Raw material pretreatment equipment for preparing refractory nozzle

Abstract

The invention discloses raw material pretreatment equipment for preparing a refractory water gap, and belongs to the technical field of refractory material preparation, and the technical key points are that the raw material pretreatment equipment comprises a support frame, a first pretreatment mechanism is arranged in a raw material crushing link, and a first crushing roller and a second crushing roller are arranged to efficiently crush large raw materials; under the vibration auxiliary effect of the vibration machine, the qualified rate of the raw material granularity in the follow-up process is improved, the grinding granularity can be more uniform through the arranged second pretreatment mechanism by adopting the grinding treatment mode of one-by-one intermittent feeding on the two sides, over-grinding and under-grinding are reduced, it is guaranteed that a grinding medium makes full contact with the materials, and the grinding efficiency is improved. And meanwhile, through uniform distribution and smooth flowing of the materials, heat is dispersed and transferred along with the materials, material performance degradation caused by too high temperature is effectively avoided, the service life of equipment is prolonged, and the beneficial effect of being good in pretreatment effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of refractory material preparation, in particular to raw material pretreatment equipment for preparing refractory nozzles. Background Art

[0002] In the field of refractory materials, refractory nozzles are key components in the continuous casting process, and their quality directly affects the casting effect of molten steel and the quality of the ingots. With the growing demand for high-quality steel in the steel industry, the performance requirements for refractory nozzles have become increasingly stringent, making the optimization of refractory nozzle preparation technology a key to the development of the industry. In the preparation process of refractory nozzles, the raw material pretreatment link occupies a pivotal position. High-quality refractory nozzles must have good corrosion resistance, thermal stability, and high strength. These properties largely depend on the quality and characteristics of the initial raw materials. Raw material pretreatment aims to process and treat the original materials through a series of physical or chemical means to meet the requirements of subsequent forming, sintering and other processes for raw material particle size, purity, activity, etc., thereby laying a solid foundation for the preparation of high-performance refractory nozzles.

[0003] Currently, in the pretreatment of raw materials for the preparation of refractory nozzles, conventional crushing equipment crushes the raw materials and then performs corresponding screening treatment. The screened raw materials are then fed into a grinder for grinding treatment to initially reduce the size of the raw material particles for subsequent further processing. However, the particle shape and particle size distribution of the raw materials after pretreatment are not ideal, which may affect the uniformity of subsequent raw material mixing, resulting in poor applicability and failure to meet actual use requirements.

[0004] Therefore, it is necessary to provide a raw material pretreatment device for preparing a refractory nozzle, aiming to solve the above problems. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the embodiments of the present invention is to provide a raw material pretreatment device for preparing a refractory nozzle, aiming to solve the technical problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A raw material pretreatment device for preparing a refractory nozzle comprises a support frame, a conveyor is mounted on the support frame, a lower processing seat is mounted on the conveyor, an upper processing seat is connected to the lower processing seat, and further comprises: A first pre-processing mechanism is installed at the connection between the upper processing seat and the lower processing seat, and is used for crushing, screening and conveying the incoming raw materials. The first pre-processing mechanism includes a movable screen plate for movable screening and a first conveying seat for conveying connection. The movable screen plate is movably installed on the upper processing seat. A dividing cone for dividing the materials is provided below the movable screen plate. A vibrator is provided on one side of the upper processing seat; The second pretreatment mechanism is installed inside the lower processing seat and is used for reciprocating grinding of the screened raw materials and feeding control on both sides. The second pretreatment mechanism includes a push plate for grinding and feeding control, a first cylindrical slider, a second cylindrical slider and a traction rod. The push plate is adapted to be rotatably installed at the junction of the first cylindrical slider and the second cylindrical slider. The first cylindrical slider and the second cylindrical slider are both rotatably connected to the second fixed plate. The second fixed plate is fixedly installed on the traction rod, and a grinding plate for grinding is provided on one side of the push plate.

[0007] As a further solution of the present invention, the second pretreatment mechanism also includes a docking plate and a fifth connecting shaft for driving the grinding disc to perform reciprocating grinding. The center of the push disc is fixedly connected to the third connecting shaft, and the third connecting shaft is rotatably mounted on the docking plate through the fourth connecting shaft. The docking plate is fixedly mounted on the fifth connecting shaft, and the fifth connecting shaft is rotatably mounted on the first fixed plate. The first fixed plate is fixedly mounted inside the lower processing seat.

