Cathode carbon block phosphorus pig iron casting furnace and casting method

Abstract

The invention discloses a cathode carbon block phosphorus pig iron casting furnace and belongs to the technical field of casting furnaces, the cathode carbon block phosphorus pig iron casting furnace comprises a supporting plate and a furnace body connected to the supporting plate through a shaft, a casting opening used for casting operation is formed in the furnace body, a feeding opening is seamlessly welded to an opening in the upper end of the furnace body, and the feeding opening is connected with a hemispherical frame through a gravity type turnover mechanism; a transfer box used for transferring molten iron is arranged in the hemispherical frame, and two shaft protrusions which are in central symmetry about the axis of the hemispherical frame are arranged on the hemispherical frame. The semi-spherical frame can be driven to move downwards and rotate at the same time through the gravity of the transfer box, safety accidents caused by splashing of poured molten iron are avoided, the transfer box and the semi-spherical frame can be connected through the clamping mechanism, and the situation that after the transfer box and the semi-spherical frame rotate by a certain angle, the semi-spherical frame slides off from the semi-spherical frame due to the gravity of the transfer box is avoided. And in addition, through a damping buffer structure, the stability of the transfer box in the overturning process can be improved, and the possibility that molten iron splashes out is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of casting furnaces, and specifically to a cathode carbon block ferrophosphorus casting furnace and a casting method thereof. Background Art

[0002] In the production process of aluminum electrolytic cells, the effective connection between cathode carbon blocks and cathode steel bars is crucial, and the cathode carbon block ferrophosphorus casting furnace plays a core role in this process;

[0003] Currently, there are mainly three methods for assembling cathode carbon blocks: the carbon paste ramming assembly method, the ferrophosphorus casting method, and the bonding method. Among them, the carbon paste ramming assembly method uses carbon paste to fill the gaps on both sides of the steel bar and then uses pneumatic tools to ram and compact it; the ferrophosphorus casting method is to pour the melted ferrophosphorus into the gaps and make the two combine into one after condensation; the bonding method is to use adhesives or carbon glue to bond the cathode carbon block and the steel bar together;

[0004] During the use of the cathode carbon block ferrophosphorus casting furnace, there are still some technical problems, specifically as follows: the opening of the cathode carbon block ferrophosphorus casting furnace is relatively large. When the iron water tank for transporting molten iron is hoisted to its opening and the molten iron is poured, the molten iron is likely to splash out, which is likely to cause safety accidents. In order to avoid the splashing of molten iron, there is a method in the prior art of using a baffle to block the opening of the casting furnace. For example, a molten iron casting furnace disclosed in the publication number CN219335960U uses an arc-shaped baffle to block the opening of the casting furnace. Although this method can avoid the splashing of molten iron, it requires driving by a motor and a cylinder, which increases the manufacturing cost;

[0005] In addition, when pouring molten iron, the amplitude is relatively large and not stable enough. Although the molten iron will not splash out of the casting furnace, it is likely to splash onto the parts of the motor or cylinder inside the casting furnace, which is likely to cause malfunctions in the stable operation of the motor or cylinder;

[0006] Therefore, a cathode carbon block ferrophosphorus casting furnace is needed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a cathode carbon block ferrophosphorus casting furnace and a casting method thereof to solve the problems in the above background art that the cost of blocking the splashing of molten iron by the existing cathode carbon block ferrophosphorus casting furnace is relatively high and it is not conducive to reducing the amplitude of pouring molten iron.

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

[0009] A phosphorus cast iron pouring furnace for cathode carbon blocks, comprising a support plate and a furnace body axially connected thereto. A pouring port for pouring operations is provided on the furnace body, and a feeding port is seamlessly welded at the upper opening of the furnace body. The feeding port is connected to a hemispherical frame through a gravity-type flipping mechanism, and a transfer box for transporting molten iron is placed inside the hemispherical frame. Two shaft protrusions that are centrosymmetric about the axis of the hemispherical frame are provided on the hemispherical frame, and a clamping mechanism for limiting the transfer box is connected to the hemispherical frame. The clamping mechanism includes an embedded groove provided on the transfer box.

