CN209759290U - hydroxyl and impurity removing device for quartz continuous melting furnace - Google Patents
hydroxyl and impurity removing device for quartz continuous melting furnace Download PDFInfo
- Publication number
- CN209759290U CN209759290U CN201920321822.8U CN201920321822U CN209759290U CN 209759290 U CN209759290 U CN 209759290U CN 201920321822 U CN201920321822 U CN 201920321822U CN 209759290 U CN209759290 U CN 209759290U
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- tungsten
- upper cover
- stepping motor
- continuous melting
- melting furnace
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Abstract
The utility model discloses a device for removing hydroxyl and impurities from a quartz continuous melting furnace, which comprises an upper cover (1), wherein a through hole is arranged in the middle of the upper cover (1) and is used for accommodating a tungsten-molybdenum tube (2); a tungsten-rhenium thermocouple (3) is coaxially arranged in the tungsten-molybdenum tube (2); the upper cover (1) is also provided with a stepping motor (4), and the stepping motor (4) is connected to the tungsten-molybdenum tube (2). The utility model discloses can effectively get rid of because of production technology and material own brought hydroxyl, bubble, and easy operation, it is fast to take effect, improves production efficiency and product quality greatly in the application.
Description
Technical Field
the utility model relates to a quartz capsule manufacture equipment particularly, is a quartzy continuous melting stove removes hydroxyl, impurity device.
Background
Silica is a naturally occurring mineral, which is present in certain amounts due to the conditions of natural formation, other substances, collectively called impurities, which, although a part is removed by physical and chemical methods during the manufacture of quartz sand, are more or less not removed, and which during the manufacture of quartz glass seriously affect its intrinsic and extrinsic qualities:
1. The quartz glass melted by a continuous melting furnace with hydrogen as protective gas can form a certain amount of hydroxyl in the melting process due to the existence of oxygen of quartz sand, and although the hydroxyl of the thin-wall quartz tube can be removed by heating to 1050 ℃ in a vacuum dehydroxylation mode and removing more than 80% of the hydroxyl after 3 hours, the production cost is increased.
2. the external quality mostly refers to the appearance defects caused by bubbles, gas lines and specification ranges, the defects of the specification can be solved by artificial control due to improper manufacturing processes, and the formation of the bubbles and the gas lines is mostly caused by the internal quality of the quartz sand, due to the existence of some low-melting-point substances, for example: during the smelting process of potassium, sodium, lithium and quartz sand in a continuous smelting furnace, low-melting-point impurities are gasified at 800-1400 ℃, the gasified impurities cannot be discharged due to self buoyancy because the specific gravity of the gasified impurities is greater than the atmospheric pressure, and a large amount of impurity gases are gathered together in the quartz smelting process and are mixed in liquid quartz solution to form gas lines or bubbles.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a quartzy continuous melting stove that can effectively get rid of because of production technology and material own brought hydroxyl, bubble removes hydroxyl, impurity device.
The utility model discloses a following technical means realize: a device for removing hydroxyl and impurities from a quartz continuous melting furnace comprises an upper cover, wherein a through hole is formed in the middle of the upper cover and used for accommodating a tungsten-molybdenum tube; a tungsten-rhenium thermocouple is coaxially arranged in the tungsten-molybdenum tube; the upper cover is also provided with a stepping motor which is connected with the tungsten-molybdenum tube.
The tungsten-rhenium thermocouple is used for monitoring the temperature of the blowing height and transmitting the temperature to the controller; the stepping motor is connected with the controller and receives instructions to move upwards or downwards.
And the side surface of the bottom of the tungsten-molybdenum tube is uniformly provided with air outlets along the circumferential direction of the tube body. Used for protecting the tungsten-rhenium thermocouple and conveying gas to the 1400-degree material layer.
The upper cover is of a 20866model and is arranged at the top of the tungsten crucible, and the upper cover fixes the bracket and seals the tungsten tube.
A mixed gas inlet is formed in one side of the tungsten-molybdenum pipe; the tungsten-molybdenum pipe and the mixed gas inlet are perpendicular to each other. The mixed gas inlet is used for inputting hydrogen-helium mixed gas to the material layer with the temperature of more than 1400 ℃.
The upper cover is also provided with a bracket, and the stepping motor is arranged on the bracket. And the stepping motor is fixed to ensure that the stepping motor drives the tungsten tube to move up and down.
The furnace temperature control device is characterized by also comprising a controller, wherein the stepping motor and the tungsten-rhenium thermocouple are electrically connected to the controller, the controller sets a temperature value of 1400 ℃ for avoiding furnace temperature change, receives a thermocouple temperature signal, and instructs the stepping motor to move upwards or downwards when the temperature value is higher or lower than 1400 ℃, so that the aim of blowing air to an area above 1400 ℃ is fulfilled.
