CN102910799B - Heating electrode and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode - Google Patents
Heating electrode and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode Download PDFInfo
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Abstract
The invention discloses a kind of heating electrode and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode, silicate glass containing boron and aluminium without alkali melting furnaces comprise melting furnaces main body, described melting furnaces main body is melting end, multiple heating electrode is installed at the bottom of the pond of described melting end, described heating electrode comprises electrode, the shape of described electrode is that semicircle is spherical, power supply is connected to described electrode by cable, described electrode is molybdenum electrode, described base part is provided with watercooling jacket, and described watercooling jacket is connected by silver strip with between electrode.Heating electrode of the present invention and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode, the electrode be located at the bottom of melting end pond is molybdenum electrode, molybdenum electrode is that semicircle is spherical, long service life, can use within the whole melting furnaces cycle, avoid electrode damage on the impact of glass melting, and Mo used is few, can reduces costs.
Description
Technical field
The present invention relates to glass melter technical field, particularly a kind of heating electrode and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode.
Background technology
Silicate glass containing boron and aluminium without alkali has a series of good characteristics such as thermal expansivity is low, physical strength is high, chemical stability is good, high temperature resistant, is widely applied.Due to silicon-dioxide in glass composition and alumina content high, glass is infusibilized, and high temperature viscosity is large, clarification homogenizing difficulty, and for obtaining the flawless glass of clear homogeneous, required temperature of fusion is high, is generally higher than 1600 DEG C; Under high temperature, boron volatile quantity is large, and glass metal surface easily produces Si-rich phase, makes glass produce the defects such as striped.Usual glass melter adopts flame to heat mostly, due to the thermal conductivity of glass metal and mobility poor, and bottom glass liquid is away from flame, and thus bottom glass liquid temp is lower, makes bottom produce stagnant layer, the easy crystallization of glass and affect the quality of glass.If only improve bottom glass liquid temp by improving flame temperature, then can aggravate the volatilization of boron, flame space temperature is too high in addition, can aggravate again the erosion of furnace refractory, thus produces more glass defect, shortens the work-ing life of melting furnaces.Alkali-free boroaluminosilicate is very high to the specification of quality of glass, with glass defect during traditional flame burning melting furnaces fusing silicate glass containing boron and aluminium without alkali is many, qualification rate is low.Traditional flame burning furnace superstructure room temps is higher, and more from the heat radiation of kiln top and breastwork, high-temperature exhaust emission has taken away amount of heat in addition, therefore traditional flame burning melting furnaces thermo-efficiency is low.
For overcoming the deficiency that simple flame brings, within 1902, VoelkerShi obtains the patent of electrified regulation, molten glass in frit, and the SauvegeonShi of France in 1907 obtains the patent right of energising smelting furnace.
The mode of electric smelting has four kinds:
(1) direct-electrifying, namely utilizes the joule heating molten glass that electric current produces in glass metal;
(2) utilize the radiation of resistance heater, carry out indirect heating;
(3) adopt the mode of above-mentioned (1) (2) simultaneously;
(4) ratio-frequency heating.
The relatively method of (1) ~ (4), the utilization efficiency of heat energy due to method (1) is high and extensively adopted by glass industry.
Electricity fusing-aid is the electroconductibility utilizing high temperature lower-glass liquid, by inserting electrode in bottom glass liquid, electric current is introduced in glass metal, two interelectrode glass metals produce joule heating under the effect of electric current, thus improve the temperature of bottom glass liquid, accelerate the fusing of admixtion, the clarification and homogenization of glass metal.
The advantage of electricity fusing-aid:
(1) glass melting quality is improved, homogeneous to the heating of glass metal entirety, so homogeneous glass can be obtained.
(2) can preserve the volatile component in raw material, with flame burner ratio, owing to improve bottom glass liquid temp, the temperature of top flame space can suitably reduce, thus decreases the volatilization of volatile component.
