhile, an acid solution on the surface of the quartz sand is washed away, so that the acid solution remained on the surface of the quartz sand is prevented from influencing the quality of the ADF glass;
the ADF glass is added with a fluxing agent and a clarifying agent besides quartz sand, wherein, under the action of the fluxing agent, raw materials for preparing the ADF can be melted at 850-950 ℃, so that the melting point of the quartz sand is reduced, and the fluxing action is realized;
the clarifying agent is a raw material which can be decomposed at high temperature to generate gas or reduce the viscosity of glass liquid in the melting process of the glass so as to promote the elimination of bubbles in the glass liquid and be beneficial to improving the compressive strength of the ADF glass;
after the glass liquid is clarified, cooling the glass liquid to 700-900 ℃, which is beneficial to ensuring that the glass liquid tends to be uniformly distributed; after the glass liquid is homogenized, transferring the homogenized glass liquid into a mold, and cooling and molding to obtain the ADF glass;
the method for manufacturing the ADF glass carries out the pretreatment of acid leaching on the quartz sand which is the main raw material, thereby reducing the residue of iron element in the ADF glass and being beneficial to improving the light transmittance of the ADF glass.
Further: the soaking solution comprises the following raw materials in parts by weight:
sulfamic acid: 10-20 parts;
nitric acid: 10-20 parts;
water: 500 parts.
By adopting the technical scheme, the volatility of the sulfamic acid and the nitric acid is low, the solubility of the ferric sulfamate and the ferric nitrate is high, and the ferric oxide compounds in the quartz sand can be dissolved by singly adopting the sulfamic acid or singly adopting the nitric acid; however, when the mixed acid solution of sulfamic acid and nitric acid is used to soak the quartz sand, the leaching efficiency of iron oxide compounds in the quartz sand can be improved.
Further: the soaking solution comprises the following raw materials in parts by weight:
sulfamic acid: 10-20 parts;
nitric acid: 10-20 parts;
sodium lauryl sulfate: 5-7 parts;
water: 500 parts.
By adopting the technical scheme, the lauryl sodium sulfate is added into the soaking solution, is a hydrophilic surfactant and is resistant to strong acid, and can still play a role in self permeation in a strong acid environment, so that the soaking solution can be favorably soaked into quartz sand, the removal rate of iron oxide compounds in the quartz sand is improved, and the light transmittance of the ADF glass is further enhanced.
Further: the average grain size range of the quartz sand is 40 meshes.
By adopting the technical scheme, the average particle size range of the quartz sand is controlled to be 40 meshes, and at the moment, the soaking solution is better in iron removal effect after soaking the sepiolite sand; when the average particle size range of the quartz sand is larger than 40 meshes, the soaking solution cannot permeate into the quartz sand in a short time, so that the iron removal effect of the soaking solution on the quartz sand is general; when the average particle size range of the quartz sand is less than 40 meshes, the loss rate of SiO2 in the quartz sand is increased after the quartz sand is soaked, so that the compressive strength of the ADF glass is influenced.
Further: the weight portion of the quartz sand is 295-305 portions, and the weight portion of the fluxing agent is 15-25 portions; the weight portion of the clarifying agent is 10-20 portions.
By adopting the technical scheme, when the quartz sand, the fluxing agent and the clarifying agent are mixed according to the proportion, the ADF glass has the advantages of good light transmittance, good thermal stability and high compressive strength.
Further: the fluxing agent is prepared from limestone, sodium carbonate and borax in a weight ratio of (1-2): (1-2): (1-3).
By adopting the technical scheme, the melting point of quartz sand is generally about 1750 ℃, the melting point of limestone is generally about 825 ℃, the melting point of sodium carbonate is generally about 851 ℃, the melting point of borax is generally about 880 ℃, the melting point of fluorite is generally about 1350 ℃, the melting point of antimony oxide is generally about 656 ℃, the melting point of sodium nitrate is generally about 308 ℃, and under the synergistic action of limestone, sodium carbonate and borax, all raw materials for manufacturing ADF glass can be dissolved within the temperature range of 850-; and under the synergistic action of limestone, sodium carbonate and borax, the thermal stability of the ADF glass is favorably improved.
Further: the fluxing agent is prepared from limestone, sodium carbonate and borax in a weight ratio of 2:2: 1.
