Coal slurry fine grinding device and method of use thereof

Abstract

The application discloses a coal slurry fine grinding device and a use method thereof, and relates to the technical field of coal slurry fine grinding, which comprises a grinding material cylinder with a built-in grinding material space and two support frames supported on the axial ends of the grinding material cylinder, a plurality of grinding material balls are arranged in the grinding material space, and a pushing element is arranged on the inner wall of the grinding material space and is arranged along the axial direction of the grinding material cylinder; the pushing element pushes the plurality of grinding material balls to roll and fall after rising to a fixed height in the grinding material space to hit the coal slurry particles; and the pushing element makes a circular motion with the grinding material cylinder to the lower part of the grinding material cylinder to generate impact between the plurality of grinding material balls hitting the coal slurry and the pushing element. The application pushes the grinding material balls to rise to a fixed height and then falls to hit the coal slurry, the grinding material balls and the coal slurry are rubbed, collided and impacted, the coal slurry is refined, the pushing element rotates to generate impact and grind the coal slurry again with the grinding material balls hitting the coal slurry, and the problem that the grinding material balls have a low rolling rising height and generate a small impact grinding force on the coal slurry due to a too slow rotating speed of the grinding material cylinder is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal slurry fine grinding, in particular to a coal slurry fine grinding device and a use method thereof. BACKGROUND

[0002] Coal slurry fine grinding is one of important means to realize efficient and clean combustion. The purpose of coal slurry fine grinding is to increase the surface area and activity of coal so as to improve its combustion characteristics. Through fine grinding, coal particles are ground to micron level, which can significantly improve its combustion efficiency. In the process of coal slurry fine grinding, a ball mill is mostly used in a water coal slurry fine grinding machine. In the grinding process, the grinding balls are affected by the rotational inertia of the rotating body and roll along the inner wall of the body to disappear the kinetic potential energy. At this time, the height of the grinding balls has the gravitational potential energy, which is converted into kinetic potential energy and falls to hit the coal slurry. Through the friction, collision and impact between the grinding balls and the coal slurry, the coal slurry is refined. However, when the rotational speed of the body is too slow, the rolling height of the grinding balls is low, the impact grinding force on the coal slurry is small, the coal slurry composition is refined for a long time, and the fine grinding efficiency is affected. Therefore, the present application provides a coal slurry fine grinding device and a use method thereof to solve the above problems. SUMMARY

[0003] The present application aims to provide a coal slurry fine grinding device and a use method thereof to solve the problems in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a coal slurry fine grinding device, comprising:

[0005] A grinding material cylinder with a grinding material space and two support frames supporting the grinding material cylinder axially at both ends are provided. One end of the grinding material cylinder is a closed structure, and the other end is an open structure. The open structure is detachably provided with a cylinder cover.

[0006] A plurality of grinding balls are arranged in the grinding material space. A pushing member is arranged on the inner wall of the grinding material space along the axial direction of the grinding material cylinder. The grinding material cylinder rolls in the two support frames. The pushing member moves in a circular motion trajectory with the axis of the grinding material cylinder as the center. The pushing member pushes the plurality of grinding balls to roll down and hit the coal slurry particles after rising to a certain height in the grinding material space. The friction, collision and impact between the grinding balls and the coal slurry refine the coal slurry.

[0007] The pushing member moves in a circular motion with the grinding material cylinder to the lower part of the grinding material cylinder and collides with the plurality of grinding balls hitting the coal slurry. The coal slurry between the grinding balls and the pushing member is hit again to be finely ground.

[0008] In further embodiments, a bottom frame is fixed between the bottom walls of the two support frames, a plurality of clamping blocks are fixed to the outer walls of the axial ends of the abrasive cylinder, and annular grooves are formed in the inner walls of the support frames.

