CN104797538A - Plate glass production method and plate glass production device - Google Patents
Plate glass production method and plate glass production device Download PDFInfo
- Publication number
- CN104797538A CN104797538A CN201380060635.4A CN201380060635A CN104797538A CN 104797538 A CN104797538 A CN 104797538A CN 201380060635 A CN201380060635 A CN 201380060635A CN 104797538 A CN104797538 A CN 104797538A
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- China
- Prior art keywords
- brick
- rare gas
- heating element
- runner exit
- sheet glass
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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
- C03B18/16—Construction of the float tank; Use of material for the float tank; Coating or protection of the tank wall
-
- 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
- C03B18/20—Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
- C03B5/265—Overflows; Lips; Tweels
- C03B5/267—Overflows; Lips; Tweels specially adapted for supplying the float tank
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
A plate glass production method that continuously supplies molten glass from a spout lip on to molten tin inside a float bath, and causes the molten glass that has been caused to be in contact with a tile to flow on to the molten tin, said tile provided below the spout lip with a space therebetween. The plate glass production method: heats the tile, using a heat-generating body provided between the spout lip and the tile and provided further on the upstream side than the tile surface in contact with the molten glass; and blows an inert gas into the gap between the spout lip and the tile.
Description
Technical field
The present invention relates to the manufacture method of sheet glass and the manufacturing installation of sheet glass.
Background technology
Melten glass is supplied in the molten tin in float tank by the manufacturing installation of sheet glass continuously, makes its downstream flow and form the glass ribbon of band plate-like.Space in float tank is divided into the principal space in downstream side and runner exit (spout) space of upstream side by spaced walls (front lintel (front lintel)).The principal space is larger fully than runner exit space, and in order to prevent the oxidation of molten tin to be full of by reducing gas.
The manufacturing installation of this sheet glass is runner exit labial lamina by being configured in runner exit space and is supplied to by melten glass in the molten tin in float tank.Be supplied to melten glass in molten tin formed downstream flowing main flow (front stream (front flow)) and towards the tributary (backflow (back flow)) of brick adverse current of below being arranged at runner exit labial lamina in the mode vacating interval.By being embedded in the heating element of the inside of brick, by the melten glass heating (such as with reference to patent documentation 1) in molten tin.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2007-131525 publication
Summary of the invention
Invent problem to be solved
If heating element is embedded in the inside of brick, then when brick is melted glass or molten tin corrodes, the composition of heating element is in middle strippings such as melten glass sometimes.And, if heating element is embedded in the inside of brick, be then difficult to only change heating element.
Therefore, consider the outer setting heating element at brick, but in this case, the surface of heating element can be attached to from the composition etc. of melten glass evaporation.If this dirt settling falls within the melten glass place in molten tin, then become breaking or the reason of defect of glass.In addition, when heating element being arranged on the outside of brick, heating element and periphery atmosphere react and deterioration gradually.
The present invention completes in view of above-mentioned problem, its object is to provide a kind of dirt settling of heating element that can suppress to fall within melten glass place in molten tin, and can suppress the manufacture method of the sheet glass of the deterioration of heating element and the manufacturing installation of sheet glass.
For solving the technique means of problem
In order to solve above-mentioned problem, according to the manufacture method of the sheet glass of the present invention's mode, melten glass is supplied to continuously the molten tin in float tank from runner exit labial lamina, and the melten glass that the brick making and be arranged in the mode vacating interval the below of described runner exit labial lamina contacts flows in described molten tin, wherein
Use heating element to heat described brick, this heating element is arranged between described runner exit labial lamina and described brick, and be arranged at than described brick with the more upstream side of the contact surface of melten glass,
And, be blown into rare gas element to the clearance space between described runner exit labial lamina and described brick.
In addition, according to the manufacturing installation of the sheet glass of another way of the present invention, it comprises:
Runner exit labial lamina, melten glass is supplied in the molten tin in float tank by continuously;
Brick, it is arranged at the below of this runner exit labial lamina in the mode vacating interval, and contacts with the melten glass supplied from described runner exit labial lamina;
Heating element, it is arranged between described runner exit labial lamina and described brick, and be arranged at than described brick with the contact surface more upstream side of melten glass; And
Rare gas element supply unit, it is blown into rare gas element to the clearance space between described runner exit labial lamina and described brick.
