CN108455826A - Molten tin bath tin pollution object cancellation element and method and its application - Google Patents
Molten tin bath tin pollution object cancellation element and method and its application Download PDFInfo
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- CN108455826A CN108455826A CN201810019570.3A CN201810019570A CN108455826A CN 108455826 A CN108455826 A CN 108455826A CN 201810019570 A CN201810019570 A CN 201810019570A CN 108455826 A CN108455826 A CN 108455826A
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- gas
- molten tin
- tin bath
- guide tube
- pollution object
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/18—Controlling or regulating the temperature of the float bath; Composition or purification of the float bath
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention mainly relates to float glass manufacturing fields, disclose a kind of molten tin bath tin pollution object cancellation element and method and application, the molten tin bath tin pollution object cancellation element includes air extractor, exhaust pipe, exhaust apparatus and gas-guide tube with Insulation, the exhaust pipe is symmetrically connected to the two sides of exhaust apparatus, and the symmetrically arranged exhaust pipe is connected by gas-guide tube, the gas-guide tube is connected with air extractor, and the exhaust pipe is equipped with control valve.The present invention can make molten tin bath not generate cassiterite defect substantially, tail end tin ash amount is also greatly reduced, and the purging work frequency is reduced to original 1/3, effectively solves the problems, such as molten tin bath tin pollution, and the cleanliness factor and stability of entire molten tin bath room atmosphere are increased, effectively increase the quality of finished glass.
Description
Technical field
Decontaminate other fields of gas the present invention relates to float glass manufacturing field and needing, and in particular to a kind of
Molten tin bath tin pollution object cancellation element and method and application.
Background technology
Enter in the glass metal in molten tin bath from melting furnaces and carries a large amount of SO3, meanwhile, penetrate into tin liquor meeting in molten tin bath high temperature section
There is a certain amount of O2It is penetrated into inside molten tin bath from the external world.Tin liquor under 950 DEG C or more high temperature easily with SO3、O2It is reacted：4Sn+
SO3=3SnO+SnS, Sn+3SnO+SO3=3SnO2+ SnS, 2Sn+O2=2SnO, Sn+O2=SnO2.It is certain when having in tin liquor
The SnS and SnO of quantity2When, it will can occur to react as follows：SnS+SnO2→SnSO4+ 2Sn, SnSO4It is good tin plating material
Material, but it is adsorbed on glass sheet lower surface, while Sn itself is also easy and SnSO4Complexing can cause glass sheet lower surface to generate tin
Ash and tin sticky defect.
The oxide of tin exists at 870 DEG C or more in gaseous state, and gasification at high temperature enters in protection gas, and 870 DEG C or less are in
Solid-state exists, and is dissolved in tin liquor.The oxide of tin has certain solubility in tin liquor and protection gas, and temperature is higher, dissolving
Degree is bigger, and when pollutant load is more than tin liquor solubility, tin ash is precipitated, and glass plate is easily adhered to after running up to a certain amount of
Lower surface is taken out of, and lower surface ash is caused to print.
Tin pollution object gasifies at high temperature into protection gas, and protection gas is in general there are two outlet, leading portion and rear end,
There is adjusting flashboard in leading portion outlet, brings out in the past after tin pollution object easily condenses crystallization and causes cassiterite defect, and tin pollution is discharged from rear end
Object easily causes Xi Zha, tin sticky defect.Therefore, the generation of glass molten tin bath just will appear cassiterite is few, and scruff is more or cassiterite is more, and scruff is few etc.
Situation.Currently, there are no good methods to solve the above problems in float process, scruff, cassiterite problem perplex always entire float glass process
Production.Thus, it would be highly desirable to study it is a kind of eliminating the device of molten tin bath tin pollution object, method, to clear away the obstacle in glass production.
Invention content
The purpose of the invention is to overcome glass sheet lower surface in prior art float process to be also easy to produce tin ash and tin sticky
Defect occurs the problems such as cassiterite is few, and scruff is more or cassiterite is more, and scruff is few in molten tin bath, provides a kind of molten tin bath tin pollution object and eliminates dress
It sets and method and application.
