Optical glass fining tank

Abstract

The present application relates to optical glass production technical field, disclose a kind of optical glass clarifying tank, including clarification passage, first electrode and second electrode, first electrode is fixedly installed at one end of clarification passage, and second electrode is fixedly installed at the other end of clarification passage, when first electrode and second electrode are powered, for heating glass melt glass liquid located in the inside of clarification passage, the outside of clarification passage is paved with the corrosion-resistant material layer that wraps clarification passage, the outside of corrosion-resistant material layer is provided with the heat-insulating material layer that wraps in the outside of corrosion-resistant material layer;The present application guarantees to adopt electrode heating mode, high thermal efficiency, can heat glass to higher temperature, in the same direction of clarification tank glass liquid flow direction and electrode current direction, make glass liquid fully heated, reduce the blind area of heating, while electrode and glass liquid contact part adopt platinum material, the rest part adopts nickel material, greatly reduce the platinum amount, reduce the construction cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical glass production, in particular to an optical glass refining tank. BACKGROUND

[0002] In the smelting production process of optical glass, a large amount of bubbles will be generated through a series of chemical reactions and volatilization of volatile components. If not eliminated, the bubbles will remain in the glass, thereby affecting the quality of the optical glass. The bubbles can be eliminated by raising the temperature of the glass to above 1450 DEG C. The elimination of the bubbles is generally carried out in a refining tank. Therefore, the refining tank is a key equipment in the production of optical glass.

[0003] The heating methods commonly used in the refining tank include flame heating, molybdenum electrode heating, and platinum gold channel heating. The flame heating method usually heats the glass by burning combustible gas on the surface of the glass, and heats the internal glass through heat transfer. This results in uneven heating of the glass, and the glass refining effect at the bottom of the refining tank is not ideal. In addition, the flame heating method produces a large amount of combustion waste gas, thereby increasing environmental pollution. The molybdenum electrode heating method heats the glass by arranging a plurality of molybdenum electrodes in the middle of the refining tank. The molybdenum electrodes are arranged vertically to the flow direction of the glass. Therefore, the current density is low near the two sides of the electrodes, and the heating is uneven. In addition, the molybdenum electrodes are easily oxidized. Therefore, the molybdenum electrode heating method can only be used to produce glasses with reducing components, and the types of the produced glasses are limited. The platinum gold channel heating method uses silicon-carbon rods or silicon-molybdenum rods for radiation heating. The heating efficiency is relatively low, and the temperature of the refining tank cannot be raised to a high level. In addition, a large amount of platinum gold is required for the platinum gold channel, and the construction cost is high.

[0004] Therefore, it is necessary to select a reasonable heating method for the refining tank, use appropriate electrodes and arrangement methods, take into account the construction cost, and produce qualified optical glasses. SUMMARY

[0005] The present application aims to provide an optical glass refining tank to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme.

[0007] An optical glass refining tank comprises a refining channel, a first electrode, and a second electrode. The first electrode is fixedly installed at one end of the refining channel, and the second electrode is fixedly installed at the other end of the refining channel. When the first electrode and the second electrode are powered on, they are used to heat the glass melt in the refining channel. An erosion-resistant material layer is laid on the outside of the refining channel to wrap the refining channel. A heat preservation material layer is arranged on the outside of the erosion-resistant material layer to wrap the outside of the erosion-resistant material layer.

[0008] Preferably, one end of the refining channel is provided with a partition wall, and the partition wall is located at one side of the second electrode; a plurality of exhaust holes are formed in the sidewall of the refining channel, and the exhaust holes penetrate through the erosion-resistant material layer, the heat-insulating material layer and the outer side of the heat-insulating material layer.

[0009] Preferably, a plurality of platinum partition plates are fixedly connected to the inner wall of the refining channel.

[0010] Preferably, overflow holes are formed in the sidewall of the refining channel, and the overflow holes penetrate through the erosion-resistant material layer, the heat-insulating material layer and the outer side of the heat-insulating material layer.

