CN104108859A - Production method of float glass - Google Patents
Production method of float glass Download PDFInfo
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- CN104108859A CN104108859A CN201410146141.4A CN201410146141A CN104108859A CN 104108859 A CN104108859 A CN 104108859A CN 201410146141 A CN201410146141 A CN 201410146141A CN 104108859 A CN104108859 A CN 104108859A
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Abstract
The invention provides a production method of float glass. The method comprises the following steps: melting glass to obtain molten glass; adding a tin bath additive to molten tin at a tin bath constriction section at 650-750 DEG C; adding the molten glass to the tin bath to obtain a glass tape; and annealing the glass tape to obtain the float glass, wherein the tin bath additive is an iron-tin monotectic or hypomonotectic alloy with the mass percentage content of tin of 18-48.8% and the melting point of 1130-1400DEG C. The melting point of tin is lower than that of iron, the addition of a proper amount of tin makes the tin bath additive have a low melting point, and the temperature of the molten tin does not violently decrease when the tin bath additive is added to the molten tin in the tin bath, so bubbles are avoided. A ratio of tin to iron is proper, so after the tin bath additive is added to the molten tin, local enrichment of iron is unlikely, and bubbles can also be avoided. The use of the tin bath additive in the invention is helpful to obtain the high-quality float glass with few bubbles and small tin permeability.
Description
Technical field
The present invention relates to float glass field, particularly a kind of production method of float glass.
Background technology
The production technique of float glass is: melten glass liquid is continuously flowed into and swum in from tank furnace on the tin liquor surface that relative density is larger, under gravity and capillary effect, glass metal spreads out, shakeouts, forms the glass ribbon that upper and lower surface is smooth, harden on tin liquor face, glass ribbon is pulled out to molten tin bath through annealing, cutting, obtain float glass product.
In described float glass process, molten tin bath is the container of storage tin liquor, and its effect is the glass metal having melted at a certain temperature, forms the glass of certain thickness and width by External Force Acting.
Because the tin liquor in molten tin bath is subject to after dioxygen oxidation, the tin protoxide generating is just easily penetrated into lower glass surface, form the very thin stannize layer of one deck, due to the existence of this layer of stannize layer, float glass is in the time carrying out the hot-work such as tempering or hot bending, tin protoxide absorbs oxygen and is further oxidized to tindioxide, volumetric expansion makes glass surface form micro-wrinkle, because micro-wrinkle produces and interferes light, reflex time presents blueness, when serious, even make glass surface coarse scared and opaque, form float glass trising from tempering float glass.Stannize amount and the stannize degree of depth of the formation of trising from tempering float glass and severity thereof and glass surface have direct relation.There are some researches show, the diffusion depth of float glass lower surface tin can reach 12～36 μ m, and along with the degree of depth increases, stannize amount diminishes gradually.
Avoid occurring rainbow after glass heat processing, the main method adopting is at present ensure the purity of shielding gas supply and strengthen tin groove sealing, accomplishes that tin bath outlet end liquid level does not have oxide compound scum silica frost.There is patent report abroad, contact with shielding gas with tin liquor with graphite or agraphitic carbon, can make shielding gas keep reduced state, thereby reduce to greatest extent the oxide content of tin in tin liquor, can prevent that tin is oxidized, the protective value of recovery and protection gas.
Also in another technique of development, to avoid rainbow to occur, in molten tin bath, add iron, thereby effectively prevent the stannize amount of the contact surface of glass and tin liquor at present.Wherein, the iron of use must be pure iron, pure iron fusing heat absorption, cause tin liquor cooling too fast, iron also can be brought micro-ferric oxide impurity into, and iron directly adds in molten tin bath and also can cause portion of Railway Bureau excessive concentration, and the existence of these factors causes float glass easily to produce bubble.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of production method of float glass, is difficult for producing bubble.
The production method that the invention discloses a kind of float glass, comprises the following steps: glass is carried out to melting, obtain glass metal; In the time of 650～750 DEG C of molten tin bath contraction sections, molten tin bath additive is joined in tin liquor; Make described glass metal enter molten tin bath, obtain glass ribbon; By described glass ribbon annealing, obtain float glass, iron tin monotectic or hypomonotectic alloy that the quality percentage composition that described molten tin bath additive is tin is 18～48.8%, fusing point is 1130～1400 DEG C.
