A coal washing plant

Abstract

The present application relates to coal washing technology field, especially a kind of coal washing device, including flotation machine shell, multiple bearing seats are installed on the upper end of flotation machine shell, rotating shaft is rotatably connected in the inside of bearing seat, rotating shaft outer wall is equipped with flotation column, stirring assembly is installed in the middle of flotation column, multiple flushing components are equipped on the outer wall of flotation machine shell, one end of flotation column is equipped with bubble removal assembly, bubble removal assembly includes portal frame, portal frame bottom surface is fixedly connected with the inner wall of flotation machine shell, two sliding blocks are slidably connected on the portal frame, fixed block is arranged between the two sliding blocks, two through slots are formed in the fixed block, push block is slidably connected in the through slot, two scrapers are respectively arranged on the two sides of fixed block, two connecting blocks are fixedly arranged on the scraper. Adapt to the change of foam layer under different coal quality and working condition, scrape foam layer of different thicknesses, ensure that target clean coal particles are fully collected, reduce the loss of clean coal caused by bottom foam residue, improve the separation precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal washing, in particular to a coal washing device. BACKGROUND

[0002] In the coal washing process, the flotation link realizes the separation of clean coal and gangue through foam separation. The principle is to change the hydrophobicity of the coal particles by the action of reagents, so that the target clean coal particles adhere to the surface of the bubbles to form a foam layer, and then the foam layer is scraped and separated by a bubble removal assembly, and finally qualified clean coal is obtained. The control of the thickness of the foam layer is one of the key factors affecting the separation effect.

[0003] Through the engagement between the gears, the crushing and screening can be driven by one driving source. The mechanical arm transports the large particle coal in the basket to the crushing opening through the cooperation of the gear and rack. The bottom end of the basket is provided with a brake door device, which can automatically unload.

[0004] However, in the process of use, it is found that the scraper structure is relatively fixed and cannot adapt to the change of the foam layer under different coal quality and working conditions, which easily leads to loss of clean coal or excessive ash content of tailings, affecting the continuity of separation, and easily causing the quality of clean coal to be substandard due to lagging adjustment, which is difficult to meet the needs of coal washing. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides a coal washing device which can conveniently and flexibly adjust the depth of the scraper, adapt to the change of the foam layer under different coal quality and working conditions, scrape the foam layer of different thicknesses, ensure the full collection of target clean coal particles, reduce the loss of clean coal caused by residual foam at the bottom, and reduce the scraping of the lower slurry, prevent the mixing of tailings ash into clean coal to cause substandard quality, and improve the separation precision.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a coal washing device, comprising a flotation machine shell, a plurality of bearing seats are installed on the upper end of the flotation machine shell, a rotating shaft is rotatably connected inside the bearing seat, a flotation column is sleeved on the outer wall of the rotating shaft, a stirring assembly is installed in the middle of the flotation column, and a plurality of flushing assemblies are arranged on the outer wall of the flotation machine shell.

[0007] One end of the flotation column is provided with a bubble removal assembly, the bubble removal assembly comprises a portal frame, the bottom surface of the portal frame is fixedly connected with the inner wall of the flotation machine shell, two sliding blocks are slidingly connected on the portal frame, a fixed block is arranged between the two sliding blocks, two through grooves are formed in the fixed block, a push block is slidingly connected in the through grooves, two scrapers are arranged on the two sides of the fixed block, two connecting blocks are fixedly arranged on the scraper, a hinge seat is fixedly arranged on the push block and the connecting block, and a connecting rod is rotatably connected between the two hinge seats.

[0008] Preferably, a plurality of flotation chambers are arranged in the flotation machine shell, a gate is arranged between two adjacent flotation chambers, the rotating shaft, the flotation column and the stirring assembly are arranged in the flotation chamber respectively, a plurality of first servo motors are mounted on the top surface of the flotation machine shell, a traction wheel is sleeved on the output shaft of the first servo motor and the upper end of the rotating shaft respectively, and the wheel grooves of the two traction wheels are frictionally connected through a belt.

[0009] Through the above technical scheme, the output shaft of the first servo motor drives the rotating shaft in the flotation chamber to rotate through the friction transmission of the traction wheel and the belt, thereby providing power for subsequent stirring, air inlet and other links.

[0010] Preferably, a plurality of protective blocks are arranged in an annular array structure on the upper end of the flotation column, the inner wall of the protective block is sawtooth-shaped, a guide impeller is mounted on the bottom surface of the rotating shaft, and the guide impeller is located in the partition cage.

[0011] Preferably, the lower end of the rotating shaft is hollow, a sleeve is rotatably connected to the outer wall of the rotating shaft, an air inlet pipe is fixedly arranged on the flotation column, the air inlet pipe is in communication with the inner portion of the lower end of the flotation column, a shunt is formed in the air inlet pipe, the air inlet pipe is in communication with the sleeve, a plurality of air inlet grooves are formed in the lower end of the rotating shaft, the sleeve is in communication with the air inlet grooves, an air distributor is communicated with the bottom surface of the rotating shaft, an arc-shaped dispersion block is fixedly arranged on the outer peripheral wall of the air distributor, and the top surface of the arc-shaped dispersion block is fixedly connected with the bottom surface of the guide impeller.

