A steelmaking powder pelletizing device

Abstract

This invention provides a steelmaking powder pelletizing device that increases the density and strength of the pellets, improving the pelletizing performance and meeting the strength requirements of the pellets. The device includes a pre-crushing unit for pre-crushing the pre-crushed material; a quantitative feeding unit for intermittently feeding the pre-crushed material to a re-crushing unit via three separate feeds; the re-crushing unit includes a crushing cylinder with three crushing chambers, each equipped with a crushing roller assembly with a gradient between the rollers to crush the pre-crushed material to a predetermined degree; a mixing cylinder in the middle of the crushing cylinder, connected to the crushing chambers, with a guide plate inclined below the crushing roller assembly and extending into the mixing cylinder; and stirring blades inside the mixing cylinder for agitating the secondary-crushed material to obtain a mixture; and a pelletizing unit for pressing the mixture to form finished pellets.

Description

Technical Field

[0001] This invention relates to the field of renewable resources, and more particularly to a pelletizing apparatus for steelmaking powder. Background Technology

[0002] Aluminum-calcium synthetic slag pellets are suitable as metallurgical auxiliary materials for steelmaking refining furnaces. They exhibit excellent deoxidation and desulfurization effects, effectively altering the fluidity of molten steel, resolving nozzle nodule formation problems, and improving alloy yield. They are adaptable to deoxidation in various steelmaking processes, particularly suitable for converter steelmaking. In related technologies, aluminum-calcium synthetic slag pellets are obtained by combining steel slag, lime, and scrap aluminum, processed through crushing and pelletizing equipment. Current pelletizing devices suffer from drawbacks such as low pellet quality, loose pellet structure, and susceptibility to breakage, affecting transportation and use. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention aims to provide a steelmaking powder pelletizing device that increases the density and strength of the pellets, improves the pelletizing performance of the material, and meets the strength requirements of the pellets.

[0004] To achieve the above objectives, the present invention provides a steelmaking powder pelletizing device, comprising a pre-crushing unit, a quantitative feeding unit, a re-crushing unit, and a pelletizing unit arranged sequentially according to the process flow, wherein:

[0005] The pre-crushing unit is used to pre-crush the pre-crushed material to obtain the pre-crushed material;

[0006] The quantitative feeding unit is used to intermittently feed pre-crushed material to the re-crushing unit in three separate streams;

[0007] The re-grinding unit includes a grinding cylinder with three grinding chambers. Each of the three grinding chambers receives pre-grinding material conveyed by a quantitative conveying unit. Each of the three grinding chambers is equipped with a grinding roller assembly with a gradient in the gap between the rollers, used to grind the pre-grinding material to a predetermined degree, forming coarse, medium, and fine powder particles respectively. A mixing cylinder is also provided in the middle of the grinding cylinder. The inner cavity of the mixing cylinder is connected to the grinding chamber. A guide plate is provided in the grinding chamber. The guide plate is inclined and located below the grinding roller assembly, with its lower end extending into the mixing cylinder. A stirring blade is provided in the mixing cylinder. The stirring blade is used to stir the coarse, medium, and fine powder particles to obtain a powder mixture.

[0008] The pelletizing unit is used to press the powder mixture into pellets.

[0009] In some embodiments, the quantitative feeding unit includes a hopper and a bin that are interconnected. A feeding plate is provided at the connection between the hopper and the bin, and the feeding plate has multiple feeding ports. A discharge plate is fixedly installed at the bottom of the bin, and the discharge plate has multiple elongated discharge ports. The number of discharge ports is the same as the number of feeding ports. A station plate is rotatably connected inside the bin. The station plate is connected to a rotary drive mechanism and is driven to rotate by the rotary drive mechanism. Two material cavity groups are formed on the station plate. Each material cavity group includes material cavities with the same number of feeding ports and a predetermined capacity. After the station plate rotates a predetermined angle, multiple material cavities in one material cavity group are respectively connected to the feeding ports of multiple bins, and multiple material cavities in the other material cavity group are respectively connected to the discharge ports of the bins.

[0010] In some embodiments, the workstation includes a support plate and six partitions connected to the support plate. The support plate is located above the discharge plate, and six material passages are formed through the support plate. The six partitions, the support plate, and the inner wall of the hopper enclose a first material cavity, a second material cavity, a third material cavity, a fourth material cavity, a fifth material cavity, and a sixth material cavity. The first and second material cavities are adjacent to each other and have the same capacity. The third and fourth material cavities are adjacent to each other and have the same capacity. The fifth and sixth material cavities are adjacent to each other and have the same capacity. After the workstation rotates by a predetermined angle, the first, third, and fifth material cavities are connected to the inlet of the hopper, and the second, fourth, and sixth material cavities are connected to the outlet of the hopper. Alternatively, the first, third, and fifth material cavities are connected to the outlet of the hopper, and the second, fourth, and sixth material cavities are connected to the inlet of the hopper.

[0011] In some embodiments, the discharge port and the feed port of the hopper are both elongated. After the work station plate rotates at a predetermined angle, three feed holes are connected to the discharge ports of the three hoppers one by one. The length direction of the discharge port is consistent with the axial direction of the crushing roller assembly.

[0012] In some embodiments, each crushing roller assembly has a crushing roller shaft extending into the mixing cylinder. A first bevel gear is mounted on the crushing roller shaft extending into the mixing cylinder. Three rotating shafts are rotatably connected inside the mixing cylinder. The axes of the three rotating shafts extend vertically, and a second bevel gear is mounted on the top of each of the three rotating shafts. The three first bevel gears and the three second bevel gears mesh and drive each other. Pulleys are also mounted on the three rotating shafts, and the pulleys of the three rotating shafts are driven by belts. The shaft of one of the crushing rollers is driven to rotate by a crushing motor.

[0013] In some embodiments, the mixing cylinder includes an upper cavity and a lower cavity, which are separated by a partition plate. The first bevel gear and the second bevel gear are both disposed in the upper cavity. A mixing shaft is rotatably connected in the lower cavity. A portion of the mixing shaft extends out of the partition plate and into the upper cavity. The mixing shaft is connected to the rotating shaft by a belt drive pair. Mixing blades are also fitted at the bottom of the mixing shaft.

