CN113305008A

CN113305008A - Gangue letter sorting equipment

Info

Publication number: CN113305008A
Application number: CN202110646265.9A
Authority: CN
Inventors: 郭永存; 周军鹏; 王爽; 胡坤; 刘宝莹
Original assignee: Anhui University of Science and Technology; Anhui Zhongke Optic Electronic Color Sorter Machinery Co Ltd
Current assignee: Anhui University of Science and Technology; Anhui Zhongke Optic Electronic Color Sorter Machinery Co Ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-08-27
Anticipated expiration: 2041-06-10
Also published as: CN113305008B

Abstract

The invention relates to the field of industrial production, in particular to a coal gangue sorting device, which comprises a shell, a conveying mechanism, an air blowing mechanism, a vibrating mechanism and a sorting mechanism, wherein the vibrating mechanism and the sorting mechanism are matched for use, when the device is powered on during work, coal gangue to be sorted is conveyed to a conveying belt, a motor drives a first roller shaft to rotate, the first roller shaft drives a conveying belt to move, the conveying belt drives a second roller shaft to rotate, a top block extrudes a first spring and shrinks towards a first groove under the pressure of the conveying belt, the second roller shaft continuously rotates, when the top block is not extruded by the inner side of the conveying belt any more, the top block extends outwards under the elastic force of the first spring and impacts the inner side of the conveying belt, so that the conveying belt shakes to drive the coal gangue on the conveying belt to vibrate, at the moment, the size of the coal gangue with smaller relative mass falls into a gap between convex strips under the vibration effect, tiny coal gangue attached to the conveying belt is also shaken to be discharged from the discharge port, and the sorting effect of the equipment is improved.

Description

Gangue letter sorting equipment

Technical Field

The invention relates to the field of industrial production, in particular to coal gangue sorting equipment.

Background

The coal gangue is solid waste discharged in the coal mining process and the coal washing process, and is a black and gray rock which has lower carbon content and is harder than coal and is associated with a coal bed in the coal forming process; the coal gangue is mainly used for producing building materials such as lightweight aggregate of gangue cement and concrete, refractory bricks and the like, and can also be used for recovering coal, co-firing coal and gangue for power generation, preparing chemical products such as crystalline aluminum chloride, water glass and the like, extracting precious and rare metals, and also can be used as a fertilizer.

The Chinese patent with application number 202011087073.0 provides a coal gangue sorting device, which combines the vibration effect of a vibration structure on a conveyor belt, so that smaller granular coal gangue can be deposited below a material, one side of a sorting plate transversely arranged above the conveyor belt is of an arc structure, large granular coal gangue above the material can be guided and is discharged through one side of a supporting side frame, and meanwhile, the sorting plate for sorting the coal gangue can be used for adjusting the height, so that the sorting operation can be performed on the coal gangue with different granular coal gangue, and the sorting efficiency is improved; however, when the device is used, if only a small amount of small-particle coal gangue exists in the material to be sorted, the small-particle coal gangue is positioned in the gap of the large-particle coal gangue at the bottom of the material, and even if the height of the sorting plate is jumped to be low, the coal gangue with different volumes is difficult to be directly separated, because the sorting effect is poor.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides coal gangue sorting equipment.

