Bentonite circulating mill facilitating classification

Abstract

The application discloses a bentonite circulating mill convenient for grading, and belongs to the technical field of the mill.The existing vertical mill is used for screening bentonite particles by means of bottom air inlet and top screening, which not only needs large equipment investment, but also can only screen bentonite of one particle size at a time.The application realizes grading and screening of the ground material, and can screen the material of two particle sizes at a time without repeated grinding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of a flour mill, in particular to a bentonite circulating flour mill facilitating grading. BACKGROUND

[0002] The flour mill is widely used in the grinding of mineral products in the fields of metallurgy, building materials, chemical industry and mining. The mainstream flour mill on the market is composed of a main machine, an analyzer, a blower, a finished product cyclone separator, a pipeline device and a motor.

[0003] The mainstream vertical flour mill on the market screens bentonite particles by way of bottom air inlet and top screening, such as a Raymond flour mill. This method not only requires a large investment in equipment, but also can only screen one size of bentonite at a time. If two sizes of bentonite are needed, the grinding process needs to be repeated.

[0004] To solve the above problems, a bentonite circulating flour mill facilitating grading is proposed. SUMMARY

[0005] The present application aims to provide a bentonite circulating flour mill facilitating grading, which solves the problem that the existing vertical flour mill in the background art screens bentonite particles by way of bottom air inlet and top screening, which not only requires a large investment in equipment, but also can only screen one size of bentonite at a time.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a bentonite circulating flour mill facilitating grading, comprising a shell and a grinding assembly arranged inside the shell, further comprising a first screening assembly and a second screening assembly arranged inside the shell, the grinding assembly is used for grinding bentonite, the first screening assembly is used for preliminarily separating the ground bentonite, and the second screening assembly is used for secondarily separating the preliminarily separated bentonite, a cover plate is installed at the top of the shell, the grinding assembly comprises a grinding disc rotatably arranged inside the shell, and further comprises a grinding roller arranged inside the shell, the grinding disc and the grinding roller are used for grinding bentonite, the grinding roller is located on the upper surface of the grinding disc, a hydraulic device is fixedly connected to the top of the shell, the output end of the hydraulic device is rotatably connected with the grinding roller, the hydraulic device is used for adjusting the gap between the grinding roller and the upper surface of the grinding disc to control the grinding particle size, the middle part of the grinding disc is vertically penetrated, the first screening assembly comprises a first filter cylinder rotatably connected below the grinding disc, the first filter cylinder is used for screening the ground bentonite, and the first screening assembly further comprises a linkage mechanism uniformly distributed at the bottom of the grinding disc and the outer edge of the first filter cylinder, the linkage mechanism is used for transmission between the grinding disc and the first filter cylinder.

[0007] The second screening assembly comprises an inner shell arranged inside and below the outer shell, a second filtering mechanism is arranged rotatably inside the inner shell, the second filtering mechanism comprises two groups of symmetrical gear plates, and a second filtering cylinder is arranged between the two groups of gear plates, the second filtering cylinder is in a spiral shape, gaps exist between two edges of the second filtering cylinder, a circular hole for the bentonite to enter is arranged in the middle of the gear plate, and a space for screening is formed between the second filtering cylinder and the two groups of gear plates.

[0008] Further, the grinding assembly further comprises a feeding cylinder arranged above the outer shell, a first feeding pipe is arranged at the bottom of the four corners of the feeding cylinder, the first feeding pipe is fixedly connected with the cover plate, and the bottom of the first feeding pipe extends to the inside of the outer shell and corresponds to the upper side of the grinding turntable.

[0009] Further, the outer edge of the grinding turntable is fixedly connected with an outer baffle, and the outer edge of the outer baffle is provided with an outer tooth groove.

[0010] Further, the grinding assembly further comprises a first motor arranged on the outer wall of the outer shell, a gear is fixedly connected to the output end of the first motor, and the gear is in meshing connection with the outer tooth groove.

