CN114212968A

CN114212968A - An Experimental UTG Glass Brick Forming Method

Info

Publication number: CN114212968A
Application number: CN202210009850.2A
Authority: CN
Inventors: 李民
Original assignee: Anhui Hanrou Photoelectric Technology Co ltd
Current assignee: Anhui Hanrou Photoelectric Technology Co ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-03-22

Abstract

The invention discloses an experimental UTG glass brick forming method. According to the batching material list, the glass powder is comprehensively inspected; the powder particles can be selectively deleted, dried, agglomerated, etc. The crushed glass is dried, screened, and cleaned to ensure the consistency of the batch of crushed glass; after the powder is mixed, mix it evenly; put it into the furnace; Material: During the feeding process, keep the distance between the glass liquid level in the mold and the discharge port; preheat the mold; make insulation layers on both sides and top of the mold to ensure the glass liquid contact surface and temperature balance; annealing the glass; use diamond Wire cutting machine for cutting and retrieving; testing chemical strength parameters for effective comparison. It can maximize the saving of operating economic costs, and detect the accuracy and quality of different glass batches. Timely judge the generation difference between the strength parameters of glass products and the market demand.

Description

Experimental UTG glass brick molding method

Technical Field

The invention belongs to a glass production technology, and particularly relates to an experimental UTG glass brick molding method.

Background

In the initial stage of operation of the UTG (Uitra Thin glass) glass production line, the product quality needs to be upgraded and updated according to the market demand, and the market demand is followed in time. Indexes such as stress, chemical strength and flexibility of a glass product need to be compared or upgraded with the latest market product, and the glass batch needs to be checked in advance in the early stage of production of a melting furnace. The production method of the experimental glass brick needs a set of systematic glass brick generation technology. The glass forming technology adopts: the platinum crucible unloading and the electric heating mold forming are integrated, and the phenomena of flow marks, cracks and the like generated in the glass forming process can be well eliminated.

Disclosure of Invention

The present invention is directed to an experimental UTG glass block molding process. The accuracy and the excellence of the different glass batch recipes are detected.

The technical scheme of the invention is as follows:

an experimental UTG glass block molding method, comprising:

(1) according to the mixture list, performing comprehensive inspection on the glass powder; powder particles can be selectively selected, subjected to drying treatment, caking treatment and the like according to actual requirements, and the pre-added cullet is subjected to drying, screening and cleaning treatment, so that the batch consistency of the cullet is ensured;

(2) when powder is prepared, the reading of the number needs to be accurate, and the weighing accuracy is as follows: 0.01 g; the phenomenon of weighing less or material leakage is avoided;

(3) after the powder materials are mixed well, uniformly mixing; putting the mixture into a furnace;

(5) heating, stirring, clarifying, cooling and discharging;

and (3) heating: within 20 hours, heating from 1450 ℃ to 1590 ℃;

stirring: rotating positively for 20min, stopping at intervals for 20 min; reverse rotation is carried out for 20min, and the interval stops for 20min, and the rotating speed is set as follows: 12R/min;

clarification: then preserving the heat for 24 hours at 1590 ℃;

cooling: then cooling from 1590 ℃ to 1350 ℃ at the rate of 10 ℃/hour;

unloading: in the material receiving process, the distance between the liquid level of the glass in the die and the discharge opening is kept 35 mm; preheating a mold, and heating to 550 ℃; heat insulation layers are required to be manufactured on the two sides and the top of the mold, so that the contact surface of glass liquid and the temperature balance are ensured; and after the material receiving is finished, waiting for 3-5 minutes until the glass bricks are molded, pushing the glass bricks to an annealing furnace by using a preheated ejector rod device, and carrying out annealing operation. (6) Annealing of the glass: generally, a 550 ℃ adjustable high-temperature furnace is adopted, annealing is carried out at 50 ℃ per hour according to the characteristics of a glass material, the time interval is 2 hours, the temperature is reduced to be below 200 ℃, the glass is naturally cooled to a normal temperature state by power failure, and then the glass batch can be taken out and marked; (7) and cutting and taking the slices by a diamond linear cutting machine. (8) Testing strong parameters and carrying out effective comparison.

The experimental UTG glass brick forming method is characterized in that, matching with the requirement of glass powder cleanliness, the magnetic bar is screened, and the magnetic bar is used according to the specification: 10000 Gauss magnet rod.

The experimental UTG glass brick molding method is characterized in that the granularity of glass powder is required to be 20 meshes, and the glass powder is dried for 2 hours in cooperation with the powder.

The experimental UTG glass brick molding method is characterized in that cullet at the bottom of a crucible is filled before feeding, the cullet is generally about 3 kilograms, the particle size of the cullet is required to be 8 meshes, and the frequency of powder feeding intervals is required to be 20 min/time.

The experimental UTG glass brick forming method is characterized in that in the initial stage of discharging, the current of a discharging pipe needs to be gradually reduced, the temperature of the discharging pipe is controlled to 1100 ℃, and the temperature of a crucible is controlled to 1430 ℃.