The technical scheme adopted by the invention for solving the technical problems is as follows: a coal gangue sorting device comprises a shell, a conveying mechanism, a blowing mechanism, a vibrating mechanism and a sorting mechanism, wherein a discharge port is formed in the bottom of the shell, the conveying mechanism is arranged in the shell and comprises a motor, a conveying belt, a first roller shaft and a second roller shaft, the motor is arranged on one side of the shell, a transmission shaft of the motor is fixedly connected with one end of the first roller shaft, two ends of the first roller shaft and two ends of the second roller shaft are rotatably connected with two sides of the shell respectively, two ends of the conveying belt are sleeved with the first roller shaft and the second roller shaft respectively, and the conveying belt is in rolling connection with the first roller shaft and the second roller shaft; sorting mechanism includes sand grip and sorting plate, the surface of conveyer belt evenly is equipped with a plurality of sand grips along its width direction, the extending direction of sand grip is unanimous with the length direction of conveyer belt, the both ends fixed mounting of sorting plate is in the both sides of casing, just the sand grip setting on the bottom surface laminating conveyer belt surface of sorting plate. The during operation, with equipment switch on, the gangue that will treat the sorting transports to the conveyer belt on, the motor drives first roller and rotates, first roller drives the conveyer belt motion, the conveyer belt drives the gangue and moves left, at this moment, tiny granule falls into the clearance between the sand grip in the gangue, the gangue that the size is greater than adjacent sand grip is located the top, the conveyer belt continues to transport, tiny gangue between the sand grip falls down from the discharge gate under the effect of gravity, the great gangue of size is shoveled by the sorting plate, remove left along the sorting plate and be collected under the impetus of follow-up gangue, and then reach the effect of sorting the gangue.

Specifically, one end of the sorting plate attaching convex strip is provided with a downward inclined plane. The arrangement of the inclined plane at one end of the sorting plate enables massive coal gangue to be shoveled more easily, and meanwhile, fine coal gangue falls into the sorting plate and then slides onto the conveying belt under the action of gravity, so that the sorting efficiency of the equipment is improved.

Specifically, the horizontal height of the first roller shaft is higher than that of the second roller shaft, and the included angle between the part, located between the first roller shaft and the second roller shaft, of the conveyor belt and the horizontal plane is 3-5 degrees. The conveyer belt can increase separation efficiency with certain gradient operation, under the effect of gravity for the removal rate of gangue, simultaneously, can not fall and too fast lead to too much tiny gangue to fall from the sorting plate.

Specifically, vibration mechanism includes kicking block and first spring, the surface of second roller evenly is equipped with a plurality of first recesses along its circumference, be equipped with the kicking block in the first recess, the bottom of kicking block is equipped with first spring, the both ends of first spring respectively with kicking block and first recess fixed connection. During operation, the power is switched on for the equipment, the coal gangue to be sorted is transported to the conveying belt, the motor drives the first roller shaft to rotate, the first roller shaft drives the conveying belt to move, the conveying belt drives the second roller shaft to rotate, the ejector block extrudes the first spring under the pressure of the conveying belt and shrinks towards the first groove, the second roller shaft continuously rotates, when the ejector block is not extruded by the inner side of the conveying belt any more, the first spring outwards stretches out and impacts the inner side of the conveying belt under the elastic action of the first spring, so that the conveying belt shakes, the coal gangue on the conveying belt is driven to vibrate, at the moment, the size is small, the coal gangue with small relative quality falls into a gap between the convex strips under the vibration effect, meanwhile, the attached small coal gangue on the conveying belt is also shaken to be discharged from the discharge port, and the sorting effect of the equipment is improved.

Specifically, the air blowing mechanism comprises a piston rod, an air collecting cavity, an air guide block, a first air guide pipe, a second air guide pipe and an air blowing pipe, the air collecting cavity is arranged in the middle of the second roller shaft, a piston cavity is arranged at the bottom of the first groove and communicated with the air collecting cavity, a piston rod is arranged in the piston cavity, the bottom of the ejector block is fixedly connected with one end of the piston rod, a first through groove is formed in the ejector block and the piston rod and communicated with the piston cavity, a first one-way valve is arranged in the first through groove, a rotating shaft is arranged in the middle of one end of the second roller shaft and penetrates through one side of the shell and is rotatably connected with the shell, a first cavity channel is arranged in the rotating shaft, the air guide block is sleeved on the surface of the rotating shaft in a sealing manner, a first cavity is arranged in the air guide block and is communicated with the air collecting cavity, and the first cavity channel is communicated with the first cavity, first air duct and air guide piece fixed connection, just first air duct and first cavity intercommunication, first air duct and first air duct fixed connection and intercommunication, the second air duct sets up the top at the separation board, the surface of second air duct evenly is equipped with a plurality of gas blow pipes, the gas blow pipe slope sets up and its end is aimed at the separation board, install the second check valve in the gas blow pipe. When the coal gangue sorting device works, the device is powered on, coal gangue to be sorted is conveyed to the conveying belt, the motor drives the first roller shaft to rotate, the first roller shaft drives the conveying belt to move, the conveying belt drives the second roller shaft to rotate, the ejector block extrudes the first spring under the pressure of the conveying belt and shrinks towards the first groove, the ejector block drives the piston rod to extrude air in the piston cavity, the air is ejected from the air blowing pipe along the piston cavity, the air collecting cavity, the first cavity channel, the first cavity, the first air guide pipe and the second air guide pipe, under the action of air flow, residual fine coal gangue on the sorting plate is blown down onto the conveying belt due to small relative mass, and then falls down from the discharge port under the action of gravity along with the movement of the conveying belt, so that the sorting efficiency and the sorting effect are improved.

