Spiral self-flowing coal crushing and grading integrated device and use method

Abstract

The present invention provides a spiral self-flowing coal crushing and grading integrated device, the integrated device comprises: a primary feeding tray, the primary feeding tray is used to hold un-crushed and graded coal, the bottom of the primary feeding tray is provided with a drop opening; a crushing and grading integrated unit, the crushing and grading integrated unit is provided below the primary feeding tray, the coal dropped from the drop opening of the primary feeding tray enters the crushing and grading integrated unit; the crushing and grading integrated unit comprises a spiral tube, the inner wall of the spiral tube is provided with a friction crushing unit, and the coal is impacted on the friction crushing unit when falling from the spiral tube under the action of gravity, so as to crush the coal; the lower end of the bolt tube is provided with a discharge port, the angle between the tangent line at the discharge port position and the horizontal plane is an acute angle, the discharge port is used to give the coal a horizontal initial velocity when discharging, and the larger the coal particles, the smaller the horizontal initial velocity. The device can simultaneously realize the crushing and grading of coal, and save energy.

Description

Technical Field

[0001] The invention belongs to the technical field of coal screening, and in particular relates to a spiral gravity-flow coal crushing and grading integrated device and a use method thereof. Background Art

[0002] The crushing and classification of coal particles have always been an important link in the field of clean coal utilization, which determines the subsequent sorting process and deep processing and utilization of coal. The crushing of coal particles is to promote the separation of organic matter and inorganic minerals in coal, providing a prerequisite for subsequent sorting. The purpose of coal classification is mainly to meet the requirements of the feed size for subsequent sorting.

[0003] At present, the traditional coal crushing and grading operations are relatively independent. For example, in the existing technology:

[0004] CN201921746943.3 discloses a coal block crusher for coal mines, including a jaw crusher and at least one crushing assembly. Each crushing assembly includes a conical cylinder, a rotating shaft, a plurality of first fixed teeth, a plurality of second fixed teeth, and a driving member. The interior of the conical cylinder is hollow and open at both ends. The large diameter end of the conical cylinder is connected to the discharge end of the jaw crusher. One end of the rotating shaft is rotatably inserted in the conical cylinder along the axial direction of the conical cylinder. The first fixed teeth are connected to the inner wall of the conical cylinder and are evenly arranged along the circumference of the first fixed teeth; the second fixed teeth are connected to the outer wall of the rotating shaft along the axial direction of the rotating shaft and are evenly arranged along the circumference of the rotating shaft. The driving member is connected to the rotating shaft for driving the rotating shaft to rotate along its own axis.

[0005] CN202022126533.8 discloses a coal screening machine, including a base, a support column fixedly installed on the upper surface of the base, a buffer column is arranged on the top of the support column, a spring is arranged on the surface of the buffer column, a fixed block is fixedly installed on the top of the buffer column, and a screen box is fixedly installed on one side of the fixed block.

[0006] From the above comparison, it can be seen that at present, most crushing and grading equipment adopts mechanical methods, and the crushing and grading equipment is relatively independent, lacking integrated crushing and grading devices, resulting in high energy consumption in the crushing and grading process, and the corresponding processing and utilization costs are high, which is not conducive to the scale and industrialization of coal processing and utilization technology. At the same time, the equipment used is complex in structure, difficult for daily maintenance, and the operation process is relatively cumbersome, making it difficult to operate continuously.

[0007] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0008] The purpose of the present invention is to provide a spiral self-flowing coal crushing and grading integrated device and a method of use, so as to at least solve the problems that the current crushing and grading equipment are relatively independent and have high energy consumption.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A spiral self-flowing coal crushing and grading integrated device, the integrated device comprising:

[0011] A primary feeding tray, the primary feeding tray is used to hold the uncrushed and unclassified coal, and a feeding port is provided at the bottom of the primary feeding tray;

[0012] The integrated crushing and grading unit is arranged below the primary feeding tray, and the coal dropped from the feeding port of the primary feeding tray enters the integrated crushing and grading unit;

[0013] The integrated crushing and grading unit comprises a spiral tube, and a friction crushing unit is arranged on the inner wall of the spiral tube, so that when the coal falls from the spiral tube under the action of gravity, it hits the friction crushing unit to crush the coal;

[0014] The lowermost end of the bolt tube is provided with a discharge port, and the angle between the tangent line at the discharge port and the horizontal plane is an acute angle. The discharge port is used to give the coal an initial horizontal velocity when discharging, and the larger the coal particles, the smaller the initial horizontal velocity.

