CN113248117B - Sealing method for side-inserted electrode of glass fiber electric melting furnace - Google Patents
Sealing method for side-inserted electrode of glass fiber electric melting furnace Download PDFInfo
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- CN113248117B CN113248117B CN202110512171.2A CN202110512171A CN113248117B CN 113248117 B CN113248117 B CN 113248117B CN 202110512171 A CN202110512171 A CN 202110512171A CN 113248117 B CN113248117 B CN 113248117B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
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Abstract
The invention discloses a sealing method of a side-inserted electrode of a glass fiber electric melting furnace, which comprises the following steps: plugging the electrode insertion hole by using a plugging component, and heating the electric melting furnace in a baking kiln after plugging; when the furnace temperature of the electric melting furnace is more than 400 ℃ of the softening point of the glass to be added, starting to add the glass, removing the plugging part, and installing a temporary water jacket in the electrode insertion hole; after the liquid level of the glass liquid in the electric melting furnace is higher than the electrode insertion holes, taking away the temporary water jacket, and measuring the temperature of the glass liquid through the electrode insertion holes; and when the measured temperature reaches a preset value, inserting the electrode and the permanent water jacket for installation. Through the arrangement of the temporary water jacket, a time for detecting the temperature and/or the state of the glass liquid is provided, the optimal time for inserting the electrode can be known better, and the occurrence of electrode fracture possibly caused by poor sealing in the prior art is avoided.
Description
Technical Field
The invention relates to the technical field of electrode sealing, in particular to a sealing method of a side-inserted electrode of a glass fiber electric melting furnace.
Background
The glass fiber electric melting furnace has small investment and flexible formula adjustment, and can provide a key platform for product research and development, so the glass fiber electric melting furnace is rapidly popularized in the industry in recent years. Be different from the fine unit kiln of traditional glass, electric melting furnace is because of the particularity of batch, and glass liquid temperature can reach 1600 ℃ (the fine kiln glass liquid temperature of traditional glass is 1450 ℃) in the production process, except that optimization and performance promotion on refractory material, as the only heating equipment of kiln, the normal use of molybdenum electrode is the key of the stable operation of kiln.
Because the general productivity of electric melting furnace all is less, for improving kiln melting ability and quality, the electrode is arranged and is adopted the side and insert the formula structure usually, but the problem that appears is that the electrode is sealed not as effectual as traditional unit kiln. The reason is that when the liquid level of the kiln is greater than the electrode insertion depth (the electrode depth is generally determined to be 80% of the final liquid level depth of the kiln) in the initial production stage of the traditional unit kiln, an operator can push the electrode into the kiln to retreat, seal and electrify the kiln for use, the electrode of the traditional glass fiber unit kiln is inserted from the bottom of the kiln, E glass which is easy to melt is reserved in an electrode hole before being extruded and ignited by the gravity of glass liquid in the kiln, and along with the pushing of the electrode, the glass liquid at the bottom of the kiln is quickly filled in a gap between the top of an electrode water jacket and a refractory material and then is condensed, so the electrode sealing is generally finished at one time, the effect is good, and the phenomenon of oxidation cannot occur.
However, the electrode of the electric melting furnace belongs to a side-inserted structure, and two prerequisites that the gravity of the glass liquid is extruded and E glass which is easy to melt is reserved in advance cannot be met, so that the operation when the electrode is installed at present is as follows:
in the kiln baking process, the electrodes and the water jacket are preassembled in place, the holes are temporarily blocked and sealed by hard refractory materials, and when the liquid level of glass in the kiln is higher than the electrode holes, temporary bricks are pushed into the kiln, and then the electrodes are installed. On one hand, the operation mode cannot visually see the backflow situation of the molten glass because the water jacket and the electrode are installed in advance, and cannot jack the control electrode into the optimal time, so that the molten glass cannot completely seal the gap between the electrode and the refractory material, and the occurrence of the situation of untight sealing and oxidation fracture of the electrode can be caused in the later period. In practical application, the operation mode is also verified to be infeasible, each electrode of the I2 # electric melting furnace only runs for more than three times in 1 year, operation difficulty is high, risks are high, the furnace cannot normally work due to too many continuous running, and great difficulty is brought to production.
