CN107915394B - Calcium-magnesium-aluminum-silicon building float glass-ceramic channel and use method thereof - Google Patents
Calcium-magnesium-aluminum-silicon building float glass-ceramic channel and use method thereof Download PDFInfo
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- CN107915394B CN107915394B CN201711232791.0A CN201711232791A CN107915394B CN 107915394 B CN107915394 B CN 107915394B CN 201711232791 A CN201711232791 A CN 201711232791A CN 107915394 B CN107915394 B CN 107915394B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
- C03B7/06—Means for thermal conditioning or controlling the temperature of the glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
- C03B7/06—Means for thermal conditioning or controlling the temperature of the glass
- C03B7/07—Electric means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention relates to a calcium-magnesium-aluminum-silicon building float glass microcrystalline glass material channel and a use method thereof, belonging to the technical field of microcrystalline glass production, wherein the material channel comprises a material channel main body consisting of a tank bottom, a tank wall and a cover plate, a shell is arranged outside the material channel main body, a discharge tank and a stirring tank are arranged inside the material channel main body, a glass liquid temperature measuring device and a glass liquid heating device are arranged between the cover plate and the shell, a heating space is arranged between the cover plate and the shell, a space temperature measuring device and a space heating device are arranged between the cover plate and the shell, all measured temperature data are transmitted to a DCS automatic control system to control and adjust the temperature of corresponding positions, and hot air circulation holes are arranged in the tank wall, finally, the defects of the microcrystalline glass product after tin bath forming operation are greatly reduced, and the yield is obviously improved.
Description
Technical Field
The invention belongs to the technical field of microcrystalline glass production, and particularly relates to a calcium-magnesium-aluminum-silicon building float glass microcrystalline glass material channel and a use method thereof.
Background
At present, the microcrystalline glass production process mainly adopts a rolling method and a sintering method, the yield of the microcrystalline glass produced by the rolling method in the whole country in 2014 reaches 1400 ten thousand square meters, the yield of the microcrystalline glass produced by the sintering method is only 15 ten thousand square meters, and no mature float microcrystalline glass product exists in the market. The calendering method is the dominant practice in the market, and has many problems: fluoride is generally adopted as a crystal nucleus agent, so that the refractory material is corroded, and the environment is polluted; the surface flatness of the product is not high, the mechanical polishing amount is large, and the yield is low; thick and thin plates cannot be produced. The development of the microcrystalline glass by the rolling method is restricted by the problems, and the whole microcrystalline glass and microcrystalline material industry develops relatively slowly in the aspects of productivity and quality level.
Compared with the traditional sintering method and rolling method microcrystalline glass, the calcium-magnesium-aluminum-silicon building float glass microcrystalline glass has the advantages of no fluoride in composition, high surface flatness of products, high yield, capability of producing thin plates and thick plates with the thickness of 3-18 mm and the like, has wide market application prospect, has obvious advantages in the aspects of productivity, quality, cost and the like, has higher production process difficulty, and faces the difficulties of high melting temperature, high melting quality, clarification and homogenization, float molding, crystallization and annealing and the like, particularly the calcium-magnesium-aluminum-silicon building float glass microcrystalline glass is easy to generate crystallization in local parts due to temperature reduction, and the stable production and the product quality are seriously influenced. In the production process of the calcium-magnesium-aluminum-silicon building float glass ceramics, the position which is most easy to generate crystallization is a material channel connecting a melting furnace and a tin bath. The common plate glass and daily glass material channel in the current production does not meet the requirements of the production process of the glass ceramics, the existing glass ceramics material channel also does not meet the production process of the float glass ceramics, the problems of local crystallization, easy generation of stripe and the like, unstable product quality control and the like exist, the structure of the material channel connected with the forming equipment is not suitable for the forming condition of the calcium-magnesium-aluminum-silicon building float glass ceramics, the technical requirements of the production of the calcium-magnesium-aluminum-silicon building float glass ceramics can not be met, and a material channel structure and a process control method which meet the production requirements of the float glass ceramics must be designed on the basis of the existing material channel.