When the coal gangue sorting machine works, the equipment is powered on, coal gangue to be sorted is conveyed to the conveying belt, the motor drives the first roller shaft to rotate, the first roller shaft drives the conveying belt to move, the conveying belt drives the second roller shaft to rotate, the ejector block extrudes the first spring under the pressure of the conveying belt and shrinks towards the first groove, the second roller shaft continuously rotates, when the ejector block is not extruded by the inner side of the conveying belt any more, the ejector block extends outwards under the elastic force of the first spring and impacts the inner side of the conveying belt, so that the conveying belt shakes, the coal gangue on the conveying belt is driven to vibrate, at the moment, the size is smaller, the coal gangue with smaller relative mass falls into gaps between the convex strips under the vibration effect, meanwhile, fine coal gangue attached to the conveying belt is shaken to be discharged from the discharge port, the conveying belt drives the coal gangue to move leftwards, and the coal gangue with the size larger than the adjacent convex strips is positioned at the top, the conveyor belt continues to convey, the fine coal gangue between the convex strips falls down from the discharge hole under the action of gravity, the coal gangue with larger size is shoveled by the sorting plate, and moves leftwards along the sorting plate under the pushing action of the subsequent coal gangue and is collected, so that the effect of sorting the coal gangue is achieved; simultaneously, the kicking block receives the first spring of pressure extrusion of conveyer belt and to the shrink of first recess, and the kicking block drives the air of piston rod extrusion piston intracavity, and the air is along piston chamber, gas collection chamber, first chamber way, first cavity, first air duct and follow the gas blow pipe blowout, under the effect of air current, remaining tiny gangue on the sorting plate is blown down to the conveyer belt because relative quality is less, along with the conveyer belt motion afterwards, falls down from the discharge gate under the effect of gravity, has increased separation efficiency and sorting effect.

The invention has the beneficial effects that:

(1) when the coal gangue sorting equipment is used, the equipment is powered on during work, coal gangue to be sorted is conveyed to the conveying belt, the motor drives the first roller shaft to rotate, the first roller shaft drives the conveying belt to move, the conveying belt drives the coal gangue to move leftwards, fine particles in the coal gangue fall into gaps between the convex strips, the coal gangue with the size larger than that of the adjacent convex strips is positioned at the top of the convex strips, the conveying belt continues to convey, the fine coal gangue between the convex strips falls from the discharge hole under the action of gravity, the coal gangue with the larger size is shoveled by the sorting plate, and the coal gangue moves leftwards along the sorting plate and is collected under the pushing action of subsequent coal gangue, so that the effect of sorting the coal gangue is achieved.

(2) According to the coal gangue sorting equipment, the sorting plate is used, the inclined plane at one end of the sorting plate enables large coal gangue to be easily shoveled, meanwhile, small coal gangue falling into the sorting plate can also slide onto the conveying belt under the action of gravity, and the sorting efficiency of the equipment is improved.

