Long-life ceramic fiber molten slurry leading-out device

Abstract

The utility model discloses a long-life ceramic fiber molten slurry leading-out device which comprises a furnace shell, an outer pipe A is arranged on the inner side of the furnace shell, and before a smelting furnace is opened, a tungsten iridium flow opening is in threaded connection with an upper end cover of a cooling anti-oxidation body and then fixed to the lower portion of a furnace bottom plate. Raw materials are stacked on the flow port after the height of the flow port in the furnace is set to be about 250mm, a water inlet and a water outlet of the cooling anti-oxidation body are respectively connected with a water outlet and a water inlet of circulating cooling water, so that a nitrogen passage in an inner cavity of the flow port is smooth, particularly nitrogen around an iridium pipe orifice is sufficient, and oxide growth is better prevented; through protection of circulating cooling water and inert gas, the service life of the flow port is prolonged from forty days to sixty days or above, the growth speed of oxide in the flow port is reduced by 50% or above through improvement of the circulating cooling water and nitrogen, cleaning is needed once every eight hours originally, and cleaning is needed once every 24 hours now. And the total service life of the smelting furnace can be prolonged to more than 60 days.

Description

Technical Field

[0001] This utility model belongs to the technical field of long-life ceramic fiber slurry export device, specifically relating to a long-life ceramic fiber slurry export device. Background Technology

[0002] The long-life ceramic fiber slurry discharge device is a piece of equipment used for high-temperature molten material processing. It is mainly used to effectively discharge and cool the molten ceramic fiber slurry. The ceramic fiber production process is a process that uses a high-temperature resistance furnace or electric arc furnace to melt granular or powdered raw materials, and then uses high-speed air blowing or high-speed spinning to fiberize the flowing slurry.

[0003] Existing long-life ceramic fiber slurry discharge device technology has the following problems: 1. The slurry discharge device is a very important part. Currently, the slurry outlet commonly used in the industry for producing ordinary aluminosilicate ceramic fibers is mainly made of tungsten with an embedded iridium tube. Although tungsten itself can withstand high temperatures, with a melting point of 3410℃, oxidation begins at 300-500℃. As the production process proceeds, the oxidation rate of tungsten accelerates significantly under high-temperature conditions. As the oxide layer gradually grows larger, it must be cleaned regularly. Over time, the growth rate of the oxide layer increases, and when it reaches a certain extent, the tungsten outlet becomes blocked. The traditional tungsten-iridium inlets are mainly designed for aluminosilicate ceramic fibers, with a molten slurry temperature of around 2000℃. However, when producing soluble fibers with higher refractory grades or alkaline earth silicate series, the molten slurry temperature reaches over 2600℃, exceeding the melting point of the iridium tube in the inlet. At 2200℃, the iridium tube begins to soften and deform. Even under high-strength bonding conditions, the iridium tube will leak or even fall off, ending the inlet's lifespan. During production, most manufacturers do not take any or only simple cooling measures for the tungsten-iridium inlets, simply using the inlet itself to discharge the molten slurry. The lifespan of the tungsten-iridium inlets is very short, leading to increased production costs and a loss of competitive advantage.

[0004] 2. Currently, the most common way to effectively prevent the formation of an oxide layer is to use inert gas for protection. However, most manufacturers conduct this in an open environment, where the inert gas cannot completely fill the inner cavity of the flow outlet, resulting in poor protection. When it is necessary to clean the deposits and oxides in the inner cavity of the flow outlet, the molten slurry continues to flow. Since the high-temperature molten slurry is dangerous and has strong light, employees must wear protective clothing and goggles for full protection. In the hot summer, the working environment is quite harsh, and when cleaning is urgently needed, it takes a long time to put on full protective gear, resulting in a loss of timeliness in the operation. Utility Model Content