(3) topsoil is reduced, because fuel reduces, the corresponding minimizing of products of combustion, and volatile matter reduces, the waste gas and the Dust Capacity that are discharged into air reduce, so decrease topsoil.
(4) production adaptative ability is strong, can regulate melting capacity, meeting need of production by regulating electric power.
Compared with flame melting furnaces, electricity fusing-aid is owing to improve bottom glass liquid temp, and glass metal is very fast to the erosion of refractory materials, needs to adopt high-quality refractory materials, to overcome the shortening of the bad and melting furnace life-span of glass that refractory corrosion brings.
Heating electrode generally as electricity fusing-aid has: stannic oxide electrode, platinum electrode and molybdenum electrode.
Traditional stannic oxide electrode because use temperature low (less than 1500 DEG C), reductibility are strong, poor thermal shock resistance and limit the use of this electrode.Because silicate glass containing boron and aluminium without alkali temperature of fusion is high, glass metal erosional competency is strong, is not suitable for using traditional stannic oxide electrode.
Platinum electrode is owing to passing through the electric current of electrode very greatly, and electrode tip easily makes platinum electrode excessive loss because current density is excessive.Platinum is a kind of rare precious metals, expensive, and the loss of electrode not only shortens the life-span of electrode, makes cost increase, and the platinum particle that loss produces causes product defects, affects quality product.
Molybdenum electrode is widely used in the heating electrode of opticglass, glass fibre, borosilicate glass melting furnaces because its fusing point height is high temperature resistant, conductivity performance is good, anticorrosive and not easily make the advantages such as glass coloring.Shortcoming is expensive, and size and shape is restricted.
Adopt the glass melter of molybdenum electrode heating, the structure of molybdenum electrode and use directly affect the work-ing life of molybdenum electrode, thus directly affect the refining quality of glass and the work-ing life of melting furnaces.In patent CN1041858A, CN1762865A, CN1837110A, CN102209408A, CN201334426Y, molybdenum electrode of carrying is all bar-shaped molybdenum electrodes.Because bar-shaped molybdenum electrode diameter is less, do very long for meeting heating requirements needs, stretch into the about 500-700mm of length of glass metal, so just determine Mo needed for bar-shaped molybdenum electrode many and easily damage, one is easily rupture in heating-up furnace temperature-rise period, two be in use procedure electrode roots easily oxidized and glass metal corrode and rupture.After lead rupture, glass can not normal melt, easily produces glass defect, affects glass quality.Unaffected in order to ensure electricity fusing-aid, common way be by the electrode coupled together to jacking in glass metal, need in the process of jacking have a power failure, stop water coolant, very large on the impact of glass melting.Watercooling jacket break accident is easily there is, because jacket water temperature after cutting off the water is high, caused by water vapor is expanded when having pushed up rear logical water coolant.If electrode damage cannot be repaired, then glass melting cannot normally carry out, and melting furnaces only stop cold repair.
Molybdenum electrode described in patent CN101921051A is mounted on pool wall, is unfavorable for the temperature improving bottom glass liquid, is unfavorable for the effect giving full play to electricity fusing-aid.
Summary of the invention
The technical issues that need to address of the present invention are existing molybdenum electrodes is bar-shaped, and required Mo is many and easily damage, and not only affects glass quality but also affects production schedule.
For solving the problems of the technologies described above, the invention provides a kind of heating electrode of glass melter, comprise electrode, the shape of described electrode is that semicircle is spherical, power supply is connected to described electrode by cable, described electrode is molybdenum electrode, described base part is provided with watercooling jacket, described watercooling jacket is connected by silver strip with between electrode, device for detecting temperature is provided with at cooling water outlet, in melting furnaces operation watch-keeping cubicle, be also provided with warning device, the surface current density of described electrode is evenly distributed, and described electrode is that 99.96% Mo is made.
