High-carbon ferrochrome direct current furnace

Abstract

The invention belongs to the technical field of smelting, and particularly relates to a high-carbon ferrochrome direct current furnace which comprises a submerged arc furnace, a rectifier cabinet, an electrode shell pushing device, a furnace top trolley discharging system, a side supporting shaft and a furnace top feeding belt conveyor. The electrode shell pushing device is located at the top of an electrode column, the rectifier cabinet is electrically connected with the electrode column through a short net system, the electrode paste distribution trolley can be driven to do circular motion with a side supporting shaft as the axis through an arranged shaft type driving structure, and the distance between a second rolling wheel and a discharging port can be changed through an arranged protruding block. Under the cooperation of the guide groove and the convex block, the material blocking structure dynamically blocks the material outlet, so that materials can be sequentially distributed into a plurality of electrode shells without frequent start and stop of the electrode paste distribution trolley, and the energy consumption is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of smelting, and in particular relates to a high-carbon ferrochrome direct current furnace. Background Art

[0002] Submerged arc furnace is an industrial electric furnace used for high-temperature smelting of ores and metal raw materials. Its working principle is to convert electrical energy into thermal energy through electrodes, generate high-temperature electric arc or resistance heat in the furnace, melt the charge and cause chemical reaction, thereby extracting the target metal or compound. Chromium ore, coke and silica are smelted into high-carbon ferrochrome through the submerged arc furnace. The products currently used in the market mainly include AC-powered submerged arc furnaces, but when using AC, there is inductive reactance, which will generate reactive power loss in the short-circuit system, resulting in a decrease in power factor, increased energy consumption and cost. At the same time, when feeding electrode paste or ore into the electrode shell or ore bin, the existing feeding device usually adopts The electrode paste or mineral material is conveyed to the electrode shell or mineral material bin by a spiral conveyor rod or a sling, but the spiral conveyor rod or the sling can only feed a single electrode shell or mineral material bin and cannot flexibly feed multiple electrode shells. For the feeding needs of multiple electrode shells, it is necessary to install multiple sets of electrode paste feeding devices, which not only increases the preparation and maintenance costs, but also leads to increased energy consumption. When an electric feeding trolley is used for feeding, although multiple electrode shells or mineral material bins can be unloaded, when the number of electrode shells or mineral material bins is too large, the electric feeding trolley needs to be started and stopped frequently, resulting in an increase in the instantaneous current value of the drive motor and further increase in energy consumption. Summary of the invention

[0003] 1. Technical issues to be resolved The present invention provides a high carbon ferrochrome direct current furnace to solve the following problems.

[0004] 1. The existing feeding device has a single feeding method and cannot flexibly feed multiple electrode shells or ore bins.

[0005] 2. When there are too many electrode shells or ore bins, the use of an electric feeding trolley for unloading requires frequent starting and stopping of the trolley, which increases the instantaneous current value of the drive motor and further increases energy consumption.

[0006] (II) Technical content To achieve the above object, the present invention provides the following technical solutions: A high carbon ferrochrome direct current furnace comprises an ore-fired furnace, a rectifier cabinet, an electrode shell pusher, a furnace top trolley unloading system, a side support shaft and a furnace top feeding belt conveyor, the top of the ore-fired furnace is connected with a silo, an electrode column, a raw flue gas chimney and a clean flue gas chimney, the electrode shell pusher is located at the top of the electrode column, and the rectifier cabinet is electrically connected to the electrode column through a short network system; The furnace top trolley unloading system includes a guide docking base, on which a first annular guide rail and a guide platform are arranged, a unloading pipe is connected to the bottom of the guide docking base, and a pre-flow platform connected to the unloading pipe is arranged on the top, and the pre-flow platform is used to extend the unloading time; An axial drive structure is provided on the first annular guide rail, an electrode paste unloading trolley is fixedly connected to the top of the axial drive structure, a discharge port of the furnace top feeding belt conveyor is located above the electrode paste unloading trolley, a discharge port is provided at the bottom of the electrode paste unloading trolley, and a blocking structure is also provided at the bottom of the electrode paste unloading trolley; A guide groove is provided on the guide platform, and the blocking structure is in rolling contact with one side of the guide groove; The side support shaft is rotatably arranged on the ground and located at the axis center of the diversion docking base, and is used for auxiliary support of the electrode paste unloading trolley.

[0007] Furthermore, a plurality of lifting rings are provided on the diversion docking base; There are at least two groups of electrode columns, which are distributed in a circular pattern on the top of the submerged arc furnace. The electrode columns are divided into a holding tube and an electrode shell. The holding tube is connected to the submerged arc furnace, and the electrode shell is slidably connected in the holding tube, and the bottom of the electrode shell extends into the submerged arc furnace. The number of electrode shell pushing devices corresponds to the number of electrode shells, and the electrode shell pushing devices are sleeved on the corresponding electrode shells; The number of the feed pipes corresponds to the electrode shell pushing device one by one, and the feed pipes are detachably mounted on the electrode shell pushing device, and the feed pipes are connected to the electrode shell through the electrode shell pushing device.