[0010] Preferably, the diameter of the hemispherical frame matches the inner diameter of the feeding port, and the arc-shaped lower end of the hemispherical frame is a hollow structure. A square groove is provided at the upper end of the hemispherical frame, and the width of the square groove matches the width of the transfer box, and the length of the square groove is greater than the length of the transfer box.

[0011] Preferably, a rope groove is provided on the hemispherical frame, and a Y-shaped rope is connected to the transfer box. The diameter of the upper end of the Y-shaped rope matches the diameter of the rope groove, facilitating the upper end of the Y-shaped rope to be embedded inside the rope groove and preventing the rope from affecting the flipping of the hemispherical frame.

[0012] Preferably, the gravity-type flipping mechanism further includes two strip-shaped grooves penetrating through the inner and outer sides of the feeding port, and the two shaft protrusions respectively extend into the corresponding strip-shaped grooves. A follower gear is key-connected to the outside of each shaft protrusion, and teeth are evenly distributed on one side of each strip-shaped groove, and the follower gear is meshed with the teeth in the corresponding strip-shaped groove.

[0013] Preferably, a through rod that movably penetrates into the square groove inside the hemispherical frame is provided on each follower gear, and a limiting block is connected to the end of the through rod extending out of the corresponding follower gear through a bearing. Each limiting block is slidably connected to the corresponding limiting groove, and the limiting groove is provided on the inner side of the mounting frame. The mounting frame is fixedly installed on the outside of the feeding port, and the two mounting frames are centrosymmetric about the axis of the feeding port.

[0014] Preferably, the lower end of a piston rod is connected to the outside of the end of the through rod extending out of the corresponding follower gear through a bearing. A sliding groove is provided on the inner side of the upper end of the mounting frame, and a slider is slidably connected to the sliding groove. A piston tube is provided in each mounting frame, and the slider is provided at the upper end of each piston tube. The upper end of the piston rod is slidably connected to the inside of the piston tube seamlessly, and the middle part of the piston rod seals and movably penetrates through the lower end of the piston tube. A damping hole is provided at the upper end of the piston rod.

[0015] Preferably, a circular disc coaxial with the piston rod is fixedly provided at the lower end of the piston rod, and the upper surface of the disc coincides with the projection of the lower end of the piston tube. A spring that is movably nested on the outside of the middle part of the corresponding piston rod is provided between the upper surface of the disc and the lower end of the piston tube. The piston tube is filled with hydraulic oil.

[0016] Preferably, the engaging mechanism further includes an embedding strip connected to one end of the through rod extending into the square groove above the hemispherical frame. The embedding strips are arranged in one-to-one correspondence with the inner embedding grooves, and the minimum longitudinal thickness of the embedding strip fits the inner width of the inner embedding groove.

[0017] Preferably, both the limiting block and the limiting groove are wedge-shaped, so as to achieve the purpose of gradually squeezing the through rod when the limiting block moves downward relative to the limiting groove. The through rod is prism-shaped, and a prism-shaped through hole is formed in the follower gear, and the prism-shaped through hole facilitates the prism-shaped through rod to penetrate the follower gear. The longitudinal cross-sectional dimensions of the prism-shaped through hole and the prism-shaped through rod match, which is used to limit the through rod and make it rotate synchronously with the follower gear.

[0018] A casting method for a casting furnace, the method comprising:

[0019] Step 1: Use a Y-shaped rope to hoist the transfer box into the square groove on the hemispherical frame. During this process, the transfer box blocks the hollow structure on the hemispherical frame;

[0020] Step 2: Gradually release the Y-shaped rope so that the gravity of the transfer box gradually acts on the hemispherical frame. The hemispherical frame is subjected to the gravity of the transfer box and gradually moves downward;

[0021] Step 3: During the downward movement of the hemispherical frame, through the limitation of the limiting block, the limiting groove and the through rod, the shaft convex moves vertically downward stably relative to the teeth in the strip groove. At this time, the follower gear will rotate due to meshing with the teeth;

[0022] When the follower gear rotates, the hemispherical frame is driven to rotate synchronously through the shaft convex, and then the transfer box is gradually flipped. During the flipping process of the transfer box, the molten iron is gradually poured out. During the rotation process of the hemispherical frame, the connection degree between the furnace body and the outside through the feeding port can be reduced, thereby avoiding the splashing of molten iron and causing safety accidents;

