A center pipe self slag cleaning device, center pipe and reduction furnace for vertical retort reduction furnace

Abstract

A self-cleaning slag removal device for a central tube in a vertical reduction furnace, comprising a central tube and a reduction furnace, belongs to the field of high-temperature vacuum reduction technology. It includes a pipe fitting with a diameter smaller than the central tube, the pipe fitting having several through holes on its wall. The number and position of the holes on the pipe fitting match the number and position of the strip-shaped holes in the central tube. It also includes several through-pieces for insertion into the holes. The length of the through-pieces is greater than the diameter of the central tube but less than the diameter of the vertical reduction furnace body. When the pipe fitting is installed inside the central tube, the through-pieces are inserted into the corresponding holes, with both ends extending outside the strip-shaped holes in the central tube. This invention, by setting up a pipe fitting with through-pieces, achieves the purpose of cleaning blockages in the strip-shaped holes of the central tube using the through-pieces.

Description

Technical Field

[0001] This invention belongs to the field of high-temperature vacuum reduction technology, and particularly relates to a self-cleaning slag device for a central tube in a vertical tank reduction furnace, a central tube, and a reduction furnace. Background Technology

[0002] A vertical reduction furnace is a type of furnace in which the reaction vessel—the reduction tank—is vertically installed inside a high-temperature furnace. Material pellets are unloaded into the tank from the upper port and undergo a high-temperature reduction reaction in a sealed, high-vacuum environment. The generated metal vapor is cooled into a solid state in the upper water jacket of the reduction tank, and the reacted material pellets become reduction slag, which is discharged from the lower port of the reduction tank.

[0003] To ensure the generated metal vapor can smoothly reach the crystallization cylinder located in the water jacket for cooling, a central tube needs to be installed inside the reduction tank. Several strip-shaped holes are cut into the tube wall, allowing the metal vapor generated by the annular material around the central tube to enter the central tube through these holes, providing a channel for the metal vapor to rise. Additionally, the bottom of the central tube, situated at the bottleneck of the lower tank opening, also serves to impede the material, keeping it within the tank during the reaction. Only by raising the central tube can the reduction slag be discharged through the bottleneck from the lower tank opening.

[0004] During production, to prevent materials or slag from entering the central tube, the width of the strip-shaped holes on the central tube must be smaller than the diameter of the material pellets. However, during production, the holes inevitably become clogged by broken pellet particles, low-melting-point reactants, dust, etc., affecting the passage and collection of metal vapor. Therefore, the central tube needs to be frequently lifted outside the tank, and workers use shovel-like tools to manually clean the severely clogged holes. Workers have to work closely with the central tube, which reaches temperatures exceeding 1000°C, creating a very harsh working environment with safety hazards. The cleaning is also quite difficult, and this repetitive cleaning operation prolongs the overall operation time. Summary of the Invention

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a self-cleaning slag device for a central tube in a vertical reduction furnace, a central tube, and a reduction furnace. By setting a pipe fitting with a through-hole, the device achieves the purpose of cleaning the blockage in the strip-shaped holes of the central tube using the through-hole.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include: A self-cleaning slag device for a central tube in a vertical reduction furnace includes a pipe fitting with a diameter smaller than that of the central tube. The pipe fitting has several through holes on its wall. The number and position of the holes on the pipe fitting match the number and position of the central tube strip holes on the central tube. The device also includes several through members for penetrating and inserting into the holes. The length of the through members is greater than the diameter of the central tube but less than the diameter of the vertical reduction furnace body. When the pipe fitting is installed inside the central tube, the through members are inserted through the corresponding holes, and both ends extend outside the central tube strip holes.

[0007] Furthermore, after the penetrating member is inserted through the corresponding hole, both ends extend out of the central tube-shaped hole by equal lengths.

[0008] Furthermore, a locating pin is welded to the upper side of one side of the through-hole to restrict the position of the through-hole.

[0009] Furthermore, the width of the locating pin is greater than the diameter of the hole on the pipe fitting, but less than the width of the central tube strip hole on the central tube.

[0010] Furthermore, the maximum diameter of the hole on the fitting is smaller than the width of the central tube strip hole on the central tube.

[0011] Furthermore, the diameter of the through-hole matches the inner diameter of the hole on the pipe, so that the through-hole can be inserted and connected to the hole on the pipe, and the position of the through-hole and the hole is relatively fixed.

[0012] Furthermore, the through-pieces that are close in position are arranged in a longitudinally staggered manner.

[0013] A central tube, internally equipped with the aforementioned self-cleaning slag device for a vertical reduction furnace.

