A high carbon ferrochrome direct current furnace

Abstract

The present invention belongs to the field of smelting technology, and in particular relates to a high-carbon ferrochrome DC furnace, comprising an ore-heating furnace, a rectifier cabinet, an electrode shell pushing device, a furnace top trolley unloading system, a side support shaft and a furnace top feeding belt conveyor. The top of the ore-heating furnace is connected to a silo, an electrode column, a raw flue gas chimney and a clean flue gas chimney. The electrode shell pushing device is located on the top of the electrode column. The rectifier cabinet is electrically connected to the electrode column through a short network system. The electrode paste distribution trolley can be driven to perform circular motion with the side support shaft as the axis through an arranged shaft-type drive structure. The distance between the second rolling wheel and the discharge port can be changed through the arranged protrusion. With the cooperation of the guide groove and the protrusion, 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 sequence, thereby reducing energy consumption.

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 power, 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, and at the same time, when feeding electrode paste or ore into the electrode shell or ore bin, the existing feeding device usually adopts A spiral conveyor rod or a sling is used to convey the electrode paste or mineral material to the electrode shell or mineral material bin, 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, multiple sets of electrode paste feeding devices need to be installed, 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 problems solved

[0004] The present invention provides a high carbon ferrochrome direct current furnace to solve the following problems.

[0005] 1. The existing feeding device has a single feeding method and cannot flexibly feed multiple electrode shells or mineral bins.

[0006] 2. When there are too many electrode shells or ore bins, the use of an electric feeding trolley for unloading requires the trolley to start and stop frequently, resulting in an increase in the instantaneous current value of the drive motor and further increase in energy consumption.

[0007] (2) Technical content

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A high-carbon ferrochrome DC furnace includes an ore-bearing furnace, a rectifier cabinet, an electrode shell pusher, a furnace top trolley unloading system, side support shafts, and a furnace top feeding belt conveyor. The top of the ore-bearing furnace is connected to a silo, an electrode column, a raw gas chimney, and a clean gas chimney. The electrode shell pusher is located on top of the electrode column, and the rectifier cabinet is electrically connected to the electrode column via a short circuit network system.

[0010] The furnace top trolley unloading system includes a guide docking base, on which a first annular guide rail and a guide platform are provided. The bottom of the guide docking base is connected to a discharge pipe, and the top is provided with a pre-flow platform connected to the discharge pipe. The pre-flow platform is used to extend the unloading time.

[0011] 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;

[0012] The guide table is provided with a guide groove, and the blocking structure is in rolling contact with one side of the guide groove;

[0013] The side support shaft is rotatably arranged on the ground and is located at the axis center of the diversion docking base, and is used for auxiliary support of the electrode paste unloading trolley.

[0014] Furthermore, a plurality of lifting rings are provided on the diversion docking base;

[0015] There are at least two groups of electrode columns, which are distributed circumferentially on the top of the submerged arc furnace. The electrode columns are divided into two parts: a holding tube and an electrode shell. The holding tube is connected to the submerged arc furnace, and the electrode shell is slidably connected to the holding tube, and the bottom of the electrode shell extends into the submerged arc furnace.

[0016] 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;

[0017] 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. The feed pipes are connected to the electrode shell through the electrode shell pushing device.

[0018] 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.

[0019] Furthermore, an inner gear ring is provided on the inner side wall of the first annular guide rail, and the shaft-type drive structure includes a support seat and a gear. The support seat is slidably connected to the top of the first annular guide rail, and a first drive motor is installed on one side of the support seat. The rotating shaft of the first drive motor passes through the support seat, and the free end is fixedly connected to a gear, and the gear is meshed with the inner gear ring. First rolling wheels are rotatably connected to both sides of the bottom of the support seat, and the inner wall and outer wall of the first annular guide rail are provided with limiting rolling grooves, and the first rolling wheel is in rolling contact with the limiting rolling grooves;

[0020] The electrode paste unloading trolley is fixedly connected to the top of the support seat.