[0008] As a further solution of the present invention, the second pretreatment mechanism also includes a grinding support plate for adapting to the grinding disc for grinding, the grinding support plate is fixedly installed inside the lower processing seat, side guide blocks are provided on both sides of the grinding support plate, and a blanking plate for blanking is provided in the middle of the grinding support plate, and one side of the blanking plate is rotatably installed on the grinding support plate through a rotating shaft.

[0009] As a further solution of the present invention, the second pretreatment mechanism also includes a positioning plate for material unloading control, the positioning plate is rotatably installed on one side of the unloading plate, and the positioning plate is eccentrically rotatably installed on the third fixed plate through a sixth connecting shaft, the sixth connecting shaft is fixedly connected to the output shaft of the fourth motor, and the fourth motor is fixedly installed on the bottom of the grinding support plate.

[0010] As a further solution of the present invention, the second pretreatment mechanism also includes a third motor for driving the fifth connecting shaft to rotate and control, the fifth connecting shaft is rotatably connected to the output shaft of the third motor through a synchronous belt, and the third motor is fixedly mounted on the first fixed plate through a motor mounting plate.

[0011] As a further solution of the present invention, the second pretreatment mechanism also includes a toothed plate for unloading drive control and a first one-way valve and a second one-way valve. The traction rod is slidingly connected to the first fixed plate through a limiting slide, and the two ends of the traction rod are fixedly connected to the toothed plate through a traction plate. The toothed plate is meshed with a first gear and a second gear. The first gear is fixedly connected to the first connecting shaft, and the first connecting shaft is installed at one end of the second feed shaft through the first one-way valve. The second gear is fixedly connected to the second connecting shaft, and the second connecting shaft is installed at one end of the second feed shaft on the other side through the second one-way valve.

[0012] As a further solution of the present invention, a second auger blade is provided on the second feed shaft, and the second feed shaft is rotatably installed inside the second feed seat, the second feed seat is fixedly installed inside the lower processing seat, and the bottom of the second feed seat is fixedly connected to a discharge pipe, and the discharge pipe is arranged toward the grinding support plate, and the second feed seat is connected to the interior of the first feed seat through a second guide pipe.

[0013] As a further solution of the present invention, the first pretreatment mechanism also includes a first crushing roller and a second crushing roller for crushing, the first crushing roller and the second crushing roller are both rotatably installed inside the upper processing seat, and the first crushing roller and the second crushing roller are rotatably connected through a gear pair, the second crushing roller is fixedly connected to the output shaft of the first motor, the first motor is fixedly installed on the outside of the upper processing seat, a guide hopper is provided on the upper processing seat, a guide plate for guiding material is provided on the upper side of the first crushing roller and the second crushing roller, the guide plate is fixedly installed on the inner wall of the guide hopper, a material discharge cavity is opened below the movable screen plate, the material dividing cone is arranged in the middle of the material discharge cavity, and the material discharge cavity is connected to the interior of the first material delivery seat through the first material guide pipe.

[0014] As a further solution of the present invention, the first pretreatment mechanism also includes a first auger blade for feeding materials, and the first auger blade is rotatably installed inside the first feeding seat through the first feeding shaft. A worm gear is fixedly connected to the first feeding shaft, and a worm is meshedly connected to the worm gear. The worm is rotatably installed inside the first feeding seat, and the worm is fixedly connected to the output shaft of the second motor, and the second motor is fixedly installed on the outside of the first feeding seat.

[0015] As a further solution of the present invention, the conveyor is provided with a conveyor belt for transmission, the conveyor belt is provided with a plurality of conveying partitions for separating the raw materials, and a partition avoidance groove for avoiding the conveying partitions is provided below the lower processing seat.

[0016] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: The present invention sets a first pretreatment mechanism in the raw material crushing link. The setting of the first crushing roller and the second crushing roller can efficiently crush large pieces of raw materials, reducing the difficulty of subsequent processing. The crushed raw materials fall onto the movable screen plate below for screening. With the auxiliary vibration of the vibrator, the qualified rate of the raw material particle size entering the subsequent process is improved, and the movable screen plate adopts a detachable design, which provides great convenience for the maintenance and adjustment of the equipment. In addition, the detachable design facilitates regular cleaning of raw material residues attached to the movable screen plate to prevent clogging of the screen holes. The qualified raw materials that have been screened will fall onto the dividing cone. The conical structure of the dividing cone can divert the raw materials to the first feed seat for subsequent transportation, ensuring the smoothness of the feeding process, thereby helping to improve the uniformity of the subsequent refractory nozzle raw material mixing.

