A powder-selecting device for crushing and selecting granular fluorinated gypsum and its process

Abstract

The present invention discloses a powder and granular fluorgypsum crushing and selection device and a process thereof, and relates to the technical field of fluorgypsum crushing. The powder and granular fluorgypsum crushing and selection device and the process thereof comprise: a motor, a plurality of grinding rollers are connected to the bottom of the motor's rotor, a grinding ring is provided on the outside of the grinding roller, an analyzer is provided directly above the grinding roller, a scraper mechanism is used to scoop up the material and reduce the material adhering to the scraper plate surface; a material leveling mechanism is used to control the number and position of the material's falling points and to dry the material during its falling process. The powder and granular fluorgypsum crushing and selection device and the process thereof are designed with multiple closable discharge ports in the circumferential direction, and the amount of material discharged at different positions is controlled by the number of connected discharge ports. The scraper plate and the drying and dividing member are both connected to the air box. Through the action of heat, the material is dried and the probability of wet material adhering to the scraper plate is reduced, thereby improving the efficiency of fluorgypsum crushing.

Description

Technical Field

[0001] The invention relates to the technical field of fluorspar pulverization, and in particular to a powder selection device for pulverizing and selecting granular fluorspar and a process thereof. Background Art

[0002] The powder and granular fluorspar crushing and powder selection device drives the grinding roller to roll inside the grinding ring through the motor, crushing, grinding the powder and granular fluorspar entering the grinding chamber. Combined with the curved scraper design, the material is scooped up and thrown to make it fully crushed between the grinding roller and the grinding ring. The diameter of the powder blown up is screened by the analyzer.

[0003] Referring to Chinese Patent Publication No. CN112473987A, a gypsum crushing device includes a support plate, support columns are welded to the bottom of the support plate, a crushing box is welded to the top of the support plate, and a feed pipe is interlocked with the top of the crushing box. A first trough is fixedly connected to the interior of the support column, and a second trough is welded to one side of the support column. In the present invention, the device can crush large pieces of gypsum into small pieces by using two opposing crushing rollers. Then, the gypsum can be crushed into powder by using a crushing grinding disc, thereby improving the efficiency of the crushing and grinding. The heat in the auxiliary heating box can be blown into the crushing box by a blower to dry the gypsum, thereby preventing the gypsum powder from containing moisture and causing it to cling to the wall and accumulate into blocks. The electric fan can suck the dust particles raised in the crushing box into the dust storage box for storage, thereby preventing the gypsum powder from being blown out, making the device dust-free and more environmentally friendly.

[0004] When the humidity of fluorinated gypsum is high, the gypsum material is easy to adhere to the surface of the scraper, and then accumulate and clog the scraper. This is especially true for gypsum stored or transported in a humid environment. For example, even if hot air is introduced, the materials are easy to stick together. Compared with single fluorinated gypsum, one-time crushing and grinding can only crush the outer layer of the fluorinated gypsum mass, and the inner layer still needs to be crushed and ground, which increases the difficulty of crushing and grinding. In addition, wet materials are easy to adhere to the tools, especially the scraper that is in direct contact with the material and has a large surface area. It is difficult to achieve effective cleaning at a fixed point only by blowing in hot air. Fluorinated gypsum material falls into the crushing and grinding box from a feed port. There is more material at the drop point, and the grinding rollers in other parts are less or even have no material in contact. However, the amount of material received by each grinding roller cannot be adjusted, and the working efficiency of each grinding roller is different, and the working efficiency can be further improved. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a powder and granular fluorgypsum crushing and powder selection device and a process thereof. A plurality of closable discharge ports are designed in the circumferential direction, and the discharge amount at different positions is controlled by the number of connected discharge ports. The scraper plate and the drying and dividing parts are all connected to the air box. Through the action of heat, the material is dried and the probability of moist material adhering to the scraper plate is reduced, thereby improving the fluorgypsum crushing efficiency.

[0006] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solution: A powder and granular fluorgypsum crushing and powder selection device, comprising: a motor, a plurality of grinding rollers connected to the bottom of the motor's rotor, the grinding rollers being arranged in a wind box, a grinding ring being arranged on the outside of the grinding rollers, an analyzer being arranged directly above the grinding rollers, and a plurality of scraper mechanisms being installed below the grinding rollers, the scraper mechanisms being used to scoop up materials and reduce the amount of materials adhering to the scraper plate surface;

[0007] A hot air blower is connected to the wind box. A plurality of wind guide plates distributed in a circumferential direction are provided at the bottom of the wind box. A material balancing mechanism is connected to the top of the wind guide plate. The material balancing mechanism is used to control the number and position of the falling points of the material and to dry the material during the falling process.

