Alkali-free glass substrate, and method and apparatus for manufacturing the same

Abstract

The application discloses an alkali-free glass substrate, characterized by comprising the following components in terms of mol percentage: 60-72% of SiO2, 8-20% of Al2O3, 6-14% of B2O3, 3-6% of MgO, 3-5% of CaO, 3-5% of SrO, 0-2% of BaO and 0.1-1% of a composite clarifying agent; wherein the sum of the mol percentages of MgO, CaO, SrO and BaO in the alkali-free glass substrate is 9-17%. The application provides an alkali-free glass substrate, a preparation method and a preparation device thereof, reduces the use of clarifying agents, has good clarifying effect, adopts a mixture tabletting process, avoids the problems of stratification and agglomeration of the mixture, and can reduce the energy consumption in a melting process.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of glass substrates, in particular relates to an alkali-free glass substrate and a preparation method and preparation equipment thereof. BACKGROUND

[0002] Alkali-free aluminum borosilicate system glass has excellent physical and chemical properties, which is superior to ordinary sodium calcium silicon system glass in mechanical strength, dielectric properties, hardness, heat resistance and acid and alkali resistance.

[0003] The biggest feature of the alkali-free glass substrate in composition is that the content of alkali metal oxides (Na2O, K2O, Li2O) in the raw materials is extremely low, and theoretically the content of alkali metal oxides should be zero.

[0004] Due to the extremely low content of alkali metal oxides or the absence of alkali metal oxides in the alkali-free glass substrate, the high-temperature viscosity of the glass is significantly increased by SiO2, Al2O3 and other refractory components, thereby making it difficult to clarify the glass liquid.

[0005] During the manufacturing process of the alkali-free glass substrate, the raw materials need to be crushed into different specifications of powder particles, and then the raw materials are mixed into a mixture which is then put into a kiln for use. Due to the different particle sizes of the raw materials in the mixture, long-term placement may cause stratification, thereby affecting the melting effect of the glass substrate, and in severe cases, it may also cause the generation of glass defects. In addition, when the mixture is put into the kiln, the powder particles are small in size and the powder is easy to agglomerate, which may also cause the generation of melting lag, affecting the melting effect and leading to glass defects. SUMMARY

[0006] The purpose of the present application is to overcome the above problems existing in the prior art, provide an alkali-free glass substrate and a preparation method and preparation equipment thereof, reduce the use of clarifying agents, have good clarifying effect, adopt mixture tabletting treatment to avoid the problems of stratification and agglomeration of the mixture, and reduce the energy consumption in the melting process.

[0007] In order to achieve the above technical purposes and achieve the above technical effects, the present application is realized by the following technical scheme:

[0008] In a first aspect, the present application provides an alkali-free glass substrate, which is composed of the following components in terms of mole percentage: 60-72% of SiO2, 8-20% of Al2O3, 6-14% of B2O3, 3-6% of MgO, 3-5% of CaO, 3-5% of SrO, 0-2% of BaO, and 0.1-1% of a composite clarifying agent.

[0009] In the alkali-free glass substrate, the sum of the mole percentages of MgO, CaO, SrO and BaO is 9-17%;

[0010] The composite clarifier consists of 25-40% CeO2, 20-40% La2O3, 20-35% SnO2 and 2-8% NaCl in terms of molar percentage.

[0011] Further, the preparation of the composite clarifier comprises the following steps:

[0012] Step a: Preparation of CeO2 micro powder

[0013] After weighing CeO2 and ball milling for 10-12h using a ball mill, raw material powder is obtained. Anhydrous ethanol is added in a raw material powder to volume ratio of 1:10, and mixed and stirred for 1-2h. During the mixing and stirring process, ammonia water is added dropwise to control the final pH value to 8.5-9.5. After stirring, it is filtered after standing for 4-6h, washed with distilled water, and washed with anhydrous ethanol for 3-5 times to obtain a crude filter product. The crude filter product is placed in an oven for drying, with a drying temperature of 100-120℃ and a drying time of 2-4h to obtain a dried product. The dried product is calcined under nitrogen atmosphere for 1-2h, with a calcination temperature of 450-550℃. After calcination and cooling, a calcined product is obtained. The calcined product is ground and sieved through a 50-70 mesh sieve to prepare CeO2 micro powder;

[0014] Step b: Preparation of La2O3 micro powder

[0015] La2O3 micro powder is prepared according to the operation of step a;

[0016] Step c: Preparation of composite clarifier

[0017] SnO2, NaCl, CeO2 micro powder and La2O3 micro powder are weighed according to the formula ratio, and then put into a mixer for uniform mixing to obtain a composite clarifier.