The electrode jacking time of the operation mode depends on the experience of workers, and as mentioned above, if the time is not proper, the gap between the electrode and the refractory material cannot be completely sealed by molten glass, and the occurrence of the situation of untight sealing and oxidation fracture of the electrode can be caused in the later period; and because need in advance with electrode and water jacket preinstall in place, sheltered from the observation to the glass liquid level in the kiln, make the control to the liquid level of the glass liquid in the kiln not very accurate so, under this situation, probably can lead to the liquid level not to exceed the hole just insert the electrode, can make the electrode of inserting at this moment oxidized by the hot air in the kiln.
Therefore, how to provide a sealing method of a side insertion electrode, which can avoid the occurrence of oxidation fracture caused by the untight sealing of the side insertion electrode of the glass fiber electric melting furnace, becomes a technical problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In order to achieve the purpose, the invention provides a sealing method of a side-inserted electrode of a glass fiber electric melting furnace, which can provide a time for detecting the temperature and/or the state of glass liquid through the arrangement of a temporary water jacket, can better know the optimal time for inserting the electrode, and avoids the occurrence of electrode fracture possibly caused by poor sealing in the prior art.
The invention provides a sealing method of a side-inserted electrode of a glass fiber electric melting furnace, which comprises the following steps:
step 1: plugging the electrode insertion hole in the side of the electric melting furnace by using a plugging part, and then heating the electric melting furnace by baking the electric melting furnace;
and 2, step: when the furnace temperature of the electric melting furnace is more than 400 ℃ of the softening point of the glass to be added, starting to add the glass into the electric melting furnace, removing the plugging part, and installing a temporary water jacket in the electrode insertion hole;
and 3, step 3: after the liquid level of the glass liquid in the electric melting furnace is higher than the electrode insertion holes, taking away the temporary water jacket, and measuring the temperature of the glass liquid through the electrode insertion holes;
and 4, step 4: and when the measured temperature reaches a preset value, inserting the electrode and the permanent water jacket for installation.
Preferably, in the step 4, the preset value is a temperature higher than the softening point by 500-800 ℃.
Preferably, in the step 3, the temperature of the molten glass is measured by an infrared temperature detector.
Preferably, in the step 2, the addition of the glass is started when the furnace temperature reaches a temperature higher than the softening point by 500 to 800 ℃.
Preferably, the method for determining and comparing the liquid level of the molten glass and the height of the electrode insertion hole in step 3 is as follows:
the radius of the cavity of the electric furnace kiln and the height of the electrode insertion hole are measured, the volume of the molten glass can be calculated according to the mass of the added glass, and then the liquid level height of the molten glass in the cavity can be obtained so as to compare the two.
Preferably, the preset value is 1400 ℃.
Preferably, in the step 3, the temporary water jacket is removed when the liquid level of the glass liquid in the electric melting furnace is higher than 75mm of the electrode insertion hole.
Preferably, the temporary water jacket comprises a cylinder body with a cavity matched with the electrode insertion hole, and further comprises a water inlet pipe and a water outlet pipe which are respectively communicated with the cavity, and cooling water in the cavity is used for cooling the molten glass adjacent to the electrode insertion hole.