[0008] Preferably, the top of the analyzer is connected to a shell, and the side of the bottom of the shell is connected to a number of plug-in boxes equidistantly distributed in the circumferential direction, each of the plug-in boxes is provided with a vertical hole on the top, and each of the plug-in boxes is provided with a horizontal hole on the side away from the axis of the shell, the top of the vertical hole is connected to a feed pipe, the top of the vertical hole is connected to a discharge pipe, the horizontal hole is connected with an insert plate, the side of the insert plate away from the shell is connected to a handle, and the insert plate is used to control the connection or closure of the discharge pipe and the feed pipe.

[0009] Preferably, a first air cavity is provided inside the wind box, a second channel is provided on the side of the wind box, the air duct of the hot air blower is connected to the first air cavity through the second channel, the scraper mechanism, the material distribution mechanism, the grinding roller and the grinding ring are all arranged in the wind box, the analyzer is used to screen the diameter of the upward blown powder, an air inlet is provided between adjacent wind guide plates, the bottom of the wind guide plate is connected to the bottom wall of the wind box through the bottom plate, a bottom groove is provided on the top of the bottom plate, the scraper mechanism is provided above the bottom groove, the fixed end of the scraper mechanism close to the axis of the shell is connected to the rotator, and the side of the grinding ring is connected to a connecting ring.

[0010] Preferably, the material balancing mechanism includes: a top plate, which is connected to the grinding ring through a connecting ring, and the top of the top plate, the top of the connecting ring and the top of the grinding ring are located in the same plane, and a plurality of first channels are opened through the top of the top plate, and the number of the first channels matches the number of the plug-in boxes, the outer edge of the bottom of the top plate is connected to the outer ring plate, and the inner edge of the bottom of the top plate is connected to the inner ring plate, and the outer ring plate and the inner ring plate are both truncated cone-shaped hollow shells, and a cavity is provided between the outer ring plate and the inner ring plate, and the outer ring plate and the inner ring plate form a material balancing box, and the bottom of the material balancing box is provided with an outlet, and the cavity is connected to the outlet, and the side surface of the lower part of the material balancing box is opened through a plurality of placement openings distributed in a circumferential direction, and the placement openings are arched, and each of the placement openings is equipped with a drying material dividing component, and the outlet is provided between adjacent drying material dividing components, and the drying material dividing component dries the material in the cavity through upstream hot air and disperses it to adjacent outlets.

[0011] Preferably, the drying material dividing part includes: an upper arc plate, the upper arc plate is connected to the placement port, the upper arc plate is adapted to the placement port, a plurality of air holes are opened through the top of the upper arc plate, the two ends of the upper arc plate are connected to the end plate, the two ends of the upper arc plate are connected to the lower arc plate through the end plate, the side of the upper arc plate close to the axis of the wind box and the side of the lower arc plate close to the axis of the wind box are commonly connected to the side plate, the upper arc plate and the lower arc plate are both semicircular beam plates, the upper arc plate and the lower arc plate form a blanking plate, an air duct is arranged between the upper arc plate and the lower arc plate, and the outlet is arranged between adjacent upper arc plates.

[0012] Preferably, the distance from the middle of the upper arc plate to the bottom plate is greater than the distance from other parts of the upper arc plate to the bottom plate, the top of the first channel is connected to the bottom end of the discharge pipe extending into the wind box, and the middle of each upper arc plate is located directly below a first channel.

[0013] Preferably, the scraper mechanism includes: a scraper plate, the fixed end of the scraper plate is connected to the bottom of the rotator, the scraper plate is arranged above the bottom trough, the material equalizing mechanism is located between the scraper plate and the wind guide plate, baffles are connected on both sides of the scraper plate, a second air cavity is opened at the bottom of the scraper plate, and a plurality of inclined holes are opened through the upper surface of the scraper plate, and the bottom of the inclined holes is connected to the second air cavity.

[0014] Preferably, the longitudinal cross-section of the inclined hole is a trapezoid, the lower base of the trapezoid is far away from the baffle, the length of the lower base of the trapezoid is greater than the length of the upper base of the trapezoid, the two waists of the trapezoid gradually approach each other along a virtual straight line, the upper waistline of the two waistlines of the trapezoid is the first waistline, the lower waistline of the two waistlines of the trapezoid is the second waistline, and the angle between the first waistline and the horizontal line is greater than the angle between the second waistline and the horizontal line.