[0008] Furthermore, there are at least two groups of silos, and the silos are distributed in a circular manner on the top of the submerged arc furnace.

[0009] Furthermore, an inner gear ring is provided on the inner side wall of the first annular guide rail, and the shaft-type driving structure includes a support seat and a gear, the support seat is slidably connected to the top of the first annular guide rail, a first driving motor is installed on one side of the support seat, a rotating shaft of the first driving motor passes through the support seat, and a gear is fixedly connected to the free end, the gear is meshed with the inner gear ring, first rolling wheels are rotatably connected to the two sides of the bottom of the support seat, and limiting rolling grooves are provided on the inner wall and the outer wall of the first annular guide rail, and the first rolling wheel is in rolling contact with the limiting rolling groove; The electrode paste unloading trolley is fixedly connected to the top of the support seat.

[0010] Furthermore, the pre-flow table is provided with an inclined arc surface, and the lower end of the arc surface is connected to the corresponding feed pipe; The guide groove is located between the pre-flow platform and the first annular guide rail, and a groove surface of the guide groove close to the pre-flow platform is provided with a plurality of protrusions corresponding to the pre-flow platform one by one; A plurality of avoidance grooves corresponding to the protrusions are arranged on the groove surface of the guide groove away from the pre-flow platform.

[0011] Furthermore, the bottom of the electrode paste unloading trolley is rotatably connected to a docking shaft, and the blocking structure includes a blocking plate and a pull rod. The blocking plate is located below the discharge port, and blocking edges are arranged on both sides of the blocking plate, and one end of the two blocking edges is rotatably connected to the docking shaft; An anti-interference slide groove is provided at the bottom of the blocking plate, a butt joint shaft head is slidably connected to the anti-interference slide groove, the bottom of the pull rod is slidably connected to the top of the guide platform, one end of the pull rod is rotatably connected to the butt joint shaft head, and the other end of the pull rod is rotatably connected to the second rolling wheel, a gap is left between the end of the blocking plate and the discharge port, and the second rolling wheel is in rolling contact with the inner wall of the guide groove on one side close to the first annular guide rail, and a gap is left with the inner wall on the other side; The two sides of the electrode paste unloading trolley are rotatably connected with upper spring locks, the sides of the two retaining edges are rotatably connected with lower spring locks, and the upper spring lock and the lower spring lock on the same side are fixedly connected with the same tension spring.

[0012] Furthermore, the electrode paste unloading trolley is provided with a material guiding part, which is inclined, and the lower end of which is connected to the material discharging port; The discharge port is located above the pre-flow table.

[0013] Furthermore, a second driving motor is provided on the top of the electrode paste unloading trolley, a rotating shaft is provided above the discharge port, the rotating shaft is rotatably connected to the electrode paste unloading trolley, and the rotating shaft of the second driving motor is transmission-connected to the rotating shaft through a transmission belt; A plurality of stirring rods are arranged on the rotating shaft.

[0014] Furthermore, one side of the electrode paste unloading trolley is fixedly connected to the side support shaft through a connecting rod.

[0015] Furthermore, a second annular guide rail is provided on both sides of the silo, an electric ore trolley is installed on the second annular guide rail, and a discharge port of the electric ore trolley is located directly above the silo; The discharge port of the furnace top feeding belt conveyor is located above the electric ore trolley and is used for fixed-point feeding of the electric ore trolley.

[0016] (III) Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the electrode paste distribution trolley can be driven to make circular motion with the side support shaft as the axis through the shaft-type driving structure, and the distance between the second rolling wheel and the discharge port can be changed through the protrusions provided. With the cooperation of the guide groove and the protrusions, the blocking structure dynamically blocks the discharge port, so that the electrode paste distribution trolley does not need to be frequently started and stopped, and can be distributed to multiple electrode shells in turn, thereby reducing energy consumption.

[0017] 2. In the present invention, when the second rolling wheel contacts the protrusion, the discharge port is located directly above one of the arc surfaces and starts to discharge; when the second rolling wheel stops contacting the protrusion, the discharge port is located directly above the discharge pipe connected to the arc surface and stops discharging; the pre-flow table and the protrusion are set so that the discharge port can flow the electrode paste through the arc surface into the discharge pipe in advance, thereby increasing the discharge time and discharge amount of the electrode paste.

[0018] 3. In the present invention, AC power is converted into DC power after passing through a rectifier cabinet, and the DC power is sent to the electrode column through a short-circuit network system, so that the electrode column generates a DC arc. Compared with AC power, DC power has no frequency change, which can improve the power factor and reduce the waste of electric energy. At the same time, the generated DC arc is stable and the heat energy is relatively concentrated, so that the furnace wall temperature of the submerged arc furnace is relatively low, thereby saving the use of circulating cooling water and extending the service life of the submerged arc furnace.