[0011] Preferably, a connecting pipe is fixedly installed at one end of the refining channel, and the connecting pipe is located at one end of the second electrode.

[0012] Preferably, a riser is formed in the sidewall of the refining channel and close to the first electrode, and the sidewall of the riser is provided with an erosion-resistant material layer.

[0013] Preferably, the first electrode and the second electrode each comprise a platinum electrode column, a platinum sealing plate, a nickel electrode sheet, a fixing pin hole, a wiring hole and an electrode cooling pipe; the platinum electrode column is fixedly installed in the platinum sealing plate; the nickel electrode sheet is fixedly installed between one end of the platinum electrode column and one end of the platinum sealing plate, and the nickel electrode sheet is located at one side of the platinum sealing plate; and the electrode cooling pipe is installed in the middle part of the nickel electrode sheet.

[0014] Preferably, the fixing pin hole and the wiring hole are each formed in the end face of the nickel electrode sheet, and the wiring hole is located in the middle part of the nickel electrode sheet.

[0015] Preferably, the second electrode further comprises a first liquid flow hole, and the first liquid flow hole is formed in the end face of the platinum sealing plate comprised by the second electrode; one side of the first liquid flow hole is connected to the electrode cooling pipe.

[0016] Preferably, the platinum partition plate comprises a second liquid flow hole and a thermocouple; the second liquid flow hole is formed in the platinum partition plate; and the thermocouple is installed in the liquid flow hole.

[0017] The present application has at least the following advantages:

[0018] (1) The molten glass liquid flows into the refining pool through the riser, and the electrode is powered on to heat the glass liquid, and the electrode current is adjusted to raise the glass liquid to the refining temperature; a plurality of electrode columns are arranged on the electrode to increase the contact area between the electrode and the glass, so that the glass can be fully heated. The electrode heating mode is adopted, the heat efficiency is high, and the glass can be heated to a higher temperature;

[0019] (2) the cooling pipe on the electrode sheet of the scheme is connected with cooling water to cool the electrode sheet. The high-temperature gas is removed and the generated gas is discharged through the exhaust hole. The platinum partition plate is arranged to increase the flow path of the glass liquid and increase the residence time of the glass in the refining tank. The thermocouple connected to the platinum partition plate can monitor the temperature of the refining tank. The glass liquid in the refining tank is discharged through the first liquid flow hole of the second electrode, flows into the subsequent process through the connecting pipe, and flows in the same direction as the electrode current, so that the glass liquid is fully heated and the heating blind area is reduced;

[0020] (3) the electrode of the scheme is made of platinum material in the contact part with the glass liquid, and the remaining part is made of nickel material, which greatly reduces the platinum consumption and the construction cost;

[0021] (4) the scheme is provided with a plurality of partition plates to increase the residence time of the glass in the refining tank, so that the glass liquid can be fully refined. The thermocouple connected to the partition plate can detect the temperature of the refining tank, which is convenient for adjusting the glass production process. The exhaust hole can be connected with high-temperature air to heat and warm up the refining tank. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor

[0023] Figure 1 the main body of the refining tank of the present application is shown in the figure;

[0024] Figure 2 the structure of the first electrode of the present application is shown in the figure;

[0025] Figure 3 the side view of the first electrode of the present application is shown in the figure;

[0026] Figure 4 the structure of the second electrode of the present application is shown in the figure;

[0027] Figure 5 the side view of the second electrode of the present application is shown in the figure;

[0028] Figure 6 the structure of the partition plate of the present application is shown in the figure;

[0029] Figure 7 the first electrode of the present application is shown in the figure;

[0030] Figure 8 the second electrode of the present application is shown in the figure.