[0018] In a second aspect, the present application provides a preparation method of an alkali-free glass substrate, which comprises the following steps:

[0019] S01: Ball milling of raw materials

[0020] Each component of the alkali-free glass substrate is ground and crushed to obtain a plurality of powdered raw materials;

[0021] S02: Mixing of powdered raw materials

[0022] According to the ratio of each component of the alkali-free glass substrate, each component is put into a first raw material weighing hopper, weighed again by a raw material dispensing and weighing device, and then conveyed into a mixing cylinder for mixing and stirring. After mixing and stirring for 1-2h, a mixed material is obtained.

[0023] S03: Tabletting of mixed material

[0024] The mixture is transported into the raw material tabletting frame through the first material guide pipe to be tabletted to obtain tabletted material;

[0025] S04: crushing of the tabletted material

[0026] The tabletted material is pushed to the feeding port of the crusher, and after discharging, falls into the crusher to be crushed to obtain granular material, which falls onto the conveyor belt and is transported to the second raw material hopper for storage;

[0027] S05: preparation of the alkali-free glass substrate

[0028] After the granular material is weighed by the second raw material hopper, it is put into the preheating kiln for preheating treatment, wherein the preheating temperature is 750-850°C, the preheating time is 1-2h, and after the preheating is completed, the preheated material is obtained, which is transported into the melting kiln for melting treatment and clarification treatment, and after homogenization and cooling, the alkali-free glass substrate is obtained.

[0029] In a third aspect, the present application provides a preparation device for the preparation method of the alkali-free glass substrate, which comprises, from left to right, a raw material temporary storage assembly, a mixture tabletting assembly, a tablet crushing assembly and a conveyor belt.

[0030] The raw material temporary storage assembly comprises, from top to bottom, a raw material sub-packaging and metering device and a raw material mixing device;

[0031] The raw material sub-packaging and metering device comprises a bearing bottom plate and a first raw material hopper uniformly distributed on the top edge of the bearing bottom plate;

[0032] The raw material mixing device comprises a mixing cylinder and a discharge pipe connected to the lower end of the mixing cylinder, a discharge valve is fitted on the discharge pipe, and a first material guide pipe is connected to the end of the discharge pipe away from the mixing cylinder;

[0033] The discharge port of the first raw material hopper is connected to a second material guide pipe, and one end of the second material guide pipe passes through the bearing bottom plate and is connected to the mixing cylinder;

[0034] A plurality of first bearing columns are fixedly installed on the outer circumferential surface of the mixing cylinder, and the bearing bottom plate is fixedly installed on the top of the first bearing columns;

[0035] The mixture tabletting assembly comprises a protective box and a raw material tabletting frame fixedly installed in the protective box;

[0036] A top plate is fixedly installed on the inner top end of the protective box, a pressing cylinder is fixedly installed on the lower bottom surface of the top plate, a pressing plate is fixedly installed on the output end of the pressing cylinder, and the pressing plate is slidingly installed in the raw material tabletting frame;

[0037] The mounting portion is fixed to the top surface of the protective box by a threaded connection mode;

[0038] Second bearing columns are fixedly installed at four corners of the exterior of the protective box;

[0039] Pushing grooves are formed at the lower ends of the left and right sides of the raw material tabletting frame, and a rectangular baffle frame is slidably installed in the two pushing grooves;

[0040] A mounting strip is fixedly installed on the two second bearing columns at the left end of the exterior of the protective box, a hydraulic column is installed on the right side of the mounting strip, and the output end of the hydraulic column is fixedly connected with the rectangular baffle frame;

[0041] A bottom plate is fixedly installed at the lower end of the interior of the protective box, and the rectangular baffle frame is slidably installed on the bottom plate;

[0042] First dust collecting holes are formed at the front and rear ends of the raw material tabletting frame, second dust collecting holes are formed at the left and right sides of the protective box and are in communication with the first dust collecting holes, a first dust collecting pipe is installed in the first dust collecting hole, one end of the first dust collecting pipe penetrating through the second dust collecting hole is in communication with a first dust collector, and the first dust collector is located below the protective box;

[0043] The tablet breaking assembly comprises a pulverizer and two second dust collectors installed above the pulverizer, second dust collecting pipes are in communication with the front and rear ends of the material box of the pulverizer, and one end of the second dust collecting pipe away from the material box of the pulverizer is in communication with the second dust collector;

[0044] Third bearing columns are fixedly installed on the exterior of the pulverizer shell;

[0045] The conveying belt is used for receiving the material from the discharge port of the pulverizer, and a second raw material measuring hopper is arranged at the tail end of the conveying belt;

[0046] The second raw material measuring hopper is used for storing the conveyed material on the conveying belt, and after the material is weighed, the material is sequentially put into a preheating kiln and a melting kiln for processing.

