Dry-type furnace cover structure of submerged arc refining furnace

Abstract

The invention relates to the technical field of refining furnace dry type furnace covers, in particular to a submerged arc refining furnace dry type furnace cover structure which comprises a furnace cover body, three electrode holes are formed in the furnace cover body, four feeding holes are formed in the furnace cover body, two smoke discharging and dust removing holes are formed in the furnace cover body, and a fixing column is fixedly connected to the upper surface of the furnace cover body. A movable seat is arranged on the fixed column in a sliding fit mode, a rotating frame is arranged on the movable seat in a rotating connection mode, a transmission mechanism is fixedly arranged on the rotating frame in a connecting mode, and a furnace cover maintenance mechanism is arranged in the rotating frame in a rotating connection mode. Periodically cleaning the inner wall of the furnace cover can effectively reduce corrosion of high temperature and molten steel residues to the material of the furnace cover, prolong the service life of the furnace cover, effectively improve the heat conduction efficiency in the furnace, reduce heat loss, and contribute to stabilizing the temperature in the furnace and improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of dry-type furnace covers for refining furnaces, and in particular to a dry-type furnace cover structure for a mineral heat refining furnace. Background Art

[0002] The dry type furnace cover of the submerged arc refining furnace is one of the important components of the submerged arc refining furnace equipment. It is mainly used to prevent the loss of heat in the furnace during high-temperature smelting and ensure the stability of the smelting process. Submerged arc refining furnaces are usually used for smelting metals, ore refining and the production of some special metal alloys (such as high carbon ferrochrome, ferrosilicon, etc.), and the role of the furnace cover is crucial.

[0003] In the past, most ferroalloy smelting ore hot refining furnaces used water-cooled furnace covers, including multiple furnace cover flaps and water distributors. The furnace cover flaps are equipped with electrode column mounting holes, material discharge ports and smoke exhaust ports, and the cover flaps are spliced ​​and fixed by connectors. The water distributor is equipped with instruments for measuring water temperature, water pressure, flow, etc., and a water pipeline is laid between the water-cooled furnace cover and the water distributor. The following are the disadvantages of water-cooled furnace covers: High cost: The initial investment cost of the water-cooled furnace cover is relatively high, and it requires a considerable amount of instrumentation and automation control, which may be a burden for companies with limited budgets. Complex maintenance: The water-cooled furnace cover may have problems such as leakage. Once a failure occurs, repair and maintenance may be complicated. Dependence on water resources: The water-cooled furnace cover requires a stable supply of water resources, which may become a problem in areas with scarce water resources. Increased energy consumption: Although the water-cooled furnace cover itself can reduce the temperature of the equipment, it also takes away a considerable amount of heat, which may increase the overall energy consumption.

[0004] In the existing dry-type furnace cover of the thermal refining furnace, raw materials need to be added gradually during the smelting process to ensure the continuity and stability of the reaction process in the furnace. During the feeding process, especially when adding raw materials to the high-temperature furnace, the temperature in the smelting furnace is usually very high. If the raw materials or scrap steel react violently with the molten steel (such as oxidation reaction) when they are put into the furnace, or a large amount of cooled raw materials are suddenly added, it will cause the molten steel to splash violently. If the way the raw materials are put in is not stable enough, or the speed of putting in is too fast, it is also easy to cause the molten steel to splash. For example, directly adding a large amount of raw materials or too fast into the furnace may cause the surface of the molten steel to fluctuate violently, causing the molten steel to splash onto the inner wall of the furnace cover, thereby affecting the normal operation of the furnace cover and reducing its service life.

[0005] In summary, the prior art lacks a technology for automatically maintaining the inner wall molten steel of the dry-type furnace cover of a thermal refining furnace. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a dry type furnace cover structure of a thermal refining furnace.

[0007] In order to achieve the above objectives, the technical solution adopted by the present invention is: a dry-type furnace cover structure of a mineral thermal refining furnace, including a furnace cover body, three electrode holes are opened on the furnace cover body, four feeding holes are opened on the furnace cover body, two smoke exhaust and dust removal holes are opened on the furnace cover body, a fixed column is fixedly provided on the upper surface of the furnace cover body, a movable seat is slidably provided on the fixed column, a rotating frame is rotatably connected to the movable seat, a transmission mechanism is fixedly connected to the rotating frame, and a furnace cover maintenance mechanism is rotatably provided in the rotating frame.