[0015] A powder and granular fluorgypsum crushing and powder selection process includes a powder and granular fluorgypsum crushing and powder selection device, a fan blows hot air into a first air cavity, a second air cavity, an air inlet, and a cavity; the number of discharge channels is determined and a corresponding number of plug plates are pulled out from the plug box to connect the feed pipe with the discharge pipe; the material falls onto the upper arc plate through the discharge pipe, and the material on the upper arc plate slides down the arc surface to the bottom of both ends and slides into the bottom trough, and the material in the upper arc plate and the cavity is dried in the hot air; the motor drives the grinding roller to roll in the grinding ring to crush, crush and grind the powder and granular fluorgypsum entering the grinding cavity, the scraper plate scoops up and scatters the material, and the inclined hole is used to blow off the material adhering to the upper surface of the scraper plate under the action of wind, so that it is fully crushed between the grinding roller and the grinding ring; the upward wind blows the crushed material to the analyzer, and the analyzer screens the diameter of the upward blown powder.

[0016] Beneficial Effects: This invention provides a device and process for crushing and selecting granular fluorgypsum. Compared with existing technologies, it has the following advantages: 1. Multiple closable discharge ports are designed along the circumference. The number of connected discharge ports controls the amount of material discharged at different locations. The scraper plate and drying and dividing element are both connected to the air box. The hot air dries the material as it falls and slides, reducing the probability of wet material adhering to the scraper plate and improving the efficiency of fluorgypsum crushing.

[0017] 2. By setting up multiple feeding channels, material is fed simultaneously from multiple feeding points spaced evenly along the circumference. With a single feeding channel, material accumulates at a single point, resulting in varying amounts of material in different areas, or even no material at all. The roller must rotate to the feeding point to obtain sufficient material, reducing the grinding efficiency of the roller. Furthermore, excessive accumulation of material at the feeding point places heavy strain on the scraper blade and roller, hindering long-term use. By distributing the material volume dropped per unit time from a single feeding point to multiple locations, each roller can simultaneously grind an appropriate amount of fluorstypsum, while also increasing the amount of fluorstypsum ground per unit time and improving grinding efficiency.

[0018] 3. The height of the center of the upper arc plate relative to the base plate is greater than that of the rest of the plate. The center of the upper arc plate faces the discharge pipe, and most material falls into the center of the upper arc plate, which is the highest point. The fluorgypsum on the upper arc plate slides along the curved surface toward the two bottom ends of the upper arc plate. As the fluorgypsum slides down the upper arc plate, air flowing from the air holes blows the fluorgypsum and removes moisture from the surface. The semicircular shape of the upper arc plate transforms the horizontal sliding path into a curved one, increasing the fluorgypsum's falling distance and improving the drying effect.

[0019] 4. The longitudinal cross-section of the inclined hole is trapezoidal, with the lower base of the trapezoid away from the baffle and longer than the upper base. This makes the inlet area of ​​the trapezoidal channel larger than the outlet area. As air flows from the larger hole to the smaller hole, the hole becomes smaller and the flow velocity v increases. According to Bernoulli's principle, the wind pressure increases as the hole increases from small to large. This increases the wind pressure after the air exits the inclined hole, which helps to remove the fluorinated gypsum adhering to the scraper blade surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the present application and enable those skilled in the relevant art to make and use the present application.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a cross-sectional schematic diagram of the present invention.

[0024] Figure 3 This is a separate diagram of the shell, wind box, and the internal structure of the shell and wind box.

[0025] Figure 4 It is a structural diagram of the shell and wind box.

[0026] Figure 5 It is a structural diagram of the plug-in box.

[0027] Figure 6 for Figure 3 Schematic diagram of the structure after removing the shell and wind box.

[0028] Figure 7 for Figure 6 Schematic diagram of the structure after removing the analyzer, rotating part, and hot air blower.

[0029] Figure 8 It is a structural diagram of the material balancing mechanism and the scraper mechanism.

[0030] Figure 9 It is a structural diagram of the material balancing mechanism.

[0031] Figure 10 This is an exploded view of the material balancing mechanism.

[0032] Figure 11 It is a structural diagram of the drying and dividing parts.

[0033] Figure 12 It is a structural diagram of the scraper mechanism.

[0034] Figure 13 It is a cross-sectional schematic diagram of the scraper mechanism.

[0035] Figure 14 A is a structural diagram.