Invention effect
According to a mode of the present invention, provide a kind of dirt settling of heating element that can suppress to fall within melten glass place in molten tin, and the manufacture method of the sheet glass of the deterioration of heating element and the manufacturing installation of sheet glass can be suppressed.
Accompanying drawing explanation
Fig. 1 is the sectional view of the major portion of the manufacturing installation of sheet glass in expression the 1st embodiment.
Fig. 2 is the vertical view of the flowing of the melten glass schematically shown in the molten tin of Fig. 1.
Fig. 3 is the sectional view of the major portion of the manufacturing installation of sheet glass in expression the 2nd embodiment.
Embodiment
Below, be described for implementing mode of the present invention with reference to accompanying drawing.It should be noted that, in the drawings and in which, also the description thereof will be omitted to give identical or corresponding symbol for identical or corresponding formation.In the drawings and in which, arrow A direction represents downstream direction, and arrow B direction represents updrift side.
(the 1st embodiment)
Fig. 1 is the sectional view of the major portion of the manufacturing installation of sheet glass in expression the 1st embodiment.Fig. 2 is the vertical view of the flowing of the melten glass schematically shown in the molten tin of Fig. 1.
As shown in Figure 1, melten glass 30 is supplied in the molten tin 20 in float tank 10 by the manufacturing installation of sheet glass continuously, and the melten glass 30 of supply is flowed in molten tin 20 form the glass ribbon 30A that shape is band plate-like.Glass ribbon 30A after shaping is mentioned by from molten tin 20 in the downstream area of float tank 10, and is transported in Slow cooling stove, is cut to specific size, and becomes sheet glass after Slow cooling.
Space 11 in float tank 10 is divided into the principal space 111 in downstream side and the runner exit space 112 of upstream side by spaced walls (front lintel) 17.The principal space 111 is larger fully than runner exit space 112.
In the principal space 111, in order to prevent the oxidation of molten tin 20, supply reducing gas.Reducing gas such as can be the mixed gas of nitrogen and hydrogen, and comprises the nitrogen of 85 volume % ~ 98.5 volume %, the hydrogen of 1.5 volume % ~ 15 volume %.
The principal space 111 is supplied to the reducing gas supply unit 60 of reducing gas, be made up of the hole etc. on the top board 12 being arranged on the end face forming the principal space 111.
The manufacturing installation of sheet glass comprises: runner exit labial lamina 14, and melten glass 30 is supplied in the molten tin 20 in float tank 10 by continuously; And brick 15, it is arranged at the below of runner exit labial lamina 14 in the mode vacating interval, and contacts with the melten glass 30 supplied from runner exit labial lamina 14.Runner exit labial lamina 14, brick 15 are arranged at antetheca 13 place of float tank 10.Runner exit labial lamina 14 and brick 15 are made up of the refractory body of aluminum oxide, zirconium oxide etc.
Runner exit labial lamina 14, brick 15 and the sidewall 16 that extends obliquely from brick 15 are preferably by % by weight ZrO
2be more than 85% and less than 97%, remainder is with SiO
2for vitreous fusible refractory thing of main body is formed.Fusible refractory thing is make the at high temperature melting of the raw material of refractory body and the refractory body that formed of recrystallize.Fusible refractory thing ZrO
2for existing mainly as baddeleyite crystal.The remainder of fusible refractory thing is with SiO
2for the glassiness of main body, and be present in ZrO
2the crystal boundary of baddeleyite crystal, by the densification of fusible refractory thing.Except SiO in this glassiness
2in addition, also can containing micro-Al
2o
3, Na
2o, P
2o
5deng.The excellent heat resistance of this fusible refractory thing, and can suppress to produce because of reaction with melten glass 30 etc. to steep, in addition, the fine streaks produced on the flow direction of glass ribbon 30A also can be suppressed.More effective when melten glass is non-alkali glass, the non-alkali glass particularly containing boric acid.
