CN201250170Y - Low-melting glass preparing furnace - Google Patents

Low-melting glass preparing furnace Download PDF

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Publication number
CN201250170Y
CN201250170Y CNU2008201102055U CN200820110205U CN201250170Y CN 201250170 Y CN201250170 Y CN 201250170Y CN U2008201102055 U CNU2008201102055 U CN U2008201102055U CN 200820110205 U CN200820110205 U CN 200820110205U CN 201250170 Y CN201250170 Y CN 201250170Y
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China
Prior art keywords
furnace
glass
low melting
melting point
furnace hearth
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Expired - Lifetime
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CNU2008201102055U
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Chinese (zh)
Inventor
李宏彦
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to CNU2008201102055U priority Critical patent/CN201250170Y/en
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Abstract

The utility model relates to a low-melting glass preparing furnace comprising a furnace tank; a cover board is arranged at the top part of the furnace tank, a feed inlet which is connected with the furnace tank in a conducting way is arranged in the middle part of the cover board, a heating source arranged above the cover board is arranged at the surrounding part of the feed inlet, the coverage area of the heat source is less than the horizontal cross-sectional area of the furnace tank by 1/8; a discharging outlet which is connected with the furnace tank in a conducting way is arranged at the bottom position of the furnace tank, and the bottom of the furnace body is opposite to the feed inlet. In the low-melting glass preparing furnace, the furnace tank is locally heated by the heat source, a temperature distributing gradient is formed inside and outside the furnace body, and the solid body of the glass liquid can be formed in the inner wall of the furnace tank, thus the solid body of the glass liquid is prevented from directly contacting with the inner wall of the furnace tank, the furnace tank is effectively prevented from being eroded by high-temperature glass liquid, the service life of the furnace tank is prolonged and the preparing cost of the low-melting glass is obviously reduced; owning to the corrosion resistance of the solid body of the glass liquid, the purity of prepared low-melting glass is beneficial to being improved.

