A high-silicon silicomanganese alloy closed submerged arc furnace

Abstract

The present invention is applicable to the technical field of submerged arc furnaces, and provides a closed submerged arc furnace for high-silicon ferrosilicon manganese alloy. By virtue of the feature that the electrodes need to be lifted and lowered, when the electrodes are lifted and lowered, the fixed disk is driven to be lifted and lowered. The lifting and lowering of the fixed disk drive the telescopic screws of each clamping member to be lifted and rotated, thereby driving the scissor structure to expand or contract laterally, and further enabling the clamping degree of the arc-shaped clamping pieces on the sealing ring to be different, so as to achieve clamping the sealing ring to maintain a sealed state after the electrodes are lowered; conversely, when the electrodes are lifted, the sealing ring is loosened to facilitate the loosening of the electrodes and avoid large friction between the sealing ring and the electrodes. At the same time, by arranging a water channel in the sealing ring, on the one hand, it is used to dissipate the heat on the sealing ring, and on the other hand, it is used to change the expansion degree of the insulating flexible sealing ring, so that no matter how much the sealing ring is consumed due to friction, the wrapping degree of the sealing ring on the outer wall of the electrode can always be controlled by the water injection volume of the water channel.

Description

Technical Field

[0001] The present invention belongs to the technical field of submerged arc furnaces, and particularly relates to a closed submerged arc furnace for high-silicon ferrosilicon manganese alloy. Background Art

[0002] A submerged arc furnace is also called an electric arc furnace or a resistance furnace. It is mainly used for reducing and smelting raw materials such as ores, carbonaceous reducing agents, and solvents. It mainly produces ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, and ferrosilicon manganese alloy, and is an important industrial raw material in the metallurgical industry and chemical raw materials such as calcium carbide. Its working characteristics are that it uses carbonaceous or magnesia refractory materials as the furnace lining and uses self-baking electrodes. The electrodes are inserted into the furnace charge for submerged arc operation. The energy of the electric arc and the current passing through the furnace charge generate energy due to the resistance of the furnace charge to smelt the metal. The materials are continuously fed, the slag and iron are discharged intermittently, and it is an industrial electric furnace with continuous operation. The load of the submerged arc furnace transformer is continuous and stable, with a low impedance voltage, more voltage regulation levels, a small step difference, and a strong overload capacity. It can be divided into two types: on-load and no-excitation voltage regulation. Generally, the first few levels output at a constant capacity, and the last few levels output at a constant current. A submerged arc furnace is an industrial electric furnace with a huge power consumption. It mainly consists of a furnace shell, a furnace cover, a furnace lining, a short network, a water cooling system, a smoke exhaust system, a dust removal system, an electrode shell, an electrode pressure release and lifting system, a feeding and discharging system, a holder, a burner, a hydraulic system, a submerged arc furnace transformer, and various electrical equipment.

[0003] The electrodes in the submerged arc furnace are lifted and lowered in the furnace under the action of the lifting system, so that they can be inserted into the middle of the furnace charge for submerged arc operation. However, due to the lifting of the electrodes, the sealing device at the connection between the electrodes and the furnace cover is frequently rubbed, resulting in wear of the sealing device. It is consumed quickly and is also prone to leakage, causing safety accidents. Summary of the Invention

[0004] The present invention provides a closed submerged arc furnace for high-silicon ferrosilicon manganese alloy, aiming to solve the problems raised in the above background art.

[0005] The present invention is implemented as follows. A closed submerged arc furnace for high-silicon ferrosilicon manganese alloy includes a furnace shell and a furnace cover covering the furnace shell. A through hole is provided on the furnace cover for the lifting movement of the electrodes. A sealing ring with adjustable expansion is provided between the through hole and the outer wall of the electrodes. A clamping assembly is provided outside the sealing ring to adjust the clamping degree of the sealing ring as the electrodes are lifted and lowered.

[0006] Preferably, one side of the sealing ring that fits the outer wall of the electrodes is provided with a widened layer, and the widened layer is made of an insulating flexible material.

[0007] Preferably, a water channel is provided inside the sealing ring, and a water inlet is provided on the upper surface of the sealing ring for increasing or decreasing the amount of water inside.

[0008] Preferably, an annular protrusion is provided on the bottom surface of the sealing ring, and the annular protrusion is inserted and fitted with an annular groove on the bottom wall of the through hole.