[0031] The components represented by the numbers in the drawings are listed as follows:

[0032] 1, clarification channel; 10, riser; 11, connecting pipe; 2, first electrode; 21, platinum electrode column; 22, platinum sealing plate; 23, nickel electrode sheet; 24, fixing pin hole; 25, wiring hole; 26, electrode cooling pipe; 3, second electrode; 31, first liquid flow hole; 4, corrosion-resistant material layer; 5, heat-insulating material layer; 6, partition wall; 7, exhaust hole; 8, platinum partition plate; 81, second liquid flow hole; 82, thermocouple; 9, overflow hole. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] Please refer to Figures 1-8 The present application provides an optical glass clarification tank, which comprises a clarification channel 1, a first electrode 2 and a second electrode 3. The first electrode 2 is fixedly installed at one end of the clarification channel 1, and the second electrode 3 is fixedly installed at the other end of the clarification channel 1. When the first electrode 2 and the second electrode 3 are electrified, the glass melt in the clarification channel 1 is heated. The outer side of the clarification channel 1 is paved with a corrosion-resistant material layer 4 wrapping the clarification channel 1. The outer side of the corrosion-resistant material layer 4 is provided with a heat-insulating material layer 5 wrapping the outer side of the corrosion-resistant material layer 4.

[0035] It should be noted that the glass melt in the tank enters the clarification channel 1 through the riser 10. After the first electrode 2 and the second electrode 3 are electrified, the low-valence cation conductive property of the glass melt in the molten state at high temperature makes the glass melt itself heat up, the temperature rises to above 1450℃, the gas in the glass melt overflows, and the purpose of clarification is achieved. The clarified glass flows into the platinum connecting pipe 11 through the first liquid flow hole 31 provided on the second electrode 3, and then the subsequent production process is performed.

[0036] Preferably, the corrosion-resistant material layer 4 is made of high-zirconia refractory material, which is not easy to react with the glass melt and has strong corrosion resistance. Preferably, the heat-insulating material layer 5 is made of lightweight alumina brick material, which has good heat-insulating effect.

[0037] In an optional embodiment, a partition wall 6 is arranged at one end of the clarification channel 1, and the partition wall 6 is located at one side of the second electrode 3. A plurality of exhaust holes 7 are arranged in the side wall of the clarification channel 1, and the exhaust holes 7 penetrate through the corrosion-resistant material layer 4 and the heat-insulating material layer 5 to the outer side of the heat-insulating material layer 5.

[0038] It should be noted that the partition wall 6 can separate the clarifying tank from the subsequent production area to prevent mutual influence, and the partition wall 6 is preferably made of mullite. The exhaust hole 7 is arranged to enable the gas in the clarifying tank to be discharged from the clarifying tank; and in the early stage of production, high-temperature gas can be introduced through the exhaust hole 7 to heat the clarifying tank, so that the clarifying tank reaches a corresponding temperature before the electrode is powered on.

[0039] In an optional embodiment, the inner wall of the clarifying channel 1 is fixedly connected with a plurality of platinum partitions 8.

[0040] It should be noted that the plurality of platinum partitions 8 can increase the flow path of the glass liquid.

[0041] In an optional embodiment, the side wall of the clarifying channel 1 is provided with an overflow hole 9, and the overflow hole 9 penetrates through the erosion-resistant material layer 4 and the heat-insulating material layer 5 to the outside of the heat-insulating material layer 5.

[0042] It should be noted that when the glass liquid level is high, the excess glass liquid can be discharged from the clarifying tank through the overflow hole 9.

[0043] In an optional embodiment, one end of the clarifying channel 1 is fixedly provided with a connecting pipe 11, and the connecting pipe 11 is located at one end of the second electrode 3.

[0044] It should be noted that the glass at the end of the clarification flows into the platinum connecting pipe 11 through the first liquid flow hole 31 provided on the second electrode 3, which facilitates the subsequent production process.

[0045] In an optional embodiment, the side wall of the clarifying channel 1 is provided with a riser 10 near the first electrode 2, and the side wall of the riser 10 is provided with an erosion-resistant material layer 4.