[0019] Fourth, in the present invention, the rotating shaft of the second driving motor drives the rotating shaft and the stirring rod arranged on the rotating shaft to rotate through the transmission belt to prevent the electrode paste from blocking the discharge port during discharge.

[0020] 5. In the present invention, the contact area with the limiting rolling groove can be reduced by setting the first rolling wheel, so as to facilitate the first rolling wheel to turn. The first rolling wheel can be limited by the setting limiting rolling groove to prevent the support seat from tilting during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structural distribution diagram of the ore-generating furnace, rectifier cabinet, electrode shell pushing device, furnace top trolley unloading system, side support shaft, furnace top feeding belt conveyor, silo, electrode column, raw smoke chimney, clean smoke chimney and electric ore trolley in the present invention; Figure 2 It is a schematic diagram of the ore-fired furnace, the electrode shell pushing device and the electrode column in the present invention; Figure 3 It is a schematic diagram of the guide docking base, the first annular guide rail and the guide platform in the present invention; Figure 4 A bottom view of the first annular guide rail of the present invention; Figure 5 for Figure 4 A local enlarged schematic diagram of the middle A; Figure 6 A schematic diagram of the guide groove, the convex block, the avoidance groove and the second rolling wheel in the present invention; Figure 7 It is a bottom view of the support seat, the electrode paste distribution trolley and the blocking structure in the present invention; Figure 8 This is a schematic diagram of the blocking plate in the present invention when it stops blocking the discharge port; Fig. 9 It is an exploded schematic diagram of the electrode paste feeding trolley, the upper spring lock head, the lower spring lock head, the tension spring and the blocking plate in the present invention; Fig.10 for Fig. 9 A partial enlarged schematic diagram of point B in the middle; Fig.11 It is a schematic diagram of the material guiding part in the present invention; Fig.12 for Fig.11 A partial enlarged schematic diagram of point C in the middle; Fig.13 This is an overall three-dimensional schematic diagram of a high-carbon ferrochrome direct current furnace provided in the fourth embodiment of the present invention.

[0022] In the figure: 1. Submerged arc furnace; 2. Rectifier cabinet; 3. Electrode shell pusher; 4. Side support shaft; 5. Furnace top feeding belt conveyor; 6. Material bin; 7. Electrode column; 701. Holder; 702. Electrode shell; 8. Raw flue gas chimney; 9. Clean flue gas chimney; 10. Short net system; 11. Diversion docking base; 12. First annular guide rail; 13. Guide platform; 14. Feeding pipe; 15. Pre-flow platform; 16. Electrode paste feeding trolley; 17. Discharge port; 18. Guide groove; 19. Inner gear ring; 20. Support seat; 21. Gear; 22. First drive Motor; 23. first rolling wheel; 24. limit rolling groove; 25. arc surface; 26. bump; 27. avoidance groove; 28. docking shaft; 29. ​​blocking plate; 30. pull rod; 31. stop edge; 32. anti-interference slide groove; 33. docking shaft head; 34. second rolling wheel; 35. upper spring lock; 36. lower spring lock; 37. tension spring; 38. material guide; 39. second driving motor; 40. rotating shaft; 41. transmission belt; 42. stirring rod; 43. connecting rod; 44. second annular guide rail; 45. electric ore trolley; 46. lifting ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1 like Figure 1-Figure 13 As shown, a high carbon ferrochrome direct current furnace comprises an ore-fired furnace 1, a rectifier cabinet 2, an electrode shell pushing device 3, a furnace top trolley unloading system, a side support shaft 4 and a furnace top feeding belt conveyor 5. The top of the ore-fired furnace 1 is connected with a silo 6, an electrode column 7, a raw flue gas chimney 8 and a clean flue gas chimney 9; In the present invention, after the installation of the ore-heating furnace 1, the rectifier cabinet 2, the electrode shell pushing device 3, the furnace top trolley unloading system, the side support shaft 4, the furnace top feeding belt conveyor 5, the silo 6, the electrode column 7, the raw smoke chimney 8 and the clean smoke chimney 9 is completed, the overall height is about 5 floors. Therefore, during construction, the ore-heating furnace 1, the rectifier cabinet 2, the electrode shell pushing device 3, the furnace top trolley unloading system, the side support shaft 4, the furnace top feeding belt conveyor 5, the silo 6, the electrode column 7, the raw smoke chimney 8 and the clean smoke chimney 9 are evenly distributed on each floor, and the present invention is limited and fixed by the ground of each floor. The clean smoke chimney 9 is set to ensure that the smoke in the furnace enters the purification equipment through the clean smoke chimney 9 for treatment. The raw smoke chimney 8 is in a normally closed state. When the furnace condition is abnormal Or when there is a power outage in the plant area, close the valve in the clean flue gas chimney 9 and open the valve in the rough flue gas chimney 8 to ensure that the flue gas in the furnace cannot enter the purification equipment through the clean flue gas chimney 9, but is safely released through the rough flue gas chimney 8. The electrode shell pushing device 3 is located at the top of the electrode column 7. The rectifier cabinet 2 is electrically connected to the electrode column 7 through the short network system 10. The alternating current is converted into direct current after passing through the rectifier cabinet 2. The direct current is sent to the electrode column 7 through the short network system 10, so that the electrode column 7 generates a direct current arc. Compared with alternating current, direct current has no frequency change, which can improve the power factor and reduce the waste of electric energy. At the same time, the generated direct current arc is stable, and the heat energy is relatively concentrated, so that the furnace wall temperature of the submerged arc furnace 1 is relatively low, thereby saving the use of circulating cooling water and extending the service life of the submerged arc furnace 1; Further, there are at least two groups of silos 6 and electrode columns 7, and the silos 6 and electrode columns 7 are distributed in a circular manner on the top of the submerged arc furnace 1. The electrode column 7 is divided into a holding cylinder 701 and an electrode shell 702. The holding cylinder 701 is connected to the submerged arc furnace 1, and the electrode shell 702 is slidably connected in the holding cylinder 701, and the bottom of the electrode shell 702 extends into the submerged arc furnace 1. The number of electrode shell pushing devices 3 corresponds to the number of electrode shells 702, and the electrode shell pushing devices 3 are sleeved on the corresponding electrode shells 702; The number of the feed pipes 14 corresponds one to one with the electrode shell pushing device 3, and the feed pipes 14 are detachably mounted on the electrode shell pushing device 3. The feed pipes 14 are connected to the electrode shell 702 through the electrode shell pushing device 3. The electrode shell pushing device 3 can support the diversion docking base 11 while aligning the electrode shell 702 with the corresponding feed pipe 14 to facilitate the delivery of electrode paste.