As the object lesson of non-alkali glass, the non-alkali glass containing following composition can be enumerated: represent with the quality percentage of oxide compound benchmark,
SiO
2：50％～73％
Al
2O
3：10.5％～24％
B
2O
3：0％～12％
MgO：0％～8％
CaO：0％～14.5％
SrO：0％～24％
BaO：0％～13.5％
MgO+CaO+SrO+BaO：8％～29.5％
ZrO
2：0％～5％。
When strain point high and consider meltability, preferably can enumerate the non-alkali glass containing following composition: represent with the quality percentage of oxide compound benchmark,
SiO
2：58％～66％
Al
2O
3：15％～22％
B
2O
3：5％～12％
MgO：0％～8％
CaO：0％～9％
SrO：3％～12.5％
BaO：0％～2％
MgO+CaO+SrO+BaO：9％～18％。
Particularly when considering high strain-point, preferably can enumerate the non-alkali glass containing following composition: represent with the quality percentage of oxide compound benchmark,
SiO
2：54％～73％
Al
2O
3：10.5％～22.5％
B
2O
3：0％～5.5％
MgO：0％～8％
CaO：0％～9％
SrO：0％～16％
BaO：0％～2.5％
MgO+CaO+SrO+BaO：8％～26％。
It should be noted that, in the present embodiment, the sidewall 16 in runner exit labial lamina 14, brick 15, left side and the sidewall 16 on right side are all made up of above-mentioned fusible refractory thing, but may not be and be all made up of above-mentioned fusible refractory thing.As long as at least one is made up of above-mentioned fusible refractory thing, then can obtain above-mentioned effect to a certain extent.
The left and right sides of the melten glass 30 that can flow on runner exit labial lamina 14, arranges the cross wall for preventing melten glass 30 from overflowing to the left and right from runner exit labial lamina 14.When being provided with this cross wall, comprising this cross wall and being called runner exit labial lamina 14 interior.
Being supplied to the melten glass 30 molten tin 20 from runner exit labial lamina 14, carrying out Flow-rate adjustment for controlling flashboard 19 by runner.As shown in Figure 2, the melten glass 30 be supplied to molten tin 20 from the leading section 142 of runner exit labial lamina 14 forms the main flow (front stream) 31 of downstream flowing and the tributary (backflow) 32 towards brick 15 upstream direction adverse current.
Tributary 32 comprises the part contacted with runner exit labial lamina 14, therefore, comprises the bubble produced because of the reaction with runner exit labial lamina 14., after brick 15 adverse current, divide right and left along brick 15 and flow in this tributary 32.Flowing along the sidewall 16 extended obliquely from brick 15 respectively in the tributary 32 of dividing right and left, and converges in the width end of main flow 31.Therefore, bubble can be concentrated on the width end of glass ribbon 30A, thus the few goods of defect can be cut out from the width central part of glass ribbon 30A.
Sidewall 16 extends from brick 15 obliquely in the mode making the tributary 32 of dividing right and left and be easy to respectively converge in the width end of main flow 31.Sidewall 16 is more to enter to downstream skidding, more extends obliquely towards the mode outside width.
As shown in Figure 1, the manufacturing installation of sheet glass in order to improve the mobility in the tributary 32 of upstream direction adverse current and make the flowing stabilization in tributary 32, and has the heating element 40 heated brick 15.Heating element 40 is arranged between runner exit labial lamina 14 and brick 15, and the melten glass 30 while of by heating brick 15 on heating and melting tin 20.
Heating element 40 can with the melten glass 30 of heating temperatures brick 15 periphery of higher than the devitrification temperature of glass 10 DEG C ~ 50 DEG C.The devitrification of the glass at brick 15 periphery place can be prevented.
Heating element 40 is arranged between runner exit labial lamina 14 and brick 15, and is arranged on the outside of brick 15.Therefore, when brick 15 is melted glass 30 or molten tin 20 corrodes, the composition of the dirt settling of heating element 40 or heating element 40 can not stripping in melten glass 30 or molten tin 20.In addition, heating element 40 can only be changed.