[0015] As described above, the spiral self-flowing coal crushing and grading integrated device preferably further comprises a rotating motor, the output end of which is located on the axis of the spiral tube, and the output end of the rotating motor is connected to the spiral tube so that the rotating motor drives the spiral tube to rotate around its own axis.

[0016] As described above, in the spiral self-flowing coal crushing and grading integrated device, preferably, the friction crushing unit is annular, and the annular friction crushing unit is sleeved on the inner wall of the spiral tube.

[0017] As described above, in the spiral self-flowing coal crushing and grading integrated device, preferably, a plurality of friction crushing units are provided, and the plurality of friction crushing units are evenly distributed inside the spiral tube.

[0018] As described above, the spiral self-flowing coal crushing and grading integrated device, preferably, the integrated device further comprises a secondary feeding tray, the secondary feeding tray is arranged on the top of the spiral tube, and the secondary feeding tray is located at the lower part of the drop opening of the primary feeding tray;

[0019] The material outlet on the secondary feeding tray is butted against the material inlet on the top of the spiral tube.

[0020] As described above, in the spiral self-flowing coal crushing and grading integrated device, preferably, the output end of the rotating motor is fixedly connected to the secondary feeding tray, and the rotating motor drives the secondary feeding tray and the spiral tube to rotate simultaneously.

[0021] As described above, in the spiral self-flowing coal crushing and grading integrated device, preferably, the material outlet of the secondary feed tray is arranged on the periphery of the center of the secondary feed tray, and the material outlet of the secondary feed tray is tangentially connected to the material inlet at the top of the spiral tube.

[0022] As described above, in the spiral self-flowing coal crushing and grading integrated device, preferably, a plurality of feeding openings are arranged at the bottom of the first-stage feeding tray, and an integrated unit is arranged below each feeding opening.

[0023] The spiral self-flowing coal crushing and grading integrated device as described above is preferably provided with a coarse-grained material receiving unit and a fine-grained material receiving unit below the discharge port of the spiral tube;

[0024] The coarse-grained material receiving unit is arranged close to the discharge port, and the fine-grained material receiving unit is arranged far from the discharge port.

[0025] The present application also provides a method for using the spiral self-flowing coal crushing and grading integrated device as described above, the method comprising the following steps:

[0026] Step 1, evenly invert the coal particles into the primary feeding tray;

[0027] Step 2, the coal particles are uniformly fed into the secondary feed tray in the integrated unit through multiple discharge ports at the bottom of the primary feed tray;

[0028] Step 3, turn on the rotating motor, adjust the speed of the rotating shaft according to the particle size, and make the secondary feeding tray and the spiral tube rotate clockwise around the rotating shaft;

[0029] Step 4, when the spiral tube is rotating, the coal particles enter the spiral tube through the secondary feeding plate and move clockwise along the inner wall of the spiral tube. The coal particles rub and collide with the inner wall of the spiral tube and the friction crushing unit, and are crushed;

[0030] Step 5, the crushed coal particles are discharged through the discharge port of the spiral tube, the coarse coal particles fall into the inner coarse particle receiving unit closer to the discharge port, and the fine coal particles fall into the outer fine particle receiving unit farther from the discharge port; thus completing the coarse and fine particle classification of the crushed coal.

[0031] Beneficial effects:

[0032] 1) The integrated device adopts a spiral self-flow method to enable coal particles to complete crushing and grading operations under the action of their own gravity. The structure is relatively simple and energy is saved.

[0033] 2) The integrated device combines the structural characteristics of the rough inner wall of the spiral tube and the friction crushing block to promote friction and collision of coal particles during movement, thereby improving the crushing efficiency of coal particles.