Description

Furnace for preparing glass with low melting point
Technical field
The utility model relates to the glass preparation technical field, particularly relates to a kind of furnace for preparing glass with low melting point.
Background technology
Low melting glass, as: high pbo glass, Unlead low-smelting point glass etc. because fusing point is lower, have purposes widely in fields such as encapsulation, welding.But, adopt the kiln of common float glass can't satisfy the preparation requirement of high pbo glass because low melting glass liquid has stronger corrodibility under the high temperature.
In the preparation process of high pbo glass, can adopt can anti-high pbo glass corrosion the precious metal platinum prepare body of heater, prepare retort furnace, opening for feed, discharge port etc. as adopting platinum.Fig. 1 adopts the all-electric melting glass furnace structural representation of platinum retort furnace for prior art.As shown in Figure 1, in the prior art, the all-electric melting glass melter adopts sealing retort furnace kiln 11; Be provided with by platinum flue 12 in the retort furnace kiln 11.The glass raw material are rendered in the platinum flue 12 by platinum opening for feed 13.The sidewall in kiln pond 11 is provided with globars 14, behind globars 14 heating powers platinum flue 12 is heated; Glass metal after the processing can be derived platinum flue 12 by platinum discharge port 15.All-electric melting glass furnace as shown in Figure 1 adopts the body of heater of platinum material preparation, can reduce the corrosion of high pbo glass liquid to a certain extent, but the platinum costliness, cost is very high; And high temp glass liquid still can be introduced partial impurities to the washing away in the process of platinum flue 21, influences the preparation purity of high pbo glass.
And in the Unlead low-smelting point glass preparation process, Unlead low-smelting point glass liquid has stronger corrodibility to platinum, can not adopt platinum to prepare body of heater, at this moment, need the new corrosion resistant material that can resist the Unlead low-smelting point glass corrosion of exploitation, therefore, the cost of development of material is higher.
By above-mentioned analysis as can be known, prior art exists preparation cost high-technology defective in preparation low melting glass process.
The utility model content
The purpose of this utility model provides a kind of furnace for preparing glass with low melting point, in order to reduce the low melting glass preparation cost, improves low melting glass purity.
For achieving the above object, the utility model provides a kind of furnace for preparing glass with low melting point, comprise furnace hearth, described furnace hearth top is provided with cover plate, described cover plate middle part is provided with the opening for feed that is connected with described furnace hearth conducting, described opening for feed periphery is provided with the thermal source that is positioned at described cover plate top, and described thermal source area coverage is less than 1/8 of described furnace hearth horizontal cross-sectional area; The described furnace hearth bottom position relative with described opening for feed is provided with the discharge port that is connected with described furnace hearth conducting.
On the basis of technique scheme, described furnace hearth outer wall is connected with circulating refrigerating device; Described circulating refrigerating device is water-circulating cooling device or recirculating air device for cooling.
On the basis of technique scheme, be provided with first thermal baffle between described opening for feed and the described thermal source.The high corrosion resistance refractory heat isolating plate that described first thermal baffle can be platinum or adopts the high corrosion resistance refractory materials to make.The bottom surface of described thermal source is connected with described cover plate, and the top of described thermal source and outer side all are arranged with second thermal baffle.Described first thermal baffle or second thermal baffle can be high aluminosilicate fiberboard.Wherein, described thermal source can be nichrome wire, globars, Si-Mo rod or flame spray gun.The end that described discharge port exposes described furnace hearth is connected with suction pipe, and described suction pipe is connected with high-pressure air and vacuum unit, and described high-pressure air is filled in the described suction pipe or the junction of described suction pipe and described vacuum unit; Preferably, described suction pipe is a rubber hose.
The furnace for preparing glass with low melting point that the utility model provides, by thermal source being set at the furnace hearth top, this thermal source area coverage is less than 1/8 of furnace hearth horizontal cross-sectional area, thermal source local heating furnace hearth, make the inside and outside formation temperature distribution gradient of furnace hearth, form the solid-state body of glass metal at the furnace hearth inwall, solid-state body by glass metal stops high temp glass liquid to contact with the direct of furnace hearth inwall, effectively avoided of the corrosion of high temp glass liquid to furnace hearth, prolong furnace hearth work-ing life, obviously reduced the preparation cost of low melting glass; Simultaneously,, therefore in the low melting glass preparation process, can not introduce other impurity, help improving the purity of prepared low melting glass owing to adopt the solid-state body of glass metal anticorrosive.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 adopts the all-electric melting glass furnace structural representation of platinum retort furnace for prior art;
Fig. 2 is the utility model furnace for preparing glass with low melting point example structure synoptic diagram;