The experimental UTG glass brick molding method is characterized in that the feeding rod is made of 310S stainless steel, the length of the feeding rod is 1.8m, and the feeding rod extends into a furnace body part by 0.8 m. A positioning groove device is arranged at the furnace door, so that the spoon opening is consistent with the center of the platinum crucible when feeding.

The experimental UTG glass brick molding method is characterized in that the stirring temperature point required by the glass frit formula is 1500 ℃. The temperature is calculated according to the material formula and is set up by combining a viscosity temperature curve.

The experimental UTG glass brick molding method is characterized in that the temperature is raised to 1590 ℃ and kept for 24 hours for clarification; the glass powder which is generally difficult to be compatible is improved and placed at 1620 ℃ for clarification operation; to improve clarification effect, the following methods are commonly adopted: adding cosolvent, raising clarifying temperature, prolonging clarifying time and regulating recipe ratio.

The experimental UTG glass brick forming method is characterized in that the mould needs to be quickly aligned with the center of the discharge pipe for material receiving, and the height difference between the pouring liquid level and the discharge pipe is controlled to be 35mm.

The experimental UTG glass brick molding method is characterized in that the cold zone time after glass molding is 3-5 minutes, and the annealing cooling rate is 50 ℃/2 h; and naturally cooling, batch marking, defect inspection, cutting and scribing the formed and annealed glass brick.

The invention has the advantages that:

the method can save the running economic cost to the maximum extent, and detect the accuracy and the excellence of different glass batch recipes. And (5) judging the generation difference comparison between the glass product strengthening parameters and the market demands in time. Simple and convenient operation, time saving and high efficiency. And performing comprehensive and overdue inspection on the glass powder according to the mixture list. According to actual requirements, powder particles can be selectively selected, dried, agglomerated and the like, and the pre-added cullet is dried, screened and cleaned, so that the batch consistency of the cullet is ensured.

Drawings

FIG. 1 is a crucible process run schedule.

FIG. 2 is a glass stirring operation schedule.

Fig. 3 is a schematic view of the mold structure.

Fig. 4 is a schematic view of a heating rod structure.

Reference numbers in the figures: 1. a mold base plate; 2. a side frame of the mold; 3. 4, heating a rod; 5. a heating wire.

Detailed Description

An experimental UTG glass block molding method, comprising:

(5) heating, stirring, clarifying, cooling and discharging;

and (3) heating: within 20 hours, heating from 1450 ℃ to 1590 ℃;

clarification: then preserving the heat for 24 hours at 1590 ℃;

cooling: then cooling from 1590 ℃ to 1350 ℃ at the rate of 10 ℃/hour;

The cooperation glass powder cleanliness factor requirement, through the bar magnet screening, the bar magnet specification is used: 10000 Gauss magnet rod.

The granularity of the glass powder is required to be 20 meshes, and the glass powder is dried for 2 hours in cooperation with the powder.

Before feeding, filling and paving cullet at the bottom of the crucible, generally about 3 kilograms, wherein the particle size of the cullet is required to be 8 meshes, and the frequency of powder feeding intervals is required to be 20 min/time.

In the initial stage of unloading, the current of the discharge tube needs to be gradually reduced, the temperature of the discharge tube is controlled to 1100 ℃, and the temperature of the crucible is controlled to 1430 ℃.

The feeding rod is made of 310S stainless steel, the length of the feeding rod is 1.8m, and the feeding rod extends into the furnace body part by 0.8 m. A positioning groove device is arranged at the furnace door, so that the spoon opening is consistent with the center of the platinum crucible when feeding.

The stirring temperature point required for the glass frit is 1500 ℃. The temperature is calculated according to the material formula and is set up by combining a viscosity temperature curve.

Heating to 1590 deg.C, and standing for 24 hr for clarification; the glass powder which is generally difficult to be compatible is improved and placed at 1620 ℃ for clarification operation; to improve clarification effect, the following methods are commonly adopted: adding cosolvent, raising clarifying temperature, prolonging clarifying time and regulating recipe ratio.

The material receiving of the die needs to be quickly aligned to the center of the discharge pipe, and the height difference between the pouring liquid level and the discharge pipe is controlled to be 35mm.

The time of the cold zone after the glass is formed is 3-5 minutes, and the annealing cooling rate is 50 ℃/2 h; and naturally cooling, batch marking, defect inspection, cutting and scribing the formed and annealed glass brick.

Before cutting, the glass needs to be pasted and positioned by a hot melting rod with the diameter of 5mm x 100 mm.

The material quality of the die is as follows: 310S stainless steel. The size of the bottom plate is as follows: 800mm 500mm 35mm. die volume: 300 x 180 x 80 mm.

The heating rod is as follows: and (5) silicon carbide rod material. The glass melting device is used for clarification, stirring and homogenization in a platinum crucible. The cooling is realized by a method of prolonging the temperature of the discharge pipe. The glass forming is completed by a splicing type electric heating mould. When powder is prepared, the reading of the number needs to be accurate, and the weighing accuracy is as follows: 0.01g, the phenomenon of weighing less or material leakage is avoided. After the powder materials are mixed, a three-dimensional dynamic mixer is used for mixing for about 30 min;

and a powder barrel with a mark is used for containing powder.