[0036] The reference numerals in the figure are: 11, housing; 12, wind box; 13, analyzer; 14, rotor; 15, motor; 16, grinding roller; 17, grinding ring; 18, connecting ring; 19, bottom plate; 21, plug box; 22, vertical hole; 23, horizontal hole; 24, feed pipe; 25, discharge pipe; 26, plug board; 27, handle; 31, air guide plate; 32, hot air blower; 33, air inlet; 34, first air cavity; 4, uniform material Mechanism; 41. Top plate; 42. Outer ring plate; 43. Inner ring plate; 44. Cavity; 45. Placement port; 46. Drying and dividing parts; 461. Upper arc plate; 462. Lower arc plate; 463. Air hole; 464. Side plate; 465. Air duct; 47. First channel; 5. Scraper mechanism; 51. Scraper plate; 52. Inclined hole; 53. Baffle; 54. Second air cavity; 61. Bottom trough; 62. Second channel; 63. Channel.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] Example 1: Figure 1 - Figure 14As shown, an embodiment of the present invention provides a powder and granular fluorgypsum crushing and powder selection device and a process thereof, including: a motor 15, a plurality of grinding rollers 16 are connected to the bottom of the rotor 14 of the motor 15, the grinding rollers 16 are arranged in the wind box 12, and a grinding ring 17 is arranged on the outside of the grinding roller 16, a hot air blower 32, the hot air blower 32 is connected to the wind box 12, and a plurality of air guide plates 31 distributed in a circumferential direction are arranged at the bottom of the wind box 12, and a material balancing mechanism 4 is connected to the top of the air guide plate 31, and the material balancing mechanism 4 is used to control the number and position of the falling points of the material and to dry the material during the falling process.

[0041] The top of the analyzer 13 is connected to the shell 11, and the side of the bottom of the shell 11 is connected to several plug-in boxes 21 distributed equidistantly in the circumferential direction. A vertical hole 22 is opened through the top of each plug-in box 21, and a horizontal hole 23 is opened on the side of each plug-in box 21 away from the axis of the shell 11. The top of the vertical hole 22 is connected to the feed pipe 24, and the top of the vertical hole 22 is connected to the discharge pipe 25. The horizontal hole 23 is connected to the plug-in plate 26, and the side of the plug-in plate 26 away from the shell 11 is connected to the handle 27. The plug-in plate 26 is used to control the connection or closure of the discharge pipe 25 and the feed pipe 24.

[0042] A first air cavity 34 is provided inside the wind box 12, and a second channel 62 is provided on the side of the wind box 12. The air duct of the hot air blower 32 is connected to the first air cavity 34 through the second channel 62. The scraper mechanism 5, the material distribution mechanism 4, the grinding roller 16, and the grinding ring 17 are all arranged in the wind box 12. The analyzer 13 is used to screen the diameter of the upwardly blown powder. An air inlet 33 is provided between adjacent air guide plates 31. The bottom of the air guide plate 31 is connected to the bottom wall of the wind box 12 through the bottom plate 19. A bottom groove 61 is provided on the top of the bottom plate 19. The scraper mechanism 5 is provided above the bottom groove 61. The fixed end of the scraper mechanism 5 close to the axis of the shell 11 is connected to the rotator 14, and the side of the grinding ring 17 is connected with a connecting ring 18.

[0043] The material distribution mechanism 4 includes: a top plate 41, the top plate 41 is connected to the grinding ring 17 through the connecting ring 18, the top of the top plate 41 and the top of the connecting ring 18 and the top of the grinding ring 17 are located in the same plane, the top of the top plate 41 is penetrated by a plurality of first channels 47, the number of the first channels 47 matches the number of the plug-in boxes 21, the outer edge of the bottom of the top plate 41 is connected to the outer ring plate 42, the inner edge of the bottom of the top plate 41 is connected to the inner ring plate 43, the outer ring plate 42 and the inner ring plate 43 are both truncated cone-shaped hollow shells, the outer ring plate A cavity 44 is provided between the outer ring plate 42 and the inner ring plate 43. The outer ring plate 42 and the inner ring plate 43 form a material distribution box. An outlet is provided at the bottom of the material distribution box. The cavity 44 is connected to the outlet. A plurality of placement openings 45 distributed in a circumferential direction are provided on the side surface of the lower part of the material distribution box. The placement openings 45 are arched. Each placement opening 45 is equipped with a drying material distribution piece 46. The outlet is provided between adjacent drying material distribution pieces 46. The drying material distribution piece 46 dries the material in the cavity 44 through the upstream hot air and disperses it to the adjacent outlet.