[0012] Through the above technical scheme, the guide impeller at the bottom is driven to rotate by the rotating shaft, the air distributor rotates synchronously, and the arc-shaped dispersion block on the outer peripheral wall of the air distributor rotates with the guide impeller, so that the air discharged from the air distributor is broken into fine bubbles.

[0013] Preferably, the stirring assembly comprises two gear rings, the gear rings are sleeved on the outer peripheral wall of the rotating shaft, a plurality of gears are meshingly connected on the gear rings, a protective box is arranged between the two gears, a worm is arranged in the protective box, and the two ends of the worm are rotatably connected with the protective box.

[0014] Preferably, the two ends of the worm are fixedly connected with gears, the worm is meshingly connected with a worm wheel, the worm wheel is sleeved with a stirring rod, and the stirring rod is rotatably connected with the protection box and the flotation column.

[0015] Through the technical scheme, the gear ring meshes with the gear to drive the gear and the coaxially fixed worm to rotate, the worm meshes with the worm wheel to finally drive the stirring rod sleeved on the worm wheel to rotate, and the ore pulp and the flotation reagent are fully mixed to create conditions for the subsequent fine coal particles to attach bubbles.

[0016] Preferably, the flushing assembly comprises a flushing block, a communication pipe is fixedly arranged on the flushing block, the outer wall of the communication pipe is slidably connected with the flotation machine shell, a plurality of flushing holes are arranged on the flushing block, a plurality of L-shaped frames are fixedly arranged on the rear wall of the flotation machine shell, a second servo motor is installed on the L-shaped frame, a lead screw is rotatably connected to the L-shaped frame, the other end of the lead screw is rotatably connected with the flotation machine shell, and the output shaft of the second servo motor is coaxially connected with the lead screw.

[0017] Through the technical scheme, the flushing liquid is sprayed through the flushing holes to flush the outer walls of the partition cover, the guide vane and the arc-shaped dispersion block.

[0018] Preferably, a support block is threadedly connected to the lead screw, the bottom surface of the support block is fixedly connected with the outer wall of the communication pipe, a storage cavity is arranged on the flotation machine shell, the flushing block is gap-fitted with the storage cavity, and the flushing block is gap-fitted with the adjacent two protection blocks.

[0019] Preferably, a cover plate is rotatably connected inside the storage cavity, a rotating rod is fixedly arranged on the cover plate, the two ends of the rotating rod are rotatably connected with the flotation machine shell, a dial plate is fixedly arranged on the upper end of the rotating rod, the outer wall of the dial plate is rotatably connected with the flotation machine shell, a T-shaped groove is arranged on the dial plate, a T-shaped block is slidably connected inside the T-shaped groove, a rotating seat is fixedly arranged on the T-shaped block, an electric cylinder is installed on the outer wall of the flotation machine shell, the other end of the push rod is rotatably connected with the rotating seat.

[0020] Through the technical scheme, the dial plate drives the rotating rod and the cover plate to rotate, and the storage cavity is closed, thereby reducing the entry of the ore pulp into the storage cavity.

[0021] Preferably, the middle part of the fixed block is rotationally connected with a bidirectional screw rod, the outer peripheral wall of the bidirectional screw rod is rotationally connected with the sliding block, two sliding blocks are respectively threadedly connected with the bidirectional screw rod through the threaded holes, one sliding block is provided with a third servo motor outside, the output shaft of the third servo motor is coaxially connected with the bidirectional screw rod, one end of the gantry is slidably connected with the outer peripheral wall of the bidirectional screw rod through the through slot, the two sides of the fixed block are respectively fixedly provided with arc-shaped blocks, the arc-shaped blocks are provided with telescopic protective covers, the telescopic protective covers are fixedly connected with the sliding blocks, the two ends of the scraper are respectively fixedly connected with the fixed block through telescopic rods, the upper end of the gantry is slidably connected with a C-shaped block, the two ends of the C-shaped block are respectively fixedly connected with the sliding blocks, the top surface of the C-shaped block is provided with a pneumatic cylinder, and the bottom surface of the piston rod of the pneumatic cylinder is fixedly connected with the top surface of the gantry.

[0022] Through the above technical scheme, the transverse coverage of the fixed block and the scraper is further adjusted, the foam layer range of different flotation chambers is adapted, and the occurrence of edge foam missing scraping is reduced.

