CN103896476A - Smelting device for preparing optical glass by using high-frequency induction furnace - Google Patents
Smelting device for preparing optical glass by using high-frequency induction furnace Download PDFInfo
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- CN103896476A CN103896476A CN201410089950.6A CN201410089950A CN103896476A CN 103896476 A CN103896476 A CN 103896476A CN 201410089950 A CN201410089950 A CN 201410089950A CN 103896476 A CN103896476 A CN 103896476A
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Abstract
The invention discloses a smelting device for preparing optical glass by using a high-frequency induction coil. The smelting device comprises a quartz cap, a glassy carbon crucible (4) and a heat insulation plate (3), wherein the quartz cap consists of a quartz cup (2) and a quartz cover (1); an air inlet quartz branch pipe (2-1) is arranged at the lower part of the quartz cup (2); the reverse U-shaped heat insulation plate (3) with a netlike small hole (3-1) is arranged at the bottom of the inner wall of the quartz cup (2); the cylindrical glassy carbon crucible (4) is arranged on the heat insulation plate; the inner diameter of the lower edge of the quartz cover (1) is equivalent to the outer diameter of the upper edge of the quartz cup; an air outlet quartz pipe (1-1) is arranged at the top end of the quartz cover. The smelting device is put into the high-frequency induction coil (5), and provides an efficient temperature control environment by virtue of eddy current generated in the glassy carbon crucible. When inert gas is introduced, the smelting device can be used for generating uniformly-distributed gas flows in the quartz cap so as to provide a stable temperature field and a high-purity gas protection atmosphere. Meanwhile, the air outlet hole above the quartz cover provides a space for stirring paddles.
Description
Technical field
The present invention relates to a kind of device of special optical glass melting, be particularly suitable for small size, the high purity opticglass of use for laboratory.
Background technology
The method of making in laboratory small size, polycomponent opticglass mainly adopts the processes such as globars heating by electric cooker, die casting and annealing operation at present.The processes such as the material of glass in the process of founding, clarification, stirring, homogenizing are all carried out in unlimited heating by electric cooker environment, and the very easily impurity such as dust, water vapour in introducing air has had a strong impact on physicochemical property and the optical property of glass.And because heating by electric cooker speed is slower, the glass smelting time is longer, make the constituent of multicomponent glass, more particularly contain the material of easy volatile, as phosphoric acid salt, fluorochemical etc., component ratio after founding and proportioning raw materials differ larger, are unfavorable for the quantitative examination of optical glass element.
The normal crucible using of pieces of glass is prepared in laboratory corundum crucible, quartz crucible and platinum crucible.Be subject to the impact of itself character, the use range of various crucibles is limited, and as the not erosion of resistance to rare earth element of corundum crucible, the glass of preparation contains more bubble and striped simultaneously; Quartz crucible can improve the good article rate of glass, but is not suitable for high alkali glass and fluorine-containing glass; The optical homogeneity that platinum crucible can improve glass reduces the pollution of crucible to glass, but cannot found the glass that contains phosphoric acid salt, sulphur, selenium, tellurium and high-content fluorochemical.
Optical glass smelting device of the present invention adopts vitreous carbon crucible, coordinates high frequency furnace to found, and has avoided the pollution of crucible to opticglass, and the convenient quenching to melt has met the cooling requirement fast of some glass; Can adopt multiple atmosphere protection, founding the reserved port that stirs in device top, can realize under atmosphere protection and stirring simultaneously.Be that a kind of scope on probation is wide, prepare the opticglass of high quality high evenness and found device.
Summary of the invention
Technical problem: the object of the invention is to, overcome the deficiency of conventional art, a kind of device for the high-purity opticglass melting of laboratory small-medium size is provided.Optical glass smelting device adopts vitreous carbon crucible, coordinates high frequency furnace to found, and has avoided the pollution of crucible to opticglass, and the convenient quenching to melt has met the cooling requirement fast of some glass; Can adopt multiple atmosphere protection, founding the reserved port that stirs in device top, can realize under atmosphere protection and stirring simultaneously.Improve the transparency of glass, reduced the generation of striped, bubble and calculus, reduced the crystallization of glass and burst possibility, thereby met the demand of making experimental study opticglass.
Technical scheme: a kind of device for opticglass melting of the present invention, comprise quartz cover, vitreous carbon crucible and thermal baffle, described quartz cover is made up of quartz curette and quartz cover, the bottom of quartz curette is provided with an air inlet quartz arm, an inverted U thermal baffle with netted aperture is arranged at quartz curette inwall bottom, on thermal baffle, place cylindrical glass carbon crucible, the lower edge internal diameter of quartz cover is suitable with the upper limb external diameter of quartz curette, and the top of quartz cover is provided with the silica tube of giving vent to anger.