Preferably, in described molten tin bath interpolation, the quality percentage composition of tin is 25～38%.
Preferably, the preparation method of described molten tin bath additive, comprises the following steps:
The iron of the tin of 18～48.8wt% and 51.2～82wt% is mixed, and vacuum arc melting, obtains the uniform mother alloy of composition;
Described mother alloy is carried out to granulation, and the quality percentage composition that obtains tin is 18～48.8%, and fusing point is the molten tin bath additive of 1130～1400 DEG C.
Preferably, described vacuum arc melting is carried out in protection of inert gas.
Preferably, the air pressure of described vacuum arc melting is 0.02～0.04MPa.
Preferably, the particle diameter of described molten tin bath additive is 1～5mm.
Preferably, after described vacuum arc melting, also comprise: by smelted product slag refining.
Compared with prior art, the production method of float glass of the present invention, comprises the following steps: glass is carried out to melting, obtain glass metal; Locate 650～750 DEG C of molten tin bath contraction sections, molten tin bath additive is joined in tin liquor; Make described glass metal enter molten tin bath, obtain glass ribbon; By described glass ribbon annealing, obtain float glass, iron tin monotectic or hypomonotectic alloy that the quality percentage composition that described molten tin bath additive is tin is 18～48.8%, fusing point is 1130～1400 DEG C.Because the fusing point of tin is lower than iron, add after the tin of suitable proportion, contribute to molten tin bath additive to there is lower fusing point.When the molten tin bath additive of low melting point joins in the tin liquor in molten tin bath, can not cause tin liquor temperature acutely to decline, thereby avoid producing bubble.Secondly, the ratio of tin and iron is suitable, after adding in tin liquor, is not easy to make iron too enrichment in part, has also avoided production bubble.Further, described molten tin bath additive in the preparation, can be in melting slag refining, further remove impurity.The advantage of comprehensive described three aspects:, is used molten tin bath additive of the present invention to contribute to obtain the high quality float glass that bubble is few, stannize amount is little.
Brief description of the drawings
Fig. 1 is the Fe-Sn monotectic phasor of embodiment 1～3 molten tin bath additive.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
The production method that the embodiment of the invention discloses a kind of float glass, comprises the following steps: glass is carried out to melting, obtain glass metal; In the time of 650～750 DEG C of molten tin bath contraction sections, molten tin bath additive is joined in tin liquor; Make described glass metal enter molten tin bath, obtain glass ribbon; By described glass ribbon annealing, obtain float glass, it is characterized in that, iron tin monotectic or hypomonotectic alloy that the quality percentage composition that described molten tin bath additive is tin is 18～48.8%, fusing point is 1130～1400 DEG C.
In the present invention, first glass is carried out to melting, obtain glass metal.The present invention is not particularly limited for method and the temperature of melting, according to the familiar mode of those skilled in the art.
In the present invention, described molten tin bath additive is iron tin monotectic or hypomonotectic alloy, and wherein, the quality percentage composition of tin is 18～48.8%, is preferably 25～38%, more preferably 28～35%.In described molten tin bath additive, tin and iron evenly mix, and fusing point is 1130～1400 DEG C, easily fusing.Described molten tin bath additive, balanced weave is Fe and FeSn.
Molten tin bath additive of the present invention in use, adds during in middle-temperature section at molten tin bath, and molten tin bath adds in the time of 650～750 DEG C of contraction sections, is preferably 680～720 DEG C.The addition of described molten tin bath additive, depending on iris grade, when preferred iris grade is 3.0 grades, adds 2.0kg for every eight hours, repeatedly throws on a small quantity.The present invention is not particularly limited for the mode that adds of described molten tin bath additive, can adopt automatic charging equipment to add or manually add.The present invention is for joining day of molten tin bath additive and add speed to be also not particularly limited, and those skilled in the art can suitably regulate according to practical situation.