Fig. 3 is the utility model furnace for preparing glass with low melting point embodiment vertical view.
Description of reference numerals:
21-furnace hearth; 22-cover plate; 23-opening for feed;
24-thermal source; 25-discharge port; 26-the first thermal baffle;
27-circulating refrigerating device; 28-suction pipe; 29-vacuum unit;
210-the second thermal baffle.
Embodiment
Fig. 2 is the utility model furnace for preparing glass with low melting point example structure synoptic diagram.As shown in Figure 2, the utility model furnace for preparing glass with low melting point comprises furnace hearth 21, cover plate 22, opening for feed 23, thermal source 24 and discharge port 25.Furnace hearth 21 tops are provided with cover plate 22.Cover plate 22 middle parts are provided with opening for feed 23, and opening for feed 23 is connected with furnace hearth 21 conductings, is used for adding raw material to furnace hearth 21.Furnace hearth 21 bottoms are provided with discharge port 25, and this discharge port 25 is connected with furnace hearth 21 conductings, and discharge port 25 is relative with the position of opening for feed 23, and promptly the vertical axis of the vertical line axis of discharge port 25 and opening for feed 23 is positioned on the same vertical axis.The top of cover plate 22 and corresponding position, furnace hearth 21 middle part are provided with thermal source 24, thermal source 24 is laid around opening for feed 23, the area coverage of this thermal source 24 is less than furnace hearth 21 horizontal cross-sectional area, and preferred, the area coverage of thermal source 24 is less than 1/8 of the furnace hearth horizontal cross-sectional area.
The contriver finds in realizing the utility model process, the utility model low melting glass prepares the top that smelting furnace is arranged on thermal source 24 furnace hearth 21, and the area of furnace hearth 21 level cross-sectionns is much larger than the area coverage of thermal source 24,24 pairs of furnace hearths of thermal source 21 carry out local heating, promptly furnace hearth 21 middle parts and thermal source 24 overlay area respective regions are heated, and to the not heating of furnace hearth 21 stow away from heats 24 overlay areas, therefore formed the temperature distribution gradient in furnace hearth 21 inside, that is: furnace hearth middle part temperature is the highest, the furnace hearth lip temperature is minimum, is reduced gradually by the temperature of furnace hearth 21 middle parts to furnace hearth 21 edges.For example, as shown in Figure 2, may form three districts in glass metal temperature calibration gradient in furnace hearth 21 diffusion processes: I district, II district and III district.I district temperature higher (1100 ℃～800 ℃); II district temperature lower (800 ℃～400 ℃); III district temperature minimum (400 ℃～110 ℃).The part high temp glass liquid in I district spreads along furnace hearth 21 bottoms, be similar to funnel-shaped passage from the flush path of overhead stream to furnace hearth 21 bottoms of furnace hearth 21, because opening for feed 23 is positioned on the same vertical axis with discharge port 25, high temp glass liquid can be derived furnace hearth 21 by discharge port 25; Another part high temp glass liquid in I district is along the side diffusion of furnace hearth 21, because the temperature distribution gradient that forms in the furnace hearth 21, at high temp glass liquid in furnace hearth 21 side diffusion processes, the temperature of glass metal reduces gradually, temperature of glass liquid is when reducing to 800 ℃～400 ℃ (II district), and the flow velocity of glass metal obviously reduces; When temperature of glass liquid continued to reduce, glass metal began to be condensed into solid-state (glass metal begins to solidify in the time of 400 ℃ usually), had formed the solid-state body of glass metal in the I district.Like this, near furnace hearth 21 sidewalls and the bottom interior wall partially filled solid-state body that glass metal is arranged of (not comprising the part that furnace hearth 21 bottoms are connected with discharge port 25 conductings), solid-state body by glass metal is isolated direct contact of high temp glass liquid and furnace hearth 21 sidewalls, avoided of the corrosion of high temp glass liquid, prolonged the work-ing life of furnace hearth 21 furnace hearth 21; In addition, owing to adopt the solid-state body of glass metal anticorrosive, can therefore not help improving the purity of the low melting glass of preparing because of high temp glass corrosion furnace hearth 21 imports other impurity.For the preparation kiln of high pbo glass, can obviously reduce the usage quantity of platinum, obviously reduce the preparation cost of high pbo glass.
In the utility model furnace for preparing glass with low melting point, furnace hearth 21 can adopt the corrosion-resistant material that can resist the high temperature corrosion of low melting glass liquid to make, as: can adopt anti-corrosion brick one-tenth such as electric fused zirconium corundum.The thermal source 24 that is adopted can comprise nichrome wire, globars, Si-Mo rod or flame spray gun.Fig. 3 is the utility model furnace for preparing glass with low melting point embodiment vertical view.As shown in Figure 3, when being provided with a plurality of thermal source, a plurality of thermals source 24 can be used for the raw material that are added into furnace hearth 21 are carried out uniform heating treatment along all enclosing even the laying in 23 weeks of opening for feed.Usually, raw material than when temperature is low, have stronger corrodibility when temperature is higher.In order to reduce the corrodibility of raw material to opening for feed 23, can first thermal baffle 26 be set between opening for feed 23 and thermal source 24, be used to reduce by 24 pairs of opening for feed 23 Temperature Influence of thermal source, thereby reduce the raw material temperature, reduce the corrosion of raw material, prolong the work-ing life of opening for feed 23 opening for feed 23.First thermal baffle 26 can select for use the high corrosion resistance material to make, and preferred, first thermal baffle 26 is the platinum thermal baffle.First thermal baffle 26 also can be the high corrosion resistance refractory heat isolating plate that adopts other high corrosion resistance refractory materials preparations.In addition, first thermal baffle 26 also can select for use high lagging material to make, and preferred, this first thermal baffle 26 can be high aluminosilicate fiberboard.