[0025] like Figure 3 As shown, the furnace top trolley unloading system includes a guide docking base 11, on which a first annular guide rail 12 and a guide platform 13 are provided. The bottom of the guide docking base 11 is connected to a unloading pipe 14, and the top is provided with a pre-flow platform 15 connected to the unloading pipe 14, and the pre-flow platform 15 is used to extend the unloading time; The first annular guide rail 12 is provided with an axial drive structure, the top of which is fixedly connected with an electrode paste unloading trolley 16, and the discharge port of the furnace top feeding belt conveyor 5 is located above the electrode paste unloading trolley 16. Figure 8 As shown, a discharge port 17 is provided at the bottom of the electrode paste feeding trolley 16, and a blocking structure is also provided at the bottom of the electrode paste feeding trolley 16; A guide groove 18 is provided on the guide platform 13, and the blocking structure is in rolling contact with one side of the guide groove 18; The side support shaft 4 is rotatably disposed on the ground and is located at the axis of the diversion docking base 11 , and is used to provide auxiliary support for the electrode paste unloading trolley 16 .

[0026] Further, such as Figure 4 As shown, the inner side wall of the first annular guide rail 12 is provided with an inner gear ring 19, and the shaft drive structure includes a support seat 20 and a gear 21. The support seat 20 is slidably connected to the top of the first annular guide rail 12, and a first drive motor 22 is installed on one side of the support seat 20. The rotating shaft of the first drive motor 22 passes through the support seat 20, and the free end is fixedly connected with the gear 21, and the gear 21 is meshed with the inner gear ring 19. The bottom two sides of the support seat 20 are rotatably connected with first rolling wheels 23. The inner wall and the outer wall of the first annular guide rail 12 are both provided with limiting rolling grooves 24. The first rolling wheel 23 is in rolling contact with the limiting rolling grooves 24. The first rolling wheel 23 can reduce the contact area with the limiting rolling grooves 24 to facilitate the first rolling wheel 23 to turn. The first rolling wheel 23 can be limited by the limiting rolling grooves 24 to prevent the support seat 20 from tilting during movement. The electrode paste unloading trolley 16 is fixedly connected to the top of the support seat 20 .

[0027] Specifically: during operation, the first drive motor 22 drives the gear 21 to rotate clockwise through the rotating shaft, and under the meshing action, the gear 21 makes a counterclockwise circular motion with the side support shaft 4 as the axis, thereby driving the support seat 20 and the electrode paste unloading trolley 16 on the top of the support seat 20 to move.

[0028] Further, such as Figure 3 and Figure 6 As shown, the pre-flow table 15 is provided with an inclined arc surface 25, and the lower end of the arc surface 25 is connected to the corresponding feed pipe 14; The guide groove 18 is located between the pre-flow platform 15 and the first annular guide rail 12. The groove surface of the guide groove 18 close to the pre-flow platform 15 is provided with a plurality of protrusions 26 corresponding to the pre-flow platform 15 one by one. A plurality of avoidance grooves 27 corresponding to the protrusions 26 are formed on the groove surface of the guide groove 18 away from the pre-flow platform 15 .

