Circulating opposite-grinding type kaolin refining grinder

Abstract

The invention discloses a circulating opposite-grinding type kaolin refining grinder which comprises a grinding box and opposite-grinding rollers rotationally mounted on the inner side of the top of the grinding box and further comprises an outer frame, the outer frame is arranged on the inner side of the top end of the grinding box, and a partition net of a grid-shaped structure is fixedly mounted on the inner side of the outer frame; the outer frame is installed on the inner side of the top end of the grinding box in an up-down sliding mode. The screen is obliquely arranged below the opposite grinding rollers, the bottom of the screen is detachably installed on the top face of a fixing frame, and the fixing frame is installed in the middle of the inner side of the grinding box in an up-down sliding mode; a second shaft rod rotationally connected to the middle of the grinding box is arranged below the fixing frame. According to the circulating opposite-grinding type kaolin refining grinder, blocky kaolin can be pre-crushed, circulating grinding and filtering of the kaolin are facilitated, automatic screening can be achieved, flying dust can be reduced, direct drying can be achieved, and the kaolin grinding treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field related to kaolin, and more particularly to the technical field of kaolin grinding, in particular to a circulating rolling type kaolin refining grinding machine. Background Art

[0002] Kaolin minerals are composed of kaolinite, dickite, perlite, halloysite and other kaolinite cluster minerals, with kaolinite as the main mineral component. Kaolin has plasticity, wet soil can be molded into various shapes without breaking, and can remain unchanged for a long time. Kaolin has become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, medicine and national defense. Before kaolin is reused, it needs to be finely ground. For example, the invention with the authorization announcement number CN 112221598 B relates to a method for preparing kaolin, including a bottom plate, a holding device, a grinding device and a collecting frame, wherein the holding device is installed on the upper end of the bottom plate, and the grinding device is arranged above the holding device. The present invention can solve the problems that the existing equipment cannot vibrate when grinding kaolin for preparing wet kaolin, and the kaolin during grinding is prone to compaction, resulting in the inability to grind the kaolin, reducing the grinding efficiency, and the kaolin with a larger volume cannot be retained when the kaolin is discharged, resulting in uneven kaolin after grinding. At the same time, the kaolin cannot be reciprocated and the kaolin stuck on the equipment is scraped off, resulting in a waste of kaolin, and the wet kaolin cannot be dried while being ground, thereby increasing the working steps and reducing the efficiency of kaolin preparation. For another example, the invention with application publication number CN 114505162 A discloses a kaolin stirring and grinding device, which includes: a box body, which is provided with a working chamber, and is provided with a kaolin input structure and a kaolin output structure, the kaolin input structure is located at the upper end of the box body, and the kaolin output structure is located at the lower end of the box body; a three-dimensional stirring device, which is provided in the working chamber and is used to stir the kaolin; a grinding device, which is provided in the working chamber and is located below the three-dimensional stirring device; a partition structure, which is provided between the three-dimensional stirring device and the grinding device and is used to adjust the amount of kaolin entering the grinding device; a filtering structure, which is provided below the grinding device and is used to filter the ground kaolin; a conveying device, the lower end of which is connected to the filtering structure and the upper end of which is connected to the upper space of the partition structure; and a control component, which is electrically connected to the three-dimensional stirring device, the grinding device, the partition structure, the filtering structure and the conveying device. The kaolin stirring and grinding device proposed in the technical solution of the present invention can fully grind the kaolin; Combined with the actual grinding process of kaolin, the current kaolin grinding operation still has certain disadvantages, such as: The general kaolin grinding device cannot pre-crush the kaolin to be ground, which is not conducive to improving the grinding efficiency of kaolin. Common kaolin grinding devices cannot perform cyclic operations, which is not conducive to ensuring the filtration and screening requirements of kaolin; Most kaolin grinding devices are unable to quickly transport kaolin, and will generate a large amount of dust during the grinding operation, affecting the working environment.