Thermal source 24 heating have been added into the raw material in the furnace hearth 21.In order to improve Btu utilization efficient, also can adopt thermal baffle 26 that thermal source 24 and cover plate 22 are all enclosed, promptly above thermal source 24, be arranged with second thermal baffle 210 with outer side.Second thermal baffle 210 can select for use high lagging material to make, and preferred, this second thermal baffle 210 is high aluminosilicate fiberboard.In order to form more obvious temperature gradient distribution, can circulating refrigerating device 27 be set at furnace hearth 21 outer walls, this circulating refrigerating device 27 can be water-circulating cooling device or recirculating air device for cooling.Adopting the utility model furnace for preparing glass with low melting point to prepare low melting glass, as: in the preparation process of low melting glasses such as high pbo glass, Unlead low-smelting point glass, form the high insulation in furnace hearth 21 middle parts on the whole, the strong refrigerating scheme in furnace hearth 21 sides, both improve Btu utilization efficient thereby reach, the formation temperature Gradient distribution is effectively resisted the high temp glass corrosion by the solid-state body of glass metal again, improve glass preparation purity, prolong kiln work-ing life; Because the furnace hearth of the utility model furnace for preparing glass with low melting point efficiently solves erosion-resisting problem by the solid-state body that forms glass metal, therefore, a wider range for the selection of the manufactured materials in kiln pond 21, preparation for Unlead low-smelting point glass need not to develop new corrosion-resistant material, can obviously reduce the usage quantity of platinum for the preparation of high pbo glass, thereby on the selection angle of preparation kiln, the utility model furnace for preparing glass with low melting point also helps reducing the preparation cost of low melting glass.
On the basis of technique scheme, after glass metal in furnace hearth 21 is finished dealing with, in order effectively to derive the glass metal after handling, the utility model can expose the end connection suction pipe 28 of furnace hearth 21 at discharge port 25, and is connected with high-pressure air and vacuum unit 29 by suction pipe 28, high-pressure air can be filled in the junction of suction pipe 28 interior or suction pipe 28 and vacuum unit 29.This suction pipe 28 can be the material of the easy fusing of high temperature and makes, and preferred, this suction pipe 28 can be rubber hose.During the glass metal of the utility model furnace for preparing glass with low melting point after needs derive to be handled, vacuum unit 29 begins furnace hearth 21 is vacuumized, and when the air pressure in the furnace hearth 21 was lower than ambient pressure, the high temp glass liquid in the furnace hearth 21 outwards flowed out along discharge port 25.When high temp glass liquid is flowed through suction pipe 28 (as: rubber hose), high temperature fusing suction pipe 28 (as: rubber hose), being connected of disconnection discharge port 25 and vacuum unit 29 naturally, thus derive high pbo glass liquid smoothly.Only need change suction pipe 28 (as: rubber hose) and get final product when needing to use next time.Since siphon mode is applied in the high pbo glass liquid water conservancy diversion, simple and convenient, economical and practical, help reducing cost.
By the foregoing description analysis as seen, the technique effect that reaches of the utility model furnace for preparing glass with low melting point comprises at least:
1, the utility model furnace for preparing glass with low melting point is by being provided with thermal source at the furnace hearth top, this thermal source area coverage is less than 1/8 of furnace hearth horizontal cross-sectional area, thermal source local heating furnace hearth, make formation temperature distribution gradient in the furnace hearth, near filling glass liquid in the furnace hearth of opening for feed vertical axis position, be filled into away from the reduction of the glass metal Yin Wendu in the furnace hearth of opening for feed vertical axis position and solidify gradually, so form the solid-state body of glass metal at the furnace hearth inwall, solid-state body by glass metal stops high temp glass liquid to contact with the direct of furnace hearth inwall, effectively avoided of the corrosion of high temp glass liquid to furnace hearth, prolong furnace hearth work-ing life, obviously reduced the preparation cost of low melting glass; Simultaneously,, therefore in the low melting glass preparation process, can not introduce other impurity, help improving the purity of prepared low melting glass owing to adopt the solid-state body of glass metal anticorrosive;
2, the utility model furnace for preparing glass with low melting point can be connected by suction pipe discharge port with vacuum unit, when the glass metal after processing is flowed through suction pipe, and high temperature fusing suction pipe, smooth water conservancy diversion, simple and convenient, economical and practical, help further reducing the preparation cost of low melting glass.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of the utility model embodiment technical scheme.