[0023] Step 4: During the process of Step 3, the limiting block moves vertically downward relative to the limiting groove, so that the through rod drives the embedding strip to gradually approach the inner embedding groove, thereby clamping the transfer box and preventing the transfer box from detaching from the hemispherical frame during the flipping process;

[0024] And during the synchronous flipping process of the hemispherical frame and the transfer box, the rope groove can be stuck into the Y-shaped rope connecting the transfer box to prevent the rope from hindering the rotation of the hemispherical frame;

[0025] In addition, during the process of the hemispherical frame moving downward and rotating, the piston rod is driven to move downward synchronously through the through rod. The piston rod, the piston tube and the damping hole form a damping buffer structure, which can further delay the downward movement speed of the hemispherical frame, ensure the stable downward movement of the transfer box, and then facilitate the stable flipping of the transfer box, thereby further reducing the possibility of molten iron splashing and ensuring the safety of the staff.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: The phosphorus cast iron pouring furnace for cathode carbon blocks can drive the hemispherical frame to move downward and rotate simultaneously due to the gravity of the transfer box, preventing the splashing of the poured molten iron and avoiding safety accidents. Moreover, the transfer box and the hemispherical frame can be connected through a clamping mechanism, preventing the transfer box from slipping off the hemispherical frame due to its own gravity after rotating a certain angle. Additionally, a damping buffer structure can improve the stability during the flipping process of the transfer box, further reducing the possibility of molten iron splashing out.

[0027] 1. After placing the transfer box carrying molten iron into the square groove on the hemispherical frame, the gravity of the transfer box causes the hemispherical frame to move downward. During the downward movement of the hemispherical frame, due to the meshing of the follower gear and the teeth, the hemispherical frame can rotate. When the hemispherical frame rotates, it blocks the feeding port, thus preventing the molten iron from splashing out and helping to avoid safety accidents.

[0028] 2. During the flipping process of the hemispherical frame, as the wedge-shaped limiting block slides on the wedge-shaped limiting groove, the through rod can move into the square groove inside the hemispherical frame, thereby driving the embedding strip to snap into the embedded groove, preventing the transfer box from sliding off the hemispherical frame under its own gravity after the hemispherical frame and the transfer box have flipped 90°.

[0029] 3. During the flipping process of the hemispherical frame, a damping buffer structure composed of a piston tube, a piston rod, damping holes, and hydraulic oil can slow down the downward movement speed of the hemispherical frame, thereby improving the stability of the hemispherical frame driving the transfer box to flip, ensuring the stable pouring of molten iron, avoiding the problem of high splashing height of molten iron caused by large-scale pouring, and helping to further reduce the possibility of molten iron splashing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the front view structural schematic diagram of the present invention;

[0031] Figure 2 is the sectional view structural schematic diagram of the present invention;

[0032] Figure 3 is of the present invention Figure 2 the enlarged structural schematic diagram of point A;

[0033] Figure 4 is the partial sectional view structural schematic diagram of the present invention;

[0034] Figure 5 is of the present invention Figure 4 the enlarged structural schematic diagram of point B;

[0035] Figure 6 is the connection structural schematic diagram of the hemispherical frame and the follower gear of the present invention;

[0036] Figure 7 Schematic diagram of the connection structure between the limit block and the transfer box of the present invention;

[0037] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of point C in the present invention.

[0038] In the figure: 1, support plate; 2, furnace body; 3, casting port; 4, feeding port; 5, hemispherical frame; 6, transfer box; 7, installation frame; 8, shaft convex; 9, follower gear; 10, through rod; 11, limit block; 12, limit groove; 13, piston rod; 14, piston tube; 15, damping hole; 16, spring; 17, slider; 18, chute; 19, strip groove; 20, tooth; 21, rope groove; 22, embedding strip; 23, embedded groove. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1-8 , the present invention provides the following technical solutions:

