A central tube for a reduction tank

Abstract

The present invention relates to the technical field of magnesium smelting, and discloses a central tube for a reduction tank, comprising a supporting connection part located in the middle, the supporting connection part being a hollow structure penetrating from top to bottom, a plurality of connecting pieces being arranged along the circumferential direction of the outer side of the supporting connection part, each of the connecting pieces being arranged along the axial direction of the supporting connection part, and a gap being formed between two adjacent connecting pieces; wherein the connecting pieces located at odd positions and the connecting pieces located at even positions are respectively connected to form a frame through corresponding supporting connection parts, and the two frames can be slidably adjusted relative to each other; the present invention can utilize the power of lifting the central tube upward when slag is discharged from the reduction tank, so that the two frames slide relative to each other, thereby removing the ash and slag blocked between the two adjacent connecting pieces through friction, thereby achieving the purpose of automatic cleaning, without the need for manual cleaning of the central tube, reducing labor intensity, and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of magnesium smelting, and in particular to a central tube for a reduction tank. Background Art

[0002] At present, in the smelting process of metallic magnesium, vertical reduction tank (vertical tank) magnesium smelting has the advantages of convenient furnace charge filling and automation and mechanization of slag discharge, thereby reducing the labor intensity of workers. Therefore, vertical reduction tank magnesium smelting has gradually become the future development direction of silicon thermal magnesium reduction process; specifically, the reduction tank is erected vertically in the furnace, and a lower discharge port is opened, relying on gravity to add materials from the upper part and discharge slag from the lower part.

[0003] In order to ensure that the magnesium vapor generated during the smelting process rises to the crystallization barrel arranged at the top of the vertical reduction tank for cooling and crystallization, it is usually necessary to set a central tube in the vertical reduction tank to provide a channel for the rise of magnesium vapor, so as to avoid the formation of a relatively tight part (usually more serious at the bottom of the vertical reduction tank) by the pellets and their debris dust, which causes the magnesium vapor to be unable to rise, thereby improving the magnesium smelting efficiency; at the same time, since the heating depth of the furnace outside the reduction tank usually cannot reach the center position, the central tube is filled in the middle of the vertical reduction tank to enable the pellets to be fully smelted and reduce the material-magnesium ratio.

[0004] However, the current reduction tank center tube mostly uses seamless steel tubes, and multiple openings are opened on the tube wall for magnesium vapor to pass through. Each center tube has at least 48 small holes. In the harsh environment of high temperature dust in the tank, it usually takes two furnaces to cause blockage, which directly affects the production capacity. After the center tube is blocked, it is all cleared manually. The specific operation is to lift the 1200℃ high-temperature center tube by a crane after slag release, and the employees hold steel sights to poke holes in the high-temperature center tube. The labor intensity is extremely high. This method of cleaning the center tube is not only time-consuming and labor-intensive, but also because the center tube has a high temperature, there are great safety hazards in the cleaning process. Therefore, there is an urgent need for a reduction tank center tube that can automatically clear the blockage without manual intervention. Summary of the invention

[0005] The purpose of the present invention is to provide a central tube for a reduction tank, which can utilize the power of lifting the central tube upward when slag is discharged from the reduction tank to make the two frames slide relative to each other, so that the ash and slag blocked between two adjacent connecting pieces are removed by friction, thereby achieving the purpose of automatic cleaning, eliminating the need for manual cleaning of the central tube, reducing labor intensity and improving work efficiency.

[0006] The present invention adopts the following technical solutions:

[0007] A central tube for a reduction tank comprises a supporting connection portion located in the middle, the supporting connection portion being a hollow structure penetrating from top to bottom, a plurality of connecting pieces being arranged along the circumferential direction of the outer side of the supporting connection portion, each of the connecting pieces being arranged along the axial direction of the supporting connection portion, and a gap being formed between two adjacent connecting pieces; wherein the connecting pieces located at odd positions and the connecting pieces located at even positions are each connected to form a frame through the corresponding supporting connection portion, and the two frames can be slidably adjusted relative to each other.

[0008] Preferably, a plurality of the supporting connection parts are arranged at intervals, and the supporting connection parts connected to the connection pieces at odd positions and the supporting connection parts connected to the connection pieces at even positions are arranged alternately.