[0017] The second pre-treatment mechanism adopts a grinding method of intermittent feeding on both sides to make the grinding particle size more uniform and reduce "over-grinding" and "under-grinding". The intermittent feeding on both sides alternately adds materials from both ends. While grinding repeatedly, it can simultaneously drive the material to form a "symmetrical flow" in the grinding chamber, avoiding local accumulation, making the grinding medium act on the material more uniformly, and keeping the material concentration in the grinding chamber within a reasonable range. Improve grinding efficiency and reduce unit energy consumption. Through intermittent feeding on both sides and "batch and alternating" feeding, the amount of material in the grinding chamber can always be maintained in a "dynamic balance" state, ensuring full contact between the grinding media and the material while avoiding the buffering effect of excessive material. In addition, the flow of materials on both sides will drive the grinding media to form a "bidirectional circulation motion", increasing the collision frequency between the media and the material, and improving the effective crushing work per unit time, thereby improving the grinding efficiency; The equipment wears more evenly and extends its service life. Intermittent feeding on both sides makes the material evenly distributed in the grinding chamber. The movement trajectory of the grinding medium is more symmetrical, and the impact and friction are dispersed throughout the entire chamber. The wear rates of the liner and the medium tend to be consistent. Moreover, through the uniform distribution and smooth flow of the material, the heat is dispersed and transferred with the material, effectively avoiding the degradation of material properties caused by excessive temperature, thereby extending the service life of the equipment.

[0018] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of an embodiment of the invention.

[0020] Figure 2 It is a side structural schematic diagram of an embodiment of the invention.

[0021] Figure 3 It is a schematic diagram of the structure inside the upper processing seat in an embodiment of the invention.

[0022] Figure 4 It is a schematic diagram of the structure inside the lower processing seat in an embodiment of the invention.

[0023] Figure 5 This is a schematic diagram of the structure inside the first material feeding seat in an embodiment of the invention.

[0024] Figure 6 This is a schematic diagram of the structure inside the second material feeding seat in an embodiment of the invention.

[0025] Figure 7 Schematic diagram of the connection structure of the push disk in an embodiment of the invention.

[0026] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of A in the middle.

[0027] Figure 9 It is a schematic diagram of the connection structure of the blanking plate in an embodiment of the invention.

[0028] Figure numerals: 1, support frame; 2, conveyor; 3, conveyor belt; 4, conveying partition; 5, lower processing seat; 6, partition avoidance groove; 7, upper processing seat; 8, guide hopper; 9, guide plate; 10, first crushing roller; 11, second crushing roller; 12, gear pair; 13, first motor; 14, vibrator; 15, movable screen plate; 16, discharge chamber; 17, material dividing cone; 18, first guide pipe; 19, first feed seat; 20, second motor; 21, worm; 22, worm gear; 23, first feed shaft; 24, first auger blade; 25, second guide pipe; 26, second feed seat; 27, discharge pipe; 28, second feed shaft; 29, second auger blade; 30, first one-way valve; 3 1. Second one-way valve; 32. First connecting shaft; 33. First gear; 34. Second connecting shaft; 35. Second gear; 36. Tooth plate; 37. Pull plate; 38. Pull rod; 39. Limit slide plate; 40. First fixed plate; 41. Second fixed plate; 42. First cylindrical slider; 43. Second cylindrical slider; 44. Push plate; 45. Third connecting shaft; 46. Grinding plate; 47. Docking plate; 48. Fourth connecting shaft; 49. Fifth connecting shaft; 50. Synchronous belt; 51. Third motor; 52. Motor mounting plate; 53. Grinding support plate; 54. Side guide block; 55. Blanking plate; 56. Positioning plate; 57. Sixth connecting shaft; 58. Third fixed plate; 59. Fourth motor. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0031] See also Figures 1 to 6 A raw material pretreatment device for preparing a refractory nozzle includes a support frame 1, a conveyor 2 is installed on the support frame 1, a lower processing seat 5 is installed on the conveyor 2, and the lower processing seat 5 is connected to the upper processing seat 7, and further includes: The first pretreatment mechanism is installed at the connection between the upper processing seat 7 and the lower processing seat 5, and is used for crushing, screening and conveying the incoming raw materials. The first pretreatment mechanism includes a movable screen plate 15 for movable screening and a first material conveying seat 19 for material conveying connection. The movable screen plate 15 is movably installed on the upper processing seat 7. A dividing cone 17 for dividing the material is provided below the movable screen plate 15, and a vibrator 14 is provided on one side of the upper processing seat 7.