Present invention also offers a kind of silicate glass containing boron and aluminium without alkali melting furnaces with this heating electrode, comprise melting furnaces main body, described melting furnaces main body is melting end, multiple heating electrode is installed at the bottom of the pond of described melting end, described heating electrode comprises electrode, the shape of described electrode is that semicircle is spherical, power supply is connected to described electrode by cable, described electrode is molybdenum electrode, described base part is provided with watercooling jacket, described watercooling jacket is connected by silver strip with between electrode, device for detecting temperature is provided with at cooling water outlet, also warning device is provided with in melting furnaces operation watch-keeping cubicle, the surface current density of described electrode is evenly distributed, described electrode is that 99.96% Mo is made.
As the preferred technical solution of the present invention, described melt portions is charging opening side region, middle section and dog-hole side region, each region is equipped with 2 ~ 4 pairs of heating electrodes, and described heating electrode is arranged symmetrically with along described melting furnaces main center line, the electrical heating power of the heating electrode of described charging opening side region, middle section and dog-hole side region individually sets and adjusts, and is set as constant dc power control pattern or Given current controller pattern; The pond bottom electrode brick installing the melting end of heating electrode adopts the high zirconia block that resistance to glass metal erosional competency is strong.
As a further improvement on the present invention, the breastwork of described melting end both sides is provided with total oxygen and burns rifle, every pleurobranch wall is provided with total oxygen burning rifle 1-6 and props up, and both sides total oxygen burns rifle Heterogeneous Permutation, and the gable wall or arch top of charging opening side region are provided with 1-2 flue.
Silicate glass containing boron and aluminium without alkali melting furnaces of the present invention, heating electrode be at the bottom of the melting end pond being located at melting furnaces main body on, object is the temperature in order to improve bottom glass liquid, improves the convection current of glass metal, reduce melting end upper space temperature as much as possible, reduce the volatilization of boron.For the temperature of balanced melt portion upper space, meet glass melting needs, the breastwork of melting end both sides is provided with total oxygen and burns rifle, both sides total oxygen burns rifle Heterogeneous Permutation, avoid colliding burning and flame, increase port coverage, the arranging of flue can discharge the waste gas that flame produces.Electricity fusing-aid of the present invention is owing to improve bottom glass liquid temp, glass metal is accelerated the erosion of refractory materials, for overcoming the shortening of the bad and melting furnace life-span of glass that refractory corrosion brings, the pond bottom electrode brick installing heating electrode adopts the high zirconia block of resistance to glass metal erosional competency Strong oxdiative zirconium content about 95%.
The invention has the beneficial effects as follows: compared with the electrode of prior art, first, the electrode of silicate glass containing boron and aluminium without alkali melting furnaces is made up of 99.96% Mo, fusing point is up to 2620 DEG C, be particularly suitable for the requirement of infusibility silicate glass containing boron and aluminium without alkali high temperature melting, and can not pollute glass.The second, the electrode be located at the bottom of melting end pond is molybdenum electrode, and molybdenum electrode is that semicircle is spherical, semicircle sphere pole Mo used is few, can reduce costs, and semicircle spherical molybdenum electrode heat resistanceheat resistant vibrations performance is good, can not rupture, guarantee the effect that can play electricity fusing-aid within the whole kiln phase.The phenomenon of rupture as stick electrode can not be there is, thus do not need power failure to cut off the water jacking in stove, avoid the impact on fusing.3rd, the surface current density of the spherical molybdenum electrode of semicircle is evenly distributed, there will not be local current densities to transfinite and occur fine discharge to electrode cause damage, produce bubble.4th, electrode is provided with watercooling jacket, and coolant water temperature has monitoring device and warning device, and coolant water temperature can effectively control, good cooling results, effectively can extend electrode life.5th, be connected by silver strip between watercooling jacket with electrode, guarantee that contact is good.6th, the pond bottom electrode brick installing heating electrode adopts the high zirconia block of resistance to glass metal erosional competency Strong oxdiative zirconium content about 95%, and the glass that refractory corrosion can be avoided to bring is bad, extends the life-span of melting furnaces.