[0021] 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 discharge pipe;

[0022] 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;

[0023] A plurality of avoidance grooves corresponding to the convex blocks are provided on the groove surface of the guide groove away from the pre-flow table.

[0024] 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 provided on both sides of the blocking plate. One end of the two blocking edges is rotatably connected to the docking shaft.

[0025] An anti-interference slide groove is provided at the bottom of the blocking plate, a docking 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 docking 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, 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;

[0026] The two sides of the electrode paste unloading trolley are rotatably connected with upper spring locks, and the sides of the two retaining edges are rotatably connected with lower spring locks. The upper and lower spring locks on the same side are fixedly connected with the same tension spring.

[0027] Furthermore, the electrode paste unloading trolley is provided with a material guide portion, which is inclined and the lower end of which is connected to the discharge port;

[0028] The discharge port is located above the pre-flow table.

[0029] Furthermore, a second drive 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 drive motor is connected to the rotating shaft through a transmission belt;

[0030] A plurality of stirring rods are arranged on the rotating shaft.

[0031] Furthermore, one side of the electrode paste unloading trolley is fixedly connected to the side support shaft through a connecting rod.

[0032] Furthermore, a second annular guide rail is provided on both sides of the silo, and an electric ore trolley is installed on the second annular guide rail, and the discharge port of the electric ore trolley is located directly above the silo;

[0033] 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.

[0034] (3) Beneficial effects

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. In the present invention, the electrode paste distributing trolley can be driven to perform circular motion with the side support shaft as the axis by the provided shaft drive structure, the distance between the second rolling wheel and the discharge port can be changed by the provided protrusion, and the blocking structure dynamically blocks the discharge port with the cooperation of the guide groove and the protrusion, so that the electrode paste distributing trolley does not need to be frequently started and stopped and can be distributed to multiple electrode shells in sequence, thereby reducing energy consumption.

[0037] 2. In the present invention, when the second rolling wheel contacts the bump, the discharge port is located directly above one of the arc surfaces and starts to discharge; when the second rolling wheel stops contacting the bump, the discharge port is located directly above the discharge pipe connected to the arc surface and stops discharging; by setting the pre-flow table and the bump, the discharge port can make the electrode paste flow into the discharge pipe through the arc surface in advance, thereby increasing the discharge time and discharge amount of the electrode paste.

[0038] 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 energy waste. 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.

[0039] 4. In the present invention, the rotating shaft of the second driving motor drives the rotating shaft and the stirring rod provided on the rotating shaft to rotate through the transmission belt, thereby preventing the electrode paste from clogging the discharge port during discharge.

[0040] 5. In the present invention, the first rolling wheel can reduce the contact area with the limiting rolling groove to facilitate the first rolling wheel to turn. The limiting rolling groove can limit the first rolling wheel to prevent the support seat from tilting during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a 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 flue gas chimney, clean flue gas chimney and electric ore trolley in the present invention;

[0042] Figure 2 Schematic diagram of the submerged arc furnace, electrode shell pushing device and electrode column in the present invention;

[0043] Figure 3 Schematic diagram of the guide docking base, the first annular guide rail and the guide platform in the present invention;

[0044] Figure 4A bottom view of the first annular guide rail of the present invention;

[0045] Figure 5 for Figure 4 A partial enlarged schematic diagram of point A in the middle;

[0046] Figure 6 A schematic diagram of the guide groove, the protrusion, the avoidance groove and the second rolling wheel in the present invention;

[0047] Figure 7 This is a bottom view of the support base, electrode paste distribution trolley and blocking structure in the present invention;

[0048] Figure 8 This is a schematic diagram of the blocking plate in the present invention when it stops blocking the discharge port;

[0049] Figure 9 Schematic diagram of the explosion of the electrode paste feeding trolley, upper spring lock, lower spring lock, tension spring and blocking plate in the present invention;

[0050] Figure 10 for Figure 9 A partial enlarged schematic diagram of point B in the middle;

[0051] Figure 11 Schematic diagram of the material guiding portion of the present invention;

[0052] Figure 12 for Figure 11 A partial enlarged schematic diagram of point C in the middle;

[0053] Figure 13 This is an overall three-dimensional schematic diagram of a high-carbon ferrochrome direct current furnace provided by the fourth embodiment of the present invention.