[0023] The beneficial effects of the present application are as follows: the defoaming assembly is fixed to the inner wall of the flotation machine shell through the gantry, the two sliding blocks can slide along the gantry to adjust the overall position, the fixed block between the sliding blocks is provided with a through slot, the sliding block can slide in the through slot, the scraper on the two sides of the fixed block is connected through the connecting block, the hinge seat and the connecting rod, and the other end of the connecting rod is rotationally connected with the hinge seat on the sliding block; when the sliding block slides along the through slot, the connecting block and the scraper are driven to move synchronously through the transmission action of the connecting rod, the depth of the scraper is adjusted, different thicknesses of the foam layer are adapted, the accurate scraping of the foam layer in the flotation process is completed, the depth of the scraper is conveniently and flexibly adjusted, the change of the foam layer under different coal qualities and working conditions is adapted, different thicknesses of the foam layer are scraped in a targeted manner, the full collection of target clean coal particles is ensured, the loss of clean coal caused by the residual bottom foam is reduced, the lower ore pulp is scraped, the mixing of tailings ash into clean coal is prevented, the quality is not up to standard, the separation precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic view of the present application;

[0025] Figure 2 It is a flotation chamber structure schematic view of the present application;

[0026] Figure 3 It is a compartment cover structure bottom view of the present application;

[0027] Figure 4 It is a guide impeller structure schematic view of the present application;

[0028] Figure 5 It is a sleeve structure bottom view of the present application;

[0029] Figure 6Structure schematic diagram of stirring assembly of the present application;

[0030] Figure 7 Enlarged structure schematic diagram of A of the present application;

[0031] Figure 8 Structure schematic diagram of dial of the present application;

[0032] Figure 9 Enlarged structure schematic diagram of B of the present application;

[0033] Figure 10 Structure schematic diagram of flushing block of the present application;

[0034] Figure 11 Structure schematic diagram of gate of the present application;

[0035] Figure 12 Structure schematic diagram of bubble removing assembly of the present application;

[0036] Figure 13 Structure schematic diagram of scraper of the present application;

[0037] Figure 14 Structure schematic diagram of connecting rod of the present application.

[0038] In the figure: 100, floatation machine shell; 101, bearing seat; 102, rotating shaft; 103, floatation column; 104, floatation chamber; 105, first servo motor; 106, traction wheel; 107, belt; 108, compartment cover; 109, protection block; 110, guide vane; 111, sleeve; 112, air inlet pipe; 113, shunt; 114, air distributor; 115, arc-shaped dispersion block; 116, air inlet groove;

[0039] 200, stirring assembly; 201, gear ring; 202, gear; 203, protection box; 204, worm; 205, worm wheel; 206, stirring rod;

[0040] 300, flushing assembly; 301, flushing block; 302, communication pipe; 303, flushing hole; 304, L-shaped frame; 305, second servo motor; 306, screw rod; 307, support block; 308, storage cavity; 309, cover plate; 310, rotating rod; 311, dial; 312, T-shaped groove; 313, T-shaped block; 314, rotating seat; 315, electric cylinder; 316, push rod;

[0041] 400, bubble removing assembly; 401, gantry; 402, sliding block; 403, fixed block; 404, through slot; 405, push block; 406, bidirectional screw; 407, scraper; 408, connecting block; 409, hinge seat; 410, connecting rod; 411, third servo motor; 412, arc-shaped block; 413, telescopic protective cover; 414, telescopic rod; 415, C-shaped block; 416, air cylinder; 417, through groove;

[0042] 500, gate. DETAILED DESCRIPTION

[0043] In order to make the above objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings.

[0044] As Figures 1-14 shown, the present embodiment provides a coal washing device, which comprises a flotation machine shell 100, a plurality of bearing seats 101 are installed on the upper end of the flotation machine shell 100, a rotating shaft 102 is rotatably connected inside the bearing seat 101, a flotation column 103 is sleeved on the outer wall of the rotating shaft 102, a stirring assembly 200 is installed in the middle of the flotation column 103, and a plurality of flushing assemblies 300 are arranged on the outer wall of the flotation machine shell 100.

[0045] One end of the flotation column 103 is provided with a bubble removing assembly 400, the bubble removing assembly 400 comprises a gantry 401, the bottom surface of the gantry 401 is fixedly connected with the inner wall of the flotation machine shell 100, two sliding blocks 402 are slidably connected on the gantry 401, a fixed block 403 is arranged between the two sliding blocks 402, two through slots 404 are formed in the fixed block 403, a push block 405 is slidably connected inside the through slot 404, two scrapers 407 are arranged on the two sides of the fixed block 403, two connecting blocks 408 are fixedly arranged on the scrapers 407, hinge seats 409 are fixedly arranged on the push block 405 and the connecting blocks 408, and a connecting rod 410 is rotatably connected between the two hinge seats 409.