To achieve the goals above, one aspect of the present invention provides a kind of molten tin bath tin pollution object cancellation element and method and answers
With the molten tin bath tin pollution object cancellation element includes air extractor, exhaust pipe, exhaust apparatus and gas-guide tube, the exhaust pipe pair
Claim the two sides for being connected to exhaust apparatus, and the symmetrically arranged exhaust pipe is connected by gas-guide tube, the gas-guide tube
It is connected with air extractor, the exhaust pipe is equipped with control valve.
Preferably, draft booster, the gas inlet of the draft booster are additionally provided between control valve and gas-guide tube
Mouth is equipped with flow detector, and the waste gas inlet is connected by control valve with exhaust pipe, the row of the draft booster
Gas port is connected with air extractor, water inlet is being equipped with close to the vent position, close to the waste gas inlet position
Equipped with water outlet.
Preferably, the exhaust apparatus is internally provided with guiding device；It is further preferred that the guiding device is led for arc
Tracheae.
Preferably, it is additionally provided with cassiterite clean-up port in the lower end of exhaust pipe and exhaust apparatus.
Preferably, the exhaust apparatus is fumer.
Preferably, the gas-guide tube is arc gas-guide tube.
Second aspect of the present invention provides a kind of application of molten tin bath tin pollution object cancellation element in the gas that decontaminates.
Preferably, in float glass manufacture, the molten tin bath tin pollution object cancellation element is located at chute cover board and zero shellfish is close
Between envelope, the optional cassiterite clean-up port in the molten tin bath tin pollution object cancellation element is outside runner glass metal.
Second aspect of the present invention provides a kind of using the molten tin bath tin pollution object cancellation element elimination molten tin bath tin pollution object
Method, under air extractor air-extraction function, protective gas enters molten tin bath region inner space, makes protective gas and glass liquid phase
Xiang Erhang, polluted gas are controlled by control valve in exhaust pipe with exhaust apparatus of the protective gas flow direction with Insulation
Gas flow converges, and molten tin bath region is discharged into gas-guide tube.
Preferably, the holding temperature is 700-950 DEG C.
Preferably, further include enhancing draft measure, the enhancing draft measure is also set between control valve and gas-guide tube
Have with cooling device can make by gas generate the 200-500 DEG C of temperature difference draft booster.
Preferably, the cooling device is water cooling equipment.
Preferably, the gas flow is adjusted by the aperture or closing cooling device of adjusting control valve (5).
Preferably, the gas flow is the single side 60-200, and total amount is the side 120-400.
Preferably, further include cassiterite cleaning measure, the cassiterite cleaning measure is the lower end in exhaust pipe and exhaust apparatus
Equipped with cassiterite clean-up port.
Through the above technical solutions, the present invention can make molten tin bath not generate cassiterite defect substantially, tail end tin ash amount also greatly subtracts
Few, the purging work frequency is reduced to original 1/3, effectively solves the problems, such as molten tin bath tin pollution, and increase entire molten tin bath room atmosphere
Cleanliness factor and stability, effectively increase the quality of finished glass.
Description of the drawings
Fig. 1 is molten tin bath tin pollution object cancellation element side view in float process of the present invention.
Fig. 2 is molten tin bath tin pollution object cancellation element front view of the present invention.
Fig. 3 is the enlarged drawing of draft booster in molten tin bath tin pollution object cancellation element of the present invention.
Fig. 4 is that molten tin bath tin pollution object eliminates process schematic representation in float process of the present invention.
Reference sign
1- chute cover boards, 2- molten tin bath tin pollution object cancellation elements of the present invention, the sealing of zero shellfishes of 3-, 4- air extractors, 5- controls
Valve, 6- exhaust pipes, 7- guiding devices, 8- exhaust apparatus, 9- gas-guide tubes, 10- cassiterites clean-up port, 11- draft boosters, 12- streams
Amount detector, 13- water inlets, 14- water outlets, 15- waste gas inlets, 16- floss holes.