(3) The coal gangue sorting equipment comprises a vibrating mechanism, a sorting mechanism, a first roller shaft, a second roller shaft, a first spring, a second roller shaft, a first spring, a second roller shaft, a second spring, a third roller shaft, a fourth roller shaft, a fifth roller shaft, a sixth roller shaft, a fifth roller shaft, a sixth roller shaft, a fourth roller shaft, a third roller shaft, a fourth roller shaft, a third roller shaft, a fourth roller shaft, a third roller shaft, a fourth roller shaft, a third roller shaft, a fourth roller shaft, a third roller shaft, a fourth, the sorting effect of the equipment is increased.

(4) When the coal gangue sorting equipment is used, the air blowing mechanism is used, when the equipment is operated, the equipment is powered on, coal gangue to be sorted is conveyed to the conveying belt, the motor drives the first roller shaft to rotate, the first roller shaft drives the conveying belt to move, the conveying belt drives the second roller shaft to rotate, the ejector block extrudes the first spring under the pressure of the conveying belt and shrinks towards the first groove, the ejector block drives the piston rod to extrude air in the piston cavity, the air is ejected from the air blowing pipe along the piston cavity, the air collecting cavity, the first cavity channel, the first cavity, the first air guide pipe and the first air guide pipe, and under the action of air flow, fine coal gangue remained on the sorting plate is blown down onto the conveying belt due to relatively small mass and then falls down from the discharge port under the action of gravity along with the movement of the conveying belt, so that the sorting efficiency and the sorting effect are improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of an overall structure of a coal gangue sorting apparatus provided by the present invention;

FIG. 2 is a schematic view of the internal structure shown in FIG. 1;

FIG. 3 is a schematic view of the attachment of the vibration mechanism shown in FIG. 2;

FIG. 4 is an enlarged view of portion A of FIG. 2;

FIG. 5 is an enlarged view of the portion B shown in FIG. 3;

FIG. 6 is a schematic view of the connection between the air guide block and the shaft shown in FIG. 4;

FIG. 7 is a schematic view of the structure of the insufflation tube shown in FIG. 4.

In the figure: 1. a housing; 11. a discharge port; 2. a transport mechanism; 21. a motor; 22. a conveyor belt; 23. a first roller shaft; 24. a second roller shaft; 241. a first groove; 242. a piston cavity; 243. a rotating shaft; 2431. a first channel; 3. a blowing mechanism; 31. a piston rod; 32. a gas collection cavity; 33. a gas guide block; 331. a first cavity; 34. a first air duct; 35. a second air duct; 36. an air blowing pipe; 361. a second one-way valve; 4. a vibration mechanism; 41. a top block; 411. a first through groove; 412. a first check valve; 42. a first spring; 5. a sorting mechanism; 51. a convex strip; 52. and (4) sorting plates.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-7, the coal gangue sorting device according to the present invention includes a housing 1, a conveying mechanism 2, an air blowing mechanism 3, a vibrating mechanism 4 and a sorting mechanism 5, wherein a discharge port 11 is disposed at the bottom of the housing 1, the conveying mechanism 2 is disposed in the housing 1, the conveying mechanism 2 includes a motor 21, a conveyor belt 22, a first roller shaft 23 and a second roller shaft 24, the motor 21 is disposed at one side of the housing 1, a transmission shaft of the motor 21 is fixedly connected to one end of the first roller shaft 23, two ends of the first roller shaft 23 and two ends of the second roller shaft 24 are rotatably connected to two sides of the housing 1, two ends of the conveyor belt 22 are respectively sleeved to the first roller shaft 23 and the second roller shaft 24, and the conveyor belt 22 is connected to the first roller shaft 23 and the second roller shaft 24 in a rolling manner; sorting mechanism 5 includes sand grip 51 and sorting plate 52, the surface of conveyer belt 22 evenly is equipped with a plurality of sand grips 51 along its width direction, the extending direction of sand grip 51 is unanimous with the length direction of conveyer belt 22, the both ends fixed mounting of sorting plate 52 is in the both sides of casing 1, just the sand grip 51 setting on the bottom surface laminating conveyer belt 22 surface of sorting plate 52. The during operation, with equipment switch on, the gangue that will treat the sorting transports to conveyer belt 22 on, motor 21 drives first roller 23 and rotates, first roller 23 drives the conveyer belt 22 motion, conveyer belt 22 drives the gangue and moves left, this moment, tiny granule falls into the clearance between sand grip 51 in the gangue, the gangue that the size is greater than adjacent sand grip 51 is located the top, conveyer belt 22 continues to transport, tiny gangue between sand grip 51 falls down from discharge gate 11 under the effect of gravity, the great gangue of size is shoveled by sorting plate 52, remove left along sorting plate 52 and be collected under the impetus of follow-up gangue, and then reach the effect of sorting the gangue.