The sealing method of the side-inserted electrode of the glass fiber electric melting furnace provided by the invention has the following technical effects:
in the method, a temporary water jacket is introduced and used for cooling the molten glass near the electrode insertion hole to ensure that the temperature is reduced to be in a solid state; when the liquid level of the glass liquid is higher than the electrode insertion hole (the inserted electrode is prevented from being oxidized by hot air in the electric melting furnace), the temporary water jacket can be taken away, as mentioned above, the glass near the electrode insertion hole is solid by means of the cooling of the temporary water jacket, so that the liquid glass liquid can not flow outwards, at the moment, the temperature of the glass at the position can be detected at any time through the opened electrode insertion hole, and as the temperature of the glass at the position is in the rising process, when the temperature reaches a preset value, the temperature is generally higher than 500-800 ℃ of the softening point of the glass, the electrode and the permanent water jacket can be quickly inserted, at the moment, the liquidity of the glass liquid at the moment is better, the gap between the electrode and the refractory brick can be quickly filled, and further complete sealing is realized;
therefore, through the arrangement of the temporary water jacket, a time for detecting the temperature and/or the state of the glass liquid is provided, the optimal time for inserting the electrode can be better known, and the occurrence of electrode fracture possibly caused by poor sealing in the prior art is avoided; simultaneously, through the setting of this interim water jacket, can the visual observation glass liquid level be higher than the height of electrode insert hole, avoid the hot-air of kiln with the emergence of electrode oxidation condition, can play dual effect.
Preferably, the preset value is a temperature which is 500-800 ℃ higher than the softening point, and at the moment, the glass liquid has better fluidity and can quickly fill the gap between the electrode and the refractory brick.
Preferably, the temperature of the molten glass is measured by an infrared temperature detection device, so that the operation is convenient.
Preferably, the preset value is 1400 °, which is suitable for most of the melting of glass.
Drawings
FIG. 1 is a flow chart of the steps of the sealing method of the side-inserted electrode of the glass fiber electric melting furnace provided by the invention.
Detailed Description
Fig. 1 is a flow chart showing the steps of the sealing method of the side-inserted electrode of the glass fiber electric melting furnace provided by the invention.
With reference to fig. 1, the invention provides a sealing method for a side-inserted electrode of a glass fiber electric melting furnace, which comprises the following steps:
step 1: plugging an electrode insertion hole on the side surface of the electric melting furnace by using a plugging part, and then heating the electric melting furnace by baking the electric melting furnace;
step 2: when the furnace temperature of the electric melting furnace is more than 400 ℃ of the softening point of the glass to be added, starting to add the glass into the electric melting furnace, removing the plugging part, and installing a temporary water jacket in the electrode insertion hole;
and 3, step 3: after the liquid level of the glass liquid in the electric melting furnace is higher than the electrode insertion holes, taking away the temporary water jacket, and measuring the temperature of the glass liquid through the electrode insertion holes;
and 4, step 4: and when the measured temperature reaches a preset value, inserting the electrode and the permanent water jacket for installation.
In the method, a temporary water jacket is introduced and used for cooling the molten glass near the electrode insertion hole to ensure that the temperature is reduced to be in a solid state; when the liquid level of the glass liquid is higher than the electrode insertion hole (the inserted electrode is prevented from being oxidized by hot air in the electric melting furnace), the temporary water jacket can be taken away, as mentioned above, the glass near the electrode insertion hole is solid by means of cooling of the temporary water jacket, so that the liquid glass liquid cannot flow outwards, at the moment, the temperature of the glass at the position can be detected by the opened electrode insertion hole at any moment, and because the temperature of the glass at the position is in the rising process, when the temperature reaches a preset value, the temperature is generally higher than 500-800 ℃ of the softening point of the glass, the electrode and the permanent water jacket can be rapidly inserted, at the moment, the liquidity of the glass liquid at the moment is better, the gap between the electrode and the refractory brick can be rapidly filled, and complete sealing is further realized;
therefore, through the arrangement of the temporary water jacket, a time for detecting the temperature and/or the state of the glass liquid is provided, the optimal time for inserting the electrode can be better known, and the occurrence of electrode fracture possibly caused by poor sealing in the prior art is avoided; meanwhile, through the arrangement of the temporary water jacket, whether the liquid level of the glass is higher than the height of the electrode insertion hole or not can be visually observed, the occurrence of the oxidation condition of the electrodes by hot air of the kiln is avoided, and the dual effects can be achieved.
Wherein, in the step 4, the preset value is a temperature which is 500-800 ℃ higher than the softening point.
The preset value is a temperature which is 500-800 ℃ higher than the softening point, and the glass liquid has better fluidity and can quickly fill the gap between the electrode and the refractory brick.