[0008] Preferably, an insulating member is fixedly connected to the lower surface of the furnace cover body, a plurality of lifting ears are fixedly connected to the furnace cover body, and refractory bricks are stacked on the inner wall of the lower end of the furnace cover body.

[0009] Preferably, an electrode sealing sleeve is provided in the electrode hole, and a feeding sleeve is provided in the feeding hole.

[0010] Preferably, a motor is connected and fixedly arranged on the fixed column, an output end of the motor extends into the fixed column and is connected and fixedly arranged with a threaded rod, and the threaded rod is threadably connected to the movable seat.

[0011] Preferably, sealing covers are fixedly connected to both the upper and lower ends of the rotating frame, and the sealing covers are slidingly matched with the furnace cover body. A meshing wheel is rotatably connected to the upper end of the rotating frame, and an adjusting wheel is fixedly connected to one side of the meshing wheel. An annular rack A is fixedly connected to the movable seat, and the annular rack A is meshed with the adjusting wheel for transmission. An annular rack B is fixedly connected to the inner wall of the bottom end of the rotating frame.

[0012] Preferably, the transmission mechanism includes an electric push rod, which is fixedly connected to the rotating frame, a moving rod is fixedly connected to the electric push rod, the moving rod is slidingly matched with the rotating frame, and one end of the moving rod located in the rotating frame is fixedly connected to a rack.

[0013] Preferably, one side of the top end of the moving rod is rotatably connected with a plurality of meshing teeth in a linear structure, a tension spring is fixedly connected to the meshing teeth, the other end of the tension spring is fixedly connected to the moving rod, and the meshing teeth are meshed with the meshing wheel for transmission.

[0014] Preferably, the furnace cover maintenance mechanism includes a swing frame, one end of the swing frame is rotatably connected to the rotating frame, the end of the swing frame close to the rack is connected and fixedly provided with a gear, the gear and the rack are meshingly transmitted, a transmission sleeve is rotatably connected to the swing frame, one end of the transmission sleeve is connected and fixedly provided with a driven wheel, one side of the driven wheel is meshingly transmitted with a toothed disk, the toothed disk is rotatably connected to the swing frame, one end of the toothed disk is connected and fixedly provided with a driving wheel, and the driving wheel is meshingly transmitted with the annular rack B.