Specifically, a downward slope is provided at one end of the sorting plate 52 attached to the protruding strip 51. The arrangement of the inclined plane at one end of the sorting plate 52 enables the massive coal gangue to be shoveled more easily, and meanwhile, the fine coal gangue falls into the sorting plate 52 and then slides onto the conveyor belt 22 under the action of gravity, so that the sorting efficiency of the equipment is increased.

Specifically, the horizontal height of the first roller shaft 23 is higher than that of the second roller shaft 24, and the included angle between the part of the conveyor belt 22, which is positioned between the first roller shaft 23 and the second roller shaft 24, and the horizontal plane is 3-5 degrees. The conveyor belt 22 runs at a certain inclination to increase the separation efficiency, so that the moving speed of the coal gangue is increased under the action of gravity, and meanwhile, the excessive fine coal gangue cannot fall off from the separation plate 52 due to too fast falling.

Specifically, the vibration mechanism 4 includes a top block 41 and a first spring 42, the surface of the second roller shaft 24 is evenly provided with a plurality of first grooves 241 along the circumference thereof, the top block 41 is arranged in the first groove 241, the bottom of the top block 41 is provided with the first spring 42, and the two ends of the first spring 42 are respectively fixedly connected with the top block 41 and the first groove 241. When the coal gangue sorting machine works, the power supply is switched on, the coal gangue to be sorted is conveyed to the conveyor belt 22, the motor 21 drives the first roller shaft 23 to rotate, the first roller shaft 23 drives the conveyor belt 22 to move, the conveyor belt 22 drives the second roller shaft 24 to rotate, the top block 41 is pressed by the conveyor belt 22 to press the first spring 42 and contract toward the first groove 241, the second roller shaft 24 continues to rotate, and when the top block 41 is no longer pressed by the inner side of the conveyor belt 22, and is outwardly protruded by the elastic force of the first spring 42 and hits the inside of the conveyor belt 22, so that the conveyor belt 22 is shaken, thereby driving the coal gangue on the conveyor belt 22 to vibrate, at the moment, the coal gangue with smaller size and smaller relative mass falls into the clearance between the convex strips 51 under the vibration effect, meanwhile, the tiny coal gangue attached to the conveyor belt 22 is shaken down and discharged from the discharge port 11, so that the sorting effect of the equipment is improved.

