Granular fluorgypsum crushing and selecting device and process thereof

Abstract

The invention discloses a granular fluorgypsum crushing and selecting device and a process thereof, and relates to the technical field of fluorgypsum crushing. The granular fluorgypsum crushing and selecting device comprises a motor, a plurality of grinding rollers are connected to the bottom of a rotator of the motor, grinding rings are arranged outside the grinding rollers, an analyzer is arranged over the grinding rollers, and a scraper knife mechanism is used for shoveling materials and reducing the materials attached to the surface of a material shoveling plate; the material uniformizing mechanism is used for controlling the number of falling points and the positions of the falling points of the materials and drying the materials in the falling process. According to the granular fluorgypsum crushing and selecting device and the process thereof, a plurality of discharge ports capable of being closed are designed in the circumferential direction, the discharging amount at different positions is controlled through the number of the communicated discharge ports, a scraper knife plate and a drying and distributing piece are both communicated with an air box, and through the thermal action, drying of materials is completed, and the drying efficiency is improved. And the probability that humid materials are adhered to the scraper knife plate can be reduced, and the fluorgypsum crushing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluorogypsum crushing, and particularly relates to a powder-like fluorogypsum crushing and powder separating device and its process. Background Art

[0002] The powder-like fluorogypsum crushing and powder separating device drives the grinding roller to roll in the grinding ring through a motor, rolls, crushes and grinds the powder-like fluorogypsum entering the grinding chamber, combines with the design of a curved surface scraper to shovel and sprinkle the material, so that it is fully crushed between the grinding roller and the grinding ring, and the diameter of the upward blowing powder is screened by an analyzer.

[0003] Referring to Chinese Patent Publication No.: CN112473987A, a gypsum crushing device includes a support plate. The four circumferences of the bottom end of the support plate are respectively welded and connected with support columns, and the top end of the support plate is welded and connected with a crushing box. The top end of the crushing box is fitted and connected with a feed pipe. A first groove body is fixedly connected inside the support column, and a second groove body is welded and connected to one side of the support column. In the present invention, the device can crush larger pieces of gypsum into small pieces through two opposite crushing rollers, and then cooperate with a crushing and grinding disc to grind the gypsum into powder, improving the efficiency of crushing and grinding into powder. Through a blower, the heat in the auxiliary heating box can be blown into the crushing box to dry the gypsum, preventing moisture from being contained in the gypsum powder, resulting in wall sticking and agglomeration. Through an electric fan, the dust particles lifted in the crushing box can be inhaled into the dust storage box for storage, preventing the gypsum powder from being lifted out, making the device operate dust-free and more environmentally friendly.

[0004] When the humidity of the fluorogypsum material is relatively high, the gypsum material is prone to adhere to the surface of the scraper, and then accumulate and block the scraper. Especially for gypsum stored or transported in a humid environment, this situation is more likely to occur. For example, in the Chinese Patent Publication No., even when hot air is introduced, the materials are prone to adhere together. Compared with single fluorogypsum, usually only the outer layer of the fluorogypsum mass can be crushed in one-time crushing and grinding, and the inner layer still needs to be continuously crushed and ground, increasing the difficulty of crushing and grinding. Moreover, the wet materials are prone to adhere to the tools, especially the scraper that directly contacts the materials and has a large surface area. It is difficult to achieve fixed-point and effective cleaning only through the scattered hot air blown in. The fluorogypsum material falls into the crushing and grinding box body from one feed port. There is a lot of material at the material falling place, and less or even no material is contacted by the grinding rollers at other positions. However, the material receiving amount of each grinding roller cannot be adjusted, and the working efficiency of each grinding roller is not the same, and the working efficiency can be further improved. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a pulverizing and powder separating device and process for powdery and granular fluorogypsum, which are designed with a plurality of closable discharge ports in the circumferential direction, and the material discharge amount at different positions is controlled by the number of connected discharge ports. The scraper plate and the drying and distributing member are both communicated with the air box. Through the thermal effect, the drying of the material is completed, and the probability of wet material adhering to the scraper plate can be reduced, thereby improving the pulverizing efficiency of fluorogypsum.