The preparation method of described molten tin bath additive preferably includes following steps:
The iron of the tin of 18～48.8wt% and 51.2～82wt% is mixed, and vacuum arc melting, obtains the uniform mother alloy of composition;
Described mother alloy is carried out to granulation, and the quality percentage composition that obtains tin is 18～48.8%, and fusing point is the molten tin bath additive of 1130～1400 DEG C.
The present invention, taking tin and iron as raw material, first mixes according to mass ratio, and the quality percentage composition of described tin is 18～48.8wt%, is preferably 25～38wt%, more preferably 28～35wt%.The quality percentage composition of described iron is 51.2～82wt%, is preferably 62～75wt%, more preferably 65～78wt%.
By after tin and iron mixing, vacuum arc melting, obtains the uniform mother alloy of composition.Described vacuum arc melting is preferably carried out in protection of inert gas, and described rare gas element is preferably argon gas.The air pressure of described vacuum arc melting is preferably 0.02～0.04MPa.In order to make impurity still less, after described vacuum arc melting, preferably also comprise: by smelted product slag refining.The present invention is not particularly limited the method for slag refining, according to mode well known to those skilled in the art.
Obtain after mother alloy, mother alloy is carried out to granulation, obtain molten tin bath additive.The particle diameter of described molten tin bath additive is 1～5mm, is preferably 2～4mm.
Obtain after glass metal, allow glass metal flow in the molten tin bath being added with after molten tin bath additive, obtain glass ribbon, by described glass ribbon annealing, obtain float glass.The present invention is also not particularly limited for mode and the temperature of described annealing, according to mode well known to those skilled in the art.
Molten tin bath additive of the present invention, is the ferro-tin alloy that the quality percentage composition of tin is 18～48.8%, and fusing point is 1130～1400 DEG C.Because the fusing point of tin is lower than iron, add after the tin of suitable proportion, contribute to molten tin bath additive to there is lower fusing point.When the molten tin bath additive of low melting point joins in the tin liquor in molten tin bath, can not cause tin liquor temperature acutely to decline, thereby avoid producing bubble.Secondly, the ratio of tin and iron is suitable, after adding in tin liquor, is not easy to make iron too enrichment in part, has also avoided bubble formation.Further, described molten tin bath additive in the preparation, can be in melting slag refining, further remove impurity.The advantage of comprehensive described three aspects:, is used molten tin bath additive of the present invention to contribute to obtain the high quality float glass that bubble is few, stannize amount is little.
In order further to understand the present invention, below in conjunction with embodiment, molten tin bath additive provided by the invention and preparation method thereof and using method are described, protection scope of the present invention is not limited by the following examples.
Embodiment 1
By after 488 grams of tin and 512 grams of iron mixing, adopt gas shield arc melting, melt back obtains the uniform alloy of composition;
Mother alloy is placed in to mechanism, and by its moulding, obtaining particle diameter is the molten tin bath additive of 3mm.
Fig. 1 is the Fe-Sn monotectic phasor of embodiment 1～3 molten tin bath additive.In Fig. 1, A is the molten tin bath additive of embodiment 1, and B is the molten tin bath additive of embodiment 2, and C is the molten tin bath additive of embodiment 3, and its balanced weave is α-Fe and adds FeSn phase.Known according to Fig. 1, the mass percent composition of this sample approaches monotectic point, separates out α-Fe and new liquid phase L2 from melt L1, and remaining liquid phase changes the mixture of α-Fe and FeSn phase into, and its tissue signature is α-Fe particle, and matrix is FeSn compound.Its fusing point is 1130 DEG C.
Embodiment 2
By after 380 grams of tin and 620 grams of iron mixing, adopt gas shield arc melting, melt back obtains the uniform alloy of composition;
Mother alloy is placed in to mechanism, and by its moulding, obtaining particle diameter is the molten tin bath additive of 3mm.
According to phasor,, there is a large amount of bulk α-Fe particles and FeSn phase in the balanced weave hypomonotectic of this molten tin bath additive, and its fusing point is 1216 DEG C.