[0003] Therefore, we propose a circulating rolling type kaolin refining grinder to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a circulating rolling type kaolin refining grinder to solve the problems mentioned in the above background technology that the current kaolin grinder is not conducive to improving the grinding efficiency of kaolin, is not conducive to reducing dust, and affects the working environment.

[0005] To achieve the above object, the present invention provides the following technical solution: a circulating double-rolling kaolin fine grinding machine, comprising: a grinding box and double-rolling rollers rotatably mounted on the inner side of the top of the grinding box, and also comprising: An outer frame, the outer frame is arranged on the inner side of the top of the grinding box, and a grid-shaped partition is fixedly installed on the inner side of the outer frame, and the outer frame is slidably installed up and down on the inner side of the top of the grinding box; A screen, the screen is obliquely arranged below the grinding rollers, the bottom of the screen is detachably mounted on the top surface of a fixing frame, and the fixing frame is slidably mounted on the inner middle of the grinding box; Wherein, a second shaft rod rotatably connected to the middle part of the grinding box is arranged below the fixed frame, the second shaft rod is arranged parallel to the screen, a vertical rod is vertically fixed downward in the middle part of the second shaft rod, and a receiving plate with an arc-shaped structure is fixed at the bottom end of the vertical rod; A material receiving box, the material receiving box is arranged on the left side of the grinding box, a feeding pipe is vertically arranged inside the material receiving box, a feeding auger is installed inside the feeding pipe, a second fan is arranged outside the feeding pipe, and an output end of the second fan extends obliquely downward into the inside of the feeding pipe; A concentrating plate is symmetrically fixed on the bottom of the grinding box, the middle part of the concentrating plate is enclosed to form a discharge trough, a discharge pipe connected to the right side of the grinding box is arranged on the right side of the discharge trough, a discharge auger is arranged on the inner side of the discharge trough, a first fan is installed on the top of the discharge pipe, and the output end of the first fan extends obliquely into the interior of the discharge pipe through the blowing pipe.

[0006] Preferably, a motor is connected to the top end of the pair of rollers, and a plurality of groups of the pair of rollers are arranged at equal intervals on the inner side of the grinding box, and connecting gears meshing in sequence are fixed to the top end of the pair of rollers.

[0007] Preferably, the outer frame is a frame structure, and the bottom of the outer frame is vertically fixed with a first insertion rod, the outer frame is inserted into the inner side of the first fixed plate through the first insertion rod, the first fixed plate is fixed on the top inner wall of the grinding box, and the outer side of the first insertion rod is sleeved with a first spring, and the first spring is connected between the outer frame and the first insertion rod.

[0008] Preferably, a first shaft rod is laterally arranged below the outer frame, a first pulley is fixed to the top of the first shaft rod, the first shaft rod is connected to the first transmission belt and the output end of the motor through the first pulley for transmission connection, a first vibration wheel located below the outer frame is fixed to the end of the first shaft rod, and the first vibration wheel is eccentrically arranged between the first shaft rod.

[0009] Preferably, a second fixing plate is fixedly installed in the middle of the inner side of the grinding box, and the fixing frame is inserted into the second fixing plate through the second insertion rod fixed at the bottom thereof, and the outer sleeve of the second insertion rod is provided with a second spring, and the second spring is connected between the second fixing plate and the fixing frame.

[0010] Preferably, a buckle is fixedly mounted on the bottom of the screen, and the buckle is in an "L" shape. The screen is correspondingly engaged with a slot provided on the top surface of the fixing frame through the buckle.

[0011] Preferably, a partition door located outside the screen is rotatably installed on the right side of the grinding box, the second shaft is located below the partition door, a second vibration wheel is fixedly installed on the end of the second shaft, and the second vibration wheel is eccentrically installed between the second shaft.

[0012] Preferably, the material receiving box and the grinding box are connected correspondingly, a feeding pipe is connected at the top of the material receiving box, the top of the feeding pipe is connected to the top of the grinding box, a feeding auger is arranged inside the feeding pipe, and the top of the feeding auger is fixedly connected to a second pulley.