[0032] Furthermore, the first pretreatment mechanism also includes a first crushing roller 10 and a second crushing roller 11 for crushing. The first crushing roller 10 and the second crushing roller 11 are both rotatably installed inside the upper processing seat 7, and the first crushing roller 10 and the second crushing roller 11 are rotatably connected through a gear pair 12. The second crushing roller 11 is fixedly connected to the output shaft of the first motor 13. The first motor 13 is fixedly installed on the outer side of the upper processing seat 7. A guide hopper 8 is provided on the upper processing seat 7. A guide plate 9 for guiding material is provided on the upper side of the first crushing roller 10 and the second crushing roller 11. The guide plate 9 is fixedly installed on the inner wall of the guide hopper 8. A discharge cavity 16 is opened below the movable screen plate 15. A dividing cone 17 is arranged in the middle of the discharge cavity 16. The discharge cavity 16 is connected to the interior of the first feed seat 19 through a first guide pipe 18.

[0033] Furthermore, the first pretreatment mechanism also includes a first auger blade 24 for feeding, and the first auger blade 24 is rotatably installed inside the first feed seat 19 through the first feed shaft 23. A worm gear 22 is fixedly connected to the first feed shaft 23, and a worm 21 is meshedly connected to the worm gear 22. The worm 21 is rotatably installed inside the first feed seat 19, and the worm 21 is fixedly connected to the output shaft of the second motor 20. The second motor 20 is fixedly installed on the outside of the first feed seat 19.

[0034] Preferably, when preparing the refractory nozzle material, the raw material is placed on the upper processing seat 7, and the raw material enters the first crushing roller 10 and the second crushing roller 11 under the guidance of the guide plate 9. The output shaft of the first motor 13 drives the second crushing roller 11 to rotate, and drives the first crushing roller 10 and the second crushing roller 11 to rotate in opposite directions under the connection relationship of the gear pair 12, thereby facilitating the crushing processing of the incoming raw material.

[0035] The movable screen plate 15 below the first crushing roller 10 and the second crushing roller 11 is used for screening processing, and a vibrator 14 is provided on the outer side of the upper processing seat 7, thereby further improving the screening efficiency of the movable screen plate 15, and the movable screen plate 15 can be taken out through the external handle, thereby facilitating the cleaning of the movable screen plate 15. In addition, the raw materials screened by the movable screen plate 15 can be divided and processed through the dividing cone 17, and enter the interior of the first feed seat 19 through the first guide pipe 18. At this time, the output shaft of the second motor 20 drives the worm 21 to rotate, and drives the first auger blade 24 on the first feed shaft 23 to rotate under the relationship of meshing connection between the worm 21 and the worm gear 22, thereby facilitating the raw materials entering the first feed seat 19 to be transported to the interior of the second feed seat 26 through the second guide pipe 25.

[0036] In the raw material crushing link, the setting of the first crushing roller 10 and the second crushing roller 11 can efficiently crush large pieces of raw materials, lay a uniform raw material foundation for the subsequent screening process, and reduce the difficulty of subsequent processing. The crushed raw materials fall onto the movable screen plate 15 below for screening. With the vibration assistance of the vibrator 14, the particle size qualification rate of the raw materials entering the subsequent process is improved, and the movable screen plate 15 adopts a detachable design, which provides great convenience for the maintenance and adjustment of the equipment. When it is necessary to process raw materials with different particle size requirements, the sieve plate with the corresponding sieve hole size can be quickly replaced without the need for complex modification of the main structure of the equipment, which significantly enhances the versatility and flexibility of the equipment. In addition, the detachable design facilitates regular cleaning of raw material residues attached to the movable screen plate 15 to prevent clogging of the sieve holes. The qualified raw materials after screening will fall onto the dividing cone 17. The conical structure of the dividing cone 17 can divert the raw materials to the first feed seat 19 for subsequent transportation, ensuring the smoothness of the feeding process, thereby helping to improve the uniformity of the subsequent refractory nozzle raw material mixing.