[0005] The purpose of this invention is to provide a long-life ceramic fiber molten slurry discharge device to address the issue raised in the background section. The molten slurry discharge device is a crucial component; currently, the molten slurry inlet commonly used in the production of ordinary aluminosilicate ceramic fibers is primarily made of tungsten with an embedded iridium tube. Although tungsten itself can withstand high temperatures, with a melting point of 3410℃, oxidation begins at 300-500℃. As the production process progresses, the oxidation rate of tungsten accelerates significantly under high temperatures. As the oxide layer grows larger, regular cleaning is necessary. Over time, the oxide layer grows even faster, eventually leading to oxidation inside the tungsten inlet. Blockage can shorten the lifespan of a tungsten iridium inlets. Traditional tungsten iridium inlets are primarily designed for aluminosilicate ceramic fibers, with a molten lava temperature of approximately 2000℃. However, when producing higher-grade refractory or alkaline earth silicate soluble fibers, the molten lava temperature reaches over 2600℃, exceeding the melting point of the iridium tube in the inlet. At 2200℃, the iridium tube begins to soften and deform. Even under high-strength bonding conditions, the iridium tube will leak or even detach, ending the inlet's lifespan. During production, most manufacturers either do not perform or only perform simple cooling measures on the tungsten iridium inlets, merely using the inlet itself to guide the molten lava. This results in a very short lifespan for tungsten iridium inlets, increasing production costs and causing a loss of competitive advantage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a long-life ceramic fiber slurry export device, comprising a furnace shell, an outer tube A disposed on the inner side of the furnace shell, a sealing gasket disposed on the outer tube A, a copper head disposed at the lower end of the outer tube A, a molybdenum rod disposed at the lower end of the copper head, a fixed seat disposed at the lower end of the outer tube A, a worm gear adjustment bracket disposed at the lower end of the fixed seat, a water outlet pipe A disposed at the lower end of the outer tube A, an inner tube A disposed on the inner side of the outer tube A, a water inlet pipe A disposed at the left end of the inner tube A, a threaded connecting pipe installed on the left end of the water inlet pipe A via a threaded structure, a filter screen disposed on the inner side of the threaded connecting pipe, an internally threaded pipe disposed on the inner side of the threaded connecting pipe, and the lower end of the internally threaded pipe being tightly fitted with the filter screen;

[0007] An outer tube B is installed at the lower end of the furnace shell, and an upper end cap is installed at the upper end of the outer tube B. A middle tube outer tube boss is fixed at the inner side of the outer tube B. A middle tube A is fixed at the other end of the middle tube outer tube boss. An inner tube middle tube boss is fixed at the inner side of the middle tube A. An inner tube B is fixed at the other end of the inner tube middle tube boss. A nitrogen pipe boss is fixed at the inner side of the inner tube B. A nitrogen pipe A is fixed at the other end of the nitrogen pipe boss. A nitrogen inlet is provided at the lower left end of the nitrogen pipe A. A lower end cap is provided at the lower end of the nitrogen pipe A. An O-ring is provided at the upper end of the lower end cap. A water outlet pipe B and a water inlet pipe B are provided at the lower left end of the outer tube B.

[0008] Preferably, the inlet pipe B and the outlet pipe B are connected to the cooling circulating water.

[0009] Preferably, the upper end cover is stepped, the upper end cover is welded to the outer tube B and the inner tube B, and an internal thread structure is provided on the inner side of the upper end cover.

[0010] Preferably, there are three protrusions in each of the outer tube, the nitrogen tube, and the inner tube, which ensure uniform spacing between the pipes and form a cooling and anti-oxidation channel.

[0011] Preferably, the molybdenum rod is surrounded by molten material, and the outer part of the molten material is unmolded material. The molybdenum rod is provided with internal threads and is connected to the copper head by threads. The copper head is welded to the outer tube A.

[0012] Preferably, the water inlet flow rate of the inlet pipe A is greater than the water outlet flow rate of the outlet pipe A, and the fixing seat supports the outer pipe A and the inner pipe A to make the distance between the inner and outer pipes uniform.

[0013] Preferably, the sealing gasket is watertight during the assembly of the inner and outer tubes, and the worm gear adjustment bracket can be adjusted forward, backward, up, and down.

[0014] Preferably, the filter screen is placed inside the threaded connecting pipe, and the internal threaded pipe rotates into the internal position of the threaded connecting pipe, where it fits tightly against the filter screen.

