Self-baking electrode shell of submerged arc furnace

Abstract

The self-baking electrode shell of the submerged arc furnace comprises an electrode cylinder frame, the electrode cylinder frame comprises an upper electrode cylinder and a lower electrode cylinder, a plurality of rib sheets are evenly and fixedly installed on the inner wall of the upper electrode cylinder and the inner wall of the lower electrode cylinder, and a shroud ring is fixed between the upper electrode cylinder and the lower electrode cylinder. The bottom end of the rib sheet arranged in the upper electrode cylinder is fixedly connected with the top end of the rib sheet arranged in the lower electrode cylinder to form a straight-through rib sheet, and the straight-through rib sheet is fixedly mounted on the inner wall surface of the shroud ring. The rib pieces comprise first rib pieces, second rib pieces and supporting rods, and the first rib pieces and the second rib pieces are located on the vertical face and distributed in a staggered mode; the end parts of the first rib sheet and the second rib sheet respectively extend to the inner walls of the upper electrode cylinder and the lower electrode cylinder and are fixed; a plurality of supporting rods are fixedly installed between the first rib sheets arranged on the same straight line on the two sides. The utility model has the beneficial effects of reasonable structural design, convenience in installation, low processing and manufacturing cost, high strength, strong deformation resistance, good sealing performance, low failure rate, simple structure and easiness in maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of ferroalloy equipment, in particular to a self-baking electrode shell for a submerged arc furnace. Background Art

[0002] With the rapid development of ferroalloy enterprises, the competition in the ferroalloy industry is becoming increasingly fierce. In order to be invincible in the industry competition, the ferroalloy industry continuously improves the performance of equipment to improve the reliability and competitiveness of equipment. The electrode shell of the self-baking electrode of the ferroalloy ore-fired furnace is traditionally made of internal ribs that are only close together due to process and other reasons, but not connected. As a result, the current cannot be smoothly transmitted downward through the ribs during the baking of the self-baking electrode. The ribs are easily hit or knocked off by the electrode paste filled in the electrode shell, which weakens the lateral strength of the self-baking electrode and easily causes cracks and fractures in the self-baking electrode. The maintenance is difficult and the maintenance cost is high, resulting in frequent electrode failures during the operation of the self-baking electrode, causing thermal shutdown failures, and bringing great economic losses to the normal operation of the enterprise.

[0003] The publication number is: CN210518911U, and the name is: A self-baking electrode shell with a spark prevention function, including an electrode shell arc plate, a rib sheet, and a round steel. The utility model is provided with a rib sheet and an L-shaped plate, and the connecting line L at the other end of the rib sheet is aligned with the gap between two adjacent electrode shell arc plates on the cylinder, so that the other end of the rib sheet is aligned with the outer wall of the cylinder, ensuring that the rib sheets above the other end of the rib sheet are aligned with the outer wall of the cylinder, and the L-shaped plate is evenly arranged around the outer wall of the cylinder, and the L-shaped plate is at a distance from the connecting line L at the other end of the rib sheet. The distance D1 between the L-shaped plate on the rib sheet and the outer wall of the cylinder is smaller than the width D2 of the other end of the rib sheet, and D1 is 2 / 5-4 / 5 of D2, which greatly extends the distance between the L-shaped plate on the rib sheet and the outer wall of the cylinder. While improving the overall strength of the self-baking electrode shell, it can also make the L-shaped plate on the rib sheet easier to fully contact with the conductive clips evenly distributed around the outer wall of the cylinder, ensuring that the rib sheet and the conductive clip are accurately matched, eliminating the sparking phenomenon of the self-baking electrode shell during the baking process, avoiding the adverse effects of sparking on the electrode, and making the electrode sintered well.

[0004] Although the above-mentioned self-baking electrode shell has a fireproof function, its strength is insufficient. Utility Model Content

[0005] The utility model aims to provide a self-baking electrode shell for a submerged arc furnace which has reasonable structural design, convenient installation, low processing cost, high strength, strong deformation resistance, good sealing performance, low failure rate, simple structure and easy maintenance.

[0006] The utility model discloses a self-baking electrode shell for an electric arc furnace, comprising an electrode tube frame, the electrode tube frame comprising an upper electrode tube and a lower electrode tube, a plurality of ribs are evenly and fixedly installed on the inner walls of the upper electrode tube and the lower electrode tube, and a circumferential belt is fixedly connected between the upper electrode tube and the lower electrode tube.

[0007] The bottom end of the rib sheet arranged inside the upper electrode cylinder is fixedly connected with the top end of the rib sheet arranged inside the lower electrode cylinder to form a straight rib sheet, and the straight rib sheet is fixedly installed on the inner wall surface of the surrounding belt.