By adopting the technical scheme, when the weight ratio of limestone, sodium carbonate and borax is 2: at 2:1, the softening temperature of the ADF glass is highest, and the thermal stability of the ADF glass is best.
Further: the clarifying agent is prepared from fluorite, antimony oxide and nitrate in a weight ratio of (1-2): (1-2): (1-3).
By adopting the technical scheme, the antimony oxide is usually combined with the nitrate to be used as a clarifying agent, when the melting temperature of the glass is not high, the antimony oxide can react with oxygen released by decomposition of the nitrate to generate antimony pentoxide, and when the melting temperature of the glass, namely the clarifying temperature is higher than 1200 ℃, the antimony pentoxide is decomposed to release oxygen, and the oxygen can accelerate the aggregation and the rising of bubbles in the molten glass, so that the purpose of defoaming the molten glass is achieved; fluorite is a fluoride, part of fluorine can generate sodium fluoride in the glass melting process of the fluoride, and the gasification and volatilization of the sodium fluoride at high temperature can promote the clarification of glass liquid; under the synergistic action of fluorite, antimony oxide and nitrate, the defoaming effect of the ADF glass is improved, so that the compressive strength of the ADF glass is improved.
Further: the clarifying agent is prepared from fluorite, antimony oxide and nitrate according to the weight ratio of 1:1:3, and (3).
By adopting the technical scheme, when the weight ratio of fluorite, antimony oxide and nitrate is 1:1: when 3, the ADF glass has the highest compressive strength.
The second invention of the invention aims to provide the ADF glass which is prepared based on any one of the preparation methods of the ADF glass.
By adopting the technical scheme, the ADF glass prepared by the method has the advantages of less iron-containing impurities, good light transmittance, good thermal stability and high compressive strength.
In conclusion, the invention has the following beneficial effects:
firstly, the soaking solution is adopted to pretreat the quartz sand which is the main raw material for preparing the ADF glass, so that the impurity iron oxide in the quartz sand can be removed, and the light transmittance of the ADF glass is improved.
Secondly, the limestone, the sodium carbonate and the borax have a synergistic effect, so that the heat stability of the ADF glass is improved.
Thirdly, the fluorite, the antimony oxide and the nitrate in the invention have synergistic effect, which is beneficial to improving the defoaming effect of the ADF glass, thereby improving the compressive strength of the ADF glass.
Detailed Description
Sources of raw materials sources of the raw materials used in the present invention are as follows:
table 1 raw material source table
Examples
The amounts of the raw materials added to the ADF glasses of examples 1-14 are shown in Table 2 below:
TABLE 2 ADF glass for examples 1 to 14, the amount of raw material added (unit: kg)
Example 1:
a method for preparing ADF glass comprises the following steps:
step (1), pretreatment: crushing quartz sand with 6-8 meshes, selecting the quartz sand with the average particle size of 40 meshes, soaking the quartz sand with the average particle size of 40 meshes in a soaking solution, soaking and washing the quartz sand by using water after the quartz sand is soaked in the soaking solution, until the water for soaking and washing the quartz sand is neutral, and fishing out the quartz sand;
step (2), drying: drying limestone, sodium carbonate and borax in a weight ratio of 2:2:1, fluorite, antimony oxide and sodium nitrate in a weight ratio of 1:1:3 and the quartz sand pretreated in the step (1);
and (3) melting: putting the dried limestone, sodium carbonate, borax, fluorite, antimony oxide, sodium nitrate and quartz sand into a smelting furnace, heating the smelting furnace to 850 ℃, and stirring uniformly to obtain glass liquid after all the raw materials are melted;
and (4) clarifying: heating the glass liquid to 1300 ℃, preserving the heat and standing the glass liquid to eliminate bubbles in the glass liquid;
step (5), homogenizing, cooling the clarified molten glass to 900 ℃, and standing to enable the molten glass to tend to be uniformly distributed;
and (6) cooling and forming: and transferring the homogenized molten glass into a mold, and cooling and molding to obtain the ADF glass.
Wherein, the preparation of the soak solution in the step (1) is as follows: 10kg of sulfamic acid is dissolved in 500kg of water, and then 20kg of nitric acid is added and stirred uniformly to obtain a soak solution.
Example 2:
a method for producing an ADF glass, which differs from example 1 in that: the addition amount of each raw material of the ADF glass is different; adding 20kg of sulfamic acid and 10kg of nitric acid into the soaking solution in the step (1); heating the smelting furnace in the step (3) to 950 ℃; fourthly, the temperature of the glass liquid in the step (4) is 1500 ℃; fifthly, the temperature of the molten glass in the step (5) is 700 ℃.