[0047] Further, the preparation device further comprises a preheating kiln and a melting kiln, which are used for sequentially preheating and melting the material weighed from the second raw material measuring hopper.

[0048] Further, the bearing bottom plate is fixedly installed with a protective shell on the top surface, and a plurality of first raw material measuring hoppers are located in the protective shell;

[0049] Feeding ports corresponding to the first raw material measuring hoppers are formed at the top edge of the protective shell.

[0050] Further, the first top cover is sealingly installed on the top surface of the mixing cylinder body, a first communication hole is formed in the center of the top surface of the first top cover, a second top cover is installed in the first communication hole, a first through hole is formed in the top surface of the second top cover along the circumferential direction, and the second material guide pipe is fixedly installed in the first through hole away from the discharge port of the first raw material metering hopper.

[0051] The stirring device is further installed in the mixing cylinder body, and the motor of the stirring device is installed on the top surface of the second top cover.

[0052] Further, the bottom surface of the discharge pipe is higher than the top surface of the protection box body.

[0053] Further, the first material guide pipe is communicated with the raw material tabletting frame through the protection box body away from the discharge pipe.

[0054] Further, the abutting plate is fixedly installed on the lower end of the right side surface of the protection box body, and the end of the abutting plate away from the protection box body is located in the feeding port of the crusher.

[0055] Compared with the prior art, the beneficial effects of the present application are:

[0056] 1. The present application provides an alkali-free glass substrate, which is clarified by using a composite clarifying agent, has a small clarifying agent consumption, and has excellent performance.

[0057] 2. The present application provides a preparation method of an alkali-free glass substrate, which reduces the use of clarifying agents, has a good clarifying effect, avoids the problems of stratification and agglomeration of the mixture by using a mixture tabletting process, and reduces the clarifying pressure and energy consumption in the melting process by using a preheating treatment method for the mixture.

[0058] 3. The present application provides a preparation device for a preparation method of an alkali-free glass substrate, which is used for raw material mixing, mixture tabletting and crushing, mixture conveying and conveying, and can continuously work, and is suitable for popularization and use. DETAILED DESCRIPTION

[0059] The accompanying drawings, which are included to provide a further understanding of the present application and constitute a part of this application, illustrate certain illustrative embodiments of the present application and are used to explain the present application, but do not limit the present application. In the drawings:

[0060] Figure 1 is a flow chart of the preparation method of the alkali-free glass substrate provided by the present application;

[0061] Figure 2 is a structural schematic view of the preparation device provided by the present application;

[0062] Figure 3 is a structural schematic view of the raw material temporary storage assembly provided by the present application;

[0063] Figure 4 is a structural explosion view of the raw material temporary storage assembly provided by the present application;

[0064] Figure 5 is a structural explosion view of the raw material temporary storage assembly provided by the present application;

[0065] Figure 6 is a structural schematic view of the batch tabletting assembly provided by the present application;

[0066] Figure 7 is a structural explosion view of the protective box provided by the present application;

[0067] Figure 8 is a structural explosion view of the protective box and the raw material tabletting frame provided by the present application;

[0068] Figure 9 is a connection schematic view of the tablet breaking assembly and the conveying belt provided by the present application. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0070] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0071] Embodiment 1

[0072] The present embodiment provides a composite clarifier, comprising the following preparation steps:

[0073] Step a: Preparation of CeO2 micro powder

[0074] Take CeO2, use the ball mill to carry on the ball grinding 10h after, obtain raw material powder, according to the ratio of raw material powder mass and volume 1:10 add anhydrous ethanol, mix stirring 1h, in the mixing stirring process, drop ammonia water control end point pH value is 8.5, after stirring is completed, stand 4h after filtration, use distilled water to wash, again with anhydrous ethanol wash 3 times after, obtain the crude filter product, the crude filter product is placed in the oven and is dried, set the drying temperature to 100 DEG C, drying time 4h, obtain the dried goods, the dried goods are calcined under nitrogen atmosphere 2h, set the calcination temperature to 550 DEG C, after calcination cooling obtains the calcined product, the calcined product is ground and crushed after 70 mesh sieve, preparation CeO2 micro powder body;

[0075] Step b: preparation of La2O3 micro powder

[0076] According to the operation of step a, La2O3 micro powder is prepared;

[0077] Step c: preparation of composite clarifier

[0078] According to the formula proportion, SnO2, NaCl, CeO2 micro powder, La2O3 micro powder is weighed and put into the mixer to mix uniformly, and then the composite clarifier is obtained.