[0006] Technical solution: To achieve the above object, the present invention is realized through the following technical solutions: A pulverizing and powder separating device for powdery and granular fluorogypsum, comprising: a motor, the bottom of the rotor of the motor is connected with a plurality of grinding rollers, the grinding rollers are arranged in an air box, a grinding ring is arranged outside the grinding rollers, an analyzer is arranged directly above the grinding rollers, and a plurality of scraper mechanisms are installed below the grinding rollers, and the scraper mechanisms are used to lift the material and reduce the material adhering to the surface of the scraper plate; A hot air blower, the hot air blower is communicated with the air box, a plurality of air guiding plates distributed in the circumferential direction are arranged at the bottom of the air box, and a material equalizing mechanism is connected to the top of the air guiding plates, and the material equalizing mechanism is used to control the number and position of the material dropping points and dry the material during the dropping process.

[0007] Preferably, the top of the analyzer is connected with a housing, the side of the bottom of the housing is connected with a plurality of insertion boxes equidistantly distributed in the circumferential direction, a vertical hole is opened through the top of each insertion box, a horizontal hole is opened on one side of each insertion box away from the axis of the housing, the top of the vertical hole is communicated with a feed pipe, the top of the vertical hole is communicated with a blanking pipe, an insertion plate is inserted into the horizontal hole, and a handle is connected to the side of the insertion plate away from the housing, and the insertion plate is used to control the communication or closing of the blanking pipe and the feed pipe.

[0008] Preferably, a first air cavity is opened inside the air box, a second channel is opened on the side of the air box, the air duct of the hot air blower is communicated with the first air cavity through the second channel, the scraper mechanism, the material equalizing mechanism, the grinding rollers and the grinding ring are all arranged in the air box, the analyzer is used to screen the diameter of the powder blown upwards, an air inlet is arranged between adjacent air guiding plates, the bottom of the air guiding plate is connected to the bottom wall of the air box through a bottom plate, a bottom groove is opened on the top of the bottom plate, the scraper mechanism is arranged above the bottom groove, the fixed end of the scraper mechanism close to the axis of the housing is connected to the rotor, and a connecting ring is connected to the side of the grinding ring.

[0009] Preferably, the material leveling mechanism includes: a top plate, which is connected to the grinding ring through a connecting ring. The top of the top plate, the top of the connecting ring, and the top of the grinding ring are on the same plane. A number of first channels are formed through the top plate. The number of the first channels matches the number of the cartridge cases. The outer edge of the bottom of the top plate is connected with an outer ring plate, and the inner edge of the bottom of the top plate is connected with an inner ring plate. Both the outer ring plate and the inner ring plate are hollow outer shells in the shape of a frustum of a cone. A cavity is arranged between the outer ring plate and the inner ring plate. The outer ring plate and the inner ring plate form a material leveling box. An outlet is arranged at the bottom of the material box. The cavity is communicated with the outlet. A number of placement openings distributed in the circumferential direction are formed through the side surface of the lower part of the material leveling box. The placement openings are arched. Each placement opening is provided with a drying and material distributing member. The outlet is arranged between adjacent drying and material distributing members. The drying and material distributing member dries the materials in the cavity through the upward hot air and disperses them to adjacent outlets.

[0010] Preferably, the drying and material distributing member includes: an upper arc plate, which is communicated with the placement opening and is adapted to the placement opening. A number of air holes are formed through the top of the upper arc plate. The two ends of the upper arc plate are connected with end plates. The two ends of the upper arc plate are connected with a lower arc plate through the end plates. The side of the upper arc plate close to the axis of the air box and the side of the lower arc plate close to the axis of the air box are jointly connected with a side plate. Both the upper arc plate and the lower arc plate are an arc-shaped strip plate. Both the upper arc plate and the lower arc plate are semi-circular beam plates. The upper arc plate and the lower arc plate form a blanking plate. A wind channel is arranged between the upper arc plate and the lower arc plate. The outlet is arranged between adjacent upper arc plates.

[0011] Preferably, the distance from the middle part 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 communicated with the bottom end of the blanking pipe extending into the air box. The middle part of each upper arc plate is located directly below a first channel.