Embodiment 3
By after 250 grams of tin and 750 grams of iron mixing, adopt gas shield arc melting, melt back obtains the uniform alloy of composition;
Mother alloy is placed in to mechanism, and by its moulding, obtaining particle diameter is the molten tin bath additive of 3mm.
According to phasor,, there is a large amount of bulk α-Fe particles and FeSn phase in the balanced weave hypomonotectic of this molten tin bath additive, and its fusing point is 1322 DEG C.
Embodiment 4
Locate 720 DEG C of molten tin baths, the molten tin bath additive of by a porcelain tube being prepared by embodiment 1 with automatic charging equipment adds in tin liquor automatically, within every 8 hours, add iron 2kg, input 0.25kg per hour, according to this amount add until iris level down be low to moderate 1.0 grades and keep stable after, add iron amount and change every eight hours 1.2kg into, the iron 0.15kg that adds per hour, this adds iron amount to produce stable rear maintenance.
Glass (raw material) is carried out to melting, and the cooling glass metal that obtains 1100 DEG C, enters molten tin bath from glass melter cooling end through runner chute.
Glass metal tin liquor surface in molten tin bath under self gravitation effect spreads out, and under surface tension effects, forms glass ribbon, and the equilibrium thickness of glass ribbon remains on 6～7mm.Glass ribbon is introduced annealing furnace through transition roller table runner after leaving molten tin bath, anneals according to annealing curve.Enter subsequently cold junction, through subsequent steps such as cuttings, obtain float glass.
The float glass obtaining is carried out to XRF test, and test result shows, the float glass bubble obtaining is few, and stannize amount is little.
Embodiment 5
Locate 720 DEG C of molten tin baths, the molten tin bath additive of by a porcelain tube being prepared by embodiment 2 with automatic charging equipment adds in tin liquor automatically, within every 8 hours, add iron 2kg, input 0.25kg per hour, according to this amount add until iris level down be low to moderate 1.0 grades and keep stable after, add iron amount and change every eight hours 1.2kg into, the iron 0.15kg that adds per hour, this adds iron amount to produce stable rear maintenance.
Frit is carried out to melting, and the cooling glass metal that obtains 1100 DEG C, enters molten tin bath from glass melter cooling end through runner chute.
Glass metal tin liquor surface in molten tin bath under self gravitation effect spreads out, and under surface tension effects, forms glass ribbon, and the equilibrium thickness of glass ribbon remains on 6～7mm.Glass ribbon is introduced annealing furnace through transition roller table runner after leaving molten tin bath, anneals according to annealing curve.Enter subsequently cold junction, through subsequent steps such as cuttings, obtain float glass.
The float glass obtaining is carried out to XRF test, and test result shows, the float glass bubble obtaining is few, and stannize amount is little.
Embodiment 6
Locate 720 DEG C of molten tin baths, the molten tin bath additive of by a porcelain tube being prepared by embodiment 3 with automatic charging equipment adds in tin liquor automatically, within every 8 hours, add iron 2kg, input 0.25kg per hour, according to this amount add until iris level down be low to moderate 1.0 grades and keep stable after, add iron amount and change every eight hours 1.2kg into, the iron 0.15kg that adds per hour, this adds iron amount to produce stable rear maintenance.Frit is carried out to melting, and the cooling glass metal that obtains 1100 DEG C, enters molten tin bath from glass melter cooling end through runner chute.
Glass metal tin liquor surface in molten tin bath under self gravitation effect spreads out, and under surface tension effects, forms glass ribbon, and the equilibrium thickness of glass ribbon remains on 6～7mm.Glass ribbon is introduced annealing furnace through transition roller table runner after leaving molten tin bath, anneals according to annealing curve.Enter subsequently cold junction, through subsequent steps such as cuttings, obtain float glass.
The float glass obtaining is carried out to XRF test, and test result shows, the float glass bubble obtaining is few, and stannize amount is little.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a production method for float glass, comprises the following steps: glass is carried out to melting, obtain glass metal; In the time of 650～750 DEG C of molten tin bath contraction sections, molten tin bath additive is joined in tin liquor; Make described glass metal enter molten tin bath, obtain glass ribbon; By described glass ribbon annealing, obtain float glass, it is characterized in that, iron tin monotectic or hypomonotectic alloy that the quality percentage composition that described molten tin bath additive is tin is 18～48.8%, fusing point is 1130～1400 DEG C.