[0079] Example 2

[0080] The present embodiment provides a composite clarifier, comprising the following preparation steps:

[0081] Step a: preparation of CeO2 micro powder

[0082] Take CeO2, use the ball mill to carry on the ball grinding 11h after, obtain raw material powder, according to the ratio of raw material powder mass and volume 1:10 add anhydrous ethanol, mix stirring 1.5h, in the mixing stirring process, drop ammonia water control end point pH value is 9, after stirring is completed, stand 5h after filtration, use distilled water to wash, again with anhydrous ethanol wash 4 times after, obtain the crude filter product, the crude filter product is placed in the oven and is dried, set the drying temperature to 110 DEG C, drying time 3h, obtain the dried goods, the dried goods are calcined under nitrogen atmosphere 1.5h, set the calcination temperature to 500 DEG C, after calcination cooling obtains the calcined product, the calcined product is ground and crushed after 60 mesh sieve, preparation CeO2 micro powder body;

[0083] Step b: preparation of La2O3 micro powder

[0084] According to the operation of step a, La2O3 micro powder is prepared;

[0085] Step c: preparation of composite clarifier

[0086] According to the formula proportion, SnO2, NaCl, CeO2micropowder and La2O3micropowder are weighed and put into a mixer to be mixed uniformly to obtain a composite clarifier.

[0087] The composite clarifier is prepared by the method, CeO2and La2O3are treated to obtain fine powder, so that the performance thereof can be improved, and the CeO2and La2O3are used for clarifying the alkali-free glass substrate, and are used together with SnO2and NaCl to achieve better clarifying effect.

[0088] Example 3

[0089] The embodiment provides a composite clarifier, comprising the following preparation steps:

[0090] Step a: preparation of CeO2micropowder

[0091] CeO2is weighed, ball milling is performed by using a ball mill for 12 hours to obtain raw material powder, anhydrous ethanol is added according to the ratio of the mass and volume of the raw material powder being 1:10, mixing and stirring are performed for 2 hours, ammonia water is added dropwise to control the final pH value to be 9.5 during the mixing and stirring process, after the stirring is completed, the mixture is left to stand for 6 hours and then filtered, the filter cake is washed with distilled water and then washed with anhydrous ethanol for 5 times to obtain a crude filter cake, the crude filter cake is placed in an oven for drying, the drying temperature is set to be 120 DEG C, the drying time is set to be 2 hours, a dried product is obtained, the dried product is calcined in a nitrogen atmosphere for 1 hour, the calcination temperature is set to be 450 DEG C, and a calcined product is obtained after cooling, the calcined product is ground and crushed and then passed through a 50-mesh sieve to prepare CeO2micropowder.

[0092] Step b: preparation of La2O3micropowder

[0093] According to the operation of step a, La2O3micropowder is prepared.

[0094] Step c: preparation of a composite clarifier

[0095] According to the formula proportion, SnO2, NaCl, CeO2micropowder and La2O3micropowder are weighed and put into a mixer to be mixed uniformly to obtain a composite clarifier.

[0096] Example 4

[0097] As shown in Figure 1 The embodiment provides a preparation method of an alkali-free glass substrate, and the method comprises the following steps:

[0098] S01: ball milling of raw materials

[0099] According to the formula, each component of the alkali-free glass substrate is ground and crushed to obtain a plurality of powdery raw materials.

[0100] S02: mixing of the powdered raw materials

[0101] According to the formula, each component of the alkali-free glass substrate is put into the first raw material measuring hopper, weighed again through the raw material sub-packaging measuring device, and then transported into the mixing cylinder for mixing and stirring. After 1-2 h of mixing and stirring, the mixed material is obtained. Multiple weighing is performed to ensure the accuracy of the proportioning of each component and reduce the proportioning composition error caused by feeding loss;

[0102] S03: tabletting of the mixed material

[0103] The mixed material is transported into the raw material tabletting frame through the first material guide pipe for tabletting and forming, and the tabletted material is obtained.

[0104] S04: crushing of the tabletted material

[0105] The tabletted material is pushed to the feeding port of the crusher, and after unloading, it falls into the crusher for crushing, and the granular material is obtained. The granular material falls onto the conveyor belt and is transported to the second raw material measuring hopper for storage.