[0012] Preferably, the shovel mechanism includes: a shovel plate, the fixed end of which is connected to the bottom of the rotator. The shovel plate is arranged above the bottom groove. The material leveling mechanism is located between the shovel plate and the air guiding plate. The two sides of the shovel plate are connected with baffles. A second air cavity is formed at the bottom of the shovel plate. A number of inclined holes are formed through the upper surface of the shovel plate and the bottom of the inclined holes is communicated with the second air cavity.

[0013] Preferably, the longitudinal sectional view of the inclined hole is trapezoidal. The lower bottom of the trapezoid is close to the baffle. The length of the lower bottom of the trapezoid is greater than the length of the upper bottom of the trapezoid. The two waists of the trapezoid gradually approach along a virtual straight line. The upper waist of the two waists of the trapezoid is the first waist line, and the lower waist of the two waists of the trapezoid is the second waist line. The included angle between the first waist line and the horizontal line is greater than the included angle between the second waist line and the horizontal line.

[0014] A pulverized and classified process for powdery and granular fluorogypsum, including a pulverized and classified device for powdery and granular fluorogypsum. The fan blows hot air into the first air chamber, the second air chamber, the air inlet, and the cavity; determine the number of blanking channels and pull out the corresponding number of plug plates from the plug box to connect the feed pipe and the blanking pipe; the material falls into the upper arc plate through the blanking pipe, and the material on the upper arc plate slides down along the arc surface to the bottoms at both ends and then slides into the bottom groove. The material on the upper arc plate and in the cavity is dried in the hot air; the motor drives the grinding roller to roll in the grinding ring to roll, crush and grind the powdery and granular fluorogypsum entering the grinding chamber. The scraper plate shovels up and scatters the material, and the inclined holes are used to blow off the material adhering to the upper surface of the scraper plate under the action of wind force to make it fully crushed between the grinding roller and the grinding ring; the upward blowing air blows the crushed material towards the analyzer, and the analyzer screens the diameter of the upward blown powder material.

[0015] Beneficial effects: The present invention provides a pulverized and classified device for powdery and granular fluorogypsum and its process. Compared with the prior art, it has the following beneficial effects: 1. Design multiple closable discharge ports in the circumferential direction, and control the blanking amount at different positions by the number of connected discharge ports. The scraper plate and the drying and distributing part are both connected to the air box. Through the action of hot air, while drying the material during the falling and sliding process of the material, the probability of wet material adhering to the scraper plate is reduced, and the pulverizing efficiency of fluorogypsum is improved.

[0016] 2. By setting multiple blanking channels, the material feeding from one point is changed to multiple equidistant feeding points arranged in the circumferential direction, and multiple feeding points feed materials simultaneously. For single feeding, the materials gather at one point, and the material amounts in different areas are different or even none. It is necessary to rotate to the feeding point to obtain sufficient materials, which reduces the crushing and grinding efficiency of the grinding roller. Moreover, there is a lot of material accumulation at the feeding point, and the working intensities of the scraper plate and the grinding roller are large, which is not conducive to long-term use. By dispersing the material amount falling per unit time at one feeding point to multiple falling positions, it can not only ensure that each grinding roller crushes and grinds an appropriate amount of fluorogypsum simultaneously, but also improve the pulverizing amount of fluorogypsum per unit time and improve the pulverizing efficiency.

[0017] 3. The height from the middle part of the upper arc plate to the bottom plate is greater than the height from other parts of the upper arc plate to the bottom plate. The middle part of the upper arc plate is directly opposite to the discharge pipe, and most of the materials fall on the middle part of the upper arc plate. The middle part of the upper arc plate is the highest point, and the fluorogypsum on the upper arc plate slides along the curved surface towards the two bottom ends of the upper arc plate. During the sliding process of the fluorogypsum along the upper arc plate, the air flowing out of the air holes blows towards the fluorogypsum and takes away the moisture on the surface of the fluorogypsum. The upper arc plate is set as a semi-circular plate, which converts the horizontal sliding path into a curved sliding path, increases the falling distance of the fluorogypsum, and improves the drying effect of the fluorogypsum.