[0037] like Figures 1 to 9 As shown, based on the above embodiments, this embodiment further includes a second pretreatment mechanism, which is installed inside the lower processing seat 5 and is used for reciprocating grinding of the screened raw materials and feeding control on both sides. The second pretreatment mechanism includes a push plate 44 for grinding and feeding control, a first cylindrical slider 42, a second cylindrical slider 43 and a traction rod 38. The push plate 44 is adapted to be rotatably installed at the junction of the first cylindrical slider 42 and the second cylindrical slider 43. The first cylindrical slider 42 and the second cylindrical slider 43 are both rotatably connected to the second fixed plate 41. The second fixed plate 41 is fixedly installed on the traction rod 38, and a grinding plate 46 for grinding is provided on one side of the push plate 44.

[0038] Furthermore, the second pretreatment mechanism also includes a docking plate 47 and a fifth connecting shaft 49 for driving the grinding disc 46 to perform reciprocating grinding. The center of the push disc 44 is fixedly connected to the third connecting shaft 45, and the third connecting shaft 45 is rotatably mounted on the docking plate 47 through the fourth connecting shaft 48. The docking plate 47 is fixedly mounted on the fifth connecting shaft 49, and the fifth connecting shaft 49 is rotatably mounted on the first fixed plate 40. The first fixed plate 40 is fixedly mounted inside the lower processing seat 5.

[0039] Furthermore, the second pretreatment mechanism also includes a grinding support plate 53 for adapting to the grinding disc 46 for grinding. The grinding support plate 53 is fixedly installed inside the lower processing seat 5. Side guide blocks 54 are provided on both sides of the grinding support plate 53. A blanking plate 55 for blanking is provided in the middle of the grinding support plate 53. One side of the blanking plate 55 is rotatably installed on the grinding support plate 53 through a rotating shaft.

[0040] Furthermore, the second pretreatment mechanism also includes a positioning plate 56 for material unloading control. The positioning plate 56 is rotatably installed on one side of the unloading plate 55, and the positioning plate 56 is eccentrically installed on the third fixed plate 58 through the sixth connecting shaft 57. The sixth connecting shaft 57 is fixedly connected to the output shaft of the fourth motor 59, and the fourth motor 59 is fixedly installed on the bottom of the grinding support plate 53.

[0041] Furthermore, the second pretreatment mechanism also includes a third motor 51 for driving the fifth connecting shaft 49 to rotate and control the fifth connecting shaft 49. The fifth connecting shaft 49 is rotatably connected to the output shaft of the third motor 51 through a synchronous belt 50. The third motor 51 is fixedly mounted on the first fixed plate 40 through a motor mounting plate 52.

[0042] Furthermore, the second pretreatment mechanism also includes a tooth plate 36 for unloading drive control and a first one-way valve 30 and a second one-way valve 31. The traction rod 38 is slidingly connected to the first fixed plate 40 through a limiting slide 39. The two ends of the traction rod 38 are fixedly connected to the tooth plate 36 through a traction plate 37. The tooth plate 36 is meshed with a first gear 33 and a second gear 35. The first gear 33 is fixedly connected to the first connecting shaft 32. The first connecting shaft 32 is installed at one end of the second feed shaft 28 through the first one-way valve 30. The second gear 35 is fixedly connected to the second connecting shaft 34. The second connecting shaft 34 is installed at one end of the second feed shaft 28 on the other side through the second one-way valve 31.

[0043] Furthermore, a second auger blade 29 is provided on the second feed shaft 28, and the second feed shaft 28 is rotatably installed inside the second feed seat 26, and the second feed seat 26 is fixedly installed inside the lower processing seat 5. The bottom of the second feed seat 26 is fixedly connected to a discharge pipe 27, and the discharge pipe 27 is arranged toward the grinding support plate 53. The second feed seat 26 is connected to the interior of the first feed seat 19 through the second guide pipe 25.

[0044] Furthermore, the conveyor 2 is provided with a conveyor belt 3 for transmission, and the conveyor belt 3 is provided with a plurality of conveying partitions 4 for separating the raw materials. A partition avoidance groove 6 for avoiding the conveying partitions 4 is provided below the lower processing seat 5.