[0011] Further, the grinding assembly further comprises a discharging scraper arranged above the grinding turntable, a first telescopic cylinder is fixedly connected to the top of the cover plate, the output end of the first telescopic cylinder extends to the inside of the outer shell and is fixedly connected with the discharging scraper, and the discharging scraper is arranged in an inclined manner.

[0012] Further, the top of the first filtering cylinder is provided with a concave groove, and a filter screen is arranged at the bottom of the groove, the groove is used for accommodating the bentonite scraped off by the discharging scraper, and the filter screen is used for screening the bentonite.

[0013] Further, the linkage mechanism comprises a fixed frame fixedly connected to the inner wall of the outer shell, a first fixed plate is fixedly connected to the other end of the fixed frame, a second fixed plate is fixedly connected to the bottom of the first filtering cylinder, a first return spring is arranged between the second fixed plate and the first fixed plate, a limiting groove is arranged on the outer wall of the first filtering cylinder, a second extrusion block is slidably connected in the limiting groove, a compression spring is arranged between the inner side of the second extrusion block and the limiting groove, the linkage mechanism further comprises a pushing block fixedly connected to the bottom of the grinding turntable, and a first extrusion block is fixedly connected to the inner wall of the outer shell, wherein the first extrusion block, the pushing block and the second extrusion block are all in the shape of a trapezoid, and the inclined surface of the second fixed plate corresponds to the inclined surface of the second extrusion block.

[0014] Further, the first screening assembly further comprises a return plate, four groups of return plates are distributed in a radial direction, a second telescopic cylinder is fixedly connected to the top of the cover plate, the output end of the second telescopic cylinder extends to the inside of the outer shell and is fixedly connected with the return plate through a connecting frame, the return plate has a certain inclination, and the return plate is arranged in a suspended manner in the groove above the inside of the grinding turntable.

[0015] Further, the top of the inner shell is provided with a collection plate, the collection plate is V-shaped in cross section, and the primary screened bentonite can be collected, the second screening assembly further comprises a second feeding pipe arranged outside the gear plate, the top of the second feeding pipe penetrates the collection plate, the second feeding pipe is rotationally connected with the gear plate, the second screening assembly further comprises a driving mechanism, the driving mechanism comprises a second motor fixedly connected outside one of the second feeding pipes, a rotating shaft is fixedly connected to the output end of the second motor, the rotating shaft penetrates the second feeding pipe and the feeding port in a transverse direction, a rotating frame is fixedly connected to the rotating shaft, and the rotating frame is fixedly connected to the inner wall of the second filter cylinder.

[0016] Further, the inner shell is further provided with a discharge hopper below the inner shell, the discharge hopper is slidably connected to the inner shell, the two sides of the inner shell are fixedly connected with fixing blocks, the second return springs are arranged between the fixing blocks and the inner wall of the inner shell, the inner side of the discharge hopper is provided with a groove, a rack is arranged in the middle of the groove, and the rack is engaged with the gear plate, the second screening assembly further comprises a first discharge pipe and a second discharge pipe, the first discharge pipe and the second discharge pipe are arranged below the discharge hopper, and one end of the first discharge pipe and the second discharge pipe extends to the outside of the outer shell.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] The bentonite circulating mill convenient for grading provided by the present application has the following advantages: the crushed bentonite raw material is conveyed to the grinding turntable through the feeding cylinder, the grinding turntable is driven to rotate by the first motor, and grinding is performed under the action of the grinding roller, then the ground material is scraped to the first filter cylinder by the downwardly inclined discharging scraper, the first filter cylinder reciprocatingly rotates and swings to perform screening under the action of the linkage mechanism, the large-particle material screened out is moved back to the grinding turntable by the upward lifting of the return plate to be re-ground, the screened material enters the second filter mechanism through the second feeding pipe, fine material is discharged through the second discharge pipe under the action of the driving mechanism, and material with a slightly larger diameter is discharged from the first discharge pipe through the discharge hopper from the gap of the second filter cylinder, so that the ground material is classified and screened, two kinds of particle sizes of material can be screened at one time, repeated grinding is not needed, the overall equipment is simple, and investment is low. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a split diagram of the overall structure of the present application;

