Pressing device for high-quality magnesium pellets

Abstract

The invention belongs to the technical field of ball pressing equipment, and particularly relates to a high-quality ball pressing device for manufacturing magnesium pellets, the device comprises a shell, a pair of cams, a pair of ball pressing rollers and a driving mechanism, the pair of cams are arranged in the shell in parallel, the ball pressing rollers are rotatably arranged on the cams respectively, a plurality of ball pressing grooves are formed in the surfaces of the ball pressing rollers, and the driving mechanism is arranged on the shell. A pellet re-pressing cover is arranged in the pellet pressing groove, a through hole is further formed in the bottom of the pellet pressing groove in the radial direction of the pellet pressing roller, a telescopic driving assembly is arranged in the through hole in a penetrating mode, one end of the telescopic driving assembly is connected with the pellet re-pressing cover, and the other end of the telescopic driving assembly is movably matched with the cam. When the ball pressing rollers relatively rotate around the cams to the first position, the ball pressing grooves meet and form a first ball pressing space to compress powder, and in the first ball pressing space, the telescopic driving assembly drives the pellet re-pressing cover to form a second ball pressing space to secondarily compress the powder, and pellets of a compact structure are pressed.

Description

Technical Field

[0001] The present application belongs to the technical field of pelletizing equipment, and in particular relates to a pelletizing device for producing high-quality magnesium pellets. Background Art

[0002] In the process of Pidgeon magnesium smelting, ferrosilicon, calcined dolomite (referred to as calcined white) and fluorite powder are mixed in a specific proportion, ground into powder, and then pressed into ellipsoidal pellets to produce magnesium. The pellets are calcined at high temperature to gasify the magnesium, and then cooled to collect crude magnesium oxide. Compared with magnesium pellets in other shapes such as prisms, cones or irregular particles, ellipsoidal magnesium pellets are more conducive to magnesium production at high temperatures, thereby shortening the magnesium production cycle and improving efficiency.

[0003] In the prior art, a Chinese utility model with publication number CN215365925U discloses a light-burned magnesium oxide ball pressing device, which includes a shell, the upper part of which is connected to a feed port, and the inside of which is provided with a ball pressing mechanism, a material receiving plate and a collecting drawer from top to bottom; the ball pressing mechanism includes two relatively rotating ball pressing rollers, the ball pressing rollers are connected to a driving mechanism, and the ball pressing rollers are provided with extrusion grooves that can cooperate with each other, and the upper and lower parts of the ball pressing rollers are respectively opposite to the feed port and the material receiving plate, the material receiving plate is tilted downward, and is provided with a plurality of leakage holes, and the collecting drawer is located below the material receiving plate for receiving dust falling from the leakage holes. The utility model provides leakage holes on the receiving plate, and the powder falling off the ball falls down from the leakage holes into the collecting bin, and is recycled through the collecting bin. However, in the actual ball pressing process, it is necessary to continuously adjust the ball pressing distance between the two ball pressing rollers to meet the ball making pressure. The adjustment process is cumbersome and it is difficult to ensure that dense pellets are pressed out, so that a large number of pellets are easily broken due to collision and extrusion during the process of discharging and transporting to the magnesium making furnace, and a large amount of powder and broken particles are mixed with the pellets, which ultimately leads to low magnesium making efficiency and low magnesium yield due to uneven heating of the magnesium making pellets in the magnesium making furnace, thereby reducing production benefits and increasing production costs. Summary of the invention

[0004] Based on the above-mentioned background technical needs, the present application provides a ball pressing device for high-quality magnesium pellets, which can improve the structural compactness and integrity of the magnesium pellets, prevent the magnesium pellets from being easily broken during transportation, and at the same time reduce the difficulty of debugging the ball pressing mechanism in the prior art, and reduce the probability of low output qualification rate of magnesium pellets due to structural defects.