[0018] 4. The longitudinal sectional view of the inclined hole is trapezoidal. The lower base of the trapezoid is close to the baffle, and the length of the lower base of the trapezoid is greater than the length of the upper base of the trapezoid, so that the air inlet area of the trapezoidal channel is larger than the air outlet area. When the wind flows from the place with a large air hole to the place with a small air hole, the air hole becomes smaller and the flow velocity v increases. According to Bernoulli's principle, the wind pressure increases at the place where the air hole changes from small to large, which improves the wind pressure after the wind blows out from the inclined hole and is convenient for blowing off the fluorine gypsum adhered to the surface of the shovel blade plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present application and, together with the specification, are further used to explain the principles of the present application and enable those skilled in the relevant art to implement and use the present application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a sectional schematic diagram of the present invention.

[0023] Figure 3 It is a separation diagram of the housing, the air box and the internal structures of the housing and the air box.

[0024] Figure 4 It is a structural schematic diagram of the housing and the air box.

[0025] Figure 5 It is a structural schematic diagram of the plug-in box.

[0026] Figure 6 It is Figure 3 The structural schematic diagram after removing the housing and the air box.

[0027] Figure 7 It is Figure 6 The structural schematic diagram after removing the analyzer, the rotating part and the hot air blower.

[0028] Figure 8 It is a structural schematic diagram of the material leveling mechanism and the shovel blade mechanism.

[0029] Figure 9 It is a structural schematic diagram of the material leveling mechanism.

[0030] Figure 10 It is an exploded view of the material leveling mechanism.

[0031] Figure 11 It is a structural schematic diagram of the drying and material distributing part.

[0032] Figure 12 It is a structural schematic diagram of the scraper mechanism.

[0033] Figure 13 It is a sectional schematic diagram of the scraper mechanism.

[0034] Figure 14 It is a structural schematic diagram of A.

[0035] The reference numerals in the figure are: 11, housing; 12, air box; 13, analyzer; 14, rotator; 15, motor; 16, grinding roller; 17, grinding ring; 18, connecting ring; 19, bottom plate; 21, insertion box; 22, vertical hole; 23, horizontal hole; 24, feed pipe; 25, discharge pipe; 26, insertion plate; 27, handle; 31, air guiding plate; 32, hot air blower; 33, air inlet; 34, first air cavity; 4, material leveling mechanism; 41, top plate; 42, outer ring plate; 43, inner ring plate; 44, cavity; 45, placement opening; 46, drying and material distributing part; 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 groove; 62, second channel; 63, hole channel.

[0036] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. Specific Embodiments

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0038] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0039] Embodiment 1: As Figure 1 - Figure 14As shown in the figure, an embodiment of the present invention provides a pulverized fluorogypsum pulverizing and separating device and its process, including: a motor 15, the bottom of the rotor 14 of the motor 15 is connected with a plurality of grinding rollers 16, the grinding rollers 16 are arranged in the air box 12, an abrasive ring 17 is arranged outside the grinding rollers 16, a hot air blower 32, the hot air blower 32 is communicated with the air box 12, the bottom of the air box 12 is provided with a plurality of air guiding plates 31 distributed in a circumferential direction, the top of the air guiding plates 31 is connected with a material equalizing mechanism 4, and the material equalizing mechanism 4 is used for controlling the number and position of the material dropping points and drying the material during the dropping process.

[0040] The top of the classifier 13 is connected with a housing 11, the side of the bottom of the housing 11 is connected with a plurality of insertion boxes 21 equally spaced in a circumferential direction, a vertical hole 22 is opened through the top of each insertion box 21, a horizontal hole 23 is opened on one side of each insertion box 21 away from the axis of the housing 11, the top of the vertical hole 22 is communicated with a feed pipe 24, the top of the vertical hole 22 is communicated with a blanking pipe 25, an insertion plate 26 is inserted into the horizontal hole 23, a handle 27 is connected to the side of the insertion plate 26 away from the housing 11, and the insertion plate 26 is used for controlling the communication or closing of the blanking pipe 25 and the feed pipe 24.