Disclosure of Invention
The invention overcomes the defects and shortcomings in the prior art, and provides a glass-ceramic material channel for float process of building, the special structure and control system of the material channel can improve the flowing and temperature difference distribution conditions of glass liquid, improve the quality of the glass liquid, eliminate the defects of stripes, wave bands and the like, prevent the occurrence of production accidents of local crystallization, large fluctuation of quality and the like, and provide the glass liquid meeting the forming requirements of the glass-ceramic float process.
The specific technical scheme of the invention is as follows:
the float glass-ceramic material channel for Ca-Mg-Al-Si building is used as the flow channel of molten glass and connected between the output end of smelting furnace and the input end of tin bath, and includes main body of material channel formed from wall, bottom and cover plate for flowing molten glass and its external heat-insulating shell body, the bottom of the tank is provided with a horizontal channel and a rising channel which are connected in front and back at an inlet, the tail part of the material channel is provided with a flow flashboard, the contact part of the flow flashboard and the molten glass is provided with a heating element, the material channel is provided with a lip brick outside the flow flashboard for connecting with the input end of the molten tin bath, a group of discharging grooves provided with discharging systems are arranged at the bottom of the tank along the flowing direction of the molten glass, a heating space is arranged between the cover plate and the heat-insulating shell, a group of hot air circulation holes are arranged in the wall of the tank, and the heating space is connected with a hot air circulation system by virtue of the hot air circulation holes; the material channel is provided with a temperature control system, which comprises a controller, a group of glass liquid temperature measuring devices and a group of glass liquid heating devices, a stirring system, a group of space temperature measuring devices and a group of space heating devices, wherein the glass liquid temperature measuring devices and the group of glass liquid heating devices are connected with the controller, the group of glass liquid temperature measuring devices and the group of space heating devices are arranged in the material channel main body, the stirring system is arranged in the material channel main body, the group of space temperature measuring devices are arranged in a heating space, the group of space heating devices are arranged in the heating space, the controller is also connected with a discharging system and a hot air circulating system, heating elements are arranged at the.
The glass liquid temperature measuring device is respectively located at the inlet of the material channel main body, the discharging groove and the flow flashboard, and the space temperature measuring devices are the same in number and are in one-to-one correspondence with the glass liquid temperature measuring devices in mounting positions.
The length of the material channel is 4-6m when the daily melting amount of the glass liquid is 50-100t, the width of the material channel main body is 800-1000mm, and the height is 400-500 mm.
The tank bottom end face at the outlet of the material channel main body and the upper end face of the lip brick are positioned on the same plane, and the plane is an inclined angle with the rear end inclined downwards by 3-5 degrees.
The heating space is divided into a group of independent heating zones along the flowing direction of the molten glass, and a space temperature measuring device and a space heating device are arranged in each heating zone.