Heating element 40 be arranged on than brick 15 with the contact surface 152 more upstream side of melten glass 30.That is, heating element 40 is arranged on position not overlapping with the melten glass 30 in molten tin 20 when overlooking.Therefore, the dirt settling of heating element 40 not easily falls within melten glass 30 place in molten tin 20, and thus glass not easily produces and breaks or defect.It should be noted that, heating element 40 be may correspond to the erosion in brick 15 and is moved by suitable drive unit or manual mode.
Heating element 40 is formed by the material of the excellent corrosion resistance for reducing gas.As the material of heating element 40, be not particularly limited, such as, have matrix material, the silicon nitride (Si of silicon carbide (SiC), silicon carbide (SiC) and Pure Silicon Metal (Si)
3n
4) etc.Heating element 40 also can for the heating element formed by stupalith coverings such as aluminum oxide.
Heating element 40 can be bar-shaped, and arranging abreast with the contact surface 152 of melten glass 30 relative to brick 15.Tributary 32 is easy to flow to the left and right along brick 15.
Heating element 40 can be positioned at the inner side of the outer rim 154 (with reference to Fig. 2) of brick 15 when overlooking, and comparable brick 15 is short.The heating efficiency of brick 15 is good.
The open porosity (JIS (Japanese Industrial Standards) R 1634) of heating element 40 is preferably less than 15%, is more preferably less than 10%.If open porosity is more than 15%, then the surface-area being exposed to the heating element 40 of periphery atmosphere is excessive, and heating element 40 is easy to deterioration.
Heating element 40 is preferably drum, and has the external diameter of 20mm ~ 40mm.If be square column shape, be then easy to local pyrexia, be easy to deterioration.In addition, if be solid and non-hollow, then the raw materials cost of heating element 40 increases.Further, if external diameter is greater than 40mm, then required large installation space.On the other hand, if external diameter is less than 20mm, then, when the thermal value of heating element 40 is identical, the hull-skin temperature of heating element 40 is too high, and heating element 40 is easy to deterioration.
The manufacturing installation of sheet glass also has the 1st rare gas element supply unit 50 being blown into rare gas element to the clearance space 113 between runner exit labial lamina 14 and brick 15.As the rare gas element being blown into clearance space 113, nitrogen, argon gas etc. can be used.By being blown into rare gas element to clearance space 113, the periphery atmosphere inerting of heating element 40 can being made, the deterioration of heating element 40 can be suppressed.In addition, by being blown into rare gas element to clearance space 113, the concentration of the hydrogen chloride gas in the periphery atmosphere of heating element 40 can being made to reduce, thus the deterioration because of the heating element 40 caused by hydrogen chloride gas can be suppressed.
It should be noted that, hydrogen chloride gas is that the chlorine evaporated from melten glass 30 reacts with the hydrogen being supplied to the principal space 111 and generates.The reason that chlorine evaporates from melten glass 30 is: there is muriate and be included in situation frit as inevitable impurity.
It is below 150ppm that concentration apart from the hydrogen chloride gas in the atmosphere of the position of the outside surface 10mm of heating element 40 is preferably with volume basis.If the concentration of hydrogen chloride gas is with volume basis more than 150ppm, then heating element 40 is easy to deterioration.
1st rare gas element supply unit 50 can be blown into rare gas element continuously to clearance space 113.Every 1m length that its amount of being blown into is preferably for bar-shaped heating element 40 is 2Nl (litre)/min ~ 15Nl/min.If the amount of being blown into of rare gas element is too much, then the melten glass 30 in molten tin 20 is cooled, and can undermine the mobility in tributary 32.On the other hand, if the amount of being blown into of rare gas element is very few, then cannot obtain the effect of the periphery atmosphere inerting making heating element 40 fully.
It should be noted that, the 1st rare gas element supply unit 50 of present embodiment is blown into rare gas element continuously to clearance space 113, but also can be blown into discontinuously.