Silicate glass containing boron and aluminium without alkali melting furnaces of the present invention, the electrode be located at the bottom of melting end pond is molybdenum electrode, and molybdenum electrode is that semicircle is spherical, long service life, can use, avoid electrode damage on the impact of glass melting within the whole melting furnaces cycle, and Mo used is few, can reduce costs.
Accompanying drawing explanation
Fig. 1 is the structural representation of melting furnaces main body of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the structural representation of heating electrode of the present invention;
Wherein, 1-melting furnaces main body, 2-electrode, 3-cable, 4-watercooling jacket, 5-silver strip, 6-device for detecting temperature, 7-charging opening side region, 8-middle section, 9-dog-hole side region, 10-total oxygen burns rifle, 11-flue.
Embodiment
The preferred technical solution of the present invention is described in detail below in conjunction with accompanying drawing.
As shown in the figure, silicate glass containing boron and aluminium without alkali melting furnaces of the present invention, comprise melting furnaces main body 1, described melting furnaces main body 1 is melting end, multiple heating electrode is installed at the bottom of described melting end pond, described heating electrode comprises electrode 2, the shape of described electrode 2 is that semicircle is spherical, power supply is connected to described electrode 2 by cable 3, described electrode 2 is molybdenum electrode, watercooling jacket 4 is provided with below described electrode 2, described watercooling jacket 4 is connected by silver strip 5 with between electrode 2, device for detecting temperature 6 is provided with at cooling water outlet, also warning device is provided with in melting furnaces operation watch-keeping cubicle, the surface current density of described electrode 2 is evenly distributed, described electrode 2 is that 99.96% Mo is made, described melt portions is charging opening side region 7, middle section 8 and dog-hole side region 9, each region is equipped with 2 ~ 4 pairs of heating electrodes, and described heating electrode is arranged symmetrically with along described melting furnaces main body 1 medullary ray, the electrical heating power of the heating electrode of described charging opening side region 7, middle section 8 and dog-hole side region 9 individually sets and adjusts, and is set as constant dc power control pattern or Given current controller pattern, the pond bottom electrode brick installing the melting end of heating electrode adopts the high zirconia block that resistance to glass metal erosional competency is strong, the breastwork of described melting end both sides is provided with total oxygen and burns rifle 10, every pleurobranch wall is provided with 1-6 and props up total oxygen burning rifle 10, and both sides total oxygen burns rifle 10 Heterogeneous Permutation, and the gable wall or arch top of charging opening side region 7 are provided with 1-2 flue 11.
Electrode of the present invention is provided with watercooling jacket, the material of watercooling jacket is heat-resistance stainless steel, water coolant is cyclic softening water, the flow controlling water inlet I or water outlet O guarantees the cooling performance of electrode, cooling water outlet has device for detecting temperature and warning device, warning device is arranged on melting furnaces operation watch-keeping cubicle, so that operator's Timeliness coverage water temperature exceeds standard and regulates water temperature in time, cooling water outlet temperature controls within 45 DEG C.The electrical heating power of charging opening side region, middle section and dog-hole side region heating electrode individually sets and adjusts, and is set as constant dc power control pattern or Given current controller pattern, can meet the difference in functionality needs of melting end different positions.Heating electrode, to molten glass direct heating, can improve the temperature of molten glass, improves the convection current of glass metal, accelerates the fusing of admixtion, the clarification and homogenization of glass metal, not only can improve the output of melting furnaces, and can improve the quality of glass metal.Electricity fusing-aid heating both can be used separately, was all-electric melting, also can heats to coordinate with flame and use, electricity fusing-aid heating and flame heating can complement one another, and regulate separately, add the operability of melting furnaces, such as, can increase separately or reduce the consumption of electricity or fuel as required.