[0005] In order to achieve the above purpose, the technical solution of this application is: A high-quality magnesium ball-making ball pressing device comprises a shell, a ball pressing mechanism and a driving mechanism, wherein a feed inlet is provided at the upper portion of the shell, and a first discharge inlet is provided at the lower portion of the shell; the ball pressing mechanism comprises at least one pair of cams, in the shell, a pair of the cams are arranged in parallel between the feed inlet and the first discharge inlet, and ball pressing rollers are rotatably arranged on the cams, a plurality of ball pressing grooves are arranged on the surfaces of the ball pressing rollers, and a ball pressing cover is movably arranged in the ball pressing grooves, and a through hole is provided at the bottom of the ball pressing groove along the radial direction of the ball pressing roller, and a telescopic driving component is penetrated in the through hole, one end of the telescopic driving component is connected to the ball pressing cover, and the other end is movably matched with the cam, when the ball pressing rollers rotate relatively around the cam to a first position, the ball pressing grooves meet and form a first ball pressing space, and in the first ball pressing space, the telescopic driving component drives the ball pressing cover to form a second ball pressing space; the driving mechanism is transmission-connected to the ball pressing rollers, and is used to drive a pair of the ball pressing rollers to rotate relatively around the cam.

[0006] Preferably, the telescopic driving assembly includes a spring and a driving rod, a stop protrusion is provided on one side of the through hole adjacent to the ball pressing groove, one end of the driving rod passes through the through hole and is connected to the ball pressing cover, and the other end is provided with a sliding protrusion, the spring is arranged around the driving rod between the stop protrusion and the sliding protrusion, and at least part of the sliding protrusion is slidably or rollingly connected to the cam surface.

[0007] Preferably, the sliding protrusion is a sphere or a wheel, and a fork is provided at one end of the driving rod away from the pellet re-compression cover, and the sliding protrusion is rollably connected to the fork.

[0008] Preferably, on the cam surface, a first flange is respectively provided along the radial direction of the cam at a position where a pair of the cams are closest to each other.

[0009] Preferably, on the cam surface, a pair of the cams are adjacent to the first flange and a plurality of second flanges are respectively provided along the radial direction of the cams, and the plurality of second flanges are distributed at intervals along the rotation direction of the ball pressing roller.

[0010] Preferably, a pair of bearings is provided between the cam and the ball pressing roller, the pair of bearings are distributed at both ends of the ball pressing roller, the inner rings of the bearings are sleeved with the cam, and the outer rings of the bearings are clamped with the ball pressing roller.

[0011] Preferably, the driving mechanism includes a motor, a pair of main driving gears and a pair of planetary gear sets, the planetary gear sets include a sun gear, a planetary gear, a planetary carrier and a ring gear, the ring gears are coaxially fixedly connected to one end of the ball pressing roller, the planetary carrier is fixedly connected to the cam, the planetary gears, the sun gear and the ring gear are meshed with each other; a pair of the main driving gears are coaxially connected to the sun gears of a pair of the planetary gear sets and meshed with each other, the motor is transmission connected to any one of the pair of main driving gears, and the motor is used to drive the main driving gears to rotate.

[0012] Preferably, the driving mechanism further includes a belt, a first pulley and a second pulley, the first pulley is connected to the driving shaft of the motor, the second pulley is coaxially connected to any one of the main driving gears, and the belt is sleeved on the first pulley and the second pulley.

[0013] Preferably, a second discharge port is further provided at the lower portion of the shell, and the first discharge port and the second discharge port are spaced apart along the direction of gravity; in the shell, a material guide trough is obliquely provided between the first discharge port and the second discharge port, one end of the material guide trough is connected to the second discharge port, and the other end extends toward the ball pressing roller away from the second discharge port, and a screening partition is provided on the material guide trough relative to the first discharge port, and a plurality of sieve holes are provided in the screening partition along the direction of gravity.

[0014] Preferably, a dust removal port is provided at the lower portion of the shell body, adjacent to the second discharge port, the dust removal port is connected to a dust removal pipe, and a dust removal fan is provided at one end of the dust removal pipe away from the dust removal port.