[0021] Figure 3 It is a split diagram of the grinding assembly structure of the present application;

[0022] Figure 4Structure diagram of the grinding assembly and the first screening assembly of the present application;

[0023] Figure 5 Structure exploded view of the linkage mechanism of the present application;

[0024] Figure 6 Structure diagram of the second screening assembly of the present application;

[0025] Figure 7 Structure sectional view of the second screening assembly of the present application;

[0026] Figure 8 Structure exploded view of the second screening assembly of the present application;

[0027] Figure 9 Structure exploded view of the second screening assembly of the present application.

[0028] In the figure: 1, outer shell; 11, cover plate; 2, grinding assembly; 21, feeding cylinder; 211, first feeding pipe; 22, grinding rotating disc; 221, outer baffle; 222, outer tooth groove; 23, first motor; 24, grinding roller; 241, hydraulic device; 25, discharging scraper; 251, first telescopic cylinder; 3, first screening assembly; 31, linkage mechanism; 311, fixed frame; 312, first fixed plate; 313, second fixed plate; 314, first return spring; 315, first extrusion block; 316, shifting block; 317, second extrusion block; 318, compression spring; 32, first filtering cylinder; 321, filtering screen; 322, limiting groove; 33, material returning plate; 331, second telescopic cylinder; 332, connecting frame; 4, second screening assembly; 41, inner shell; 411, collecting plate; 42, second filtering mechanism; 421, second filtering cylinder; 422, gear disc; 423, feeding port; 43, driving mechanism; 431, second motor; 432, rotating shaft; 433, rotating frame; 44, second feeding pipe; 45, discharging hopper; 451, recess; 452, rack; 453, fixed block; 454, second return spring; 46, first discharging pipe; 47, second discharging pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0030] To solve the existing vertical flour mill is through the bottom of the air, the top of the screening method of bentonite particles for screening, this way not only equipment investment, and only one size of the particle size of bentonite screening technology problem, such as Figures 1-9 As shown in the following preferred technical solutions are provided:

[0031] A bentonite circulating mill convenient for grading, comprising a shell 1 and a grinding assembly 2 arranged inside the shell 1, further comprising a first screening assembly 3 and a second screening assembly 4 arranged inside the shell 1, the grinding assembly 2 is used for grinding bentonite, the first screening assembly 3 is used for preliminary separation of the ground bentonite, and the second screening assembly 4 is used for secondary separation of the preliminary separated bentonite, a cover plate 11 is installed at the top of the shell 1, the grinding assembly 2 comprises a grinding turntable 22 rotatably arranged inside the shell 1, and a grinding roller 24 arranged inside the shell 1, the grinding turntable 22 and the grinding roller 24 are used for grinding bentonite, and the grinding roller 24 is located on the upper surface of the grinding turntable 22, a hydraulic device 241 is fixedly connected to the top of the shell 1, the output end of the hydraulic device 241 is rotatably connected with the grinding roller 24, and the hydraulic device 241 is used for adjusting the gap between the grinding roller 24 and the upper surface of the grinding turntable 22 to control the grinding particle size, the middle part of the grinding turntable 22 is vertically penetrated, the first screening assembly 3 comprises a first filter cylinder 32 rotatably connected below the grinding turntable 22, the first filter cylinder 32 is used for screening the ground bentonite, and the first screening assembly 3 further comprises a linkage mechanism 31 uniformly distributed at the bottom of the grinding turntable 22 and the outer edge of the first filter cylinder 32, the linkage mechanism 31 is used for transmission between the grinding turntable 22 and the first filter cylinder 32.