[0044] The top of the material balancing box can be connected to an air outlet pipe, and the air outlet pipe is used to discharge water vapor from the material balancing box.

[0045] The drying material dividing part 46 includes: an upper arc plate 461, the upper arc plate 461 is connected to the placement port 45, the upper arc plate 461 is adapted to the placement port 45, a plurality of air holes 463 are opened through the top of the upper arc plate 461, the two ends of the upper arc plate 461 are connected to the end plate, the two ends of the upper arc plate 461 are connected to the lower arc plate 462 through the end plate, the side of the upper arc plate 461 close to the axis of the wind box 12 and the side of the lower arc plate 462 close to the axis of the wind box 12 are commonly connected to the side plate 464, the upper arc plate 461 and the lower arc plate 462 are both semicircular beam plates, the upper arc plate 461 and the lower arc plate 462 form a blanking plate, an air duct 465 is arranged between the upper arc plate 461 and the lower arc plate 462, and the outlet is arranged between adjacent upper arc plates 461.

[0046] The distance between the middle part of the upper arc plate 461 and the bottom plate 19 is greater than the distance between other parts of the upper arc plate 461 and the bottom plate 19. The bottom of the discharge pipe 25 extends into the wind box 12 and is connected to the first channel 47. The middle part of each upper arc plate 461 is located directly below a first channel 47.

[0047] A powder and granular fluorinated gypsum crushing and powder selection process, including a powder and granular fluorinated gypsum crushing and powder selection device, a fan blows hot air into the first air cavity 34, the second air cavity 54, the air inlet 33, and the cavity 44; determines the number of discharge channels and pulls out the corresponding number of plug-ins 26 from the plug box 21, so that the feed pipe 24 is connected to the discharge pipe 25; the material falls onto the upper arc plate 461 through the discharge pipe 25, and the material on the upper arc plate 461 slides down along the arc surface to the bottom of both ends and slides into the bottom trough 61, and the upper arc plate The materials in 461 and cavity 44 are dried in the hot air; the motor 15 drives the grinding roller 16 to roll in the grinding ring 17 to crush, grind and grind the powdered fluorinated gypsum entering the grinding cavity; the scraper plate 51 scoops up and throws the materials; the inclined hole 52 is used to blow off the materials adhering to the upper surface of the scraper plate 51 under the action of wind, so that they are fully crushed between the grinding roller 16 and the grinding ring 17; the upward wind blows the crushed materials to the analyzer 13, and the analyzer 13 screens the diameter of the powder blown up.

[0048] The material discharge channel refers to a channel composed of a feed pipe 24 , a discharge pipe, and an insert box 21 .

[0049] When in use, start the hot air blower 32, and the hot air in the hot air blower 32 enters the first air cavity 34 of the air box 12 through the pipe. The first air cavity 34 is provided with a scraper plate 51 and a drying dividing piece 46. A second air cavity 54 is provided at the bottom of the scraper plate 51. The drying dividing piece 46 forms an open box body through the upper arc plate 461 and the lower arc plate 462 side plate 464. An air duct 465 is provided in the box body. The first air cavity 34 is respectively connected with the second air cavity 54 and the air duct 465. The hot air in the air duct 465 enters the cavity 44 through the air hole 463 on the upper arc plate 461.

[0050] Determine the number of material discharge channels (the more discharge channels open, the more fluorgypsum drops per unit time, and the higher the crushing efficiency). By setting up multiple discharge channels, material is fed simultaneously from a single point to multiple discharge points equidistant along the circumference. With a single discharge, material accumulates at a single point, and material from different areas can only be moved by the rotating scraper plate 51. The amount of material in different areas may vary, or even disappear. When the grinding roller 16 near the discharge point is crushing and grinding a large amount of material, the grinding roller 16 in other positions is crushing and grinding little or no material. It must rotate to the discharge point to obtain sufficient material, reducing the grinding efficiency of the grinding roller 16. Furthermore, the accumulation of material at the discharge point increases the workload of the scraper plate 51 and the grinding roller 16, making it difficult to use for a long time. By dispersing the amount of material falling per unit time at a delivery point to multiple falling positions (or even appropriately increasing the amount of material falling per unit time, depending on the actual production needs and the strength of the crushing and grinding tools), it can be ensured that each grinding roller 16 crushes and grinds an appropriate amount of fluorspar at the same time, and the amount of fluorspar crushed and ground per unit time can be increased, thereby improving the crushing efficiency.