[0029] Further, such as Figure 7-10 As shown, the bottom of the electrode paste unloading trolley 16 is rotatably connected to a docking shaft 28, and the blocking structure includes a blocking plate 29 and a pull rod 30. The blocking plate 29 is located below the discharge port 17, and both sides of the blocking plate 29 are provided with a retaining edge 31, and one end of the two retaining edges 31 is rotatably connected to the docking shaft 28. The provided retaining edges 31 can prevent the electrode paste from leaking from both sides of the blocking plate 29; The bottom of the blocking plate 29 is provided with an anti-interference slide groove 32, and a docking shaft head 33 is slidably connected to the anti-interference slide groove 32. The bottom of the pull rod 30 is slidably connected to the top of the guide platform 13, and one end of the pull rod 30 is rotatably connected to the docking shaft head 33. The anti-interference slide groove 32 can prevent the docking shaft head 33 from interfering with the blocking plate 29 when the pull rod 30 pulls the blocking plate 29 through the docking shaft head 33. The other end of the pull rod 30 is rotatably connected to a second rolling wheel 34, and the second rolling wheel 34 is close to the first guide groove 18. The inner wall of one side of the annular guide rail 12 is in rolling contact and has a gap with the inner wall of the other side, so that the second rolling wheel 34 can roll smoothly in the first annular guide rail 12, and a gap is left between the end of the blocking plate 29 and the discharge port 17. When the blocking plate 29 is reset, the distance between the blocking plate 29 and the discharge port 17 will gradually decrease, and part of the electrode paste will be stuck in the gap between the blocking plate 29 and the discharge port 17, so as to avoid frequent forced contact between the blocking plate 29 and the discharge port 17 when the blocking plate 29 is reset, thereby accelerating the wear of the blocking plate 29 and the discharge port 17; Upper spring locks 35 are rotatably connected to both sides of the electrode paste discharge trolley 16, and lower spring locks 36 are rotatably connected to the sides of the two retaining edges 31. The upper spring locks 35 and lower spring locks 36 on the same side are fixedly connected to the same tension spring 37, wherein the upper spring lock 35 is rotatably connected to the electrode paste discharge trolley 16, and the lower spring lock 36 is rotatably connected to the retaining edge 31, to prevent the upper spring lock 35 and the lower spring lock 36 from interfering with each other when the blocking plate 29 is opened.

[0030] Further, such as Fig.11 As shown, the electrode paste unloading trolley 16 is provided with a material guide portion 38, the material guide portion 38 is inclined, and the lower end is connected to the discharge port 17; The discharge port 17 is located above the pre-flow platform 15 .

[0031] Specifically: during the movement of the electrode paste unloading trolley 16, the second rolling wheel 34 rolls along the groove surface of the guide groove 18 close to the pre-flow table 15. When the second rolling wheel 34 contacts the protrusion 26, the discharge port 17 is located directly above one of the arc surfaces 25. As the second rolling wheel 34 continues to roll, the distance between the second rolling wheel 34 and the discharge port 17 gradually increases. At this time, the second rolling wheel 34 pulls the docking shaft head 33 through the pull rod 30, and the docking shaft head 33 pulls the blocking plate 29, so that the blocking plate 29 rotates counterclockwise with the docking shaft 28 as the rotation center, thereby stopping the blocking of the discharge port 17. At this time, the electrode paste in the electrode paste unloading trolley 16 is discharged onto the arc surface 25 through the discharge port 17, and slides into the unloading tube 14, thereby replenishing the electrode paste for the electrode column 7; When the blocking plate 29 rotates counterclockwise, the two tension springs 37 will be stretched. As the second rolling wheel 34 rolls, the second rolling wheel 34 will move away from the protrusion 26 and re-contact the groove surface of the guide groove 18 close to the pre-flow table 15. During this process, the distance between the second rolling wheel 34 and the discharge port 17 will gradually decrease. At this time, the second rolling wheel 34 will push the docking shaft head 33 through the pull rod 30, and the docking shaft head 33 will push the blocking plate 29, so that the blocking plate 29 is reset to block the discharge port 17. At the same time, the two tension springs 37 in the stretched state will shrink and reset, and assist in driving the blocking plate 29 to reset. When the second rolling wheel 34 stops contacting the protrusion 26 , the discharge port 17 is located right above the discharge pipe 14 connected to the arc surface 25 .

[0032] In the present invention, when the second rolling wheel 34 contacts the convex block 26, the discharge port 17 is located directly above one of the arc surfaces 25 and starts to discharge materials. When the second rolling wheel 34 stops contacting the convex block 26, the discharge port 17 is located directly above the discharge pipe 14 connected to the arc surface 25 and stops discharging materials. In the present invention, the pre-flow table 15 and the convex block 26 are provided so that the discharge port 17 can flow the electrode paste into the discharge pipe 14 through the arc surface 25 in advance, thereby increasing the discharge time and discharge amount of the electrode paste, so that the electrode paste discharge trolley 16 does not need to stop specifically above the electrode shell 702 to discharge the material, and the first drive motor 22 does not need to be frequently started and stopped, thereby reducing the instantaneous current value of the motor and reducing the waste of kinetic energy during braking; When it is necessary to further extend the discharge time and discharge amount of the electrode paste, it is only necessary to reduce the rotation speed of the first drive motor 22, thereby extending the rolling time of the second rolling wheel 34 on the protrusion 26, increasing the discharge time of the electrode paste, and increasing the discharge amount; conversely, increasing the rotation speed of the first drive motor 22, thereby shortening the rolling time of the second rolling wheel 34 on the protrusion 26, shortening the discharge time of the electrode paste, and reducing the discharge amount.