Specific implementation mode
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
The specific implementation mode of the present invention is described in detail below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
One aspect of the present invention provides a kind of molten tin bath tin pollution object cancellation element, as shown in Fig. 2, including air extractor 4, exhaust
Pipe 6, the exhaust apparatus 8 with Insulation and gas-guide tube 9, the exhaust pipe 6 are symmetrically connected to the two sides of exhaust apparatus 8,
And the symmetrically arranged exhaust pipe 6 is connected by gas-guide tube 9, and the gas-guide tube 9 is connected with air extractor 4, described
Exhaust pipe 6 is equipped with control valve 5.
The present invention changes the flow direction of polluted gas by air extractor first, then keeps polluted gas suitable by exhaust apparatus
Profit enters exhaust passage, and molten tin bath does not generate cassiterite defect substantially, and tail end tin ash amount is also greatly reduced, and the purging work frequency is reduced to
Original 1/3, effectively solves the problems, such as molten tin bath tin pollution.
In the present invention, thoroughly change in order to which polluted gas flows to, flowing to the pollutant of low-temperature region becomes few, makes production
Raw defect oxide is not up to saturation, effectively avoids the generation of outlet tin ash, is also set between control valve 5 and gas-guide tube 9
There are draft booster 11, the waste gas inlet 15 of the draft booster 11 to be equipped with flow detector 12, the gas inlet
Mouth 15 is connected by control valve 5 with exhaust pipe 6, and the exhaust outlet 16 of the draft booster 11 is connected with air extractor 4,
It is equipped with water inlet 13 close to 16 position of the exhaust outlet, water outlet 14 is being equipped with close to 15 position of the waste gas inlet.
In the present invention, in order to use be more in line with fluid flowing design shape, avoid generating vortex in the process,
Glass quality is influenced, the exhaust apparatus 8 is internally provided with guiding device 7, it is preferable that the guiding device 7 is arc gas-guide tube.
In the present invention, is flowed from low-temperature region to high-temperature area to further solve polluted gas, arranged from high-temperature area
The defect of cassiterite condensation landing, the exhaust apparatus 8 are the fumer with lagging facility when putting.
According to the present invention, it is additionally provided with cassiterite clean-up port 10 in the lower end of exhaust pipe 6 and exhaust apparatus 8, tin has been effectively treated
The discharge of stone will not impact glass sheet quality.
According to the present invention, the gas-guide tube 9 is arc gas-guide tube, can effectively avoid and generates vortex in the process, influences glass
Glass quality.
Second aspect of the present invention provides a kind of application of molten tin bath tin pollution object cancellation element in the gas that decontaminates.
Under preferable case, in float glass manufacture, the molten tin bath tin pollution object cancellation element is located at chute cover board and zero
Between shellfish sealing, for the optional cassiterite clean-up port in the molten tin bath tin pollution object cancellation element outside runner glass metal, molten tin bath is basic
Cassiterite defect is not generated, and tail end tin ash amount is also greatly reduced, and the purging work frequency is reduced to original 1/3, and it is dirty effectively to solve molten tin bath tin
Dye problem.
Second aspect of the present invention provides a kind of using the molten tin bath tin pollution object cancellation element elimination molten tin bath tin pollution object
Method, under 4 air-extraction function of air extractor, protective gas enters molten tin bath region inner space, makes protective gas and glass metal
It goes in the same direction, polluted gas is controlled by control valve 5 and is vented with exhaust apparatus 8 of the protective gas flow direction with Insulation
Gas flow converges in pipe 6, and molten tin bath region is discharged into gas-guide tube 9.Wherein, it refers to walking for protective gas and glass metal to go in the same direction
To opposite.