[0054] Figure: 1. Submerged arc furnace; 2. Rectifier cabinet; 3. Electrode shell pusher; 4. Side support shaft; 5. Furnace top feeding belt conveyor; 6. Material silo; 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. Discharge pipe; 15. Pre-flow platform; 16. Electrode paste discharge trolley; 17. Discharge port; 18. Guide trough; 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. Agitating rod; 43. Connecting rod; 44. Second annular guide rail; 45. Electric ore trolley; 46. Lifting ring. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0056] Example 1

[0057] like Figures 1-13 As shown, a high-carbon ferrochrome DC furnace includes a submerged arc 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 submerged arc 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.

[0058] 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 flue gas chimney 8 and the clean flue gas chimney 9 is completed, the overall height is about 5 stories. 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 flue gas chimney 8 and the clean flue gas chimney 9 are evenly distributed on each floor, and the present invention is limited and fixed by the ground of each floor. The clean flue gas chimney 9 is set to ensure that the flue gas in the furnace enters the purification equipment through the clean flue gas chimney 9 for treatment. The raw flue gas chimney 8 is in a normally closed state. When the furnace condition is abnormal, Or when there is a power outage in the plant, the valve in the clean flue gas chimney 9 is closed and the valve in the raw flue gas chimney 8 is opened 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 raw 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 energy waste. 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;

[0059] Furthermore, 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 pattern on the top of the submerged arc furnace 1. The electrode columns 7 are divided into two parts: 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 to the holding cylinder 701, and the bottom of the electrode shell 702 extends into the submerged arc furnace 1.

[0060] 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;

[0061] 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.

[0062] 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 discharge pipe 14, and the top is provided with a pre-flow platform 15 connected to the discharge pipe 14. The pre-flow platform 15 is used to extend the unloading time.

[0063] The first annular guide rail 12 is provided with an axial drive structure, the top of which 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. Figure 8 As shown, a discharge port 17 is provided at the bottom of the electrode paste unloading trolley 16, and a blocking structure is also provided at the bottom of the electrode paste unloading trolley 16;

[0064] 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;

[0065] The side support shaft 4 is rotatably arranged on the ground and is located at the axis of the diversion docking base 11 for auxiliary support of the electrode paste unloading trolley 16.

[0066] Further, such as Figure 4As 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 driving motor 22 is installed on one side of the support seat 20. The rotating shaft of the first driving motor 22 passes through the support seat 20, and the free end is fixedly connected to the gear 21, and the gear 21 is meshed with the inner gear ring 19. First rolling wheels 23 are rotatably connected on 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. The first rolling wheel 23 is in rolling contact with the limiting rolling grooves 24. The first rolling wheel 23 is provided to reduce the contact area with the limiting rolling grooves 24, so that the first rolling wheel 23 can turn. The limiting rolling grooves 24 can limit the first rolling wheel 23 to prevent the support seat 20 from tilting during movement.

[0067] The electrode paste unloading trolley 16 is fixedly connected to the top of the support base 20 .

[0068] Specifically: 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 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.

[0069] 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 discharge pipe 14;

[0070] 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.

[0071] 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 .

[0072] 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. Both sides of the blocking plate 29 are provided with a retaining edge 31. One end of each retaining edge 31 is rotatably connected to the docking shaft 28. The retaining edges 31 can prevent the electrode paste from leaking from both sides of the blocking plate 29.