[0032] The second screening assembly 4 comprises an inner shell 41 arranged below the inside of the shell 1, a second filter mechanism 42 is rotatably arranged inside the inner shell 41, the second filter mechanism 42 comprises two groups of symmetrical gear plates 422 and a second filter cylinder 421 arranged between the two groups of gear plates 422, the second filter cylinder 421 is in the shape of a scroll, and there is a gap between the two edges of the second filter cylinder 421, the middle part of the gear plate 422 is provided with a circular hole for the bentonite to enter, and the second filter cylinder 421 and the two groups of gear plates 422 form a space for screening.

[0033] The grinding assembly 2 further comprises a feeding cylinder 21 arranged above the outside of the shell 1, a first feeding pipe 211 is arranged at the bottom of the four corners of the feeding cylinder 21, the first feeding pipe 211 is fixedly connected with the cover plate 11, and the bottom of the first feeding pipe 211 extends to the inside of the shell 1 and corresponds to the upper side of the grinding turntable 22, the bentonite raw material is uniformly added in the inside of the feeding cylinder 21, the bentonite raw material falls on the rotating grinding turntable 22 through the first feeding pipe 211, and is ground under the action of the rotation of the grinding turntable 22 and the grinding roller 24.

[0034] The outer edge of the grinding turntable 22 is fixedly provided with an outer baffle 221, and the outer edge of the outer baffle 221 is provided with an outer tooth groove 222.

[0035] The grinding assembly 2 further comprises a first motor 23 arranged on the outer wall of the shell 1, and the output end of the first motor 23 is fixedly connected with a gear which is in meshing connection with the outer tooth groove 222, so that the grinding turntable 22 can be driven to rotate by the first motor 23. Figure 3 As shown in the figure, the grinding turntable 22 rotates clockwise.

[0036] The grinding assembly 2 further comprises a discharging scraper 25 arranged above the grinding turntable 22, and the top of the cover plate 11 is fixedly connected with a first telescopic cylinder 251, the output end of which extends into the interior of the shell 1 and is fixedly connected with the discharging scraper 25, wherein the discharging scraper 25 is arranged obliquely, and when the grinding turntable 22 rotates, the first telescopic cylinder 251 extends to make the discharging scraper 25 adhere to the upper surface of the grinding turntable 22, so as to block the ground bentonite and make it fall into the interior of the first filter cylinder 32.

[0037] The top of the first filter cylinder 32 is provided with a concave groove, and the bottom of the groove is provided with a filter screen 321, the groove is used to accommodate the bentonite scraped off by the discharging scraper 25, and the filter screen 321 is used to screen the bentonite.

[0038] The linkage mechanism 31 comprises a fixed frame 311 fixedly connected to the inner wall of the shell 1, a first fixed plate 312 fixedly connected to the other end of the fixed frame 311, a second fixed plate 313 fixedly connected to the bottom of the first filter cylinder 32, a first return spring 314 installed between the first fixed plate 312 and the second fixed plate 313, a limiting groove 322 provided on the outer wall of the first filter cylinder 32, a second extrusion block 317 slidably connected in the limiting groove 322, a compression spring 318 installed between the inner side of the second extrusion block 317 and the limiting groove 322, and a push block 316 fixedly connected to the bottom of the grinding turntable 22, and the inner wall of the shell 1 is further fixedly connected with a first extrusion block 315, wherein the first extrusion block 315, the push block 316 and the second extrusion block 317 are all trapezoidal in cross section, the inclined surface of the second fixed plate 313 corresponds to the inclined surface of the second extrusion block 317, when the grinding turntable 22 rotates, the push block 316 at the bottom of the grinding turntable 22 is driven to rotate, the second extrusion block 317 is driven to rotate by the push block 316, the first return spring 314 is compressed and stored in energy when the first filter cylinder 32 rotates, when the inclined surface of the second extrusion block 317 contacts the inclined surface of the first extrusion block 315 during the rotation of the first filter cylinder 32, the second extrusion block 317 is forced to retract into the limiting groove 322, at this time, the second extrusion block 317 is separated from the push block 316, the second extrusion block 317 is no longer driven by the push block 316, and reversely rebounds in the process of energy release of the first return spring 314, in this process, the first filter cylinder 32 is in a process of forward and reverse swinging, and the bentonite in the upper groove inside the first filter cylinder 32 is screened in this process.