[0041] A first air cavity 34 is opened inside the air box 12, a second channel 62 is opened on the side of the air box 12, the air duct of the hot air blower 32 is communicated with the first air cavity 34 through the second channel 62, a shovel mechanism 5, a material equalizing mechanism 4, grinding rollers 16, and an abrasive ring 17 are all arranged in the air box 12, the classifier 13 is used for screening the diameter of the upward blown powder, an air inlet 33 is arranged between adjacent air guiding plates 31, the bottom of the air guiding plate 31 is connected with the bottom wall of the air box 12 through a bottom plate 19, a bottom groove 61 is opened on the top of the bottom plate 19, the shovel mechanism 5 is arranged above the bottom groove 61, the fixed end of the shovel mechanism 5 close to the axis of the housing 11 is connected with the rotor 14, and a connecting ring 18 is connected to the side of the abrasive ring 17.

[0042] The material leveling 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, the top of the connecting ring 18, and the top of the grinding ring 17 are on the same plane. A plurality of first channels 47 are formed through the top plate 41. The number of the first channels 47 matches the number of the cartridge cases 21. An outer ring plate 42 is connected to the outer edge of the bottom of the top plate 41, and an inner ring plate 43 is connected to the inner edge of the bottom of the top plate 41. Both the outer ring plate 42 and the inner ring plate 43 are hollow outer shells in the shape of a frustum of a cone. 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 leveling box. An outlet is provided at the bottom of the material leveling box. The cavity 44 is communicated with the outlet. A plurality of placement openings 45 distributed in the circumferential direction are formed through the side surface of the lower part of the material leveling box. The placement openings 45 are arched. A drying and material distributing member 46 is installed at each placement opening 45. The outlet is arranged between adjacent drying and material distributing members 46. The drying and material distributing member 46 dries the materials in the cavity 44 through the upward hot air and disperses them to adjacent outlets.

[0043] An air outlet pipe can be connected to the top of the material leveling box, and the air outlet pipe is used to discharge water vapor from the material leveling box.

[0044] The drying and material distributing member 46 includes: an upper arc plate 461. The upper arc plate 461 is communicated with the placement opening 45 and is adapted to the placement opening 45. A plurality of air holes 463 are formed through the top of the upper arc plate 461. End plates are connected to both ends of the upper arc plate 461. A lower arc plate 462 is connected to both ends of the upper arc plate 461 through the end plates. A side plate 464 is commonly connected to the side of the upper arc plate 461 close to the axis of the air box 12 and the side of the lower arc plate 462 close to the axis of the air box 12. Both the upper arc plate 461 and the lower arc plate 462 are an arc-shaped strip plate. Both the upper arc plate 461 and the lower arc plate 462 are semi-circular plate beams. 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. The outlet is arranged between adjacent upper arc plates 461.

[0045] The distance from the middle of the upper arc plate 461 to the bottom plate 19 is greater than the distance from other parts of the upper arc plate 461 to the bottom plate 19. The bottom of the blanking pipe 25 extends into the air box 12 and is communicated with the first channel 47. The middle of each upper arc plate 461 is located directly below a first channel 47.

[0046] A pulverized and separated process for powdery and granular fluorogypsum, including a pulverized and separated device for powdery and granular fluorogypsum. A blower blows hot air into the first air chamber 34, the second air chamber 54, the air inlet 33, and the cavity 44. Determine the number of material discharge channels and pull out the corresponding number of plug plates 26 from the plug box 21 to connect the feed pipe 24 and the material discharge pipe 25. The material falls into the upper arc plate 461 through the material discharge pipe 25, and the material on the upper arc plate 461 slides down along the arc surface to the bottoms at both ends and then slides into the bottom groove 61. The material on the upper arc plate 461 and in the cavity 44 is dried in the hot air. The motor 15 drives the grinding roller 16 to roll in the grinding ring 17 to roll, crush, and grind the powdery and granular fluorogypsum entering the grinding chamber. The scraper plate 51 shovels up and scatters the material, and the inclined holes 52 are used to blow off the material adhering to the upper surface of the scraper plate 51 under the action of wind force to fully crush it between the grinding roller 16 and the grinding ring 17. The upward blowing wind blows the crushed material to the analyzer 13, and the analyzer 13 screens the diameter of the upward blown powder material.

[0047] The material discharge channel refers to a channel composed of the feed pipe 24, the discharge pipe, and the plug box 21.