[0014] In some embodiments, the crushing roller assembly includes cooperating crushing rollers. Each crushing roller includes a roller body and a roller shaft. Multiple retaining rings are spaced apart within the roller body, distributed axially along the roller body. The roller shaft, retaining rings, and roller body enclose multiple flow guide chambers. Water permeable holes are also provided through the retaining rings, and adjacent flow guide chambers are connected through these holes. The roller shaft has an opening at one end located outside the crushing cylinder, and has an inlet channel and an outlet channel communicating with the opening. The inlet channel and outlet channel are coaxially arranged with the roller shaft. The depth of the inlet channel is greater than the depth of the outlet channel. The inlet channel has a circular cross-section. The outlet channel is located outside the inlet channel and has an annular cross-section. The inlet channel communicates with the flow guide chambers away from the inner wall of the crushing cylinder, and the outlet channel communicates with the flow guide chambers close to the inner wall of the crushing cylinder.

[0015] In some embodiments, both crushing rollers of the crushing roller assembly are rotatably connected to a guide plate. The guide plate has two inlet connectors and an outlet connector. One end of the roller shaft extends outward to form a sealing part. The sealing part has a water passage that communicates with the outlet channel. The outlets of the two inlet connectors are respectively connected to the two inlet channels of the crushing roller assembly, and the inlets of the two outlet connectors are respectively connected to the two outlet channels of the crushing roller assembly. The inlet of one inlet connector is connected to the outlet of one outlet connector, so that the outlet channel of one crushing roller is connected to the inlet channel of the other crushing roller. The inlet of the other inlet connector is connected to the outlet of the water storage tank through a pipe, and the outlet of the other outlet connector is connected to the inlet of another water storage tank through a pipe.

[0016] In some embodiments, a first seal and a second seal are sealed together between the sealing portion and the diversion plate. The first seal is located outside the water inlet channel, and the second seal is located outside the water outlet channel. Both the first and second seals include a sealing ring and a rubber ring. The rubber ring is placed between the sealing portion and the sealing ring. The sealing ring is squeezed between the rubber ring and the diversion plate. The sealing ring has a plane that contacts the diversion plate.

[0017] In some embodiments, a fifth sealing groove is provided on the outer periphery of the sealing part, and a sixth sealing groove is provided on the diversion plate. The fifth sealing groove and the sixth sealing groove cooperate to form a third sealing cavity, and a third sealing element is sealedly housed in the third sealing cavity.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The steelmaking powder pelletizing device proposed in this invention produces compact steel balls with increased density and strength, thus improving the pelletizing performance of the material and meeting the strength requirements of the pellets.

[0020] The pre-crushed material is pre-crushed in a pre-crushing unit to obtain pre-crushed powder. After exiting the pre-crushing unit, the pre-crushed powder is lifted upwards to a quantitative feeding unit via a screw conveyor or pump. From the quantitative feeding unit, the pre-crushed powder is intermittently fed to a re-crushing unit through multiple channels. The re-crushing unit further crushes the pre-crushed powder to different degrees, forming coarse, medium, and fine particles. These three different particle sizes are then thoroughly mixed to obtain a material mixture. Finally, the pelletizing unit compresses the secondary-crushed material mixture to form finished pellets. This process enables the pelletizing of pre-crushed material with tight process connections and a high degree of automation, making it particularly suitable for continuous industrial processing.

[0021] The pre-crushing unit is used to pre-crush the pre-crushed material to obtain pre-crushed material with a particle size of 9-10 mm. By pre-crushing the material, material accumulation in the re-crushing unit due to excessively large feed particles is avoided, which helps to ensure crushing efficiency and the service life of the re-crushing unit.

[0022] The quantitative conveying unit will convey a predetermined amount of pre-crushed material in three separate channels. The re-crushing unit will then crush the pre-crushed material in the three channels to different degrees, forming coarse, medium, and fine particles. The three different particle sizes will be thoroughly mixed. The coarse particles will act as aggregates, while the fine particles will act as matrix materials. The different particle sizes will help the smaller particles fill the gaps between the larger particles to achieve a close arrangement. This will increase the density and strength of the pellets, improve the pelletizing performance of the material, and meet the strength requirements of the pellets.

[0023] During the rotation of the crushing rollers in one of the crushing roller groups driven by the crushing motor, the crushing roller group driven by the crushing motor drives the crushing rollers of the other two crushing roller groups to rotate through a bevel gear pair and a belt drive pair, achieving the purpose of simultaneously driving the operation of three crushing roller groups through a single crushing drive mechanism. Since a single crushing motor can simultaneously drive three crushing roller groups to perform different degrees of crushing operations on the pre-crushed material, manufacturing costs are saved. Furthermore, since only one crushing motor switch is needed to operate all three crushing roller groups, achieving three different levels of crushing precision, the operation method is also more convenient.

[0024] While the crushing motor drives the crushing roller assembly for crushing operations, the crushing roller assembly drives the mixing shaft to rotate via bevel gear pairs and belt drives. This causes the mixing blades mounted on the mixing shaft to continuously stir the pre-crushed material from the secondary crushing process, thoroughly mixing coarse, medium, and fine particles to ensure a uniform particle size distribution in the material mixture. This guarantees the quality of the steelmaking powder after it is pressed into pellets. Furthermore, by further utilizing the existing crushing motor, the utilization rate of the crushing motor is improved, saving manufacturing costs. Moreover, both the secondary crushing and mixing processes are completed inside the crushing drum, achieving effective utilization of the internal space of the crushing drum, resulting in a compact structure and a more rational spatial arrangement of the entire device.

[0025] A circulating pump circulates the cooling medium within the three crushing roller sets. This circulation absorbs the heat generated during roller operation, reducing temperature rise and allowing for stable long-term operation. Furthermore, three water tanks are positioned between adjacent roller sets. The cooling medium flowing from one set is first cooled in a tank before entering the next. This initial cooling ensures more even cooling of the three roller sets, resulting in uniform temperature distribution within the crushing cylinder and preventing localized overheating. Finally, the staggered arrangement of the roller sets and water tanks within the crushing cylinder maximizes internal space, resulting in a compact structure and efficient spatial layout.