[0045] Preferably, in this embodiment, there is a corresponding gap above the interior of the second feed seat 26, so that the raw materials entering the second feed seat 26 through the second guide pipe 25 can be correspondingly stored above the interior of the second feed seat 26. When the screened raw materials are subjected to fine grinding processing, the raw materials can be discharged to the grinding support plate 53 through the discharge pipe 27 on the second feed seat 26. The output shaft of the third motor 51 drives the fifth connecting shaft 49 to rotate under the synchronous driving action of the synchronous belt 50, so that the fifth connecting shaft 49 drives the docking plate 47 to rotate, and then under the traction and rotation action of the fourth connecting shaft 48 and the arrangement action of the third connecting shaft 45, the push plate 44 is driven to drive the grinding plate 46 to swing back and forth on the grinding support plate 53, thereby facilitating the fine grinding processing of the incoming raw materials.

[0046] When the push plate 44 swings back and forth, it drives the second fixed plate 41 to pull the traction rod 38 to move back and forth on the second fixed plate 41 under the relationship of adaptive sliding connection with the first cylindrical slider 42 and the second cylindrical slider 43. Since both ends of the traction rod 38 are fixedly connected to the tooth plate 36 through the traction plate 37, the tooth plate 36 follows the reciprocating movement. When the tooth plate 36 moves toward the second gear 35, the first gear 33 drives the first connecting shaft 32 to rotate. At this time, under the unidirectional action of the first one-way valve 30, the second auger blade 29 on the second feed shaft 28 is driven to rotate clockwise, thereby facilitating the transportation of the raw materials accumulated above the inside of the second feed seat 26. At this time, the raw materials in the second feed seat 26 are discharged through the discharge pipe 27. The material is discharged into the grinding support plate 53, but under the action of the second one-way valve 31, although the second gear 35 rotates under the meshing action, it cannot drive the second feed shaft 28 thereto to rotate accordingly, so the second feed seat 26 at the first gear 33 performs the unloading process, and the second feed seat 26 at the second gear 35 does not perform the unloading work. On the contrary, when the tooth plate 36 moves in the direction close to the first gear 33, the second feed seat 26 at the first gear 33 does not perform the unloading process, and the second feed seat 26 at the second gear 35 performs the unloading work, that is, when the grinding disc 46 is performing reciprocating grinding, a state is formed in which one side unloads the material and the other side does not unload the material, thereby better facilitating the grinding process of the grinding disc 46.

[0047] When the grinding support plate 53 is being discharged, the fourth motor 59 controls the positioning plate 56 on the sixth connecting shaft 57 to rotate, so as to facilitate the flipping and opening of the unloading plate 55 (the fourth motor 59 can correspondingly control the positioning plate 56 to swing back and forth within a certain range, thereby further improving the unloading rate of the raw materials). At this time, the ground raw materials on the grinding support plate 53 can be discharged through the opened unloading plate 55, and then enter the conveyor belt 3 below for transportation, and under the separation effect of the conveying partition 4, it is convenient to transport in batches, and the conveyor belt 3 can transport the raw materials to the corresponding mixer (not shown in the figure) for mixing, which is convenient for processing and use.

[0048] This grinding process with intermittent feeding on both sides can bring many benefits, as follows: 1. The grinding particle size is more uniform, reducing "over-grinding" and "under-grinding": Refractory materials have high hardness and great brittleness. The uniformity of particle size during the grinding process directly affects the density and high-temperature performance of subsequent products. If only one side is fed, the material is easy to accumulate on the inlet side, causing the impact and grinding action of the grinding medium to be concentrated in the inlet area. The material in this area may be "over-ground" (producing too much fine powder), while the area far away from the inlet is "under-ground" (residual coarse particles) due to insufficient material, and the final particle size distribution is relatively wide. The intermittent feeding on both sides adopted in the present invention adds material alternately from both ends. While grinding repeatedly, it can simultaneously drive the material to form a "symmetrical flow" in the grinding chamber, avoiding local accumulation, making the grinding medium act more evenly on the material, and at the same time, intermittent feeding can control the single feed amount to ensure that the material concentration in the grinding chamber is always within a reasonable range (neither excessively buffering the kinetic energy of the grinding body, nor too little to cause empty grinding of the medium), ultimately making the material particle size distribution narrower and significantly reducing the ratio of coarse particles to fine powder.