[0046] A plurality of flotation chambers 104 are arranged inside the flotation machine shell 100, a gate 500 is arranged between two adjacent flotation chambers 104, the rotating shaft 102, the flotation column 103 and the stirring assembly 200 are respectively located inside the flotation chamber 104, a plurality of first servo motors 105 are installed on the top surface of the flotation machine shell 100, a traction wheel 106 is sleeved on the output shaft of the first servo motor 105 and the upper end of the rotating shaft 102, respectively, and the traction wheels 106 are frictionally driven by a belt 107 between the wheel grooves of the two traction wheels 106; the rotating shaft 102 in the flotation chamber 104 is driven to rotate by the frictional transmission of the output shaft of the first servo motor 105 through the traction wheel 106 and the belt 107, thereby providing power for subsequent stirring, air inlet and other links.

[0047] The lower end of the flotation column 103 is fixedly provided with a compartment cover 108, a plurality of protective blocks 109 are fixedly arranged in an annular array structure on the compartment cover 108, the inner wall of the protective block 109 is sawtooth-shaped, a guide impeller 110 is installed on the bottom surface of the rotating shaft 102, the guide impeller 110 is located inside the compartment cover 108, the lower end of the rotating shaft 102 is hollow, a sleeve pipe 111 is rotatably connected to the outer wall of the rotating shaft 102, an air inlet pipe 112 is fixedly arranged on the flotation column 103, the air inlet pipe 112 is in communication with the inside of the lower end of the flotation column 103, a shunt 113 is formed on the air inlet pipe 112, the air inlet pipe 112 is in communication with the sleeve pipe 111, a plurality of air inlet grooves 116 are formed on the lower end of the rotating shaft 102, the sleeve pipe 111 is in communication with the air inlet grooves 116, an air distributor 114 is in communication with the bottom surface of the rotating shaft 102, arc-shaped dispersion blocks 115 are fixedly arranged on the outer peripheral wall of the air distributor 114, and the top surface of the arc-shaped dispersion block 115 is fixedly connected to the bottom surface of the guide impeller 110; the rotating shaft 102 drives the guide impeller 110 at the bottom to rotate, the air distributor 114 rotates synchronously, the arc-shaped dispersion blocks 115 on the outer peripheral wall of the air distributor 114 rotate with the guide impeller 110, and the air discharged from the air distributor 114 is broken into fine bubbles.

[0048] The stirring assembly 200 comprises two gear rings 201, the gear rings 201 are sleeved on the outer peripheral wall of the rotating shaft 102, a plurality of gears 202 are meshingly connected to the gear rings 201, a protective box 203 is arranged between the two gears 202, a worm 204 is arranged inside the protective box 203, the outer peripheral walls of the two ends of the worm 204 are rotatably connected to the protective box 203, the two ends of the worm 204 are fixedly connected to the gears 202, a worm wheel 205 is meshingly connected to the worm 204, a stirring rod 206 is sleeved on the worm wheel 205, and the outer peripheral wall of the stirring rod 206 is rotatably connected to the protective box 203 and the flotation column 103; the gear rings 201 are meshed with the gears 202, thereby driving the gears 202 and the coaxially fixed worm 204 to rotate, the worm 204 is meshed with the worm wheel 205, and finally the stirring rod 206 sleeved on the worm wheel 205 is driven to rotate, so that the ore pulp and the flotation reagent are fully mixed, thereby creating conditions for the subsequent fine coal particles to adhere to the bubbles.

[0049] The flushing assembly 300 comprises a flushing block 301, a communication pipe 302 is fixedly arranged on the flushing block 301, the outer peripheral wall of the communication pipe 302 is slidably connected to the flotation machine shell 100, a plurality of flushing holes 303 are formed on the flushing block 301, a plurality of L-shaped frames 304 are fixedly arranged on the rear wall of the flotation machine shell 100, a second servo motor 305 is installed on the L-shaped frame 304, a lead screw 306 is rotatably connected to the L-shaped frame 304, the other end of the lead screw 306 is rotatably connected to the flotation machine shell 100, and the output shaft of the second servo motor 305 is coaxially connected to the lead screw 306; the flushing liquid is sprayed through the flushing holes 303 to flush the outer wall of the compartment cover 108, the guide impeller 110 and the arc-shaped dispersion blocks.

[0050] The support block 307 is threadedly connected on the screw rod 306, the bottom surface of the support block 307 is fixedly connected with the outer wall of the communication pipe 302, the storage cavity 308 is arranged on the flotation machine shell 100, the flushing block 301 is in clearance fit with the storage cavity 308, the flushing block 301 is in clearance fit between two adjacent protection blocks 109 respectively, the cover plate 309 is rotatably connected in the storage cavity 308, the rotating rod 310 is fixedly arranged on the cover plate 309, the two ends of the rotating rod 310 are rotatably connected with the flotation machine shell 100, the dial 311 is fixedly arranged on the upper end of the rotating rod 310, the outer wall of the dial 311 is rotatably connected with the flotation machine shell 100, the T-shaped groove 312 is arranged on the dial 311, the T-shaped block 313 is slidably connected in the T-shaped groove 312, the rotating seat 314 is fixedly arranged on the T-shaped block 313, the electric cylinder 315 is arranged on the outer wall of the flotation machine shell 100, the push rod 316 is coaxially connected on the piston rod of the electric cylinder 315, the other end of the push rod 316 is rotatably connected with the rotating seat 314; the dial 311 drives the rotating rod 310 and the cover plate 309 to rotate, the storage cavity 308 is closed, and the pulp entering the storage cavity 308 is reduced.