[0039] The first screening assembly 3 further comprises a material return plate 33, the material return plate 33 is radially distributed with four groups, a second telescopic cylinder 331 is fixedly connected to the top of the cover plate 11, the output end of the second telescopic cylinder 331 extends to the inside of the shell 1 and is fixedly connected with the material return plate 33 through a connecting frame 332, and the material return plate 33 has a certain inclination, the material return plate 33 is suspended in the groove above the inside of the grinding turntable 22, and when the second telescopic cylinder 331 retracts, the large particle bentonite above the grinding turntable 22 can be lifted to fall in the grinding turntable 22 for regrinding.

[0040] The inner shell 41 has a collecting plate 411 on its top. The collecting plate 411 has a V-shaped cross-section and can collect the bentonite from the initial screening. The second screening assembly 4 also includes a second feed pipe 44 located outside the gear disk 422. The top of the second feed pipe 44 passes through the collecting plate 411 and is rotatably connected to the gear disk 422. The second screening assembly 4 also includes a drive mechanism 43. The drive mechanism 43 includes a second motor 431 fixedly connected to the outside of one of the second feed pipes 44. The output end of the second motor 431... A rotating shaft 432 is fixedly connected and extends laterally through the second feed pipe 44 and the feed inlet 423. A rotating frame 433 is fixedly connected to the rotating shaft 432 and is fixedly connected to the inner wall of the second filter cylinder 421. The second motor 431, the rotating shaft 432 and the rotating frame 433 can drive the second filter cylinder 421 and the gear disk 422 to rotate. The material initially screened can enter the space between the second filter cylinder 421 and the gear disk 422 through the second feed pipe 44 and the feed inlet 423.

[0041] A discharge hopper 45 is also provided below the inner shell 41. The discharge hopper 45 is laterally slidably connected to the inside of the inner shell 41. Fixing blocks 453 are fixedly connected to both sides of the inner shell 41. A second return spring 454 is installed between the fixing blocks 453 and the inner wall of the inner shell 41. A groove 451 is provided on the inner side of the discharge hopper 45. A rack 452 is installed in the middle of the groove 451, and the rack 452 meshes with the gear disk 422. The second screening assembly 4 also includes a first discharge pipe 46 and a second discharge pipe 47. The first discharge pipe 46 and the second discharge pipe 47 are located below the discharge hopper 45, and one end of the first discharge pipe 46 and the second discharge pipe 47 extends to the outside of the outer shell 1. Figure 8 As shown, when the drive mechanism 43 drives the second filter mechanism 42 to rotate counterclockwise, the bentonite inside the second filter mechanism 42 can only fall through the sieve holes on the second filter mechanism 42. When the second filter mechanism 42 rotates counterclockwise, the discharge hopper 45 moves to the right and corresponds to the second discharge pipe 47. When the drive mechanism 43 drives the second filter mechanism 42 to rotate clockwise, the large particles of bentonite inside the second filter mechanism 42 can be discharged from the gaps at both ends of the second filter mechanism 42. When the second filter mechanism 42 rotates clockwise, the discharge hopper 45 moves to the left and corresponds to the first discharge pipe 46.