[0026] The first sealing element isolates the inlet and outlet water channels, creating a first seal to prevent the cooling medium in the inlet channel from seeping into the outlet channel. The second sealing element isolates the inlet and outlet water channels, creating a second seal to prevent the cooling medium in the outlet channel from seeping outwards. Attached Figure Description

[0027] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0028] Figure 1This is an overall schematic diagram of the steelmaking powder pelletizing device proposed in this invention;

[0029] Figure 2 yes Figure 1 Schematic diagram showing the locations of the quantitative feeding unit and the re-grinding unit;

[0030] Figure 3 yes Figure 2 A schematic diagram of the overall structure of the medium-quantity feeding unit;

[0031] Figure 4 yes Figure 3 A bottom view;

[0032] Figure 5 and Figure 6 yes Figure 3 Schematic diagram of the structure of the middle workstation panel;

[0033] Figure 7 yes Figure 2 Schematic diagram of the medium-sized crushing unit;

[0034] Figure 8 yes Figure 7 A schematic diagram of the structure of the section containing the intermediate mixing cylinder;

[0035] Figure 9 yes Figure 7 Schematic diagram of the internal structure of the intermediate mixing cylinder;

[0036] Figure 10 This is a schematic diagram of the cooperation between the crushing roller and the guide plate in the steelmaking powder pressing and pelletizing device proposed in this invention;

[0037] Figure 11 yes Figure 10 A schematic diagram showing the location of the central drainage plate;

[0038] Figure 12 yes Figure 11 A schematic diagram of the structure where the first seal is located;

[0039] Figure 13 yes Figure 1 A schematic diagram of the feeding device and the forming device.

[0040] Explanation of icon numbers:

[0041] 1. Pre-crushing unit; 2. Screw conveyor; 3. Quantitative feeding unit; 4. Re-crushing unit; 5. Feeding device; 6. Forming device;

[0042] 31. Hopper; 32. Feed plate; 321. Feed inlet; 33. Storage bin; 34. Work station plate; 341. Support plate; 3411. Feed outlet; 342. Discharge plate; 351. Discharge outlet; 361. First material chamber; 362. Second material chamber; 363. Third material chamber; 364. Fourth material chamber; 365. Fifth material chamber; 366. Sixth material chamber; 371. Rotating shaft;

[0043] Crushing cylinder 41; Crushing chamber 411;

[0044] Mixing cylinder 42; upper cavity 421; lower cavity 422;

[0045] First water storage tank 431; Second water storage tank 432; Third water storage tank 433;

[0046] Upper pulley 441; transmission gear 451;

[0047] First diversion plate 461; Second diversion plate 462; Third diversion plate 463; Inlet connector 4611; Outlet connector 4612;

[0048] Crushing roller assembly 47; First crushing roller 471; Second crushing roller 472; Third crushing roller 473; Fourth crushing roller 474; Fifth crushing roller 475; Sixth crushing roller 476; Guide plate 477; Roller shaft 4712;

[0049] Roller body 4711; Roller shaft 4712; Guide chamber 4713; Retaining ring 4714; Water inlet channel 4715; Water outlet channel 4716; Sealing part 4717; First bevel gear 481; Second bevel gear 482; First seal 483; Sealing ring 4831; Rubber ring 4832; Second seal 484; Third seal 485; Mixing shaft 491; Mixing blade 492; First material cylinder 51; Second material cylinder 52; Conveying screw 53; Feeding screw 54; Left forming roller 61; Right forming roller 62. Detailed Implementation

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0051] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0052] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0053] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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.

[0054] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] See the attached instruction manual. Figure 1-13 This embodiment proposes a steelmaking powder pelletizing device, which includes a pre-crushing unit 1, a quantitative feeding unit 3, a re-crushing unit 4 and a pelletizing unit arranged in sequence according to the process flow.

[0056] The pre-crushing unit 1 is used to pre-crush materials such as steel slag, lime, waste aluminum, and waste silicon to obtain pre-crushed material with a particle size of approximately 9-10 mm. This preliminary crushing of materials like steel slag, lime, waste aluminum, and waste silicon prevents material accumulation in the re-crushing unit 4 due to excessively large feed particles, thus helping to ensure crushing efficiency and extend the service life of the re-crushing unit 4. As an example, the pre-crushing unit 1 includes a roller mill. Using a roller mill allows for high-precision crushing of materials such as steel slag, lime, waste aluminum, and waste silicon, resulting in uniform pre-crushed material and stable output. It is understood that those skilled in the art can select appropriate crushing equipment based on operational requirements; this embodiment does not impose any special limitations.

[0057] After being discharged from the pre-crushing unit 1, the pre-crushed material is lifted upwards by the screw conveyor 2 or the pump to the quantitative feeding unit 3. The quantitative feeding unit 3 is used to intermittently feed the pre-crushed material to the re-crushing unit 4 in multiple directions.

[0058] See the attached instruction manual. Figures 2 to 6 The quantitative feeding unit 3 includes a hopper 31 and a silo 33 that are interconnected. A feeding plate 32 is provided at the connection between the hopper 31 and the silo 33. The feeding plate 32 has multiple feeding ports 321, which are arranged in a ring at intervals. The silo 33 is generally a hollow rotating structure. A discharge plate 35 is fixedly installed at the bottom of the silo 33. The discharge plate 35 has multiple discharge ports 351, which are elongated and are arranged at intervals around the central axis of the silo 33.

[0059] A workstation disk 34 is rotatably connected inside the hopper 33. The workstation disk 34 is connected to a rotary drive mechanism and is driven to rotate by the rotary drive mechanism. The workstation disk 34 includes a support plate 341 and multiple partitions 342 fixedly connected to the support plate 341. The support plate 341 is located above the discharge plate 35. Multiple material passages 3411 are provided through the support plate 341, and the material passages 3411 are elongated and distributed at intervals around the central axis of the hopper 33. The support plate 341, partitions 342, and inner wall of the hopper 33 enclose multiple material cavities, each of which has a predetermined capacity. The multiple material passages 3411 are arranged one-to-one with the multiple material cavities. After the workstation disk 34 rotates by a predetermined angle, half of the material cavities are connected to the multiple inlets 321, and the other half of the material cavities are connected to the discharge outlet 351 through the material passages 3411.

[0060] The rotary drive mechanism includes a power shaft 371 and a rotary motor (not shown). The power shaft 371 extends vertically and is coaxial with the hopper 33. Part of the power shaft 371 extends downward through the support plate 341 and is connected to the rotary motor via a transmission assembly (not shown). The support plate 341 is fixedly mounted on the power shaft 371. Multiple partitions 342 are arranged in a ring-shaped interval around the power shaft 371. The transmission assembly includes at least a transmission shaft (not shown) extending horizontally. The transmission shaft is located between two of the discharge ports 351 and is connected to the power shaft 371 via gear transmission.