[0009] Preferably, the clamping assembly includes a plurality of individual clamping members composed of a telescopic screw rod, a scissor structure, and an arc-shaped clamping piece, and the plurality of clamping members are annularly arranged outside the sealing ring.

[0010] Preferably, in each clamping member, the telescopic screw rod drives the scissor structure to open and close by moving up and down, the arc-shaped clamping piece is installed at one end of the scissor structure, the inner side wall of the arc-shaped clamping piece fits the side wall of the sealing ring, and the other end of the scissor structure is installed on the inner side wall of the through hole.

[0011] Preferably, the scissor structure is composed of two upper and lower linked parallelograms. The upper parallelogram is smaller than the lower parallelogram. The lower hinge point of the upper parallelogram is rotatably connected to the lower end of the telescopic screw rod, and the upper hinge point is screwed to the telescopic screw rod. The left hinge point of the lower parallelogram is slidably connected to a first vertical groove provided on the side wall of the through hole through a first sliding foot, and the right hinge point is slidably connected to a second vertical groove provided on the side wall of the arc-shaped clamping piece through a second sliding foot.

[0012] Preferably, the telescopic screw rod includes two parts, an upper multi-stage sleeve rod and a lower threaded rod. The upper end of the upper multi-stage sleeve rod is hinged and fixed to the bottom surface of the electrode fixing plate, and the lower end of the lower threaded rod is screwed to the scissor structure.

[0013] Preferably, a sealing ring is also provided on the part of the electrode located inside the furnace shell, and a flange is provided on the sealing ring and inserted into a concave ring groove on the inner surface of the furnace cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In a high-silicon ferrosilicon manganese alloy closed submerged arc furnace of the present invention, due to the characteristic that the electrode needs to be lifted and lowered, when the electrode is lifted and lowered, the fixing plate is driven to be lifted and lowered at the same time. The lifting and lowering of the fixing plate drive the telescopic screw rod of each clamping member to be lifted and rotated, thereby driving the scissor structure to expand or contract horizontally, and further making the clamping degree of the arc-shaped clamping piece on the sealing ring different. After the electrode descends, the sealing ring is clamped to maintain a sealed state; conversely, when the electrode rises, the sealing ring is loosened to facilitate the loosening of the electrode, avoiding large friction between the sealing ring and the electrode, and ensuring the long-term use of the sealing ring.

[0015] At the same time, by arranging a water channel in the sealing ring, on the one hand, it is used to dissipate the heat on the sealing ring, and on the other hand, it is used to change the expansion degree of the insulating flexible sealing ring, so that no matter how much the sealing ring is consumed due to friction, the wrapping degree of the sealing ring on the outer wall of the electrode can always be controlled by the water injection volume of the water channel, ensuring the firmness of the seal between the two. Description of the Drawings

[0016] Figure 1 is a schematic cross-sectional structure diagram of the present invention;

[0017] Figure 2 is Figure 1 a schematic enlarged view of the structure at position A in

[0018] Figure 3 is a schematic diagram of the clamping structure of the arc-shaped clip and the sealing ring in the present invention;

[0019] In the figure:

[0020] 1. Furnace shell;

[0021] 2. Furnace cover; 21. Through hole; 22. Annular groove; 23. Concave annular groove;

[0022] 3. Electrode; 31. Fixed disk; 32. Sealing ring; 33. Flange;

[0023] 4. Sealing ring; 41. Widened layer; 42. Water channel; 43. Water inlet; 44. Annular protrusion;

[0024] 5. Clamping assembly; 51. Telescopic screw; 511. Upper multi-stage sleeve rod; 512. Lower threaded rod; 52. Scissor structure; 53. Arc-shaped clip. Specific embodiments

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Please refer to Figures 1 - 3 , the present invention provides a technical solution: a high-silicon silicomanganese alloy closed submerged arc furnace, including a furnace shell 1 and a furnace cover 2 covering the furnace shell 1, and a through hole 21 is opened on the furnace cover 2 for the lifting movement of the electrode 3, and an expandable sealing ring 4 is provided between the through hole 21 and the outer wall of the electrode 3, and a clamping assembly 5 is provided outside the sealing ring 4 to adjust the clamping degree of the sealing ring 4 as the electrode 3 moves up and down.