The utility model discloses a tungsten rhenium thermocouple that the setting can insert the stove and the thermocouple can be along with step motor makes linear motion from top to bottom, directly utilizes gaseous buoyancy accurately with the gasification ion of potassium, sodium, lithium in the 1400 ℃ layer and the free oxygen atom of high temperature get rid of.
The utility model discloses can effectively get rid of because of production technology and material own brought hydroxyl, bubble, and easy operation, it is fast to take effect, improves production efficiency and product quality greatly in the application.
Drawings
Fig. 1 is a schematic structural view of the present invention;
Fig. 2 is an enlarged view of a portion D in fig. 1.
Wherein, the device comprises 1-an upper cover, 2-a tungsten-molybdenum tube, 3-a tungsten-rhenium thermocouple, 4-a stepping motor, 5-an air outlet, 6-a tungsten crucible, 7-a bracket and 8-a controller.
Detailed Description
The invention is described in further detail below with reference to the drawings in the specification:
Example (b):
As shown in fig. 1, the utility model relates to a hydroxyl and impurity removing device for a quartz continuous melting furnace, which comprises an upper cover 1, wherein a through hole is arranged in the middle of the upper cover 1 and is used for accommodating a tungsten-molybdenum tube 2; a tungsten-rhenium thermocouple 3 is coaxially arranged inside the tungsten-molybdenum tube 2; the tungsten-molybdenum tube with the thermocouple extends into the furnace body, the upper cover 1 is also provided with a stepping motor 4, and the stepping motor 4 is connected with the tungsten-molybdenum tube 2.
Specifically, the upper cover 1 is of a 20866model and is arranged at the top of the tungsten crucible 6, and a mixed gas inlet 9 is arranged at one side of the tungsten-molybdenum tube 2; the tungsten-molybdenum tube 2 and the mixed gas inlet 9 are arranged perpendicular to each other. Still be equipped with support 7 on the upper cover 1, step motor 4 sets up on support 7, and the circumference direction of 2 bottom sides of tungsten molybdenum tube along the body evenly arranges venthole 5.
The utility model discloses still be equipped with controller 8, step motor 4, tungsten rhenium thermocouple 3 electricity all connect in controller 8.
The upper furnace cover of the quartz continuous melting furnace is generally evenly provided with at least 6 holes which are mainly used for facilitating the treatment of the occurrence of cover bonding in the production process, the daily use is 3, two blanking holes are used for raw material input, 1 is used for exhaust, the device can fully utilize the residual holes, and 2 or 3 blowing-up tubes with thermocouples are inserted into the raw materials.
From the view of the furnace body structure of the quartz continuous melting furnace, the steps from the input of quartz sand to the melting are divided into three stages:
1. raw material zone of upper layer: the quartz sand raw material is put into the furnace at normal temperature, and continuously sinks along with the continuous discharge of a furnace opening, under the condition that the furnace temperature is not changed, the more the time for the quartz sand raw material to stay in the furnace is, the higher the temperature is, and the deformation point of the quartz is about 1450 ℃, so that the quartz sand raw material is determined to be a raw material area at 0-1400 ℃. (i.e., region C in the figure);
2. The middle part is a semi-molten state area; region B in the figure;
3. The bottom is a quartz liquid area; region a in the figure.
the working steps and the principle are as follows:
firstly, a normal-temperature quartz sand raw material is put in from an input port, low-melting-point substances (potassium, sodium and lithium) in the quartz sand start to be gasified and oxygen atoms start to be dissociated when the temperature gradually rises to 800-1400 ℃, hydrogen-helium mixed gas is input into a material layer of the quartz sand from an input port, and the gasified potassium, sodium and lithium ions and the dissociated oxygen atoms are taken out of a furnace body by utilizing the floating force of hydrogen and helium, so that the existence of bubbles and hydroxyl in liquid quartz sand is reduced.
As the low-melting point substances of potassium, sodium and lithium have the gasification temperature of 800-1400 ℃, are positioned at the upper part of the continuous melting furnace, and the deformation point of the quartz sand is 1450-1650 ℃, the position of the blown gas is kept at the upper 1400 ℃, which can be adjusted according to the temperature resistance of the raw materials, if the position is too low, the gasification of the quartz material is affected, and if the position is too high, the incompletely gasified impurities are left in the quartz material liquid.
Hydrogen-helium mixed gas
After the mixed gas of hydrogen and helium is introduced, the hydrogen has the function of oxidizing and reducing the tungsten crucible. Meanwhile, the hydrogen-helium mixed gas penetrates into the 1400-degree material layer, and the buoyancy of the hydrogen and helium can lead gasified ions of potassium, sodium and lithium between 800 and 1400 degrees and free oxygen atoms in a high-temperature state to be taken out of the continuous melting furnace through the upper exhaust port.