[0061] Thus, the rotary motor drives the power shaft 371 to rotate, which in turn drives the workstation disk 34 to rotate. After the workstation disk 34 rotates by a predetermined angle, the material cavity on the workstation disk 34 can connect with the feed inlet 321 and the discharge outlet 351 to achieve simultaneous feeding and discharging, thereby improving the efficiency of loading and unloading. In addition, the rotary motor is located on one side of the bottom of the hopper 33, so it will not interfere with other components inside the hopper 33, enabling stable loading and unloading.

[0062] As a preferred embodiment, the feed plate 32 has three feed ports 321, and the work station plate 34 includes a support plate 341 and six partitions 342 connected to the support plate 341. The six partitions 342, the support plate 341, and the inner wall of the hopper 33 enclose six material cavities. For ease of understanding, the six material cavities are defined sequentially as the first material cavity 361, the second material cavity 362, the third material cavity 363, the fourth material cavity 364, the fifth material cavity 365, and the sixth material cavity 366. The first material cavity 361 and the second material cavity 362 are adjacent to each other and have the same capacity. The third material cavity 363 and the fourth material cavity 364 are adjacent to each other and have the same capacity. The fifth and sixth material cavities 366 are adjacent to each other and have the same capacity. The first material cavity 361, the third material cavity 363, and the fifth material cavity 365 each have a predetermined capacity. After the work station plate 34 is rotated by a predetermined angle, three of the material cavities are connected to the feed ports 321, and the other three material cavities are connected to the discharge port 351. For example, the first material chamber 361, the third material chamber 363, and the fifth material chamber 365 are connected to the inlet 321, and the second material chamber 362, the fourth material chamber 364, and the sixth material chamber 366 are connected to the outlet 351; or, the first material chamber 361, the third material chamber 363, and the fifth material chamber 365 are connected to the outlet 351, and the second material chamber 362, the fourth material chamber 364, and the sixth material chamber 366 are connected to the inlet 321.

[0063] Thus, when the pre-crushed material is fed into the first material chamber 361, the third material chamber 363, and the fifth material chamber 365 through the feed inlet 321, the pre-crushed material contained in the second material chamber 362, the fourth material chamber 364, and the sixth material chamber 366 can be discharged outwards in three separate streams through the feed outlet 3411 and the discharge outlet 351. Alternatively, when the pre-crushed material is fed into the second material chamber 362, the fourth material chamber 364, and the sixth material chamber 366 through the feed inlet 321, the pre-crushed material contained in the first material chamber 361, the third material chamber 363, and the fifth material chamber 365 can be discharged outwards in three separate streams through the feed outlet 3411 and the discharge outlet 351. Since the volumes of the first material chamber 361, the second material chamber 362, the third material chamber 363, the fourth material chamber 364, the fifth material chamber 365, and the sixth material chamber 366 are preset, the mass of pre-crushed material that each material chamber can hold is basically fixed, and the mass of pre-crushed material delivered to the re-crushing unit 4 is determined, enabling the pre-crushed material to be delivered to the re-crushing unit 4 in a predetermined amount through multiple channels.

[0064] The number of feed streams in the quantitative feeding unit 3 to deliver a predetermined amount of pre-crushed material is related to the precision of the pre-crushing process. When the precision requirement is not high, two streams can be used to deliver pre-crushed material of different qualities. When the crushing speed requirement is high, the pre-crushed material needs to be crushed according to the requirements of coarse, medium, and fine particles. Therefore, the quantitative feeding unit needs to deliver the predetermined amount of pre-crushed material in three streams. It is understood that those skilled in the art can reasonably design the structure of the quantitative feeding unit and the re-crushing unit 4 according to the characteristics of the pre-crushed material and the requirements for pellet strength.

[0065] In this embodiment, the preferred quantitative conveying unit conveys a predetermined amount of pre-crushed material in three separate channels. The re-crushing unit 4 then crushes the pre-crushed material in the three channels to different degrees, forming coarse, medium, and fine particles. The three different particle sizes are then thoroughly mixed. The coarse particles act as aggregates, while the fine particles act as matrix materials. The varying particle sizes facilitate the filling of small particles into the pores between larger particles, resulting in a tight arrangement. This increases the density and strength of the pellets, improves the pelletizing performance of the material, and meets the strength requirements for pelletizing.

[0066] In some embodiments, the surface of the workstation tray 34 is coated with an aluminum oxide ceramic coating. The aluminum oxide ceramic coating has the characteristics of high hardness, strong wear resistance, and low energy consumption. During application, it can withstand high-intensity wear and does not require frequent replacement, thus ensuring the service life of the workstation tray 34.

[0067] The re-crushing unit 4 is located below the quantitative conveying unit and is used to re-crush the pre-crushed material conveyed by the three-way quantitative feeding unit 3 according to the corresponding crushing degree requirements.

[0068] See the attached instruction manual. Figure 2 Appendix Figures 7 to 10 The re-grinding unit 4 includes a grinding cylinder 41, three grinding roller groups 47, and a grinding drive mechanism.

[0069] The crushing cylinder 41 is generally cylindrical in shape. Inside the crushing cylinder 41, there are three crushing chambers 411. The three crushing chambers 411 are distributed at intervals around the central axis of the crushing cylinder 41. Three crushing roller groups 47 are rotatably connected to the three crushing chambers 411 in a corresponding manner. Each crushing roller group 47 includes two crushing rollers connected by gear transmission. The crushing rollers are rotatably connected to the crushing cylinder 41 through bearings. The two crushing rollers cooperate with each other to form a crushing channel. The pre-crushed material falling from the discharge port 351 of the quantitative conveying unit can fall evenly into the crushing channel and be physically squeezed and rubbed by the two crushing rollers of the crushing roller group 47 to achieve secondary crushing.

[0070] Since the outlet 351 of the quantitative feeding unit 3 is elongated and located directly above the crushing channel, it can evenly distribute the material into the crushing channel of the crushing roller group 47, so that the pre-crushed material flows into the crushing channel in a linear shape, achieving uniform feeding, which helps to improve the utilization rate of the crushing roller and reduces the risk of local wear of the crushing roller caused by uneven feeding.