[0033] Further, such as Fig.11 and Fig.12 As shown, a second drive motor 39 is provided on the top of the electrode paste unloading trolley 16, and a rotating shaft 40 is provided above the discharge port 17. The rotating shaft 40 is rotatably connected to the electrode paste unloading trolley 16, and the rotating shaft of the second drive motor 39 is transmission-connected to the rotating shaft 40 through a transmission belt 41; A plurality of stirring rods 42 are provided on the rotating shaft 40 . During discharge, the rotating shaft of the second driving motor 39 drives the rotating shaft 40 and the stirring rods 42 provided on the rotating shaft 40 to rotate through the transmission belt 41 to prevent the electrode paste from blocking the discharge port 17 .

[0034] Furthermore, one side of the electrode paste unloading trolley 16 is fixedly connected to the side support shaft 4 through a connecting rod 43. The side support shaft 4 and the connecting rod 43 can provide auxiliary support for the electrode paste unloading trolley 16 to prevent the electrode paste unloading trolley 16 from tipping.

[0035] Embodiment 2 like Figure 1-Figure 13 As shown, this embodiment is improved on the basis of the first embodiment as follows: further, a plurality of lifting rings 46 are provided on the diversion docking base 11; During the long smelting process, the electrode shell 702 in the ore-heating furnace 1 will be calcined, resulting in insufficient electrode length, unstable arc, and the inability to accurately transport the electrode paste to the electrode sintering area in the furnace. At this time, the electrode shell 702 needs to be pushed downward by the electrode shell pushing device 3 to extend the electrode shell 702 outside the ore-heating furnace 1 into the ore-heating furnace 1. Specifically, the addition of electrode paste is stopped and the electrode shell pushing device 3 is separated from the flow-guiding docking base 11, and the lifting ring 46 is pulled up by the lifting device to lift the flow-guiding docking base 11. At this time, the feed pipe 14 is separated from the corresponding electrode shell pushing device 3, and then a new electrode shell 702 is welded on the top of the electrode shell 702 slidably plugged on the holding tube 701. After the welding is completed, the electrode shell 702 is pushed downward by the electrode shell pushing device 3, so that the electrode shell 702 is re-extended into the ore-heating furnace 1, ensuring that the electrode paste is accurately transported to the electrode sintering area in the furnace. As the electrode paste unloading trolley 16 moves, a small amount of electrode paste will leak out from the gap between the discharge port 17 and the blocking plate 29 and spill onto the diversion docking base 11. Before welding a new electrode shell 702, the staff only needs to clean up the electrode paste spilled on the diversion docking base 11 to keep the diversion docking base 11 clean.

[0036] Embodiment 3 This embodiment is improved on the basis of the first embodiment as follows: when the number of silos 6 is too large, a furnace top trolley unloading system provided by the present invention can be installed to unload the multiple silos 6. It is only necessary to connect the unloading pipe 14 with the corresponding silo 6. The electrode paste unloading trolley 16 in the furnace top trolley unloading system is used to load the ore, so as to unload the silo 6, further reducing the instantaneous current value of the motor and reducing the waste of kinetic energy during braking. The working principle of the furnace top trolley unloading system has been explained in the first embodiment, and the staff only needs to expand the size of the furnace top trolley unloading system, so it will not be repeated.

[0037] Embodiment 4 like Figure 1-Figure 13 As shown, this embodiment is improved on the basis of the first embodiment as follows: further, second annular guide rails 44 are provided on both sides of the silo 6, and an electric ore trolley 45 is installed on the second annular guide rails 44, and the discharge port of the electric ore trolley 45 is located directly above the silo 6; like Fig.13 As shown, if the number of silos 6 is small and the distance between two adjacent silos 6 is large, the traditional second annular guide rail 44 and the electric ore trolley 45 can also be used to unload the ore. The advantage is that it is easy to install and there is no need for the electric ore trolley 45 to start and stop frequently. A furnace top feeding belt conveyor 5 is installed on the ground, and the discharge port of the furnace top feeding belt conveyor 5 is above the electric ore trolley 45. The furnace top feeding belt conveyor 5 is set up to carry out fixed-point feeding for the electrode paste unloading trolley 16 and the electric ore trolley 45.