[0106] S05: preparation of the alkali-free glass substrate

[0107] After the granular material is weighed by the second raw material measuring hopper, it is put into the preheating kiln for preheating treatment. The preheating temperature is 750-850°C, and the preheating time is 1-2 h. After preheating is completed, the preheated material is obtained. The preheated material is transported into the melting kiln for melting treatment and refining treatment. After homogenization and cooling, the alkali-free glass substrate is obtained.

[0108] The preparation method of the alkali-free glass substrate provided in this embodiment tabletts and crushes the mixed material, and then performs preheating treatment. After the preheating treatment is completed, the material is put into the melting kiln for melting treatment. This preparation method can effectively reduce the agglomeration of the alkali-free glass substrate batch and facilitate the glass melting process.

[0109] The preheating treatment method is used for the batch, the salt reaction gas has been basically discharged, the refining pressure is reduced, and the energy consumption of the melting process is reduced.

[0110] Example 5

[0111] The alkali-free glass substrate provided in this embodiment contains, in terms of mole percentage, 60% of SiO2, 20% of Al2O3, 6% of B2O3, 6% of MgO, 3% of CaO, 3% of SrO, 1% of BaO, and 1% of a composite refining agent.

[0112] In terms of mole percentage, the composite refining agent contains 25% of CeO2, 40% of La2O3, and 35% of SnO2.

[0113] The preparation method of the composite clarifier is as described in Example 2, and the preparation method of the alkali-free glass substrate is as described in Example 4. The related parameters of the prepared alkali-free glass substrate are shown in Table 1.

[0114] Example 6

[0115] The present example provides an alkali-free glass substrate containing, in terms of mole percentage, 66% of SiO2, 10% of Al2O3, 13.5% of B2O3, 3% of MgO, 3% of CaO, 3% of SrO, 1% of BaO, and 0.5% of a composite clarifier.

[0116] The composite clarifier contains, in terms of mole percentage, 40% of CeO2, 22% of La2O3, 30% of SnO2, and 8% of NaCl.

[0117] The preparation method of the composite clarifier is as described in Example 2, and the preparation method of the alkali-free glass substrate is as described in Example 4. The related parameters of the prepared alkali-free glass substrate are shown in Table 1.

[0118] Example 7

[0119] The present example provides an alkali-free glass substrate containing, in terms of mole percentage, 72% of SiO2, 8% of Al2O3, 10.9% of B2O3, 3% of MgO, 3% of CaO, 3% of SrO, and 0.1% of a composite clarifier.

[0120] The composite clarifier contains, in terms of mole percentage, 38% of CeO2, 24% of La2O3, 32% of SnO2, and 6% of NaCl.

[0121] The preparation method of the composite clarifier is as described in Example 2, and the preparation method of the alkali-free glass substrate is as described in Example 4. The related parameters of the prepared alkali-free glass substrate are shown in Table 1.

[0122] Example 8

[0123] The present example provides an alkali-free glass substrate containing, in terms of mole percentage, 65% of SiO2, 8% of Al2O3, 14% of B2O3, 3% of MgO, 5% of CaO, 4.5% of SrO, and 0.5% of a composite clarifier.

[0124] The composite clarifier contains, in terms of mole percentage, 40% of CeO2, 20% of La2O3, 35% of SnO2, and 5% of NaCl.

[0125] The preparation method of the composite fining agent is as shown in Example 2, and the preparation method of the alkali-free glass substrate is as shown in Example 4. The related parameters of the prepared alkali-free glass substrate are shown in Table 1.

[0126] Example 9

[0127] The present example provides an alkali-free glass substrate containing, in terms of mole percentage, 60% of SiO2, 12% of Al2O3, 10% of B2O3, 5% of MgO, 5% of CaO, 5% of SrO, 2% of BaO, and 1% of a composite fining agent.

[0128] The composite fining agent contains, in terms of mole percentage, 40% of CeO2, 40% of La2O3, and 20% of SnO2.

[0129] The preparation method of the composite fining agent is as shown in Example 2, and the preparation method of the alkali-free glass substrate is as shown in Example 4. The related parameters of the prepared alkali-free glass substrate are shown in Table 1.

[0130] Example 10

[0131] The present example provides an alkali-free glass substrate containing, in terms of mole percentage, 70% of SiO2, 9.5% of Al2O3, 6% of B2O3, 5% of MgO, 4% of CaO, 4% of SrO, 1% of BaO, and 0.5% of a composite fining agent.

[0132] The composite fining agent contains, in terms of mole percentage, 35% of CeO2, 30% of La2O3, 30% of SnO2, and 5% of NaCl.

[0133] The preparation method of the composite fining agent is as shown in Example 2, and the preparation method of the alkali-free glass substrate is as shown in Example 4. The related parameters of the prepared alkali-free glass substrate are shown in Table 1.