Specifically, the air blowing mechanism 3 includes a piston rod 31, a gas collecting cavity 32, an air guide block 33, a first air guide tube 34, a second air guide tube 35 and an air blowing tube 36, the gas collecting cavity 32 is disposed at the middle part of the second roller shaft 24, a piston cavity 242 is disposed at the bottom of the first groove 241, the piston cavity 242 is communicated with the gas collecting cavity 32, the piston rod 31 is disposed in the piston cavity 242, the bottom of the top block 41 is fixedly connected with one end of the piston rod 31, a first through groove 411 is disposed in the top block 41 and the piston rod 31, the first through groove 411 is communicated with the piston cavity 242, a first check valve 412 is disposed in the first through groove 411, a rotating shaft 243 is disposed at the middle part of one end of the second roller shaft 24, the rotating shaft 243 penetrates through one side of the housing 1 and is rotatably connected with the housing, a first cavity channel 2431 is disposed in the rotating shaft 243, the air guide block 33 is hermetically sleeved on the surface of the rotating shaft 243, a first cavity 331 is disposed in the air guide block 33, first chamber way 2431 and gas collecting chamber 32 intercommunication, just first chamber way 2431 and first cavity 331 intercommunication, first air duct 34 and air guide block 33 fixed connection, just first air duct 34 and first cavity 331 intercommunication, first air duct 34 and first air duct 34 fixed connection and intercommunication, second air duct 35 sets up the top at sorting plate 52, the surface of second air duct 35 evenly is equipped with a plurality of gas blow pipes 36, gas blow pipe 36 slope sets up and its end aligns sorting plate 52, install second check valve 361 in the gas blow pipe 36. When the coal gangue sorting device works, the device is powered on, coal gangue to be sorted is conveyed to the conveyor belt 22, the motor 21 drives the first roller shaft 23 to rotate, the first roller shaft 23 drives the conveyor belt 22 to move, the conveyor belt 22 drives the second roller shaft 24 to rotate, the ejector block 41 is pressed by the pressure of the conveyor belt 22 to extrude the first spring 42 and contract towards the first groove 241, the ejector block 41 drives the piston rod 31 to extrude air in the piston cavity 242, the air is blown onto the conveyor belt 22 along the piston cavity 242, the air collection cavity 32, the first cavity channel 2431, the first cavity 331, the first air guide pipe 34 and the second air guide pipe 35 and is sprayed out from the air blowing pipe 36, under the action of air flow, the residual fine coal gangue on the sorting plate 52 is blown onto the conveyor belt 22 due to the relatively small mass, then, the coal gangue falls down from the discharge port 11 along with the movement of the conveyor belt 22 and the action of gravity, and the sorting efficiency and the sorting effect are improved.

When the coal gangue sorting machine works, the power supply of the equipment is switched on, the coal gangue to be sorted is conveyed to the conveyor belt 22, the motor 21 drives the first roller shaft 23 to rotate, the first roller shaft 23 drives the conveyor belt 22 to move, the conveyor belt 22 drives the second roller shaft 24 to rotate, the ejector block 41 is pressed by the conveyor belt 22 to extrude the first spring 42 and contract towards the first groove 241, the second roller shaft 24 continuously rotates, when the ejector block 41 is not extruded by the inner side of the conveyor belt 22 any more, the ejector block extends outwards under the action of the elastic force of the first spring 42 and impacts the inner side of the conveyor belt 22, so that the conveyor belt 22 shakes to drive the coal gangue on the conveyor belt 22 to vibrate, at the moment, the coal gangue with small size and relatively small mass falls into a gap between the convex strips 51 under the vibration effect, meanwhile, the fine coal gangue attached to the conveyor belt 22 is shaken to be discharged from the discharge hole 11, and the conveyor belt 22 drives the coal gangue to move leftwards, the coal gangue with the size larger than that of the adjacent convex strips 51 is positioned at the top, the conveyor belt 22 continues to convey, the small coal gangue among the convex strips 51 falls down from the discharge hole 11 under the action of gravity, the large coal gangue is shoveled by the sorting plate 52, and the coal gangue moves leftwards along the sorting plate 52 and is collected under the pushing action of the subsequent coal gangue, so that the effect of sorting the coal gangue is achieved; meanwhile, the top block 41 is pressed by the pressure of the conveyor belt 22 and shrinks towards the first groove 241, the top block 41 drives the piston rod 31 to press the air in the piston cavity 242, the air is sprayed out from the air blowing pipe 36 along the piston cavity 242, the air collecting cavity 32, the first cavity channel 2431, the first cavity 331, the first air duct 34 and the second air duct 35, and under the action of the air flow, the residual fine coal gangue on the sorting plate 52 is blown down onto the conveyor belt 22 due to the small relative mass, and then moves along with the conveyor belt 22 and falls down from the discharge port 11 under the action of gravity, so that the sorting efficiency and the sorting effect are increased.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A coal gangue sorting equipment is characterized in that: comprises a shell (1), a conveying mechanism (2), an air blowing mechanism (3), a vibrating mechanism (4) and a sorting mechanism (5), a discharge hole (11) is arranged at the bottom of the shell (1), the conveying mechanism (2) is arranged in the shell (1), and the transmission mechanism (2) comprises a motor (21), a transmission belt (22), a first roller shaft (23) and a second roller shaft (24), the motor (21) is arranged on one side of the shell (1), a transmission shaft of the motor (21) is fixedly connected with one end of the first roll shaft (23), and the two ends of the first roll shaft (23) and the second roll shaft (24) are respectively and rotatably connected with the two sides of the shell (1), two ends of the conveyor belt (22) are respectively sleeved with a first roller shaft (23) and a second roller shaft (24), the conveying belt (22) is in rolling connection with a first roller shaft (23) and a second roller shaft (24); sorting mechanism (5) are including sand grip (51) and sorting plate (52), the surface of conveyer belt (22) evenly is equipped with a plurality of sand grips (51) along its width direction, the extending direction of sand grip (51) is unanimous with the length direction of conveyer belt (22), the both ends fixed mounting of sorting plate (52) is in the both sides of casing (1), just sand grip (51) setting on the bottom surface laminating conveyer belt (22) surface of sorting plate (52).