[0015] Preferably, a movable frame is slidingly provided inside the swing frame, and one end of the movable frame located inside the swing frame is connected and fixedly provided with a plurality of springs, and the other end of the spring is connected and fixedly provided with an inner wall of the swing frame, and a scraper steel brush wheel is slidingly provided at the outer end of the movable frame, and a transmission rod is rotatably connected to the movable frame, one end of the transmission rod is slidingly provided with an inner wall of a transmission sleeve, and the other end of the transmission rod is arranged in an L-shaped structure, and an opening block is slidingly provided at one end of the L-shaped structure of the movable frame, and the inner wall of one end of the opening block is arranged in sliding contact with the scraper steel brush wheel, and the inner wall of the other end of the opening block is slidingly provided with the outer wall of the transmission rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. During the use of the furnace cover, the furnace cover maintenance mechanism is used. Driven by the transmission mechanism, the swing frame swings back and forth. Under the action of the spring, the scraper steel brush wheel sticks to the inner wall of the furnace cover. At the same time, the scraper steel brush wheel moves back and forth horizontally. Through the automatic cleaning mechanism, it can ensure that the inner wall of the furnace cover is always in a clean state, reducing the workload of manual cleaning. Regular cleaning of the inner wall of the furnace cover can effectively reduce the corrosion of the furnace cover material by high temperature and molten steel residue, extend the service life of the furnace cover, effectively improve the heat conduction efficiency in the furnace, reduce heat loss, and help stabilize the temperature in the furnace and improve production efficiency; 2. This technology adopts a fully dry waterless structure, so it overcomes the technical problem of water leakage, greatly improves the durability of the furnace cover, and is easy to repair and maintain, and has the advantages of greatly improving safety and economy. It does not require a large number of additional instruments and automatic control, is simple to operate, saves costs, has no demand for water resources, can save a lot of water resources, has a small burden on the overall equipment, can effectively insulate the temperature in the furnace, so that the temperature in the furnace does not leak out, and the overall smelting is more energy-saving and environmentally friendly; 3. By setting up a transmission mechanism, the furnace cover maintenance mechanism can be driven to swing back and forth to clean and maintain the inner wall of the furnace cover, while the rotating frame can be rotated intermittently, so that the furnace cover maintenance mechanism can clean and maintain various positions of the inner wall of the furnace cover. At the same time, by setting up a threaded rod, the rotating frame can be moved out of the furnace cover when no maintenance is required, without affecting the processing efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a dry-type furnace cover structure of a mineral heat refining furnace according to the present invention; Figure 2 It is a cross-sectional schematic diagram of the overall structure maintenance of a dry-type furnace cover structure of a mineral heat refining furnace according to the present invention; Figure 3 It is a cross-sectional expansion schematic diagram of the main structure of a dry-type furnace cover structure of a thermal refining furnace according to the present invention; Figure 4 It is a schematic diagram of the structure of the fixed column and other structures of the dry-type furnace cover structure of the thermal refining furnace of the present invention; Figure 5 It is a partial cross-sectional schematic diagram of a rotating frame structure of a dry-type furnace cover structure of a thermal refining furnace of the present invention; Figure 6 It is a schematic diagram of the transmission mechanism structure of a dry-type furnace cover structure of a thermal refining furnace according to the present invention; Figure 7 A schematic cross-sectional view of a side of a furnace cover maintenance mechanism structure of a dry-type furnace cover structure of a thermal refining furnace according to the present invention; Figure 8 It is a cross-sectional expansion schematic diagram of the other side of the furnace cover maintenance mechanism structure of a dry-type furnace cover structure of a thermal refining furnace of the present invention.

[0018] The following are marked in the figure: 1. furnace cover body; 2. electrode hole; 3. charging hole; 4. smoke exhaust and dust removal hole; 5. fixed column; 6. movable seat; 7. rotating frame; 8. transmission mechanism; 9. furnace cover maintenance mechanism; 101. insulating part; 102. lifting ear; 103. refractory brick; 201. electrode sealing sleeve; 301. charging sleeve; 501. motor; 502. threaded rod; 701. sealing cover; 702. meshing wheel; 703. adjusting wheel ; 704, annular rack B; 601, annular rack A; 801, electric push rod; 802, moving rod; 803, rack; 804, meshing teeth; 805, tension spring; 901, swing frame; 902, gear; 903, transmission sleeve; 904, driven wheel; 905, toothed disc; 906, driving wheel; 907, movable frame; 908, spring; 909, scraper steel brush wheel; 910, transmission rod; 911, opening block. DETAILED DESCRIPTION

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0020] like Figure 1-Figure 8 The dry type furnace cover structure of a mineral thermal refining furnace shown in the figure includes a furnace cover body 1, three electrode holes 2 are provided on the furnace cover body 1, four feeding holes 3 are provided on the furnace cover body 1, two smoke exhaust and dust removal holes 4 are provided on the furnace cover body 1, a fixed column 5 is connected and fixedly arranged on the upper surface of the furnace cover body 1, a movable seat 6 is slidably arranged on the fixed column 5, a rotating frame 7 is rotatably connected and arranged on the movable seat 6, a transmission mechanism 8 is connected and fixedly arranged on the rotating frame 7, and a furnace cover maintenance mechanism 9 is rotatably connected and arranged inside the rotating frame 7. The furnace cover body 1 adopts a semi-enclosed short smoke hood form, which is a fully dry waterless structure, and the top of the furnace cover body 1 is a spherical structure, and refractory knotting materials, aluminum silicate fiber blankets, zirconium-containing fiber modules and stainless steel anchors are laid inside.