[0009] Preferably, the connecting piece is detachably connected to the supporting connecting portion.

[0010] Preferably, each of the connecting pieces is a split structure, and the split connecting piece is detachably connected to the corresponding supporting connecting portion.

[0011] Preferably, a plurality of groups of connecting ear plates are vertically arranged at the upper and lower ends of each of the supporting connecting parts, and the connecting pieces are detachably connected to the connecting ear plates.

[0012] Preferably, a fixing hole is provided on the connecting ear plate, and the connecting ear plate passes through a mounting hole provided on the connecting piece and is then inserted into the fixing hole by a pin.

[0013] Preferably, the connecting piece is arc-shaped.

[0014] Preferably, a sealing head is provided at the bottom of one of the frames.

[0015] Preferably, the plugging head is conical.

[0016] Preferably, the supporting connecting part body is a cylindrical structure that penetrates from top to bottom, and its outer side wall is arranged in an arc shape that matches the connecting piece.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a channel for magnesium vapor to rise by arranging a plurality of connecting pieces on the circumference and spacing adjacent connecting pieces to form a gap. By connecting odd-numbered connecting pieces with even-numbered connecting pieces to form a frame, the power of lifting the central tube upward when the slag is discharged from the reduction tank can be used to make the two frames slide relative to each other, thereby removing the ash and slag blocked between two adjacent connecting pieces through friction, achieving the purpose of automatic slag cleaning, eliminating the need for manual cleaning of the central tube, reducing labor intensity, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of an embodiment of the present application;

[0019] Figure 2 A top view of an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the structure of the connecting piece of an embodiment of the present application. DETAILED DESCRIPTION

[0021] The present invention will be described clearly and completely below with reference to the accompanying drawings and embodiments:

[0022] like Figures 1 to 3 As shown, a central tube for a reduction tank described in the present invention comprises a plurality of connecting pieces 1 arranged along the circumference. In this embodiment, the connecting pieces 1 are preferably arranged in 6 numbers, and each connecting piece 1 is preferably arranged in an arc-shaped structure to enhance its structural strength and prevent the connecting piece 1 from deforming during a high-temperature process. A gap is formed between two adjacent connecting pieces 1 to provide a rising channel for magnesium vapor; wherein the connecting pieces 1 located at odd positions and the connecting pieces 1 located at even positions are each connected to form a frame, and the two frames can be adjusted to slide relative to each other, so that when slag is discharged inside the reduction tank, the two frames can slide relative to each other by the power of lifting the central tube upward, thereby removing the ash and slag blocked between two adjacent connecting pieces 1 through friction, thereby achieving the purpose of automatic slag cleaning, without the need to manually clean the central tube, reducing labor intensity and improving work efficiency. A lifting ring 2 can be provided on the frame that moves upward during lifting to facilitate the subsequent lifting operation of the crane. During the lifting process, the frame on which the lifting ring 2 is provided is subjected to an upward pulling force, and there is friction between the other frame and the slag in the reduction tank. At this time, as the lifting ring 2 is gradually lifted, the two frames will move relative to each other, thereby realizing the slag cleaning operation in the gap between adjacent connecting plates 1.

[0023] In addition, in this embodiment, a sealing head 3 is provided at the bottom of one of the frames. The sealing head 3 is provided at the bottom of the frame where the lifting ring 2 is not provided, and is preferably provided as a conical structure so as to seal the bottom of the vertical reduction tank and ensure the sealing during the smelting process.

[0024] Further, a supporting connection part 4 is provided in the middle of the multiple connecting pieces 1 located at odd positions and even positions, and the corresponding connecting pieces 1 are connected by the supporting connection part 4. At the same time, the supporting connection part 4 is preferably arranged at intervals so as to provide uniform support for the connecting piece 1, wherein the supporting connection part 4 connected to the connecting piece 1 at the odd position and the supporting connection part 4 connected to the connecting piece 1 at the even position are arranged alternately, and the distance that can slide between the two frames is the spacing between the two supporting connection parts 4, and this spacing is adjusted according to actual needs. Calculated based on the total length of the connecting piece 1 in this embodiment of 4m, the relative sliding distance of the frame is 46cm. In this embodiment, the connecting piece 1 is detachably connected to the supporting connection part 4 to facilitate subsequent targeted replacement and adjustment, and reduce the cost of maintenance and repair. In addition, each connecting piece 1 is a split structure, and the split connecting piece 1 is detachably connected to the corresponding supporting connection part 4; the split setting of the connecting piece 1 can reduce the cost of subsequent maintenance and repair on the one hand, and can realize targeted replacement and maintenance, and on the other hand, the segmented setting of the connecting piece 1 helps to slide between the two frames and reduce the resistance during lifting.