The key point of the using method of the calcium-magnesium-aluminum-silicon building float glass ceramic channel is that the using method comprises the following steps:
A. glass liquid input
The molten glass flows into the material channel main body from the output end of the melting furnace;
B. molten glass conditioning
The glass liquid temperature measuring device transmits the measured temperature to the controller, the controller adjusts the glass liquid heating device to ensure that the temperatures measured by the glass liquid temperature measuring devices positioned at the inlet of the material channel main body and the flow gate plate are 1350-; the space temperature measuring devices transmit the measured temperature to the controller, the controller adjusts the space heating devices so that the temperatures measured by the two space temperature measuring devices at the head end and the tail end are respectively 1450 ℃ and 1300 ℃, and the temperatures measured by the other space temperature measuring devices sequentially decrease along the glass liquid flowing direction and are positioned between 1300 ℃ and 1400 ℃; the hot air circulating system transfers redundant heat in the heating space to the pool wall through the hot air circulating holes, or cools the heating space in a cold air blowing mode; the flow gate plate controls the output flow of the molten glass, and the controller controls the heating element on the flow gate plate to ensure that the temperature of the molten glass is not less than 1250 ℃;
C. treatment of rejected glass
When the glass liquid is crystallized, the controller starts the discharging system to discharge the glass liquid at the bottom of the tank, meanwhile, the controller improves the power of the glass liquid heating device and the space heating device, controls the hot air circulating system to blow cold air, enables the temperature of the glass liquid to be above the crystallization temperature, enables the temperature of the glass liquid before the flow gate to be kept stable until the crystallization phenomenon disappears, and controls the discharging system to gradually stop discharging; when the molten glass has the defects of stripes, striae, poor quality and the like, the controller starts the stirring system to stir, meanwhile, the controller adjusts the heating element on the stirring system to ensure that the temperature of the molten glass contacted with the stirring system is not reduced, and after the defects are eliminated, the controller controls the stirring system to stop working gradually;
D. glass liquid output
The glass liquid flows into the tin bath after passing through the flow flashboard and the lip brick.
The improved beneficial effects of the invention are as follows: compared with the existing material channel, the material channel can completely solve the problem of crystallization of the material channel in the production process of the microcrystalline glass, and the crystallization parts such as the common tank wall, the tank bottom, the stirring system, the flow gate and the like can effectively prevent liquid glass of the material channel from crystallizing through the hot air circulating system, the discharging system and the heating element; according to the invention, through the structural layout of the material channel and the layout of the temperature control elements, the temperature of the glass liquid at the designated position can be accurately measured, the temperature distribution condition of the glass liquid can be accurately adjusted, and the clarification and homogenization quality of the glass liquid can be improved; the invention sets a whole set of control system according to the production process requirements of the building float glass-ceramic, can realize the quality adjustment of the glass liquid, and control the temperature and viscosity of the glass liquid at the outlet of the material channel, thereby forming the glass liquid which has high quality and meets the float forming conditions, then the glass liquid enters the tin bath for forming, the produced glass liquid has good quality and is more stable, the local crystallization can be effectively prevented, the generation of the defects of stripes, ribs and the like is greatly reduced, and the product quality and the yield of the building float glass-ceramic are greatly improved.
Drawings
FIG. 1 is a schematic view showing a connecting structure of a chute, a melting furnace and a tin bath according to the present invention.
FIG. 2 is a schematic view of the internal structure of the chute of the present invention.
Fig. 3 is a cross-sectional view a-a of fig. 2.
Fig. 4 is a cross-sectional view B-B of fig. 2.
In the drawing, 1 is a melting furnace, 2 is a material channel, 3 is a tin bath, 4 is a controller, 202 is a bath bottom, 203 is a bath wall, 204 is a cover plate, 205 is a discharge tank, 207 is a heating space, 208 is a hot air circulation hole, 209 is a stirring paddle, 301 is a safety shutter, 302 is a flow shutter, 303 is a lip brick, 401 is a glass liquid temperature measuring device, 402 is a glass liquid heating device, 403 is a space temperature measuring device, 404 is a space heating device, and 414 is a hot air circulation system.