[0041] Embodiment 1: To solve the problem that molten iron is likely to splash during the process of pouring molten iron into the phosphorus cast iron pouring furnace of the cathode carbon block in the past, resulting in safety accidents, the following technical solutions are provided. Specifically, a phosphorus cast iron pouring furnace for cathode carbon blocks includes a support plate 1 and a furnace body 2 axially connected thereto. A casting port 3 for casting operations is provided on the furnace body 2, and a feeding port 4 is seamlessly welded at the upper opening of the furnace body 2. The feeding port 4 is connected to a hemispherical frame 5 through a gravity-type flipping mechanism, and a transfer box 6 for transporting molten iron is arranged in the hemispherical frame 5. Two shaft convexes 8 that are centrosymmetric about the axis of the hemispherical frame 5 are provided on the hemispherical frame 5.

[0042] The diameter of the hemispherical frame 5 matches the inner diameter of the feeding port 4, and the arc-shaped lower end of the hemispherical frame 5 is a hollow structure. A square groove is provided at the upper end of the hemispherical frame 5, and the width of the square groove matches the width of the transfer box 6, and the length of the square groove is greater than the length of the transfer box 6. A rope groove 21 is provided on the hemispherical frame 5, and a Y-shaped rope is connected to the transfer box 6. The diameter of the upper end of the Y-shaped rope matches the diameter of the rope groove 21, facilitating the upper end of the Y-shaped rope to be embedded inside the rope groove 21 and avoiding the rope from affecting the flipping of the hemispherical frame 5.

[0043] The gravity flipping mechanism further includes two strip-shaped grooves 19 penetrating through the inner and outer sides of the feeding port 4, and two shaft protrusions 8 respectively extend into the corresponding strip-shaped grooves 19. A follower gear 9 is key-connected to the outside of each shaft protrusion 8. Tooth teeth 20 are evenly distributed at one side in each strip-shaped groove 19, and the follower gear 9 is meshed with the tooth teeth 20 in the corresponding strip-shaped groove 19. A through rod 10 that movably penetrates through the square groove in the hemispherical frame 5 is arranged on each follower gear 9, and a limiting block 11 is connected to the end of the through rod 10 extending out of the corresponding follower gear 9 by means of a bearing. Each limiting block 11 is slidably connected to the corresponding limiting groove 12, and the limiting groove 12 is arranged on the inner side of the mounting frame 7. The mounting frame 7 is fixedly installed on the outside of the feeding port 4, and the two mounting frames 7 are centrosymmetric about the axis center of the feeding port 4. The lower end of a piston rod 13 is connected to the outside of one end of the through rod 10 extending out of the corresponding follower gear 9 by means of a bearing. A sliding groove 18 is arranged on the inner side of the upper end of the mounting frame 7, and a sliding block 17 is slidably connected in the sliding groove 18. A piston tube 14 is arranged in each mounting frame 7, and the sliding block 17 is arranged at the upper end of each piston tube 14. The upper end of the piston rod 13 is slidably connected to the inside of the piston tube 14 seamlessly, and the middle part of the piston rod 13 movably penetrates through the lower end of the piston tube 14 in a sealed manner. A damping hole 15 is arranged at the upper end of the piston rod 13. During use, the transfer box 6 is hoisted to the square groove on the hemispherical frame 5, and then the Y-shaped rope is slowly released, so that the gravity of the transfer box 6 is gradually transmitted to the hemispherical frame 5. During this process, the hemispherical frame 5 will move downward due to gravity. During its downward movement, since the limiting block 11 connected to the through rod 10 by means of a bearing will slide on the limiting groove 12, and the diameter of the hemispherical frame 5 matches the inner diameter of the feeding port 4, it can be ensured that the shaft protrusion 8 arranged on the hemispherical frame 5 can move vertically downward relative to the strip-shaped groove 19. Furthermore, the follower gear 9 rotates under the action of the tooth teeth 20. Finally, the follower gear 9 drives the hemispherical frame 5 to rotate through the shaft protrusion 8, achieving the purpose of the hemispherical frame 5 moving downward and rotating at the same time. When the hemispherical frame 5 rotates, the connectivity between the furnace body 2 and the outside through the feeding port 4 can be greatly reduced, and further, the possibility of molten iron splashing to the outside can be greatly reduced, thereby preventing the occurrence of safety accidents.