Feeding according to the feeding curve and the technological requirements, and paying attention to the cleanliness of powder and the temperature maintenance condition of the furnace during feeding. According to the drawing, a crucible operation schedule: heating, stirring, clarifying, cooling and discharging.

And (3) forming the glass in the mould.

And (3) forming:

temperature points of a discharge pipe opening: 1550 ℃.

② the electric heating mould is heated up to 550 ℃ in advance for 2 hours, and the heating rods are inserted into the slots and are shown in the figure IV. Monitoring the position: the two sides of the mould and the bottom plate of the mould are 3 points in total, and a K-type external plug-in thermocouple is used. And fourthly, heat insulation layers with the thickness of 20mm are required to be manufactured on the two sides and the top of the mold, so that the contact surface of glass liquid and the temperature balance are ensured. Checking the measurement of the size of the receiving mould. Seventhly, after the material receiving is finished, waiting for 3-5 minutes until the glass brick is formed, pushing the glass brick to an annealing furnace by using a preheated ejector rod device, and performing annealing operation; 8. and (4) annealing the glass. Generally, a 550 ℃ adjustable high-temperature furnace is adopted, annealing is carried out at 50 ℃ per hour according to the characteristics of a glass material, the time interval is 2 hours, the temperature is reduced to be below 200 ℃, the glass is naturally cooled to a normal temperature state by power failure, and then the glass batch can be taken out and marked; 9. and cutting and taking the slices by a diamond linear cutting machine. 10. Testing strong parameters and carrying out effective comparison.

Claims

1. The experimental UTG glass block forming method is characterized in that comprising:

(1) According to the batching material list, check the glass powder comprehensively and expiry; according to the actual needs, the powder particles can be selectively deleted, dried, agglomerated, etc., and the pre-added broken glass is dried , screening and cleaning to ensure the consistency of broken glass batches;

(2) When preparing powder materials, the reading numbers should be accurate and accurate to prevent the phenomenon of less weighing or material leakage;

(3) After the powder is mixed well, mix it evenly; put it into a platinum crucible;

(5) Carry out heating, stirring, clarification, cooling, and unloading operations;

Discharging: During the receiving process, keep the distance between the glass liquid level in the mold and the discharge opening; preheat the mold; make insulation layers on both sides and top of the mold to ensure the contact surface of the glass liquid and the temperature balance; after the material receiving is completed, Wait 3-5 minutes for the glass bricks to be formed, and use the preheated ejector device to push the glass bricks to the annealing furnace for annealing operation; (6) Annealing of glass; (7) Use diamond wire cutting machine to cut and take pieces ; (8) Test the strength parameters for effective comparison.

2. The experimental UTG glass brick molding method according to claim 1, characterized in that, in accordance with the requirements of the cleanliness of the glass powder, after being screened by a magnetic bar, the specifications of the magnetic bar are used: strong magnetic bar 10000 Gauss magnet bar.

3. The experimental UTG glass block forming method according to claim 1, wherein the particle size of the glass powder is required to be 20 meshes, and the powder is to be dried for 2 hours.

4. experimental UTG glass block molding method according to claim 1, is characterized in that, before feeding, will carry out crucible bottom cullet filling and paving, generally about 3 kilograms, cullet particle size requires 8 meshes, powder feeding interval frequency 20min/time is required.

5. The experimental UTG glass brick molding method according to claim 1, characterized in that, in the initial stage of unloading, it is necessary to gradually reduce the discharge pipe current, control the discharge pipe temperature to 1100°C, and the crucible temperature to 1430°C.

6. The experimental UTG glass block forming method according to claim 1, is characterized in that, the charging rod adopts 310S stainless steel, the length is 1.8m, and the depth of the furnace body is 0.8m; The mouth of the spoon is consistent with the center of the platinum crucible.

7 . The experimental UTG glass block forming method according to claim 1 , wherein the glass frit side requires that the stirring temperature point be 1500° C.; the temperature is calculated according to the material side, and the setting of the stirring temperature point is carried out in conjunction with the viscosity-temperature curve. 8 .

8. The experimental UTG glass block forming method according to claim 1, characterized in that, the temperature is set at 1590°C and maintained for 24 hours to carry out the clarification operation; the generally difficult glass powder is raised and set at 1620°C to carry out the clarification operation; The clarification effect is commonly used: ① increase the co-solvent, ② increase the clarification temperature, ③ prolong the clarification time, and ④ adjust the formula ratio.

9 . The experimental UTG glass block forming method according to claim 1 , wherein the mold splicing needs to be quickly aligned with the center of the discharge pipe, and the height difference between the pouring liquid level and the discharge pipe is controlled to be 35 mm. 10 .

10. The experimental UTG glass brick forming method according to claim 1, characterized in that, the cooling zone time after glass forming is 3-5 minutes, and the annealing cooling rate is 50°C/2h; Free cooling, batch identification, defect inspection, cutting and scribing.