[0134] Table 1: Alkali-free glass substrate

[0135]

[0136] Note 1: In the determination of the glass fining effect, bubbles with a diameter of 0.5 mm or more are defined as large bubbles, and bubbles with a diameter of less than 0.5 mm are defined as gray bubbles. The number of bubbles in a unit volume is less than 0.5 per cm 3 The fining effect is good;

[0137] Note 2: The dielectric constant is determined by using an impedance analyzer;

[0138] Note 3: The elastic modulus is determined according to GB / T 37788-2019, and the unit is GPa;

[0139] Note 4: The coefficient of thermal expansion of glass at 30-300℃ was determined using a thermal expansion meter, and the unit is 10. -6 / ℃.

[0140] Example 11

[0141] like Figures 2 to 9 As shown, this embodiment provides a preparation equipment for a method of preparing an alkali-free glass substrate, including a raw material storage assembly 1, a batch material tableting assembly 2, a tablet crushing assembly 3, and a conveyor belt 4 arranged sequentially from left to right.

[0142] The preparation equipment also includes a preheating kiln 5 and a melting kiln 6, which are used to preheat and melt the material weighed from the second raw material metering hopper 7 in sequence.

[0143] The raw material temporary storage component 1 includes a raw material dispensing and metering device 11 and a raw material mixing device 12 arranged sequentially from top to bottom;

[0144] The raw material dispensing and metering device 11 includes a supporting base plate 111 and a first raw material metering hopper 112 evenly distributed on the top edge of the supporting base plate 111.

[0145] The raw material mixing device 12 includes a mixing cylinder 121 and a discharge pipe 122 connected to the lower end of the mixing cylinder 121. A discharge valve 123 is installed on the discharge pipe 122, and a first guide pipe 124 is connected to the end of the discharge pipe 122 away from the mixing cylinder 121.

[0146] The discharge port of the first raw material metering hopper 112 is connected to the second guide pipe 115, and the second guide pipe 115 passes through one end of the bearing bottom plate 111 and is connected to the mixing cylinder 121.

[0147] A protective shell 113 is fixedly installed on the top surface of the supporting base plate 111, and multiple first raw material metering hoppers 112 are located inside the protective shell 113;

[0148] The top edge of the protective shell 113 has a feeding port 114 that corresponds one-to-one with the first raw material metering hopper 112;

[0149] A first top cover 125 is sealed on the top surface of the mixing cylinder 121. A first connecting hole 126 is opened in the center of the top surface of the first top cover 125. A second top cover 127 is installed in the first connecting hole 126. A first through hole 128 is opened along the circumferential direction on the edge of the top surface of the second top cover 127. The end of the second guide pipe 115 away from the discharge port of the first raw material metering hopper 112 is fixedly installed in the first through hole 128.

[0150] A stirring device 129 is also installed inside the mixing cylinder 121, and the motor on the stirring device 129 is mounted on the top surface of the second top cover 127.

[0151] The outer circumferential surface of the mixing barrel 121 is fixedly installed with a plurality of first bearing columns 133, and the bearing bottom plate 111 is fixedly installed on the top of the first bearing column 133.

[0152] The mixing material tabletting assembly 2 comprises a protective box 21 and a raw material tabletting frame 22 fixedly installed in the protective box 21.

[0153] The top plate 211 is fixedly installed at the inner upper end of the protective box 21, and the lower bottom surface of the top plate 211 is fixedly installed with a pressing cylinder, and the output end of the pressing cylinder is fixedly installed with a pressing plate which is slidingly installed in the raw material tabletting frame 22.

[0154] The mounting portion 23 is installed on the outside of the top plate 211 and is fixed to the top surface of the protective box 21 by a threaded connection.

[0155] The second bearing columns 214 are fixedly installed at the four corners on the outside of the protective box 21.

[0156] The lower end of the left and right sides of the raw material tabletting frame 22 is provided with a pushing groove 221, and the two pushing grooves 221 are slidingly installed with a rectangular baffle frame 222.

[0157] The mounting strip 215 is fixedly installed on the two second bearing columns 214 at the left end of the protective box 21, and the hydraulic column 216 is installed on the right side of the mounting strip 215, and the output end of the hydraulic column 216 is fixedly connected with the rectangular baffle frame 222.

[0158] The bottom plate 217 is fixedly installed at the inner lower end of the protective box 21, and the rectangular baffle frame 222 is slidingly installed on the bottom plate 217.

[0159] The bottom surface of the discharge pipe 122 is higher than the top surface of the protective box 21.