[0015] By adopting the above technical solution, compared with the prior art, the present application has at least the following beneficial effects: Compared with the prior art which only compresses the powder into pellets once, the pelletizing device disclosed in the present application can perform secondary compression at the same time as primary compression, which not only improves the density and forming integrity of the pellets, making the produced pellets less likely to break due to collision or extrusion, but also the two compression processes are fully automatic and continuous, avoiding the complicated process of adjusting the pelletizing pressure, and improving the formation efficiency and qualified rate of the pellets, thereby avoiding the problems of low magnesium production efficiency and low magnesium yield caused by uneven heating in the magnesium making furnace due to the inclusion of a large amount of broken particles in the magnesium making pellets fed into the magnesium making furnace, thereby helping to improve production efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the internal structure of the ball pressing device in the embodiment.

[0017] Figure 2A is a partially enlarged schematic diagram of the ball pressing roller in the embodiment.

[0018] Figure 3 FIG. B is a partially enlarged schematic diagram of the ball pressing roller in the embodiment.

[0019] Figure 4 Schematic diagram C of the local structure of the ball pressing roller in the embodiment.

[0020] Figure 5 FIG. 4 is a partial schematic diagram of a housing in an embodiment.

[0021] Figure 6 It is a partial cross-sectional view DD of the housing in the embodiment.

[0022] Figure 7 Schematic diagram of the structure of the ball pressing roller in the embodiment.

[0023] In the figure: housing 10, feed port 11, first discharge port 12, second discharge port 13, guide trough 14, screening area 141, dust removal port 15, first aggregate hopper 16, second aggregate hopper 17, ball pressing mechanism 20, cam 21, first flange 211, second flange 212, ball pressing roller 22, ball pressing groove 221, through hole 222, stop convex block 2221, ball re-pressing cover 223, telescopic drive assembly 224, spring 2241 , driving rod 2242, sliding protrusion 2243, fork 2244, bearing 23, driving mechanism 30, motor 31, main driving gear 32, planetary gear set 33, sun gear 331, planetary gear 332, planetary carrier 333, ring gear 334, belt 34, first pulley 35, second pulley 36, dust removal pipe 40, dust removal fan 50, spiral feeder 60, first conveyor belt 70, second conveyor belt 80. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The technical solution of the present application will be further described below in conjunction with the drawings of the embodiments of the present application, and the present application is not limited to the following specific implementation methods.

[0025] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "rear", "top", "bottom" and the like indicating directions or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure or component referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present patent, and for those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] The following is combined with Figure 1 To Attachment Figure 7 And specific embodiments further describe the present application in detail.