[0046] It should be noted that the glass liquid in the melting tank can enter the clarifying channel 1 through the riser 10.

[0047] In an optional embodiment, the first electrode 2 and the second electrode 3 each include a platinum electrode column 21, a platinum sealing plate 22, a nickel electrode sheet 23, a fixed pin hole 24, a wiring hole 25, and an electrode cooling pipe 26. The platinum electrode column 21 is fixedly installed in the platinum sealing plate 22. The nickel electrode sheet 23 is fixedly installed between one end of the platinum electrode column 21 and one end of the platinum sealing plate 22, and the nickel electrode sheet 23 is located on one side of the platinum sealing plate 22. The electrode cooling pipe 26 is installed in the middle part of the nickel electrode sheet 23. The fixed pin hole 24 and the wiring hole 25 are both arranged on the end face of the nickel electrode sheet 23, and the wiring hole 25 is located in the middle part of the nickel electrode sheet 23.

[0048] It needs to be explained that the first electrode 2 and the second electrode 3 are made of platinum gold material, which has good stability at high temperature and is not easy to react with glass liquid, a plurality of platinum electrode columns 21 are arranged on the electrode to increase the contact area of the electrode and the glass liquid, so that the glass is fully heated, a platinum sealing plate 22 is arranged to prevent the glass liquid from flowing out of the refining tank through the electrode, a nickel electrode sheet 23 is connected to the platinum electrode, is fixed through a fixed pin hole 24, is connected to a lead wire through a wiring hole 25, and an electrode cooling pipe 26 is arranged on the nickel electrode sheet 23 to cool the electrode sheet and prevent the electrode sheet from being burnt out at high temperature.

[0049] In an optional embodiment, the second electrode 3 further comprises a first liquid flow hole 31, and the first liquid flow hole 31 is arranged on the end face of the platinum sealing plate 22 included in the second electrode 3, and one side of the first liquid flow hole 31 is connected with the electrode cooling pipe 26.

[0050] It needs to be explained that the first liquid flow hole 31 is arranged to facilitate the glass at the end of refining to flow into the platinum connecting pipe 11 through the first liquid flow hole 31 arranged on the second electrode 3.

[0051] In an optional embodiment, the platinum partition plate 8 comprises a second liquid flow hole 81 and a thermocouple 82, the second liquid flow hole 81 is arranged on the platinum partition plate 8, and the thermocouple 82 is arranged in the second liquid flow hole 81.

[0052] It needs to be explained that a plurality of platinum partition plates 8 are arranged to increase the flow path of the glass liquid, the second liquid flow hole 81 is arranged at the lower part of the platinum partition plate 8, so that the glass liquid is not blocked during the emptying process of the refining tank and is discharged clean; the thermocouple 82 is arranged on the platinum partition plate 8 to detect the temperature of the refining tank.

[0053] The working process and principle of the present application are as follows: before production, high-temperature gas is introduced into the refining tank through the exhaust hole 7 to increase the temperature of the refining tank to a certain temperature; then the melted glass liquid flows into the refining tank through the rising channel 10, the electrode is powered on to heat the glass liquid, and the current of the electrode is adjusted to increase the temperature of the glass liquid to the refining temperature, so that the electrode heating mode is adopted, the heat efficiency is high, and the glass can be heated to a higher temperature; a plurality of electrode columns are arranged on the electrode to increase the contact area of the electrode and the glass, so that the glass can be fully heated. At the same time, the cooling pipe on the electrode sheet is connected to cooling water to cool the electrode sheet. The high-temperature gas is removed, the gas generated during refining is discharged from the refining tank through the exhaust hole 7, the platinum partition plate 8 is arranged to increase the flow path of the glass liquid in the refining tank and increase the residence time of the glass in the refining tank; at the same time, the thermocouple 82 connected to the platinum partition plate 8 can monitor the temperature of the refining tank. The glass liquid at the end of refining flows out of the refining tank through the first liquid flow hole 31 on the second electrode 3 and flows into the subsequent process through the connecting pipe 11.