Claims (10)

1, a kind of furnace for preparing glass with low melting point, it is characterized in that, comprise furnace hearth, described furnace hearth top is provided with cover plate, described cover plate middle part is provided with the opening for feed that is connected with described furnace hearth conducting, described opening for feed periphery is provided with the thermal source that is positioned at described cover plate top, and described thermal source area coverage is less than 1/8 of described furnace hearth horizontal cross-sectional area; The described furnace hearth bottom position relative with described opening for feed is provided with the discharge port that is connected with described furnace hearth conducting.
2, furnace for preparing glass with low melting point according to claim 1 is characterized in that, described furnace hearth outer wall is connected with circulating refrigerating device.
3, furnace for preparing glass with low melting point according to claim 2 is characterized in that, described circulating refrigerating device is water-circulating cooling device or recirculating air device for cooling.
4, furnace for preparing glass with low melting point according to claim 1 is characterized in that, is provided with first thermal baffle between described opening for feed and the described thermal source.
5, furnace for preparing glass with low melting point according to claim 4 is characterized in that, described first thermal baffle is platinum thermal baffle or high corrosion resistance refractory heat isolating plate.
6, furnace for preparing glass with low melting point according to claim 1 is characterized in that, the bottom surface of described thermal source is connected with described cover plate, and the top of described thermal source and outer side all are arranged with second thermal baffle.
According to claim 4 or 6 described furnace for preparing glass with low melting point, it is characterized in that 7, described first thermal baffle or second thermal baffle are high aluminosilicate fiberboard.
8, furnace for preparing glass with low melting point according to claim 1 is characterized in that, described thermal source is nichrome wire, globars, Si-Mo rod or flame spray gun.
9, furnace for preparing glass with low melting point according to claim 1, it is characterized in that, the end that described discharge port exposes described furnace hearth is connected with suction pipe, described suction pipe is connected with high-pressure air and vacuum unit, and described high-pressure air is filled in the described suction pipe or the junction of described suction pipe and described vacuum unit.
10, furnace for preparing glass with low melting point according to claim 9 is characterized in that, described suction pipe is a rubber hose.
CNU2008201102055U 2008-08-25 2008-08-25 Low-melting glass preparing furnace Expired - Lifetime CN201250170Y (en)

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CNU2008201102055U CN201250170Y (en) 2008-08-25 2008-08-25 Low-melting glass preparing furnace

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CNU2008201102055U CN201250170Y (en) 2008-08-25 2008-08-25 Low-melting glass preparing furnace

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CN201250170Y true CN201250170Y (en) 2009-06-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111204955A (en) * 2020-01-16 2020-05-29 成都光明光电股份有限公司 Method for producing optical glass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111204955A (en) * 2020-01-16 2020-05-29 成都光明光电股份有限公司 Method for producing optical glass

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Granted publication date: 20090603