1st rare gas element supply unit 50 can be made up of the rare gas element supply-pipe etc. of the gas be exposed at least partially in float tank 10.Utilize the warm rare gas element supply-pipe 50 of the high-temperature gas in float tank 10, preheating is carried out to the rare gas element of the internal flow at rare gas element supply-pipe 50.Because the rare gas element after preheating is blown into clearance space 113, so the temperature variation of clearance space 113 is little, thus the temperature variation of melten glass 30 is little.
It should be noted that, also the rare gas element being warmed to specified temp in advance can be directed into rare gas element supply-pipe 50.
Rare gas element supply-pipe 50 is made up of the material of the excellent corrosion resistance for reducing gas, such as, be made up of stupaliths such as aluminum oxide.
Rare gas element supply-pipe 50 is arranged on than runner exit labial lamina 14 more below and than the position of brick 15 more top.Rare gas element supply-pipe 50 can be arranged on than brick 15 with the contact surface 152 more upstream side of melten glass 30.That is, rare gas element supply-pipe 50 can be arranged on position not overlapping with the melten glass 30 in molten tin 20 when overlooking.When 50 breakage of rare gas element supply-pipe, damaged thing not easily falls within melten glass 30 place, and thus glass not easily produces and breaks or defect.It should be noted that, rare gas element supply-pipe 50 can be corresponded to the erosion of brick 15 and be moved by suitable drive unit or manual mode.
Rare gas element supply-pipe 50 such as can be blown into rare gas element mode from the both sides of clearance space 113 is provided with multiple (such as 1 to).The blow-off outlet 54 being arranged on the front end of rare gas element supply-pipe 50 can be arranged on outside clearance space 113, and utilizes blast to be blown into rare gas element to clearance space 113.
It should be noted that, the blow-off outlet 54 of present embodiment is arranged on outside clearance space 113, but also can be arranged in clearance space 113.In addition, the blow-off outlet 54 of present embodiment is arranged on the front end of rare gas element supply-pipe 50, but also can be arranged on midway.
The blow-off outlet 54 of rare gas element supply-pipe 50 can be arranged on the position than heating element 40 more top.Its reason is: the rare gas element blown out from blow-off outlet 54, because of heavy than the gas cold of clearance space 113, therefore after blowing out from blow-off outlet 54, forms top-down flowing.
In addition, the manufacturing installation of sheet glass also has the 2nd rare gas element supply unit 70 supplying rare gas element than the superjacent air space 114 of runner exit labial lamina 14 more top in runner exit space 112.Supply to the rare gas element of superjacent air space 114, nitrogen, argon gas etc. can be used.The density of hydrogen in superjacent air space 114 can be reduced, when runner controls flashboard 19 or runner exit labial lamina 14 is covered by platinum or platinum alloy, tectum deterioration because of hydrogen can be suppressed.
2nd rare gas element supply unit 70 can be blown into rare gas element in space 114 upward continuously, also can be blown into discontinuously.
2nd rare gas element supply unit 70 can be made up of the rare gas element supply-pipe etc. of the gas be exposed at least partially in float tank 10 in the same manner as the 1st rare gas element supply unit 50.Utilize the warm rare gas element supply-pipe of the high-temperature gas in float tank 10, preheating is carried out to the rare gas element of the internal flow at rare gas element supply-pipe.Because the rare gas element after preheating is blown into supreme side space 114, the temperature variation of superjacent air space 114 is little, and the temperature variation of melten glass 30 is little.
(the 2nd embodiment)
Present embodiment is the change case about the 1st rare gas element supply unit clearance space 113 being supplied to rare gas element.
Fig. 3 is the sectional view of the major portion of sheet glass manufacturing apparatus in expression the 2nd embodiment.As shown in Figure 3, the 1st rare gas element supply unit 50A by being blown into rare gas element to clearance space 113, and forms inert gas flow near heating element 40.Therefore, the not accessible heating element 40 of reducing gas or hydrogen chloride gas, thus the deterioration of heating element 40 can be suppressed.In addition, from the not accessible heating element 40 of composition that melten glass 30 evaporates, thus the generation of the dirt settling of heating element 40 can be suppressed.