[0008] The electrode cylinder frame is arranged as an upper electrode cylinder and a lower electrode cylinder, which is convenient for installation and disassembly and maintenance. At the same time, the bottom end of the rib sheet arranged inside the upper electrode cylinder is fixedly connected with the top end of the rib sheet arranged inside the lower electrode cylinder to form a straight-through rib sheet, which is fixedly installed on the inner wall surface of the circumference, so that the current can be smoothly conducted downward through the rib sheet when the self-baking electrode is baked. The rib sheet is not easily knocked down by the electrode paste filled in the upper electrode cylinder and the lower electrode cylinder, which can effectively prevent the hidden dangers of electrode paste hanging, so that the self-baking electrode can be baked well, effectively reducing the failure of the self-baking electrode in the electric arc furnace, and can improve the strength of the electrode cylinder frame, with strong anti-deformation ability and good sealing performance.

[0009] The ribs include a first rib, a second rib and a support rod. The first rib and the second rib are located on a vertical plane, and are distributed in an interlaced manner. The ends of the first rib and the second rib extend toward the inner walls of the upper electrode cylinder and the lower electrode cylinder respectively, and are fixed to the inner walls of the upper electrode cylinder and the lower electrode cylinder. A plurality of support rods are fixedly installed between the first ribs arranged in the same straight line on both sides.

[0010] The angle between the first rib and the second rib is 20-30°.

[0011] The ends of the first rib and the second rib are respectively extended to the inner walls of the upper electrode cylinder and the lower electrode cylinder and fixed to the inner walls of the upper electrode cylinder and the lower electrode cylinder, which can not only improve the strength of the electrode cylinder frame but also better conduct current.

[0012] The support rods are arranged in a staggered manner.

[0013] The support rods provided can support the ribs, thereby increasing the strength of the ribs, thereby increasing the strength of the electrode cylinder frame, making it less prone to deformation, and further increasing the compressive strength.

[0014] Beneficial effects of the utility model:

[0015] 1) The electrode cylinder frame is arranged as an upper electrode cylinder and a lower electrode cylinder, which is convenient for installation and disassembly and maintenance; at the same time, the bottom end of the rib sheet arranged inside the upper electrode cylinder is fixedly connected with the top end of the rib sheet arranged inside the lower electrode cylinder to form a straight-through rib sheet, which is fixedly installed on the inner wall surface of the circumference, so that the current can be smoothly conducted downward through the rib sheet when the self-baking electrode is baked, and the rib sheet is not easily knocked down by the electrode paste filled in the upper electrode cylinder and the lower electrode cylinder, which can effectively prevent the hidden dangers of electrode paste hanging, so that the self-baking electrode can be baked well, effectively reducing the failure of the self-baking electrode of the ore-fired furnace, and can improve the strength of the electrode cylinder frame, with strong anti-deformation ability and good sealing performance.

[0016] 2) The ends of the first rib and the second rib are respectively extended toward the inner walls of the upper electrode cylinder and the lower electrode cylinder, and fixed to the inner walls of the upper electrode cylinder and the lower electrode cylinder, which can not only improve the strength of the electrode cylinder frame, but also better conduct current.

[0017] 3) The support rods provided can support the ribs, thereby increasing the strength of the ribs, thereby increasing the strength of the electrode tube frame, making it less prone to deformation, and further increasing the compressive strength.

[0018] 4) The device has a reasonable structural design, convenient installation and maintenance, stable current transmission, high compressive strength, not easy to deform, can increase service life, and has a low failure rate. It has been put into production and use with good results, and is worthy of large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 for Figure 1 A top view of

[0021] Figure 3 It is a schematic diagram of the layout structure of the reinforcement sheet in the utility model.

[0022] In the figure: a circumferential belt 1, an upper electrode cylinder 2, a lower electrode cylinder 3, a rib sheet 4, a first rib sheet 401, a second rib sheet 402, a support rod 403, a straight rib sheet 5, and an electrode cylinder frame 6. DETAILED DESCRIPTION

[0023] Example 1.

[0024] The following will be combined with the attached Figure 1-3 The utility model is further described.

[0025] The utility model includes a circumferential belt 1, an upper electrode cylinder 2, a lower electrode cylinder 3, ribs 4, a first rib 401, a second rib 402, a support rod 403, a straight rib 5, and an electrode cylinder frame 6. The specific structure includes the electrode cylinder frame 6, the electrode cylinder frame 6 includes the upper electrode cylinder 2 and the lower electrode cylinder 3, a plurality of ribs 4 are evenly and fixedly installed on the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3, and the circumferential belt 1 is fixedly connected between the upper electrode cylinder 2 and the lower electrode cylinder 3.