[0051] The bidirectional screw rod 406 is rotatably connected in the middle of the fixed block 403, the outer peripheral wall of the bidirectional screw rod 406 is rotatably connected with the sliding block 402, the two push blocks 405 are threadedly connected with the bidirectional screw rod 406 through the threaded holes respectively, the outer side of one sliding block 402 is provided with the third servo motor 411, the output shaft of the third servo motor 411 is coaxially connected with the bidirectional screw rod 406, one end of the gantry 401 is slidably connected with the outer peripheral wall of the bidirectional screw rod 406 through the penetrating groove 417, the two sides of the fixed block 403 are fixedly provided with the arc-shaped blocks 412 respectively, the telescopic protective cover 413 is arranged on the arc-shaped block 412, the telescopic protective cover 413 is fixedly connected with the push block 405, the two ends of the scraper 407 are fixedly connected with the fixed block 403 through the telescopic rods 414 respectively, the C-shaped block 415 is slidably connected with the outer wall of the upper end of the gantry 401, the two end bottom surfaces of the C-shaped block 415 are fixedly connected with the sliding blocks 402 respectively, the air cylinder 416 is arranged on the top surface of the C-shaped block 415, the bottom surface of the piston rod of the air cylinder 416 is fixedly connected with the top surface of the gantry 401; the lateral coverage of the fixed block 403 and the scraper 407 is further adjusted, the foam layer range of different flotation chambers 104 is adapted, and the occurrence of the edge foam missing scraping is reduced.

[0052] The bubble removing assembly 400 is fixed to the inner wall of the flotation machine shell 100 through the gantry 401, two sliding blocks 402 can slide along the gantry 401 to adjust the overall position, a through slot 404 is formed on the fixed block 403 between the sliding blocks 402, a push block 405 can slide in the through slot 404, the scraper 407 on both sides of the fixed block 403 is connected with the connecting block 408, the hinge base 409 and the connecting rod 410, the other end of the connecting rod 410 is rotationally connected with the hinge base 409 on the push block 405; when the push block 405 slides along the through slot 404, the connecting block 408 and the scraper 407 are driven to move synchronously through the transmission action of the connecting rod 410, the depth of the scraper 407 is adjusted, so that the foam layer of different thicknesses is adapted, and the accurate scraping of the foam layer in the flotation process is completed; the depth of the scraper 407 is conveniently and flexibly adjusted, the change of the foam layer under different coal qualities and working conditions is adapted, the foam layer of different thicknesses is scraped in pertinence, the target clean coal particles are fully collected, the loss of clean coal caused by the residual bottom foam is reduced, the lower ore pulp is scraped, the tailings ash mixed into the clean coal to cause the quality not to reach the standard is prevented, and the separation precision is improved.

[0053] Before the coal washing and selection, the coal ore pulp is synchronously conveyed to the flotation columns 103 in the flotation chambers 104 through the main feeding and auxiliary feeding, so that the different processing capacity requirements are met; the on-off of the adjacent flotation chambers 104 is controlled through the gate 500, the ore pulp after flotation is conveyed to the flotation column 103 in the next flotation chamber 104 through the discharge pipe installed on the gate 500, the multi-stage continuous separation is realized, the material flow of each flotation chamber 104 is conveniently controlled through the gate 500, and the continuity of the separation is ensured; the output shaft of the first servo motor 105 drives the rotation shaft 102 in the flotation chamber 104 to rotate through the friction transmission of the traction wheel 106 and the belt 107, and provides power for the subsequent stirring, air feeding and other links;

[0054] When the first servo motor 105 drives the rotation shaft 102 to rotate, the gear ring 201 sleeved on the outer peripheral wall of the rotation shaft 102 synchronously rotates, the gear ring 201 meshes with the gear 202, drives the gear 202 and the coaxially fixed worm 204 to rotate, the worm 204 meshes with the worm gear 205, and finally drives the stirring rod 206 sleeved on the worm gear 205 to rotate, so that the ore pulp and the flotation reagent are fully mixed, conditions are created for the subsequent clean coal particles to adhere to the bubbles, and the protection box 203 reduces the impurities of the ore pulp into the worm and worm gear transmission structure, and ensures the transmission stability;

[0055] The external air is introduced into the air inlet pipe 112 by an external air pump, part of the air directly enters the lower end of the flotation column 103 through the shunt 113 on the air inlet pipe 112, and the other part is transported to the air inlet groove 116 at the lower end of the rotating shaft 102 through the sleeve pipe 111, and then enters the inside of the rotating shaft 102, and finally flows to the air distributor 114. The rotating shaft 102 drives the guide impeller 110 at the bottom to rotate, and the air distributor 114 rotates synchronously. The arc-shaped dispersion blocks 115 on the outer peripheral wall of the air distributor 114 rotate with the guide impeller 110, and the air discharged from the air distributor 114 is broken into fine bubbles. The partition cover 108 and the protective blocks 109 on the inner wall reduce the impact of the ore slurry on the guide impeller, and further disperse the bubbles, thereby increasing the contact area between the clean coal particles and the bubbles.