The inert gas flow formed near heating element 40 is expected for from heating element 40 flowing downward.Its reason is: if form the flowing of spontaneous hot body 40 towards the melten glass 30 in molten tin 20, then because forming the gas cold of rare gas element than periphery of this flowing, so can damage the mobility in tributary 32.In addition, its reason is: if form the flowing of spontaneous hot body 40 towards the melten glass 30 in molten tin 20, then the dirt settling of heating element 40 can be carried to the melten glass 30 in molten tin 20.
1st rare gas element supply unit 50A can be made up of the rare gas element supply-pipe etc. of the gas be exposed at least partially in float tank 10.Rare gas element supply-pipe 50A can correspond to heating element 40 with brick 15 erosion caused by movement and moved by suitable drive unit or manual mode.
In the present embodiment, different from above-mentioned 1st embodiment, the blow-off outlet 54A of rare gas element supply-pipe 50A is arranged in clearance space 113.Such as, as shown in Figure 3, blow-off outlet 54A is positioned at the oblique upper of heating element 40, and blows out rare gas element towards the top of heating element 40.The rare gas element that blows out from blow-off outlet 54A, because of heavier than the gas cold in clearance space 113, so after blowing out from blow-off outlet 54A, forms top-down flowing.Thus inert gas flow is formed near heating element 40.
It should be noted that, in the present embodiment, blow-off outlet 54A is positioned at the oblique upper of heating element 40, but the present invention is not limited thereto.Such as, blow-off outlet 54A also can be positioned at the top of heating element 40, and blows out rare gas element towards heating element 40.
Blow-off outlet 54A both can be single, also can be multiple.Multiple blow-off outlet 54A can be arranged at equal intervals along the direction of principal axis of rare gas element supply-pipe 50A, also can non-uniform distantance arrangement.In a word, as long as inert gas flow can be formed in the region that the concentration of the hydrogen of heating element 40 periphery or hydrogen chloride gas is high.
It should be noted that, the 1st rare gas element supply unit 50A in present embodiment can replace the 1st rare gas element supply unit 50 in the 1st embodiment to use.
Embodiment
(embodiment 1)
In embodiment 1, the manufacturing installation of the sheet glass shown in Fig. 1 is used to manufacture non-alkali glass plate.For the rare gas element of the clearance space be blown between runner exit labial lamina and brick, use nitrogen.The amount of being blown into of this nitrogen is set as that every 1m length of the heating element for drum is 6Nl/min.For the material of heating element, use silicon carbide.
It should be noted that, runner exit labial lamina, brick and the sidewall of left and right that extends obliquely from brick by containing 94 % by weight ZrO
2, 4 % by weight SiO
2, 1 % by weight Al
2o
3, 0.3 % by weight Na
2the fusible refractory thing of O is formed.
Consequently, in embodiment 1, can heating element do not changed and manufacture non-alkali glass plate continuously for 6 weeks.Concentration apart from the hydrogen chloride gas in the atmosphere of the downwardly square 10mm position of the long side direction central authorities of heating element is by hydrogenchloride detector tube (bright Physicochemical industry society system, pipe numbering (Tube No.) 173SA (20-1200ppm)) and measure, result take volume basis as 150ppm.
(comparative example 1)
In comparative example 1, be not blown into rare gas element to the clearance space between runner exit labial lamina and brick, in addition, manufacture non-alkali glass plate in the same manner as example 1.
Consequently, in comparative example 1, the new heating element 2 weeks just abnormal heating because of porous, thus must change heating element.Concentration apart from the hydrogen chloride gas in the atmosphere of the downwardly square 10mm position of the long side direction central authorities of heating element take volume basis as 500ppm.
Above, the embodiment etc. of the manufacturing installation of sheet glass and the manufacture method of sheet glass is illustrated, but the present invention is not limited to above-mentioned embodiment etc., various distortion, improvement can be carried out in the scope of the purport of the present invention described in claim.