[0021] like Figure 3 As shown, an insulating member 101 is fixedly connected to the lower surface of the furnace cover body 1 , a plurality of lifting ears 102 are fixedly connected to the furnace cover body 1 , and refractory bricks 103 are stacked on the inner wall of the lower end of the furnace cover body 1 .

[0022] like Figure 3 As shown, an electrode sealing sleeve 201 is arranged in the electrode hole 2, and a feeding sleeve 301 is arranged in the feeding hole 3.

[0023] like Figure 4 As shown, a motor 501 is connected and fixedly arranged on the fixed column 5, and the output end of the motor 501 extends into the fixed column 5 and is connected and fixedly arranged with a threaded rod 502, and the threaded rod 502 is threadedly connected with the movable seat 6. The threaded rod 502 is driven to rotate by the motor 501, so that the threaded rod 502 drives the movable seat 6 to move downward, so that the rotating frame 7 is inserted into the furnace cover body 1.

[0024] like Figure 4 , Figure 5 As shown, the upper and lower ends of the rotating frame 7 are connected and fixed with sealing covers 701, the sealing covers 701 are slidably matched with the furnace cover body 1, the upper end of the rotating frame 7 is rotatably connected with a meshing wheel 702, one side of the meshing wheel 702 is connected and fixed with an adjusting wheel 703, the movable seat 6 is connected and fixed with an annular rack A601, the annular rack A601 is meshed and driven with the adjusting wheel 703, and the inner wall of the bottom end of the rotating frame 7 is connected and fixed with an annular rack B704. The meshing wheel 702 drives the connected adjusting wheel 703 to rotate, and the adjusting wheel 703 is meshed with the fixed annular rack A601, so that the rotating frame 7 is rotated.

[0025] like Figure 6 As shown, the transmission mechanism 8 includes an electric push rod 801, which is connected and fixed to the rotating frame 7. A moving rod 802 is connected and fixed to the electric push rod 801. The moving rod 802 is slidably matched with the rotating frame 7. A rack 803 is connected and fixed to one end of the moving rod 802 located in the rotating frame 7. The electric push rod 801 drives the moving rod 802 to move up and down, so that the moving rod 802 drives the connected rack 803 to move. At this time, the rack 803 drives the gear 902 to rotate, so that the gear 902 drives the connected swing frame 901 to swing back and forth.

[0026] One side of the top of the moving rod 802 is provided with a plurality of meshing teeth 804 in a linear structure and rotatably connected, and a tension spring 805 is connected and fixedly provided on the meshing teeth 804, and the other end of the tension spring 805 is connected and fixedly provided with the moving rod 802, and the meshing teeth 804 are meshed and transmitted with the meshing wheel 702. When the electric push rod 801 drives the moving rod 802 to move upward, the meshing teeth 804 will be driven to move upward, and under the action of the tension spring 805, the meshing teeth 804 will mesh with the meshing wheel 702, thereby driving the meshing wheel 702 to rotate.

[0027] like Figure 7 , Figure 8 As shown, the furnace cover maintenance mechanism 9 includes a swing frame 901, one end of the swing frame 901 is rotatably connected to the rotating frame 7, one end of the swing frame 901 close to the rack 803 is connected and fixedly provided with a gear 902, the gear 902 and the rack 803 are meshingly arranged for transmission, a transmission sleeve 903 is rotatably connected to the swing frame 901, one end of the transmission sleeve 903 is connected and fixedly provided with a driven wheel 904, one side of the driven wheel 904 is meshingly arranged with a toothed disc 905, the toothed disc 905 is rotatably connected to the swing frame 901, one end of the toothed disc 905 is connected and fixedly provided with a driving wheel 906, and the driving wheel 906 is meshingly arranged for transmission with the annular rack B704.