[0025] Furthermore, in this embodiment, the main body of the support connection part 4 is preferably set as a hollow cylindrical structure and its outer side surface is set as an arc structure, so as to enhance the fit with the connecting piece 1; the hollow setting of the support connection part 4 can not only reduce the overall weight of the central tube and reduce the manufacturing cost, but also provide an ascending channel for magnesium vapor inside the central tube to ensure the crystallization efficiency and crystallization effect of magnesium; multiple groups of connecting ear plates 5 are vertically arranged at the upper and lower ends of each support connection part 4, and the connecting piece 1 and the connecting ear plates 5 are detachably connected. Specifically, a fixing hole is provided on the connecting ear plate 5, and after the connecting ear plate 5 passes through the mounting hole 6 provided on the connecting piece 1, it is penetrated into the fixing hole by a pin 7 to realize the connection between the support connection part 4 and the connecting piece 1. The structure is easy to install and disassemble, simple in structure, and highly practical.

[0026] When the present invention is in use, the central tube is integrally loaded into the vertical reduction tank, and the slag discharge hole at the bottom of the vertical reduction tank is sealed by using the plugging head 3 arranged at the bottom of the central tube; then, the smelting material is added into the vertical reduction tank, and when slag discharge is required after the smelting is completed, the crane is connected to the lifting ring 2 arranged on the frame. As the lifting is gradually carried out, due to the friction between the slag and the connecting piece 1 and the effect of the frame's own gravity, relative sliding will occur between the two frames. At this time, the ash and slag blocked in the gap between the two adjacent connecting pieces 1 can be cleaned up without manual intervention, which not only reduces labor intensity but also ensures safety, while improving work efficiency.

Claims

1. A central tube for a reduction tank, characterized in that: It includes a supporting connection part located in the middle position, which is a hollow structure that passes through from top to bottom. A plurality of connecting pieces are arranged along the circumferential direction of the outer side of the supporting connection part, each of which is arranged along the axial direction of the supporting connection part, and a gap is formed between two adjacent connecting pieces; wherein the connecting pieces located at odd positions and the connecting pieces located at even positions are each connected to form a frame through the corresponding supporting connection part, and the two frames can be slidably adjusted relative to each other.

2. The central tube for a reduction tank according to claim 1, characterized in that: A plurality of the supporting connection parts are arranged at intervals, and the supporting connection parts connected to the connecting pieces at odd positions and the supporting connection parts connected to the connecting pieces at even positions are arranged alternately.

3. The central tube for a reduction tank according to claim 1, characterized in that: The connecting piece is detachably connected to the supporting connecting portion.

4. The central tube for a reduction tank according to claim 2, characterized in that: Each of the connecting pieces is a split structure, and the split connecting piece is detachably connected to the corresponding supporting connecting part.

5. The central tube for the reduction tank according to claim 4, characterized in that: A plurality of connecting ear plates are vertically arranged at the upper and lower ends of each supporting connecting portion, and the connecting pieces are detachably connected to the connecting ear plates.

6. The central tube for the reduction tank according to claim 5, characterized in that: The connecting ear plate is provided with a fixing hole. After the connecting ear plate passes through the mounting hole provided on the connecting piece, the connecting ear plate is penetrated into the fixing hole by a pin.

7. The central tube for a reduction tank according to claim 1, characterized in that: The connecting piece is in an arc shape.

8. The central tube for a reduction tank according to claim 1, characterized in that: A plugging head is provided at the bottom of one of the frames.

9. The central tube for the reduction tank according to claim 8, characterized in that: The plugging head is conical.

10. The central tube for a reduction tank according to claim 7, characterized in that: The supporting connecting part body is a cylindrical structure that penetrates from top to bottom, and its outer side wall is arranged in an arc shape that matches the connecting piece.

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