[0049] 2. Improve grinding efficiency and reduce unit energy consumption: When feeding from only one side, continuous feeding can easily lead to the formation of "material plug" on the inlet side. Part of the kinetic energy of the grinding medium is buffered by excess material (rather than used to crush the material), and the effective energy consumption is low. At the same time, due to insufficient material in the area far from the inlet, the ineffective collisions between the grinding media (between the medium and the liner, and between the medium) increase, further wasting energy. The present invention uses intermittent feeding on both sides through "batch and alternating" feeding to keep the amount of material in the grinding chamber in a state of "dynamic balance" at all times, ensuring full contact between the grinding medium and the material, and avoiding the buffering effect of excessive material. In addition, the flow of material on both sides will drive the grinding medium to form a "two-way circulating motion" (rather than the one-way push of feeding from one side), increasing the collision frequency between the medium and the material, and improving the effective crushing work per unit time, thereby improving the grinding efficiency (increasing the output of qualified materials in the same time) and reducing the energy consumption per unit product.

[0050] 3. Equipment wear is more even and service life is extended: When feeding from one side, the material is concentrated on the inlet side, and the impact and friction of the grinding medium are also concentrated on the liner and medium surface in this area, resulting in the inlet side liner wear rate being several times that of the other side. The grinding medium is also prone to "one-sided out-of-roundness" and needs to be replaced frequently, increasing maintenance costs. The intermittent feeding on both sides of the present invention makes the material evenly distributed in the grinding chamber, the movement trajectory of the grinding medium is more symmetrical, the impact and friction are dispersed in the entire chamber, and the wear rate of the liner and the medium tends to be consistent. In addition, when feeding from only one side, the accumulation of material on the inlet side leads to concentrated frictional heat, increasing the risk of component deterioration. The intermittent feeding on both sides evenly distributes and smoothly flows the material, so that the heat is dispersed and transferred along with the material, effectively avoiding the degradation of material properties caused by excessive temperature, thereby facilitating the extension of the service life of the equipment.

[0051] It should be noted that the components in this application are all universal standard parts or components well known to those skilled in the art, which effectively solve the technical problems raised in the background technology.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A raw material pretreatment device for preparing a refractory nozzle, comprising a support frame (1), characterized in that: The support frame (1) is provided with a conveyor (2), the conveyor (2) is provided with a lower processing seat (5), the lower processing seat (5) is connected to an upper processing seat (7), and further comprises: a first pre-processing mechanism, which is installed at the connection between the upper processing seat (7) and the lower processing seat (5), and is used for crushing, screening and conveying the incoming raw materials, the first pre-processing mechanism comprising a movable screen plate (15) for movable screening and a first feeding seat (19) for feeding connection, the movable screen plate (15) being movably installed on the upper processing seat (7), a material dividing cone (17) for dividing the materials being provided below the movable screen plate (15), and a vibrator (14) being provided on one side of the upper processing seat (7); The second pretreatment mechanism is installed inside the lower processing seat (5) and is used for reciprocating grinding of the screened raw materials and feeding control on both sides. The second pretreatment mechanism includes a push plate (44) for grinding and feeding control, a first cylindrical slider (42), a second cylindrical slider (43) and a traction rod (38). The push plate (44) is adapted to be rotatably installed at the joint of the first cylindrical slider (42) and the second cylindrical slider (43). The first cylindrical slider (42) and the second cylindrical slider (43) are both rotatably connected to the second fixed plate (41). The second fixed plate (41) is fixedly installed on the traction rod (38), and a grinding plate (46) for grinding is provided on one side of the push plate (44).

2. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 1, characterized in that: The second pretreatment mechanism also includes a docking plate (47) and a fifth connecting shaft (49) for driving the grinding disc (46) to perform reciprocating grinding. The center of the push disc (44) is fixedly connected to a third connecting shaft (45). The third connecting shaft (45) is rotatably mounted on the docking plate (47) through a fourth connecting shaft (48). The docking plate (47) is fixedly mounted on the fifth connecting shaft (49). The fifth connecting shaft (49) is rotatably mounted on the first fixed plate (40). The first fixed plate (40) is fixedly mounted inside the lower processing seat (5).

3. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 2, characterized in that: The second pretreatment mechanism also includes a grinding support plate (53) for adapting to the grinding disc (46) for grinding, the grinding support plate (53) is fixedly installed inside the lower processing seat (5), side guide blocks (54) are provided on both sides of the grinding support plate (53), and a blanking plate (55) for blanking is provided in the middle of the grinding support plate (53), and one side of the blanking plate (55) is rotatably installed on the grinding support plate (53) through a rotating shaft.

4. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 3, characterized in that: The second pretreatment mechanism also includes a positioning plate (56) for material discharge control, wherein the positioning plate (56) is rotatably mounted on one side of the material discharge plate (55), and the positioning plate (56) is eccentrically rotatably mounted on the third fixed plate (58) through a sixth connecting shaft (57), and the sixth connecting shaft (57) is fixedly connected to the output shaft of the fourth motor (59), and the fourth motor (59) is fixedly mounted on the bottom of the grinding support plate (53).

5. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 2, characterized in that: The second pretreatment mechanism further includes a third motor (51) for driving a fifth connecting shaft (49) for rotation control, wherein the fifth connecting shaft (49) is rotationally connected to an output shaft of the third motor (51) via a synchronous belt (50), and the third motor (51) is fixedly mounted on the first fixed plate (40) via a motor mounting plate (52).

6. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 2, characterized in that: The second pretreatment mechanism also includes a tooth plate (36) for material discharge drive control, a first one-way valve (30) and a second one-way valve (31), the traction rod (38) is connected to the first fixed plate (40) in a limited sliding manner through a limiting slide (39), and both ends of the traction rod (38) are fixedly connected to the tooth plate (36) through a traction plate (37), and the tooth plate (36) is meshed with a first gear (33) and a second gear (35), the first gear (33) is fixedly connected to the first connecting shaft (32), the first connecting shaft (32) is installed at one end of the second feed shaft (28) through the first one-way valve (30), the second gear (35) is fixedly connected to the second connecting shaft (34), and the second connecting shaft (34) is installed at one end of the second feed shaft (28) on the other side through the second one-way valve (31).

7. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 6, characterized in that: A second auger blade (29) is provided on the second feed shaft (28), and the second feed shaft (28) is rotatably mounted inside the second feed seat (26). The second feed seat (26) is fixedly mounted inside the lower processing seat (5). The bottom of the second feed seat (26) is fixedly connected to a discharge pipe (27), and the discharge pipe (27) is arranged toward the grinding support plate (53). The second feed seat (26) is connected to the inside of the first feed seat (19) through the second guide pipe (25).

8. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 1, characterized in that: The first pretreatment mechanism also includes a first crushing roller (10) and a second crushing roller (11) for crushing, the first crushing roller (10) and the second crushing roller (11) are both rotatably mounted inside the upper processing seat (7), and the first crushing roller (10) and the second crushing roller (11) are rotatably connected through a gear pair (12), the second crushing roller (11) is fixedly connected to the output shaft of the first motor (13), the first motor (13) is fixedly mounted on the outer side of the upper processing seat (7), a guide hopper (8) is provided on the upper processing seat (7), a guide plate (9) for guiding material is provided on the upper side of the first crushing roller (10) and the second crushing roller (11), the guide plate (9) is fixedly mounted on the inner wall of the guide hopper (8), a discharge cavity (16) is opened below the movable screen plate (15), the material dividing cone (17) is arranged in the middle of the discharge cavity (16), and the discharge cavity (16) is connected to the inside of the first feeding seat (19) through the first guide pipe (18).

9. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 8, characterized in that: The first pretreatment mechanism further includes a first auger blade (24) for feeding, the first auger blade (24) being rotatably mounted inside the first feeding seat (19) via a first feeding shaft (23), a worm gear (22) being fixedly connected to the first feeding shaft (23), a worm gear (21) being meshedly connected to the worm gear (22), the worm gear (21) being rotatably mounted inside the first feeding seat (19), the worm gear (21) being fixedly connected to the output shaft of a second motor (20), and the second motor (20) being fixedly mounted on the outside of the first feeding seat (19).

10. The raw material pretreatment equipment for preparing a refractory nozzle according to claim 1, characterized in that: The conveyor (2) is provided with a conveyor belt (3) for transporting, and the conveyor belt (3) is provided with a plurality of conveying partitions (4) for separating raw materials. A partition avoidance groove (6) for avoiding the conveying partitions (4) is provided below the lower processing seat (5).

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