[0160] The end of the first material guide pipe 124 away from the discharge pipe 122 penetrates through the protective box 21 and communicates with the raw material tabletting frame 22.

[0161] The front and rear ends of the raw material tabletting frame 22 are provided with first dust collecting holes 224, and the front and rear sides of the protective box 21 are provided with second dust collecting holes 24 which communicate with the first dust collecting holes 224, and the first dust collecting holes 224 are installed with first dust collecting pipes 225, and one end of the first dust collecting pipe 225 penetrating through the second dust collecting hole 24 is communicated with the first dust collector 226 which is located below the protective box 21.

[0162] The tablet breaking assembly 3 comprises a pulverizer 31 and two second dust collectors 32 installed above the pulverizer 31, and the front and rear ends of the material box of the pulverizer 31 are communicated with second dust collecting pipes 33, and one end of the second dust collecting pipe 33 away from the material box of the pulverizer 31 is communicated with the second dust collector 32.

[0163] The right side lower end of the protection box 21 is fixedly provided with an abutting plate 218, and the end of the abutting plate 218 away from the protection box 21 is located in the feeding port of the crusher 31;

[0164] The third bearing column 34 is fixedly arranged outside the shell of the crusher 31.

[0165] The conveying belt 4 is used for receiving the material from the discharge port of the crusher 31, and the tail end of the conveying belt 4 is provided with the second raw material metering hopper 7.

[0166] The second raw material metering hopper 7 is used for storing the conveyed material on the conveying belt 4, and after the material is weighed, the material is sequentially fed into the preheating kiln 5 and the melting kiln 6 for processing.

[0167] The preparation equipment of the preparation method of the alkali-free glass substrate provided in the embodiment can realize continuous tabletting operation on the mixed material, is used for raw material mixing, mixture tabletting, crushing, mixture conveying and conveying, ensures continuous actual production, and can be popularized and used.

[0168] The alkali-free glass substrate, the preparation method and the preparation equipment thereof are provided, the components of the alkali-free glass substrate are set, a reference is provided for preparation of the alkali-free glass substrate, a composite refining agent is prepared and is applied to a refining process of the alkali-free glass substrate, and a better refining effect is obtained, the preparation method of the alkali-free glass substrate provides a reference basis for pretreatment and preheating treatment of the glass mixture, and the preparation equipment of the preparation method of the alkali-free glass substrate provides the preparation equipment for the preparation method of the alkali-free glass substrate.

[0169] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0170] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. An apparatus for producing an alkali-free glass substrate, characterized by comprising: The raw material temporary storage assembly (1), the mixed material tablet pressing assembly (2), the tablet crushing assembly (3) and the conveying belt (4) are sequentially arranged from left to right. The raw material temporary storage assembly (1) comprises a raw material sub-packaging and metering device (11) and a raw material mixing device (12) arranged in sequence from top to bottom. The raw material sub-packaging and metering device (11) comprises a bearing bottom plate (111) and a first raw material metering hopper (112) uniformly distributed on the top edge of the bearing bottom plate (111). The raw material mixing device (12) comprises a mixing cylinder (121) and a discharge pipe (122) communicated with the lower end of the mixing cylinder (121), a discharge valve (123) is mounted on the discharge pipe (122), and a first guide pipe (124) is communicated with the end of the discharge pipe (122) away from the mixing cylinder (121). The discharge port of the first raw material metering hopper (112) is communicated with a second guide pipe (115), one end of the second guide pipe (115) passes through the bearing bottom plate (111) and is communicated with the mixing cylinder (121). A plurality of first bearing columns (133) are fixedly installed on the outer circumferential surface of the mixing cylinder (121), and the bearing bottom plate (111) is fixedly installed on the top of the first bearing column (133). The mixed material tablet pressing assembly (2) comprises a protective box (21) and a raw material tablet pressing frame (22) fixedly installed in the protective box (21). A top plate (211) is fixedly installed on the inner top end of the protective box (21), a pressing cylinder is fixedly installed on the lower bottom surface of the top plate (211), a pressing plate is fixedly installed on the output end of the pressing cylinder, and the pressing plate is slidingly installed in the raw material tablet pressing frame (22). An installation part (23) is installed on the outside of the top plate (211), and the installation part (23) is fixed to the top surface of the protective box (21) by a threaded connection mode. Second bearing columns (214) are fixedly installed at the four corners of the outside of the protective box (21). Pushing grooves (221) are opened at the lower ends of the left and right sides of the raw material tablet pressing frame (22), and a rectangular baffle frame (222) is slidingly installed in the two pushing grooves (221). An installation strip (215) is fixedly installed on the two second bearing columns (214) at the left end of the outside of the protective box (21), a hydraulic column (216) is installed on the right side of the installation strip (215), and the output end of the hydraulic column (216) is fixedly connected with the rectangular baffle frame (222). A bottom plate (217) is fixedly installed at the lower end of the inside of the protective box (21), and the rectangular baffle frame (222) is slidingly installed on the bottom plate (217). The first dust collecting hole (224) is arranged in the front and rear ends of the raw material tabletting frame (22), the second dust collecting hole (24) is arranged in the front and rear sides of the protective box (21) and is communicated with the first dust collecting hole (224), the first dust collecting pipe (225) is arranged in the first dust collecting hole (224), one end of the first dust collecting pipe (225) penetrating through the second dust collecting hole (24) is communicated with the first dust collector (226), and the first dust collector (226) is arranged below the protective box (21); The tablet breaking assembly (3) comprises a pulverizer (31) and two second dust collectors (32) arranged above the pulverizer (31), the second dust collecting pipe (33) is arranged in the front and rear ends of the material box of the pulverizer (31), and one end of the second dust collecting pipe (33) away from the material box of the pulverizer (31) is communicated with the second dust collector (32); The third bearing column (34) is fixedly arranged outside the shell of the pulverizer (31); The conveying belt (4) is used for receiving the material discharged from the discharge port of the pulverizer (31), and the tail end of the conveying belt (4) is provided with the second raw material metering hopper (7); The second raw material metering hopper (7) is used for storing the material transmitted on the conveying belt (4), and the material is sequentially put into the preheating kiln (5) and the melting kiln (6) for treatment after being weighed; One end of the first material guide pipe (124) away from the discharge pipe (122) penetrates through the protective box (21) and is communicated with the raw material tabletting frame (22); The abutting plate (218) is fixedly arranged at the lower end of the right side of the protective box (21), and one end of the abutting plate (218) away from the protective box (21) is arranged in the feeding port of the pulverizer (31).