[0009] In further embodiments, a sprocket wheel one is fixed to the end of the closed structure of the abrasive cylinder, a motor one is fixed to one side of the end of the bottom frame close to the closed structure of the abrasive cylinder, a sprocket wheel two is connected to the output end of the motor one, and a transmission belt is wound around the sprocket wheel one and the sprocket wheel two.

[0010] In further embodiments, a protruding part is arranged at the end of the cylinder cover and rotates in close contact with the inner wall of the open structure of the abrasive cylinder, an L-shaped support rod is fixed to the bottom wall of the cylinder cover, an insertion hole is formed in one end of the bottom frame and slides with the horizontal part of the L-shaped support rod, a threaded rod is threadedly connected to the other end of the bottom frame, and the end of the L-shaped support rod away from the cylinder cover is rotatably connected to the end of the threaded rod.

[0011] In further embodiments, the pushing member is a baffle arranged on the inner radial side wall of the abrasive cylinder, the baffle is distributed along the axial direction of the abrasive cylinder, and the cross section of the baffle is isosceles trapezoidal structure.

[0012] In further embodiments, the pushing member is an inverted V-shaped buffer baffle, the inner side top of the inverted V-shaped buffer baffle is a circular arc structure, a horizontal shaft is fixed in the circular arc structure, semi-circular sealing plates are fixed to the two ends of the horizontal shaft, the two semi-circular sealing plates slide in close contact with the front and rear ends of the buffer baffle, the two semi-circular sealing plates are fixed to the inner radial side wall of the abrasive cylinder, and the bottom ends of the buffer baffle slide in close contact with the inner radial side wall of the abrasive cylinder.

[0013] In further embodiments, the pushing member is a guide plate arranged on the inner radial side wall of the abrasive cylinder, and the two side walls of the guide plate are provided with circular arc recesses recessed towards the center of the guide plate.

[0014] In further embodiments, a semi-circular plate coaxially distributed with the abrasive cylinder is further included, the two ends of the semi-circular plate are fixed with extension plates, one side of the extension plate is fixed with the pushing member away from the inner wall of the abrasive cylinder, the other side of the extension plate is rotatably connected to the inner wall of the abrasive cylinder, a plurality of receiving grooves are formed in the semi-circular plate, a plurality of material leakage holes penetrating through the semi-circular plate are formed in the receiving grooves, the semi-circular plate, the two extension plates, and the pushing member form a separation structure, the separation structure separates the internal space of the abrasive cylinder into two areas, one area is a grinding area, and the other area is a material receiving area.

[0015] In further embodiments, a material guiding member is further included, the material guiding member includes a material receiving hopper, a spiral conveying rod and a second motor, the barrel cover is axially provided with a mounting hole for the material receiving hopper to pass through, the upper end of the material receiving hopper is inserted into the upper side wall of one end of the grinding material barrel, the material receiving hopper is provided with a material receiving groove, and the inner wall of the material receiving hopper is of a circular arc structure, one end of the spiral conveying rod is rotatably inserted into the inner wall of the material receiving groove, the second motor is fixed to one end of the material receiving hopper located outside the barrel cover, the output end of the second motor is rotatably extended into the material receiving groove and fixedly connected with the other end of the spiral conveying rod, and the one end of the material receiving hopper located outside the barrel cover is provided with a discharge port in communication with the material receiving groove.

[0016] Preferably, based on the use method of the coal slurry fine grinding device, the method comprises the following steps:

[0017] First, the grinding material balls are pushed to a fixed height, and the grinding material balls roll down along the inclined side wall of the material pushing member under the gravity and fall to hit the coal slurry at the bottom of the grinding space, so as to refine the coal slurry.

[0018] Subsequently, the grinding material balls are mixed with the coal slurry, and when the material pushing member continues to rotate and reaches the position below the grinding space and meets the grinding material balls again, the coal slurry between the grinding material balls and the material pushing member is clamped and finely ground again.