[0056] When flushing, the water pipe containing cleaning liquid outside is connected with the communication pipe 302 through the water pump, the second servo motor 305 drives the screw rod 306 to rotate, the support block 307 threadedly connected on the screw rod 306 moves along the screw rod, drives the communication pipe 302 and the flushing block 301 fixed therewith to move synchronously, the flushing block 301 can slide along the storage cavity 308 and is matched with the adjacent protective block 109 in a gap, and the flushing liquid is sprayed through the flushing hole 303 to flush the partition cover 108, the guide impeller 110 and the outer wall of the arc-shaped dispersion block.

[0057] When flushing is not needed, the electric cylinder 315 pushes the push rod 316, drives the rotating seat 314 and the T-shaped block 313 to move, rotates the dial plate 311, drives the rotating rod 310 and the cover plate 309 to rotate, closes the storage cavity 308, and reduces the entry of the ore slurry into the storage cavity 308.

[0058] When the bubbles are removed, the third servo motor 411 drives the bidirectional screw rod 406 to rotate, the two push blocks 405 slide relatively or towards each other along the through slot 404, the scraper 407 is driven to rotate through the connecting rod 410, the depth of scraping of the scraper is adjusted by cooperating with the telescopic rod 414, the piston rod of the cylinder 416 is extended or retracted, drives the C-shaped block 415 and the sliding block 402 fixed therewith to slide along the gantry 401, further adjusts the transverse coverage of the fixed block 403 and the scraper 407, adapts to the range of the foam layer of different flotation chambers 104, reduces the occurrence of the edge foam missing scraping, the telescopic protective cover 413 reduces the entry of the ore slurry into the transmission components such as the bidirectional screw rod 406, prolongs the service life, facilitates the real-time adaptation to the change of the foam layer, improves the quality and efficiency of the coal washing, and facilitates the continuous production and use.

[0059] Working principle: in the process of coal washing, the bubble removing assembly 400 is fixed to the inner wall of the flotation machine shell 100 through the gantry 401, two sliding blocks 402 can slide along the gantry 401 to adjust the overall position, a through slot 404 is formed on the fixed block 403 between the sliding blocks 402, a push block 405 can slide in the through slot 404, the scraper 407 on both sides of the fixed block 403 is connected with the connecting block 408, the hinge base 409 and the connecting rod 410, the other end of the connecting rod 410 is rotationally connected with the hinge base 409 on the push block 405; when the push block 405 slides along the through slot 404, the connecting block 408 and the scraper 407 are driven to move synchronously through the transmission action of the connecting rod 410, the depth of the scraper 407 is adjusted, so that the foam layer of different thicknesses is adapted, and the accurate scraping of the foam layer in the flotation process is completed; the depth of the scraper 407 is conveniently and flexibly adjusted, the change of the foam layer under different coal quality and working conditions is adapted, the foam layer of different thicknesses is scraped in pertinence, the target clean coal particles are fully collected, the loss of clean coal caused by the residual bottom foam is reduced, the lower ore pulp is scraped, the tailings ash is prevented from mixing into the clean coal to cause the quality not to meet the standard, and the separation precision is improved.

[0060] Before coal washing, the coal ore pulp is synchronously conveyed to the flotation column 103 in each flotation chamber 104 through the main feed and auxiliary feed to meet the different processing capacity requirements; the on-off of the adjacent flotation chambers 104 is controlled through the gate 500, the ore pulp after flotation is conveyed to the flotation column 103 in the next flotation chamber 104 through the discharge pipe installed on the gate 500, the multi-stage continuous separation is realized, the gate 500 conveniently controls the material flow of each flotation chamber 104, and the continuity of separation is guaranteed; the output shaft of the first servo motor 105 drives the rotating shaft 102 in the flotation chamber 104 to rotate through the friction transmission of the traction wheel 106 and the belt 107, and provides power for the subsequent stirring, air inlet and other links;

[0061] When the first servo motor 105 drives the rotating shaft 102 to rotate, the gear ring 201 sleeved on the outer peripheral wall synchronously rotates, the gear ring 201 meshes with the gear 202, drives the gear 202 and the coaxially fixed worm 204 to rotate, the worm 204 meshes with the worm gear 205, and finally drives the stirring rod 206 sleeved on the worm gear 205 to rotate, so that the ore pulp and the flotation reagent are fully mixed, conditions are created for the subsequent clean coal particles to adhere to the bubbles, and the protection box 203 reduces the impurities of the ore pulp entering the worm and worm gear transmission structure, and guarantees the transmission stability;