This application claims the right of priority of No. 2012-270385, the Japanese patent application proposed to Japan Office based on December 11st, 2012, and the full content of No. 2012-270385, Japanese patent application is referenced in the application.
Nomenclature
10 float tanks
Space in 11 float tanks
111 principal spaces
112 runner exit spaces
113 clearance spaces
114 superjacent air spaces
14 runner exit labial laminas
15 bricks
152 bricks with the contact surface of melten glass
The outer rim of 154 bricks
16 sidewalls extended obliquely from brick
17 spaced walls (front lintel)
20 molten tin
30 melten glass
30A glass ribbon
40 heating elements
50 the 1st rare gas element supply units
54 blow-off outlets
60 reducing gas supply units
70 the 2nd rare gas element supply units
Claims (18)
1. the manufacture method of a sheet glass, melten glass is supplied to continuously the molten tin in float tank from runner exit labial lamina, and the melten glass that the brick making and be arranged in the mode vacating interval the below of described runner exit labial lamina contacts flows in described molten tin, wherein
Use heating element to heat described brick, this heating element is arranged between described runner exit labial lamina and described brick, and be arranged at than described brick with the more upstream side of the contact surface of melten glass,
Further, rare gas element is blown into the clearance space between described runner exit labial lamina and described brick.
2. the manufacture method of sheet glass according to claim 1, wherein,
Be blown into described rare gas element to described clearance space, near described heating element, form described inert gas flow.
3. the manufacture method of sheet glass according to claim 1 and 2, wherein,
The gas be exposed at least partially in described float tank of the rare gas element supply-pipe of described rare gas element is blown into described clearance space.
4. the manufacture method of the sheet glass according to any one of claims 1 to 3, wherein,
Described rare gas element is 2Nl/min ~ 15Nl/min to the amount of being blown into of described clearance space for every 1m length of bar-shaped described heating element.
5. the manufacture method of the sheet glass according to any one of Claims 1 to 4, wherein,
The open porosity of described heating element is less than 15%.
6. the manufacture method of the sheet glass according to any one of Claims 1 to 5, wherein,
Described heating element is bar-shaped, and arranging abreast with the contact surface of melten glass relative to described brick, and the inner side of the outer rim of described brick is positioned at when overlooking.
7. the manufacture method of the sheet glass according to any one of claim 1 ~ 6, wherein,
Described heating element is drum, and has the external diameter of 20mm ~ 40mm.
8. the manufacture method of the sheet glass according to any one of claim 1 ~ 7, wherein,
Space in described float tank is divided into the runner exit space of the upstream side being provided with described runner exit labial lamina and the principal space in downstream side by spaced walls,
To described principal space supply reducing gas, and, to the superjacent air space supply rare gas element of runner exit labial lamina more top described in the ratio in described runner exit space.
9. the manufacture method of the sheet glass according to any one of claim 1 ~ 8, wherein,
At least one in the sidewall extended obliquely from described brick, described runner exit labial lamina and described brick, by % by weight ZrO
2be more than 85% and less than 97%, remainder is for SiO
2for vitreous fusible refractory thing of main body is formed.
10. a manufacturing installation for sheet glass, has:
Runner exit labial lamina, melten glass is supplied in the molten tin in float tank by continuously;
Brick, it is arranged at the below of this runner exit labial lamina in the mode vacating interval, and contacts with the melten glass supplied from described runner exit labial lamina;
Heating element, it is arranged between described runner exit labial lamina and described brick, and be arranged at than described brick with the more upstream side of the contact surface of melten glass; And
1st rare gas element supply unit, it is blown into rare gas element to the clearance space between described runner exit labial lamina and described brick.
The manufacturing installation of 11. sheet glass according to claim 10, wherein,
Described 1st rare gas element supply unit is blown into described rare gas element to described clearance space, near described heating element, form described inert gas flow.
The manufacturing installation of 12. sheet glass according to claim 10 or 11, wherein,
Described 1st rare gas element supply unit comprises the rare gas element supply-pipe of the gas be exposed at least partially in described float tank.