Detailed Description
The invention relates to a calcium-magnesium-aluminum-silicon building float glass microcrystalline glass material channel, wherein a material channel 2 is used as a flow channel of glass liquid and is connected between the output end of a melting furnace 1 and the input end of a tin bath 3, the material channel comprises a material channel main body and an external heat insulation shell, the material channel main body is formed by a pool wall 203, a pool bottom 202 and a cover plate 204 and is used for flowing the glass liquid, the pool bottom 202 is provided with a horizontal channel and a rising channel which are connected in front and back at the inlet, the arrangement of the horizontal channel and the rising channel avoids the uncontrollable speed of the glass liquid when the glass liquid initially enters the material channel main body, when the glass liquid rises to the uppermost end along the rising channel, the glass liquid enters the material channel main body in an overflow mode, the flowing speed of the glass liquid can be accurately controlled through flow, the tail part of the material channel 2 is provided with a flow flashboard 302, the, the material channel 2 is provided with a lip brick 303 used for being connected with the input end of a tin bath 3 outside the flow gate 302, the pool bottom 202 is provided with a group of discharging troughs 205 provided with discharging systems along the flowing direction of molten glass, a heating space 207 is arranged between the cover plate 204 and the heat-insulating shell, a group of hot air circulation holes 208 are arranged in the pool wall 203, and the heating space 207 is connected with a hot air circulation system 414 by virtue of the hot air circulation holes 208; the material channel 2 is provided with a temperature control system, which comprises a controller 4, a group of glass liquid temperature measuring devices 401 and a group of glass liquid heating devices 402 which are connected with the controller and arranged in a material channel main body, a stirring system arranged in the material channel main body, a group of space temperature measuring devices 403 arranged in a heating space 207 and a group of space heating devices 404 arranged in the heating space 207, wherein the controller 4 is also connected with a discharging system and a hot air circulating system 414, a heating element is arranged at a contact part of the stirring system and the glass liquid, and the stirring system and the heating element on the flow gate plate 302 are both connected with the controller 4.
In the specific embodiment, as shown in fig. 1 to 4, the material channel 2 is provided with a safety gate 301 at the end position of the bottom 202 of the tank, which is used as an emergency means for stopping the flow of molten glass rapidly and does not work under normal conditions when an accident occurs and the production needs to be stopped, a flow gate 302 is arranged at the rear end of the safety gate 301 and at the end position of the upper end surface of a lip brick 303, the middle part and the rear part of the material channel main body are respectively provided with a discharge chute 205, a discharge system in the discharge chute 205 is provided with a platinum leakage pipe, the molten glass is discharged out of the bottom of the material channel 2 through the platinum leakage pipe under the operation of the discharge system, the discharge system in the discharge chute 205 comprises a discharge hole at the bottom of the discharge chute 205, the bottom of the discharge hole is provided with a discharge leakage plate made of heat-resistant steel, the brick used in the discharge hole is a piece of zirconia brick, the center of which has a circular hole with a diameter of 30mm, the bottom, the center diameter of a circular hole of 50mm of the discharging leakage plate coincides with the center of a discharging hole brick, when the discharging leakage plate is not used, a stopper rod made of zirconium mullite material is used for plugging the hole of the discharging leakage plate and performing air blowing cooling on the discharging leakage plate to prevent glass liquid from flowing out, when the discharging leakage plate is used, the stopper rod is removed and heats the discharging leakage plate, then the glass liquid flows out from the discharging leakage plate to achieve the discharging purpose, and a glass liquid temperature measuring device 401 is correspondingly installed at the position of each discharging groove 205, so that four glass liquid temperature measuring devices 401 are arranged in the material channel main body, the glass liquid temperature measuring devices 401 are temperature thermocouples which are platinum-coated thermocouples and are respectively arranged at the inlet of the material channel main body, at the positions of the two discharging grooves 205 and at the position of a flow gate plate 302, the glass liquid heating device 402 is a ten groups of molybdenum electrode heating systems arranged along the flowing direction of the glass liquid, and each molybdenum electrode, the heating space 207 is divided into four independent heating zones along the glass melt flowing direction, each heating zone is provided with a space temperature measuring device 403 and a space heating device 404, each heating zone can independently measure the temperature and control the temperature, the space temperature measuring device 403 is a temperature measuring thermocouple, and the space heating device 404 is a carbon silicon rod heating system;