[0051] After determining the discharge channel, the insert plate 26 is opened from the insert box 21. The feed pipe 24 and the discharge pipe in this discharge channel are connected, and the material is placed into the feed pipe 24 at the same time. The fluorinated gypsum in the feed pipe 24 falls into the cavity 44 through the discharge pipe and the first channel 47. The hot air in the cavity 44 preliminarily heats the falling fluorinated gypsum, and the water vapor generated after heating is discharged from the air outlet pipe at the top of the equalizing box. The fluorinated gypsum falls onto the upper arc plate 461. The upper arc plate 461 is a semicircular beam plate. The height of the middle part of the upper arc plate 461 to the bottom plate 19 is greater than the height of the other parts of the upper arc plate 461 to the bottom plate 19. The middle part of the upper arc plate 461 faces the discharge pipe. Most of the material falls on the middle part of the upper arc plate 461, which is the highest point. The fluorinated gypsum on the upper arc plate 461 slides along the curved surface toward the two bottom ends of the upper arc plate 461. As the fluorgypsum slides down the upper arc plate 461, the wind flowing out of the air holes 463 blows the fluorgypsum and removes moisture from the surface of the fluorgypsum. The upper arc plate 461 is configured as a semicircular plate, converting the horizontal sliding path into a curved sliding path, increasing the falling distance of the fluorgypsum and improving the drying effect of the fluorgypsum.

[0052] Example 2: Figure 1 - Figure 14 As shown, an embodiment of the present invention provides a powder and granular fluorgypsum crushing and powder selection device, wherein an analyzer 13 is provided directly above the grinding roller 16, and a plurality of scraper mechanisms 5 are installed below the grinding roller 16, and the scraper mechanisms 5 are used to scoop up the material and reduce the material adhering to the surface of the scraper plate 51.

[0053] The scraper mechanism 5 includes: a scraper plate 51, the fixed end of the scraper plate 51 is connected to the bottom of the rotator 14, the scraper plate 51 is arranged above the bottom groove 61, the material distribution mechanism 4 is located between the scraper plate 51 and the wind guide plate 31, and baffles 53 are connected to both sides of the scraper plate 51. A second air cavity 54 is opened at the bottom of the scraper plate 51, and a plurality of inclined holes 52 are opened through the upper surface of the scraper plate 51, and the bottom of the inclined hole 52 is connected to the second air cavity 54.

[0054] The longitudinal cross-section of the inclined hole 52 is a trapezoid, the lower base of the trapezoid is away from the baffle 53, the length of the lower base of the trapezoid is greater than the length of the upper base of the trapezoid, the two waists of the trapezoid gradually approach each other along a virtual straight line, the upper waistline of the two waistlines of the trapezoid is the first waistline, the lower waistline of the two waistlines of the trapezoid is the second waistline, and the angle between the first waistline and the horizontal line is greater than the angle between the second waistline and the horizontal line.

[0055] During use, the scraper blade 51 scoops up the fluorgypsum and throws it into the gap between the grinding roller 16 and the grinding ring 17. The grinding roller 16, which fits snugly with the grinding ring 17, crushes and grinds the fluorgypsum. However, fluorgypsum particles are fine and have a large specific surface area, making them susceptible to absorbing moisture and other substances, resulting in a certain degree of stickiness. Furthermore, fluorgypsum may contain impurities or soluble components that, under certain conditions, can hydrate or form sticky substances, further increasing its stickiness. When the fluorgypsum is at high humidity (especially when stored or transported in humid environments), it exhibits a certain degree of stickiness. When the scraper blade 51 contacts and moves the fluorgypsum, the fluorgypsum (especially clumps) tend to adhere to the scraper blade 51, preventing it from lifting the fluorgypsum. This adherence not only reduces the scraper blade's performance (i.e., its ability to lift and throw objects), but also increases its overall weight, placing a greater load on rotating components and increasing the risk of damage. The blade 51 is provided with an oblique hole 52 extending through its surface. The longitudinal cross-section of the oblique hole 52 is trapezoidal, with the lower base of the trapezoid farther from the baffle 53 and the length of the lower base greater than the upper base. This results in the trapezoidal channel's air inlet 33 having a larger area than the air outlet. As air flows from a larger air hole 463 to a smaller air hole 463, since the air can be approximated as an ideal fluid and remains constant at the same height h, according to the continuity equation A1v1 = A2v2 (A is the cross-sectional area, v is the flow velocity), the smaller the air hole 463, the greater the flow velocity v. Furthermore, according to Bernoulli's principle, the wind pressure increases where the air hole 463 changes from smaller to larger. Greater wind pressure means a greater difference between the pressure on the windward and leeward sides of an object. This pressure difference is the direct driving force behind an object's movement. A greater pressure difference generates greater thrust. When this thrust is greater than forces hindering its motion, such as friction between the object and its support surface, the object is more easily moved. The wind pressure after the wind is blown out from the inclined hole 52 is increased, so that the fluorinated gypsum adhering to the surface of the scraping plate 51 can be blown off.