[0034] 3) The integrated device adds an electric rotating device, which reduces the movement speed of coal particles in the spiral tube by adopting a clockwise movement in the same direction as the coal movement, effectively increases the retention time of coal particles in the spiral tube, and enhances the crushing strength of coal particles.

[0035] 4) Based on the difference in the discharge speed of coarse and fine particles, the integrated device adopts the arrangement of inner and outer ring receiving troughs to realize the autonomous separation process of coarse and fine particles in the crushed coal particles, simplify the particle classification process, and realize the integration of coal particle crushing and classification, which is conducive to subsequent scale and industrialization.

[0036] 5) The integrated device adopts the structural feature of multiple crushing and grading integrated units in parallel to establish an integrated equipment for crushing and grading coal particles, which is beneficial to increase the input capacity of the equipment and avoid the disadvantage of insufficient processing capacity of unit equipment.

[0037] 6) The integrated device can control the feeding particle size of coal particles (≥250mm), and combined with the mechanical rotation of the rotating shaft and the spiral motion of the coal particles themselves, it can effectively avoid the clogging of the holes in the spiral tube by the coal particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0039] Figure 1 It is a structural schematic diagram of an integrated device according to an embodiment of the present invention;

[0040] Figure 2 A top view of an integrated device according to an embodiment of the present invention;

[0041] Figure 3 It is a structural schematic diagram of an integrated unit according to an embodiment of the present invention;

[0042] Figure 4 FIG. 1 is a top view of an integrated unit according to an embodiment of the present invention.

[0043] In the figure: 1. Primary feeding tray; 2. Integrated unit; 3. Secondary feeding tray; 4. Spiral tube; 5. Friction crushing unit; 6. Rotating shaft; 7. Rotating motor; 8. Discharging port; 9. Coarse particle receiving unit; 10. Fine particle receiving unit. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0045] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0047] According to a specific embodiment of the present invention, Figure 1-4 As shown, the present invention provides a spiral self-flowing coal crushing and grading integrated device, the integrated device includes: a first-level feeding tray 1, the first-level feeding tray 1 is used to hold uncrushed and graded coal, and the bottom of the first-level feeding tray 1 is provided with a drop port; a crushing and grading integrated unit 2, the crushing and grading integrated unit 2 is arranged below the first-level feeding tray 1, and the coal dropped from the drop port of the first-level feeding tray 1 enters the crushing and grading integrated unit 2; the crushing and grading integrated unit 2 includes a spiral tube 4, and a friction crushing unit 5 is arranged on the inner wall of the spiral tube 4, which is used for the coal to collide with the friction crushing unit 5 when falling from the spiral tube 4 under the action of gravity, so as to crush the coal; the lower end of the bolt tube is provided with a discharge port 8, the angle between the tangent line at the position of the discharge port 8 and the horizontal plane is an acute angle, and the discharge port 8 is used to give the coal a horizontal initial velocity when discharging, and the larger the coal particles, the smaller the horizontal initial velocity.

[0048] After the coal enters the spiral tube 4 from the primary feeding tray 1, the coal spirally descends from top to bottom in the spiral tube 4 under the action of its own gravity; during the descent of the coal, the coal rubs and collides with the friction crushing unit 5 provided in the spiral tube 4, so that the coal is crushed and decomposed step by step during the falling process, and the coal is crushed into particles of different sizes.

[0049] The discharge port 8 of the spiral tube 4 is as close to horizontal as possible, so that the coal particles falling from the discharge port 8 all have an initial velocity in the horizontal direction. Larger coal particles have a smaller initial horizontal velocity, so that the falling point of larger coal particles is closer to the discharge port 8, and smaller coal particles have a smaller initial horizontal velocity, so that the falling point of smaller coal particles is farther from the discharge port 8. This arrangement realizes the graded screening of coal particles of different sizes.

[0050] The integrated device utilizes the natural fall of coal due to gravity, causing the coal body to rub and collide with the friction crushing unit 5 and be crushed, thereby greatly saving energy; at the same time, the discharge port 8 is set nearly horizontally, so that coal particles of different sizes have different landing points, not only realizing the grading and screening of coal particles of different sizes, but also this process is only driven by the gravity of the coal itself, further saving the energy of grading and screening; that is, the integrated device can not only realize the crushing and grading of coal, but also save energy.