[0019] Compared with the prior art, the coal slurry fine grinding device has the following beneficial effects:

[0020] The coal slurry fine grinding device is used for pushing the grinding material balls to a fixed height and then falling to hit the coal slurry, so that the coal slurry is refined through the friction, collision and impact between the grinding material balls and the coal slurry, the coal particles are ground to the micron level, the material pushing member follows the circular motion of the grinding barrel to the position below the grinding barrel and collides with the grinding material balls hitting the coal slurry, the coal slurry between the grinding material balls and the material pushing member is clamped and finely ground again, the surface area and activity of the coal are increased, the combustion characteristics of the coal slurry are improved, the combustion efficiency is significantly improved, and the grinding speed of the grinding material balls is increased, so that the impact grinding force on the coal slurry is increased, the time for refining the composition of the coal slurry is shortened, and the fine grinding efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present application;

[0022] Figure 2 It is a schematic diagram of the barrel cover, support frame and bottom frame structure of the present application;

[0023] Figure 3 It is a half sectional view of the grinding material barrel and baffle structure of the present application;

[0024] Figure 4 Schematic diagram of the invention's baffle pushing abrasive balls to roll in the abrasive cylinder;

[0025] Figure 5 Half sectional view of the invention's abrasive cylinder and buffer baffle structure;

[0026] Figure 6 Schematic diagram of the invention's buffer baffle and sealing plate assembly structure;

[0027] Figure 7 Half sectional view of the invention's buffer baffle;

[0028] Figure 8 Sectional view of the invention's abrasive cylinder and guide plate structure;

[0029] Figure 9 Schematic diagram of the invention's guide material, cylinder cover and bottom frame structure;

[0030] Figure 10 Schematic diagram of the invention's guide material structure;

[0031] Figure 11 Effect diagram of the invention's guide material in the abrasive cylinder cooperating with the stirring plate to stir the refined coal slurry;

[0032] Figure 12 Sectional view of the invention's semicircular plate and abrasive ball cooperating structure.

[0033] In the figure: 1, abrasive cylinder; 11, clamping block; 12, cylinder cover; 13, motor one; 14, spool one; 15, conveying belt; 2, bottom frame; 21, L-shaped support rod; 22, threaded rod; 23, support frame; 3, abrasive ball; 4, baffle; 5, buffer baffle; 51, sealing plate; 52, horizontal shaft; 6, guide plate; 7, material receiving hopper; 71, spiral conveying rod; 72, discharge port; 73, motor two; 8, semicircular plate; 81, extension plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] In the embodiment, when the rotating speed of the machine body is too slow during the grinding process, the height of the abrasive ball 3 rolling up is low, the impact grinding force on the coal slurry is small, the coal slurry refining time is long, and the fine grinding efficiency is affected. Therefore, the embodiment provides a coal slurry fine grinding device, which comprises an abrasive cylinder 1 provided with an abrasive space and two support frames 23 supported on the two ends of the abrasive cylinder 1 in the axial direction. One end of the abrasive cylinder 1 is a closed structure, and the other end is an open structure. The open structure is detachably provided with a cylinder cover 12. When the cylinder cover 12 is installed on the open structure, the abrasive space of the abrasive cylinder 1 is relatively closed, and the coal slurry can be finely ground in the abrasive space. As shown in Figure 1 and Figure 2 .