[0044] A circular disc coaxial with the piston rod 13 is fixedly arranged at the lower end of the piston rod 13, and the upper surface of the disc coincides with the projection of the lower end of the piston tube 14. A spring 16 that is movably nested on the outside of the middle part of the corresponding piston rod 13 is arranged between the upper surface of the disc and the lower end of the piston tube 14. The piston tube 14 is filled with hydraulic oil. During use, the damping buffer structure composed of the piston rod 13, the piston tube 14, the hydraulic oil and the damping hole 15 can improve the smoothness of the downward movement of the transfer box 6 and the hemispherical frame 5, thereby further reducing the possibility of molten iron splashing.

[0045] Embodiment 2: To solve the problem that when using a baffle to prevent molten iron from splashing in the previous phosphorus cast iron pouring furnace for cathode carbon blocks, additional equipment was required to clamp and fix the iron water tank, the following technical solution is provided. Specifically, a clamping mechanism for limiting the transfer box 6 is connected to the hemispherical frame 5. The clamping mechanism includes an embedded groove 23 provided on the transfer box 6.

[0046] The clamping mechanism further includes an embedding strip 22 connected to one end of the through rod 10 extending into the square groove above the hemispherical frame 5. The embedding strips 22 are arranged in one-to-one correspondence with the embedded grooves 23. The minimum longitudinal thickness of the embedding strip 22 matches the inner width of the embedded groove 23. Both the limiting block 11 and the limiting groove 12 are wedge-shaped, so as to achieve the purpose of gradually squeezing the through rod 10 when the limiting block 11 moves downward relative to the limiting groove 12. The through rod 10 is prismatic. A prismatic through hole is provided on the follower gear 9, and the prismatic through hole facilitates the prismatic through rod 10 to pass through the follower gear 9. The longitudinal cross-sectional dimensions of the prismatic through hole and the prismatic through rod 10 match, which is used to limit the through rod 10 and make it rotate synchronously with the follower gear 9. During use, since the transfer box 6 and the hemispherical frame 5 rotate while moving downward, the embedding strip 22 can be driven to rotate synchronously through the prismatic through hole and the prismatic through rod 10, and the wedge-shaped limiting block 11 and the wedge-shaped limiting groove 12 can be used to make the through rod 10 drive the embedding strip 22 to engage with the embedded groove 23 before the transfer box 6 and the hemispherical frame 5 move relative to each other, so as to avoid the transfer box 6 sliding out of the hemispherical frame 5 under the action of gravity after the transfer box 6 and the hemispherical frame 5 are turned by a certain angle. In the above process, there is no need to use other equipment (such as a clamping structure driven by a cylinder) to fix the transfer box 6, which can reduce costs, and has a simple structure and is convenient for maintenance.

[0047] A pouring method for a pouring furnace, the method includes:

[0048] Step 1: Lift the transfer box 6 to the square groove on the hemispherical frame 5 through a Y-shaped rope. During this process, the transfer box 6 blocks the hollow structure on the hemispherical frame 5.

[0049] Step 2: Gradually release the Y-shaped rope, so that the gravity of the transfer box 6 gradually acts on the hemispherical frame 5, and the hemispherical frame 5 moves downward gradually under the gravity of the transfer box 6.

[0050] Step 3: During the downward movement of the hemispherical frame 5, through the limitation of the limiting block 11, the limiting groove 12 and the through rod 10, the shaft convex 8 stably moves vertically downward relative to the teeth 20 in the strip-shaped groove 19. At this time, the follower gear 9 will rotate due to meshing with the teeth 20.