[0027] In this embodiment, in cooperation with the feature that the electrode 3 needs to be reinserted into the furnace charge during use, it is set that after the electrode 3 descends, the sealing ring 4 is clamped to maintain a sealed state; conversely, when the electrode 3 ascends, the sealing ring 4 is loosened to facilitate the loosening of the electrode 3 and avoid large friction between the sealing ring 4 and the electrode 3, ensuring the long-term use of the sealing ring 4.

[0028] One side of the sealing ring 4 that fits the outer wall of the electrode 3 is provided with a widened layer 41, and the widened layer 41 is made of an insulating flexible material.

[0029] In this embodiment, a widened layer 41 is provided on one side of the sealing ring 4 close to the electrode 3. On the one hand, it increases the fitting area with the outer wall of the electrode 3 to ensure the sealing strength. On the other hand, the widened layer 41 is provided for frictional consumption to prevent the sealing ring 4 from being quickly consumed. The widened layer 41 is set to be insulating to isolate the electrode 3 and prevent conduction. At the same time, it is made of a flexible material. On the one hand, it cooperates with the water channel 42 to control the expansion degree, which is convenient for filling the gap between the through hole 21 and the electrode 3. On the other hand, the flexible material can better fit the outer wall of the electrode 3.

[0030] A water channel 42 is provided inside the sealing ring 4. The water channel 42 is provided with a water inlet 43 on the upper surface of the sealing ring 4 for increasing or decreasing the internal water volume.

[0031] In this embodiment, a water channel 42 is provided inside the sealing ring 4. Water is injected into the water channel 42 of the sealing ring 4 through the water inlet 43. On the one hand, it is used to cool the sealing ring 4 to prevent the heat of the electrode 3 from being transferred to the sealing ring 4 and affecting the service life of the sealing ring 4. On the other hand, by filling the water in the water channel 42 or controlling how much water is lacking, the fullness of the sealing ring 4 is controlled, and then the diameter of the sealing ring 4 is controlled. Finally, the filling of the gap between the through hole 21 and the electrode 3 by the sealing ring 4 is controlled to ensure that the sealing ring 4 always maintains a tight fit with the electrode 3 when sealing is required.

[0032] An annular protrusion 44 is provided on the bottom surface of the sealing ring 4, and the annular protrusion 44 is inserted and matched with the annular groove 22 on the bottom wall of the through hole 21.

[0033] In this embodiment, an annular protrusion 44 is provided on the bottom surface of the sealing ring 4 and is inserted into the annular groove 22 on the bottom surface of the through hole 21. On the one hand, it is used to position the sealing ring 4 to prevent the sealing ring 4 from shifting or the like. On the other hand, it is used to simply seal the gap between the sealing ring 4 and the through hole 21 to prevent leakage of the gap between the two.

[0034] The clamping assembly 5 includes a plurality of individual clamping members composed of a telescopic screw 51, a scissor structure 52, and an arc-shaped clamping piece 53. The plurality of clamping members are annularly arranged outside the sealing ring 4. In each clamping member, the telescopic screw 51 drives the scissor structure 52 to open and close by moving up and down. The arc-shaped clamping piece 53 is installed at one end of the scissor structure 52, and the inner side wall of the arc-shaped clamping piece 53 fits the side wall of the sealing ring 4. The other end of the scissor structure 52 is installed on the inner side wall of the through hole 21.

[0035] In this embodiment, the lifting of the electrode 3 drives the lifting of the fixed disk 31. The lifting of the fixed disk 31 drives the telescopic screw 51 of each clamping member to lift and rotate, thereby driving the scissor structure 52 to expand or contract laterally, and further making the clamping degree of the arc-shaped clamping piece 53 on the sealing ring 4 different.

[0036] In this embodiment, a plurality of single clamping members are annularly arranged around the sealing ring 4. Each clamping member synchronously adjusts the clamping tightness by the lifting of the fixed disk 31, so as to clamp the sealing ring 4 to maintain the sealed state after the electrode 3 descends. Conversely, when the electrode 3 ascends, the sealing ring 4 is loosened to facilitate the release of the electrode 3, avoiding large friction between the sealing ring 4 and the electrode 3 and ensuring the long-term use of the sealing ring 4.