the stirring system is arranged above the stirring hole and comprises a stirrer capable of moving up and down, the stirrer adopts a stirring form of a stirring paddle 209, when the stirring system works, the stirring paddle extends downwards from the stirring hole to enter molten glass, a motor connected to the upper end of the stirring paddle controls the stirring speed and direction of the stirring paddle, a platinum heating element is arranged at a contact part of the stirrer and the molten glass, a platinum heating element is also arranged at a contact part of a flow flashboard 302 and the molten glass, all the platinum heating elements are connected with a power supply device, and the molten glass can be heated as required to prevent crystallization;
a group of hot air circulation holes 208 which are uniformly distributed are formed between the outer side of the pool wall 203 and the heat preservation shell, each hot air circulation hole 208 penetrates through the pool wall 203 and is connected with a hot air circulation system 414, when the temperature in the heating space is not higher than the required temperature, the fan 414 is closed, hot air is discharged to the outside of the pool wall 203 along the hot air circulation hole 208, when the temperature is higher than the required temperature, the fan 414 is started to blow cold air, the temperature in the heating space can be rapidly reduced, each hot air circulation hole 208 can independently feed cold air or discharge hot air by means of the hot air circulation system 414, and heat in the heating space 207 can be transferred to the pool wall 203 through the hot air circulation holes 208 to heat the pool wall;
based on the structure, molten glass enters the material channel main body from the melting furnace 1, the material channel 2 adjusts the temperature and the quality of the glass liquid through the controller 4 and then enters the tin bath 3 for molding, the controller 4 is a DSC automatic control system, and the specific using method of the material channel comprises the following steps:
A. glass liquid input
The molten glass flows into the material channel main body from the output end of the melting furnace 1;
B. molten glass conditioning
The four glass liquid temperature measuring devices 401 sequentially arranged along the glass liquid flowing direction transmit the measured temperatures to the DSC automatic control system, the DSC automatic control system adjusts the glass liquid heating device 401 so that the measured temperatures of the four temperature measuring thermocouples are 1350-;
all the space temperature measuring devices 403 transmit the measured temperatures to the DSC automatic control system, and the DSC automatic control system adjusts the space heating device 404 so that the temperatures measured by the four space temperature measuring devices 403 are respectively 1400-;
the hot air circulation system 414 transfers the redundant heat in the heating space 207 to the tank wall 203 through the hot air circulation holes 208, so that the temperature of the glass liquid contacting with the tank wall 203 is improved, the devitrification of the glass liquid at the edge part is prevented, the transverse temperature difference of the glass liquid is reduced, or the heating space 207 is cooled in a cold air blowing mode, and the flow of the glass liquid entering the tin bath 3 is prevented from being out of control; the flow gate plate 302 controls the output flow of the molten glass, the molten glass contacting with the flow gate plate 302 is easy to crystallize due to the reduction of temperature and flow velocity, and the adjustment precision of the flow of the molten glass is influenced, and a DSC automatic control system ensures that the temperature of the molten glass is not less than 1250 ℃ by controlling a heating element on the flow gate plate 302;
C. treatment of rejected glass
When the glass liquid is crystallized, the DSC automatic control system starts the discharging system to discharge the glass liquid at the bottom of the tank, so that the fluidity of the glass liquid in the material channel main body is improved, meanwhile, the DSC automatic control system improves the power of the glass liquid heating device 402 and the space heating device 404, the temperature of the middle lower part, the upper part and the edge part of the glass liquid is improved, so that the temperature of the glass liquid is above the crystallization temperature, a hot air circulating system 414 is controlled to blow cold air, the temperature of the glass liquid before the flow gate plate 302 is kept stable, the stability of the forming production process of the tin bath 3 is ensured, and the DSC automatic control system controls the discharging system to stop working gradually until the crystallization phenomenon;
when the defects of stripes, ribs, poor quality and the like appear in the molten glass, the DSC automatic control system adjusts the operation depth, the rotating speed and the steering of the stirring device, eliminates the defects and improves the homogenization quality of the molten glass, meanwhile, the DSC automatic control system adjusts the heating element on the stirrer in the stirring system, so that the temperature of the molten glass in contact with the DSC automatic control system is not lower than 1250 ℃, the rotating speed, the depth and the steering are continuously adjusted in the early stage of production, the state when the quality of the molten glass is stable is set as working parameters, when the defects appear, the stirring depth is improved or reduced according to the defect generation part, and the stirring rotating speed is improved or reduced according to different defects. For example, if the bottom surface has crystallization, the stirring depth is reduced, the rotating speed is increased, the fluidity of the glass liquid is improved, the temperature distribution is improved, and the crystallization is eliminated; when the stripes appear, the rotating speed is increased or reduced until the stripes disappear, different adjusting methods are needed for different defects, a technician is required to provide instructions, and the stirring system DCS system executes the instructions.