[0027] In the present application, a high-quality magnesium pellet making device (hereinafter referred to as the ball pressing device) is disclosed, the ball pressing device comprises a shell 10, a ball pressing mechanism 20 and a driving mechanism 30, wherein the shell 10 is funnel-shaped, the upper part of the shell 10 is provided with a feed port 11 for feeding powdered material (hereinafter referred to as powder) for ball pressing, and the lower part of the shell 10 is provided with a first discharge port 12 for outputting the remaining powder or pellets; the ball pressing mechanism 20 comprises a pair of cams 21 arranged in parallel in the shell 10 and ball pressing rollers 22 respectively arranged on the cams 21, wherein the cams 21 are cylindrical fixed cams 21. , which is fixed to the inner wall of the shell 10 and is located between the feed port 11 and the first discharge port 12. The ball pressing roller 22 is rotatably connected to the side of the cam 21 through a bearing 23 or other supporting components. The powder material fed into the shell 10 from the feed port 11 can pass between the pair of ball pressing rollers 22 along the direction of gravity and move toward the first discharge port 12 after being pressed by the ball pressing rollers 22; a plurality of ball pressing grooves 221 are evenly distributed on the sides of the pair of ball pressing rollers 22. The ball pressing grooves 221 are semi-spherical or semi-ellipsoidal, and along the radial direction of the ball pressing roller 22, a through hole 222 is opened at the bottom of the ball pressing groove 221 through the inner wall of the ball pressing roller 22. A ball pressing cover 223 corresponding to the shape of the ball pressing groove 221 is movably provided in the ball pressing groove 221, and a telescopic driving component 224 is provided through the through hole 222. One end of the telescopic driving component 224 is connected to the ball pressing cover 223, and the other end is connected to the side of the cam 21 to achieve active cooperation. The telescopic driving component 224 is an elastic transmission device whose other end can extend out of the through hole 222 and push the ball pressing cover 223 to move after one end is subjected to pressure. When a pair of ball pressing rollers 22 rotate relatively around the cam 21 to the first position (the first position is that the telescopic driving component 224 is connected to the cam 21), the ball pressing cover 223 is moved to the first position. The end of the wheel 21 in contact is pressed by the flange protruding from the side of the cam 21), a pair of ball pressing grooves 221 on the same horizontal plane are parallel to each other and form a first ball pressing space between the ball pressing grooves 221, and in the first ball pressing space, the telescopic driving assembly 224 drives the ball group pressing cover 223 to move relatively and form a second ball pressing space; the driving mechanism 30 includes the motor 31, transmission gears, transmission shaft and other equipment or parts in the conventional technology, and the driving mechanism 30 is connected to the ball pressing roller 22 in transmission, and the pair of ball pressing rollers 22 are driven by electric energy to rotate relatively around the cam 21 to achieve the purpose of ball pressing.

[0028] During the use of the above-mentioned ball pressing device, the powder enters from the feed port 11 and is scattered between the pair of ball pressing rollers 22. During the process in which the driving mechanism 30 drives the ball pressing rollers 22 to rotate relatively around the cam 21, as the ball pressing grooves 221 on the pair of ball pressing rollers 22 gradually approach and form the above-mentioned first ball pressing space, the powder distributed in the ball pressing grooves 221 are pressed into a ball shape by the two ball pressing grooves 221, and during this process, the cam 21 drives the telescopic driving assembly 224 to make the ball re-pressing covers 223 close to each other gather to form a second ball pressing space, further compressing the above-mentioned ball-shaped materials to form a compact ball. After the ball pressing rollers 22 continue to rotate through the first position, the compact ball leaves the ball re-pressing cover 223 under the action of centrifugation.

[0029] The use of the above-mentioned ball pressing device has at least the following beneficial effects: compared with the prior art that only compresses the powder into pellets once, the ball pressing device disclosed in the present application can perform secondary compression at the same time as primary compression, which not only improves the density and forming integrity of the pellets, making the produced pellets less likely to break easily due to collision and extrusion, but also the two compression processes are completely automatic and continuous, avoiding the complicated process of adjusting the ball making pressure, and improving the formation efficiency and qualified rate of the pellets, thereby avoiding the problems of low magnesium making efficiency and low magnesium yield caused by uneven heating in the magnesium making furnace due to the inclusion of a large amount of broken particles in the magnesium making pellets sent to the magnesium making furnace, which helps to improve production efficiency and reduce production costs.

[0030] In addition, the present application also provides some more specific implementations to improve the above-mentioned ball pressing device.

[0031] Preferably, the telescopic driving assembly 224 includes a spring 2241 and a driving rod 2242, a stopper protrusion 2221 is provided on one side of the through hole 222 adjacent to the ball pressing groove 221, one end of the driving rod 2242 passes through the through hole 222 and is connected to the ball group re-pressing cover 223, and the other end is provided with a sliding protrusion 2243, the spring 2241 is arranged around the driving rod 2242 between the stopper protrusion 2221 and the sliding protrusion 2243, and at least a portion of the sliding protrusion 2243 is in sliding or rolling contact with the side of the cam 21. Specifically, at least a portion of the sliding protrusion 2243 is a contact surface that is easy to slide or roll, such as a spherical surface or a roller surface, so that the driving rod 2242 can always be in contact with the cam 21 during the process of rotating around the side of the cam 21.