[0013] Preferably, a third pulley connected to the outside of the grinding box is provided on the outer side of the top of the feeding tube, and the third pulley is connected to the second pulley through the second transmission belt. Bevel gears are fixed to the outer sides of the third pulley and the first pulley, and the third pulley is connected to the first pulley through a bevel gear transmission.

[0014] Preferably, a partition fixed to the inner side of the grinding box is provided between the receiving plate and the concentrating plate, the partition is obliquely connected to the inside of the grinding box, and a material discharge trough is provided in the middle of the partition.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: the circulating grinding type kaolin refining grinder can pre-crush the agglomerated kaolin, facilitate the circulating grinding and filtering of kaolin, can automatically screen, is conducive to reducing dust, can directly dry, and improve the grinding and processing efficiency of kaolin; 1. In this solution, an outer frame, a partition net, a first shaft rod and a first vibrating wheel are provided. Through the grid-like structure of the partition net, when kaolin enters the grinding box, large or wet kaolin can be dispersed for easy grinding. At the same time, the first shaft rod drives the first vibrating wheel to impact the outer frame, so that the outer frame and the partition net vibrate as a whole at the top of the grinding box for easy crushing. 2. In this scheme, a fixed frame, a screen, a second shaft and a receiving plate are provided. The screen and the fixed frame are detachable structures, and the screen can be replaced by opening the partition door. The ground and crushed kaolin falls and impacts the receiving plate, so that the receiving plate drives the second shaft to rotate, so that the second shaft can vibrate the fixed frame and the screen as a whole through the second vibration wheel, which is convenient for screening processing; 3. In this scheme, a material receiving box, a feeding pipe and a feeding auger are provided. The material receiving box is connected and arranged on the left side of the grinding box. Through the connection between the material receiving box and the grinding box, it is convenient to use the feeding auger inside the feeding pipe to transport the kaolin that has not been screened into blocks for grinding again. At the same time, the second fan is connected inside the feeding pipe to dry it, which is convenient for grinding and separation; 4. In this scheme, a second pulley, a third pulley, a first pulley and a bevel gear are provided. The first transmission belt is connected by a motor to facilitate the transmission of the first pulley and the first shaft rod, which is convenient for the vibration of the outer frame and the first pulley. The first pulley is connected to the third pulley through the bevel gear, which is convenient for driving the feeding auger to transport kaolin through the bevel gear and the second pulley, so as to facilitate the circulation grinding of kaolin. 5. In this solution, a partition and a material discharge chute are provided. The partition is obliquely arranged at the bottom of the grinding box, and the partition can be used to limit the bottom of the kaolin to reduce dust; 6. In this scheme, a discharge pipe, a first fan and a blow pipe are provided. The discharge pipe is used to facilitate the installation of a discharge auger for discharge, and the discharge pipe is connected to the first fan, which facilitates the oblique air intake through the blow pipe and drives the internal air flow to be discharged outwards. The air flow can reduce the internal flying dust flying upwards, and at the same time, the second fan transmits air downward, which is convenient for driving the kaolin to be discharged for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall left side structure of the present invention; Figure 2 It is a schematic diagram of the overall right side structure of the present invention; Figure 3 It is a schematic diagram of the overall internal structure of the present invention; Figure 4 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 5 For the present invention Figure 3 The enlarged structural diagram at B in the middle; Figure 6 It is a schematic diagram of the overall middle section structure of the present invention; Figure 7 This is a schematic diagram of the overall exploded structure of the fixing frame and the screen of the present invention; Figure 8 It is a schematic diagram of the overall side cutaway structure of the present invention; Fig. 9 It is a front cutaway structural schematic diagram of the feeding tube of the present invention; Fig.10 It is a schematic diagram of the material circulation structure of the present invention.