[0051] In actual use, the integrated device adopts the structural feature of four crushing and grading integrated units 2 in parallel to establish an integrated crushing and grading device for coal particles, which is conducive to increasing the feed volume of the equipment and avoiding the disadvantage of insufficient processing capacity of the unit equipment. At the same time, the crushing and grading integrated unit 2 adopts a spiral self-flow method to strictly control the feed particle size of the coal particles, and combines the mechanical rotation of the rotating shaft 6 and the spiral motion of the coal particles themselves, so that the coal particles can complete the crushing and grading operation under the action of their own gravity, and effectively avoid the clogging behavior of the coal particles in the spiral tube 4, increase the retention time of the coal particles in the spiral tube 4, and enhance the crushing strength of the coal particles, which is conducive to improving the wide applicability of the crushing and grading integrated equipment and accelerating its industrial promotion process.

[0052] The integrated device further includes a rotating motor 7 , the output end of which is located on the axis of the spiral tube 4 , and the output end of the rotating motor 7 is connected to the spiral tube 4 , so that the rotating motor 7 drives the spiral tube 4 to rotate around its own axis.

[0053] A rotating motor 7 is provided to drive the spiral tube 4 to rotate, thereby giving the coal inside the spiral tube 4 a certain centrifugal force, thereby further increasing the friction between the coal and the tube wall of the spiral tube 4. This not only increases the friction and collision force between the coal and the friction crushing unit 5, making it easier to crush the coal; it also further increases the retention time of the coal in the spiral tube 4, which is beneficial to further crushing and refining the coal.

[0054] In this embodiment, the spiral tube 4 is a right-hand spiral structure, and the rotating motor 7 drives the spiral tube 4 to rotate clockwise; in other embodiments, the spiral tube 4 can also be set to a left-hand spiral structure, and the rotating motor 7 can rotate both counterclockwise and clockwise.

[0055] The friction crushing unit 5 is annular, and the annular friction crushing unit 5 is sleeved on the inner wall of the spiral tube 4. The friction crushing unit 5 is annular and has a rough surface, which not only makes it easier for the coal to rub and collide with the annular friction crushing unit 5; and the annular structure is sleeved inside the spiral tube 4, which will not affect the falling of the spiral tube 4.

[0056] There are multiple friction crushing units 5, and the multiple friction crushing units 5 are evenly distributed inside the spiral tube 4. In this embodiment, there are 12 friction crushing units 5, and the multiple friction crushing units 5 are evenly distributed from top to bottom inside the spiral tube 4, so that the coal particles can be evenly frictionally crushed in the process of falling from top to bottom in the spiral tube 4.

[0057] The integrated device further includes a secondary feeding tray 3, which is arranged on the top of the spiral tube 4 and is located at the lower part of the material drop opening of the primary feeding tray 1; the material outlet on the secondary feeding tray 3 is connected with the material inlet at the top of the spiral tube 4. The cross-sectional area of ​​the secondary feeding tray 3 is larger than the cross-sectional area of ​​the material inlet of the spiral tube 4, so that it is more convenient to receive the coal dropped from the primary feeding tray 1.

[0058] The output end of the rotary motor 7 is fixedly connected to the secondary feeding tray 3 , and the rotary motor 7 drives the secondary feeding tray 3 and the spiral tube 4 to rotate at the same time.

[0059] In this embodiment, the central axis of the secondary feeding tray 3 coincides with the central axis of the spiral tube 4, the rotating shaft 6 of the rotating motor 7 passes through the spiral tube 4 and is connected to the bottom of the secondary feeding tray 3, and the axis of the rotating shaft 6 of the rotating motor 7 coincides with the central axis of the secondary feeding tray 3; that is, the rotating motor 7 drives the secondary feeding tray 3 and the spiral tube 4 to rotate around their own axes at the same time.