[0032] When the above-mentioned device is used, the driving rod 2242 follows the ball pressing roller 22 to move along the contour of the side of the cam 21. When the sliding protrusion 2243 has not reached the protruding position of the cam 21 or has passed the protruding position of the cam 21, the spring 2241 always remains in an extended state under the action of the stop protrusion 2221, and the driving rod 2242 fixes the ball pressing cover 223 at the bottom of the ball pressing groove 221 along the radial direction of the ball pressing roller 22 under the action of the elastic force of the spring 2241; when the sliding protrusion 2243 moves to the protruding position of the cam 21, the driving rod 2242 pushes the spring 2241 to be compressed by the pressure of the cam 21, and pushes the ball pressing cover 223 to move in the direction of extending out of the ball pressing groove 221 along the compression direction of the spring 2241. Any pair of ball pressing covers 223 move relative to each other and approach each other to form a second ball pressing space, thereby pressing out balls with a tighter structure.

[0033] Furthermore, in order to achieve a better movement coordination effect between the cam 21 and the sliding protrusion 2243, the sliding protrusion 2243 is a sphere or a wheel, and a fork 2244 is provided at one end of the driving rod 2242 away from the ball re-pressure cover 223. The fork 2244 is composed of at least two parallel fork rods, and the sliding protrusion 2243 in the form of a sphere or a wheel can be rotatably arranged between the fork rods through a rotating shaft, so that one end of the telescopic driving assembly 224 forms a rolling coordination with the cam 21.

[0034] When using the above device, the sliding protrusion 2243 in the form of a sphere or a wheel can roll around the cam 21. Compared with sliding contact, rolling contact helps to reduce the wear of the cam 21 and is easier to stabilize the movement path of the driving rod 2242, thereby improving the sensitivity of the telescopic driving assembly 224 and allowing the telescopic driving assembly 224 to regularly complete the reciprocating telescopic motion, thereby ensuring that the level of the pellet compression quality can be maintained consistent.

[0035] Furthermore, in order to further improve the sensitivity of the telescopic drive assembly 224, on the surface of the cam 21, a pair of cams 21 are respectively provided with first flanges 211 along the axial direction of the cam 21 at the closest position. Specifically, the pair of cams 21 at least include a cylinder and a first flange 211 provided between the two ends of the cylinder along the axial direction of the cylinder, and the surfaces of the opposite sides of the pair of first flanges 211 are arc surfaces.

[0036] When the above device is used, one end of the telescopic driving assembly 224 is instantly pushed out of the through hole 222 by the first flange 211 during the movement, pushing the pellet re-pressing cover 223 to suddenly apply pressure, thereby improving the efficiency of pressing the pellets.

[0037] Furthermore, in order to enable the formed pellets to quickly escape from the pellet re-pressing cover 223, a plurality of second flanges 212 are respectively arranged on the surface of the cam 21, adjacent to the first flange 211 and along the axial direction of the cam 21, and the plurality of second flanges 212 are spaced apart along the rotation direction of the ball pressing roller 22. Specifically, the cross-sections of the two cams 21 are regarded as clock dials, and on one of the cams 21, the plurality of second flanges 212 can be spaced apart at positions between three o'clock and six o'clock; on the other cam 21, the plurality of second flanges 212 are spaced apart at positions between six o'clock and nine o'clock.

[0038] When the above device is used, during the process of the ball pressing roller 22 rotating around the cam 21, the same telescopic drive assembly 224 is continuously triggered to telescope under the action of a plurality of second flanges 212 arranged at intervals after passing through the first flange 211, so that the ball re-pressing cover 223 is continuously shaken in the ball pressing groove 221, so that the ball is quickly separated from the ball re-pressing cover 223 under the action of the shaking, thereby preventing the ball from sticking to the ball re-pressing cover 223 and being mistakenly pressed for the second time after the ball pressing roller 22 rotates one circle.