[0038] In summary, the workflow of the present invention is: During operation, the first drive motor 22 drives the gear 21 to rotate clockwise through the rotating shaft. Under the meshing action, the gear 21 makes a counterclockwise circular motion with the side support shaft 4 as the axis, thereby driving the support seat 20 and the electrode paste unloading trolley 16 on the top of the support seat 20 to move.

[0039] During the movement of the electrode paste discharge trolley 16, the second rolling wheel 34 rolls along the groove surface of the guide groove 18 close to the pre-flow table 15. When the second rolling wheel 34 contacts the protrusion 26, the discharge port 17 is located directly above one of the curved surfaces 25. As the second rolling wheel 34 continues to roll, the distance between the second rolling wheel 34 and the discharge port 17 will gradually increase. At this time, the second rolling wheel 34 will pull the docking shaft head 33 through the pull rod 30, and the docking shaft head 33 will pull the blocking plate 29, so that the blocking plate 29 rotates counterclockwise with the docking shaft 28 as the rotation center, thereby stopping the blockage of the discharge port 17. At this time, the electrode paste in the electrode paste discharge trolley 16 is discharged onto the curved surface 25 through the discharge port 17, and slides into the discharge pipe 14, thereby replenishing the electrode paste for the electrode column 7.

[0040] During discharge, the rotating shaft of the second driving motor 39 drives the rotating shaft 40 and the stirring rod 42 disposed on the rotating shaft 40 to rotate through the transmission belt 41 to prevent the electrode paste from blocking the discharge port 17 .

[0041] As the second rolling wheel 34 rolls, the second rolling wheel 34 will move away from the protrusion 26 and re-contact the groove surface of the guide groove 18 close to the pre-flow table 15. During this process, the distance between the second rolling wheel 34 and the discharge port 17 will gradually decrease. At this time, the second rolling wheel 34 will push the docking shaft head 33 through the pull rod 30, and the docking shaft head 33 will push the blocking plate 29 to reset the blocking plate 29 to block the discharge port 17. At the same time, the two tension springs 37 in the stretched state will shrink and reset, and assist in driving the blocking plate 29 to reset. When the second rolling wheel 34 stops contacting the protrusion 26 , the discharge port 17 is located directly above the discharge pipe 14 connected to the arc surface 25 and stops discharging, and the shaft drive structure drives the electrode paste discharge trolley 16 to continue to discharge to the next electrode column 7 .

[0042] When the furnace top trolley unloading system is used to unload the ore from the silo 6, the working principle of the furnace top trolley unloading system has been described in the first embodiment, so it will not be repeated here.

[0043] However, as is well known to those skilled in the art, the working principles and wiring methods of the rectifier cabinet 2, the electrode shell pushing device 3, the short-circuit system 10, the first drive motor 22, the second drive motor 39, the electric ore trolley 45 and the furnace top feeding belt conveyor 5 are commonplace and are all conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0044] The above different embodiments can be combined, replaced and used in conjunction with each other.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high carbon ferrochrome direct current furnace, characterized in that: The invention comprises an ore-heating furnace (1), a rectifier cabinet (2), an electrode shell pushing device (3), a furnace top trolley unloading system, a side support shaft (4) and a furnace top feeding belt conveyor (5); the top of the ore-heating furnace (1) is connected to a silo (6), an electrode column (7), a raw flue gas chimney (8) and a clean flue gas chimney (9); the electrode shell pushing device (3) is located on the top of the electrode column (7); and the rectifier cabinet (2) is electrically connected to the electrode column (7) via a short-circuit system (10); The furnace top trolley unloading system comprises a flow guiding docking base (11), a first annular guide rail (12) and a guide platform (13) are provided on the flow guiding docking base (11), a unloading pipe (14) is connected to the bottom of the flow guiding docking base (11), and a pre-flow platform (15) connected to the unloading pipe (14) is provided on the top, and the pre-flow platform (15) is used to extend the unloading time; The first annular guide rail (12) is provided with an axial drive structure, the top of the axial drive structure is fixedly connected to an electrode paste unloading trolley (16), the discharge port of the furnace top feeding belt conveyor (5) is located above the electrode paste unloading trolley (16), the bottom of the electrode paste unloading trolley (16) is provided with a discharge port (17), and the bottom of the electrode paste unloading trolley (16) is also provided with a blocking structure; The guide platform (13) is provided with a guide groove (18), and the blocking structure is in rolling contact with one side of the guide groove (18); The side support shaft (4) is rotatably arranged on the ground and is located at the axis of the diversion docking base (11), and is used to provide auxiliary support for the electrode paste unloading trolley (16).

2. The high carbon ferrochrome direct current furnace according to claim 1, characterized in that: The diversion docking base (11) is provided with a plurality of lifting rings (46); The electrode columns (7) include at least two groups, and the electrode columns (7) are distributed in a circular pattern on the top of the submerged arc furnace (1). The electrode columns (7) are divided into two parts: a holding tube (701) and an electrode shell (702). The holding tube (701) is connected to the submerged arc furnace (1), and the electrode shell (702) is slidably connected to the holding tube (701), and the bottom of the electrode shell (702) extends into the submerged arc furnace (1); The number of the electrode shell pushing devices (3) corresponds to the number of electrode shells (702), and the electrode shell pushing devices (3) are sleeved on the corresponding electrode shells (702); The number of the feed tubes (14) corresponds one-to-one to the electrode shell pushing device (3), and the feed tubes (14) are detachably mounted on the electrode shell pushing device (3), and the feed tubes (14) are connected to the electrode shell (702) via the electrode shell pushing device (3).