[0036] The bottom walls between the two support frames 23 are fixedly provided with a bottom frame 2. The outer walls of the two ends of the abrasive cylinder 1 are fixedly provided with a plurality of clamping blocks 11. The inner walls of the support frames 23 are provided with annular grooves. The plurality of clamping blocks 11 at the same end are rotationally connected with the annular grooves of the support frames 23. The closed end of the abrasive cylinder 1 is fixedly provided with a spool 1. One end of the bottom frame 2 close to the closed structure of the abrasive cylinder 1 is fixedly provided with a motor 1. The output end of the motor 1 is connected with a spool 2. The spool 2 and the spool 1 are wound with a transmission belt 15. The motor 1 drives the spool 2 to rotate. The transmission belt 15 is driven between the spool 1 and the spool 2, so that the abrasive cylinder 1 rotates synchronously with the spool 1. The abrasive cylinder 1 rotates in the annular grooves of the two support frames 23 by the clamping blocks 11 at the two ends. A plurality of abrasive balls 3 are arranged in the abrasive space, so that the abrasive balls 3 roll in the abrasive space under the influence of the rotating inertia of the abrasive cylinder 1, and the coal slurry is finely ground. As shown in Figure 1 and 2 .

[0037] A pushing member is arranged on the inner wall of the abrasive space and arranged along the axial direction of the abrasive cylinder 1. The abrasive cylinder 1 rolls in the two support frames 23. The pushing member moves in a circular motion track with the axis of the abrasive cylinder 1 as the center. The pushing member pushes the plurality of abrasive balls 3 to roll down after rising in the abrasive space and hit the coal slurry particles. The abrasive balls 3 and the coal slurry are rubbed, collided and impacted, so that the coal slurry is refined. The fine coal particles are ground to microns, the surface area and activity of the coal are increased, the combustion characteristics of the coal are improved, and the combustion efficiency of the coal is significantly improved.

[0038] Further, the pushing member moves in a circular motion with the abrasive cylinder 1 to the lower part inside the abrasive cylinder 1 and collides with the plurality of abrasive balls 3 hitting the coal slurry. The coal slurry between the abrasive balls 3 and the pushing member is clamped and finely ground again. In the coal slurry fine grinding process, the pushing member moves in a circular motion with the abrasive cylinder 1 to the lower part inside the abrasive cylinder 1 and collides with the plurality of abrasive balls 3 falling down from the fixed height of the pushing member. The coal slurry between the abrasive balls 3 and the pushing member is clamped and finely ground again.

[0039] In general, the process of refining coal slurry by rotating the pushing member one circle is that the abrasive balls 3 are first pushed to a fixed height, and then the abrasive balls 3 roll down along the inclined downward side wall of the pushing member due to gravity, fall and hit the coal slurry at the bottom of the abrasive space, and refine the coal slurry. At this time, the abrasive balls 3 are mixed with the coal slurry, and as the pushing member continues to rotate, when the pushing member rotates to the position below the inside of the abrasive space and meets the abrasive balls 3 again to produce impact, the coal slurry located between the abrasive balls 3 and the pushing member is clamped and finely ground again. The abrasive cylinder 1 continuously rotates in a circular motion, which can repeatedly refine the coal slurry, and avoid the situation that the abrasive balls 3 have low rolling height due to the slow rotation speed of the abrasive cylinder 1, which results in small impact grinding force on the coal slurry, long time consumption for refining the composition of the coal slurry, and affects the refining efficiency.

[0040] The end of the cylinder cover 12 is provided with a protruding part that is rotationally attached to the inner wall of the opening structure of the abrasive cylinder 1. The bottom wall of the cylinder cover 12 is fixed with an L-shaped support rod 21. One end of the bottom frame 2 is provided with a plug-in hole that is slidably inserted with the horizontal part of the L-shaped support rod 21. The other end of the bottom frame 2 is threadedly connected with a threaded rod 22. The end of the L-shaped support rod 21 away from the cylinder cover 12 is rotationally connected with the end of the threaded rod 22. Rotating the threaded rod 22 adjusts the position of the threaded rod 22 along the longitudinal direction, and the L-shaped support rod 21 slides along the plug-in hole horizontally, so that the cylinder cover 12 is synchronously adjusted in position, and the protruding part of the cylinder cover 12 is away from or close to the opening structure of the abrasive cylinder 1, thereby opening or closing the opening structure. Correspondingly, after the composition of the coal slurry is refined, the cylinder cover 12 is removed from the opening structure, and the refined coal slurry can be taken out from the abrasive space.