[0054] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0055] While the embodiments of the application have been shown and described herein, it is to be understood that the scope of the application, jointly pointed out in the appended claims, is not to be limited to the above-described embodiments but can be otherwise variously changed, modified, replaced, and altered within the principles and spirit of the present application.

Claims

1. An optical glass fining tank characterized in that: it comprises a fining channel, a first electrode and a second electrode, and a plurality of platinum partitions; the first electrode is fixedly installed at one end of the fining channel, and the second electrode is fixedly installed at the other end of the fining channel; the first electrode and the second electrode are used to heat the glass melt in the fining channel after being electrified; the first electrode and the second electrode each comprise a platinum electrode column, a platinum sealing plate, a nickel electrode sheet, a fixing pin hole, a wiring hole and an electrode cooling pipe, the platinum electrode column is fixedly installed in the platinum sealing plate, one end of the nickel electrode sheet is fixedly installed between one end of the platinum electrode column, and the nickel electrode sheet is located on one side of the platinum sealing plate, and the electrode cooling pipe is installed in the middle of the nickel electrode sheet; the fixing pin hole and the wiring hole are both formed on the end face of the nickel electrode sheet, and the wiring hole is located in the middle of the nickel electrode sheet; the second electrode further comprises a first liquid flow hole, and the first liquid flow hole is formed on the end face of the platinum sealing plate included in the second electrode, and one side of the first liquid flow hole is connected with the electrode cooling pipe; an erosion-resistant material layer wrapping the fining channel is laid on the outside of the fining channel; a heat-insulating material layer wrapping the outside of the erosion-resistant material layer is arranged on the outside of the erosion-resistant material layer; an ascending channel is formed on the side wall of the fining channel and close to the first electrode; the glass melt of the melting tank enters the fining channel through the ascending channel, and the glass melt itself generates heat by the low-valence cation conductive property in the molten state at high temperature after the first electrode and the second electrode are electrified, so that the temperature of the glass melt rises to above 1450℃, and the gas in the glass melt overflows; a plurality of exhaust holes are formed on the side wall of the fining channel, and the exhaust holes penetrate through the erosion-resistant material layer and the heat-insulating material layer to the outside of the heat-insulating material layer; the exhaust holes are used to pass high-temperature gas to heat the fining tank in the early stage of production, so that the fining tank reaches a corresponding temperature before the electrodes are electrified; meanwhile, after the electrodes are electrified to heat the glass melt, the high-temperature gas is removed, and the gas generated in the fining process is discharged from the fining tank through the exhaust holes; the platinum partitions are fixedly connected to the inner wall of the fining channel to increase the flow path of the glass melt; the platinum partitions each comprise a second liquid flow hole and a thermocouple, the second liquid flow hole is formed on the platinum partition to enable the glass melt to flow unobstructed during the emptying of the fining tank, and the thermocouple is installed in the second liquid flow hole to detect the temperature of the fining tank.

2. An optical glass fining tank according to claim 1, wherein: a partition wall is arranged at one end of the fining channel, and the partition wall is located on one side of the second electrode.

3. An optical glass fining tank according to claim 1, wherein: an overflow hole is formed on the side wall of the fining channel, and the overflow hole penetrates through the erosion-resistant material layer and the heat-insulating material layer to the outside of the heat-insulating material layer.

4. An optical glass fining tank according to claim 1, wherein: a connecting pipe is fixedly installed at one end of the fining channel, and the connecting pipe is located at one end of the second electrode.

5. An optical glass fining tank according to claim 1, wherein: an erosion-resistant material layer is arranged on the side wall of the ascending channel.

6. An optical glass fining tank according to claim 1, wherein: the heat-insulating material layer is made of lightweight alumina brick.

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