[0028] A movable frame 907 is slidably provided inside the swing frame 901. One end of the movable frame 907 located inside the swing frame 901 is connected and fixed with multiple springs 908. The other end of the spring 908 is connected and fixed to the inner wall of the swing frame 901. A scraper steel brush wheel 909 is slidably provided at the outer end of the movable frame 907. A transmission rod 910 is rotatably connected on the movable frame 907. One end of the transmission rod 910 is slidably provided with the inner wall of the transmission sleeve 903, and the other end of the transmission rod 910 is arranged in an L-shaped structure. An opening block 911 is slidably provided at one end of the L-shaped structure of the movable frame 907. The inner wall of one end of the opening block 911 is slidably contacted with the scraper steel brush wheel 909, and the inner wall of the other end of the opening block 911 is slidably provided with the outer wall of the transmission rod 910. Under the action of the annular rack B704, the driving wheel 906 will rotate, and the driving wheel 906 will drive the connected toothed disc 905 to rotate, so that the toothed disc 905 drives the transmission sleeve 903 connected to the driven wheel 904 to rotate, and the transmission sleeve 903 will drive the transmission rod 910 to rotate, and then the transmission rod 910 will slide in the opening block 911 through the other end, thereby driving the opening block 911 to reciprocate, so that the opening block 911 drives the scraper steel brush wheel 909 to reciprocate.

[0029] Working principle: During the use of the ore-heated refining furnace, steel is added into the ore-heated refining furnace through the feeding hole 3. During the adding of steel, the molten steel will splash onto the inner wall of the furnace cover body 1; Then, the motor 501 is used to drive the threaded rod 502 to rotate, so that the threaded rod 502 drives the moving seat 6 to move downward, so that the rotating frame 7 is inserted into the furnace cover body 1, and the sealing cover 701 at the upper end of the rotating frame 7 seals the opening of the furnace cover body 1; Then, the electric push rod 801 is used to drive the moving rod 802 to move up and down, so that the moving rod 802 drives the connected rack 803 to move, and at this time, the rack 803 drives the gear 902 to rotate, so that the gear 902 drives the connected swing frame 901 to swing back and forth, and at this time, under the action of the spring 908, the scraper steel brush wheel 909 will stick to the inner wall of the furnace cover body 1; Then, under the action of the annular rack B704, the driving wheel 906 will rotate, and the driving wheel 906 will drive the connected toothed disc 905 to rotate, so that the toothed disc 905 drives the transmission sleeve 903 connected to the driven wheel 904 to rotate, and the transmission sleeve 903 will drive the transmission rod 910 to rotate, and then the transmission rod 910 will slide in the opening block 911 through the other end, thereby driving the opening block 911 to reciprocate, so that the opening block 911 drives the scraper steel brush wheel 909 to reciprocate, and clean the molten steel solidified material on the inner wall of the furnace cover body 1; When the electric push rod 801 drives the moving rod 802 to move upward, it will also drive the meshing teeth 804 to move upward. Under the action of the tension spring 805, the meshing teeth 804 will mesh with the meshing wheel 702, thereby driving the meshing wheel 702 to rotate, so that the meshing wheel 702 drives the connected adjusting wheel 703 to rotate. At this time, the adjusting wheel 703 will mesh with the fixed annular rack A601, thereby causing the rotating frame 7 to rotate, so that the scraper steel brush wheel 909 maintains and cleans various positions on the inner wall of the furnace cover main body 1. After cleaning, the rotating frame 7 is moved out of the furnace cover main body 1.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A dry type furnace cover structure of a mineral heat refining furnace, comprising a furnace cover body (1), characterized in that: The furnace cover body (1) is provided with three electrode holes (2), the furnace cover body (1) is provided with four feeding holes (3), the furnace cover body (1) is provided with two smoke exhaust and dust removal holes (4), a fixed column (5) is fixedly connected to the upper surface of the furnace cover body (1), a movable seat (6) is slidably provided on the fixed column (5), a rotating frame (7) is rotatably connected to the movable seat (6), a transmission mechanism (8) is fixedly connected to the rotating frame (7), and a furnace cover maintenance mechanism (9) is rotatably connected inside the rotating frame (7).

2. The dry type furnace cover structure of the thermal refining furnace according to claim 1 is characterized in that: An insulating member (101) is fixedly connected to the lower surface of the furnace cover body (1), a plurality of lifting ears (102) are fixedly connected to the upper surface of the furnace cover body (1), and refractory bricks (103) are stacked on the inner wall of the lower end of the furnace cover body (1).