[0017] In the figure: 1, grinding box; 2, grinding roller; 3, motor; 4, connecting gear; 5, outer frame; 6, screen; 7, first plug rod; 8, first fixing plate; 9, first spring; 10, first shaft rod; 11, first pulley; 12, first transmission belt; 13, first vibration wheel; 14, second fixing plate; 15, fixing frame; 16, second plug rod; 17, second spring; 18, screen; 19, buckle; 20, slot; 21, partition door; 22. Second shaft rod; 23. Vertical rod; 24. Receiving plate; 25. Second vibrating wheel; 26. Receiving box; 27. Loading pipe; 28. Loading auger; 29. ​​Second pulley; 30. Third pulley; 31. Second transmission belt; 32. Bevel gear; 33. Partition plate; 34. Discharging chute; 35. Concentrating plate; 36. Discharging chute; 37. Discharging pipe; 38. Discharging auger; 39. First fan; 40. Blowing pipe; 41. Second fan. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0019] See also Figure 1-10 , the present invention provides the following technical solutions: A circulating rolling type kaolin refining grinder, comprising: a grinding box 1, rolling rollers 2, a motor 3, a connecting gear 4, an outer frame 5, a partition net 6, a first plug rod 7, a first fixed plate 8, a first spring 9, a first shaft rod 10, a first pulley 11, a first transmission belt 12, a first vibration wheel 13, a second fixed plate 14, a fixed frame 15, a second plug rod 16, a second spring 17, a screen 18, a buckle 19, a slot 20, a partition door 21, a second shaft rod 22, a vertical rod 23, a receiving plate 24, a second vibration wheel 25, a receiving box 26, a feeding pipe 27, a feeding auger 28, a second pulley 29, a third pulley 30, a second transmission belt 31, a bevel gear 32, a partition plate 33, a feeding trough 34, a centralizing plate 35, a discharging trough 36, a discharging pipe 37, a discharging auger 38, a first fan 39, a blowing pipe 40 and a second fan 41; Wherein: a pair of rollers 2 are rotatably mounted on the inner side of the top of the grinding box 1, an outer frame 5 is arranged on the inner side of the top of the grinding box 1, and a grid-shaped partition 6 is fixedly mounted on the inner side of the outer frame 5, the outer frame 5 is slidably mounted up and down on the inner side of the top of the grinding box 1, a motor 3 is connected to the top of the pair of rollers 2, a plurality of groups of the pair of rollers 2 are arranged at equal intervals on the inner side of the grinding box 1, a connecting gear 4 meshing in sequence is fixed on the top of the pair of rollers 2, the outer frame 5 is a frame structure, and a first insertion rod 7 is vertically fixedly mounted on the bottom of the outer frame 5, and the outer frame 5 is inserted into the first fixed plate through the first insertion rod 7 8, the first fixed plate 8 is fixed on the top inner wall of the grinding box 1, the outer side of the first plug rod 7 is sleeved with a first spring 9, the first spring 9 is connected between the outer frame 5 and the first plug rod 7, a first shaft rod 10 is horizontally arranged below the outer frame 5, a first pulley 11 is fixed to the top of the first shaft rod 10, the first shaft rod 10 is connected to the first transmission belt 12 and the output end of the motor 3 through the first pulley 11, the end of the first shaft rod 10 is fixed with a first vibration wheel 13 located below the outer frame 5, and the first vibration wheel 13 is eccentrically arranged between the first shaft rod 10.

[0020] In a specific application scenario, the motor 3 is connected to the first transmission belt 12 through a pulley to drive the first shaft 10 to rotate synchronously. The first shaft 10 is eccentrically installed with the first vibration wheel 13 to drive the first vibration wheel 13 to cyclically rotate the outer frame 5, so that the outer frame 5 can be cyclically lifted and lowered above the first insertion rod 7. The kaolin can be vibrated through the partition net 6 on the inner side of the outer frame 5, so as to disperse the lumped kaolin for grinding. At the same time, the outer frame 5 is inserted through the inner side of the first insertion rod 7 through the first fixed plate 8 to maintain stability, and the elastic action of the first spring 9 facilitates the outer frame 5 to reset after sliding up, so as to ensure the cyclic lifting and vibration of the outer frame 5, so as to break up and grind the kaolin.

