A feeding connection for an electric arc furnace

Abstract

The utility model relates to the technical field of ore -smelting furnace, concretely is a kind of ore -smelting furnace feeding joint, including furnace mouth, the top of furnace mouth has feeding pipe, the outer wall of feeding pipe is fixedly sleeved with water cooling sleeve one, the outer wall top and bottom of water cooling sleeve one are fixedly connected with fixed ring, the bottom of feeding pipe is sleeved with water cooling sleeve two, and there is gap between water cooling sleeve two and feeding pipe, water cooling sleeve two is fixedly connected at the top of furnace mouth, the top outer wall of water cooling sleeve two is fixedly connected with connecting pipe, the inner wall top end of connecting pipe is fixedly connected with support ring, support ring is located between two fixed rings, and the top and bottom of support ring all have ball disc, support ring is rotatably connected with two fixed rings respectively by two ball discs, and the outer wall top of water cooling sleeve one is fixedly connected with water inlet pipe one and water outlet pipe one.The water cooling sleeve one separates feeding pipe and ball disc, and water cooling sleeve two cools the high temperature zone of furnace mouth, fundamentally solves the "stuck" problem caused by high temperature thermal deformation.

Description

Technical Field

[0001] This utility model relates to the field of electric arc furnace technology, specifically to a charging joint for an electric arc furnace. Background Technology

[0002] Submerged arc furnaces are important equipment used in metallurgy, chemical and other industries to produce products such as ferroalloys, calcium carbide, and ferrosilicon. During the production process, the mixed raw materials need to be continuously added into the furnace through the feeding system. The feeding joint is a key component that connects the fixed feed pipe and the rotating furnace opening. Its function is to ensure that the furnace charge can be accurately and evenly filled into the furnace, while ensuring that the feeding pipe can rotate relative to the furnace body to change the feeding point and make the reaction in the furnace more uniform.

[0003] The rotating components of the current joint structure lack effective cooling or are insufficiently cooled. When exposed to high-temperature heat radiation for a long time, the metal parts are prone to thermal expansion and deformation. Once deformed, the fit clearance between the rotating mechanisms disappears, which will lead to sluggish rotation or even complete jamming, causing the feeding system to fail to work properly and seriously affecting the continuity and stability of production. Utility Model Content

[0004] The technical solution adopted by this utility model is as follows:

[0005] A charging connector for a submerged arc furnace includes a furnace opening. A charging pipe is located at the top of the furnace opening. A water-cooled sleeve (first type) is fixedly sleeved on the outer wall of the charging pipe. Fixing rings are fixedly connected to the top and bottom of the outer wall of the first water-cooled sleeve. A second water-cooled sleeve (second type) is sleeved at the bottom of the charging pipe, with a gap between the second water-cooled sleeve and the charging pipe. The second water-cooled sleeve (second type) is fixedly connected to the top of the furnace opening. A connecting pipe is fixedly connected to the top outer wall of the second water-cooled sleeve. A support ring is fixedly connected to the top of the inner wall of the connecting pipe, positioned between the two fixing rings. Between them, the top and bottom of the support ring are equipped with ball bearing discs. The support ring is rotatably connected to two fixed rings through two ball bearing discs respectively. The top of the outer wall of the first water-cooled sleeve is fixedly connected to the first water inlet pipe and the first water outlet pipe. The inner wall of the first water-cooled sleeve is fixedly connected to the first partition plate, which is located between the first water inlet pipe and the first water outlet pipe. The outer wall of the second water-cooled sleeve is fixedly connected to the second water inlet pipe and the second water outlet pipe. The inner wall of the second water-cooled sleeve is fixedly connected to the second partition plate, which is located between the second water inlet pipe and the second water outlet pipe.

[0006] A protective sleeve is fixedly connected to the top of the outer wall of the water-cooled sleeve. The protective sleeve covers the outside of the fixing ring and the support ring, and there is a gap between the protective sleeve and the connecting pipe.

[0007] The beneficial effects of this utility model are:

[0008] The first water-cooled jacket separates the feeding pipe from the ball bearing plate, while the second water-cooled jacket cools the high-temperature zone of the furnace opening. This design isolates the fixed ring, support ring, and ball bearing plate from extreme heat sources, ensuring they always operate at a lower temperature. This fundamentally solves the "jamming" problem caused by high-temperature thermal deformation, greatly improving the reliability and lifespan of the equipment.

[0009] The upper and lower double ball bearing support provides a more even load-bearing capacity and a more stable rotation center compared to single-point or single-row bearings. This allows the feeding tube to rotate easily even when bearing the weight of the material column, effectively preventing uneven wear and jamming, and reducing running resistance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of water-cooled jacket one.

[0012] In the diagram: 1. Furnace opening; 2. Feeding pipe; 3. Water-cooled sleeve one; 4. Fixing ring; 5. Water-cooled sleeve two; 6. Connecting pipe; 7. Support ring; 8. Ball bearing plate; 9. Water inlet pipe one; 10. Water outlet pipe one; 11. Baffle one; 12. Water inlet pipe two; 13. Water outlet pipe two; 14. Baffle two; 15. Protective sleeve. Detailed Implementation