[0048] During use, start the hot air blower 32, and the hot air in the hot air blower 32 enters the first air chamber 34 of the air box 12 through a pipeline. The scraper plate 51 and the drying and distributing part 46 are arranged in the first air chamber 34. The bottom of the scraper plate 51 is provided with the second air chamber 54. The drying and distributing part 46 is composed of the upper arc plate 461, the lower arc plate 462, and the side plate 464 to form an open box body. An air duct 465 is arranged in the box body. The first air chamber 34 is respectively communicated with the second air chamber 54 and the air duct 465. The hot air in the air duct 465 enters the cavity 44 through the air holes 463 on the upper arc plate 461.

[0049] Determine the number of material discharge channels (the more material discharge channels are opened, the more fluorogypsum falls per unit time, and the higher the crushing efficiency). By setting multiple material discharge channels, the material feeding from one point is changed to multiple equidistant feeding points arranged along the circumferential direction, and multiple feeding points feed materials simultaneously. For single-point feeding, the materials gather at one point, and the materials in different areas can only be driven by the rotating scraper plate 51. The material amounts in different areas are different or even none. When the grinding roller 16 near the feeding point crushes and grinds more materials, the grinding rollers 16 at other positions crush and grind less or no materials, and they must rotate to the feeding point to obtain sufficient materials, reducing the crushing and grinding efficiency of the grinding roller 16. Moreover, there is a large accumulation of materials at the feeding point, and the working intensities of the scraper plate 51 and the grinding roller 16 are high, which is not conducive to long-term use. By dispersing the material amount falling per unit time at one feeding point to multiple falling positions (even appropriately increasing the material amount falling per unit time, determined according to the actual production needs and the strength of the crushing and grinding tools), it can not only ensure that each grinding roller 16 crushes and grinds an appropriate amount of fluorogypsum simultaneously, but also improve the amount of fluorogypsum crushed and ground per unit time, thereby improving the crushing efficiency.

[0050] After determining the blanking channel, open the plug board 26 from the plug box 21, then the feed pipe 24 and the discharge pipe in this blanking channel are connected. Put the material into the feed pipe 24 at the same time. The fluorogypsum 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 fluorogypsum, and the water vapor generated after heating is discharged from the air outlet pipe at the top of the material leveling box. The fluorogypsum falls onto the upper arc plate 461. The upper arc plate 461 is a semi-circular beam plate. The height from the middle of the upper arc plate 461 to the bottom plate 19 is greater than the height from other parts of the upper arc plate 461 to the bottom plate 19. The middle of the upper arc plate 461 is directly opposite to the discharge pipe, and most of the material falls on the middle of the upper arc plate 461. The middle of the upper arc plate 461 is the highest point, and the fluorogypsum on the upper arc plate 461 slides along the curve towards both bottom ends of the upper arc plate 461. During the process of the fluorogypsum sliding down along the upper arc plate 461, the wind flowing out of the air holes 463 blows on the fluorogypsum and takes away the moisture on the surface of the fluorogypsum. The upper arc plate 461 is set as a semi-circular plate, which converts the horizontal sliding path into a curved sliding path, increases the falling distance of the fluorogypsum, and improves the drying effect of the fluorogypsum.

[0051] Example 2: As Figure 1 - Figure 14 shown, the embodiment of the present invention provides a pulverizing and powder separating device for powdery and granular fluorogypsum. An analyzer 13 is arranged directly above the grinding roller 16, and a plurality of scraper mechanisms 5 are installed below the grinding roller 16. The scraper mechanism 5 is used to scoop up the material and reduce the material adhering to the surface of the scraping plate.

[0052] 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 leveling mechanism 4 is located between the scraper plate 51 and the air 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. A plurality of inclined holes 52 are penetrated through the upper surface of the scraper plate 51, and the bottom of the inclined holes 52 is communicated with the second air cavity 54.

[0053] The longitudinal sectional view of the inclined hole 52 is trapezoidal. The lower bottom of the trapezoid is close to the baffle 53. The length of the lower bottom of the trapezoid is greater than the length of the upper bottom of the trapezoid. The two waists of the trapezoid gradually approach along a virtual straight line. The upper waist of the two waists of the trapezoid is the first waist line, and the lower waist of the two waists of the trapezoid is the second waist line. The included angle between the first waist line and the horizontal line is greater than the included angle between the second waist line and the horizontal line.