[0071] In this embodiment, the gaps between the three crushing roller groups 47 are gradients, meaning that the crushing intensity of the pre-crushed material by the three crushing roller groups 47 is gradients. This allows the three crushing roller groups 47 to crush the pre-crushed material from the three feed streams to different degrees, resulting in coarse, medium, and fine powder particles, respectively. The coarse powder particles have a particle size of 2–3 mm, the medium powder particles have a particle size of 1–2 mm, and the fine powder particles have a particle size of less than 1 mm.

[0072] One of the crushing roller groups 47 is connected to the crushing drive mechanism, which drives its crushing rollers to rotate. The three crushing roller groups 47 are interconnected, allowing the crushing drive mechanism to drive all three crushing roller groups 47 simultaneously.

[0073] The crushing drive mechanism includes a crushing motor (not shown), the output shaft of which is fitted with a lower pulley, and an upper pulley 441 is fitted on the roller shaft 4712 of a crushing roller. The upper pulley 441 and the lower pulley are connected by a belt drive.

[0074] Thus, the crushing motor can drive the lower pulley to rotate, and the lower pulley and the upper pulley 441 are connected by a belt drive, thereby causing the crushing roller coaxial with the upper pulley 441 to rotate, so as to drive one of the crushing roller groups 47 to rotate.

[0075] See the attached instruction manual. Figures 7 to 9 A mixing cylinder 42 is formed in the middle of the crushing cylinder 41. Each crushing roller group 47 has a crushing roller shaft 4712 extending into the mixing cylinder 42. A first bevel gear 481 is mounted on the crushing roller shaft 4712 extending into the mixing cylinder 42. Three rotating shafts are rotatably connected inside the mixing cylinder 42. The axes of the three rotating shafts extend in the vertical direction. A second bevel gear 482 is mounted on the top of each of the three rotating shafts. The three first bevel gears 481 and the three second bevel gears 482 mesh and drive each other. Pulleys are also mounted on the three rotating shafts. The pulleys of the three rotating shafts are driven by belts.

[0076] Thus, during the rotation of the crushing roller of one of the crushing roller groups 47 driven by the crushing motor, the crushing roller group 47 driven by the crushing motor drives the crushing rollers of the other two crushing roller groups 47 to rotate through the bevel gear pair and belt drive pair, thereby achieving the purpose of driving the operation of three crushing roller groups 47 simultaneously through one crushing drive mechanism.

[0077] Because a single crushing motor can simultaneously drive three crushing roller groups 47 to crush the pre-crushed material to different degrees, manufacturing costs are saved. Furthermore, since only one crushing motor switch is needed to operate all three crushing roller groups 47 simultaneously, the operation method is simplified, and control is more straightforward.

[0078] See the attached instruction manual. Figure 8 and Figure 9 The mixing cylinder 42 includes an upper cavity 421 and a lower cavity 422, which are separated by a partition plate. A first bevel gear 481, a second bevel gear 482, etc., are all disposed within the upper cavity 421. A mixing shaft 491 is rotatably connected within the lower cavity 422. The axis of the mixing shaft 491 is aligned with the central axis of the lower cavity 422. Part of the mixing shaft 491 extends beyond the partition plate and into the upper cavity 421. The mixing shaft 491 is connected to the rotating shaft via a belt drive pair. A mixing blade 492 is also fitted onto the bottom of the mixing shaft 491.

[0079] The crushing chamber 411 is equipped with a guide plate 477, which is located below the crushing channel formed by the crushing roller assembly 47. The guide plate 477 is inclined and extends to the feed inlet of the lower cavity 422. The powder after secondary crushing by the crushing roller assembly 47 will fall directly onto the guide plate 477 under the action of gravity and be guided by the guide plate 477. After exiting the crushing chamber 411, it enters the lower cavity 422 through the feed inlet of the lower cavity 422.

[0080] In this embodiment, while the crushing motor drives the crushing roller assembly 47 to perform the crushing operation, the crushing roller assembly 47 drives the mixing shaft 491 to rotate through the bevel gear pair and belt drive pair. The mixing blades 492 installed on the mixing shaft 491 rotate synchronously and continuously stir the powder after secondary crushing, that is, the coarse, medium and fine particles of the powder are fully mixed, so that the particle size distribution of the material mixture is uniform, thereby ensuring the quality of the steelmaking powder after being pressed into pellets. In addition, since the original crushing motor is further utilized, the utilization rate of the crushing motor is improved and the manufacturing cost is saved. Furthermore, the secondary crushing and mixing processes are both completed inside the crushing cylinder 41, realizing the effective utilization of the internal space of the crushing cylinder 41. The entire device has a compact structure and a more reasonable spatial arrangement.

[0081] See the attached instruction manual. Figure 7 , Figure 10 and Figure 11 In some embodiments, the pulverizing cylinder 41 is also provided with three water storage tanks, which correspond to the first water storage tank 431, the second water storage tank 432 and the third water storage tank 433 respectively. The water storage tanks store cooling media, such as water and refrigerant.

[0082] For easy distinction, the three crushing roller groups 47 respectively include a first crushing roller 471 and a second crushing roller 472, a third crushing roller 473 and a fourth crushing roller 474, a fifth crushing roller 475 and a sixth crushing roller 476 that cooperate with each other. All six crushing rollers include a roller body 4711 and a roller shaft 4712. The roller body 4711 has a hollow rotating structure, and multiple retaining rings 4714 are spaced apart inside it. The multiple retaining rings 4714 are distributed at intervals along the axial direction of the roller body 4711. The retaining rings 4714 have shaft holes for the roller shaft 4712 to pass through. The roller shaft 4712 passes through the retaining rings 4714 and, together with the retaining rings 4714 and the roller body 4711, forms multiple flow guide chambers 4713. The retaining rings 4714 also have water permeable holes that penetrate through them. Two adjacent flow guide chambers 4713 are connected through the water permeable holes.

[0083] The roller 4712 has an opening at one end located outside the crushing cylinder 41, and has a water inlet channel 4715 and a water outlet channel 4716 communicating with the opening. The water inlet channel 4715, the water outlet channel 4716 and the roller 4712 are coaxially arranged. The depth of the water inlet channel 4715 is greater than the depth of the water outlet channel 4716. The water inlet channel 4715 has a circular cross section. The water outlet channel 4716 is located outside the water inlet channel 4715 and has an annular cross section. The water inlet channel 4715 communicates with a guide chamber 4713 away from the inner wall of the crushing cylinder 41, and the water outlet channel 4716 communicates with a guide chamber 4713 close to the inner wall of the crushing cylinder 41.