[0051] When the follower gear 9 rotates, it drives the hemispherical frame 5 to rotate synchronously through the shaft convex 8, and then gradually flips the transfer box 6. During the flipping process of the transfer box 6, the molten iron is gradually poured out. During the rotation of the hemispherical frame 5, the connection degree between the furnace body 2 and the outside through the feeding port 4 can be reduced, thereby avoiding the splashing of molten iron and causing safety accidents;

[0052] Step 4: During the process of step 3, the limiting block 11 vertically moves downward relative to the limiting groove 12, so that the penetrating rod 10 drives the embedding strip 22 to gradually approach the embedded groove 23, thereby clamping the transfer box 6 and preventing the transfer box 6 from detaching from the hemispherical frame 5 during the flipping process;

[0053] Moreover, during the synchronous flipping process of the hemispherical frame 5 and the transfer box 6, the rope groove 21 can be clamped into the Y-shaped rope connecting the transfer box 6 to prevent the rope from hindering the rotation of the hemispherical frame 5;

[0054] In addition, during the process of the hemispherical frame 5 moving downward and rotating, the penetrating rod 10 drives the piston rod 13 to move downward synchronously. The piston rod 13, the piston tube 14 and the damping hole 15 constitute a damping buffer structure, which can further delay the downward movement speed of the hemispherical frame 5, ensure the stability of the downward movement of the transfer box 6, and then facilitate the stable flipping of the transfer box 6, thereby further reducing the possibility of molten iron splashing and ensuring the safety of the staff.

[0055] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0056] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cathode carbon block ferrophosphorus casting furnace, comprising a support plate (1) and a furnace body (2) axially connected thereto, characterized in that: A casting port (3) for casting operations is provided on the furnace body (2), and a feeding port (4) is seamlessly welded to the upper opening of the furnace body (2). The feeding port (4) is connected to a hemispherical frame (5) through a gravity-type flipping mechanism, and a transfer box (6) for transferring molten iron is arranged inside the hemispherical frame (5). Two shaft protrusions (8) that are centrosymmetric about the axis of the hemispherical frame (5) are provided on the hemispherical frame (5), and a clamping mechanism for limiting the transfer box (6) is connected to the hemispherical frame (5). The clamping mechanism includes an embedded groove (23) provided on the transfer box (6).

2. The phosphorus cast iron pouring furnace for cathode carbon blocks according to claim 1, characterized in that: The diameter of the hemispherical frame (5) matches the inner diameter of the feeding port (4), and the arc-shaped lower end of the hemispherical frame (5) is a hollow structure. A square groove is provided at the upper end of the hemispherical frame (5), and the width of the square groove matches the width of the transfer box (6), and the length of the square groove is greater than the length of the transfer box (6).

3. A kind of cathode carbon block ferrophosphorus casting furnace according to claim 2, characterized in that: A rope groove (21) is provided on the hemispherical frame (5), and a Y-shaped rope is connected to the transfer box (6). The diameter of the upper end of the Y-shaped rope matches the diameter of the rope groove (21), facilitating the upper end of the Y-shaped rope to be embedded inside the rope groove (21) and preventing the rope from affecting the flipping of the hemispherical frame (5).

4. A kind of cathode carbon block ferrophosphorus casting furnace according to claim 3, characterized in that: The gravity-type flipping mechanism further includes two strip-shaped grooves (19) penetrating through the inner and outer sides of the feeding port (4), and the two shaft protrusions (8) are respectively inserted into the corresponding strip-shaped grooves (19). A follower gear (9) is key-connected to the outside of each shaft protrusion (8). Teeth (20) are evenly distributed at one side inside each strip-shaped groove (19), and the follower gear (9) is meshed with the teeth (20) inside the corresponding strip-shaped groove (19).

5. A cathode carbon block ferrophosphorus casting furnace according to claim 4, characterized in that: A through rod (10) that movably penetrates through the square groove inside the hemispherical frame (5) is provided on each follower gear (9), and a limiting block (11) is connected to the end of the through rod (10) extending out of the corresponding follower gear (9) through a bearing. Each limiting block (11) is slidably connected to a corresponding limiting groove (12), and the limiting grooves (12) are arranged inside the mounting frame (7). The mounting frame (7) is fixedly installed on the outside of the feeding port (4), and the two mounting frames (7) are centrosymmetric about the axis of the feeding port (4).