[0037] The scissors structure 52 is composed of two upper and lower linked parallelograms. The upper parallelogram is smaller than the lower parallelogram. The lower hinge point of the upper parallelogram is rotatably connected to the lower end of the telescopic screw rod 51, and the upper hinge point is screwed to the telescopic screw rod 51. The left hinge point of the lower parallelogram is slidably connected to the first vertical groove opened on the side wall of the through hole 21 through the first sliding foot, and the right hinge point is slidably connected to the second vertical groove opened on the side wall of the arc-shaped clip 53 through the second sliding foot.

[0038] In this embodiment, the lowermost end of the lower threaded rod 512 and the lower hinge point of the upper parallelogram are fixed for idle rotation, that is, realized through a bearing. The lower section of the lower threaded rod 512 is screwed to the nut of the upper hinge point of the upper parallelogram. Thus, when the lower threaded rod 512 rotates, the position of the nut at the upper hinge point on it changes, and then the distance between the upper hinge point and the lower hinge point changes, thereby deforming the upper parallelogram. The part between the upper parallelogram and the lower parallelogram is set with the same rod, so they are in a linked form, and then the lower parallelogram undergoes the same change. The lower parallelogram drives the horizontal distance to change. Since one side is the inner wall of the through hole 21, it can only push the arc-shaped clip 53 on the other movable side to move, and finally change the positions of each arc-shaped clip 53 to realize the adjustment of the clamping tightness of the middle sealing ring 4.

[0039] The telescopic screw rod 51 includes two parts: an upper multi-stage sleeve rod 511 and a lower threaded rod 512. The upper end of the upper multi-stage sleeve rod 511 is hinged and fixed to the bottom surface of the fixed disk 31 of the electrode 3, and the lower end of the lower threaded rod 512 is screwed to the scissors structure 52.

[0040] In this embodiment, the upper end of the multi-stage sleeve rod 511 is hinged and fixed to the bottom surface of the electrode 3 fixing plate 31. Thus, when the electrode 3 moves up and down to drive the fixing plate 31 to move up and down accordingly, the fixing plate 31 drives the multi-stage sleeve rod 511 to expand or contract step by step. The multi-stage sleeve rod 511 is set to contract step by step in advance when descending and to expand step by step finally when ascending. The lower threaded rod 512 and the lowest rod of the multi-stage sleeve rod 511 are in a form of sleeve screw connection, that is, the lower threaded rod 512 can be rotated and retracted into the lowest rod. Thus, when the multi-stage sleeve rod 511 cannot move, the lower threaded rod 512 expands, contracts and rotates.

[0041] A sealing ring 32 is also provided on the part of the electrode 3 inside the furnace shell 1. A flange 33 is provided on the sealing ring 32 and is inserted into the concave ring groove 23 on the inner surface of the furnace cover 2.

[0042] In this embodiment, a sealing ring 32 is provided on the part of the electrode 3 inside the furnace shell 1. Thus, the sealing ring 32 can be limited when rising to the vertex. At the same time, the sealing ring 32 can be attached to the lower surface of the furnace cover 2. With the flange 33 provided on the upper surface of the sealing ring 32 inserted into the concave ring groove 23 on the lower surface of the furnace cover 2, the gap between the through hole 21 and the electrode 3 after the sealing ring is loosened is blocked to avoid leakage.

[0043] The working principle and usage process of the present invention: After the present invention is installed, when the lifting system of the electrode 3 drives the electrode 3 to descend in the furnace shell 1, as the electrode 3 descends, the fixing plate 31 on the electrode 3 also descends. The descent of the fixing plate 31 drives the multi-stage sleeve rod 511 of the telescopic screw rod 51 fixed to its lower surface to contract step by step until all contractions are completed. Then, it continues to descend to drive the lower threaded rod 512 to rotate. The rotation of the lower threaded rod 512 drives the upper hinge point nut sleeved and screwed on its outer wall to move up and down accordingly, so as to compress the distance between the upper hinge point and the lower hinge point of the upper parallelogram above, thereby longitudinally compressing the upper parallelogram and the lower parallelogram above, that is, the entire scissor structure 52, causing its transverse expansion. The left hinge point of the lower parallelogram abuts against the wall of the through hole 21, so that the right hinge point of the lower parallelogram pushes the arc-shaped clamping piece 53 to close in the middle, clamping the sealing ring 4 in the middle, tightening the sealing ring 4 in the middle, and clamping and fixing the electrode 3 inserted into the furnace charge to achieve the sealing effect.