[0039] Furthermore, in order to enable the above-mentioned ball pressing roller 22 to move stably around the cam 21, a pair of bearings 23 are arranged between the cam 21 and the ball pressing roller 22, and the pair of bearings 23 are distributed at both ends of the ball pressing roller 22, wherein the two ends of the cam 21 are respectively extended out of the contour of the cam 21 and are provided with a shaft body with a circular cross-section, the inner rings of the two bearings 23 are respectively sleeved on the shaft body surfaces at both ends of the cam 21, and the outer rings of the bearings 23 are clamped with the inner walls at both ends of the ball pressing roller 22.

[0040] When the above device is used, under the load-bearing effect of the bearing 23 , the ball pressing roller 22 can be driven by the driving mechanism 30 and stably rotate around the cam 21 .

[0041] Furthermore, in order to prolong the pressing process of the pellets and keep the pellet pressing roller 22 at a relatively low speed, the driving mechanism 30 includes a motor 31, a pair of main driving gears 32, and a pair of planetary gear sets 33, wherein the planetary gear set 33 includes a sun gear 331, a plurality of planetary gears 332, a planetary carrier 333, and a ring gear 334, wherein the ring gear 334 has a tooth pattern on its inner side, and the ring gear 334 is fixedly connected to one end of the pellet pressing roller 22, the planetary carrier 333 is fixedly connected to one end of the cam 21, and the planetary gears 334 are fixedly connected to one end of the cam 21. The wheel 332 and the sun gear 331 are rotatably arranged on the planetary carrier 333, and the sun gear 331, the planetary gears 332, and the ring gear 334 are meshed with each other from the inside to the outside. The above-mentioned pair of main drive gears 32 are rotatably arranged on the outside of the shell 10 through the rotating shaft, and are respectively coaxially connected to the sun gear 331 of the planetary gear set 33. The pair of main drive gears 32 are meshed with each other, and the motor 31 is fixed to the outside of the shell 10 and its drive shaft is connected to any one of the pair of main drive gears 32.

[0042] When the above device is used, the starter motor 31 drives a pair of main drive gears 32 to rotate relative to each other under meshing action, and the sun gear 331 coaxially connected to each main drive gear 32 also rotates relative to each other, and the planetary gears 332 rotate around the sun gear 331 through the planetary carrier 333, so as to drive the ring gear 334 to rotate. The ring gear 334 rotates at a speed slower than the sun gear 331 according to the reduction ratio of the planetary gear 332, so under the deceleration effect of the planetary gear set 33, the ball pressing roller 22 rotates stably at a speed lower than the main drive gear 32, thereby extending the time for the telescopic drive assembly 224 to contact the profile of the cam 21, so that the ball pressing process is prolonged, so as to facilitate pressing into compact balls.

[0043] Furthermore, in order to reduce the load impact between the motor 31 and the main drive gear 32 so that the main drive gear 32 can transmit stably, the above-mentioned driving mechanism 30 also includes a belt 34, a first pulley 35 and a second pulley 36, wherein the first pulley 35 is connected to the driving shaft of the motor 31, and the second pulley 36 is coaxially connected to any one of a pair of main drive gears 32, and the belt 34 is sleeved on the first pulley 35 and the second pulley 36.

[0044] When using the above device, the motor 31 drives the second pulley 36 to rotate through the friction force of the belt 34 while driving the first pulley 35 to rotate, thereby reducing the power of starting the main driving gear 32 and avoiding excessive load impact that affects the service life and operating stability of the above driving mechanism 30.