[0084] One end of the roller shaft 4712 of the first crushing roller 471 and the second crushing roller 472 is rotatably connected to the first guide plate 461. One end of the roller shaft 4712 of the third crushing roller 473 and the fourth crushing roller 474 is rotatably connected to the second guide plate 462. One end of the roller shaft 4712 of the fifth crushing roller 475 and the sixth crushing roller 476 is rotatably connected to the third guide plate 463. The first guide plate 461, the second guide plate 462 and the third guide plate 463 are all fixedly installed on the outside of the crushing cylinder 41. Two water inlet connectors 4611 and two water outlet connectors 4612 are formed on the first guide plate 461, the second guide plate 462 and the third guide plate 463.

[0085] The outlets of the two inlet connectors 4611 of the first diversion plate 461 are respectively connected to the inlet channels 4715 of the first crushing roller 471 and the second crushing roller 472. The inlets of the two outlet connectors 4612 of the first diversion plate 461 are respectively connected to the outlet channels 4716 of the first crushing roller 471 and the second crushing roller 472. The inlet of one of the inlet connectors 4611 of the first diversion plate 461 is also connected to the outlet of one of the outlet connectors 4612, so that the outlet channel 4716 of the first crushing roller 471 is connected to the inlet channel 4715 of the second crushing roller 472. The inlet of the other inlet connector 4611 of the first diversion plate 461 is connected to the outlet of the first water storage tank 431. The outlet of the other outlet connector 4612 of the first diversion plate 461 is connected to the inlet of the second water storage tank 432.

[0086] The outlets of the two inlet connectors 4611 of the second diversion plate 462 are respectively connected to the inlet channels 4715 of the third crushing roller 473 and the fourth crushing roller 474. The inlets of the two outlet connectors 4612 of the second diversion plate 462 are respectively connected to the outlet channels 4716 of the third crushing roller 473 and the fourth crushing roller 474. The inlet of one of the inlet connectors 4611 of the second diversion plate 462 is also connected to the outlet of one of the outlet connectors 4612, so that the outlet channel 4716 of the third crushing roller 473 is connected to the inlet channel 4715 of the fourth crushing roller 474. The inlet of the other inlet connector 4611 of the second diversion plate 462 is connected to the outlet of the second water storage tank 432. The outlet of the other outlet connector 4612 of the second diversion plate 462 is connected to the inlet of the third water storage tank 433.

[0087] The outlets of the two inlet connectors 4611 of the third diversion plate 463 are respectively connected to the inlet channels 4715 of the fifth crushing roller 475 and the sixth crushing roller 476. The inlets of the two outlet connectors 4612 of the third diversion plate 463 are respectively connected to the outlet channels 4716 of the fifth crushing roller 475 and the sixth crushing roller 476. The inlet of one of the inlet connectors 4611 of the third diversion plate 463 is also connected to the outlet of one of the outlet connectors 4612, so that the outlet channel 4716 of the fifth crushing roller 475 is connected to the inlet channel 4715 of the sixth crushing roller 476. The inlet of the other inlet connector 4611 of the third diversion plate 463 is connected to the outlet of the third water storage tank 433. The outlet of the other outlet connector 4612 of the third diversion plate 463 is connected to the inlet of the first water storage tank 431.

[0088] A circulation pump is installed on the pipeline between the first water storage tank 431 and the first diversion plate 461.

[0089] Thus, the circulating pump circulates the cooling medium within the three crushing roller groups 47 and the three water storage tanks. This circulation absorbs the heat generated during the operation of the crushing roller groups, reducing their temperature rise and allowing for stable operation over extended periods. Furthermore, the three water storage tanks are positioned between adjacent crushing roller groups 47. The cooling medium flowing from one crushing roller group 47 is first cooled in a water storage tank before entering another. Because the cooling medium is pre-cooled before entering the crushing roller group 47, the cooling effect on the three crushing roller groups 47 is more uniform, resulting in a more even temperature distribution within the crushing cylinder 41 and preventing localized overheating. Moreover, the alternating arrangement of the crushing roller groups 47 and water storage tanks within the crushing cylinder 41 fully utilizes the internal space, resulting in a compact structure and a rational spatial layout for the entire device.

[0090] In some embodiments, one end of the roller shaft 4712 of both the first crushing roller 471 and the second crushing roller 472 extends outward to form a sealing part 4717. The sealing part 4717 has a water passage communicating with the water outlet channel 4716, and the water outlet connector 4612 communicates with the water outlet channel 4716. A first annular sealing groove is formed on the end face of the sealing part 4717. The first sealing groove is located outside the water inlet channel 4715, and the central axis of the first sealing groove is on the same straight line as the axis of the roller shaft 4712. A second annular sealing groove is formed on the first guide plate 461. The first sealing groove and the second sealing groove cooperate to form a first sealing cavity. A first sealing element 483 is sealed and accommodated in the first sealing cavity. The first sealing element 483 isolates the water inlet channel 4715 and the water outlet channel 4716, thereby achieving the first seal and preventing the cooling medium in the water inlet channel 4715 from seeping into the water outlet channel 4716.

[0091] The sealing part 4717 is also provided with a third sealing groove in the shape of a ring. The third sealing groove is located outside the water outlet channel 4716. The central axis of the third sealing groove is on the same straight line as the axis of the roller 4712. The first guide plate 461 is provided with a fourth sealing groove in the shape of a ring. The third sealing groove and the fourth sealing groove cooperate to form a second sealing cavity. The second sealing cavity contains a second sealing element 484 in a sealed manner. The second sealing element 484 isolates the water outlet channel 4716 from the external environment, realizing a second seal and preventing the cooling medium in the water outlet channel 4716 from seeping outward.

[0092] The first seal 483 and the second seal 484 are identical in shape, differing only in size, with the first seal 483 being smaller than the second seal 484. Both the first seal 483 and the second seal 484 include a sealing ring 4831 and a rubber ring 4832. The rubber ring 4832 has a circular cross-section and is placed within the first sealing groove and the third sealing groove. The sealing ring 4831 is placed between the rubber ring 4832 and the drainage plate. The end face of the sealing ring 4831 is flat, meaning the contact surface between the sealing ring 4831 and the drainage plate is flat.