[0041] The following will specifically describe the pushing of the abrasive balls 3 in the space by the pushing member. The first embodiment of the pushing member is a baffle 4 arranged on the radial side wall of the abrasive cylinder 1. The baffle 4 is distributed along the axial direction of the abrasive cylinder 1, and the cross section of the baffle 4 is in the shape of an isosceles trapezoid. Figure 3 As shown in FIG. 4, the baffle 4 rotates in a circular motion with the abrasive cylinder 1, and the baffle 4 pushes the abrasive balls 3 to a fixed height. At this time, the end of the baffle 4 is inclined downward, and because the cross section of the baffle 4 is in the shape of an isosceles trapezoid, the abrasive balls 3 roll down along the inclined downward side wall of the baffle 4 due to gravity, fall and hit the coal slurry at the bottom of the abrasive space, and refine the coal slurry, as shown in FIG. 5. Figure 4 Furthermore, the baffle 4 rotates in a circular motion with the abrasive cylinder 1 to the lower position inside the abrasive cylinder 1, and will collide again with the abrasive balls 3 that have fallen from the baffle 4 to the fixed height before, at this time, the coal slurry located between the baffle 4 and the abrasive balls 3 is clamped and finely ground again.

[0042] Second embodiment of the pushing member: the pushing member is a guide plate 6 arranged on the inner radial side wall of the grinding cylinder 1, and the side walls on both sides of the guide plate 6 are provided with circular arc recesses recessed towards the center of the guide plate 6. As shown in Figure 8 , the guide plate 6 follows the circumferential movement of the grinding cylinder 1, and the guide plate 6 pushes the grinding balls 3 to a fixed height, at which time the end of the guide plate 6 is inclined downward, and because the side walls on both sides of the guide plate 6 are provided with circular arc recesses recessed towards the center of the guide plate 6, the grinding balls 3 roll along the circular arc recesses of the inclined downward side wall of the guide plate 6 due to gravity, and when the grinding balls 3 roll out of the end of the guide plate 6, they will be thrown upward again, raising the height, and then falling and hitting the coal slurry located at the bottom of the grinding space. After the grinding balls 3 fall, they will rub, collide and impact with the coal slurry, refining the coal slurry. Moreover, the guide plate 6 follows the circumferential movement of the grinding cylinder 1 to the lower part inside the grinding cylinder 1, and will again collide with the several grinding balls 3 that have previously risen to a fixed height from the guide plate 6 and then fallen, at which time the coal slurry located between the grinding balls 3 and the guide plate 6 is again finely ground by being pinched.

[0043] Third embodiment of the pushing member: the pushing member is a buffer baffle 5 of inverted V-shaped structure, the inner top of the buffer baffle 5 of inverted V-shaped structure is a circular arc structure, and a horizontal shaft 52 is fixed in the circular arc structure, the ends of the horizontal shaft 52 are fixed with semicircular structure sealing plates 51, and the two sealing plates 51 are slidingly attached to the front and rear ends of the buffer baffle 5, the two sealing plates 51 are fixed on the inner radial side wall of the grinding cylinder 1, and the bottom ends of the buffer baffle 5 are slidingly attached to the inner radial side wall of the grinding cylinder 1. As shown in Figure 5 , Figure 6 and Figure 7 , the two sealing plates 51 are blocked at the front and rear ends of the buffer baffle 5, and the bottom ends of the buffer baffle 5 are slidingly attached to the inner radial side wall of the grinding cylinder 1, so that the inner space of the buffer baffle 5 is relatively closed, preventing powder from entering the inner space of the buffer baffle 5 during the grinding process. The buffer baffle 5 follows the circumferential movement of the grinding cylinder 1, and the side wall of the buffer baffle 5 pushes the grinding balls 3 to a fixed height, at which time the end of the buffer baffle 5 is inclined downward, and the grinding balls 3 roll along the inclined downward side wall of the buffer baffle 5 due to gravity and fall and hit the coal slurry located at the bottom of the grinding space. After the grinding balls 3 fall, they will rub, collide and impact with the coal slurry, refining the coal slurry. Moreover, the buffer baffle 5 follows the circumferential movement of the grinding cylinder 1 to the lower part inside the grinding cylinder 1, and will again collide with the several grinding balls 3 that have previously risen to a fixed height from the buffer baffle 5 and then fallen, at which time the coal slurry located between the grinding balls 3 and the buffer baffle 5 is again finely ground by being pinched.