The manufacturing installation of 13. sheet glass according to any one of claim 10 ~ 12, wherein,
Described rare gas element is 2Nl/min ~ 15Nl/min to the amount of being blown into of described clearance space for every 1m length of bar-shaped described heating element.
The manufacturing installation of 14. sheet glass according to any one of claim 10 ~ 13, wherein,
The open porosity of described heating element is less than 15%.
The manufacturing installation of 15. sheet glass according to any one of claim 10 ~ 14, wherein,
Described heating element is bar-shaped, and arranging abreast with the contact surface of melten glass relative to described brick, and the inner side of the outer rim of described brick is positioned at when overlooking.
The manufacturing installation of 16. sheet glass according to any one of claim 10 ~ 15, wherein,
Described heating element is drum, and has the external diameter of 20mm ~ 40mm.
The manufacturing installation of 17. sheet glass according to any one of claim 10 ~ 16, has:
Spaced walls, the space in described float tank is divided into the principal space in downstream side and the runner exit space of upstream side by it;
Reducing gas supply unit, it is to described principal space supply reducing gas; And
2nd rare gas element supply unit, its superjacent air space to runner exit labial lamina more top described in the ratio in described runner exit space supply rare gas element.
The manufacturing installation of 18. sheet glass according to any one of claim 10 ~ 17, wherein,
At least one from sidewall, described runner exit labial lamina and described brick that described brick extends obliquely, by % by weight ZrO
2be more than 85% and less than 97%, remainder is for SiO
2for vitreous fusible refractory thing of main body is formed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012270385A JP2016028986A (en) | 2012-12-11 | 2012-12-11 | Method for producing plate glass, and apparatus for producing plate glass |
| JP2012-270385 | 2012-12-11 | ||
| PCT/JP2013/077126 WO2014091814A1 (en) | 2012-12-11 | 2013-10-04 | Plate glass production method and plate glass production device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104797538A true CN104797538A (en) | 2015-07-22 |
| CN104797538B CN104797538B (en) | 2016-11-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108238710A (en) * | 2018-03-09 | 2018-07-03 | 汪立新 | Glass tape polishes manufacturing process and glass substrate production method and production equipment |
| CN110451779A (en) * | 2019-07-19 | 2019-11-15 | 四川旭虹光电科技有限公司 | Glass tin tank heating structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3508902A (en) * | 1966-06-17 | 1970-04-28 | Ppg Industries Inc | Wetback heating apparatus |
| JPH0561992U (en) * | 1991-11-27 | 1993-08-13 | セントラル硝子株式会社 | Electric heater |
| CN1446764A (en) * | 2002-03-06 | 2003-10-08 | 舱壁玻璃公司 | Appts. for conveying glass melt via overflow brick (outlet end) when producing float glass |
| CN1962499A (en) * | 2005-11-10 | 2007-05-16 | 肖特股份有限公司 | Process for producing flat glass, particularly flat glass convertible to float glass |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3508902A (en) * | 1966-06-17 | 1970-04-28 | Ppg Industries Inc | Wetback heating apparatus |
| JPH0561992U (en) * | 1991-11-27 | 1993-08-13 | セントラル硝子株式会社 | Electric heater |
| CN1446764A (en) * | 2002-03-06 | 2003-10-08 | 舱壁玻璃公司 | Appts. for conveying glass melt via overflow brick (outlet end) when producing float glass |
| CN1962499A (en) * | 2005-11-10 | 2007-05-16 | 肖特股份有限公司 | Process for producing flat glass, particularly flat glass convertible to float glass |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108238710A (en) * | 2018-03-09 | 2018-07-03 | 汪立新 | Glass tape polishes manufacturing process and glass substrate production method and production equipment |
| CN110451779A (en) * | 2019-07-19 | 2019-11-15 | 四川旭虹光电科技有限公司 | Glass tin tank heating structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016028986A (en) | 2016-03-03 |
| KR20150095616A (en) | 2015-08-21 |
| WO2014091814A1 (en) | 2014-06-19 |
| TW201425241A (en) | 2014-07-01 |
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