[0045] Furthermore, during the discharging process, in order to collect the formed pellets separately from the remaining powder, a second discharge port 13 is also provided at the lower portion of the shell 10, and the first discharge port 12 and the second discharge port 13 are spaced apart along the direction of gravity, and in the shell 10, a guide trough 14 is obliquely provided between the first discharge port 12 and the second discharge port 13, one end of the guide trough 14 is connected to the second discharge port 13, and the other end extends obliquely upward and toward the lower side of the ball pressing roller 22 away from the second discharge port 13, and a screening area 141 is provided on the bottom surface of the guide trough 14 relative to the first discharge port 12, and a plurality of sieve holes are provided in the screening area 141 along the direction of gravity.

[0046] When the above device is used, the material guide trough 14 is used to receive the pellets pressed by the ball pressing roller 22 and the remaining powder and guide the pellets to roll out of the second discharge port 13 in an inclined downward direction to be collected, and the remaining powder is discharged from the screening area 141 along the direction of gravity to the first discharge port 12 under the action of the sieve holes to be collected.

[0047] Specifically, the upper end of the material guide trough 14 can at least extend to the middle of a pair of ball pressing rollers 22 to receive the pellets. In order to ensure that the powder and the pellets falling off the ball pressing rollers 22 can be accurately received by the material guide trough 14, a second collecting hopper 17 is fixedly provided on the inner wall of the shell 10 between the ball pressing rollers 22 and the material guide trough 14.

[0048] In order to further avoid the admixture of discrete powder during the process of collecting pellets, a dust removal port 15 is opened at the lower part of the shell 10, adjacent to the above-mentioned second discharge port 13. The dust removal port 15 is located outside the shell 10 and is connected to a dust removal pipe 40. A dust removal fan 50 is set at the end of the dust removal pipe 40 away from the dust removal port 15.

[0049] When the above device is used, when the pellets roll down to the second discharge port 13, the dust removal fan 50 generates negative pressure at the dust removal port 15 through the dust removal pipe 40, and sucks out the powder that has not been screened out by the screening area 141 from around the pellets, thereby reducing the amount of powder doping in the pellets, so that the collected pellets can reduce the process of re-screening and can be directly transported to the magnesium making furnace to participate in the magnesium making reaction.

[0050] In addition, the present application also discloses a ball pressing system, which helps to improve ball pressing efficiency and reduce resource waste.

[0051] The ball pressing system includes the above-mentioned ball pressing device, a first conveyor belt 70 arranged at the feed port 11, a second conveyor belt arranged at the dust removal fan 50, and a screw feeder 60 arranged at the first discharge port 12, wherein the discharge end of the first conveyor belt 70 extends into the feed port 11 and reaches above a pair of ball pressing rollers 22, and is used to transport the powder into the housing 10. In order to enable the powder to accurately reach the position between the ball pressing rollers 22, a first collecting hopper 16 is also arranged between the first conveyor belt 70 and the ball pressing rollers 22. The first collecting hopper 16 collects the powder and concentrates it. The powder is placed between the ball pressing rollers 22 to improve the ball pressing efficiency; the air outlet of the dust removal fan 50 is connected to a powder collecting box, and the collected powder is discharged to the second conveyor belt 80 through a valve at the discharge port of the powder collecting box. The second conveyor belt 80 transports this part of the powder to the first conveyor belt 70 so that this part of the powder can be reused to avoid powder loss; the screw feeder 60 arranged at the first discharge port 12 can also transport the remaining large amount of powder to the powder placement place, so that the powder can be lifted and placed on the first conveyor belt 70 again for reuse.

[0052] In combination with the multiple structures and features in the above embodiments, the above-mentioned ball pressing device and ball pressing system can achieve the beneficial effects of improving the quality and efficiency of ball pressing, reducing resource waste, and reducing production costs.