[0015] Compared with the prior art, this utility model provides a long-life ceramic fiber slurry extraction device, which has the following beneficial effects:

[0016] Before starting the furnace, the tungsten-iridium inlet is threadedly connected to the upper end cover of the cooling and anti-oxidation body and fixed at the lower part of the furnace bottom plate. The inlet is positioned approximately 250 mm above the furnace, and raw materials are piled on top of it. The inlet and outlet of the cooling and anti-oxidation body are connected to the circulating cooling water supply. The inlet of the nitrogen-cooled anti-oxidation body is connected to a nitrogen pipeline. Simultaneously, the molten lava control device is pre-assembled and installed on the outside of the furnace shell. It is adjusted vertically and horizontally using a turbine lift to align the center of the molybdenum rod with the center of the inlet. The circulating cooling water is then connected, entering through the inner pipe of the device. After heat exchange, the hot water exits through the outer pipe and re-enters the circulating cooling water system for cooling. The cooling water from the circulating cooling system enters the channel between the outer and middle pipes of the cooling and anti-oxidation body through the inlet, passes through the upper end cover, and flows into the channel between the middle and inner pipes. The water outlet returns to the circulating cold water cooling system for cooling before re-entering the main body for circulation. Nitrogen flows in from the inlet below the cooling and anti-oxidation main body, passes through the channel between the inner tube and the nitrogen pipe, and is sprayed into the inner cavity of the tungsten-iridium outlet above. It reaches the upper wall of the outlet cavity and then exits from the inner cavity of the nitrogen central pipe. The bottom of the inner cavity is made into an slanted opening, and the top is made into an arc to ensure a smooth passage of nitrogen in the outlet cavity, especially with sufficient nitrogen around the iridium pipe opening, thereby better preventing oxide growth. Through the protection of circulating cooling water and inert gas, the outlet life has been increased from forty days to more than sixty days. With the improvement of circulating cooling water and nitrogen, the growth rate of oxides in the outlet has been reduced by more than 50%. Originally, it needed to be cleaned once every eight hours, but now it only needs to be cleaned once every twenty-four hours. The total furnace life can be increased to more than sixty days.

[0017] When flow interruption cleaning is required, adjust the worm gear adjustment device to lower the molybdenum rod of the molten slurry control device until the lower end face of the molybdenum rod contacts the upper end face of the slurry outlet, blocking the iridium tube opening and stopping the flow of molten slurry. At this time, employees can perform oxidation cleaning inside the slurry outlet without wearing any protective gear. The growth rate of oxides inside the slurry outlet is slowed down, reducing the frequency of cleaning, reducing the workload of employees, and eliminating the need to stop the machine. Employees can complete the cleaning operation when the molten slurry flow is interrupted, reducing the possibility of workplace injuries.

[0018] This device has a threaded connecting pipe installed at the water inlet. A filter screen is installed inside the threaded connecting pipe to filter the water entering the water inlet. The internal threaded pipe can be disassembled to clean the filter screen. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a long-life ceramic fiber slurry extraction device according to the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of a long-life ceramic fiber slurry export device in the interrupted cleaning state according to the present invention.

[0021] Figure 3 This is a partially enlarged structural diagram of a long-life ceramic fiber slurry extraction device according to the present invention.

[0022] Figure 4 This is a schematic diagram of the split structure of the threaded connecting pipe of a long-life ceramic fiber slurry extraction device according to this utility model.

[0023] In the diagram: 1. Furnace shell; 2. Molybdenum rod; 3. Copper head; 4. Sealing gasket; 5. Fixing base; 6. Outer tube A; 7. Inner tube A; 8. Water inlet tube A; 9. Water outlet tube A; 10. Worm gear adjusting bracket; 11. Lower end cover; 12. O-ring seal; 13. Nitrogen inlet; 14. Water inlet tube B; 15. Water outlet tube B; 16. Nitrogen tube A; 17. Middle tube A; 18. Outer tube boss of middle tube; 19. Nitrogen tube boss; 20. Boss of inner tube middle tube; 21. Outer tube B; 22. Upper end cover; 23. Threaded connecting pipe; 24. Internally threaded pipe; 25. Filter screen; 26. Inner tube B. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The utility model provides, for example Figure 1-4 The long-life ceramic fiber slurry discharge device shown includes a furnace shell 1, an outer tube A6 located inside the furnace shell 1, a sealing gasket 4 located at the location of the outer tube A6, a copper head 3 located at the lower end of the outer tube A6, a molybdenum rod 2 located at the lower end of the copper head 3, a fixing seat 5 located at the lower end of the outer tube A6, a worm gear adjusting bracket 10 located at the lower end of the fixing seat 5, a water outlet pipe A9 located at the lower end of the outer tube A6, an inner tube A7 located inside the outer tube A6, a water inlet pipe A8 located at the left end of the inner tube A7, a threaded connecting pipe 23 installed at the left end of the water inlet pipe A8 via a threaded structure, a filter screen 25 located inside the threaded connecting pipe 23, and an internally threaded pipe 24 located inside the threaded connecting pipe 23, with the lower end of the internally threaded pipe 24 tightly connected to the filter screen 25. A tight fit is achieved by installing an outer tube B21 at the lower end of the furnace shell 1, an upper end cap 22 at the upper end of the outer tube B21, a middle tube outer tube boss 18 fixed to the inner side of the outer tube B21, a middle tube A17 fixed to the other end of the middle tube outer tube boss 18, an inner tube middle tube boss 20 fixed to the inner side of the middle tube A17, and an inner tube B26 fixed to the other end of the inner tube middle tube boss 20. The inner tube B26... A nitrogen pipe protrusion 19 is fixed at the inner side, and a nitrogen pipe A16 is fixed at the other end of the nitrogen pipe protrusion 19. A nitrogen inlet 13 is provided at the lower left end of the nitrogen pipe A16. A lower end cap 11 is provided at the lower end of the nitrogen pipe A16. An O-ring 12 is provided at the upper end of the lower end cap 11. A water outlet pipe B15 and a water inlet pipe B14 are provided at the lower left end of the outer pipe B21.