The present invention mainly by changing process operation, allows protection air-flow is most of to flow to high-temperature region by low-temperature region
Domain, as drive polluted gas is also flowed from low-temperature region to high-temperature area and is discharged by molten tin bath tin pollution object cancellation element,
Since degree of dissolution saturation is higher than under low-temperature condition at high operating temperatures, it is flowed from low-temperature region to high-temperature area and from height
Temperature area not will produce pollutant when discharging and condense low defect.Apparatus of the present invention, polluted gas are not used to be arranged in high-temperature region
Cassiterite is will produce during putting to fall in glass metal, and glass plate upper surface is caused to generate cassiterite defect.Using apparatus of the present invention
In discharge gas, since the position of cassiterite condensation is in apparatus of the present invention, is collected, will not be dropped onto by discharge tube
Glass metal surface effectively avoids cassiterite defect；Simultaneously because polluted gas flow direction is changed, the dirt of low-temperature region is flowed to
Dye object tails off, and the defect oxide of generation is made to be not up to saturation, effectively avoids the generation of outlet tin ash, fairly perfect solution
Cassiterite is few in molten tin bath, and scruff is more, and cassiterite is more, the few situation of scruff.
According to the present invention, the holding temperature be 700-950 DEG C, for example, can be 700 DEG C, 710 DEG C, 720 DEG C, 730
℃、740℃、750℃、760℃、770℃、780℃、790℃、800℃、810℃、820℃、830℃、840℃、850℃、
860, arbitrary in 870 DEG C, 880 DEG C, 890 DEG C, 900 DEG C, 910 DEG C, 920 DEG C, 930 DEG C, 940 DEG C, 950 DEG C and these point values
Arbitrary value in two ranges constituted, can effectively avoid the condensation of exhaust gas region cassiterite.
Further include enhancing draft measure according to the present invention, the enhancing draft measure be control valve 5 and gas-guide tube 9 it
Between be additionally provided with cooling device can make by gas generate the 200-500 DEG C of temperature difference draft booster 11.For example, the temperature difference can
Think 200 DEG C, 210 DEG C, 220 DEG C, 230 DEG C, 240 DEG C, 250 DEG C, 260 DEG C, 270 DEG C, 280 DEG C, 290 DEG C, 300 DEG C, 310 DEG C,
320℃、330℃、340℃、350℃、360℃、370℃、380℃、390℃、400℃、410℃、420℃、430℃、440
DEG C, 450 DEG C, 460 DEG C, 470 DEG C, 480 DEG C, 490 DEG C, in the range that is constituted of any two in 500 DEG C and these point values
Arbitrary value.The temperature difference is bigger, and draft is bigger, to more thoroughly change polluted gas flow direction, effectively avoid polluted gas by
Pollutant is generated when low-temperature region is flowed to high-temperature area and discharged from high-temperature area condenses low defect.Under preferable case,
The cooling device is water cooling equipment.
According to the present invention, the gas flow is adjusted by the aperture or closing cooling device of adjusting control valve 5,
It can effectively avoid crushing.
According to the present invention, the gas flow is the single side 60-200, for example, can be 60 sides, 70 sides, 80 sides, 90
Side, 100 sides, 110 sides, 120 sides, 130 sides, 140 sides, 150 sides, 160 sides, 170 sides, 180 sides, 190 sides, 200 sides and these
Arbitrary value in the range that any two in point value is constituted, total amount are the side 120-400, and air-extraction function is effectively ensured.
According to the present invention, further includes cassiterite cleaning measure, remove cassiterite in molten tin bath in time.Cassiterite cleaning measure be
Exhaust pipe 6 and the lower end of exhaust apparatus 8 are equipped with cassiterite clean-up port 10.
The present invention will be described in detail by way of examples below.
Embodiment 1
A kind of molten tin bath tin pollution object cancellation element is shown in Fig. 2, including air extractor 4, exhaust pipe 6, the row with Insulation
Device of air 8 and gas-guide tube 9, the exhaust pipe 6 are symmetrically connected to the two sides of exhaust apparatus 8, and the symmetrically arranged row
Tracheae 6 is connected by gas-guide tube 9, and the gas-guide tube 9 is connected with air extractor 4, and the exhaust pipe 6 is equipped with control valve 5.
Draft booster 11, the waste gas inlet of the draft booster 11 are additionally provided between control valve 5 and gas-guide tube 9
15 are equipped with flow detector 12, and the waste gas inlet 15 is connected by control valve 5 with exhaust pipe 6, the draft enhancing
The exhaust outlet 16 of device 11 is connected with air extractor 4, water inlet 13 is being equipped with close to 16 position of the exhaust outlet, close to described
15 position of waste gas inlet is equipped with water outlet 14.