The air intake branch aperture of described quartz cover is less than the arm aperture of giving vent to anger, quartz curette interior bottom portion is provided with an inverted U thermal baffle, thermal baffle top is circular dull and stereotyped, under dull and stereotyped central zone, it is little hemisphere, it is around an annular region with netted aperture, directly over flat board, place a cylindrical crucible, crucible diameter is suitable with smaller part spheroid upper surface diameter.
Described quartz cover lid and cup junction, through frosted processing, reach sealing gland effect.The corner of quartz cover all adopts arc design, increases the stability of structure.Quartz cover top go out the air intake branch that gas branch pipe diameter is greater than bottom, large I provides the space of stirring.The netted aperture total area of thermal baffle and the quartz curette floorage ratio that are positioned at quartz cover bottom are enough large, ensure that air-flow is unobstructed.
Described inverted U thermal baffle top is circular dull and stereotyped, under dull and stereotyped central zone, it is little hemisphere, it is around an annular region with netted aperture, directly over place a cylindrical crucible, crucible diameter and internal radius are suitable, ensure that air-flow around crucible is evenly distributed, the moulding of glass while being conducive to rapid cooling.Thermal baffle material is alumina hollow ball, can heatproof degree 1800 DEG C.
Described crucible material is vitreous carbon, has that void content is low, an advantage such as high stability and unreactiveness.Vitreous carbon crucible, as the container of heating opticglass, has good heat conductivity, does not at high temperature bond with glass, thereby can realize the straight forming of glass in crucible.The heat of vitreous carbon crucible is carried out in the protection of rare gas element.
Beneficial effect: compared with prior art, the invention has the advantages that:
(1) temperature control speed is fast, can realize and being rapidly heated and rapid temperature-fall period.The present invention adopts high frequency furnace as heating unit, and vitreous carbon crucible is as carrier, and intensification efficiency is high, low-loss and energy-saving, thereby the volatilization impact of the glass ingredient causing in minimizing glass smelting process.Realize the rapid cooling to glass melt by air-flow heat-carrying, reduce the possibility of crystallization.
(2) the present invention, by continue to pass into rare gas element at inlet mouth, forms the inside and outside malleation of quartz cover, makes crucible in sufficient inert gas environment protection, thereby eliminates the introducing of founding impurity in process.
(3) due to the transparent nature of quartz cover, be convenient to observe the state of melt, the production well of quartz cover is larger, can realize real-time stirring.
(4) the present invention adopts straight forming method, has avoided producing in die casting process additional bubble striped.The thermal baffle of employing with netted aperture, the gas uniform that has ensured quartz cover inside upwards flows, and avoids the phenomenons such as the horizontal inhomogeneous variation in cooling lower temperature field causes rapidly glass rupture.
(5) simple in structure, easy and safe to operate.Opticglass of the present invention is founded device and is all carried out in quartz cover inside at hot operation, avoids human body directly to contact hot environment, easy and safe to operate.
Brief description of the drawings
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is quartz cover schematic side view of the present invention.
Fig. 3 is quartz curette sectional structure schematic diagram of the present invention.
Fig. 4 is thermal baffle sectional structure schematic diagram of the present invention.
Wherein have: 1 quartz cover, 1-1 goes out gas branch pipe, 2 quartz curettes, 2-1 air intake branch, 3 thermal baffles, the netted aperture of 3-1, the little hemisphere of 3-2,4 vitreous carbon crucibles, 5 radio-frequency coils.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
A kind of smelting apparatus that utilizes high frequency furnace to prepare opticglass of the present invention comprises quartz cover, inverted U thermal baffle and is positioned over the vitreous carbon crucible on thermal baffle, quartz cover is made up of quartz curette 2 and quartz cover 1, inverted U thermal baffle 3 is positioned at quartz curette interior bottom portion, directly over thermal baffle, place a vitreous carbon crucible 4, as heating container.
In described quartz cover, quartz curette becomes cylindrical shape, there is an air inlet quartz arm 2-1 at Bei Di center, the lower edge internal diameter of quartz cover is suitable with the upper limb external diameter of quartz curette, and quartz cover and quartz curette junction, through frosted processing, reach sealing gland effect, be positioned at quartz cover top and be provided with the short arm 1-1 of wide aperture quartz that runs through caping, as air outlet and the mixing position of gas, the corner of quartz cover all adopts arc design, increases the stability of structure.
Described inverted U thermal baffle, top is circular dull and stereotyped, under dull and stereotyped central zone, be smaller part spheroid 3-2, around an annular region 3-1 with netted aperture, the netted aperture total area and quartz curette floorage ratio are enough large, ensure that air-flow is unobstructed, and thermal baffle sidewall and quartz cover keep slight distance, thermal baffle material is alumina hollow ball, can heatproof degree 1800 DEG C.
Described vitreous carbon crucible is cylinder shape, and its diameter is suitable with smaller part spheroid upper surface diameter, ensures that air-flow around crucible is evenly distributed.