[0028] The molten lava control device is pre-assembled and installed on the outside of the furnace shell 1. It is adjusted up and down and forward and backward by a turbine lift to align the center of the molybdenum rod 2 with the center of the inlet. At the same time, the cooling water circulation is turned on. The cooling water enters from the inner pipe of the device. After heat exchange, the hot water is discharged from the outer pipe and re-enters the cooling water circulation system for cooling. The cooling water from the circulating cooling system enters the channel between the outer and middle pipes of the cooling and anti-oxidation body through the inlet. After passing through the upper end cover 22 of the body, it flows into the channel between the middle and inner pipes and returns to the cooling system of the circulating cold water through the outlet for cooling before re-entering the body for circulation. Nitrogen flows in from the inlet below the cooling and anti-oxidation body, passes through the channel between the inner pipe and the nitrogen pipe, and is sprayed into the inner cavity of the tungsten-iridium inlet above. It reaches the upper wall of the inner cavity of the inlet and is then discharged from the inner cavity of the nitrogen central pipe. The bottom of the inner cavity is made into an slanted opening and the top is made into an arc to ensure the smooth passage of nitrogen in the inner cavity of the inlet, especially the sufficient nitrogen around the iridium pipe opening, so as to better prevent oxide growth.

[0029] like Figure 1 and Figure 2As shown, the inlet pipe B14 and outlet pipe B15 are connected to the cooling circulating water. The upper end cover 22 is stepped and is welded to the outer pipe B21 and the inner pipe B26. An internal thread structure is provided on the inner side of the upper end cover 22. There are three protrusions 18 on the outer pipe of the middle pipe, 19 on the nitrogen pipe, and 20 on the middle pipe of the inner pipe. The protrusions 18 on the outer pipe of the middle pipe, 19 on the nitrogen pipe, and 20 on the middle pipe of the inner pipe make the pipe spacing uniform, and the spacing forms a cooling and anti-oxidation channel.

[0030] There are three positioning bosses between the two pipes to ensure uniform spacing and not affect the passage of water and air. These form a four-layer cooling and anti-oxidation channel. The circulating cooling water enters from the bottom and exits from the top. The cross-sectional area of ​​the water inlet is larger than that of the water outlet, with a ratio of approximately 1.3 to 1, to ensure that the water flows out after filling the cavity. The inlet area of ​​nitrogen is larger than that of nitrogen outlet, to ensure that the gas fills the internal space of the outlet before being discharged.

[0031] like Figure 1 and Figure 3 As shown, the molybdenum rod 2 is surrounded by molten raw material, and the outer part of the molten material is unmolded raw material. The molybdenum rod 2 is provided with internal threads and is connected to the copper head 3 by threads. The copper head 3 is welded to the outer tube A6. The water inlet of the water inlet pipe A8 is greater than the water outlet of the water outlet pipe A9. The fixing seat 5 supports the outer tube A6 and the inner tube A7 to make the distance between the inner and outer tubes uniform. The sealing gasket 4 seals and prevents water leakage when the inner and outer tubes are assembled. The worm gear adjustment bracket 10 can be adjusted back and forth and up and down. The filter screen 25 is placed inside the threaded connecting pipe 23. The internal threaded pipe 24 rotates into the internal position of the threaded connecting pipe 23 and fits tightly with the filter screen 25.