3. The high carbon ferrochrome direct current furnace according to claim 1, characterized in that: There are at least two groups of silos (6), and the silos (6) are distributed in a circular pattern on the top of the ore-fired furnace (1).

4. The high carbon ferrochrome direct current furnace according to any one of claims 1 to 3, characterized in that: The inner side wall of the first annular guide rail (12) is provided with an inner gear ring (19), the shaft-type driving structure comprises a support seat (20) and a gear (21), the support seat (20) is slidably connected to the top of the first annular guide rail (12), a first driving motor (22) is installed on one side of the support seat (20), a rotating shaft of the first driving motor (22) passes through the support seat (20), and a gear (21) is fixedly connected to the free end, the gear (21) is meshed with the inner gear ring (19), first rolling wheels (23) are rotatably connected to both sides of the bottom of the support seat (20), the inner wall and the outer wall of the first annular guide rail (12) are provided with limiting rolling grooves (24), and the first rolling wheel (23) is in rolling contact with the limiting rolling grooves (24); The electrode paste unloading trolley (16) is fixedly connected to the top of the support seat (20).

5. The high carbon ferrochrome direct current furnace according to claim 4, characterized in that: The pre-flow table (15) is provided with an inclined arc surface (25), and the lower end of the arc surface (25) is connected to the corresponding feed pipe (14); The guide groove (18) is located between the pre-flow platform (15) and the first annular guide rail (12), and a groove surface of the guide groove (18) close to the pre-flow platform (15) is provided with a plurality of protrusions (26) corresponding one to one with the pre-flow platform (15); A plurality of avoidance grooves (27) corresponding one to one with the protrusions (26) are formed on the groove surface of the guide groove (18) away from the pre-flow platform (15).

6. The high carbon ferrochrome direct current furnace according to claim 5, characterized in that: The bottom of the electrode paste unloading trolley (16) is rotatably connected to a docking shaft (28), and the blocking structure comprises a blocking plate (29) and a pull rod (30). The blocking plate (29) is located below the discharge port (17), and blocking edges (31) are provided on both sides of the blocking plate (29). One end of each of the two blocking edges (31) is rotatably connected to the docking shaft (28); The bottom of the blocking plate (29) is provided with an anti-interference slide groove (32), and a docking shaft head (33) is slidably connected to the anti-interference slide groove (32). The bottom of the pull rod (30) is slidably connected to the top of the guide platform (13), one end of the pull rod (30) is rotatably connected to the docking shaft head (33), and the other end of the pull rod (30) is rotatably connected to a second rolling wheel (34). A gap is left between the end of the blocking plate (29) and the discharge port (17), and the second rolling wheel (34) is in rolling contact with the inner wall of the guide groove (18) on one side close to the first annular guide rail (12), and a gap is left with the inner wall on the other side. The electrode paste unloading trolley (16) is rotatably connected to upper spring locks (35) on both sides, and lower spring locks (36) are rotatably connected to the sides of the two stop edges (31). The upper spring locks (35) and the lower spring locks (36) on the same side are fixedly connected to the same tension spring (37).

7. The high carbon ferrochrome direct current furnace according to claim 6, characterized in that: The electrode paste unloading trolley (16) is provided with a material guide portion (38), the material guide portion (38) is inclined, and the lower end thereof is connected to the material discharge port (17); The discharge port (17) is located above the pre-flow table (15).

8. The high carbon ferrochrome direct current furnace according to claim 7, characterized in that: A second drive motor (39) is provided on the top of the electrode paste unloading trolley (16), a rotating shaft (40) is provided above the discharge port (17), the rotating shaft (40) is rotatably connected to the electrode paste unloading trolley (16), and the rotating shaft of the second drive motor (39) is transmission-connected to the rotating shaft (40) via a transmission belt (41); A plurality of stirring rods (42) are provided on the rotating shaft (40).

9. The high carbon ferrochrome direct current furnace according to claim 1, characterized in that: One side of the electrode paste unloading trolley (16) is fixedly connected to the side support shaft (4) via a connecting rod (43).

10. The high carbon ferrochrome direct current furnace according to claim 2, characterized in that: Second annular guide rails (44) are provided on both sides of the silo (6), an electric ore trolley (45) is installed on the second annular guide rails (44), and a discharge port of the electric ore trolley (45) is located directly above the silo (6); The discharge port of the furnace top feeding belt conveyor (5) is located above the electric ore material trolley (45) and is used to feed the electric ore material trolley (45) at a fixed point.

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