D. Glass liquid output
The glass liquid flows into the tin bath 3 after passing through the flow flashboard 302 and the lip brick 303, the DCS automatic control system rapidly adjusts the temperature of the glass liquid at the outlet of the material channel 2 according to different forming requirements of the tin bath 3, the temperature of the glass liquid at the position of the lip brick 303 is 1215-1230 ℃ and above, and the corresponding viscosity is not less than 102.5Pa.S, the temperature of the glass liquid at the lip tile 303 is adjusted and controlled in advance through the heating temperature of the molybdenum electrode at the flow gate 302, so as to ensure that the viscosity of the glass liquid entering the tin bath 3 is suitable for the float forming requirement.
Claims (6)
1. The utility model provides a calcium magnesium aluminium silicon building float process microcrystalline glass material way, this material way (2) are connected between melting furnace (1) output and molten tin bath (3) input as the flow path of glass liquid, including pool wall (203), bottom of the pool (202) and apron (204) constitute be used for the material way main part that the glass liquid flows and outside heat preservation casing, its characterized in that: the device comprises a tank bottom (202), a flow gate plate (302) is arranged at the tail of a material channel, a heating element is arranged at the contact part of the flow gate plate (302) and molten glass, a lip brick (303) used for being connected with the input end of a tin bath (3) is arranged at the flow gate plate (302) of the material channel (2), a group of discharging tanks (205) provided with discharging systems are arranged at the tank bottom (202) along the flowing direction of the molten glass, a heating space (207) is arranged between a cover plate (204) and a heat-insulating shell, a group of hot air circulation holes (208) are arranged in a tank wall (203), and the heating space (207) is connected with a fan (414) outside the tank wall (203) by means of the hot air circulation holes (208); the material channel (2) is provided with a temperature control system, which comprises a controller (4), a group of glass liquid temperature measuring devices (401) and a group of glass liquid heating devices (402) which are connected with the controller and arranged in a material channel main body, a stirring system arranged in the material channel main body, a group of space temperature measuring devices (403) and a group of space heating devices (404) which are arranged in a heating space (207), the controller (4) is also connected with a discharging system and a hot air circulating system, a heating element is arranged at a contact part of the stirring system and the glass liquid, and the heating elements on the stirring system and the flow flashboard (302) are connected with the controller (4).
2. The calcium-magnesium-aluminum-silicon building float glass ceramic channel according to claim 1, characterized in that: the glass liquid temperature measuring devices (401) are respectively positioned at the inlet of the material channel main body, the discharge groove (205) and the flow gate plate (302), and the space temperature measuring devices (403) are the same as the glass liquid temperature measuring devices (401) in number and are in one-to-one correspondence with the installation positions.
3. The calcium-magnesium-aluminum-silicon building float glass ceramic channel according to claim 1, characterized in that: the length of the material channel (2) when the daily melting amount of the glass liquid is 50-100t is 4-6m, the width of the material channel main body is 800-1000mm, and the height is 400-500 mm.
4. The calcium-magnesium-aluminum-silicon building float glass ceramic channel according to claim 1, characterized in that: the upper end surface of the pool bottom (202) at the outlet of the material channel main body and the upper end surface of the lip brick (303) are positioned on the same plane, and the plane is an inclination angle with the rear end inclined downwards by 3-5 degrees.