[0093] The sealing ring 4831 can be made of nitrile rubber, polyurethane rubber, or fluororubber. The rubber ring 4832 can be made of highly elastic materials such as polyurethane rubber, which, while meeting the sealing performance requirements, also have a long service life and high reliability.

[0094] A static sealing surface is formed between the rubber ring 4832 of the first sealing element 483 and the roller shaft 4712, and between the rubber ring 4832 of the second sealing element 484 and the roller shaft 4712, preventing the cooling medium from leaking out through the water inlet channel 4715 or the water outlet channel 4716. The first sealing element 483 and the second sealing element 484 rotate together with the roller shaft 4712, that is, the first sealing element 483 and the second sealing element 484 remain relatively stationary with the roller shaft 4712. The dynamic friction surface is generated on the contact surface between the sealing ring 4831 and the guide plate, and a dynamic sealing surface is formed between the sealing ring 4831 and the guide plate to prevent the cooling medium from penetrating outward. When the end face of the sealing ring 4831 wears, the compressed rubber ring 4832 can compensate for the gap generated by friction through elastic deformation, ensuring the fit and playing a good sealing role.

[0095] In some embodiments, a fifth sealing groove is formed on the outer periphery of the sealing part 4717, and a sixth sealing groove is formed on the guide plate. The fifth and sixth sealing grooves cooperate to form a third sealing cavity, which tightly houses a third sealing element 485. By using the third sealing element 485 as the outermost seal, even if the first sealing element 483 and the second sealing element 484 fail, a sealing effect can still be achieved, effectively preventing the cooling medium from seeping outwards. The material of the third sealing element 485 can be referenced to the materials of the first sealing element 483 and the second sealing element 484, and will not be described further here.

[0096] It is understood that the sealing structures between the third crushing roller 473 and the fourth crushing roller 474 and the second guide plate 462, and between the fifth crushing roller 475 and the sixth crushing roller 476 and the third guide plate 463, all employ the sealing structures found between the first crushing roller 471 and the second crushing roller 472 and the first guide plate 461, to achieve effective sealing of the cooling medium. For the sake of brevity, the sealing structures between the third crushing roller 473 and the fourth crushing roller 474 and the second guide plate 462, and between the fifth crushing roller 475 and the sixth crushing roller 476 and the third guide plate 463, will not be described in detail here.

[0097] The pelletizing unit is used to press the powder after secondary crushing in the re-crushing unit 4 into pellets.

[0098] See the attached instruction manual. Figure 1 and Figure 13 The pelletizing unit includes a feeding device 5 and a forming device 6 arranged sequentially according to the process flow.

[0099] The feeding device 5 includes a conveying mechanism and a feeding mechanism. The conveying mechanism is used to convey the material mixture in a horizontal direction. The conveying mechanism has a first material cylinder 51 extending laterally, with a feed inlet at the top of the first material cylinder 51. The feed inlet of the first material cylinder 51 is located below the discharge outlet of the mixing cylinder 42. A conveying screw 53 extending axially along the first material cylinder 51 is provided inside the first material cylinder 51. The conveying mechanism also has a second material cylinder 52 extending vertically, located at the discharge end of the first material cylinder 51 and connected to the first material cylinder 51. A feeding screw 54 extending axially along the second material cylinder 52 is provided inside the second material cylinder 52. A drive device, such as a motor, is connected to the end sides of the conveying screw 53 and the feeding screw 54 to rotate the conveying screw 53 and the feeding screw 54, thereby realizing the functions of replenishing materials and quantitative feeding. It should be noted that, for ease of description, "lateral" in this application refers to a horizontal direction, "longitudinal" refers to a horizontal direction perpendicular to the lateral direction, and "vertical" refers to a vertical direction perpendicular to the lateral direction.

[0100] The forming unit has parallel longitudinally arranged rollers, namely a left forming roller 61 and a right forming roller 62. The left forming roller 61 and the right forming roller 62 are connected by a transmission gear, so that they rotate at the same speed but in opposite directions. The outer circumference of the left forming roller 61 and the right forming roller 62 extends inward to form a hemispherical forming groove. The forming grooves on the left forming roller 61 and the right forming roller 62 correspond one-to-one and can cooperate to form a spherical groove. The left forming roller 61 and the right forming roller 62 cooperate to physically extrude and rub the material mixture, so that the powder is physically extruded and formed in the spherical groove to form pellets, thus obtaining the finished pellet product.

[0101] In summary, the steelmaking powder pelletizing device proposed in this invention pre-crushes solid wastes such as steel slag, lime, waste aluminum, and waste silicon in a pre-crushing unit 1 to obtain pre-crushed material. This pre-crushed material is then discharged from the pre-crushing unit 1 and lifted upwards to a quantitative feeding unit 3 via a screw conveyor 2 or a pump. From the quantitative feeding unit 3, the pre-crushed material is intermittently fed to a re-crushing unit 4 through multiple channels. The re-crushing unit 4 further crushes the pre-crushed material from the three channels to different degrees, forming coarse, medium, and fine particles. These three different particle sizes are then thoroughly mixed to obtain a powder mixture. Finally, the pelletizing unit presses this powder mixture to form finished pellets. This process achieves pelletizing of steelmaking powder with tight process connections and a high degree of automation, making it particularly suitable for continuous factory processing. Furthermore, the pelletized steel balls have a compact structure, increased density and strength, and improved pelletizing performance, meeting the strength requirements for pelletizing.