[0044] Further, the half-round plate 8 coaxial with the grinding cylinder 1 is further included, and the extension plates 81 are fixed at both ends of the half-round plate 8, one side of the extension plates 81 is fixed away from the inner wall of the grinding cylinder 1, and the other side of the extension plates 81 is rotationally attached to the inner wall of the grinding cylinder 1, the half-round plate 8, the extension plates 81 and the pushing member form a separation structure, which separates the internal space of the grinding cylinder 1 into two areas, one area is a grinding area, and the other area is a receiving area, as shown in Figure 11 and Figure 12 The coal slurry to be refined is put into the grinding area, and the half-round plate 8, the extension plates 81 and the pushing member simultaneously follow the circumferential movement of the grinding cylinder 1, the half-round plate 8, the extension plates 81 and the pushing member on one side of the side wall of the grinding area push the grinding balls 3 to a fixed height, the grinding balls 3 roll and fall due to the inclination of the half-round plate 8, the extension plates 81 and the pushing member, and hit the coal slurry in the grinding area, and the grinding balls 3 fall and rub, collide and impact with the coal slurry to refine the coal slurry. This grinding and refining method of coal slurry is applicable to the above three different pushing members, and no matter which pushing member is used, the half-round plate 8 and the extension plates 81 can form a separation structure and a new grinding and refining method of coal slurry.

[0045] In addition, during the grinding process, the coal water slurry is continuously ground in the cylinder, and the coal water slurry components that have been ground to the required particle size are still mixed in the coal slurry, that is, different particle size coal slurries are mixed together, resulting in over-grinding of some components, and also affecting the grinding efficiency of the coal slurry that has not been ground to the required particle size. A plurality of receiving grooves are formed on the half-round plate 8, a plurality of leakage holes penetrating the half-round plate 8 are formed in the receiving grooves, and the aperture of the leakage hole can be set according to the requirement of the refined particle size of the coal slurry. When the coal slurry in the grinding area is ground to the required particle size, it is leaked into the receiving area through the leakage hole, so that the refined coal slurry components are separated from the coal slurry components that have not been ground to the required particle size. Therefore, when the grinding balls 3 roll along the plurality of receiving grooves of the half-round plate 8, a feeling of stagnation occurs, which plays a role in vibrating the half-round plate 8, and the blocked leakage holes are shaken off through the vibration operation. Avoiding a large number of blocked leakage holes affecting the separation of the coal slurry components before and after refinement.

[0046] Moreover, in order to improve the efficiency of the refined coal slurry composition, a material guiding member is further included, which comprises a material receiving hopper 7, a spiral conveying rod 71 and a second motor 73. The barrel cover 12 is axially provided with a mounting hole for the material receiving hopper 7 to pass through. The upper end of the material receiving hopper 7 is inserted into the upper side wall of one end of the grinding barrel 1 and is provided with a material receiving groove. The inner wall of the material receiving hopper 7 is in a circular arc structure. One end of the spiral conveying rod 71 is rotatably inserted into the inner wall of the material receiving groove. The second motor 73 is fixed to one end of the material receiving hopper 7 located outside the barrel cover 12. The output end of the second motor 73 is rotatably extended into the material receiving groove and is fixedly connected to the other end of the spiral conveying rod 71. The one end of the material receiving hopper 7 located outside the barrel cover 12 is provided with a discharge port 72 in communication with the material receiving groove. The inner wall of the semicircular plate 8 is rotatably attached to the outer wall of the material receiving hopper 7. Figure 9 and Figure 10 As shown in Figs. 8 and 9, during the rotation of the semicircular plate 8, since the inner wall of the semicircular plate 8 is rotatably attached to the outer wall of the material receiving hopper 7, when the semicircular plate 8 is rotated to above the material receiving hopper 7, the ground and refined coal slurry composition will fall into the material receiving groove through the leakage hole. The second motor 73 is rotated to drive the spiral conveying rod 71 to rotate and convey the ground and refined coal slurry in the material receiving groove and discharge it from the discharge port 72.