[0062] The external air is introduced into the air inlet pipe 112 by an external air pump, part of the air is directly introduced into the lower end of the flotation column 103 through the shunt 113 on the air inlet pipe 112, and the other part is transported to the air inlet groove 116 at the lower end of the rotating shaft 102 through the sleeve pipe 111, and then enters the inside of the rotating shaft 102, and finally flows to the air distributor 114. The rotating shaft 102 drives the guide impeller 110 at the bottom to rotate, and the air distributor 114 rotates synchronously. The arc-shaped dispersion blocks 115 on the outer peripheral wall of the air distributor 114 rotate with the guide impeller 110, and the air discharged from the air distributor 114 is broken into fine bubbles. The compartment cover 108 and the protective blocks 109 in the form of sawteeth on the inner wall reduce the impact of the ore slurry on the guide impeller, and further disperse the bubbles, thereby increasing the contact area between the clean coal particles and the bubbles.

[0063] When flushing, the water pipe containing the cleaning liquid outside is connected to the communication pipe 302 through the water pump, the second servo motor 305 drives the screw rod 306 to rotate, the support block 307 threadedly connected to the screw rod 306 moves along the screw rod, drives the communication pipe 302 and the flushing block 301 fixed thereto to move synchronously, the flushing block 301 can slide along the storage cavity 308 and is matched with the adjacent protective block 109 in a gap, and the flushing liquid is sprayed through the flushing hole 303 to flush the compartment cover 108, the guide impeller 110 and the outer wall of the arc-shaped dispersion block.

[0064] When flushing is not needed, the electric cylinder 315 pushes the push rod 316, drives the rotating seat 314 and the T-shaped block 313 to move, rotates the dial plate 311, drives the rotating rod 310 and the cover plate 309 to rotate, and closes the storage cavity 308, thereby reducing the entry of the ore slurry into the storage cavity 308.

[0065] When the bubbles are removed, the third servo motor 411 drives the bidirectional screw rod 406 to rotate, the two push blocks 405 slide along the through groove 404 in opposite directions or the same direction, the scraper 407 is driven to rotate through the connecting rod 410, the extension and retraction of the piston rod of the air cylinder 416 drives the C-shaped block 415 and the sliding block 402 fixed thereto to slide along the gantry 401, the transverse coverage of the fixed block 403 and the scraper 407 is further adjusted, the range of the foam layer of different flotation chambers 104 is adapted, the occurrence of the missed scraping of the edge foam is reduced, the extension and retraction protective cover 413 reduces the entry of the ore slurry into the transmission components such as the bidirectional screw rod 406, prolongs the service life, facilitates the real-time adaptation to the change of the foam layer, improves the quality and the selection efficiency of the coal washing, and facilitates the continuous production and use.