[0054] During use, the scraper plate 51 shovels up the fluorogypsum and sprinkles it into the gap between the grinding roller 16 and the grinding ring 17. The grinding roller 16 and the grinding ring 17 are adapted to each other, and the grinding roller 16 crushes and grinds the fluorogypsum. However, the fluorogypsum particles are relatively fine and have a large specific surface area, making it easy to adsorb the surrounding moisture and other substances, thus generating a certain viscosity. On the other hand, the fluorogypsum may contain some impurities or soluble components, which will undergo a hydration reaction or form a viscous substance under certain conditions, further increasing its viscosity. When the humidity of the fluorogypsum is high (especially the fluorogypsum stored or transported in a humid environment), the fluorogypsum has a certain viscosity. When the scraper plate 51 contacts and shovels the fluorogypsum, the fluorogypsum (especially in clusters) is likely to adhere to the surface of the scraper plate 51. The scraper plate 51 cannot lift the fluorogypsum, and the fluorogypsum adhering to the surface of the scraper plate 51 will not only reduce the working performance of the scraper plate 51 (shoveling up and throwing objects), but also increase the overall weight of the scraper plate 51, increasing the load on the rotating components and raising the risk of damage to the rotating components. By providing inclined holes 52 penetrating through the surface of the scraper plate 51, the longitudinal cross-section of the inclined holes 52 is trapezoidal, the lower base of the trapezoid is close to the separation baffle 53, and the length of the lower base of the trapezoid is greater than the length of the upper base of the trapezoid, so that the inlet area of the trapezoidal channel is larger than the outlet area. When the wind flows from the place with a larger wind hole 463 to the place with a smaller wind hole 463, since air can be approximately regarded as an ideal fluid and remains at the same height h, according to the continuity equation A1v1 = A2v2 (A is the cross-sectional area and v is the flow velocity), when the wind hole 463 becomes smaller, the flow velocity v increases. Also, according to Bernoulli's principle, the wind pressure becomes larger at the place where the wind hole 463 changes from small to large. The greater the wind pressure, the greater the difference between the pressure on the windward side and the pressure on the leeward side of the object. This pressure difference is the direct driving force for moving the object, and the greater the pressure difference, the greater the generated thrust. When the thrust is greater than the forces that impede the movement of the object, such as the frictional force between the object and the support surface, the object is more easily blown. By increasing the wind pressure after the wind blows out from the inclined holes 52, it is convenient to blow off the fluorogypsum adhering to the surface of the scraper plate 51.

[0055] The two waists of the trapezoid gradually approach along a virtual straight line. The upper of the two waist lines of the trapezoid is the first waist line, and the lower upper of the two waist lines of the trapezoid is the second waist line. The angle between the first waist line and the horizontal line is greater than the angle between the second waist line and the horizontal line. This makes the wind blowing out from the inclined holes 52 flow downward along the inclined surface of the scraper plate 51 (the inclined angle of the inclined surface is small, otherwise, the blowing force of the wind will be weakened), which can increase the difficulty of the pulverized fluorogypsum powder entering the inclined holes 52.

[0056] The air blown out from the inclined hole 52 not only helps to blow off the adhered fluorogypsum, but also can blow hot air at close range to the shoveled fluorogypsum, improving the heating efficiency. The present invention covers any alternatives, modifications, equivalent methods and solutions made within the essence and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details have been described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, processes, flows, components and circuits, etc. have not been described in detail to avoid unnecessary confusion to the essence of the present invention.

[0057] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A powder-selecting device for crushing and selecting granular fluorinated gypsum, characterized in that: include: A motor (15), wherein the bottom of the rotor (14) of the motor (15) is connected to a plurality of grinding rollers (16), the grinding rollers (16) are arranged in the 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; A hot air blower (32), the hot air blower (32) being connected to the wind box (12), a plurality of air guide plates (31) distributed in a circumferential direction being provided at the bottom of the wind box (12), a material distribution mechanism (4) being connected to the top of the air guide plates (31), the material distribution mechanism (4) being used to control the number and position of the falling points of the material and to dry the material during its falling process.