2. The coal refuse sorting plant of claim 1, characterized in that: one end of the sorting plate (52) attached with the convex strip (51) is provided with a downward inclined plane.

3. The coal refuse sorting plant of claim 1, characterized in that: the horizontal height of the first roller shaft (23) is higher than that of the second roller shaft (24), and the included angle between the part, located between the first roller shaft (23) and the second roller shaft (24), of the conveyor belt (22) and the horizontal plane is 3-5 degrees.

4. The coal refuse sorting plant of claim 1, characterized in that: vibration mechanism (4) are including kicking block (41) and first spring (42), the surface of second roller (24) evenly is equipped with a plurality of first recesses (241) along its circumference, be equipped with kicking block (41) in first recess (241), the bottom of kicking block (41) is equipped with first spring (42), the both ends of first spring (42) respectively with kicking block (41) and first recess (241) fixed connection.

5. The coal refuse sorting equipment of claim 4, characterized in that: the air blowing mechanism (3) comprises a piston rod (31), an air collecting cavity (32), an air guide block (33), a first air guide pipe (34), a second air guide pipe (35) and an air blowing pipe (36), the air collecting cavity (32) is arranged in the middle of the second roller shaft (24), a piston cavity (242) is arranged at the bottom of the first groove (241), the piston cavity (242) is communicated with the air collecting cavity (32), a piston rod (31) is arranged in the piston cavity (242), the bottom of the ejector block (41) is fixedly connected with one end of the piston rod (31), a first through groove (411) is arranged in the ejector block (41) and the piston rod (31), the first through groove (411) is communicated with the piston cavity (242), a first one-way valve (412) is arranged in the first through groove (411), a rotating shaft (243) is arranged in the middle of one end of the second roller shaft (24), and the rotating shaft (243) penetrates through one side of the shell (1) and is rotatably connected with the shell, a first cavity channel (2431) is arranged in the rotating shaft (243), the air guide block (33) is sleeved on the surface of the rotating shaft (243) in a sealing way, a first cavity (331) is arranged in the air guide block (33), the first cavity channel (2431) is communicated with the air collection cavity (32), the first cavity channel (2431) is communicated with the first cavity (331), the first air duct (34) is fixedly connected with the air guide block (33), the first air duct (34) is communicated with the first cavity (331), the second air duct (35) is fixedly connected and communicated with the first air duct (34), the second air duct (35) is arranged at the top of the sorting plate (52), a plurality of air injection pipes (36) are uniformly arranged on the surface of the second air duct (35), the gas injection pipe (36) is obliquely arranged, the tail end of the gas injection pipe is aligned to the sorting plate (52), and a second one-way valve (361) is installed in the gas injection pipe (36).