[0042] Specific, by feeding cylinder 21 will be crushed bentonite raw material transported to the grinding disc 22, by the first motor 23 driven grinding disc 22 rotation, under the action of grinding roller 24, grinding, then by the inclined discharge scraper 25 will be scraped to the first filter cylinder 32 in the linkage mechanism 31, under the action of reciprocating rotation of the first filter cylinder 32 swing screening, screening left behind the large particles of material by back plate 33 of the upper tip to return to the grinding disc 22 re-grinding, screened material through the second feed pipe 44 into the second filter mechanism 42 inside, under the action of driving mechanism 43, fine material through the second discharge pipe 47 discharge, slightly larger diameter of material from the second filter cylinder 421 gap through the discharge hopper 45 from the first discharge pipe 46 discharge.

[0043] It should be noted that in this text, such as the first and second relationship terms are only used to distinguish one entity or operation with another entity or operation, and does not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in such process, method, article or equipment.

[0044] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled in the art within the scope of the present application disclosed in the technology, according to the technical scheme of the present application and its inventive concept to make equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A bentonite circulating grinding mill for easy grading, comprising a shell (1) and a grinding assembly (2) disposed inside the shell (1), and further comprising a first screening assembly (3) and a second screening assembly (4) disposed inside the shell (1), characterized in that: The grinding assembly (2) is used to grind bentonite, the first screening assembly (3) is used to perform preliminary separation of the ground bentonite, and the second screening assembly (4) is used to perform secondary separation of the preliminarily separated bentonite. A cover plate (11) is installed on the top of the outer shell (1). The grinding assembly (2) includes a grinding disc (22) rotatably disposed inside the outer shell (1) and a grinding roller (24) disposed inside the outer shell (1). The grinding disc (22) and the grinding roller (24) are used to grind the bentonite, and the grinding roller (24) is located on the upper surface of the grinding disc (22). A hydraulic device (241) is fixedly connected to the top of the outer shell (1). The output end is rotatably connected to the grinding roller (24). The hydraulic device (241) is used to adjust the gap between the grinding roller (24) and the upper surface of the grinding turntable (22) to control the grinding particle size. The middle part of the grinding turntable (22) is open from top to bottom. The first screening component (3) includes a first filter cylinder (32) rotatably connected below the grinding turntable (22). The first filter cylinder (32) is used to screen the ground bentonite. The first screening component (3) also includes a linkage mechanism (31) evenly distributed at the bottom of the grinding turntable (22) and the outer edge of the first filter cylinder (32). The linkage mechanism (31) is used for transmission between the grinding turntable (22) and the first filter cylinder (32). The second screening component (4) includes an inner shell (41) disposed below the interior of the outer shell (1). A second filter mechanism (42) is rotatably disposed inside the inner shell (41). The second filter mechanism (42) includes two sets of gear disks (422) symmetrically distributed, and a second filter cylinder (421) installed between the two sets of gear disks (422). The second filter cylinder (421) is spiral-shaped, and there is a gap between the two edges of the second filter cylinder (421). A round hole for bentonite to enter is provided in the middle of the gear disk (422). A screening space is formed between the second filter cylinder (421) and the two sets of gear disks (422). The linkage mechanism (31) includes a fixed frame (311) fixedly connected to the inner wall of the outer shell (1), a first fixed plate (312) fixedly connected to the other end of the fixed frame (311), a second fixed plate (313) fixedly connected to the bottom of the first filter cylinder (32), a first return spring (314) installed between the second fixed plate (313) and the first fixed plate (312), a limit groove (322) provided on the outer wall of the first filter cylinder (32), and a second pressing block (314) slidably connected in the limit groove (322). 17) A compression spring (318) is installed between the inner side of the second extrusion block (317) and the limiting groove (322). The linkage mechanism (31) also includes a paddle (316) fixedly connected to the bottom of the grinding turntable (22). A first extrusion block (315) is also fixedly connected to the inner wall of the outer shell (1). The cross-sections of the first extrusion block (315), the paddle (316) and the second extrusion block (317) are all trapezoidal. The inclined surface of the second fixing plate (313) corresponds to the inclined surface of the second extrusion block (317). The top of the inner shell (41) is provided with a collecting plate (411), which has a V-shaped cross section and can collect the bentonite that was screened in the first stage. The second screening component (4) also includes a second feed pipe (44) located outside the gear disk (422). The top of the second feed pipe (44) passes through the collecting plate (411), and the second feed pipe (44) is rotatably connected to the gear disk (422). The second screening component (4) also includes a drive mechanism (43), which includes a second motor (431) fixedly connected to the outside of one of the second feed pipes (44). The output end of the second motor (431) is fixedly connected to a rotating shaft (432), and the rotating shaft (432) passes laterally through the second feed pipe (44) and the feed inlet (423). A rotating frame (433) is fixedly connected to the rotating shaft (432), and the rotating frame (433) is fixedly connected to the inner wall of the second filter cylinder (421). A discharge hopper (45) is also provided at the bottom of the inner shell (41). The discharge hopper (45) is slidably connected to the inside of the inner shell (41). Fixed blocks (453) are fixedly connected to both sides of the inner shell (41). A second reset spring (454) is installed between the fixed blocks (453) and the inner wall of the inner shell (41). A groove (451) is provided on the inner side of the discharge hopper (45). A rack (452) is installed in the middle of the groove (451). The rack (452) meshes with the gear disk (422). The second screening component (4) also includes a first discharge pipe (46) and a second discharge pipe (47). The first discharge pipe (46) and the second discharge pipe (47) are located below the discharge hopper (45). One end of the first discharge pipe (46) and the second discharge pipe (47) extends to the outside of the outer shell (1).