Example 3:
a method of making ADF glass, example 1 differing by: the addition amount of each raw material of the ADF glass is different; adding 15kg of sulfamic acid and 15kg of nitric acid into the soaking solution in the step (1); heating the smelting furnace in the step (3) to 900 ℃; fourthly, the temperature of the glass liquid in the step (4) is 1400 ℃; fifthly, the temperature of the molten glass in the step (5) is 800 ℃.
Example 4:
a method for producing an ADF glass, which differs from example 3 in that: 6kg of sodium dodecyl sulfate is added into the soaking solution in the step (1), wherein the soaking solution is prepared as follows: 10kg of sulfamic acid and 5kg of sodium dodecyl sulfate were dissolved in 500kg of water, and then 20kg of nitric acid was added thereto and stirred uniformly to obtain a soaking solution.
Example 5:
a method for producing an ADF glass, which differs from example 4 in that: the addition amount of the sodium dodecyl sulfate in the soaking solution in the step (1) is 5 kg.
Example 6:
a method for producing an ADF glass, which differs from example 4 in that: the addition amount of the sodium dodecyl sulfate in the soaking solution in the step (1) is 7 kg.
Example 7:
a method for producing an ADF glass, which differs from example 4 in that: the weight ratio of limestone, sodium carbonate and borax in the fluxing agent is 1:1: 3.
Example 8:
a method for producing an ADF glass, which differs from example 4 in that: the weight ratio of limestone, sodium carbonate and borax in the fluxing agent is 1.5:1.5: 2.
Example 9:
a method for producing an ADF glass, which differs from example 4 in that: the weight ratio of limestone, sodium carbonate and borax in the fluxing agent is 2:2: 1.
Example 10:
a method for producing an ADF glass, which differs from example 4 in that: the weight ratio of limestone, sodium carbonate and borax in the fluxing agent is 1.5:1.5: 2.
Example 11:
a method for producing an ADF glass, which differs from example 4 in that: the average particle size of the selected quartz sand was 15 mesh.
Example 12:
a method for producing an ADF glass, which differs from example 4 in that: the average particle size of the selected quartz sand was 80 mesh.
Example 13:
a method for producing an ADF glass, which differs from example 4 in that: the soaking solution in the step (1) only comprises 30kg of sulfamic acid, 6kg of sodium dodecyl sulfate and 500kg of water.
Example 14:
a method for producing an ADF glass, which differs from example 4 in that: the soaking solution in the step (1) only comprises 30kg of nitric acid, 6kg of sodium dodecyl sulfate and 500kg of water.
Comparative example
Comparative example 1:
the difference from example 4 is that: step (1) is omitted.
Comparative example 2:
the difference from example 4 is that: the total adding amount of the fluxing agent is unchanged, but the fluxing agent consists of 10kg of limestone and 10kg of sodium carbonate; ② the melting temperature of each raw material in the step (3) is 1000 ℃.
Comparative example 3:
the difference from example 4 is that: the total addition amount of the fluxing agent is unchanged, but the fluxing agent consists of 10kg of sodium carbonate and 10kg of borax; ② the melting temperature of each raw material in the step (3) is 1000 ℃.
Comparative example 4:
the difference from example 4 is that: the total addition amount of the fluxing agent is unchanged, but the fluxing agent consists of 10kg of limestone and 10kg of borax; ② the melting temperature of each raw material in the step (3) is 1000 ℃.
Comparative example 5:
the difference from example 4 is that: the total addition amount of the fluxing agent is not changed, but the fluxing agent is only 20kg of limestone; ② the melting temperature of each raw material in the step (3) is 1100 ℃.
Comparative example 6:
the difference from example 4 is that: the total adding amount of the fluxing agent is not changed, but the fluxing agent is only 20kg of sodium carbonate; ② the melting temperature of each raw material in the step (3) is 1100 ℃.
Comparative example 7:
the difference from example 4 is that: the total addition amount of the fluxing agent is not changed, but the fluxing agent is only 20kg of borax; ② the melting temperature of each raw material in the step (3) is 1100 ℃.
Comparative example 8:
the difference from example 4 is that: the total amount of added fining agent was constant, however, fining agent consisted of 7.50kg antimony oxide and 7.5kg sodium nitrate.