[0073] 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 pull rod 30 from pulling the blocking plate 29 through the docking shaft head 33, and the docking shaft head 33 and the blocking plate 29 from interfering. 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 rolling wheel 34 in the guide groove 18. The inner wall of one side of the annular guide rail 12 is in rolling contact with the inner wall of the other side, leaving a gap, 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, avoiding frequent forced contact between the blocking plate 29 and the discharge port 17 when the blocking plate 29 is reset, which will accelerate the wear of the blocking plate 29 and the discharge port 17.

[0074] The electrode paste unloading trolley 16 is rotatably connected to both sides with upper spring locks 35, and the sides of the two baffles 31 are rotatably connected to lower spring locks 36. The upper spring locks 35 and the 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 unloading trolley 16, and the lower spring lock 36 is rotatably connected to the baffle 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.

[0075] Further, such as Figure 11 As shown, the electrode paste unloading trolley 16 is provided with a material guide portion 38, which is inclined and the lower end of which is connected to the discharge port 17;

[0076] The discharge port 17 is located above the pre-flow platform 15 .

[0077] 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 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 unloading trolley 16 is discharged onto the arc surface 25 through the discharge port 17 and slides into the discharge pipe 14, thereby replenishing the electrode paste for the electrode column 7;

[0078] 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 on the side 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 contract and reset, helping to drive the blocking plate 29 to reset.

[0079] When the second rolling wheel 34 stops contacting the protrusion 26 , the discharge port 17 is located directly above the discharge pipe 14 that is in communication with the arc surface 25 .

[0080] In the present invention, when the second rolling wheel 34 contacts the protrusion 26, the discharge port 17 is located directly above one of the arc surfaces 25 and begins to discharge. 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.

[0081] In the present invention, the provision of the pre-flow platform 15 and the protrusion 26 allows the discharge port 17 to 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. As a result, the electrode paste discharge trolley 16 does not need to stop specifically above the electrode shell 702 for discharge, 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.

[0082] 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 bump 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 bump 26, shortening the discharge time of the electrode paste, and reducing the discharge amount.

[0083] Further, such as Figure 11 and Figure 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 via a transmission belt 41;

[0084] The rotating shaft 40 is provided with a plurality of stirring rods 42 . During discharge, the rotating shaft of the second drive 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 clogging the discharge port 17 .

[0085] 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 to the electrode paste unloading trolley 16 to prevent the electrode paste unloading trolley 16 from tilting.

[0086] Example 2

[0087] like Figures 1-13 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;

[0088] During the long smelting process, the electrode shell 702 located in the submerged arc furnace 1 will be calcined, resulting in insufficient electrode length, arc instability, and the inability to accurately transport the electrode paste to the electrode sintering area in the furnace. At this time, it is necessary to push the electrode shell 702 downward through the electrode shell pushing device 3 to extend the electrode shell 702 outside the submerged arc furnace 1 into the submerged arc furnace 1, specifically: stop adding electrode paste and separate the electrode shell pushing device 3 from the diversion docking base 11, pull the lifting ring 46 upward through the sling, and then lift the diversion docking base 11, at this time, the discharge 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 inserted on the holding cylinder 701. After welding is completed, the electrode shell 702 is pushed downward by the electrode shell pushing device 3, so that the electrode shell 702 is extended back into the submerged arc furnace 1, ensuring that the electrode paste is accurately transported to the electrode sintering area in the furnace;

[0089] 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.

[0090] Example 3

[0091] This embodiment has made the following improvements on the basis of the first embodiment: when the number of silos 6 is too large, an additional furnace top trolley unloading system provided by the present invention can be installed to unload 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. The staff only needs to expand the size of the furnace top trolley unloading system, so it will not be repeated.

[0092] Example 4

[0093] like Figures 1-13 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;

[0094] like Figure 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 mineral trolley 45 can also be used to unload the ore. The advantage is that it is easy to install and the electric mineral trolley 45 does not need to be frequently started and stopped. A furnace top feeding belt conveyor 5 is installed on the ground. The discharge port of the furnace top feeding belt conveyor 5 is above the electric mineral 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 mineral trolley 45.