[0102] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for pressing steelmaking powder into pellets, characterized in that, This includes a pre-crushing unit, a quantitative feeding unit, a re-crushing unit, and a pelletizing unit, arranged sequentially according to the process flow, wherein: The pre-crushing unit is used to pre-crush the pre-crushed material to obtain the pre-crushed material; The quantitative feeding unit is used to intermittently feed pre-crushed material to the re-crushing unit in three separate streams; The re-grinding unit includes a grinding cylinder with three grinding chambers. Each of the three grinding chambers receives pre-grinding material conveyed by a quantitative conveying unit. Each of the three grinding chambers is equipped with a grinding roller assembly with a gradient in the gap between the rollers, used to grind the pre-grinding material to a predetermined degree, forming coarse, medium, and fine powder particles respectively. A mixing cylinder is also provided in the middle of the grinding cylinder. The inner cavity of the mixing cylinder is connected to the grinding chamber. A guide plate is provided in the grinding chamber. The guide plate is inclined and located below the grinding roller assembly, with its lower end extending into the mixing cylinder. A stirring blade is provided in the mixing cylinder. The stirring blade is used to stir the coarse, medium, and fine powder particles to obtain a powder mixture. The pelletizing unit is used to press the powder mixture into pellets. The crushing roller assembly includes cooperating crushing rollers. Each crushing roller includes a roller body and a roller shaft. Multiple retaining rings are spaced apart within the roller body, distributed axially along the roller body. The roller shaft, retaining rings, and roller body enclose multiple flow guide chambers. Water permeable holes are also provided through the retaining rings, and adjacent flow guide chambers are connected through these holes. The roller shaft has an opening at one end located outside the crushing cylinder, and has an inlet channel and an outlet channel communicating with the opening. The inlet channel and outlet channel are coaxially arranged with the roller shaft. The depth of the inlet channel is greater than the depth of the outlet channel. The inlet channel has a circular cross-section. The outlet channel is located outside the inlet channel and has an annular cross-section. The inlet channel communicates with the flow guide chambers away from the inner wall of the crushing cylinder, and the outlet channel communicates with the flow guide chambers close to the inner wall of the crushing cylinder. Both crushing rollers of the crushing roller assembly are rotatably connected to a guide plate. The guide plate has two inlet connectors and an outlet connector. One end of the roller shaft extends outward to form a sealing part. A water passage communicating with the outlet channel is opened on the sealing part. The outlets of the two inlet connectors are respectively connected to the two inlet channels of the crushing roller assembly, and the inlets of the two outlet connectors are respectively connected to the two outlet channels of the crushing roller assembly. The inlet of one inlet connector is connected to the outlet of one outlet connector, so that the outlet channel of one crushing roller is connected to the inlet channel of the other crushing roller. The inlet of the other inlet connector is connected to the outlet of the water storage tank through a pipe, and the outlet of the other outlet connector is connected to the inlet of another water storage tank through a pipe. The cooling medium in the three crushing roller groups is circulated by a circulating pump.

2. The steelmaking powder pelletizing device according to claim 1, characterized in that: The quantitative feeding unit includes a hopper and a silo that are interconnected. A feeding plate is provided at the connection between the hopper and the silo, and the feeding plate has multiple feeding ports. A discharge plate is fixedly installed at the bottom of the silo, and the discharge plate has multiple elongated discharge ports. The number of discharge ports is the same as the number of feeding ports. A station plate is rotatably connected inside the silo. The station plate is connected to a rotary drive mechanism and is driven to rotate by the rotary drive mechanism. Two material cavity groups are formed on the station plate. Each material cavity group includes material cavities with the same number of feeding ports and a predetermined capacity. After the station plate rotates a predetermined angle, multiple material cavities in one material cavity group are respectively connected to the feeding ports of multiple silos, and multiple material cavities in the other material cavity group are respectively connected to the discharge ports of the silos.

3. The steelmaking powder pelletizing device according to claim 2, characterized in that: The workstation includes a support plate and six partitions connected to the support plate. The support plate is located above the discharge plate. Six material passages are formed through the support plate. The six partitions, the support plate, and the inner wall of the hopper form a first material cavity, a second material cavity, a third material cavity, a fourth material cavity, a fifth material cavity, and a sixth material cavity. The first and second material cavities are adjacent to each other and have the same capacity. The third and fourth material cavities are adjacent to each other and have the same capacity. The fifth and sixth material cavities are adjacent to each other and have the same capacity. After the workstation rotates by a predetermined angle, the first, third, and fifth material cavities are connected to the inlet of the hopper, and the second, fourth, and sixth material cavities are connected to the outlet of the hopper. Alternatively, the first, third, and fifth material cavities are connected to the outlet of the hopper, and the second, fourth, and sixth material cavities are connected to the inlet of the hopper.

4. The steelmaking powder pelletizing apparatus according to claim 3, characterized in that: The discharge port and the feed port of the hopper are both elongated. After the work station plate rotates to a predetermined angle, three of the feed holes are connected to the discharge ports of the three hoppers one by one. The length direction of the discharge port is consistent with the axial direction of the crushing roller group.

5. The steelmaking powder pelletizing device according to claim 1, characterized in that: Each set of crushing rollers has a crushing roller shaft extending into the mixing cylinder. A first bevel gear is mounted on the crushing roller shaft extending into the mixing cylinder. Three rotating shafts are rotatably connected inside the mixing cylinder. The axes of the three rotating shafts extend vertically, and a second bevel gear is mounted on the top of each of the three rotating shafts. The three first bevel gears and the three second bevel gears mesh and drive each other. Pulleys are also mounted on the three rotating shafts, and the pulleys of the three rotating shafts are driven by belts. The crushing roller shaft is driven to rotate by a crushing motor.

6. The steelmaking powder pelletizing apparatus according to claim 5, characterized in that: The mixing cylinder includes an upper cavity and a lower cavity, which are separated by a partition plate. The first bevel gear and the second bevel gear are both located in the upper cavity. A mixing shaft is rotatably connected in the lower cavity. Part of the mixing shaft extends out of the partition plate and into the upper cavity. The mixing shaft is connected to the rotating shaft by a belt drive pair. Mixing blades are also fitted at the bottom of the mixing shaft.

7. The steelmaking powder pelletizing apparatus according to claim 1, characterized in that: The sealing part and the diversion plate are sealed together to house a first sealing element and a second sealing element. The first sealing element is located outside the water inlet channel, and the second sealing element is located outside the water outlet channel. Both the first sealing element and the second sealing element include a sealing ring and a rubber ring. The rubber ring is placed between the sealing part and the sealing ring. The sealing ring is squeezed between the rubber ring and the diversion plate. The sealing ring has a plane that contacts the diversion plate.

8. The steelmaking powder pelletizing apparatus according to claim 1, characterized in that: A fifth sealing groove is provided on the outer periphery of the sealing part, and a sixth sealing groove is provided on the diversion plate. The fifth sealing groove and the sixth sealing groove cooperate to form a third sealing cavity, and a third sealing element is sealed and accommodated in the third sealing cavity.

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