[0032] When flow interruption cleaning is required, adjust the worm gear adjusting device to lower the molybdenum rod 2 of the molten slurry control device until the lower end face of the molybdenum rod 2 contacts the upper end face of the flow port, blocking the iridium tube opening and stopping the molten slurry flow. At this time, employees can perform oxidation cleaning inside the flow port without wearing any protective gear.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A long-life ceramic fiber slurry extraction device, characterized in that, The furnace includes a furnace shell (1), an outer tube A (6) located on the inner side of the furnace shell (1), a sealing gasket (4) located on the outer tube A (6), a copper head (3) located at the lower end of the outer tube A (6), a molybdenum rod (2) located at the lower end of the copper head (3), a fixing seat (5) located at the lower end of the outer tube A (6), a worm gear adjusting bracket (10) located at the lower end of the fixing seat (5), and a water outlet pipe A (9) located at the lower end of the outer tube A (6). An inner tube A (7) is provided on the inner side of the outer tube A (6), and an inlet tube A (8) is provided on the left end of the inner tube A (7). A threaded connecting tube (23) is installed on the left end of the inlet tube A (8) through a threaded structure. A filter screen (25) is provided on the inner side of the threaded connecting tube (23), and an internal threaded tube (24) is provided on the inner side of the threaded connecting tube (23). The lower end of the internal threaded tube (24) is tightly fitted with the filter screen (25). An outer tube B (21) is installed at the lower end of the furnace shell (1), and an upper end cap (22) is installed at the upper end of the outer tube B (21). A middle tube outer tube boss (18) is fixed on the inner side of the outer tube B (21), and a middle tube A (17) is fixed at the other end of the middle tube outer tube boss (18). An inner tube middle tube boss (20) is fixed on the inner side of the middle tube A (17), and an inner tube B (26) is fixed at the other end of the inner tube middle tube boss (20). A nitrogen pipe boss (19) is fixed at the inner side of the tube. A nitrogen pipe A (16) is fixed at the other end of the nitrogen pipe boss (19). A nitrogen inlet (13) is provided at the lower position of the left end of the nitrogen pipe A (16). A lower end cap (11) is provided at the lower end of the nitrogen pipe A (16). An O-ring (12) is provided at the upper end of the lower end cap (11). A water outlet pipe B (15) and a water inlet pipe B (14) are provided at the lower position of the left end of the outer tube B (21).

2. The long-life ceramic fiber slurry extraction device according to claim 1, characterized in that: The inlet pipe B (14) and outlet pipe B (15) are connected to the cooling circulating water.

3. The long-life ceramic fiber slurry extraction device according to claim 1, characterized in that: The upper end cover (22) is stepped and is welded to the outer tube B (21) and the inner tube B (26). An internal thread structure is provided on the inner side of the upper end cover (22).

4. The long-life ceramic fiber slurry extraction device according to claim 1, characterized in that: The outer tube protrusion (18), nitrogen tube protrusion (19), and inner tube protrusion (20) are each provided in three parts. The outer tube protrusion (18), nitrogen tube protrusion (19), and inner tube protrusion (20) make the pipe spacing uniform, and the intervals form a cooling and anti-oxidation channel.

5. The long-life ceramic fiber slurry extraction device according to claim 1, characterized in that: The molybdenum rod (2) is surrounded by molten raw material, and the outer part of the molten material is unmolded raw material. The molybdenum rod (2) is provided with internal threads and is connected to the copper head (3) by threads. The copper head (3) is welded to the outer tube A (6).

6. The long-life ceramic fiber slurry extraction device according to claim 1, characterized in that: The water inlet of the inlet pipe A (8) is greater than the water outlet of the outlet pipe A (9). The fixing seat (5) supports the outer pipe A (6) and the inner pipe A (7) so that the distance between the inner and outer pipes is uniform.

7. The long-life ceramic fiber slurry extraction device according to claim 1, characterized in that: The sealing gasket (4) is sealed and leak-proof during the assembly of the inner and outer tubes, and the worm gear adjustment bracket (10) can be adjusted back and forth and up and down.

8. The long-life ceramic fiber slurry extraction device according to claim 1, characterized in that: The filter screen (25) is placed inside the threaded connecting pipe (23), and the internal threaded pipe (24) rotates into the internal position of the threaded connecting pipe (23) and fits tightly with the filter screen (25).

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