A roasting device for graphite electrode production

Abstract

The application discloses a roasting device for graphite electrode production and relates to the technical field of electrode production.The roasting device comprises a furnace body, a furnace cover is hinged to the front side of the furnace body, a cover is hinged to the front side of the furnace body, a discharging chamber is fixedly connected to the bottom inner surface of the furnace body, bearing side plates are fixedly connected to the top sides of the discharging chamber, a bearing arc plate is fixedly connected to the rear inner wall of the furnace body, and a rotating shaft is rotatably connected to the rear inner surface of the furnace body.The green body periphery is wrapped by the bearing side plates and the bearing arc plate, heat is rapidly dissipated, local overheating is avoided, and the heat dissipation is more uniform, so that the sintered and baked green body density is more consistent, the qualified rate is higher, the green body is clamped by the slide rod and the arc-shaped clamping plate, the green body is prevented from shaking during the sintering process, cracks, stratification or deformation are prevented, the structural integrity of the graphite electrode is ensured, and the qualified rate is further improved.

Description

Technical Field

[0001] This invention belongs to the field of electrode production, specifically relating to a calcination apparatus for producing graphite electrodes. Background Technology

[0002] Graphite electrodes are high-temperature resistant conductive materials, mainly made from petroleum coke and needle coke through roasting and graphitization. They have low resistivity and strong thermal shock resistance. In electric arc furnaces, they generate an electric arc through high-voltage current to melt scrap steel. They are used in steel production and the smelting of industrial silicon, yellow phosphorus, etc., and are key components in the electrochemical industry.

[0003] Patent CN222460238U discloses a calcination apparatus for producing graphite electrodes, including a calcination box and a filter plate slidably connected to the inner wall of the calcination box. The side wall of the calcination box has an upper sliding groove and a lower sliding groove. An upper sealing plate is slidably connected to the side wall of the calcination box through the upper sliding groove. A transparent plate is fixedly connected to the side wall of the upper sealing plate. A lower sealing plate is slidably connected to the side wall of the calcination box through the lower sliding groove. A limiting block is fixedly connected to the bottom wall of the lower sealing plate. A fixing bolt is threadedly connected to the inner wall of the limiting block. One end of the fixing bolt passing through the limiting block is also threadedly connected to the calcination box. Uniformly distributed turning rollers are rotatably connected to the inner wall of the calcination box. A cleaning component for cleaning the turning rollers is connected to the inner wall of the calcination box. The outer surface of the turning rollers can be cleaned while the turning rollers are rotating through the first cleaning ring and the second cleaning ring, which helps to improve the service life of the equipment and also increases the uniformity of heating of the graphite electrodes.

[0004] The above-mentioned device also has the following problems: if the graphite electrode green blank is not positioned during the sintering process, it is easy to cause cracks, delamination and deformation of the green blank. In the existing technology, the clamping device is fixed and only clamps a single part of the green blank, which can easily cause local shading and uneven heating, resulting in inconsistent density and a decrease in product qualification rate. Summary of the Invention

[0005] The purpose of this invention is to provide a calcination apparatus for the production of graphite electrodes, so as to solve the problems that if the graphite electrode green blank is not positioned during the sintering process, it is easy to cause cracks, delamination and deformation of the green blank. In the prior art, the clamping device is fixed and can only clamp a single part of the green blank, which can easily cause local shading and uneven heating, resulting in inconsistent density and reduced product qualification rate.

[0006] To achieve the above objectives, the present invention provides a calcination apparatus for producing graphite electrodes, comprising: The furnace body has a furnace cover hinged to its front side and a baffle hinged to its front side. A discharge chamber is fixedly connected to the inner bottom surface of the furnace body. Burning side plates are fixedly connected to both sides of the top of the discharge chamber. A burning arc plate is fixedly connected to the rear inner wall of the furnace body. A rotating shaft is rotatably connected to the inner rear surface of the furnace body. A quick unloading device is provided at the bottom of the furnace body and is used to quickly remove graphite electrode blanks from the furnace body. A heating regulating device is provided, which is located at the rear of the furnace body. The heating regulating device is used to promote the uniformity of heating during the sintering of hollow graphite electrodes.

[0007] According to another advantageous design of the invention, the furnace body comprises: The clamping rail is fixedly connected to the inner surface of the furnace body, and slide rails are fixedly connected to the upper and lower sides of the clamping rail. A sliding rod is slidably connected to the inner surface of a slide rail, and an arc-shaped clamp is fixedly connected to the end of the sliding rod away from the inner wall of the furnace.

[0008] According to another advantageous design of the invention, the furnace body further includes: A trapezoidal lifting block is fixedly connected to the side of the arc-shaped clamping plate near the clamping rail, and a locking block is fixedly connected to the inclined surface of the trapezoidal lifting block; A reciprocating lead screw, wherein the reciprocating lead screw is fixedly connected to the circumferential surface of the rotating shaft, and a limit ring is fixedly connected to the circumferential surface of the reciprocating lead screw; The movable seat is threadedly connected to the circumferential surface of the reciprocating lead screw, and a trapezoidal push block is fixedly connected to the side of the movable seat near the trapezoidal lifting block.

[0009] According to another advantageous design of the present invention, the rear end of the firing side plate is fixedly connected to the rear side of the inner wall of the furnace body, the top end of the firing side plate is fixedly connected to the lower surface of the clamping rail, the bottom end of the firing arc plate is fixedly connected to the upper surface of the clamping rail, a spring is provided between the end of the slide rod near the inner wall of the furnace body and the inner surface of the slide rail, the moving seat is slidably connected to the inner surface of the clamping rail, the trapezoidal pushing block is slidably connected to the side surface of the clamping rail, an inclined groove is provided on the inclined surface of the trapezoidal pushing block, and the inclined groove is slidably connected to the locking block, and the inclined surface of the trapezoidal lifting block abuts against the inclined surface of the trapezoidal pushing block.

[0010] According to another advantageous embodiment of the invention, the quick unloading device comprises: A pad is hinged to both sides of the inner wall of the unloading chamber, and a locking device is fixedly connected to the lower surface of the pad. An electric guide rail is fixedly connected to the inner surface of the bottom of the unloading chamber, and a telescopic bracket is fixedly connected to the moving end of the electric guide rail. A push plate is fixedly connected to the rear side of the telescopic card seat.

[0011] The grooves are formed on both sides of the inner wall of the unloading chamber.

[0012] According to another advantageous embodiment of the invention, the quick unloading device further includes: A sliding groove is formed on the inner side of the bottom of the clamping rail, and a pressure rod is slidably connected to the inner surface of the sliding groove; A through groove is provided on both sides of the top of the unloading chamber, and a support rod is hinged to the inner surface of the through groove; An adjusting seat is threadedly connected to the circumferential surface of the reciprocating lead screw.

[0013] According to another advantageous design of the invention, a torsion spring is provided at the hinge joint between the pad and the unloading chamber, the telescopic bracket is slidably connected to the bottom surface of the inner wall of the unloading chamber, the push plate is slidably connected to the bottom surface of the inner wall of the unloading chamber, the front side of the telescopic bracket abuts against the rear side of the cover, a torsion spring is provided at the hinge joint between the support rod and the through groove, and the top end of the pressure rod is fixedly connected to the lower surface of the adjusting seat.

[0014] According to another advantageous embodiment of the invention, the heating regulating device comprises: A partition is fixedly connected to the upper surface of a push plate, and a telescopic plate is slidably connected to the inner surface of the partition. The outer casing is fixedly connected to the rear side of the furnace body, and a heating rod is installed inside the outer casing; Heating rod two is located to the right of heating rod one.

[0015] According to another advantageous embodiment of the invention, the heating regulating device further includes: A sliding frame is slidably connected to the inner rear surface of the furnace body, and a connecting plate is fixedly connected to the rear end of the sliding frame; Telescopic rod one, which is fixedly connected to the rear side of the inner wall of the furnace; A fixing plate is fixedly connected to the inner surface of the front side of the sliding frame; Telescopic rod two is fixedly connected to the front side of the connecting plate, and a connecting shaft is fixedly connected to the free end of the front side of the telescopic rod two.

[0016] According to another advantageous design of the present invention, an electric pull rod is provided between the interior of the partition and the lower surface of the telescopic plate. The free end of the first telescopic rod slides through the rear side of the inner wall of the furnace and into the interior of the outer shell. A spring is provided inside the first telescopic rod and a spring is provided inside the second telescopic rod. The rear free end of the first telescopic rod is fixedly connected to the front side of the connecting plate. The connecting plate is slidably connected to the inner surface of the outer shell. The sliding frame is slidably connected to the inner surface of the outer shell. The rear end of the first heating rod is fixedly connected to the rear side of the connecting plate. The rear side of the fixed plate is fixedly connected to the front end of the first heating rod. The second heating rod is slidably connected to the inner surface of the fixed plate. The rear side of the connecting shaft abuts against the front side of the fixed plate. The rear side of the connecting shaft is fixedly connected to the front end of the second heating rod.

[0017] The beneficial effects of this invention are:

[0018] 1. The green blank is wrapped by the firing side plate and the firing arc plate, which allows heat to dissipate quickly, avoids local overheating, and is more uniform. This results in a more consistent density of the sintered blank and a higher pass rate. The green blank is clamped by the sliding rod and the arc-shaped clamping plate to prevent shaking during sintering, which can cause cracks, delamination or deformation. This ensures the integrity of the graphite electrode structure and further improves the pass rate. The rotating shaft drives the reciprocating screw and the limiting ring to rotate, which causes the moving seat to drive the trapezoidal pushing block to slide back and forth. With the help of the trapezoidal lifting block and the spring elastic reset, the arc-shaped clamping plate dynamically adjusts the clamping position to avoid uneven heating caused by local obstruction and further improves the uniformity of the green blank temperature and density.

[0019] 2. The green blank is supported by a pad plate. After sintering, the remote control lock opens and the pad plate rotates downward to let the cooked blank fall into the unloading chamber. The cooked blank is caught by the telescopic bracket. The electric guide rail drives the telescopic bracket and push plate to move forward and send the cooked blank out. There is no need to open the furnace cover, which avoids the temperature difference caused by the collision between the external air and the internal hot air and damages the graphite electrode. There is also no need to wait for cooling, which improves the processing efficiency. The support rod is rotated and extended under the pad plate by the torsion spring to increase the support force and promote sintering stability. During unloading, the reciprocating screw drives the adjusting seat and the pressure rod to push the support rod into the through slot. After the pad plate loses its support, it slowly opens under the gravity and torsion spring torque, so that the graphite electrode falls smoothly into the unloading chamber to complete the unloading.

[0020] 3. After unloading, the electric guide rail drives the telescopic bracket and push plate to move backward and retract into the unloading chamber. The push plate drives the partition and telescopic plate to move backward. The telescopic plate pushes the sliding frame to move backward and retract into the outer shell, making it easier to put in the green blank. When processing hollow green blanks, the electric pull rod pulls the telescopic plate to retract into the partition. The sliding frame stays in the furnace body. Heating rod one and heating rod two heat the inner wall of the hollow graphite electrode, so that the inside and outside are heated evenly and the sintering quality is improved. Before sintering, telescopic rod one and telescopic rod two drive the sliding frame, connecting plate and heating rod two to move forward, so that heating rod two moves in front of heating rod one to increase the heating distance, so as to achieve uniform sintering of solid or hollow green blanks and improve the applicability of the device. Attached Figure Description

[0021] Figure 1 This is a perspective view of the front side of the device of the present invention;

[0022] Figure 2 This is a three-dimensional half-sectional view of the front side of the furnace body of the present invention;

[0023] Figure 3 This is the invention Figure 2 Enlarged view of A in the middle;

[0024] Figure 4 This is a top view of the positioning mechanism of the present invention;

[0025] Figure 5 This is a three-dimensional half-sectional view of the front side of the quick unloading device of the present invention;

[0026] Figure 6 This is a three-dimensional half-sectional view of the side bottom surface of the quick unloading device of the present invention;

[0027] Figure 7 This is the invention Figure 6 Enlarged view of B in the middle;

[0028] Figure 8 This is a three-dimensional half-sectional view of the front side of the heating adjustment device of the present invention;

[0029] Figure 9 This is the invention Figure 8 A magnified view of C.

[0030] The markings in the diagram are as follows:

[0031] 1. Furnace body; 2. Furnace cover; 3. Baffle cover; 4. Discharge chamber; 5. Firing side plate; 6. Firing arc plate; 7. Rotating shaft; 8. Quick discharge device; 9. Heating adjustment device; 10. Clamping rail; 11. Slide rail; 12. Slide rod; 13. Arc-shaped clamping plate; 14. Trapezoidal lifting block; 15. Reciprocating screw; 16. Limiting ring; 17. Moving seat; 18. Trapezoidal pushing block; 19. Locking block; 81. Pad plate; 82. Electric... 83. Moving guide rail; 84. Telescopic bracket; 85. Push plate; 86. Lock; 87. Groove; 88. Slide groove; 89. Through groove; 80. Support rod; 810. Adjusting seat; 811. Pressure rod; 91. Partition plate; 92. Heating rod one; 93. Heating rod two; 94. Outer shell; 95. Connecting plate; 96. Telescopic rod one; 97. Sliding frame; 98. Fixing plate; 99. Telescopic rod two; 910. Coupling shaft; 911. Telescopic plate. Detailed Implementation

[0032] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0033] like Figure 1-9As shown, one embodiment of the present invention is a calcination apparatus for producing graphite electrodes, comprising: a furnace body 1, a furnace cover 2 hinged to the front side of the furnace body 1, a baffle 3 hinged to the front side of the furnace body 1, a discharge chamber 4 fixedly connected to the inner bottom surface of the furnace body 1, firing side plates 5 fixedly connected to both sides of the top of the discharge chamber 4, a firing arc plate 6 fixedly connected to the rear inner wall of the furnace body 1, a rotating shaft 7 rotatably connected to the inner rear surface of the furnace body 1, a quick discharge device 8 disposed at the bottom of the furnace body 1 for quickly removing the graphite electrode blank from the furnace body 1, and a heating adjustment device 9 disposed at the rear side of the furnace body 1 for promoting the heating of the hollow graphite electrode during sintering. To improve heat uniformity, the firing side plate 5 and the firing arc plate 6 wrap around the green blank, allowing heat to dissipate quickly, preventing local overheating, and resulting in more uniform heat distribution. This leads to a more consistent density and higher yield of the sintered green blank. The furnace body 1 includes a clamping rail 10, which is fixedly connected to the inner surface of the furnace body 1. Slide rails 11 are fixedly connected to the upper and lower sides of the clamping rail 10. A slide rod 12 is slidably connected to the inner surface of the slide rail 11. An arc-shaped clamping plate 13 is fixedly connected to the end of the slide rod 12 away from the inner wall of the furnace body 1. The furnace body 1 also includes a trapezoidal lifting block 14, which is fixedly connected to the side of the arc-shaped clamping plate 13 near the clamping rail 10. A locking block 19 is fixedly connected to the inclined surface of the trapezoidal lifting block 14. The reciprocating screw 15 is fixedly connected to the circumferential surface of the rotating shaft 7. A limit ring 16 is fixedly connected to the circumferential surface of the reciprocating screw 15. The moving seat 17 is threadedly connected to the circumferential surface of the reciprocating screw 15. A trapezoidal pushing block 18 is fixedly connected to the side of the moving seat 17 near the trapezoidal lifting block 14. The green blank is clamped by the sliding rod 12 and the arc-shaped clamping plate 13 to prevent shaking during sintering, prevent cracks, delamination or deformation, ensure the integrity of the graphite electrode structure, and further improve the yield rate. The rear end of the firing side plate 5 is fixedly connected to the rear side of the inner wall of the furnace body 1. The top end of the firing side plate 5 is fixedly connected to the lower surface of the clamping rail 10. The bottom end of the firing arc plate 6 is fixedly connected to the upper surface of the clamping rail 10. The sliding rod 12 is close to the furnace. A spring is provided between one end of the inner wall of body 1 and the inner surface of slide rail 11. The moving seat 17 is slidably connected to the inner surface of clamping rail 10. The trapezoidal push block 18 is slidably connected to the side surface of clamping rail 10. An inclined groove is provided on the inclined surface of trapezoidal push block 18, and the inclined groove is slidably connected to the locking block 19. The inclined surface of trapezoidal lifting block 14 and the inclined surface of trapezoidal push block 18 abut against each other. The rotating shaft 7 drives the reciprocating screw 15 and the limiting ring 16 to rotate, so that the moving seat 17 drives the trapezoidal push block 18 to slide back and forth. With the elastic reset of trapezoidal lifting block 14 and spring, the arc-shaped clamping plate 13 dynamically adjusts the clamping position to avoid uneven heating caused by local obstruction and further improve the uniformity of green billet temperature and density.

[0034] Working principle: Open furnace cover 2, and send the die-cast graphite electrode green blank into furnace body 1. Then close furnace cover 2, and start the heating device in the furnace to cause the loose powder particles to bind together and transform into a denser, stronger green blank. After sintering, send the green blank into unloading chamber 4, and then open cover 3 to remove the green blank. During the sintering process, the firing side plate 5 and firing arc plate 6 can wrap the outside of the green blank, allowing heat to dissipate quickly in furnace body 1, avoiding local overheating, making the heat more uniform, and thus making the density of the sintered green blank higher. To achieve a higher yield, after the green billet is fed into the furnace body 1, the control slide rod 12 slides within the slide rail 11 and approaches the green billet. The slide rod 12 then drives the arc-shaped clamping plate 13 to approach and clamp the green billet, preventing it from shaking during sintering and thus avoiding problems such as cracks, delamination, or deformation. This ensures the structural integrity of the graphite electrode and further improves the product yield. However, since the existing clamping device can only hold one part of the green billet stationary, it is easy to cause uneven heating of the green billet, resulting in a decrease in product quality. During the sintering process, the rotating shaft 7 is started, and the rotating shaft 7 drives the reciprocating screw 1 When the limit ring 16 rotates, the reciprocating screw 15 drives the moving seat 17 to slide back and forth within the clamping rail 10. Due to the restriction of the limit ring 16, the moving seat 17 can only move back and forth between the two limit rings 16. The moving seat 17 then drives the trapezoidal push block 18 to slide back and forth on the clamping rail 10. When the trapezoidal push block 18 moves, it pushes the trapezoidal lifting block 14 to move left and right through the guide of the inclined surface and the engagement of the locking block 19. When two opposite trapezoidal push blocks 18 are driven by the reciprocating screw 15 to move in one direction, one of the trapezoidal push blocks 18... The trapezoidal lifting block 14 and the arc-shaped clamping plate 13 are pushed close to and clamp the graphite electrode. However, due to the opposite guide surface of the other trapezoidal pushing block 18, the trapezoidal lifting block 14 loses pressure. At this time, the trapezoidal lifting block 14 is affected by the elastic reset effect of the arc-shaped clamping plate 13, the slide rod 12, and the spring between the slide rod 12 and the slide rail 11, and moves away from the graphite electrode, thereby releasing the restriction on the graphite electrode. This keeps the clamping device in a state of dynamic adjustment, avoids uneven heating caused by local obstruction, and further improves the uniformity of the green body temperature and density.

[0035] like Figure 1-9As shown, based on the above embodiment, the quick unloading device 8 includes a pad 81, which is hinged to both sides of the inner wall of the unloading chamber 4. A locking 85 is fixedly connected to the lower surface of the pad 81. An electric guide rail 82 is fixedly connected to the inner surface of the bottom of the unloading chamber 4. A telescopic bracket 83 is fixedly connected to the moving end of the electric guide rail 82. A push plate 84 is fixedly connected to the rear side of the telescopic bracket 83. A groove 86 is formed on both sides of the inner wall of the unloading chamber 4, supporting the green blank through the pad 81. After sintering, the remote-controlled locking 85 opens, and the pad 81 rotates downward to allow the billet to fall into the unloading chamber 4. The billet is caught by the telescopic locking seat 83. The quick unloading device 8 also includes a chute 87, which is located on the inner side of the bottom of the clamping rail 10. A pressure rod 811 is slidably connected to the inner surface of the chute 87. A through groove 88 is located on both sides of the top of the unloading chamber 4. A support rod 89 is hinged to the inner surface of the through groove 88. An adjusting seat 810 is threadedly connected to the circumferential surface of the reciprocating screw 15. The moving guide rail 82 drives the telescopic bracket 83 and push plate 84 forward to deliver the billet, eliminating the need to open the furnace cover 2. This avoids the temperature difference caused by the collision between external air and internal hot air, which could damage the graphite electrode, and also eliminates the need to wait for cooling, thus improving processing efficiency. A torsion spring is installed at the hinge of the pad plate 81 and the unloading chamber 4. The telescopic bracket 83 and the bottom surface of the inner wall of the unloading chamber 4 are slidably connected, as are the push plate 84 and the bottom surface of the inner wall of the unloading chamber 4. The front side of the telescopic bracket 83 abuts against the rear side of the cover 3. A torsion spring is provided at the hinge of the support rod 89 and the through groove 88. The top of the pressure rod 811 is fixedly connected to the lower surface of the adjusting seat 810. The support rod 89 is rotated and extended under the pad 81 by the influence of the torsion spring, which increases the support force and promotes sintering stability. When unloading, the reciprocating screw 15 drives the adjusting seat 810 and the pressure rod 811 to push the support rod 89 into the through groove 88. After the pad 81 loses its support, it slowly opens under the force of gravity and the torsion of the torsion spring, so that the graphite electrode falls smoothly into the unloading chamber 4 to complete the unloading.

[0036] Working principle: After the graphite electrode green billet is fed into the furnace body 1, the pad plate 81 supports it. After sintering, the locking device 85 is opened by remote control, thereby releasing the restriction on the pad plate 81. At this time, the pad plate 81 rotates downward under pressure, allowing the green billet to fall into the unloading chamber 4. After falling into the unloading chamber 4, the green billet is caught by the telescopic locking seat 83. Then, the cover 3 and the electric guide rail 82 are opened simultaneously. After the electric guide rail 82 is opened, it drives the telescopic locking seat 83 and the push plate 84 to move forward. The telescopic locking seat 83, in conjunction with the limiting action of the push plate 84, drives the graphite electrode green billet to extend forward out of the unloading chamber 4, thereby quickly removing the green billet and sending it to the next process, improving the ease of use of the device. Moreover, since the green billet is sent out through the unloading chamber 4, it is not necessary to open the furnace cover 2 during unloading, avoiding the temperature difference caused by the direct collision between the external air and the internal hot air, which affects the graphite electrode. This process avoids damage and eliminates the need to wait for the device to cool down before unloading, thus improving processing efficiency. During sintering, the support rod 89 rotates and extends under the pad 81 due to the torsion spring at its hinge with the through groove 88, supporting the pad 81 and increasing its support force, which promotes the stability of the graphite electrode during sintering. During unloading, the reciprocating screw 15 drives the adjusting seat 810 to move, and the adjusting seat 810 drives the pressure rod 811 to slide in the slide groove 87. As the pressure rod 811 moves, it pushes the support rod 89 to rotate and retract into the through groove 88. Then, the reciprocating screw 15 stops rotating, locking the support rod 89. At this time, the pad 81 loses its support, and the pad 81 itself, affected by the gravity of the graphite electrode and the torsion of the torsion spring at its hinge with the inner wall of the unloading chamber 4, slowly opens downward, allowing the graphite electrode to fall smoothly into the unloading chamber 4 to complete the unloading.

[0037] like Figure 1-9As shown, based on the above embodiment, the heating adjustment device 9 includes a partition 91, which is fixedly connected to the upper surface of the push plate 84. A telescopic plate 911 is slidably connected to the inner surface of the partition 91. The outer shell 94 is fixedly connected to the rear side of the furnace body 1. A heating rod 92 is installed inside the outer shell 94, and a second heating rod 93 is installed to the right of the first heating rod 92. After unloading, the electric guide rail 82 drives the telescopic bracket 83 and the push plate 84 to move backward and retract into the unloading chamber 4. The push plate 84 drives the partition 91 and the telescopic plate 911 to move backward, and the telescopic plate 911 pushes the sliding frame 97 to move backward and retract into the outer shell. 94. To facilitate the placement of green blanks, the heating adjustment device 9 also includes a sliding frame 97, which is slidably connected to the inner rear surface of the furnace body 1. A connecting plate 95 is fixedly connected to the rear end of the sliding frame 97. A first telescopic rod 96 is fixedly connected to the rear side of the inner wall of the furnace body 1. A fixed plate 98 is fixedly connected to the inner front surface of the sliding frame 97. A second telescopic rod 99 is fixedly connected to the front side of the connecting plate 95. A connecting shaft 910 is fixedly connected to the free end of the front side of the second telescopic rod 99. When processing hollow green blanks, the electric pull rod pulls the telescopic plate 911 to retract into the partition plate 91, and the sliding frame 97 stays inside the furnace body 1. Heating rod 1 (92) and heating rod 2 (93) heat the inner wall of the hollow graphite electrode, ensuring uniform heating both inside and out and improving sintering quality. An electric pull rod is installed between the interior of partition 91 and the lower surface of telescopic plate 911. The free end of telescopic rod 1 (96) slides through the rear side of the inner wall of furnace body 1 into the interior of outer shell 94. A spring is installed inside telescopic rod 1 (96) and telescopic rod 2 (99). The rear free end of telescopic rod 1 (96) is fixedly connected to the front side of connecting plate 95. Connecting plate 95 is slidably connected to the inner surface of outer shell 94. Sliding frame 97 is slidably connected to the inner surface of outer shell 94. Heating rod 1 (92)... The rear end and the rear side of the connecting plate 95 are fixedly connected. The rear side of the fixing plate 98 is fixedly connected to the front end of the heating rod 92. The heating rod 93 is slidably connected to the inner surface of the fixing plate 98. The rear side of the connecting shaft 910 abuts against the front side of the fixing plate 98. The rear side of the connecting shaft 910 is fixedly connected to the front end of the heating rod 93. Before sintering, the telescopic rod 96 and the telescopic rod 99 drive the sliding frame 97, the connecting plate 95, and the heating rod 93 to move forward, so that the heating rod 93 moves in front of the heating rod 92 to increase the heating distance, so as to achieve uniform sintering of solid or hollow green blanks and improve the applicability of the device.

[0038] Working principle: After unloading, the electric guide rail 82 drives the telescopic bracket 83 and push plate 84 to move backward and retract into the unloading chamber 4. When the push plate 84 moves backward, it drives the partition plate 91 and telescopic plate 911 to move backward. When the telescopic plate 911 moves backward, it pushes the sliding frame 97 to slide backward on the inner surface of the furnace body 1 and retract into the outer shell 94. At this time, the green blank can be placed into the furnace body 1 for sintering. When the graphite electrode to be processed is a hollow green blank, the electric pull rod set between the telescopic plate 911 and the partition plate 91 is activated. The electric pull rod pulls the telescopic plate 911 to retract into the partition plate 91. At this time, the partition plate 91 moves backward and cannot push the sliding frame 97, so that the sliding frame 97 stays in the furnace body 1. Heating rod 92 and heating rod 93 inside the moving frame 97 can heat the inner wall of the hollow graphite electrode, making the graphite electrode heated evenly inside and out, thus improving the quality of the hollow graphite electrode after sintering. Before sintering, the sliding frame 97 and the connecting plate 95 move forward and extend into the furnace body 1 under the pull of the telescopic rod 96 and its internal spring, while the heating rod 93 and the connecting shaft 910 slide forward in the fixed plate 98 under the pull of the telescopic rod 99 and its internal spring, thereby moving the heating rod 93 to the front of the heating rod 92, increasing the heating distance, so that the device can uniformly sinter solid or hollow graphite electrode blanks, improving the applicability of the device.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A calcination apparatus for producing graphite electrodes, characterized in that, include: Furnace body (1), the front side of the furnace body (1) is hinged with a furnace cover (2), the front side of the furnace body (1) is hinged with a baffle (3), the bottom inner surface of the furnace body (1) is fixedly connected with a discharge chamber (4), the top two sides of the discharge chamber (4) are fixedly connected with a firing side plate (5), the rear side of the inner wall of the furnace body (1) is fixedly connected with a firing arc plate (6), and the rear inner surface of the furnace body (1) is rotatably connected with a rotating shaft (7). Quick unloading device (8) is installed at the bottom of the furnace body (1) and is used to quickly remove graphite electrode blanks from the furnace body (1); Heating adjustment device (9) is located on the rear side of the furnace body (1). The heating adjustment device (9) is used to promote the uniformity of heating during the sintering of hollow graphite electrodes. The furnace body (1) includes: The clamping rail (10) is fixedly connected to the inner surface of the furnace body (1), and the upper and lower sides of the clamping rail (10) are fixedly connected to the slide rail (11). A slide rod (12) is slidably connected to the inner surface of the slide rail (11), and the slide rod (12) is close to the furnace body (1). A spring is provided between one end of the inner wall and the inner surface of the slide rail (11), and an arc-shaped clamp (13) is fixedly connected to one end of the slide rod (12) away from the inner wall of the furnace body (1). A trapezoidal lifting block (14) is fixedly connected to the side of the arc-shaped clamping plate (13) near the clamping rail (10), and a locking block (19) is fixedly connected to the inclined surface of the trapezoidal lifting block (14). A reciprocating lead screw (15) is fixedly connected to the circumferential surface of the rotating shaft (7); The movable seat (17) is threadedly connected to the circumferential surface of the reciprocating screw (15), and a trapezoidal push block (18) is fixedly connected to the side of the movable seat (17) near the trapezoidal lifting block (14). The quick unloading device (8) includes: A pad (81) is hinged to both sides of the inner wall of the unloading chamber (4), and a locking device (85) is fixedly connected to the lower surface of the pad (81). A slide groove (87) is formed on the inner side of the bottom of the clamping rail (10), and a pressure rod (811) is slidably connected to the inner surface of the slide groove (87). A through groove (88) is provided on both sides of the top of the unloading chamber (4). A support rod (89) is hinged to the inner surface of the through groove (88). A torsion spring is provided at the hinge point between the support rod (89) and the through groove (88). Adjustment seat (810) is threaded to the circumferential surface of reciprocating screw (15). The top end of pressure rod (811) is fixedly connected to the lower surface of adjustment seat (810). The bottom end of pressure rod (811) is used to push support rod (89) into through groove (88).

2. The calcination apparatus for producing graphite electrodes according to claim 1, characterized in that, The circumferential surface of the reciprocating screw (15) is fixedly connected to a limit ring (16).

3. The calcination apparatus for producing graphite electrodes according to claim 2, characterized in that, The rear end of the fire-bearing side plate (5) is fixedly connected to the rear side of the inner wall of the furnace body (1), the top end of the fire-bearing side plate (5) is fixedly connected to the lower surface of the clamping rail (10), the bottom end of the fire-bearing arc plate (6) is fixedly connected to the upper surface of the clamping rail (10), the moving seat (17) is slidably connected to the inner surface of the clamping rail (10), the trapezoidal push block (18) is slidably connected to the side surface of the clamping rail (10), the trapezoidal push block (18) has a groove on its inclined surface, and the groove is slidably connected to the locking block (19), and the inclined surface of the trapezoidal lifting block (14) abuts against the inclined surface of the trapezoidal push block (18).

4. The calcination apparatus for producing graphite electrodes according to claim 3, characterized in that, The quick unloading device (8) also includes: Electric guide rail (82), the electric guide rail (82) is fixedly connected to the bottom inner surface of the unloading chamber (4), and the moving end of the electric guide rail (82) is fixedly connected to a telescopic bracket (83). Push plate (84), which is fixedly connected to the rear side of telescopic bracket (83); The groove (86) is formed on both sides of the inner wall of the unloading chamber (4).

5. The calcination apparatus for producing graphite electrodes according to claim 4, characterized in that, A torsion spring is provided at the hinge of the pad (81) and the unloading chamber (4). The telescopic bracket (83) is slidably connected to the bottom surface of the inner wall of the unloading chamber (4). The push plate (84) is slidably connected to the bottom surface of the inner wall of the unloading chamber (4). The front side of the telescopic bracket (83) and the rear side of the cover (3) abut against each other.

6. The calcination apparatus for producing graphite electrodes according to claim 5, characterized in that, The heating regulating device (9) includes: Partition (91), the partition (91) is fixedly connected to the upper surface of the push plate (84), and the inner surface of the partition (91) is slidably connected to the telescopic plate (911). The outer shell (94) is fixedly connected to the rear side of the furnace body (1), and a heating rod (92) is provided inside the outer shell (94). Heating rod two (93) is located to the right of heating rod one (92).

7. The calcination apparatus for producing graphite electrodes according to claim 6, characterized in that, The heating regulating device (9) further includes: A sliding frame (97) is slidably connected to the inner surface of the rear side of the furnace body (1), and a connecting plate (95) is fixedly connected to the rear end of the sliding frame (97). Telescopic rod one (96), the telescopic rod one (96) is fixedly connected to the rear side of the inner wall of the furnace body (1); A fixing plate (98) is fixedly connected to the inner surface of the front side of the sliding frame (97); Telescopic rod two (99) is fixedly connected to the front side of the connecting plate (95), and the free end of the front side of the telescopic rod two (99) is fixedly connected to the connecting shaft (910).

8. The calcination apparatus for producing graphite electrodes according to claim 7, characterized in that, An electric pull rod is provided between the interior of the partition (91) and the lower surface of the telescopic plate (911). The free end of the first telescopic rod (96) slides through the rear side of the inner wall of the furnace body (1) and into the interior of the outer shell (94). A spring is provided inside the first telescopic rod (96), and a spring is provided inside the second telescopic rod (99). The rear free end of the first telescopic rod (96) is fixedly connected to the front side of the connecting plate (95). The connecting plate (95) is slidably connected to the inner surface of the outer shell (94). The sliding frame (97) and the inner surface of the outer shell (94) are slidably connected. The rear end of the first heating rod (92) is fixedly connected to the rear side of the connecting plate (95). The rear side of the fixing plate (98) is fixedly connected to the front end of the first heating rod (92). The second heating rod (93) is slidably connected to the inner surface of the fixing plate (98). The rear side of the connecting shaft (910) abuts against the front side of the fixing plate (98). The rear side of the connecting shaft (910) is fixedly connected to the front end of the second heating rod (93).

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