[0013] See attached document Figure 1-2 A charging connector for a submerged arc furnace includes a furnace opening 1; a charging pipe 2 is located at the top of the furnace opening 1, and a water-cooled sleeve 3 is fixedly sleeved on the outer wall of the charging pipe 2. Fixing rings 4 are fixedly connected to the top and bottom of the outer wall of the water-cooled sleeve 3. A second water-cooled sleeve 5 is sleeved at the bottom of the charging pipe 2, with a gap between the second water-cooled sleeve 5 and the charging pipe 2. The second water-cooled sleeve 5 is fixedly connected to the top of the furnace opening 1, and a connecting pipe 6 is fixedly connected to the top outer wall of the second water-cooled sleeve 5. A support ring 7 is fixedly connected to the top of the inner wall of the connecting pipe 6, and the support ring 7 is located between the two fixing rings 4. The top and bottom of ring 7 are both equipped with ball bearing discs 8. The support ring 7 is rotatably connected to two fixed rings 4 through two ball bearing discs 8 respectively. The top of the outer wall of water-cooled sleeve 1 3 is fixedly connected to water inlet pipe 1 9 and water outlet pipe 1 10. The inner wall of water-cooled sleeve 1 3 is fixedly connected to partition 1 11, which is located between water inlet pipe 1 9 and water outlet pipe 1 10. The outer wall of water-cooled sleeve 2 5 is fixedly connected to water inlet pipe 2 12 and water outlet pipe 2 13. The inner wall of water-cooled sleeve 2 5 is fixedly connected to partition 2 14, which is located between water inlet pipe 2 12 and water outlet pipe 2 13.

[0014] A protective sleeve 15 is fixedly connected to the top of the outer wall of the water-cooled sleeve 3. The protective sleeve 15 covers the outside of the fixing ring 4 and the support ring 7, and there is a gap between the protective sleeve 15 and the connecting pipe 6.

[0015] Working process and principle:

[0016] Cooling water is injected into the water-cooled jacket 3 through the inlet pipe 9. Under the guidance of the baffle plate 11, the cooling water flows around the feed pipe 2 along the internal flow channel of the water-cooled jacket 3 and finally flows out from the outlet pipe 10, forming an independent cooling circuit. The water-cooled jacket 3 isolates the feed pipe 2 from the fixed ring 4 and the support ring 4, preventing the fixed ring 4, the support ring 4 and the ball bearing plate 8 from deforming at high temperature, maintaining stable rotation and preventing jamming.

[0017] Meanwhile, cooling water is injected into water-cooled jacket 5 through water inlet pipe 2 12. Under the guidance of baffle 2 14, the cooling water circulates in the key high-temperature area at the bottom of the feed pipe 2 and above the furnace opening 1, which strongly cools it and reduces the high-temperature gas at the furnace opening 1. Then it flows out from water outlet pipe 2 13 to form a second independent cooling circuit.

[0018] The feeding pipe 2 and its fixedly connected water-cooled sleeve 3 and fixing ring 4 are a unit that can be rotated as a whole.

[0019] When it is necessary to change the feeding angle or position, the feeding tube 2 rotates, and the rotational force is transmitted to the ball bearing plate 8 through the fixed ring 4. Due to the presence of the upper and lower ball bearing plates 8, the feeding tube 2 can rotate smoothly.

[0020] The ball bearing plate 8 is covered by a protective sleeve 15, which effectively prevents high-temperature dust overflowing from the furnace opening, molten material splashing, or external foreign objects from entering the precision moving parts such as the ball bearing plate 8, ensuring its long-term operational reliability.

[0021] Water-cooled sleeve 3 separates the feeding pipe 2 from the ball bearing plate 8, while water-cooled sleeve 5 cools the high-temperature zone of the furnace opening 1. This design isolates the fixing ring 4, support ring 7, and ball bearing plate 8 from extreme heat sources, ensuring that they always operate at a lower temperature. This fundamentally solves the "jamming" problem caused by high-temperature thermal deformation and greatly improves the reliability and lifespan of the equipment.

[0022] The upper and lower double ball bearing discs 8 provide a more even load-bearing capacity and a more stable rotation center compared to single-point or single-row bearings. This allows the feeding tube 2 to rotate easily when bearing the weight of the material column, effectively preventing uneven wear and jamming, and reducing running resistance.

Claims

1. A charging joint for a submerged arc furnace, comprising a furnace opening (1), characterized in that, The top of the furnace opening (1) has a feeding pipe (2), and a water-cooled sleeve (3) is fixedly sleeved on the outer wall of the feeding pipe (2). The top and bottom of the outer wall of the water-cooled sleeve (3) are fixedly connected to fixing rings (4). The bottom of the feeding pipe (2) is fitted with a water-cooled sleeve (5). There is a gap between the water-cooled sleeve (5) and the feeding pipe (2). The water-cooled sleeve (5) is fixedly connected to the top of the furnace opening (1). A connecting pipe (6) is fixedly connected to the top outer wall of the water-cooled sleeve (5). A support ring (7) is fixedly connected to the top of the inner wall of the connecting pipe (6). The support ring (7) is located between the two fixing rings (4). The top and bottom of the support ring (7) are fixedly connected to the support ring (4). There is a ball bearing plate (8), and the support ring (7) is rotatably connected to two fixed rings (4) through two ball bearing plates (8). The top of the outer wall of the water cooling sleeve 1 (3) is fixedly connected to the water inlet pipe 1 (9) and the water outlet pipe 1 (10). The inner wall of the water cooling sleeve 1 (3) is fixedly connected to the partition plate 1 (11), which is located between the water inlet pipe 1 (9) and the water outlet pipe 1 (10). The outer wall of the water cooling sleeve 2 (5) is fixedly connected to the water inlet pipe 2 (12) and the water outlet pipe 2 (13). The inner wall of the water cooling sleeve 2 (5) is fixedly connected to the partition plate 2 (14), which is located between the water inlet pipe 2 (12) and the water outlet pipe 2 (13).

2. The charging joint for a submerged arc furnace according to claim 1, characterized in that, A protective sleeve (15) is fixedly connected to the top of the outer wall of the water-cooled sleeve (3). The protective sleeve (15) covers the outside of the fixing ring (4) and the support ring (7). There is a gap between the protective sleeve (15) and the connecting pipe (6).

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