Further, in step 3, the temperature of the molten glass may be measured by an infrared temperature detection device.
And the temperature of the glass metal is measured by adopting an infrared temperature detection device, so that the operation is convenient to realize.
In addition, in step 2, when the furnace temperature reaches a temperature higher than the softening point by 500 to 800 ℃, the addition of glass is started.
Further, the method for judging and comparing the liquid level of the glass liquid and the height of the electrode insertion hole in the step 3 is as follows:
the radius of the cavity of the electric furnace kiln and the height of the electrode insertion hole are measured, the volume of the molten glass can be calculated according to the mass of the added glass, and then the liquid level height of the molten glass in the cavity can be obtained so as to compare the two.
In one embodiment, the preset value is 1400 °.
The preset value of 1400 deg. is suitable for most of the melting of glass. Of course, the method is not limited to the above method and may be determined according to specific working conditions.
In addition, in step 3, when the liquid level of the glass liquid in the electric melting furnace is higher than 75mm of the electrode insertion hole, the temporary water jacket can be taken away.
Furthermore, the temporary water jacket comprises a cylinder body which is matched with the electrode insertion hole and provided with a cavity, a water inlet pipe and a water outlet pipe which are respectively communicated with the cavity, and cooling water in the cavity is used for cooling the molten glass close to the electrode insertion hole.
Claims (8)
1. A sealing method for a side-inserted electrode of a glass fiber electric melting furnace is characterized by comprising the following steps:
step 1: plugging the electrode insertion hole in the side of the electric melting furnace by using a plugging part, and then heating the electric melting furnace by baking the electric melting furnace;
step 2: when the furnace temperature of the electric melting furnace is more than 400 ℃ of the softening point of the glass to be added, starting to add the glass into the electric melting furnace, removing the plugging part, and installing a temporary water jacket in the electrode insertion hole;
and step 3: after the liquid level of the glass liquid in the electric melting furnace is higher than the electrode insertion holes, taking away the temporary water jacket, and measuring the temperature of the glass liquid through the electrode insertion holes;
and 4, step 4: and when the measured temperature reaches a preset value, inserting the electrode and the permanent water jacket for installation.
2. The method for sealing a side-inserted electrode of an electric glass fiber melting furnace according to claim 1, wherein in the step 4, the predetermined value is a temperature 500 to 800 ℃ higher than the softening point.
3. The method for sealing a side-inserted electrode of a glass fiber electric melting furnace as claimed in claim 1, wherein in the step 3, the temperature of the molten glass is detected by an infrared temperature detection device.
4. The method for sealing a side-inserted electrode of a glass fiber electric melting furnace as claimed in claim 1, wherein in the step 2, the addition of the glass is started when the furnace temperature reaches a temperature higher than the softening point by 500-800 ℃.
5. The method for sealing a side-inserted electrode of a glass fiber electric melting furnace according to claim 1, wherein the method for comparing the liquid level of the glass liquid with the height of the electrode insertion hole in step 3 is determined as follows:
the radius of the cavity of the electric furnace kiln and the height of the electrode insertion hole are measured, the volume of the molten glass can be calculated according to the mass of the added glass, and then the liquid level height of the molten glass in the cavity can be obtained so as to compare the two.
6. The method for sealing a side-inserted electrode of an electric glass fiber melting furnace according to claim 1, wherein the predetermined value is 1400 ℃.
7. The method for sealing a side-inserted electrode of a glass fiber electric melting furnace as claimed in claim 1, wherein in the step 3, the temporary water jacket is removed when the level of the glass liquid in the electric melting furnace is 75mm higher than the electrode insertion hole.
8. The method for sealing a side-inserted electrode of a glass fiber electric melting furnace according to claim 1, wherein the temporary water jacket comprises a cylinder body having a cavity matching the electrode insertion hole, and further comprises a water inlet pipe and a water outlet pipe respectively communicating with the cavity, and cooling water in the cavity is used for cooling the molten glass adjacent to the electrode insertion hole.
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