Heating electrode of the present invention and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode, heating electrode be at the bottom of the melting end pond being located at melting furnaces main body on, object is the temperature in order to improve bottom glass liquid, improve the convection current of glass metal, reduce melting end upper space temperature as much as possible, reduce the volatilization of boron.For the temperature of balanced melt portion upper space, meet glass melting needs, the breastwork of melting end both sides is provided with total oxygen and burns rifle, both sides total oxygen burns rifle Heterogeneous Permutation, avoids colliding burning and flame, increases port coverage.The arranging of flue can discharge the waste gas that flame produces.Electricity fusing-aid of the present invention is owing to improve bottom glass liquid temp, glass metal is accelerated the erosion of refractory materials, for overcoming the shortening of the bad and melting furnace life-span of glass that refractory corrosion brings, the pond bottom electrode brick installing heating electrode adopts the high zirconia block of resistance to glass metal erosional competency Strong oxdiative zirconium content about 95%.
The invention has the beneficial effects as follows: compared with the electrode of prior art, first, the electrode of silicate glass containing boron and aluminium without alkali melting furnaces is made up of 99.96% Mo, fusing point is up to 2620 DEG C, be particularly suitable for the requirement of infusibility silicate glass containing boron and aluminium without alkali high temperature melting, and can not pollute glass.The second, the electrode be located at the bottom of melting end pond is molybdenum electrode, and the shape of molybdenum electrode is that semicircle is spherical, semicircle sphere pole Mo used is few, can reduce costs, and semicircle spherical molybdenum electrode heat resistanceheat resistant vibrations performance is good, can not rupture, guarantee the effect that can play electricity fusing-aid within the whole kiln phase.The phenomenon of rupture as stick electrode can not be there is, thus do not need power failure to cut off the water jacking in stove, avoid the impact on fusing.3rd, the surface current density of the spherical molybdenum electrode of semicircle is evenly distributed, there will not be local current densities to transfinite and occur fine discharge to electrode cause damage, produce bubble, the maximized surface electric current of electrode can reach 1 ~ 3A/cm2.4th, electrode is provided with watercooling jacket, and coolant water temperature has monitoring device and warning device, and coolant water temperature can effectively control, good cooling results, effectively can extend electrode life.5th, be connected by silver strip between watercooling jacket with electrode, guarantee that contact is good.6th, the pond bottom electrode brick installing heating electrode adopts the high zirconia block of resistance to glass metal erosional competency Strong oxdiative zirconium content about 95%, and the glass that refractory corrosion can be avoided to bring is bad, extends the life-span of melting furnaces.
Heating electrode of the present invention and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode, the electrode be located at the bottom of melting end pond is molybdenum electrode, molybdenum electrode is that semicircle is spherical, has simple structure, is easy to realize, and is conducive to the thermo-efficiency, the raising glass quality that improve glass melter, features such as using can be coordinated with flame, long service life, can use, avoid electrode damage on the impact of glass melting within the whole melting furnaces cycle, and Mo used is few, can reduce costs.
Above-described embodiment is only used for the silicate glass containing boron and aluminium without alkali melting furnaces further illustrating heating electrode of the present invention and have this heating electrode and the heating electrode used; but the present invention is not limited to above-described embodiment; every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all fall into the protection domain of technical solution of the present invention.
Claims (7)
1. a heating electrode, it is characterized in that: comprise electrode (2), power supply is connected to described electrode (2) by cable (3), described electrode is molybdenum electrode, described electrode (2) below is provided with watercooling jacket (4), be connected by silver strip (5) between described watercooling jacket (4) with electrode (2), the shape of described electrode (2) is that semicircle is spherical.
2. heating electrode as claimed in claim 1, it is characterized in that: the surface current density of described electrode (2) is evenly distributed, described electrode (2) is that 99.96% Mo is made.