Tungsten-rhenium thermocouple and automatic lifting
After the tungsten-rhenium thermocouple detects the temperature, a temperature signal is transmitted to the controller, and after the controller receives the signal, if the temperature is higher than 1400 ℃, the stepping motor is started to drive the tungsten-molybdenum tube to automatically rise and stop when the temperature rises to 1400 ℃; if the temperature is lower than 1400 ℃, the temperature of the raw material is decreased to 1400 ℃ along with the downward decrease of the temperature. Because the melting quartz tube is influenced by productivity and raw materials, the furnace temperature can change, the softening point can rise or fall, in order to keep the accuracy of the blowing point, a thermocouple is additionally arranged, the temperature change is sensed and is transmitted to a controller through a compensating lead, and the controller instructs a stepping motor to automatically rise and fall. Directly utilizes gas buoyancy to remove gasified ions of potassium, sodium and lithium and high-temperature free oxygen atoms.
The utility model discloses can effectively get rid of because of production technology and material own brought hydroxyl, bubble, and easy operation, it is fast to take effect, improves production efficiency and product quality greatly in the application.
Claims (6)
1. The utility model provides a quartzy continuous melting stove removes hydroxyl, impurity device which characterized in that: the tungsten-molybdenum tube comprises an upper cover (1), wherein a through hole is formed in the middle of the upper cover (1) and used for accommodating a tungsten-molybdenum tube (2); a tungsten-rhenium thermocouple (3) is coaxially arranged in the tungsten-molybdenum tube (2); the upper cover (1) is also provided with a stepping motor (4), and the stepping motor (4) is connected to the tungsten-molybdenum tube (2).
2. The apparatus for removing hydroxyl radicals and impurities in a quartz continuous melting furnace according to claim 1, wherein: and air outlet holes (5) are uniformly distributed on the side surface of the bottom of the tungsten-molybdenum tube (2) along the circumferential direction of the tube body.
3. the apparatus for removing hydroxyl radicals and impurities in a quartz continuous melting furnace according to claim 1, wherein: the upper cover (1) is of a 20866model and is arranged at the top of the tungsten crucible (6).
4. The apparatus for removing hydroxyl radicals and impurities in a quartz continuous melting furnace according to claim 1, wherein: a mixed gas inlet (9) is formed in one side of the tungsten-molybdenum tube (2); the tungsten-molybdenum pipe (2) and the mixed gas inlet (9) are arranged vertically.
5. The apparatus for removing hydroxyl radicals and impurities in a quartz continuous melting furnace according to claim 4, wherein: the upper cover (1) is also provided with a bracket (7), and the stepping motor (4) is arranged on the bracket (7).
6. The apparatus for removing hydroxyl radicals and impurities in a quartz continuous melting furnace according to any one of claims 1 to 5, wherein: the stepping motor is characterized by also comprising a controller (8), wherein the stepping motor (4) and the tungsten-rhenium thermocouple (3) are electrically connected to the controller (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920321822.8U CN209759290U (en) | 2019-03-13 | 2019-03-13 | hydroxyl and impurity removing device for quartz continuous melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920321822.8U CN209759290U (en) | 2019-03-13 | 2019-03-13 | hydroxyl and impurity removing device for quartz continuous melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209759290U true CN209759290U (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920321822.8U Expired - Fee Related CN209759290U (en) | 2019-03-13 | 2019-03-13 | hydroxyl and impurity removing device for quartz continuous melting furnace |
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| CN (1) | CN209759290U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912216A (en) * | 2020-06-24 | 2020-11-10 | 中国科学院微电子研究所 | Drying mechanism and quartz tube cleaning device with same |
| CN111977941A (en) * | 2020-09-24 | 2020-11-24 | 连云港三明石英制品有限公司 | Hydroxyl and impurity removing device for quartz continuous melting furnace |
-
2019
- 2019-03-13 CN CN201920321822.8U patent/CN209759290U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912216A (en) * | 2020-06-24 | 2020-11-10 | 中国科学院微电子研究所 | Drying mechanism and quartz tube cleaning device with same |
| CN111977941A (en) * | 2020-09-24 | 2020-11-24 | 连云港三明石英制品有限公司 | Hydroxyl and impurity removing device for quartz continuous melting furnace |
| CN111977941B (en) * | 2020-09-24 | 2024-04-26 | 连云港三明石英制品有限公司 | Device for removing hydroxyl and impurities in quartz continuous melting furnace |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |