A preparation method for improving the bulk density of calcined coke

Abstract

The present application relates to the technical field of calcined coke discharging and packaging, in particular to a preparation method for improving the bulk density of calcined coke; specifically comprising the following steps: S1, coal raw material pretreatment; S2, coal raw material coking; S3, calcination treatment; S4, mechanical compaction; S5, heat treatment; S6, discharging and packaging; the step of discharging and packaging involves a discharging and packaging equipment for storing the calcined coke after heat treatment and cooling in the tank, the set opening mechanism can synchronously control the flaring and necking operations of the packaging bag, and the inner supporting mechanism can not only open the bag opening during the discharging and loading process, but also can regularize the shape of the discharging, so as to avoid the calcined coke in the packaging bag from tilting to one side and deviating after the discharging to a certain extent.

Description

Technical Field

[0001] This invention relates to the technical field of calcined coke feeding and packaging, specifically a method for improving the bulk density of calcined coke. Background Technology

[0002] Calcined coke is a solid fuel obtained through high-temperature calcination during coal coking. It possesses advantages such as high fixed carbon content, high calorific value, high mechanical strength, high compressive strength, low ash content, and extremely low volatile matter. It is widely used in metallurgical, ceramic, chemical, power, and building materials industries. Bulk density is a crucial parameter for evaluating the performance of calcined coke. Increasing the bulk density of calcined coke offers the following advantages: 1. Increased bulk density reduces the space required for transportation and storage, lowering transportation and storage costs; 2. Calcined coke can be used as a reducing agent in the metallurgical industry. The bulk density of calcined coke affects the charging amount and furnace utilization rate of blast furnace or electric furnace. The higher the density, the more calcined coke can be charged per unit furnace volume, thus improving the furnace utilization efficiency. 3. The bulk density of calcined coke affects the airflow distribution and heat transfer inside the blast furnace. Appropriately increasing the density is beneficial to improving the mass and heat transfer process of the reduction reaction and increasing the reduction efficiency. At present, the preparation methods to increase the bulk density of calcined coke generally include coal raw material pretreatment, coal raw material coking, calcination treatment, mechanical compaction, heat treatment and feeding and packaging, among which feeding and packaging is one of the most important steps.

[0003] The current method of unloading and packaging involves manually suspending packaging bags with hooks at the unloading port of the calcined coke storage box. The bottom of the suspended packaging bag is wrinkled, which causes the calcined coke to be pressed into the wrinkles. During the unloading process, the packaging bag needs to be shaken manually. If no intervention is taken during the unloading process, the shape of the calcined coke inside the packaging bag may become irregular, causing the packaging bag to tilt to one side, which will affect subsequent sealing and make subsequent stacking inconvenient. Summary of the Invention

[0004] This invention provides a method for preparing coke with increased bulk density after calcination, solving the problems existing in the prior art. The method comprises the following steps:

[0005] S1. Coal raw material pretreatment: Select high-quality coal with low ash content and low volatile matter as coal raw material, and pretreat the coal raw material by crushing and drying.

[0006] S2. Coal raw material coking: The pretreated coal raw material is put into the coking furnace for coking treatment. The coking furnace is slowly heated to 1000-1100 degrees Celsius and the coking time is extended to improve the degree of coking.

[0007] S3. Calcination treatment: The coking coal raw material is put into a calcining furnace for calcination treatment. The temperature of the calcining furnace is controlled at 1400-1500 degrees Celsius to obtain calcined coke particles.

[0008] S4. Mechanical compaction: The calcined coke particles are mechanically compacted using a hydraulic press.

[0009] S5. Heat treatment: The mechanically compacted calcined coke particles are subjected to high-temperature heat treatment.

[0010] S6. Feeding and Packaging: The calcined coke after heat treatment and cooling is fed and packaged using feeding and packaging equipment.

[0011] The S6 unloading and packaging step involves unloading and packaging equipment for calcined coke after heat treatment and cooling in the storage box. A unloading pipe is connected to the lower end of the storage box, and a valve is installed inside the unloading pipe. The unloading and packaging equipment includes a worktable with two symmetrically fixed limiting plates at the front and rear of its upper end. A conveyor for conveying packaging bags containing calcined coke is located at the upper end of the worktable and between the two limiting plates. A supporting mechanism is located above the conveyor to support the packaging bags during unloading. A mouth-opening mechanism is located below the storage box to control the opening and closing of the packaging bag. An internal support mechanism is located on the unloading pipe to open the inside of the packaging bag. A buffer mechanism is located below the supporting mechanism to buffer the descending packaging bag. The mouth-opening mechanism includes a four-jaw chuck fixedly connected to the lower end of the storage box via an electric telescopic rod. An L-shaped frame is fixedly connected to the jaws at the bottom of the four-jaw chuck, and a suspension hook is fixedly connected to the bottom of the transverse section of the L-shaped frame.

[0012] In one possible implementation, the supporting mechanism includes two lower support frames stacked front to back. One side of each lower support frame has a threaded hole in the front-back direction, and the other side of each lower support frame has a sliding hole in the front-back direction. The threaded holes on the two lower support frames are threaded together with a bidirectional threaded rod. The sliding holes on the two lower support frames are slidably connected to a limit guide rod. The two ends of the bidirectional threaded rod and the limit guide rod are respectively fixedly connected between limit plates. The upper ends of the two lower support frames are elastically connected to an upper support frame.

[0013] In one possible implementation, the inner support mechanism includes a feeding extension tube slidably connected to the feeding tube, and a plurality of arc-shaped inner support plates are circumferentially fixedly connected to the lower end of the feeding extension tube. The positions of the arc-shaped inner support plates are staggered from the positions of the L-shaped frame.

[0014] In one possible implementation, a plurality of blocking rods are elastically connected through the upper end of the side wall of the feeding extension tube near the top. A vertical groove is formed on the outer wall of the feeding tube corresponding to the position of the blocking rod. The side of the blocking rod near the feeding tube is slidably connected in the vertical groove. A limiting groove is formed at the upper end of the vertical groove. A magnet with opposite magnetic properties is provided on the side of the limiting groove opposite to the blocking rod.

[0015] In one possible implementation, the device further includes a shaking mechanism, which includes a timing plate fixedly connected to the upper end of the feeding extension tube via a connecting rod. The timing plate has two sets of arc-shaped teeth arranged front and rear on the side near the lower support frame, and a corresponding protruding tooth is fixedly connected to the side of the upper support frame near the timing plate.

[0016] In one possible implementation, the buffer mechanism includes a U-shaped frame located below the lower support frame. The U-shaped frame is elastically connected to the lower support frame via multiple elastic telescopic rods. A rotating shaft is rotatably connected to the U-shaped frame near the opening. Torsion springs are fixedly connected to both ends of the rotating shaft and the U-shaped frame. Multiple buffer rods along the axis of the rotating shaft are rotatably connected to the rotating shaft.

[0017] In one possible implementation, a mating groove is provided on the rotating shaft between two adjacent buffer rods, the buffer rods on the two rotating shafts are staggered, and the positions of the buffer rods on one rotating shaft correspond one-to-one with the mating grooves on the other rotating shaft.

[0018] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0019] 1. According to an embodiment of the present invention, a method for improving the bulk density of calcined coke is provided. Through the set opening support mechanism, the opening and closing operations of the packaging bag can be controlled simultaneously. In the process of feeding and loading, the inner support mechanism can not only open the bag opening, but also regulate the shape of the feeding, so as to prevent the calcined coke inside the packaging bag from tilting to one side and shifting after feeding to a certain extent.

[0020] 2. According to an embodiment of the present invention, a method for improving the bulk density of calcined coke is provided. By setting an upward drive, namely an electric telescopic rod, the support mechanism and the inner support mechanism can be driven to rise synchronously with the height of the loading. At the same time, the shaking mechanism can also be driven to increase the shaking amplitude of the support mechanism and increase the compactness of the material.

[0021] 3. According to the embodiment of the present invention, a method for improving the bulk density of calcined coke is provided. By setting a buffer mechanism, the probability of instantaneous tension damaging the opening mechanism is reduced after the packaging bag is packaged. Moreover, the buffer mechanism does not require a driving force. The multiple buffer designs provide better buffering effect for the packaging bag. Attached Figure Description

[0022] Figure 1 This is a flowchart of a method for improving the bulk density of calcined coke according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of a feeding and packaging equipment (excluding the buffer mechanism) for a method to improve the bulk density of calcined coke provided in an embodiment of the present invention.

[0024] Figure 3 This is a partial structural cross-sectional schematic diagram of a method for improving the bulk density of calcined coke provided in an embodiment of the present invention, involving a material feeding and packaging equipment.

[0025] Figure 4 This is a schematic diagram of the structure of the support mechanism and the inner support mechanism of the feeding and packaging equipment, which is a method for improving the bulk density of calcined coke provided in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the feeding extension pipe and feeding pipe connection of a feeding and packaging equipment, which is provided by an embodiment of the present invention to improve the bulk density of calcined coke.

[0027] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0028] Figure 7 This is a schematic diagram of the buffer mechanism structure of a feeding and packaging equipment, which is part of a method for improving the bulk density of calcined coke according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram illustrating the structural changes of the buffer mechanism in a material feeding and packaging equipment, which is part of a method for improving the bulk density of calcined coke according to an embodiment of the present invention.

[0030] In the diagram: 1. Storage box; 11. Feeding pipe; 2. Workbench; 21. Limiting plate; 22. Conveyor; 3. Supporting mechanism; 31. Lower support frame; 32. Upper support frame; 33. Bidirectional threaded rod; 34. Limiting guide rod; 4. Supporting mechanism; 41. Four-jaw chuck; 42. Electric telescopic rod; 43. L-shaped frame; 44. Suspension hook; 5. Internal support mechanism; 51. Feeding extension pipe; 52. Arc-shaped internal support plate; 53. Blocking rod; 54. Vertical groove; 6. Vibration mechanism; 61. Synchronizing plate; 62. Arc-shaped tooth; 63. Protruding tooth; 7. Buffer mechanism; 71. U-shaped frame; 72. Elastic telescopic rod; 73. Rotating shaft; 74. Buffer rod; 75. Connecting groove. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Please see Figure 1 A method for improving the bulk density of calcined coke, specifically including the following steps:

[0033] S1. Coal raw material pretreatment: Select high-quality coal with low ash content and low volatile matter as coal raw material, and pretreat the coal raw material by crushing and drying.

[0034] S2. Coal raw material coking: The pretreated coal raw material is put into the coking furnace for coking treatment. The coking furnace is slowly heated to 1000-1100 degrees Celsius and the coking time is extended to improve the degree of coking.

[0035] S3. Calcination treatment: The coking coal raw material is put into a calcining furnace for calcination treatment. The temperature of the calcining furnace is controlled at 1400-1500 degrees Celsius to obtain calcined coke particles.

[0036] S4. Mechanical compaction: The calcined coke particles are mechanically compacted using a hydraulic press.

[0037] S5. Heat treatment: The mechanically compacted calcined coke particles are subjected to high-temperature heat treatment.

[0038] S6. Feeding and Packaging: The calcined coke after heat treatment and cooling is fed and packaged using feeding and packaging equipment.

[0039] See Figure 2 , Figure 3 and Figure 7The S6 unloading and packaging step involves unloading and packaging equipment for calcined coke after heat treatment and cooling in storage box 1. The lower end of storage box 1 is connected to a unloading pipe 11, and a valve is installed in the unloading pipe 11. The unloading and packaging equipment includes a workbench 2, with two limiting plates 21 symmetrically fixedly connected to the front and rear of the upper end of the workbench 2. A conveyor 22 for conveying packaging bags containing calcined coke is installed on the upper end of the workbench 2 and between the two limiting plates 21. A supporting mechanism 3 is installed above the conveyor 22 for supporting the packaging bags during unloading. The opening support mechanism 4 is located below the storage box 1 and is used to control the opening and closing of the packaging bag; the inner support mechanism 5 is located on the feeding pipe 11 and is used to open the inside of the packaging bag; the buffer mechanism 7 is located below the support mechanism 3 and is used to buffer the descending packaging bag; wherein, the opening support mechanism 4 includes a four-jaw chuck 41 fixedly connected to the lower end of the storage box 1 by an electric telescopic rod 42, an L-shaped frame 43 fixedly connected to the jaws at the bottom of the four-jaw chuck 41, and a suspension hook 44 fixedly connected to the bottom of the transverse section of the L-shaped frame 43.

[0040] During operation, an empty packaging bag is placed on the supporting mechanism 3, and the hook on the bag opening is hooked onto the suspension hook 44. At this time, the jaws on the four-jaw chuck 41 move multiple L-shaped frames 43 close together. Due to the spatial arrangement, the lower end of the packaging bag is pleated, as shown in storage box 1. Simultaneously, the bottom of the inner support mechanism 5 is above the suspension hook 44. An external drive source moves the jaws away from the center, causing the L-shaped frames 43 to move the suspension hook 44 away from the center, thus opening the bag opening. The inner support mechanism 5 is then moved downwards, further opening the inside of the packaging bag. At this point, the valve (not shown) in the discharge pipe 11 is opened, and the storage bag is discharged. The calcined coke in box 1 enters the packaging bag through the inner support mechanism 5. During the loading of the calcined coke, the opening support mechanism 4 and the inner support mechanism 5 are slowly moved upward. When the packaging bag is full of calcined coke, the valve is closed and the support mechanism 3 is opened at the same time. The opening support mechanism 4 drives the packaging bag to descend until the bottom of the packaging bag is lowered to the top of the conveyor 22. At this time, multiple L-shaped frames 43 drive the suspension hooks 44 to move towards the center of the four-jaw chuck 41. The suspension hooks 44 drive the bag opening to perform a closing operation, which is convenient for manual or existing strapping machines to tie the bag opening. At the same time, the suspension hooks 44 are removed from the hooks on the bag opening. The conveyor 22 transports the packaging bag containing calcined coke to the palletizing area to facilitate subsequent palletizing operations.

[0041] See Figure 3The supporting mechanism 3 includes two lower supporting frames 31 stacked front to back. One side of the two lower supporting frames 31 has a threaded hole in the front-back direction, and the other side of the two lower supporting frames 31 has a sliding hole in the front-back direction. The threaded holes on the two lower supporting frames 31 are threadedly connected to a bidirectional threaded rod 33. The sliding holes on the two lower supporting frames 31 are slidably connected to a limit guide rod 34. The two ends of the bidirectional threaded rod 33 and the limit guide rod 34 are respectively fixedly connected between the limit plates 21. The upper ends of the two lower supporting frames 31 are elastically connected to an upper supporting frame 32.

[0042] It should be noted that the elastic connection between the upper end of the lower support frame 31 and the upper support frame 32 can be a spring telescopic rod. While the upper support frame 32 can move up and down above the lower support frame 31, it does not affect the movement of the upper support frame 32 above each of the two lower support frames 31 in the front and back directions. In specific operation, during the packaging of calcined coke in the packaging bag, the upper support frame 32 provides elastic support to the bottom of the packaging bag, so that the calcined coke added into the packaging bag plays a buffering role. It also allows the calcined coke added to the opening mechanism 4 to vibrate and compact during the upward process, enhancing the compactness of the added calcined coke. After the packaging bag is packaged, the bidirectional threaded rod 33 is driven by an external drive source to rotate. The two lower support frames 31 on the bidirectional threaded rod 33 move away from each other. The two lower support frames 31 simultaneously drive the upper support frame 32 to move away from each other until the gap between the two lower support frames 31 can not obstruct the packaging bag filled with calcined coke from falling.

[0043] participate Figure 4 , Figure 5 and Figure 6 The inner support mechanism 5 includes a feeding extension tube 51 slidably connected to the feeding tube 11. Multiple arc-shaped inner support plates 52 are circumferentially fixedly connected to the lower end of the feeding extension tube 51. The positions of the arc-shaped inner support plates 52 are offset from the positions of the L-shaped frame 43. Multiple blocking rods 53 are elastically connected through the upper end of the side wall of the feeding extension tube 51 near the top. A vertical groove 54 is formed on the outer wall of the feeding tube 11 corresponding to the position of the blocking rod 53. The side of the blocking rod 53 closest to the feeding tube 11 is slidably connected within the vertical groove 54. A limiting groove is formed at the upper end of the vertical groove 54, and a magnet with opposite magnetic properties is provided on the side of the limiting groove opposite to the blocking rod 53.

[0044] In the initial state, the blocking rod 53 is in a docking state with the limiting groove. The blocking rod 53 consists of an annular sleeve and a limiting rod that passes through the annular sleeve and is elastically connected inside the annular sleeve. The annular sleeve is fixedly connected to the feeding extension tube 51, and the limiting rod can slide elastically on the side wall of the feeding extension tube 51. During operation, since the blocking rod 53 is initially docked with the limiting groove, it drives the feeding extension tube 51 to the highest point of the feeding tube 11. When the opening mechanism 4 opens the bag opening of the packaging bag, it simultaneously pulls multiple limiting rods, and the limiting rods and limiting grooves... The adsorbed magnets are separated, and the limiting rod moves within the vertical groove 54 until the lower end of the limiting rod contacts the upper end of the four-jaw chuck 41. The four-jaw chuck 41 blocks the limiting rod. As the four-jaw chuck 41 rises, it also drives the feeding extension tube 51 to move upward. The arc-shaped inner support plate 52 is always in close contact with the inside of the packaging bag, and plays a guiding role when loading the calcined coke to better determine the shape of the calcined coke inside the packaging bag, so as to avoid large deformation of the packaging bag and affect the normal loading of the packaging bag.

[0045] See Figure 3 It also includes a shaking mechanism 6, which includes a timing plate 61 fixedly connected to the upper end of the feeding extension tube 51 via a connecting rod. The timing plate 61 has two sets of arc-shaped teeth 62 arranged in front and behind on the side near the lower support frame 31, and the upper support frame 32 has corresponding protruding teeth 63 fixedly connected to the side near the timing plate 61.

[0046] During operation, as the feeding extension pipe 51 rises, it will simultaneously drive the synchronous plate 61 to move upward. As a result, the arc-shaped teeth 62 on the synchronous plate 61 will intermittently contact the protruding teeth 63, increasing the vibration of the upper support frame 32. This will cause the packaging bag supported by the upper end of the upper support frame 32 to vibrate continuously during the packaging process, thereby increasing the compaction effect.

[0047] See Figure 7 and Figure 8 The buffer mechanism 7 includes a U-shaped frame 71 located below the lower support frame 31. The U-shaped frame 71 is elastically connected to the lower support frame 31 via multiple elastic telescopic rods 72. A rotating shaft 73 is rotatably connected to the U-shaped frame 71 near its opening. Torsion springs are fixedly connected between the two ends of the rotating shaft 73 and the U-shaped frame 71. Multiple buffer rods 74 are rotatably connected to the rotating shaft 73 along its axial direction. A mating groove 75 is provided on the rotating shaft 73 between two adjacent buffer rods 74. The positions of the buffer rods 74 on the two rotating shafts 73 are staggered, and the positions of the buffer rods 74 on one rotating shaft 73 correspond one-to-one with the mating grooves 75 on the other rotating shaft 73.

[0048] The buffer mechanism 7 is designed to enhance the stability of the two lower support frames 31 during support and to cushion the packaging bag during descent. Specifically, when the two lower support frames 31 separate, the heavy packaging bag filled with calcined coke presses down on the upper support frame 32, bringing it closer to the lower support frame 31. At the instant the lower support frame 31 pulls the upper support frame 32 apart, the packaging bag experiences a significant downward impact. The bottom of the packaging bag falls onto the interlocking buffer bars 74, causing the buffer bars 74 to rotate slightly. Simultaneously, the elastic telescopic bar 72 is stretched by the impact force of the packaging bag. This double cushioning reduces the impact on the packaging bag at the moment it loses its support. The tension of the suspension hook 44 is reduced, thereby reducing the damage caused by excessive instantaneous force on the suspension hook 44. It should be noted that no matter how the buffer rod 74 rotates, it will not contact the upper end of the conveyor 22. When the packaging bag descends to the upper end of the conveyor 22, the buffer rod 74 provides front and rear support and limit for the packaging bag. When the conveyor 22 is conveying, since the buffer rod 74 is rotatably connected to the rotating shaft 73, the buffer rod 74 will not obstruct the conveying packaging bag until the packaging bag no longer contacts the buffer rod 74. Under the action of the torsion spring, the buffer rod 74 will return to a horizontal state. Then, by moving the two lower support frames 31 closer together, the buffer rod 74 will re-connect with the docking groove 75.

[0049] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for improving the bulk density of calcined coke, characterized by: Specifically, the following steps are included: S1. Coal raw material pretreatment: Select high-quality coal with low ash content and low volatile matter as coal raw material, and pretreat the coal raw material by crushing and drying. S2. Coal raw material coking: The pretreated coal raw material is put into a coking furnace for coking treatment. The coking furnace is slowly heated to 1000-1100 degrees Celsius and the coking time is extended to improve the degree of coking. S3. Calcination treatment: The coking coal raw material is put into a calcining furnace for calcination treatment. The temperature of the calcining furnace is controlled at 1400-1500 degrees Celsius to obtain calcined coke particles. S4. Mechanical compaction: The calcined coke particles are mechanically compacted using a hydraulic press. S5. Heat treatment: The mechanically compacted calcined coke particles are subjected to high-temperature heat treatment. S6. Feeding and Packaging: The calcined coke after heat treatment and cooling is fed and packaged using feeding and packaging equipment. Among them, the S6 feeding and packaging step involves feeding and packaging equipment for calcined coke after heat treatment and cooling in the storage box. The lower end of the storage box is connected to a feeding pipe, and a valve is installed in the feeding pipe. The feeding and packaging equipment includes a worktable. Two limiting plates are symmetrically fixedly connected to the front and back of the upper end of the worktable. A conveyor for conveying the calcined coke packaging bag is installed on the upper end of the worktable and between the two limiting plates. The supporting mechanism, located above the conveyor, is used to support the packaging bags during the unloading process; The opening support mechanism, located below the storage box, is used to control the opening and closing of the packaging bag. The internal support mechanism, located on the feed tube, is used to expand the inside of the packaging bag; The cushioning mechanism, located below the supporting mechanism, is used to cushion the descending packaging bag. The support mechanism includes a four-jaw chuck fixedly connected to the lower end of the storage box via an electric telescopic rod. An L-shaped frame is fixedly connected to the jaws at the bottom of the four-jaw chuck, and a suspension hook is fixedly connected to the bottom of the transverse section of the L-shaped frame. The support mechanism includes two lower support frames stacked front to back. One side of each lower support frame has a threaded hole in the front-back direction, and the other side of each lower support frame has a sliding hole in the front-back direction. The threaded holes on the two lower support frames are threaded together to a bidirectional threaded rod. The sliding holes on the two lower support frames are slidably connected to a limit guide rod. The two ends of the bidirectional threaded rod and the limit guide rod are respectively fixedly connected between limit plates. The upper ends of the two lower support frames are elastically connected to an upper support frame. The buffer mechanism includes a U-shaped frame located below the lower support frame. The U-shaped frame is elastically connected to the lower support frame through multiple elastic telescopic rods. A rotating shaft is rotatably connected to the U-shaped frame near the opening. Torsion springs are fixedly connected to both ends of the rotating shaft and the U-shaped frame. Multiple buffer rods along the axis of the rotating shaft are rotatably connected to the rotating shaft. A mating groove is provided on the rotating shaft between two adjacent buffer rods. The buffer rods on the two rotating shafts are staggered, and the positions of the buffer rods on one rotating shaft correspond one-to-one with the mating grooves on the other rotating shaft.

2. The preparation method for improving the bulk density of calcined coke according to claim 1, characterized in that: The inner support mechanism includes a feeding extension pipe slidably connected to the feeding pipe, and a plurality of arc-shaped inner support plates are fixedly connected to the lower end of the feeding extension pipe in a circumferential direction. The positions of the arc-shaped inner support plates are staggered from the positions of the L-shaped frame.

3. The method for preparing calcined coke with increased bulk density according to claim 2, characterized in that: Multiple blocking rods are elastically connected through the upper end of the side wall of the feeding extension tube near the top. A vertical groove is opened on the outer wall of the feeding tube corresponding to the position of the blocking rod. The side of the blocking rod near the feeding tube is slidably connected in the vertical groove. A limiting groove is opened at the upper end of the vertical groove. A magnet with opposite magnetic properties is provided on the side of the limiting groove opposite to the blocking rod.

4. The preparation method for improving the bulk density of calcined coke according to claim 1, characterized in that: It also includes a shaking mechanism, which includes a timing plate fixedly connected to the upper end of the feeding extension tube by a connecting rod. The timing plate has two sets of arc-shaped teeth arranged in front and behind on the side near the lower support frame, and the upper support frame has corresponding protruding teeth fixedly connected on the side near the timing plate.

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