[0060] The material outlet of the secondary feeding tray 3 is arranged outside the center of the secondary feeding tray 3, and the material outlet of the secondary feeding tray 3 is tangentially connected to the material inlet at the top of the spiral tube 4. In other words, the material outlet of the secondary feeding tray 3 is arranged to avoid the center of the secondary feeding tray 3, so when the secondary feeding tray 3 is driven by the rotating motor 7 to rotate around its own axis, the material inside the secondary feeding tray 3 will move to the periphery of the secondary feeding tray 3 under the action of centrifugal force, and the material outlet thereon is located outside the center of the secondary feeding tray 3, which makes it easier for coal to enter the spiral tube 4 from the secondary feeding tray 3, that is, it is easier to drop the material.

[0061] A plurality of feeding openings are arranged at the bottom of the primary feeding tray 1, and an integrated unit 2 is arranged under each feeding opening.

[0062] In this embodiment, four drop openings are evenly arranged at the bottom of the primary feed tray 1. In other embodiments, the number of drop openings at the bottom of the primary feed tray 1 can also be set to 2, 3, 5, etc.; a secondary feed tray 3 in the integrated unit 2 is correspondingly arranged below each drop opening. Such an arrangement can greatly improve the crushing and grading efficiency of the integrated device for coal. In this embodiment, the primary feed tray 1 is fixed above the multiple integrated units 2 in a hanging manner.

[0063] A coarse-grained material receiving unit 9 and a fine-grained material receiving unit 10 are arranged below the discharge port 8 of the spiral tube 4 ; the coarse-grained material receiving unit 9 is arranged close to the discharge port 8 , and the fine-grained material receiving unit 10 is arranged far from the discharge port 8 .

[0064] In this embodiment, the coarse-grained material receiving unit 9 is a circular coarse-grained material receiving trough, which surrounds the outer periphery of the spiral tube 4; the fine-grained material receiving unit 10 is a circular fine-grained material receiving trough, which surrounds the outer periphery of the coarse-grained material receiving trough. The cross-sectional areas of the coarse-grained material receiving trough and the fine-grained material receiving trough are both U-shaped. The coarse-grained material receiving trough is closer to the discharge port 8 of the spiral tube 4, and the materials received in this trough are all coarse-grained coal, while the fine-grained material receiving trough is farther from the discharge port 8 of the spiral tube 4, and the materials received in this trough are all fine-grained coal.

[0065] The present application also provides a method for using the above-mentioned spiral self-flowing coal crushing and grading integrated device, the method comprising the following steps:

[0066] Step 1, evenly invert the coal particles into the primary feeding tray 1; in this embodiment, the coal particles have a particle size greater than or equal to 250 mm.

[0067] Step 2: The coal particles are uniformly fed into the secondary feed tray 3 in the integrated unit 2 through multiple discharge ports 8 at the bottom of the primary feed tray 1 .

[0068] Step 3, turn on the rotating motor 7, adjust the speed of the rotating shaft 6 according to the particle size, and make the secondary feeding tray 3 and the spiral tube 4 rotate clockwise around the rotating shaft 6; in this embodiment, the larger the particle, the greater the speed, and the smaller the particle, the smaller the speed, and the running speed of the rotating shaft 6 is directly proportional to the particle size of the feeding particles; to ensure that all the falling materials enter the receiving tray, the speed range is controlled at 50-200r / min.

[0069] Step 4, when the spiral tube 4 is rotating, the coal particles enter the spiral tube 4 through the secondary feeding tray 3 and move clockwise along the inner wall of the spiral tube 4. The coal particles rub and collide with the inner wall of the spiral tube 4 and the friction crushing unit 5 and are crushed.

[0070] Step 5, the crushed coal particles are discharged through the discharge port 8 of the spiral tube 4, the coarse coal particles fall into the inner coarse particle receiving unit 9 closer to the discharge port 8, and the fine coal particles fall into the outer fine particle receiving unit 10 farther from the discharge port 8; thereby completing the coarse and fine particle classification of the crushed coal.