[0066] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A coal washing and beneficiation device, characterized in that, include: A flotation machine housing (100) is provided with a plurality of bearing seats (101) installed at the upper end of the flotation machine housing (100). A rotating shaft (102) is rotatably connected inside the bearing seat (101). A flotation column (103) is sleeved on the outer wall of the rotating shaft (102). An agitator assembly (200) is installed in the middle of the flotation column (103). A plurality of flushing assemblies (300) are provided on the outer wall of the flotation machine housing (100). One end of the flotation column (103) is provided with a defoaming assembly (400). The defoaming assembly (400) includes a gantry frame (401). The bottom surface of the gantry frame (401) is fixedly connected to the inner wall of the flotation machine housing (100). Two sliders (402) are slidably connected on the gantry frame (401). A fixing block (403) is provided between the two sliders (402). Two through slots (404) are opened on the fixing block (403). A push block (405) is slidably connected inside the through slots (404). Two scrapers (407) are provided on both sides of the fixing block (403). Two connecting blocks (408) are fixed on the scrapers (407). Hinge seats (409) are fixed on the push blocks (405) and the connecting blocks (408). A connecting rod (410) is rotatably connected between the two hinge seats (409). A bidirectional lead screw (406) is rotatably connected to the middle of the fixed block (403). The outer peripheral wall of the bidirectional lead screw (406) is rotatably connected to the slider (402). Two push blocks (405) are threadedly connected to the bidirectional lead screw (406) through threaded holes. A third servo motor (411) is installed on the outside of one of the sliders (402). The output shaft of the third servo motor (411) is coaxially connected to the bidirectional lead screw (406). One end of the gantry (401) is slidably connected to the outer peripheral wall of the bidirectional lead screw (406) through a through slot (417). Two fixed blocks are respectively fixed on both sides of the fixed block (403). An arc-shaped block (412) is provided with a telescopic protective cover (413), which is fixedly connected to a push block (405). The two ends of the scraper (407) are fixedly connected to a fixed block (403) via telescopic rods (414). A C-shaped block (415) is slidably connected to the outer wall of the upper end of the gantry frame (401). The bottom surfaces of the two ends of the C-shaped block (415) are fixedly connected to a slider (402). A cylinder (416) is installed on the top surface of the C-shaped block (415), and the bottom surface of the piston rod of the cylinder (416) is fixedly connected to the top surface of the gantry frame (401). The lower end of the flotation column (103) is fixedly provided with a partition cover (108), and a plurality of protective blocks (109) are fixedly provided on the partition cover (108) in a ring array structure. The inner wall of the protective blocks (109) is serrated. The bottom surface of the rotating shaft (102) is connected to an air distributor (114), and an arc-shaped dispersion block (115) is fixedly provided on the outer peripheral wall of the air distributor (114). The top surface of the arc-shaped dispersion block (115) is fixedly connected to the bottom surface of the guide impeller (110). The flushing assembly (300) includes a flushing block (301), a connecting pipe (302) is fixedly provided on the flushing block (301), the outer peripheral wall of the connecting pipe (302) is slidably connected to the flotation machine housing (100), a plurality of flushing holes (303) are provided on the flushing block (301), a plurality of L-shaped frames (304) are fixedly provided on the rear wall of the flotation machine housing (100), a second servo motor (305) is installed on the L-shaped frame (304), a lead screw (306) is rotatably connected to the L-shaped frame (304), the other end of the lead screw (306) is rotatably connected to the flotation machine housing (100), and the output shaft of the second servo motor (305) is coaxially connected to the lead screw (306). A support block (307) is threaded onto the lead screw (306). The bottom surface of the support block (307) is fixedly connected to the outer wall of the connecting pipe (302). A storage cavity (308) is provided on the flotation machine housing (100). The flushing block (301) is clearance-fitted with the storage cavity (308). The flushing block (301) is clearance-fitted with two adjacent protective blocks (109). The storage cavity (308) is rotatably connected to a cover plate (309). A rotating rod (310) is fixed on the cover plate (309). Both ends of the rotating rod (310) are rotatably connected to the flotation machine housing (100). A dial (311) is fixed on the upper end of the rotating rod (310). The outer wall of the dial (311) is rotatably connected to the flotation machine housing (100). A T-shaped groove (312) is opened on the dial (311). A T-shaped block (313) is slidably connected inside the T-shaped groove (312). A rotating seat (314) is fixed on the T-shaped block (313). An electric cylinder (315) is installed on the outer wall of the flotation machine housing (100). A push rod (316) is coaxially connected to the piston rod of the electric cylinder (315). The other end of the push rod (316) is rotatably connected to the rotating seat (314).

2. The coal washing and beneficiation device as described in claim 1, characterized in that: The flotation machine housing (100) is provided with multiple flotation chambers (104) inside, and a gate (500) is provided between two adjacent flotation chambers (104). The rotating shaft (102), flotation column (103) and stirring assembly (200) are located inside the flotation chambers (104) respectively. Multiple first servo motors (105) are installed on the top surface of the flotation machine housing (100). The output shaft of the first servo motor (105) and the upper end of the rotating shaft (102) are respectively fitted with traction wheels (106). The grooves of the two traction wheels (106) are connected by friction transmission through belts (107).

3. The coal washing and beneficiation device as described in claim 2, characterized in that: A guide impeller (110) is mounted on the bottom surface of the rotating shaft (102), and the guide impeller (110) is located inside the compartment cover (108).

4. The coal washing and beneficiation device as described in claim 3, characterized in that: The lower end of the rotating shaft (102) is hollow. A sleeve (111) is rotatably connected to the outer wall of the rotating shaft (102). An air inlet pipe (112) is fixed on the flotation column (103). The air inlet pipe (112) is connected to the lower end of the flotation column (103). A diversion port (113) is opened on the air inlet pipe (112). The air inlet pipe (112) is connected to the sleeve (111). A plurality of air inlet grooves (116) are opened at the lower end of the rotating shaft (102). The sleeve (111) is connected to the air inlet grooves (116).

5. The coal washing and beneficiation device as described in claim 1, characterized in that: The stirring assembly (200) includes two gear rings (201), which are sleeved on the outer peripheral wall of the rotating shaft (102). Multiple gears (202) are meshed on the gear rings (201). A protective box (203) is provided between the two gears (202). A worm gear (204) is provided inside the protective box (203). The outer peripheral walls at both ends of the worm gear (204) are rotatably connected to the protective box (203).

6. The coal washing and beneficiation apparatus as described in claim 5, characterized in that: The two ends of the worm (204) are fixedly connected to the gear (202) respectively. A worm wheel (205) is meshed on the worm (204). A stirring rod (206) is sleeved on the worm wheel (205). The outer peripheral wall of the stirring rod (206) is rotatably connected to the protective box (203) and the flotation column (103) respectively.

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