[0056] The two sides of the trapezoid gradually approach each other along a virtual straight line. The upper waistline of the two trapezoids is the first waistline, and the lower waistline is the second waistline. The angle between the first waistline and the horizontal line is greater than the angle between the second waistline and the horizontal line. This causes the air blown out of the inclined hole 52 to flow downward along the inclined surface of the scraper plate 51 (the inclined surface is tilted slightly; a larger angle weakens the airflow), making it more difficult for the crushed fluorgypsum powder to enter the inclined hole 52.

[0057] The air blown out of the inclined hole 52 not only helps to blow off the adhering fluorgypsum, but also provides a close-range hot air blow on the scooped fluorgypsum, thereby improving heating efficiency. The present invention covers any substitution, modification, equivalent method and solution made within the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without these detailed descriptions. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A powder-selecting device for crushing and selecting granular fluorgypsum, characterized in that: include: A motor (15), a bottom portion of a rotor (14) of the motor (15) is connected to a plurality of grinding rollers (16), the grinding rollers (16) are arranged in a wind box (12), a grinding ring (17) is arranged outside the grinding rollers (16), an analyzer (13) is arranged directly above the grinding rollers (16), and a plurality of scraper mechanisms (5) are installed below the grinding rollers (16), the scraper mechanisms (5) are used to scoop up materials and reduce the amount of materials adhering to the surface of the scraper plate (51); A hot air blower (32), the hot air blower (32) is connected to the wind box (12), a plurality of air guide plates (31) distributed in a circumferential direction are provided at the bottom of the wind box (12), a material distribution mechanism (4) is connected to the top of the air guide plates (31), and the material distribution mechanism (4) is used to control the number and position of the falling points of the material and to dry the material during the falling process; The material distribution mechanism (4) includes: a top plate (41), the top plate (41) is connected to the grinding ring (17) through a connecting ring (18), the top of the top plate (41) and the top of the connecting ring (18) and the top of the grinding ring (17) are located in the same plane, the top of the top plate (41) is penetrated by a plurality of first channels (47), the number of the first channels (47) matches the number of the plug-in boxes (21), the outer edge of the bottom of the top plate (41) is connected to the outer ring plate (42), the inner edge of the bottom of the top plate (41) is connected to the inner ring plate (43), and the outer ring plate (42) and the inner ring plate (43) are both hollow and truncated. The outer shell is provided with a cavity (44) between the outer ring plate (42) and the inner ring plate (43), and the outer ring plate (42) and the inner ring plate (43) form a material distribution box. The bottom of the material distribution box is provided with an outlet, and the cavity (44) is connected to the outlet. The side surface of the lower part of the material distribution box is provided with a plurality of placement openings (45) distributed in a circumferential direction. The placement openings (45) are arched, and each of the placement openings (45) is equipped with a drying material distribution piece (46). The outlet is provided between adjacent drying material distribution pieces (46). The drying material distribution piece (46) dries the material in the cavity (44) through the upstream hot air and distributes it to the adjacent outlet; The drying material dividing member (46) comprises: an upper arc plate (461), the upper arc plate (461) is connected to the placement opening (45), the upper arc plate (461) is adapted to the placement opening (45), a plurality of air holes (463) are provided on the top of the upper arc plate (461), the two ends of the upper arc plate (461) are connected to the end plates, the two ends of the upper arc plate (461) are connected to the lower arc plate (462) through the end plates, and the upper arc plate (461) is provided with a plurality of air holes (463) on the top of the upper arc plate (461), ... 1) A side plate (464) is connected to the side of the lower arc plate (462) close to the axis of the wind box (12), and the side plate (461) close to the axis of the wind box (12). The upper arc plate (461) and the lower arc plate (462) are both semicircular beam plates. The upper arc plate (461) and the lower arc plate (462) form a blanking plate. An air duct (465) is provided between the upper arc plate (461) and the lower arc plate (462), and the outlet is provided between adjacent upper arc plates (461).