[0071] In summary, in the technical solution of the spiral self-flowing coal crushing and grading integrated device provided by the present invention, the coal, under the action of its own gravity, rubs and collides with the friction crushing unit set in the spiral tube, so that the coal is crushed and decomposed step by step during the falling process, so that the coal is crushed into particles of different sizes. And the coarse and fine particles have different horizontal discharge initial velocities due to their different dead weights, so that the larger coal particles fall closer to the discharge port, and the smaller coal particles fall farther from the discharge port. Such a setting realizes the classification and screening of coal particles of different sizes; the whole process is completed by utilizing the gravity of the coal particles themselves to the maximum extent in conjunction with the rotating motor, which can greatly save energy.

[0072] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. Spiral self-flowing coal crushing and grading integrated device, characterized in that: The integrated device comprises: A first-level feeding tray, the first-level feeding tray is used to hold the coal that has not been crushed and classified, and a feeding port is provided at the bottom of the first-level feeding tray; The integrated crushing and grading unit is arranged below the primary feeding tray, and the coal dropped from the feeding port of the primary feeding tray enters the integrated crushing and grading unit; The integrated crushing and grading unit comprises a spiral tube, and a friction crushing unit is arranged on the inner wall of the spiral tube, so that when the coal falls from the spiral tube under the action of gravity, it hits the friction crushing unit to crush the coal; The lower end of the spiral tube is provided with a discharge port, the angle between the tangent line at the discharge port and the horizontal plane is an acute angle, the discharge port is used to give the coal an initial horizontal velocity when discharging, the larger the coal particles, the smaller the initial horizontal velocity, the integrated device also includes a rotating motor, the output end of the rotating motor is on the axis of the spiral tube, the output end of the rotating motor is connected to the spiral tube, so that the rotating motor drives the spiral tube to rotate around its own axis, the friction crushing unit is annular, and the annular friction crushing unit is sleeved on the inner wall of the spiral tube; The integrated device further comprises a secondary feeding tray, which is arranged on the top of the spiral tube and is located at the lower part of the feeding opening of the primary feeding tray; The material outlet on the secondary feeding tray is connected to the material inlet at the top of the spiral tube; The output end of the rotating motor is fixedly connected to the secondary feeding tray, and the rotating motor drives the secondary feeding tray and the spiral tube to rotate at the same time.

2. The spiral self-flowing coal crushing and grading integrated device according to claim 1 is characterized in that: There are multiple friction and crushing units, and the multiple friction and crushing units are evenly distributed inside the spiral tube.

3. The spiral self-flowing coal crushing and grading integrated device according to claim 1 is characterized in that: The material outlet of the secondary material feeding tray is arranged at the periphery of the center of the secondary material feeding tray, and the material outlet of the secondary material feeding tray is tangentially connected to the material inlet at the top of the spiral tube.

4. The spiral self-flowing coal crushing and grading integrated device according to claim 1 is characterized in that: The bottom of the primary feeding tray is provided with a plurality of feeding openings, and an integrated unit is provided under each feeding opening.

5. The spiral self-flowing coal crushing and grading integrated device according to claim 1 is characterized in that: A coarse-grained material receiving unit and a fine-grained material receiving unit are arranged below the discharge port of the spiral tube; The coarse-grained material receiving unit is arranged close to the discharge port, and the fine-grained material receiving unit is arranged far from the discharge port.

6. The method for using the spiral self-flowing coal crushing and grading integrated device according to any one of claims 1 to 5, characterized in that: The method of use comprises the following steps: Step 1, evenly invert the coal particles into the primary feeding tray; Step 2, the coal particles are uniformly fed into the secondary feed tray in the integrated unit through multiple discharge ports at the bottom of the primary feed tray; Step 3, turn on the rotating motor, adjust the speed of the rotating shaft according to the particle size, and make the secondary feeding tray and the spiral tube rotate clockwise around the rotating shaft; Step 4, when the spiral tube is rotating, the coal particles enter the spiral tube through the secondary feeding plate and move clockwise along the inner wall of the spiral tube. The coal particles rub and collide with the inner wall of the spiral tube and the friction crushing unit, and are crushed; Step 5, the crushed coal particles are discharged through the discharge port of the spiral tube, the coarse coal particles fall into the inner coarse particle receiving unit closer to the discharge port, and the fine coal particles fall into the outer fine particle receiving unit farther from the discharge port; thus completing the coarse and fine particle classification of the crushed coal.

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