Comparative example 9:
the difference from example 4 is that: the total amount of added fining agent was constant, however, the fining agent consisted of 7.50kg fluorite and 7.5kg sodium nitrate.
Comparative example 10:
the difference from example 4 is that: the total amount of added fining agent was unchanged, however, the fining agent was only 15kg fluorite.
Data detection and analysis
(1) Light transmittance: the glass samples obtained in examples 1 to 14 and comparative examples 1 to 10 were subjected to light transmittance detection in accordance with GB/T5433-;
(2) softening temperature: the softening temperatures of the glass samples obtained in examples 1 to 14 and comparative examples 1 to 10 were measured according to GB/T28195-;
(3) compressive strength: the glass samples obtained in examples 1 to 14 and comparative examples 1 to 10 were tested for compressive strength using a universal press, wherein the compressive strength was calculated as follows:
P＝F/S
in the formula:
p-compressive strength (MPa);
f-pressure at which the glass breaks (N);
s-area of cross section of glass (m)2)。
Wherein the number of tests of the same glass sample was not less than 3 times, and the average value of the compressive strength obtained by the multiple tests of the same glass sample was recorded in the following table 3.
TABLE 3 data test results
From the data in examples 1-14 in Table 3 above, it can be seen that: the method of the invention is adopted to prepare the ADF glass, when the weight part of the quartz sand is 295 plus 305 parts, the weight part of the fluxing agent is 15 to 25 parts; the clarifier is 10-20 weight portions, the light transmittance of the obtained ADF glass is 88-89%, the softening temperature is 610-640 ℃, and the compressive strength is 330-340MPa, while the light transmittance of the prior silicate glass is only about 80%, the softening temperature is about 550 ℃, and the compressive strength is 270MPa, so that the ADF glass prepared by the invention has better performance in light transmittance, thermal stability and compressive strength than the prior art.
From the comparison of the data in example 3 and examples 4-6 in Table 3 above, it can be seen that: under the same conditions, when sodium dodecyl sulfate was added to the soaking solution in examples 4 to 6, the transmittance of the ADF glass obtained in examples 4 to 6 was higher than that of example 3 in which sodium dodecyl sulfate was not added to the soaking solution, which indicates that the addition of sodium dodecyl sulfate is advantageous for immersing the soaking solution into the quartz sand, thereby increasing the removal rate of iron oxide compounds in the quartz sand and further enhancing the transmittance of the ADF glass.
From the comparison of the data in example 4 and examples 5-6 in Table 3 above, it can be seen that: under the same conditions, 5kg, 6kg, and 7kg of sodium dodecyl sulfate were added to the soaking solution, respectively, and when the amount of sodium dodecyl sulfate added was 6kg, the light transmittance of the ADF glass increased relative to the amount of sodium dodecyl sulfate added at 5kg, and the light transmittance of the ADF glass was the same as that of the ADF glass when the amount of sodium dodecyl sulfate added was 7kg, and the amount of sodium dodecyl sulfate added was controlled at 6kg to reduce the production cost.
From the comparison of the data in example 4 and examples 7-8 in Table 3 above, it can be seen that: under the condition that other conditions are not changed, the weight ratio of limestone, sodium carbonate and borax in the fluxing agent is changed, and when the weight ratio of limestone, sodium carbonate and borax is 2:2: when 1 is used, the softening temperature of the ADF glass obtained is the highest, i.e., the ADF glass has the best thermal stability.
As can be seen from the comparison of the data in example 4 and examples 9-10 in Table 3 above: under the condition that other conditions are not changed, the weight ratio of fluorite, antimony oxide and nitrate in the clarifying agent is changed, and when the weight ratio of fluorite, antimony oxide and nitrate is 1:1: when 3, the compressive strength of the obtained ADF glass is the highest.
From the comparison of the data in example 4 and examples 11-12 in Table 3 above, it can be seen that: the method is characterized in that the quartz sand with different average particle size ranges is adopted to prepare the ADF glass, and when the average particle size range of the ADF glass is larger than 40 meshes, a soaking solution cannot permeate into the quartz sand in a short time, so that the iron removal effect of the soaking solution on the quartz sand is general, and the light transmittance of the ADF glass is reduced; when the average particle size of the silica sand is less than 40 mesh, the loss rate of SiO2 in the silica sand increases after the silica sand is soaked, thereby decreasing the compressive strength of the ADF glass.