3. The dry type furnace cover structure of the thermal refining furnace according to claim 1 is characterized in that: An electrode sealing sleeve (201) is arranged in the electrode hole (2), and a feeding sleeve (301) is arranged in the feeding hole (3).

4. The dry type furnace cover structure of the thermal refining furnace according to claim 1 is characterized in that: A motor (501) is fixedly connected to the fixed column (5); an output end of the motor (501) extends into the fixed column (5) and is fixedly connected to a threaded rod (502); the threaded rod (502) is threadedly connected to the movable seat (6).

5. The dry type furnace cover structure of the thermal refining furnace according to claim 1 is characterized in that: The upper and lower ends of the rotating frame (7) are both connected and fixedly provided with sealing covers (701), and the sealing covers (701) are slidably matched with the furnace cover body (1). The upper end of the rotating frame (7) is rotatably connected with a meshing wheel (702), and one side of the meshing wheel (702) is connected and fixedly provided with an adjusting wheel (703). The movable seat (6) is connected and fixedly provided with an annular rack A (601), and the annular rack A (601) is meshed with the adjusting wheel (703) for transmission. The inner wall of the bottom end of the rotating frame (7) is connected and fixedly provided with an annular rack B (704).

6. The dry type furnace cover structure of the thermal refining furnace according to claim 1 is characterized in that: The transmission mechanism (8) comprises an electric push rod (801), the electric push rod (801) being connected and fixedly arranged with the rotating frame (7), a moving rod (802) being connected and fixedly arranged with the electric push rod (801), the moving rod (802) being slidably matched with the rotating frame (7), and a rack (803) being connected and fixedly arranged with one end of the moving rod (802) located in the rotating frame (7).

7. The dry type furnace cover structure of the thermal refining furnace according to claim 6 is characterized in that: One side of the top end of the moving rod (802) is provided with a plurality of meshing teeth (804) in a linear structure and rotatably connected thereto, a tension spring (805) is fixedly connected to the meshing teeth (804), the other end of the tension spring (805) is fixedly connected to the moving rod (802), and the meshing teeth (804) are meshed and transmitted with the meshing wheel (702).

8. The dry type furnace cover structure of the thermal refining furnace according to claim 1 is characterized in that: The furnace cover maintenance mechanism (9) comprises a swing frame (901), one end of the swing frame (901) is rotatably connected to the rotating frame (7), one end of the swing frame (901) close to the rack (803) is connected and fixedly provided with a gear (902), the gear (902) and the rack (803) are meshingly arranged for transmission, a transmission sleeve (903) is rotatably connected to the swing frame (901), one end of the transmission sleeve (903) is connected and fixedly provided with a driven wheel (904), one side of the driven wheel (904) is meshingly arranged with a toothed disc (905), the toothed disc (905) is rotatably connected to the swing frame (901), one end of the toothed disc (905) is connected and fixedly provided with a driving wheel (906), the driving wheel (906) is meshingly arranged with the annular rack B (704) for transmission.

9. The dry type furnace cover structure of the thermal refining furnace according to claim 8, characterized in that: A movable frame (907) is slidably arranged inside the swing frame (901); one end of the movable frame (907) located inside the swing frame (901) is connected and fixedly arranged with a plurality of springs (908); the other end of the spring (908) is connected and fixedly arranged with the inner wall of the swing frame (901); a scraper steel brush wheel (909) is slidably arranged at the outer end of the movable frame (907); a transmission rod (910) is rotatably arranged on the movable frame (907); one end of the transmission rod (910) is slidably arranged with the inner wall of the transmission sleeve (903); the other end of the transmission rod (910) is arranged in an L-shaped structure; an opening block (911) is slidably arranged at one end of the movable frame (907) in the L-shaped structure; the inner wall of one end of the opening block (911) is slidably contacted with the scraper steel brush wheel (909); the inner wall of the other end of the opening block (911) is slidably arranged with the outer wall of the transmission rod (910).

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