2. The powder-granular fluorinated gypsum crushing and powder selection device according to claim 1 is characterized in that: The top of the analyzer (13) is connected to a 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 a circumferential direction, each of the plug-in boxes (21) is provided with a vertical hole (22) at the top, and each of the plug-in boxes (21) is provided with a horizontal hole (23) at a side away from the axis of the shell (11), the top of the vertical hole (22) is connected to a feed pipe (24), the top of the vertical hole (22) is connected to a discharge pipe (25), the horizontal hole (23) is connected to a plug-in plate (26), 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 fluorinated gypsum according to claim 1, characterized in that: A first air cavity (34) is provided inside the wind box (12), a second channel (62) is provided on the side of the wind 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 wind box (12). The analyzer (13) is used for screening the diameter of the powder material blown upward. 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 a bottom plate (19). A bottom groove (61) is provided on the top of the bottom plate (19). The scraper mechanism (5) is arranged 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), and a connecting ring (18) is connected to the side of the grinding ring (17).

4. The powder-separating device for crushing and selecting granular fluorinated gypsum according to claim 1, characterized in that: The material distribution mechanism (4) comprises: a top plate (41), the top plate (41) being connected to the grinding ring (17) via a connecting ring (18), the top of the top plate (41) being located in the same plane as the top of the connecting ring (18) and the top of the grinding ring (17), the top plate (41) having a plurality of first channels (47) extending through the top plate (41), the number of the first channels (47) matching the number of the plug-in boxes (21), the outer edge of the bottom of the top plate (41) being connected to an outer ring plate (42), the inner edge of the bottom of the top plate (41) being connected to an inner ring plate (43), the outer ring plate (42) and the inner ring plate (43) both being truncated cone-shaped. A hollow shell is provided, 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 penetrated through the side surface of the lower part of the material distribution box, the placement openings (45) are arched, each of the placement openings (45) is installed with a drying material distribution piece (46), the outlet is provided between adjacent drying material distribution pieces (46), and 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.

5. The powder-selecting device for crushing and selecting granular fluorinated gypsum according to claim 4, characterized in that: The drying material dividing member (46) comprises: an upper arc plate (461), the upper arc plate (461) being in communication with the placement opening (45), the upper arc plate (461) being adapted to the placement opening (45), a plurality of air holes (463) being formed through the top of the upper arc plate (461), end plates being connected at both ends of the upper arc plate (461), the lower arc plate (462) being connected at both ends of the upper arc plate (461) via the end plates, and a portion of the upper arc plate (461) close to the axis of the wind box (12) The upper arc plate (461) and the lower arc plate (462) are connected together with a side plate (464) on a side close to the axis of the wind box (12); the upper arc plate (461) and the lower arc plate (462) are both arc-shaped strip plates; 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 an outlet is provided between adjacent upper arc plates (461).

6. The powder-separating device for crushing and selecting granular fluorinated gypsum according to claim 5, 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 feed tube (25) extending into the wind box (12), and the middle of each upper arc plate (461) is located directly below a first channel (47).

7. The powder-separating device for crushing and selecting granular fluorinated gypsum according to claim 1, characterized in that: The scraper mechanism (5) comprises: a scraper plate (51), a fixed end of the scraper plate (51) being connected to the bottom of the rotator (14), the scraper plate (51) being arranged above the bottom groove (61), the material balancing mechanism (4) being located between the scraper plate (51) and the wind guide plate (31), baffles (53) being connected to both sides of the scraper plate (51), a second air cavity (54) being provided at the bottom of the scraper plate (51), and a plurality of inclined holes (52) being provided through the upper surface of the scraper plate (51), and the bottoms of the inclined holes (52) being connected to the second air cavity (54).

8. The powder-separating device for crushing and selecting granular fluorinated gypsum according to claim 7, characterized in that: The longitudinal cross-section of the inclined hole (52) is a trapezoid, the lower base of the trapezoid is close to 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 upper 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.

9. A powder-granular fluorinated gypsum crushing and powder-selecting process, using the powder-granular fluorinated gypsum crushing and powder-selecting device according to any one of claims 1 to 8, 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 a 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); 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 groove (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) to crush, pulverize and grind the powdered fluorinated gypsum entering the grinding chamber; 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 upwardly blown powder.

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