[0021] Among them: the screen 18 is obliquely arranged below the grinding roller 2, the bottom of the screen 18 is detachably mounted on the top surface of the fixing frame 15, the fixing frame 15 is slidably mounted on the inner middle part of the grinding box 1, and a second fixing plate 14 is fixedly mounted on the inner middle part of the grinding box 1, the fixing frame 15 is inserted into the second fixing plate 14 through a second plug rod 16 fixed at the bottom thereof, a second spring 17 is arranged on the outer sleeve of the second plug rod 16, and the second spring 17 is connected between the second fixing plate 14 and the fixing frame 15, a buckle 19 is fixedly mounted on the bottom of the screen 18, and the shape structure of the buckle 19 is an "L"-shaped structure, and the screen 18 is correspondingly engaged with a slot 20 opened on the top surface of the fixing frame 15 through the buckle 19.

[0022] In a specific application scenario, by opening the partition door 21, the screen 18 is snap-connected with the slot 20 on the top surface of the fixing frame 15 through the buckle 19, so that the screen 18 can be replaced and used, and by closing the partition door 21, the screen 18 can be limited, wherein the fixing frame 15 is elastically slidably connected to the top of the second fixed plate 14 through the second plug rod 16 and the second spring 17, which is convenient for screening kaolin, so that the refined kaolin falls, and the unscreened kaolin passes through the inclined screen 18 into the interior of the receiving box 26.

[0023] Among them: a second shaft rod 22 rotatably connected to the middle part of the grinding box 1 is arranged below the fixed frame 15, the second shaft rod 22 is arranged parallel to the screen 18, a vertical rod 23 is vertically fixed downward from the middle part of the second shaft rod 22, and a receiving plate 24 with an arc-shaped structure is fixed to the bottom end of the vertical rod 23, a partition door 21 located on the outside of the screen 18 is rotatably installed on the right side of the grinding box 1, the second shaft rod 22 is located below the partition door 21, and a second vibration wheel 25 is fixedly installed on the end of the second shaft rod 22, and the second vibration wheel 25 is eccentrically installed with the second shaft rod 22.

[0024] In a specific application scenario, kaolin falls after being screened by the screen 18, and the falling kaolin falls directly onto the surface of the receiving plate 24. The uneven distribution of the discharged kaolin on the surface of the receiving plate 24 causes the receiving plate 24 to drive the second shaft rod 22 to shake through the vertical rod 23. The shaking of the second shaft rod 22 drives the second vibrating wheel 25 eccentrically arranged therewith to collide with the fixed frame 15, so as to facilitate the vibration of the screen 18 and improve the screening efficiency.

[0025] Wherein: the material receiving box 26 is arranged on the left side of the grinding box 1, and a feeding pipe 27 is vertically arranged inside the material receiving box 26, and a feeding auger 28 is installed inside the feeding pipe 27, and a second fan 41 is arranged on the outside of the feeding pipe 27, and the output end of the second fan 41 extends obliquely downward into the inside of the feeding pipe 27, and the material receiving box 26 and the grinding box 1 are correspondingly connected, and the top of the material receiving box 26 is connected with the feeding pipe 27, and the top of the feeding pipe 27 is connected with the top of the grinding box 1, and a feeding auger 28 is arranged inside the feeding pipe 27, and the top of the feeding auger 28 is fixedly connected with a second pulley 29, and a third pulley 30 connected to the outside of the grinding box 1 is arranged on the outside of the top of the feeding pipe 27, and the third pulley 30 is connected to the outside of the grinding box 1 through the second transmission belt 31. The outer sides of the third pulley 30 and the first pulley 11 are fixed with bevel gears 32, and the third pulley 30 and the first pulley 11 are connected through the bevel gear 32.