[0053] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A high-quality magnesium pelletizing device. It is characterized in that include, A shell, wherein the upper portion of the shell is provided with a feed inlet, and the lower portion of the shell is provided with a first discharge outlet; The ball pressing mechanism comprises at least one pair of cams, wherein the pair of cams are arranged in parallel between the feed port and the first discharge port in the shell, and ball pressing rollers are rotatably arranged on the cams, and a plurality of ball pressing grooves are arranged on the surfaces of the ball pressing rollers, and a ball re-pressing cover is movably arranged in the ball pressing grooves, and a through hole is arranged at the bottom of the ball pressing grooves along the radial direction of the ball pressing rollers, and a telescopic driving component is arranged through the through hole, and one end of the telescopic driving component is connected to the ball re-pressing cover, and the other end is movably matched with the cam, and when the ball pressing rollers rotate relatively around the cams to the first position, the ball pressing grooves meet and form a first ball pressing space, and in the first ball pressing space, the telescopic driving component drives the ball re-pressing cover to form a second ball pressing space; and, A driving mechanism is connected to the ball pressing rollers in a transmission manner and is used to drive a pair of the ball pressing rollers to rotate relative to each other around the cam.

2. The ball pressing device according to claim 1, It is characterized in that The telescopic driving assembly includes a spring and a driving rod. A stop protrusion is provided on one side of the through hole adjacent to the ball pressing groove. One end of the driving rod passes through the through hole and is connected to the ball pressing cover, and the other end is provided with a sliding protrusion. The spring is arranged around the driving rod between the stop protrusion and the sliding protrusion, and at least a part of the sliding protrusion is slidably or rollingly connected to the cam surface.

3. The ball pressing device according to claim 2, It is characterized in that The sliding protrusion is a sphere or a wheel body, and a fork is provided at one end of the driving rod away from the pellet re-pressing cover, and the sliding protrusion is rollably connected to the fork.

4. The ball pressing device according to claim 1, It is characterized in that On the cam surface, first flanges are respectively provided along the axial direction of the cam at the positions where a pair of the cams are closest to each other.

5. The ball pressing device according to claim 4, It is characterized in that On the cam surface, a pair of the cams are adjacent to the first flanges and a plurality of second flanges are respectively arranged along the axial direction of the cams, and the plurality of second flanges are distributed at intervals along the rotation direction of the ball pressing roller.

6. The ball pressing device according to claim 1, It is characterized in that A pair of bearings is arranged between the cam and the ball pressing roller. The pair of bearings are distributed at both ends of the ball pressing roller. The inner rings of the bearings are sleeved with the cam, and the outer rings of the bearings are clamped with the ball pressing roller.

7. The ball pressing device according to claim 1, It is characterized in that The driving mechanism includes a motor, a pair of main driving gears and a pair of planetary gear sets, the planetary gear sets include a sun gear, a planetary gear, a planetary carrier and a gear ring, the gear rings are respectively coaxially fixedly connected to one end of the ball pressing roller, the planetary carrier is fixedly connected to the cam, and the planetary gears, the sun gear and the gear ring are meshed with each other; A pair of the main drive gears are respectively coaxially connected to the sun gears of a pair of the planetary gear sets and mesh with each other. The motor is connected to any one of the pair of the main drive gears, and the motor is used to drive the main drive gears to rotate.

8. The ball pressing device according to claim 7, It is characterized in that The driving mechanism also includes a belt, a first pulley and a second pulley, the first pulley is connected to the driving shaft of the motor, the second pulley is coaxially connected to any one of the main driving gears, and the belt is sleeved on the first pulley and the second pulley.

9. The ball pressing device according to claim 1, It is characterized in that A second discharge port is also provided at the lower part of the shell, and the first discharge port and the second discharge port are spaced apart along the direction of gravity; in the shell, a material guide trough is obliquely provided between the first discharge port and the second discharge port, one end of the material guide trough is connected to the second discharge port, and the other end extends toward the ball pressing roller away from the second discharge port, and a screening partition is provided on the material guide trough relative to the first discharge port, and a plurality of sieve holes are provided in the screening partition along the direction of gravity.

10. The ball pressing device according to claim 9, It is characterized in that A dust removal port is provided at the lower part of the shell body, adjacent to the second discharge port. A dust removal pipe is provided in communication with the dust removal port. A dust removal fan is provided at one end of the dust removal pipe away from the dust removal port.

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