Wherein, the exhaust apparatus 8 is internally provided with guiding device 7, and guiding device 7 is arc gas-guide tube, exhaust pipe 6 with
The lower end of exhaust apparatus 8 is additionally provided with cassiterite clean-up port 10, and the exhaust apparatus 8 is the fumer with lagging facility, described to lead
Tracheae 9 is arc gas-guide tube.
Embodiment 2
A kind of application of molten tin bath tin pollution object cancellation element in float glass manufacture, such as Fig. 1, the molten tin bath tin pollution object
Cancellation element 2 is located between chute cover board 1 and zero shellfish sealing 3, the cassiterite clean-up port in the molten tin bath tin pollution object cancellation element 2
10 outside runner glass metal.Experiment prove, after cancellation element of the present invention, tin defects be reduced to 5% hereinafter, molten tin bath substantially not
Cassiterite defect is generated, tail end tin ash amount is also greatly reduced, and the purging work frequency is reduced to original 1/3, effectively solves molten tin bath tin pollution
Problem increases the cleanliness factor and stability of entire molten tin bath room atmosphere, effectively increases the quality of finished glass.If not preceding
End uses cancellation element of the present invention, tin defects to be generally 15% of overall defect or so.
Embodiment 3
A method of using in embodiment 1 molten tin bath tin pollution object cancellation element eliminate molten tin bath tin pollution object, such as Fig. 3,
Under 4 air-extraction function of air extractor, protective gas enters molten tin bath region inner space, keep protective gas and glass metal opposite and
Row, polluted gas control gas in exhaust pipe 6 with exhaust apparatus 8 of the protective gas flow direction with Insulation by control valve 5
Body flow converges, and molten tin bath region is discharged into gas-guide tube 9, and hall space most is discharged through pumping afterwards.Further include enhancing draft measure, institute
State enhancing draft measure be additionally provided between control valve 5 and gas-guide tube 9 with water cooling equipment can make by gas generate 500
The draft booster 11 of DEG C temperature difference.The gas flow is adjusted by the aperture or closing cooling device of adjusting control valve 5
Section, single gas flow is 170 sides, and flow velocity can reach 4.5m/s, further includes cassiterite cleaning measure, the tin at the same time
Stone cleaning measure is to be equipped with cassiterite clean-up port 10 in the lower end of exhaust pipe 6 and exhaust apparatus 8.Experiment proves that protective gas passes through
Molten tin bath region inner space drives polluted gas by increasing draft, improves polluted gas discharge molten tin bath space, polluted gas
The total amount side 1200-2000 accounts for about the 1/6~1/3 of gas gross, the pollution air of the oxide containing tin has been effectively treated, effectively
Reduce the generation of tin defects.
Embodiment 4
According to the method for embodiment 3, the difference is that, do not increase water cooling equipment, is 200 by the discharge tube gas temperature difference
DEG C, density contrast is 1/6 ρ of standard density, is shown by flow monitoring, in the case of control valve standard-sized sheet, single 60 side of flow, and stream
Speed is about 2.8m/s.Experiment proves that protective gas drives polluted gas that molten tin bath space, place is discharged by molten tin bath region inner space
The pollution air for having managed the oxide containing tin, reduces the generation of tin defects.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In the skill of the present invention
In art conception range, technical scheme of the present invention can be carried out a variety of simple variants, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to
Protection scope of the present invention.
Claims (12)
1. a kind of molten tin bath tin pollution object cancellation element, which is characterized in that including air extractor (4), exhaust pipe (6), there is heat preservation
The exhaust apparatus (8) and gas-guide tube (9) of measure, the exhaust pipe (6) are symmetrically connected to the two sides of exhaust apparatus (8), and
The symmetrically arranged exhaust pipe (6) is connected by gas-guide tube (9), and the gas-guide tube (9) is connected with air extractor (4),
The exhaust pipe (6) is equipped with control valve (5).