6. The cathode carbon block ferrophosphorus casting furnace according to claim 5, characterized in that: The lower end of a piston rod (13) is connected to the outside of one end of the through rod (10) extending out of the corresponding follower gear (9) through a bearing. A sliding groove (18) is provided inside the upper end of the mounting frame (7), and a slider (17) is slidably connected to the sliding groove (18). A piston tube (14) is arranged inside each mounting frame (7), and the slider (17) is provided at the upper end of each piston tube (14). The upper end of the piston rod (13) is seamlessly slidably connected to the inside of the piston tube (14), and the middle of the piston rod (13) hermetically penetrates through the lower end of the piston tube (14). A damping hole (15) is provided at the upper end of the piston rod (13).

7. A kind of phosphorus cast iron pouring furnace for cathode carbon blocks according to claim 6, characterized in that: A circular disk coaxial with the lower end of the piston rod (13) is fixedly arranged, and the upper surface of the disk coincides with the projection of the lower end of the piston tube (14). A spring (16) movably nested outside the middle part of the corresponding piston rod (13) is arranged between the upper surface of the disk and the lower end of the piston tube (14). The piston tube (14) is filled with hydraulic oil.

8. A kind of phosphorus cast iron pouring furnace for cathode carbon blocks according to claim 7, characterized in that: The engaging mechanism further includes an embedding strip (22) connected to one end of the through rod (10) extending into the square groove above the hemispherical frame (5). The embedding strips (22) are arranged in one-to-one correspondence with the inner embedding grooves (23), and the minimum longitudinal thickness of the embedding strip (22) matches the inner width of the inner embedding groove (23).

9. A kind of cathode carbon block ferrophosphorus casting furnace according to claim 8, characterized in that: Both the limiting block (11) and the limiting groove (12) are wedge-shaped, so as to achieve the purpose of gradually squeezing the through rod (10) when the limiting block (11) moves downward relative to the limiting groove (12). The through rod (10) is prism-shaped. A prism-shaped through hole is formed in the follower gear (9), and the prism-shaped through hole facilitates the prism-shaped through rod (10) to penetrate the follower gear (9). The longitudinal cross-sectional dimensions of the prism-shaped through hole and the prism-shaped through rod (10) match to limit the through rod (10) to rotate synchronously with the follower gear (9).

10. A casting method for a casting furnace, characterized in that: The method includes: Step 1: Lift the transfer box (6) to the square groove on the hemispherical frame (5) through a Y-shaped rope. During this process, the transfer box (6) blocks the hollow structure on the hemispherical frame (5). Step 2: Gradually release the Y-shaped rope, so that the gravity of the transfer box (6) gradually acts on the hemispherical frame (5). The hemispherical frame (5) moves downward gradually under the gravity of the transfer box (6). During the downward movement of the hemispherical frame (5), through the limitation of the limiting block (11), the limiting groove (12) and the through rod (10), the shaft convex (8) stably moves vertically downward relative to the teeth (20) in the strip-shaped groove (19). At this time, the follower gear (9) will rotate due to meshing with the teeth (20). When the follower gear (9) rotates, it drives the hemispherical frame (5) to rotate synchronously through the shaft convex (8), and then gradually flips the transfer box (6). During the flipping process of the transfer box (6), the molten iron is gradually poured out. During the rotation process of the hemispherical frame (5), the connection degree between the furnace body (2) and the outside through the feeding port (4) can be reduced, thereby avoiding the splashing of molten iron and causing safety accidents. Step 4: During the process of Step 3, the limiting block (11) moves vertically downward relative to the limiting groove (12), so that the through rod (10) drives the embedding strip (22) to gradually approach the inner embedding groove (23), thereby clamping the transfer box (6) to prevent the transfer box (6) from detaching from the hemispherical frame (5) during the flipping process. Moreover, during the synchronous flipping process of the hemispherical frame (5) and the transfer box (6), the rope groove (21) can catch and connect the Y-shaped rope of the transfer box (6) to prevent the rope from hindering the rotation of the hemispherical frame (5). In addition, during the process of the hemispherical frame (5) moving downward and rotating, the piston rod (13) is driven to move downward synchronously through the through rod (10). The piston rod (13), piston tube (14) and damping hole (15) form a damping buffer structure, which can further delay the downward movement speed of the hemispherical frame (5), ensure the stability of the downward movement of the transfer box (6), and then facilitate the smooth flipping of the transfer box (6), thereby further reducing the possibility of molten iron splashing and ensuring the safety of the staff.

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