[0026] In a specific application scenario, the motor 3 is started, and while the motor 3 drives the first pulley 11 to rotate through the first transmission belt 12, the first pulley 11 drives the third pulley 30 to rotate synchronously through the bevel gear 32 on its outer side, and the third pulley 30 drives the second pulley 29 to rotate through the second transmission belt 31, so that the loading auger 28 can rotate to connect the kaolin in the material box 26 and the loading pipe 27 to transport the kaolin upward for circulation, wherein the material receiving box 26 is directly connected to the grinding box 1, and its connection position is higher than the surface of the screen 18. The kaolin that has not been screened by the screen 18 enters the inner side of the material receiving box 26, and the bottom surface of the material receiving box 26 is arranged obliquely toward the loading pipe 27, so that the kaolin is concentrated on the inner side of the loading pipe 27, so that the kaolin can be re-conveyed to the top of the grinding box 1 through the loading auger 28, so that it can be ground again by the grinding roller 2.

[0027] Among them, a partition plate 33 fixed to the inner side of the grinding box 1 is arranged between the receiving plate 24 and the concentrating plate 35 . The partition plate 33 is obliquely connected to the inside of the grinding box 1 , and a material discharge chute 34 is opened in the middle of the partition plate 33 .

[0028] In a specific application scenario, the space between the partition plate 33 and the screen 18 can be reduced by separating the space between the concentrated plate 35 and the screen 18, and the upwelling of kaolin dust during material discharge can be reduced. At the same time, the end of the partition 33 is spaced apart from the grinding box 1, and a material discharge trough 34 is opened in the middle of the partition 33 for easy material discharge.

[0029] Among them: the concentrating plate 35 is symmetrically fixed on the bottom of the grinding box 1, the middle part of the concentrating plate 35 encloses a discharge trough 36, a discharge pipe 37 connected to the right side of the grinding box 1 is arranged on the right side of the discharge trough 36, a discharge auger 38 is arranged on the inner side of the discharge trough 36, a first fan 39 is installed on the top of the discharge pipe 37, and the output end of the first fan 39 extends obliquely into the interior of the discharge pipe 37 through the blowing pipe 40.

[0030] In a specific application scenario, the first fan 39 supplies air to the inside of the discharge pipe 37 through the blow pipe 40, and inputs hot air to the inside of the upper pipe 27 through the second fan 41. The first fan 39 can drive the air flow, and at the same time, it can dry and accelerate the output of kaolin for easy discharge and use.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention; the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in the field. In addition, the directional nouns such as up, down, left, right, front and back in the text only represent their relative positions rather than absolute positions.

[0032] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circulating grinding type kaolin fine grinding machine, comprising: A grinding box (1) and a pair of grinding rollers (2) rotatably mounted on the inner side of the top of the grinding box (1), characterized in that it also includes: An outer frame (5), the outer frame (5) being arranged on the inner side of the top end of the grinding box (1), and a partition net (6) having a grid-like structure is fixedly installed on the inner side of the outer frame (5), and the outer frame (5) is slidably installed up and down on the inner side of the top end of the grinding box (1); A screen (18), the screen (18) being obliquely arranged below the grinding roller (2), the bottom of the screen (18) being detachably mounted on the top surface of a fixing frame (15), the fixing frame (15) being mounted on the inner middle part of the grinding box (1) in an up-and-down sliding manner; Wherein, a second shaft (22) is provided below the fixed frame (15) and is rotatably connected to the middle part of the grinding box (1); the second shaft (22) is arranged parallel to the screen (18); a vertical rod (23) is vertically fixed downward from the middle part of the second shaft (22); and a material receiving plate (24) with an arc-shaped structure is fixed to the bottom end of the vertical rod (23); A material receiving box (26), the material receiving box (26) being arranged on the left side of the grinding box (1), a feeding pipe (27) being arranged vertically inside the material receiving box (26), a feeding auger (28) being installed inside the feeding pipe (27), a second fan (41) being arranged outside the feeding pipe (27), an output end of the second fan (41) extending obliquely downward into the interior of the feeding pipe (27); A concentrating plate (35) is symmetrically fixed to the bottom of the grinding box (1); the middle part of the concentrating plate (35) encloses a discharge trough (36); a discharge pipe (37) connected to the right side of the grinding box (1) is arranged on the right side of the discharge trough (36); a discharge auger (38) is arranged on the inner side of the discharge trough (36); a first fan (39) is installed on the top of the discharge pipe (37); and the output end of the first fan (39) extends obliquely into the interior of the discharge pipe (37) through a blow pipe (40).