From the comparison of the data in example 4 and examples 13-14 in Table 3 above, it can be seen that: other conditions are unchanged, when sulfamic acid or nitric acid is singly adopted to soak quartz sand, the iron removal effect of the quartz sand is poor compared with the iron removal effect of soaking by adopting the mixed liquid of amino acid and nitric acid, which shows that sulfamic acid and nitric acid have synergistic effect, and are favorable for improving the leaching effect of iron in the quartz sand, thereby improving the light transmittance of the ADF glass.
From the comparison of the data in example 4 and comparative example 1 in table 3 above, it can be seen that: when the quartz sand is not soaked by the soaking solution under the other conditions, the light transmittance of the obtained ADF glass is reduced.
As can be seen from the comparison of the data in example 4 and comparative examples 2-7 in Table 3 above: under otherwise constant conditions, sheet
When any one or two of limestone, sodium carbonate and borax is/are used as the fluxing agent, the softening temperature of the ADF glass is lower than that of the ADF glass when the three substances are used as the fluxing agents at the same time, which shows that the limestone, the sodium carbonate and the borax have synergistic effect.
As can be seen from the comparison of the data in example 4 and comparative examples 8-10 in Table 3 above: under the condition that other conditions are not changed, when any one or two of fluorite, antimony oxide and nitrate is/are independently adopted as the clarifying agent, the softening temperature of the ADF glass is lower than that of the ADF glass when three substances are simultaneously adopted as the clarifying agent, and the fluorite, the antimony oxide and the nitrate have synergistic action.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A method for preparing ADF glass is characterized in that: the method comprises the following steps:
step (1), pretreatment: soaking quartz sand in the soaking solution, and soaking in water after soaking in the soaking solution
Washing the quartz sand until the water used for soaking and washing the quartz sand is neutral, and fishing out the quartz sand;
step (2), drying: drying the fluxing agent, the clarifying agent and the quartz sand after the step (1) is finished;
and (3) melting: heating to ensure that the dried fluxing agent, the clarifying agent and the quartz sand are in a molten state, wherein the melting temperature is 850-950 ℃, and then uniformly stirring to obtain glass liquid;
and (4) clarifying: continuing to heat the glass liquid until the temperature reaches 1300-1500 ℃, preserving heat and standing to eliminate bubbles;
step (5), homogenizing: cooling the glass liquid after the clarification treatment to 700-900 ℃, and standing to ensure that the glass liquid tends to be uniformly distributed;
and (6) cooling and forming: transferring the homogenized molten glass into a mold, and cooling and molding to obtain ADF glass;
wherein the soaking solution is an acidic solution.
2. The method of claim 1, wherein said ADF glass is prepared by: the soaking solution comprises the following raw materials in parts by weight:
sulfamic acid: 10-20 parts;
nitric acid: 10-20 parts;
water: 500 parts.
3. The method of claim 1, wherein said ADF glass is prepared by: the soaking solution comprises the following raw materials in parts by weight:
sulfamic acid: 10-20 parts;
nitric acid: 10-20 parts;
sodium lauryl sulfate: 5-7 parts;
water: 500 parts.
4. The method of claim 1, wherein said ADF glass is prepared by: the average grain size range of the quartz sand is 40 meshes.
5. The method of claim 1, wherein said ADF glass is prepared by: the weight portion of the quartz sand is 295-305 portions, and the weight portion of the fluxing agent is 15-25 portions; the weight portion of the clarifying agent is 10-20 portions.
6. The method of claim 1, wherein said ADF glass is prepared by: the fluxing agent is prepared from limestone, sodium carbonate and borax in a weight ratio of (1-2): (1-2): (1-3).
7. The method of claim 6, wherein said ADF glass is prepared by: the fluxing agent is prepared from limestone, sodium carbonate and borax in a weight ratio of 2:2: 1.
8. The method of claim 1, wherein said ADF glass is prepared by: the clarifying agent is prepared from fluorite, antimony oxide and nitrate in a weight ratio of (1-2): (1-2): (1-3).
9. The method of claim 8, wherein said ADF glass is prepared by: the clarifying agent is prepared from fluorite, antimony oxide and nitrate according to the weight ratio of 1:1:3, and (3).
10. An ADF glass, comprising: an ADF glass prepared by the process of any one of claims 1 to 9.
Priority Applications (1)
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Application publication date: 20200818 |