Example:
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, this novel smelting apparatus of preparing opticglass comprises quartz cover, quartz curette, thermal baffle and vitreous carbon crucible.
Quartz cover is placed on the support in high frequency furnace ruhmkorff coil, and the quartzy arm at the bottom of quartz curette connects the inlet pipe of argon bottle.Before glass smelting, take required raw material, after fully mixing, add vitreous carbon crucible, add powder in water-removal agent submergence crucible simultaneously, then crucible is placed on thermal baffle, stirring rod is passed to quartz cover production well, cover quartz cover, pass into after argon gas 10min, High-frequency machine is warming up to rapidly glass melting temperature, through clarification, stirring, homogenization process, close high frequency furnace and pass into argon gas and lower the temperature rapidly.Take out crucible and be placed in the retort furnace that is warming up to glass transformation temperature and anneal, obtain the high-performance optical glass after dewatering.
Embodiment recited above is only the description that the preferred embodiment of the present invention is carried out; not the spirit and scope of the present invention are limited; the present invention relates to conceive under prerequisite not departing from; various distortion and improvement that in this area, common engineering technical personnel make technical scheme of the present invention, all should fall into protection scope of the present invention.
Claims (2)
1. a smelting apparatus that utilizes radio-frequency induction coil to prepare opticglass, comprise quartz cover, vitreous carbon crucible (4) and thermal baffle (3), it is characterized in that: described quartz cover is made up of quartz curette (2) and quartz cover (1), the bottom of quartz curette (2) is provided with an air inlet quartz arm (2-1), an inverted U thermal baffle (3) with netted aperture (3-1) is arranged at quartz curette (2) inwall bottom, on thermal baffle, place cylindrical glass carbon crucible (4), the lower edge internal diameter of quartz cover (1) is suitable with the upper limb external diameter of quartz curette, the top of quartz cover is provided with the silica tube of giving vent to anger (1-1).
2. the device for opticglass melting according to claim 1, it is characterized in that: air intake branch (2-1) aperture of described quartz cover is less than gas branch pipe (1-1) aperture, quartz curette interior bottom portion is provided with an inverted U thermal baffle (3), thermal baffle top is circular dull and stereotyped, under dull and stereotyped central zone, be little hemisphere (3-2), it is around an annular region with netted aperture (3-1), directly over flat board, place a cylindrical crucible (4), crucible diameter is suitable with smaller part spheroid upper surface diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410089950.6A CN103896476A (en) | 2014-03-12 | 2014-03-12 | Smelting device for preparing optical glass by using high-frequency induction furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410089950.6A CN103896476A (en) | 2014-03-12 | 2014-03-12 | Smelting device for preparing optical glass by using high-frequency induction furnace |
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| CN103896476A true CN103896476A (en) | 2014-07-02 |
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| CN201410089950.6A Pending CN103896476A (en) | 2014-03-12 | 2014-03-12 | Smelting device for preparing optical glass by using high-frequency induction furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249739A (en) * | 2016-12-28 | 2018-07-06 | 中天科技精密材料有限公司 | Smelting apparatus and the method using the device smelting glass |
| CN114436512A (en) * | 2022-02-10 | 2022-05-06 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN118491418A (en) * | 2024-07-17 | 2024-08-16 | 浙江阿佩克斯能源科技有限公司 | Reaction vessel for kiln |
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Patent Citations (9)
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| CN1569706A (en) * | 2003-07-23 | 2005-01-26 | 上海仲堂特种光学材料科技发展有限公司 | Optical glass with superhigh refractive index and its founding process |
| JP2009263175A (en) * | 2008-04-25 | 2009-11-12 | Bridgestone Corp | Firing furnace and production method of silicon carbide powder |
| CN101570392A (en) * | 2008-04-30 | 2009-11-04 | 日本超精石英株式会社 | Crucible lift device and method for taking-out crucible |
| CN201458946U (en) * | 2009-07-17 | 2010-05-12 | 成都赛林斯科技实业有限公司 | Quartz crucible for fusion-casting lanthanide optical glass |
| CN102288028A (en) * | 2011-08-03 | 2011-12-21 | 马忠臣 | Medium frequency induction heating smelting device based on combination of electromagnetic stirring and mechanical vibration |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249739A (en) * | 2016-12-28 | 2018-07-06 | 中天科技精密材料有限公司 | Smelting apparatus and the method using the device smelting glass |
| CN114436512A (en) * | 2022-02-10 | 2022-05-06 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN114436512B (en) * | 2022-02-10 | 2023-06-23 | 成都光明光电有限责任公司 | Glass block forming device and forming method thereof |
| CN118491418A (en) * | 2024-07-17 | 2024-08-16 | 浙江阿佩克斯能源科技有限公司 | Reaction vessel for kiln |
| CN118491418B (en) * | 2024-07-17 | 2024-10-08 | 浙江阿佩克斯能源科技有限公司 | Reaction vessel for kiln |
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Application publication date: 20140702 |