2. The circulating grinding machine for kaolin refining according to claim 1 is characterized in that: The top ends of the pair of grinding rollers (2) are connected to a motor (3), a plurality of groups of the pair of grinding rollers (2) are arranged at equal intervals on the inner side of the grinding box (1), and connecting gears (4) that mesh in sequence are fixed to the top ends of the pair of grinding rollers (2).

3. The circulating grinding machine for kaolin refining according to claim 1, characterized in that: The outer frame (5) is a frame structure, and a first insertion rod (7) is vertically fixedly installed at the bottom of the outer frame (5); the outer frame (5) is inserted into the inner side of a first fixing plate (8) through the first insertion rod (7); the first fixing plate (8) is fixed to the top inner side wall of the grinding box (1); a first spring (9) is sleeved on the outer side of the first insertion rod (7); the first spring (9) is connected between the outer frame (5) and the first insertion rod (7).

4. The circulating rolling type kaolin refining grinding machine according to claim 1 is characterized in that: A first shaft (10) is transversely arranged below the outer frame (5); a first pulley (11) is fixed to the top of the first shaft (10); the first shaft (10) is connected to a first transmission belt (12) and an output end of the motor (3) via the first pulley (11); a first vibration wheel (13) located below the outer frame (5) is fixed to the end of the first shaft (10); the first vibration wheel (13) is eccentrically arranged with respect to the first shaft (10).

5. The circulating grinding machine for kaolin refining according to claim 1, characterized in that: A second fixing plate (14) is fixedly mounted in the middle of the inner side of the grinding box (1); the fixing frame (15) is inserted into the interior of the second fixing plate (14) via a second insertion rod (16) fixed at the bottom thereof; a second spring (17) is provided on the outer side of the second insertion rod (16); and the second spring (17) is connected between the second fixing plate (14) and the fixing frame (15).

6. The circulating rolling type kaolin refining grinding machine according to claim 1 is characterized in that: The bottom of the screen (18) is fixedly mounted with a buckle (19), the buckle (19) being in an "L" shape, and the screen (18) is correspondingly engaged with a slot (20) provided on the top surface of the fixing frame (15) via the buckle (19).

7. The circulating rolling type kaolin refining grinding machine according to claim 1 is characterized in that: A partition door (21) located outside the screen (18) is rotatably mounted on the right side of the grinding box (1); the second shaft (22) is located below the partition door (21); a second vibration wheel (25) is fixedly mounted on the end of the second shaft (22); the second vibration wheel (25) is eccentrically mounted to the second shaft (22).

8. The circulating grinding machine for kaolin refining according to claim 1, characterized in that: The material receiving box (26) is connected to the grinding box (1) in correspondence, a feeding pipe (27) is connected to the top of the material receiving box (26), the top of the feeding pipe (27) is connected to the top of the grinding box (1), a feeding auger (28) is arranged inside the feeding pipe (27), and the top of the feeding auger (28) is fixedly connected to a second pulley (29).

9. The circulating double-rolling kaolin refining grinder according to claim 8, characterized in that: A third pulley (30) connected to the outside of the grinding box (1) is arranged on the top outer side of the feeding tube (27); the third pulley (30) is connected to the second pulley (29) through a second transmission belt (31); bevel gears (32) are fixed to the outer sides of the third pulley (30) and the first pulley (11); and the third pulley (30) is connected to the first pulley (11) through a bevel gear (32).

10. The circulating double-rolling kaolin refining grinder according to claim 1, characterized in that: A partition plate (33) fixed to the inner side of the grinding box (1) is provided between the receiving plate (24) and the concentrating plate (35); the partition plate (33) is obliquely connected to the inside of the grinding box (1); a material discharge trough (34) is provided in the middle of the partition plate (33).

Images