[0047] When the semicircular plate 8 is rotated and flipped to be misaligned with the material receiving groove of the material receiving hopper 7, the ground and refined coal slurry composition falls into the receiving area through the leakage hole. The semicircular plate 8, the two side extension plates 81 and the material pushing member simultaneously follow the circular motion of the grinding barrel 1. The coal slurry composition in the receiving area is pushed by the material pushing member or the one side extension plate 81 to make a circular motion. During the rotation of the semicircular plate 8, the two side extension plates 81 and the material pushing member, the ground and refined coal slurry composition slides along the inclined side wall of the extension plate 81 or the material pushing member to the material receiving groove of the material receiving hopper 7. Then, the ground and refined coal slurry composition is rotated and discharged by the spiral conveying rod 71, thereby realizing the discharge of the ground and refined coal slurry composition.

[0048] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A coal slurry fine grinding device, characterized in that, include: The abrasive cylinder (1) with a built-in abrasive space and two support frames (23) that are rolled on both ends of the abrasive cylinder (1) in the axial direction. One end of the abrasive cylinder (1) is a closed structure and the other end is an open structure. The open structure is detachably equipped with a cylinder cover (12). The abrasive space contains several abrasive balls (3), and the inner wall of the abrasive space is provided with a pusher arranged along the axial direction of the abrasive cylinder (1). The abrasive cylinder (1) rolls in two support frames (23). The pusher moves in a circular motion around the axis of the abrasive cylinder (1). The pusher pushes several abrasive balls (3) to rise in height in the abrasive space and then rolls down to hit the coal slurry particles. The friction, collision and impact between the abrasive balls (3) and the coal slurry refine the coal slurry. The pusher follows the grinding cylinder (1) in a circular motion until it reaches the lower part of the grinding cylinder (1) and collides with several grinding balls (3) that are hitting the coal slurry. The coal slurry located between the grinding balls (3) and the pusher is clamped and then finely ground again. It also includes a semi-circular plate (8) coaxially distributed with the abrasive cylinder (1). Both ends of the semi-circular plate (8) are fixed with extension plates (81). One side of the extension plate (81) is fixed to the end of the pusher away from the inner wall of the abrasive cylinder (1), and the end of the other side of the extension plate (81) is rotated and fitted with the inner wall of the abrasive cylinder (1). Multiple receiving grooves are provided on the semi-circular plate (8). Multiple material leakage holes penetrating the semi-circular plate (8) are provided in the receiving grooves. The semi-circular plate (8), the two side extension plates (81) and the pusher form a partition structure. The partition structure divides the internal space of the abrasive cylinder (1) into two areas: one area is the abrasive area and the other area is the material receiving area. It also includes a material guide, which includes a receiving hopper (7), a spiral conveyor rod (71), and a second motor (73). The cylinder cover (12) has an axially opened mounting hole for the receiving hopper (7) to pass through. The upper side wall of the end of the receiving hopper (7) that is inserted into the grinding cylinder (1) has a receiving groove, and the inner wall of the receiving hopper (7) is an arc-shaped structure. One end of the spiral conveyor rod (71) is rotatably inserted into the inner wall of the receiving groove. The second motor (73) is fixed at one end of the receiving hopper (7) located outside the cylinder cover (12). The output end of the second motor (73) extends rotatably into the receiving groove and is fixedly connected to the other end of the spiral conveyor rod (71). The side of the receiving hopper (7) located outside the cylinder cover (12) has a discharge port (72) that communicates with the receiving groove. The inner wall of the semi-circular plate (8) is rotatably attached to the outer wall of the receiving hopper (7).