[0026] The bottom end of the rib sheet 4 provided inside the upper electrode cylinder 2 is fixedly connected to the top end of the rib sheet 4 provided inside the lower electrode cylinder 3 to form a straight rib sheet 5 , which is fixedly mounted on the inner wall surface of the circumferential belt 1 .

[0027] The ribs 4 include a first rib 401, a second rib 402 and a support rod 403. The first rib 401 and the second rib 402 are located on a vertical plane, and the first rib 401 and the second rib 402 are distributed in an interlaced manner; the ends of the first rib 401 and the second rib 402 extend toward the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3, respectively, and are fixed to the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3; a plurality of support rods 403 are fixedly installed between the first ribs 401 arranged in the same straight line on both sides.

[0028] The circumferential belt 1 is made of a cold-rolled carbon steel plate with a thickness of 2.5 mm.

[0029] The upper electrode cylinder 2 and the lower electrode cylinder 3 are made of cold-rolled carbon steel plates with a thickness of 2.5 mm.

[0030] The rib sheet 4 is made of a cold-rolled carbon steel plate with a thickness of 2 mm.

[0031] When in use: the upper electrode cylinder 2 and the lower electrode cylinder 3 are cylindrical structures formed by rolling and welding, and the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3 are evenly welded with multiple ribs 4, the height of the ribs 4 is higher than the height of the upper electrode cylinder 2 and the lower electrode cylinder 3, and extend from the upper and lower end surfaces of the upper electrode cylinder 2 and the lower electrode cylinder 3 respectively, and the extension height is 80mm; the bottom end of the rib 4 arranged inside the upper electrode cylinder 2 and the top end of the rib 4 arranged inside the lower electrode cylinder 3 are welded together to form a straight-through rib 5, and the straight-through rib 5 is fixedly welded to the inner wall surface of the shroud 1.

[0032] During operation, the self-baking electrodes of the ferroalloy ore-fired furnace are continuously consumed and welded together. An electric single-beam crane or an electric hoist or other lifting equipment is used to lift the upper electrode tube 2 and connect it with the existing self-baking electrode of the ore-fired furnace. The ribs 4 extending from the lower end of the upper electrode tube 2 are welded with the ribs 4 extending from the uppermost end of the electrode shell of the existing self-baking electrode to form straight-through ribs 5. The shroud 1 is welded to the outside of the middle position of the upper electrode tube 2 and the lower electrode tube 3 to tightly wrap the straight-through ribs 5 inside. After welding, the upper and lower welds of the shroud 1 are polished to remove sharp protrusions and welding spatter to ensure a smooth surface of the electrode shell.

[0033] During operation, solid electrode paste is continuously added into the self-baking electrode cylinder through the upper electrode cylinder 2. The straight ribs 5 are not easily knocked down and deformed by the electrode paste filled into the electrode shell, and the self-baking electrode shell is not easily deformed, which greatly reduces the failure rate of the self-baking electrode.

[0034] Example 2.

[0035] The following will be combined with the attached Figure 1-3 The utility model is further described.

[0036] The utility model includes a circumferential belt 1, an upper electrode cylinder 2, a lower electrode cylinder 3, ribs 4, a first rib 401, a second rib 402, a support rod 403, a straight rib 5, and an electrode cylinder frame 6. The specific structure includes the electrode cylinder frame 6, the electrode cylinder frame 6 includes the upper electrode cylinder 2 and the lower electrode cylinder 3, a plurality of ribs 4 are evenly and fixedly installed on the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3, and the circumferential belt 1 is fixedly connected between the upper electrode cylinder 2 and the lower electrode cylinder 3.

[0037] The bottom end of the rib sheet 4 provided inside the upper electrode cylinder 2 is fixedly connected to the top end of the rib sheet 4 provided inside the lower electrode cylinder 3 to form a straight rib sheet 5 , which is fixedly mounted on the inner wall surface of the circumferential belt 1 .

[0038] The ribs 4 include a first rib 401, a second rib 402 and a support rod 403. The first rib 401 and the second rib 402 are located on a vertical plane, and the first rib 401 and the second rib 402 are distributed in an interlaced manner; the ends of the first rib 401 and the second rib 402 extend toward the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3, respectively, and are fixed to the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3; a plurality of support rods 403 are fixedly installed between the first ribs 401 arranged in the same straight line on both sides.

[0039] The included angle between the first rib 401 and the second rib 402 is 20-30°.

[0040] The support rods 403 are arranged in a staggered manner.