5. The calcium-magnesium-aluminum-silicon building float glass ceramic channel according to claim 1, characterized in that: the heating space (207) is divided into a group of independent heating zones along the flow direction of the molten glass, and a space temperature measuring device (403) and a space heating device (404) are arranged in each heating zone.
6. The use method of the calcium-magnesium-aluminum-silicon building float glass ceramic channel as claimed in claim 1, wherein the use method comprises the following steps:
A. glass liquid input
The molten glass flows into the material channel main body from the output end of the melting furnace (1);
B. molten glass conditioning
The glass liquid temperature measuring device (401) transmits the measured temperature to the controller (4), the controller (4) adjusts the glass liquid heating device (402) to enable the temperatures measured by the glass liquid temperature measuring devices (401) positioned at the inlet of the material channel main body and the flow gate plate (302) to be 1350-; the space temperature measuring devices (403) transmit the measured temperature to the controller (4), the controller (4) adjusts the space heating devices (404) so that the temperatures measured by the two space temperature measuring devices (403) at the head end and the tail end are respectively 1400 ℃ and 1250 ℃ and 1300 ℃, and the temperatures measured by the other space temperature measuring devices (403) sequentially decrease along the glass liquid flowing direction and are positioned between 1300 ℃ and 1400 ℃; the hot air circulating system (414) transfers the redundant heat in the heating space (207) to the pool wall (203) through the hot air circulating holes (208), or cools the heating space (207) in a cold air blowing mode; the flow gate plate (302) controls the output flow of the molten glass, and the controller (4) ensures that the temperature of the molten glass is not less than 1250 ℃ by controlling a heating element on the flow gate plate (302);
C. treatment of rejected glass
When the glass liquid is crystallized, the controller (4) starts the discharging system to discharge the glass liquid at the bottom of the pool (202), meanwhile, the controller (4) improves the power of the glass liquid heating device (402) and the space heating device (404), controls the hot air circulating system (414) to blow cold air, enables the temperature of the glass liquid to be above the crystallization temperature, enables the temperature of the glass liquid before the flow gate plate (302) to be kept stable until the crystallization phenomenon disappears, and controls the discharging system to gradually stop discharging by the controller (4); when the molten glass has the defects of stripes, striae, poor quality and the like, the controller (4) starts the stirring system to stir, meanwhile, the controller (4) adjusts the heating element on the stirring system to ensure that the temperature of the molten glass contacted with the stirring system is not reduced, and after the defects are eliminated, the controller (4) controls the stirring system to gradually stop working;
D. glass liquid output
The glass liquid flows into the tin bath (3) after passing through the flow flashboard (302) and the lip brick (303).
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| CN109437520B (en) * | 2019-01-10 | 2021-06-01 | 江西鼎盛新材料科技有限公司 | Novel forming device and method for float glass ceramics |
| CN113233736A (en) * | 2021-04-25 | 2021-08-10 | 中国建材国际工程集团有限公司 | Float glass melting furnace with contraction type clarification area |
| CN115259637A (en) * | 2022-08-12 | 2022-11-01 | 浙江大学 | Rapid forming device and method for ultra-large single glass device |
| CN115626761B (en) * | 2022-10-31 | 2023-12-29 | 沧州四星玻璃股份有限公司 | Method for preventing crystallization on surface of medium borosilicate glass tube |
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| CN104843970A (en) * | 2015-04-14 | 2015-08-19 | 南京航空航天大学 | Method for rapidly adjusting viscosity of glass liquid through electric heating material channel |
| CN106630552A (en) * | 2016-09-19 | 2017-05-10 | 东华大学 | Forehearth coloring device for preparation of colored glass |
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| CN204434463U (en) * | 2015-01-06 | 2015-07-01 | 河北省沙河玻璃技术研究院 | A kind of devitrified glass melting furnaces material duct device |
| CN104843970A (en) * | 2015-04-14 | 2015-08-19 | 南京航空航天大学 | Method for rapidly adjusting viscosity of glass liquid through electric heating material channel |
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