2. The coal slurry fine grinding device according to claim 1, characterized in that: A bottom frame (2) is fixed between the bottom walls of the two support frames (23). Multiple locking blocks (11) are fixed on the outer walls of both ends of the abrasive cylinder (1) along the axial direction. An annular groove is opened on the inner side wall of the support frame (23). Multiple locking blocks (11) at the same end are rotated and locked with the annular groove of the support frame (23).

3. The coal slurry fine grinding device according to claim 2, characterized in that: The end of the closed structure of the abrasive cylinder (1) is fixed with a first I-beam wheel (14), and the bottom frame (2) is fixed with a first motor (13) on one side near the closed structure of the abrasive cylinder (1). The output end of the first motor (13) is connected to a second I-beam wheel, and a conveyor belt (15) is wound between the second I-beam wheel and the first I-beam wheel (14).

4. The coal slurry fine grinding device according to claim 2, characterized in that: The end of the cylinder cover (12) is provided with a protrusion that rotates and fits against the inner wall of the opening structure of the abrasive cylinder (1). An L-shaped support rod (21) is fixed to the bottom wall of the cylinder cover (12). One end of the bottom frame (2) is provided with an insertion hole that slides into the horizontal part of the L-shaped support rod (21). The other end of the bottom frame (2) is threadedly connected to a threaded rod (22). The end of the L-shaped support rod (21) away from the cylinder cover (12) is rotatably connected to the end of the threaded rod (22).

5. The coal slurry fine grinding apparatus according to claim 1, characterized in that: The pusher is a baffle (4) set on the radial side wall inside the abrasive cylinder (1). The baffle (4) is distributed along the axial direction of the abrasive cylinder (1), and the cross section of the baffle (4) is an isosceles trapezoidal structure.

6. The coal slurry fine grinding apparatus according to claim 1, characterized in that: The pusher is an inverted V-shaped buffer baffle (5). The top of the inner side of the inverted V-shaped buffer baffle (5) is an arc-shaped structure, and a horizontal shaft (52) is fixed inside the arc-shaped structure. Both ends of the horizontal shaft (52) are fixed with semi-circular sealing plates (51), and the two sealing plates (51) slide against the front and rear ends of the buffer baffle (5). The two sealing plates (51) are fixed to the inner radial sidewall of the abrasive cylinder (1), and the bottom ends of the buffer baffle (5) slide against the inner radial sidewall of the abrasive cylinder (1).

7. The coal slurry fine grinding apparatus according to claim 1, characterized in that: The pusher is a guide plate (6) set on the radial side wall inside the abrasive cylinder (1). Both sides of the guide plate (6) are provided with an arc-shaped recessed part in the center of the guide plate (6).

8. A method of using a coal slurry fine grinding device, comprising the coal slurry fine grinding device according to any one of claims 1-7, characterized in that, Includes the following steps: First, the abrasive ball (3) is pushed to a fixed height. Due to its own weight, the abrasive ball (3) rolls down along the inclined downward pusher side wall and hits the coal slurry at the bottom of the abrasive space, thus refining the coal slurry. Subsequently, the grinding ball (3) is mixed with the coal slurry. As the pusher continues to rotate, when the pusher rotates to the lower position inside the grinding space and meets the grinding ball (3) again, it will collide. At this time, the coal slurry located between the grinding ball (3) and the pusher is clamped and then finely ground again.

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