2. molten tin bath tin pollution object cancellation element according to claim 1, which is characterized in that in control valve (5) and gas-guide tube
(9) draft booster (11) is additionally provided between, the waste gas inlet (15) of the draft booster (11) is equipped with flow detection
Device (12), the waste gas inlet (15) are connected by control valve (5) with exhaust pipe (6), the draft booster (11)
Exhaust outlet (16) is connected with air extractor (4), water inlet (13) is being equipped with close to the exhaust outlet (16) position, close to institute
It states waste gas inlet (15) position and is equipped with water outlet (14).
3. molten tin bath tin pollution object cancellation element according to claim 1, which is characterized in that the exhaust apparatus (8) is internal
Equipped with guiding device (7)；
Preferably, the guiding device (7) is arc gas-guide tube；
Preferably, the exhaust apparatus (8) is fumer.
4. molten tin bath tin pollution object cancellation element according to claim 1, which is characterized in that filled in exhaust pipe (6) and exhaust
The lower end for setting (8) is additionally provided with cassiterite clean-up port (10).
5. the molten tin bath tin pollution object cancellation element according to any one of claim 1-4, which is characterized in that the air guide
It is arc gas-guide tube to manage (9).
6. application of the molten tin bath tin pollution object cancellation element in the gas that decontaminates described in any one of claim 1-5.
7. application according to claim 6, which is characterized in that in float glass manufacture, the molten tin bath tin pollution object disappears
It is optional in the molten tin bath tin pollution object cancellation element (2) except device (2) is located between chute cover board (1) and zero shellfish sealing (3)
Cassiterite clean-up port (10) is outside runner glass metal.
8. a kind of molten tin bath tin pollution object cancellation element using described in any one of claim 1-5 eliminates molten tin bath tin pollution object
Method, which is characterized in that under air extractor (4) air-extraction function, protective gas enters molten tin bath region inner space, makes protection
Gas goes in the same direction with glass metal, and polluted gas passes through control with exhaust apparatus (8) of the protective gas flow direction with Insulation
Gas flow converges in valve (5) control exhaust pipe (6) processed, and molten tin bath region is discharged into gas-guide tube (9).
9. according to the method described in claim 8, it is characterized in that, the holding temperature is 700-950 DEG C.
10. according to the method described in claim 8, it is characterized in that, further including enhancing draft measure, the enhancing draft measure
Be be additionally provided between control valve (5) and gas-guide tube (9) with cooling device can make by gas generate the 200-500 DEG C of temperature difference
Draft booster (11)；
Preferably, the cooling device is water cooling equipment.
11. the method according to claim 8 or 10, which is characterized in that the gas flow is by adjusting control valve (5)
Aperture or close cooling device be adjusted；
Preferably, the gas flow is the single side 60-200, and total amount is the side 120-400.
12. according to the method described in claim 8, it is characterized in that, further including cassiterite cleaning measure, the cassiterite clears up measure
It is to be equipped with cassiterite clean-up port (10) in the lower end of exhaust pipe (6) and exhaust apparatus (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019570.3A CN108455826B (en) | 2018-01-09 | 2018-01-09 | Tin pollutant eliminating device and method for tin bath and application of tin pollutant eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019570.3A CN108455826B (en) | 2018-01-09 | 2018-01-09 | Tin pollutant eliminating device and method for tin bath and application of tin pollutant eliminating device |
Publications (2)
| Publication Number | Publication Date |
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| CN108455826A true CN108455826A (en) | 2018-08-28 |
| CN108455826B CN108455826B (en) | 2021-09-24 |
Family
ID=63221389
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810019570.3A Active CN108455826B (en) | 2018-01-09 | 2018-01-09 | Tin pollutant eliminating device and method for tin bath and application of tin pollutant eliminating device |
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| CN109368994A (en) * | 2018-11-27 | 2019-02-22 | 中国洛阳浮法玻璃集团有限责任公司 | A kind of adsorbent equipment with reduction float glass plate face tin defects |
| CN115321795A (en) * | 2022-08-30 | 2022-11-11 | 洛玻集团洛阳龙海电子玻璃有限公司 | Self-cleaning endoscope head structure for electronic glass tin bath |
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| CN108455826B (en) | 2021-09-24 |
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