2. production method according to claim 1, is characterized in that, during described molten tin bath adds, the quality percentage composition of tin is 25～38%.
3. production method according to claim 1, is characterized in that, the preparation method of described molten tin bath additive, comprises the following steps:
The iron of the tin of 18～48.8wt% and 51.2～82wt% is mixed, and vacuum arc melting, obtains the uniform mother alloy of composition;
Described mother alloy is carried out to granulation, and the quality percentage composition that obtains tin is 18～48.8%, and fusing point is the molten tin bath additive of 1130～1400 DEG C.
4. production method according to claim 3, is characterized in that, described vacuum arc melting is carried out in protection of inert gas.
5. production method according to claim 3, is characterized in that, the air pressure of described vacuum arc melting is 0.02～0.04MPa.
6. production method according to claim 3, is characterized in that, the particle diameter of described molten tin bath additive is 1～5mm.
7. production method according to claim 3, is characterized in that, after described vacuum arc melting, also comprises: by smelted product slag refining.
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| CN201410146141.4A CN104108859B (en) | 2014-04-11 | 2014-04-11 | Production method of float glass |
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| CN201410146141.4A CN104108859B (en) | 2014-04-11 | 2014-04-11 | Production method of float glass |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399309A (en) * | 2015-09-18 | 2016-03-16 | 福耀集团通辽有限公司 | Process for preventing glass from rainbow emergence, and material feeding apparatus thereof |
| CN106698902A (en) * | 2016-12-22 | 2017-05-24 | 重庆天和玻璃有限公司 | Method for preparing glass with holes |
| CN106746508A (en) * | 2016-12-22 | 2017-05-31 | 重庆天和玻璃有限公司 | The preparation facilities of glass with hole |
| CN108911500A (en) * | 2018-09-03 | 2018-11-30 | 中建材蚌埠玻璃工业设计研究院有限公司 | A kind of method of molten tin antioxidant in raising float glass |
| CN108950296A (en) * | 2018-08-23 | 2018-12-07 | 中建材（濮阳）光电材料有限公司 | A kind of preparation method of ultra-white float glass tin liquor additive |
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| CN203095847U (en) * | 2012-12-27 | 2013-07-31 | 海南中航特玻材料有限公司 | Tin bath iron adding groove |
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2014
- 2014-04-11 CN CN201410146141.4A patent/CN104108859B/en not_active Expired - Fee Related
Patent Citations (1)
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| CN203095847U (en) * | 2012-12-27 | 2013-07-31 | 海南中航特玻材料有限公司 | Tin bath iron adding groove |
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| 徐海波: "《控制锡液中含氧量 防止浮法玻璃污染》", 《辽宁建材》, 28 February 2005 (2005-02-28), pages 40 - 1 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399309A (en) * | 2015-09-18 | 2016-03-16 | 福耀集团通辽有限公司 | Process for preventing glass from rainbow emergence, and material feeding apparatus thereof |
| CN106698902A (en) * | 2016-12-22 | 2017-05-24 | 重庆天和玻璃有限公司 | Method for preparing glass with holes |
| CN106746508A (en) * | 2016-12-22 | 2017-05-31 | 重庆天和玻璃有限公司 | The preparation facilities of glass with hole |
| CN106698902B (en) * | 2016-12-22 | 2019-05-28 | 重庆重玻节能玻璃有限公司 | The preparation method of glass with hole |
| CN108950296A (en) * | 2018-08-23 | 2018-12-07 | 中建材（濮阳）光电材料有限公司 | A kind of preparation method of ultra-white float glass tin liquor additive |
| CN108911500A (en) * | 2018-09-03 | 2018-11-30 | 中建材蚌埠玻璃工业设计研究院有限公司 | A kind of method of molten tin antioxidant in raising float glass |
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| CN104108859B (en) | 2017-02-15 |
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