[0095] In summary, the workflow of the present invention is as follows:

[0096] 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 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.

[0097] 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 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 unloading trolley 16 is discharged onto the arc surface 25 through the discharge port 17, and slides into the unloading pipe 14, thereby replenishing the electrode paste for the electrode column 7.

[0098] During discharge, the rotating shaft of the second drive motor 39 drives the rotating shaft 40 and the stirring rod 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.

[0099] As the second rolling wheel 34 rolls, the second rolling wheel 34 moves away from the protrusion 26 and re-contacts the groove surface of the guide groove 18 on the side close to the pre-flow table 15. During this process, the distance between the second rolling wheel 34 and the discharge port 17 gradually decreases. At this time, the second rolling wheel 34 pushes the docking shaft head 33 through the pull rod 30, and the docking shaft head 33 pushes 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 contract and reset, helping to drive the blocking plate 29 to reset.

[0100] When the second rolling wheel 34 stops contacting the bump 26 , the discharge port 17 is located directly above the discharge pipe 14 connected to the arc surface 25 and stops discharging. The shaft drive structure drives the electrode paste discharge trolley 16 to continue discharging to the next electrode column 7 .

[0101] When the furnace top trolley unloading system is used to unload the ore from the hopper 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.

[0102] 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, so they will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0103] The above different embodiments can be combined, replaced and used in conjunction with each other.

[0104] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0105] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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); the rectifier cabinet (2) is electrically connected to the electrode column (7) through a short-circuit system (10); The furnace top trolley unloading system includes 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, an electrode paste unloading trolley (16) is fixedly connected to the top of the axial drive structure, a discharge port of the furnace top feeding belt conveyor (5) is located above the electrode paste unloading trolley (16), a discharge port (17) is provided at the bottom of the electrode paste unloading trolley (16), and a blocking structure is also provided at the bottom of the electrode paste unloading trolley (16); 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 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 discharge 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); The groove surface of the guide groove (18) away from the pre-flow platform (15) is provided with a plurality of avoidance grooves (27) corresponding one-to-one to the protrusions (26); 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). Both sides of the blocking plate (29) are provided with retaining edges (31), and one end of each retaining edge (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 the 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 the sides of the two retaining edges (31) are rotatably connected to lower spring locks (36), and the upper spring locks (35) and the lower spring locks (36) on the same side are fixedly connected to the same tension spring (37); 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. As the second rolling wheel (34) rolls, the second rolling wheel (34) moves away from the protrusion (26) and re-contacts 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) gradually decreases. 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); There are at least two groups of electrode columns (7), and the electrode columns (7) are distributed in a circular manner on the top of the submerged arc furnace (1). The electrode columns (7) are divided into two parts: a holding cylinder (701) and an electrode shell (702). The holding cylinder (701) is connected to the submerged arc furnace (1). 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 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 pipes (14) corresponds one-to-one to 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) 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 submerged arc 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), 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 to the gear (21), the gear (21) is meshed with the inner gear ring (19), and the bottom two sides of the support seat (20) are rotatably connected to the first rolling wheel (23), the inner wall and the outer wall of the first annular guide rail (12) are provided with a limiting rolling groove (24), and the first rolling wheel (23) is in rolling contact with the limiting rolling groove (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 1, 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 discharge port (17); The discharge port (17) is located above the pre-flow platform (15).

6. The high carbon ferrochrome direct current furnace according to claim 5, characterized in that: 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) via a transmission belt (41); A plurality of stirring rods (42) are provided on the rotating shaft (40).

7. 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).

8. 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), and an electric ore trolley (45) is installed on the second annular guide rails (44). The 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 trolley (45) and is used for fixed-point feeding of the electric ore trolley (45).

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