[0014] A vertical reduction furnace, internally equipped with the aforementioned central tube.

[0015] The beneficial effects of this invention are as follows: This invention provides a self-cleaning slag removal device for a vertical reduction furnace, a central tube, and a reduction furnace. By installing a fitting inside the central tube, with a through-hole extending through it, the through-hole's length being greater than the outer diameter of the central tube, when the device is placed inside the central tube and raised or lowered, it causes the through-hole to move up and down within the strip-shaped holes of the central tube, thus automatically cleaning and removing the filler material within the holes. This results in high operational efficiency and eliminates the need for manual cleaning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the pipe fittings of the self-cleaning slag device for the central tube of the vertical reduction furnace of the present invention; Figure 2 This is a top view of the pipe fittings of the self-cleaning slag device for the central tube of the vertical reduction furnace of the present invention; Figure 3This is a schematic diagram of the main structure of the self-cleaning slag device for the central tube of the vertical reduction furnace of the present invention; Figure 4 This is a top view of the self-cleaning slag device for the central tube of the vertical reduction furnace of the present invention; Figure 5 A schematic diagram of the main structure of a central tube with a self-cleaning device; Figure 6 A top view of the central pipe with a self-cleaning device; Figure 7 This is a schematic diagram of the structure when the self-cleaning device is lifted after being assembled with the central tube.

[0017] In the diagram: 1 is a pipe fitting, 2 is a hole, 3 is a through-hole, 4 is a locating pin, 5 is a central tube, and 6 is a strip-shaped hole in the central tube. Detailed Implementation

[0018] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "upper" and "lower" are used interchangeably with other directional terms. Figure 5 The orientation is used as a reference.

[0019] like Figure 1-4 As shown, this invention provides a self-cleaning slag device for a central tube in a vertical reduction furnace, comprising a pipe fitting 1 with a diameter smaller than that of the central tube 5. Specifically, the pipe fitting 1 is used to be built inside the central tube 5. The pipe fitting 1 can be a round tube, a square tube, or a tubular component with other cross-sectional shapes, as long as it can be placed inside the central tube 5 and can move up and down relative to the central tube 5. The material of the pipe fitting 1 can be heat-resistant alloy steel or other materials that can withstand high temperatures of 1200℃ and do not react with the material.

[0020] The pipe fitting 1 has several through holes 2 on its wall. The number and position of the holes 2 on the pipe fitting 1 match the number and position of the central tube strip-shaped holes 6 on the central tube 5. Specifically, since the central tube strip-shaped holes 6 on the central tube 5 are arranged axially symmetrically, the holes 2 on the pipe fitting 1 can also be arranged axially symmetrically, with each hole 2 on the pipe fitting 1 corresponding to a different central tube strip-shaped hole 6 on the central tube 5. The maximum diameter of the holes 2 on the pipe fitting 1 is smaller than the width of the central tube strip-shaped holes 6 on the central tube 5. The shape of the holes 2 on the pipe fitting 1 matches the cross-sectional shape of the through member 3.

[0021] It also includes several penetrating parts 3 for insertion into the hole 2. The length of the penetrating parts 3 is greater than the diameter of the central tube 5, the length of the penetrating parts 3 is smaller than the diameter of the vertical reduction furnace body, and the maximum diameter of the longitudinal section of the penetrating parts 3 is smaller than the width of the strip-shaped hole 6 of the central tube, so that the penetrating parts 3 can penetrate the strip-shaped hole 6 of the central tube and be inserted into the hole 2. The penetrating parts 3 can be round rods, square rods, prisms, strips, or other shapes, as long as they can be inserted into the strip-shaped hole 6 of the central tube.

[0022] When fitting 1 is assembled inside the central tube 5, the penetrating member 3 is inserted through the corresponding hole 2, and both ends extend out of the central tube's strip-shaped hole 6. The lengths of the penetrating member 3 extending out of the central tube's strip-shaped hole 6 are equal.

[0023] To ensure that the lengths of the two ends of the through-piece 3 extending out of the central tube-shaped hole 6 are equal, a positioning pin 4 can be welded to the upper part of one side of the through-piece 3 to limit its insertion position into the hole 2. Specifically, the width of the positioning pin 4 is greater than the diameter of the hole 2 on the tube 1 and less than the width of the central tube-shaped hole 6 on the central tube 5. This ensures that after the tube 1 is placed inside the central tube 5, when the through-piece 3 is inserted from the outside into the central tube-shaped hole 6 on the central tube 5 and the hole 2 on the tube 1, the positioning pin 4 prevents the through-piece 3 from moving further when it reaches the designated position, thus ensuring that the lengths of the two ends of the through-piece 3 extending out of the central tube-shaped hole 6 are equal. Specifically, the diameter of the through-piece 3 matches the inner diameter of the hole 2 on the tube 1, allowing the through-piece 3 to be inserted and connected to the hole 2 on the tube 1, after which the positions of the through-piece 3 and the hole 2 are relatively fixed. More specifically, through-pieces 3 that are close in position are arranged longitudinally in an alternating pattern.