[0041] The circumferential belt 1 is made of a cold-rolled carbon steel plate with a thickness of 2.5 mm.

[0042] The upper electrode cylinder 2 and the lower electrode cylinder 3 are made of cold-rolled carbon steel plates with a thickness of 2.5 mm.

[0043] The rib sheet 4 is made of a cold-rolled carbon steel plate with a thickness of 2 mm.

[0044] When in use: the upper electrode cylinder 2 and the lower electrode cylinder 3 are cylindrical structures formed by rolling and welding, and the inner walls of the upper electrode cylinder 2 and the lower electrode cylinder 3 are evenly welded with multiple ribs 4, the height of the ribs 4 is higher than the height of the upper electrode cylinder 2 and the lower electrode cylinder 3, and extend from the upper and lower end surfaces of the upper electrode cylinder 2 and the lower electrode cylinder 3 respectively, and the extension height is 80mm; the bottom end of the rib 4 arranged inside the upper electrode cylinder 2 and the top end of the rib 4 arranged inside the lower electrode cylinder 3 are welded together to form a straight-through rib 5, and the straight-through rib 5 is fixedly welded to the inner wall surface of the shroud 1.

[0045] During operation, the self-baking electrodes of the ferroalloy ore-fired furnace are continuously consumed and welded together. An electric single-beam crane or an electric hoist or other lifting equipment is used to lift the upper electrode tube 2 and connect it with the existing self-baking electrode of the ore-fired furnace. The ribs 4 extending from the lower end of the upper electrode tube 2 are welded with the ribs 4 extending from the uppermost end of the electrode shell of the existing self-baking electrode to form straight-through ribs 5. The shroud 1 is welded to the outside of the middle position of the upper electrode tube 2 and the lower electrode tube 3 to tightly wrap the straight-through ribs 5 inside. After welding, the upper and lower welds of the shroud 1 are polished to remove sharp protrusions and welding spatter to ensure a smooth surface of the electrode shell.

[0046] During operation, solid electrode paste is continuously added into the self-baking electrode cylinder through the upper electrode cylinder 2. The straight ribs 5 are not easily knocked down and deformed by the electrode paste filled into the electrode shell, and the self-baking electrode shell is not easily deformed, which greatly reduces the failure rate of the self-baking electrode.

[0047] The ends of the first rib 401 and the second rib 402 are respectively extended to the inner walls of the upper electrode tube 2 and the lower electrode tube 3 and fixed to the inner walls of the upper electrode tube 2 and the lower electrode tube 3, which can not only improve the strength of the electrode tube frame 6 but also better conduct current.

[0048] The support rod 403 can support the rib sheet 4, thereby improving the strength of the rib sheet 4, thereby improving the strength of the electrode tube frame 6, making it less likely to deform, and further improving the compressive strength.

Claims

1. A self-baking electrode shell for a submerged arc furnace, characterized in that: The electrode cylinder frame (6) comprises an upper electrode cylinder (2) and a lower electrode cylinder (3), a plurality of ribs (4) are evenly and fixedly mounted on the inner walls of the upper electrode cylinder (2) and the lower electrode cylinder (3), and a circumferential belt (1) is fixedly connected between the upper electrode cylinder (2) and the lower electrode cylinder (3).

2. The self-baking electrode shell of a submerged arc furnace as claimed in claim 1, characterized in that: The bottom end of the rib sheet (4) provided inside the upper electrode cylinder (2) is fixedly connected to the top end of the rib sheet (4) provided inside the lower electrode cylinder (3) to form a straight-through rib sheet (5), and the straight-through rib sheet (5) is fixedly mounted on the inner wall surface of the circumferential belt (1).

3. The self-baking electrode shell of a submerged arc furnace as claimed in claim 1, characterized in that: The ribs (4) comprise a first rib (401), a second rib (402) and a support rod (403); the first rib (401) and the second rib (402) are located on a vertical plane, and the first rib (401) and the second rib (402) are arranged in a staggered manner; ends of the first rib (401) and the second rib (402) extend toward the inner walls of the upper electrode cylinder (2) and the lower electrode cylinder (3), respectively, and are fixed to the inner walls of the upper electrode cylinder (2) and the lower electrode cylinder (3); and a plurality of support rods (403) are fixedly installed between the first ribs (401) arranged in the same straight line on both sides.

4. A self-baking electrode shell for a submerged arc furnace as claimed in claim 2, characterized in that: The included angle between the first rib (401) and the second rib (402) is 20-30°.

5. The self-baking electrode shell of a submerged arc furnace as claimed in claim 3, characterized in that: The support rods (403) are arranged in a staggered manner.

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