[0044] When the electrode 3 is pulled out of the charge by the lifting system and moves upward, the fixed disk 31 also rises accordingly. The fixed disk 31 drives the upper multi-stage sleeve rod 511 to move upward. The upper multi-stage sleeve rod 511 drives the lower threaded rod 512 to move upward and rotate. The lower threaded rod 512 is driven to rotate. The rotation of the lower threaded rod 512 drives the upper hinge point of the upper parallelogram of the scissor structure 52 to slowly move upward, thereby longitudinally stretching and laterally contracting the entire scissor structure 52. As a result, the right hinge point of the lower parallelogram pulls the arc-shaped clip 53 outward, releasing the clamping on the sealing ring 4. Thus, the clamping of the sealing ring 4 on the electrode 3 is also relaxed, and further, the electrode 3 can be pulled out more smoothly and easily, reducing the friction between the two. When the lower threaded rod 512 has completed all rotations, the upper multi-stage sleeve rod 511 expands step by step until it is fully opened. At the same time, during the upward movement of the electrode 3, the sealing knot ring 32 fits against the lower surface of the furnace cover 2, and the flange 33 on the upper surface of the sealing knot ring 32 is inserted into the concave ring groove 23 to achieve the sealing of the through hole 21.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-silicon silicomanganese alloy closed submerged arc furnace, characterized in that: It includes a furnace shell (1) and a furnace cover (2) covering the furnace shell (1). A through hole (21) is opened on the furnace cover (2) for the lifting movement of the electrode (3). A sealing ring (4) with adjustable expansion is arranged between the through hole (21) and the outer wall of the electrode (3). A clamping assembly (5) for adjusting the clamping degree of the sealing ring (4) as the electrode (3) lifts and lowers is arranged outside the sealing ring (4); the clamping assembly (5) includes a plurality of single clamping members composed of a telescopic screw rod (51), a scissor structure (52), and an arc-shaped clamping piece (53). The plurality of clamping members are annularly arranged outside the sealing ring (4); the telescopic screw rod (51) drives the scissor structure (52) to open and close by moving up and down. The arc-shaped clamping piece (53) is installed at one end of the scissor structure (52). The inner side wall of the arc-shaped clamping piece (53) fits the side wall of the sealing ring (4). The other end of the scissor structure (52) is installed on the inner side wall of the through hole (21); the scissor structure (52) is composed of two upper and lower linked parallelograms. The upper parallelogram is smaller than the lower parallelogram. The lower hinge point of the upper parallelogram is rotatably connected to the lower end of the telescopic screw rod (51), and the upper hinge point is screwed to the telescopic screw rod (51). The left hinge point of the lower parallelogram is slidably connected to the first vertical groove opened on the side wall of the through hole (21) through a first sliding foot, and the right hinge point is slidably connected to the second vertical groove opened on the side wall of the arc-shaped clamping piece (53) through a second sliding foot; the telescopic screw rod (51) includes two parts, an upper multi-stage sleeve rod (511) and a lower threaded rod (512). The upper end of the upper multi-stage sleeve rod (511) is hinged and fixed to the bottom surface of the fixed disk (31) of the electrode (3), and the lower end of the lower threaded rod (512) is screwed to the scissor structure (52).

2. A high-silicon silicomanganese alloy closed submerged arc furnace according to claim 1, characterized in that: One side of the sealing ring (4) that fits the outer wall of the electrode (3) is provided with a widened layer (41), and the widened layer (41) is made of an insulating flexible material.

3. A high-silicon silicomanganese alloy closed submerged arc furnace according to claim 1, characterized in that: A water channel (42) is arranged inside the sealing ring (4). A water inlet (43) is arranged on the upper surface of the sealing ring (4) for increasing or decreasing the internal water volume.

4. A high-silicon silicomanganese alloy closed submerged arc furnace according to claim 1, characterized in that: An annular protrusion (44) is opened on the bottom surface of the sealing ring (4), and the annular protrusion (44) is inserted and matched with the annular groove (22) on the bottom wall of the through hole (21).

5. A high-silicon silicomanganese alloy closed submerged arc furnace according to claim 1, characterized in that: A sealing knot ring (32) is also arranged on the part of the electrode (3) located inside the furnace shell (1). A flange (33) is arranged on the sealing knot ring (32) and is inserted into the concave ring groove (23) on the inner surface of the furnace cover (2).

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