[0024] The present invention also provides a central tube, which is internally equipped with the aforementioned self-cleaning slag device for a vertical reduction furnace.

[0025] The present invention also provides a vertical reduction furnace, which is internally equipped with the aforementioned central tube.

[0026] like Figure 5-6 As shown, during installation, first insert the fitting 1 into the central tube 5, then rotate the inner tube 1 until the hole 2 is completely positioned within the central tube's strip-shaped hole 6, i.e., in a one-to-one correspondence. Next, insert the through-piece 3 through the central tube's strip-shaped hole 6 into the hole 2 until the locating pin 4 contacts the fitting 1 and is blocked, indicating proper installation. At this point, both ends of the through-piece 3 extend outside the central tube's strip-shaped hole 6.

[0027] like Figure 7As shown, during slag discharge from the vertical reduction furnace, the device is lifted upwards using a crane or other equipment. Since the central tube's strip-shaped holes 6 are vertical, the pipe 1 and the through-piece 3 move upwards relative to the central tube. As the central tube 5 moves away from the bottleneck position of the reduction furnace, the through-piece 3 is lifted from its lowest position to its highest position within the central tube's strip-shaped holes 6, and the filler material inside the holes 6 is rubbed away. After slag discharge, when the central tube 5 is lowered, the through-piece 3 descends from its highest position to its lowest position due to gravity, and the filler material inside the holes 6 is again rubbed away. If some filler material remains, the above steps can be repeated until most of the filler material inside the central tube's strip-shaped holes 6 is removed.

[0028] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any modifications, alterations, substitutions, and variations made by those skilled in the art to the above embodiments are within the scope of the present invention.

Claims

1. A self-cleaning slag device for a central tube in a vertical reduction furnace, characterized in that: The system includes a pipe fitting (1) with a diameter smaller than that of the central tube (5). The pipe fitting (1) has several through holes (2) on its wall. The number and position of the holes (2) on the pipe fitting (1) match the number and position of the central tube strip holes (6) on the central tube (5). The system also includes several through parts (3) for inserting into the holes (2). The length of the through parts (3) is greater than the diameter of the central tube (5) and less than the diameter of the vertical tank reduction furnace. When the pipe fitting (1) is installed inside the central tube (5), the through parts (3) are inserted into the corresponding holes (2) and both ends extend to the outside of the central tube strip holes (6).

2. The self-cleaning slag device for a central tube in a vertical retort reduction furnace according to claim 1, characterized in that: After the penetrating piece (3) is inserted through the corresponding hole (2), both ends extend out of the central tube-shaped hole (6) with equal lengths.

3. The self-cleaning slag device for a central tube in a vertical retort reduction furnace according to claim 1, characterized in that: A positioning pin (4) is welded to the upper part of one side of the penetrating part (3) to limit the position of the penetrating part (3) through the insertion hole (2).

4. The self-cleaning slag device for a central tube in a vertical reduction furnace according to claim 3, characterized in that: The width of the positioning pin (4) is greater than the diameter of the hole (2) on the pipe fitting (1) and less than the width of the central tube strip hole (6) on the central tube (5).

5. The self-cleaning slag device for a central tube in a vertical retort reduction furnace according to claim 1, characterized in that: The maximum diameter of the hole (2) on the fitting (1) is smaller than the width of the strip hole (6) on the central tube (5).

6. The self-cleaning slag device for a central tube in a vertical retort reduction furnace according to claim 1, characterized in that: The diameter of the through part (3) matches the inner diameter of the hole (2) on the pipe (1), so that the through part (3) can be inserted and connected to the hole (2) on the pipe (1). The positions of the through part (3) and the hole (2) are relatively fixed.

7. The self-cleaning slag device for a central tube in a vertical retort reduction furnace according to claim 1, characterized in that: (3) Through-pieces that are close in position are arranged longitudinally in an alternating manner.

8. A central tube, characterized in that, The internal assembly includes a central tube self-cleaning slag device for a vertical reduction furnace as described in any one of claims 1-7.

9. A vertical reduction furnace, characterized in that, The central tube as described in claim 8 is internally assembled.

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