2. The powder and granular fluorgypsum crushing and powder selection device according to claim 1, characterized in that: The top of the analyzer (13) is connected to the shell (11), and the side of the bottom of the shell (11) is connected to a plurality of plug-in boxes (21) equidistantly distributed in the circumferential direction, and a vertical hole (22) is provided through the top of each plug-in box (21), and a horizontal hole (23) is provided on the side of each plug-in box (21) away from the axis of the shell (11). The top of the vertical hole (22) is connected to a feed pipe (24), and the top of the vertical hole (22) is connected to a discharge pipe (25), and the horizontal hole (23) is connected to a plug-in plate (26), and the side of the plug-in plate (26) away from the shell (11) is connected to a handle (27), and the plug-in plate (26) is used to control the connection or closing of the discharge pipe (25) and the feed pipe (24).

3. The powder-separating device for crushing and selecting granular fluorgypsum according to claim 2, characterized in that: A first air cavity (34) is provided inside the air box (12), a second channel (62) is provided on the side of the air box (12), and an air duct of the hot air blower (32) is connected to the first air cavity (34) through the second channel (62). The scraper mechanism (5), the material distribution mechanism (4), the grinding roller (16), and the grinding ring (17) are all arranged in the air box (12). The analyzer (13) is used to screen the diameter of the upwardly blown powder. An air inlet (33) is provided between adjacent air guide plates (31). The bottom of the air guide plate (31) is connected to the bottom wall of the air box (12) through a bottom plate (19). A bottom groove (61) is provided on the top of the bottom plate (19). The scraper mechanism (5) is provided above the bottom groove (61). The fixed end of the scraper mechanism (5) close to the axis of the housing (11) is connected to the rotator (14). The side of the grinding ring (17) is connected to a connecting ring (18).

4. The powder and granular fluorgypsum crushing and powder selection device according to claim 3, characterized in that: The distance between the middle of the upper arc plate (461) and the bottom plate (19) is greater than the distance between the other parts of the upper arc plate (461) and the bottom plate (19), the top of the first channel (47) is connected to the bottom end of the discharge pipe (25) extending into the wind box (12), and the middle of each upper arc plate (461) is located directly below a first channel (47).

5. The powder-selecting device for crushing and selecting granular fluorgypsum according to claim 4, characterized in that: The scraper mechanism (5) comprises: a scraper plate (51), a fixed end of the scraper plate (51) is connected to the bottom of the rotator (14), the scraper plate (51) is arranged above the bottom groove (61), the material distribution mechanism (4) is located between the scraper plate (51) and the wind guide plate (31), baffles (53) are connected to both sides of the scraper plate (51), a second air cavity (54) is opened at the bottom of the scraper plate (51), and a plurality of inclined holes (52) are opened through the upper surface of the scraper plate (51), and the bottoms of the inclined holes (52) are connected to the second air cavity (54).

6. The powder-selecting device for crushing and selecting granular fluorgypsum according to claim 5, characterized in that: The longitudinal cross-section of the inclined hole (52) is a trapezoid, the lower base of the trapezoid is away from the baffle (53), the length of the lower base of the trapezoid is greater than the length of the upper base of the trapezoid, the two waists of the trapezoid gradually approach each other along a virtual straight line, the upper waistline of the two waistlines of the trapezoid is the first waistline, the lower waistline of the two waistlines of the trapezoid is the second waistline, and the angle between the first waistline and the horizontal line is greater than the angle between the second waistline and the horizontal line.

7. A process for crushing and selecting granular fluorspar, using the granular fluorspar crushing and selecting device according to claim 6, characterized in that: The fan blows hot air into the first air cavity (34), the second air cavity (54), the air inlet (33), and the cavity (44); the number of discharge channels is determined and the corresponding number of plug plates (26) are pulled out from the plug box (21) so that the feed pipe (24) is connected to the discharge pipe (25); the material falls onto the upper arc plate (461) through the discharge pipe (25), and the material on the upper arc plate (461) slides down along the arc surface to the bottom of both ends and slides into the bottom trough (61). The material in the upper arc plate (461) and the cavity (44) is The material is dried in the hot air; the motor (15) drives the grinding roller (16) to roll in the grinding ring (17), crushing, grinding the powdered fluorinated gypsum entering the grinding chamber, and the scraper plate (51) scoops up and throws the material. The inclined hole (52) is used to blow off the material adhering to the upper surface of the scraper plate (51) under the action of wind, so that it is fully crushed between the grinding roller (16) and the grinding ring (17); the upward wind blows the crushed material to the analyzer (13), and the analyzer (13) screens the diameter of the powder blown up.

Images