2. The apparatus according to claim 1, wherein The protective shell (113) is fixedly arranged on the top surface of the bearing bottom plate (111), and the first raw material metering hoppers (112) are arranged in the protective shell (113). The feeding ports (114) corresponding to the first raw material metering hoppers (112) are arranged at the top edge of the protective shell (113).

3. The apparatus according to claim 1, wherein The first top cover (125) is sealingly arranged on the top surface of the mixing cylinder (121), the first communication hole (126) is arranged in the center of the top surface of the first top cover (125), the second top cover (127) is arranged in the first communication hole (126), the first through hole (128) is arranged at the top edge of the second top cover (127) in the circumferential direction, and one end of the second material guide pipe (115) away from the discharge port of the first raw material metering hopper (112) is fixedly arranged in the first through hole (128). The agitator (129) is arranged in the mixing cylinder (121), and the motor of the agitator (129) is arranged on the top surface of the second top cover (127).

4. The apparatus according to claim 1, wherein The bottom surface of the discharge pipe (122) is higher than the top surface of the protective box (21).

5. A method for producing an alkali-free glass substrate, which is performed using the apparatus for producing an alkali-free glass substrate according to any one of claims 1 to 4, characterized by The method comprises the following steps: S01: Ball milling of raw materials The components of the alkali-free glass substrate are respectively subjected to grinding and crushing treatment to obtain a plurality of powdery raw materials; S02: Mixing of powdery raw materials According to the proportioning of each component of the alkali-free glass substrate, each component is put into a first raw material measuring hopper (112), weighed again by a raw material sub-packaging and weighing device (11), and then delivered into a mixing cylinder (121) for mixing and stirring. After 1-2 hours of mixing and stirring, the mixture is obtained. S03: tabletting of the mixture The mixture is delivered into a raw material tabletting frame (22) through a first material guide pipe (124) for tabletting and forming, and the tabletted material is obtained. S04: crushing of the tabletted material The tabletted material is pushed to the feeding port of a crusher (31), discharged, and then dropped into the crusher (31) for crushing, and the granular material is obtained. The granular material is dropped onto a conveyor belt (4), delivered to a second raw material measuring hopper (7) through the conveyor belt (4), and stored. S05: preparation of the alkali-free glass substrate After the granular material is weighed by the second raw material measuring hopper (7), it is put into a preheating kiln (5) for preheating treatment. The preheating temperature is 750-850°C, and the preheating time is 1-2 hours. After preheating, the preheated material is obtained. The preheated material is delivered into a melting kiln (6) for melting and refining treatment, and then homogenized and cooled to obtain the alkali-free glass substrate.

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