2. The bentonite circulating grinding mill for easy classification as described in claim 1, characterized in that: The grinding assembly (2) also includes a feed cylinder (21) disposed above the outside of the housing (1). A first feed pipe (211) is installed at the four corners of the bottom of the feed cylinder (21). The first feed pipe (211) is fixedly connected to the cover plate (11), and the bottom of the first feed pipe (211) extends into the inside of the housing (1) and corresponds to the top of the grinding turntable (22).

3. A bentonite circulating grinding mill for easy classification as described in claim 1, characterized in that: An outer baffle (221) is fixedly installed on the outer edge of the grinding turntable (22), and an outer tooth groove (222) is provided on the outer edge of the outer baffle (221).

4. A bentonite circulating grinding mill for easy classification as described in claim 3, characterized in that: The grinding assembly (2) also includes a first motor (23) disposed on the outer wall of the housing (1), the output end of the first motor (23) is fixedly connected to a gear, and the gear meshes with the outer tooth groove (222).

5. A bentonite circulating grinding mill for easy classification as described in claim 1, characterized in that: The grinding assembly (2) also includes a scraper (25) disposed above the grinding turntable (22). A first telescopic cylinder (251) is fixedly connected to the top of the cover plate (11). The output end of the first telescopic cylinder (251) extends into the housing (1) and is fixedly connected to the scraper (25), wherein the scraper (25) is inclined.

6. A bentonite circulating grinding mill for easy classification as described in claim 5, characterized in that: The top of the first filter cylinder (32) is provided with a concave groove, and the bottom of the groove is provided with a filter screen (321). The groove is used to accommodate the bentonite scraped off by the feed scraper (25), and the filter screen (321) is used to screen the bentonite.

7. A bentonite circulating grinding mill for easy classification as described in claim 6, characterized in that: The first screening component (3) also includes a return plate (33). There are four sets of return plates (33) radially distributed. A second telescopic cylinder (331) is fixedly connected to the top center of the cover plate (11). The output end of the second telescopic cylinder (331) extends into the interior of the outer shell (1) and is fixedly connected to the return plate (33) through the connecting frame (332). The return plate (33) has a certain inclination. The return plate (33) is suspended in the groove above the inside of the grinding turntable (22).

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