3. silicate glass containing boron and aluminium without alkali melting furnaces, it is characterized in that: comprise melting furnaces main body (1), described melting furnaces main body (1) is melting end, multiple heating electrode is installed at the bottom of the pond of described melting end, described heating electrode comprises electrode (2), power supply is connected to described electrode (2) by cable (3), described electrode is molybdenum electrode, described electrode (2) below is provided with watercooling jacket (4), be connected by silver strip (5) between described watercooling jacket (4) with electrode (2), device for detecting temperature (6) is provided with at cooling water outlet, also warning device is provided with in melting furnaces operation watch-keeping cubicle, the shape of described electrode (2) is that semicircle is spherical, be made up of 99.96% Mo, the surface current density of described electrode (2) is evenly distributed, the pond bottom electrode brick installing the melting end of heating electrode adopts the high zirconia block that resistance to glass metal erosional competency is strong.
4. silicate glass containing boron and aluminium without alkali melting furnaces as claimed in claim 3, it is characterized in that: described melt portions is charging opening side region (7), middle section (8) and dog-hole side region (9), each region is equipped with 2 ~ 4 pairs of heating electrodes, and described heating electrode is arranged symmetrically with along described melting furnaces main body (1) medullary ray.
5. silicate glass containing boron and aluminium without alkali melting furnaces as claimed in claim 4, it is characterized in that: the electrical heating power of the heating electrode of described charging opening side region (7), middle section (8) and dog-hole side region (9) individually sets and adjusts, and is set as constant dc power control pattern or Given current controller pattern.
6. the silicate glass containing boron and aluminium without alkali melting furnaces any one of claim 3 to 5 as described in claim, it is characterized in that: on the breastwork of described melting end both sides, be provided with total oxygen burn rifle (10), every pleurobranch wall is provided with total oxygen burning rifle (10) 1-6 and props up, and both sides total oxygen burns rifle (10) Heterogeneous Permutation.
7. silicate glass containing boron and aluminium without alkali melting furnaces as claimed in claim 6, is characterized in that: on the gable wall or arch top of charging opening side region (7), be provided with 1-2 flue (11).
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| CN201210360158.0A CN102910799B (en) | 2012-09-25 | 2012-09-25 | Heating electrode and there are the silicate glass containing boron and aluminium without alkali melting furnaces of this heating electrode |
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| CN111928658A (en) * | 2020-08-14 | 2020-11-13 | 蚌埠中光电科技有限公司 | High-temperature furnace for simulating electrode erosion experiment |
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| JPS565336A (en) * | 1979-06-21 | 1981-01-20 | Hoya Corp | Glass melting electrode |
| JPS6126519A (en) * | 1984-07-16 | 1986-02-05 | Toshiba Corp | Junction electrode for glass smelting |
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| US5125002A (en) * | 1991-01-07 | 1992-06-23 | Toledo Engineering Co., Inc. | Furnace electrode protector |
| CN2811290Y (en) * | 2005-06-09 | 2006-08-30 | 东华大学 | Electrode cooling water jacket for glass kiln |
| CN1944296A (en) * | 2005-09-19 | 2007-04-11 | 肖特股份有限公司 | Glass fused electrode and method for fusing glass or glass ceramic |
| CN101405231A (en) * | 2006-01-24 | 2009-04-08 | 肖特股份公司 | Method for temperature manipulation of a melt |
| CN101838098A (en) * | 2010-03-30 | 2010-09-22 | 株洲旗滨集团股份有限公司 | Novel oxy-fuel combustion glass melting furnace |
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Application publication date: 20130206 Assignee: Sichuan Gaosheng pharmaceutical packaging material technology Co.,Ltd. Assignor: TUNGHSU GROUP Co.,Ltd. Contract record no.: X2021990000507 Denomination of invention: Heating electrode and alkali free boroaluminosilicate glass furnace with the heating electrode Granted publication date: 20160120 License type: Common License Record date: 20210818 |
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Application publication date: 20130206 Assignee: Qingdao fusion Photoelectric Technology Co.,Ltd. Assignor: TUNGHSU GROUP Co.,Ltd. Contract record no.: X2022110000014 Denomination of invention: Heating electrode and alkali-free boro-aluminosilicate glass melting furnace having the same Granted publication date: 20160120 License type: Common License Record date: 20220812 |