A coal slurry flotation system

Abstract

The present application relates to the field of coal mine, specifically to a slime flotation system, comprising a flotation machine and a slurry preparator, samplers are arranged at different depths in the slurry preparator, the samplers are used for sampling the slurry to analyze the concentration of different ions in the slurry, ion compensators are communicated with the slurry preparator to add different reagents to adjust the ion concentration in the slurry, the slurry outlet of the slurry preparator is communicated with the feed pipe of the flotation machine; the ion compensator comprises reagent tanks for containing different reagents, each reagent tank is communicated with a compensation pipe through a reagent branch pipe, first valves and second valves are arranged on the reagent branch pipes and the compensation pipe respectively to control the opening and closing of the pipelines, and the reagents are injected into the slurry preparator after passing through the compensation pipe, a micro-injection pump and an ejector in sequence. The present application can accurately adjust the ion concentration in the slime water during flotation, and maximize the yield of the flotation clean coal.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coal mines, and particularly relates to a slime flotation system. BACKGROUND

[0002] Coal washing is a source technology for clean and efficient utilization of coal, and flotation is one of the main processes. The basic principle of flotation process is to realize the separation of useful minerals by using the difference in hydrophobicity of the surface of the purpose mineral and the gangue mineral. As the only carrier of hydrophobic purpose minerals, bubbles adhere to hydrophobic particles to form stable mineralized bubbles, which rise to the froth layer under the action of buoyancy, realizing the purpose of hydrophobic particles being enriched. The timely rupture of bubbles enriched in the froth layer is conducive to the recovery of particles.

[0003] Due to the presence of different metal ions in slime water, different ions have different effects on the flotation process, and different ions can increase or decrease the yield of flotation clean coal. Only when the ion concentration is adjusted to the optimal value, the yield of flotation clean coal can be maximized. However, there is no effective method to accurately adjust the ion concentration in slime water during flotation at present, and therefore it is urgent to solve the problem. SUMMARY

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present application provides a slime flotation system. The present application can accurately adjust the ion concentration in slime water during flotation, and maximize the yield of flotation clean coal.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A slime flotation system comprises a flotation machine and a slurry preparator. The slurry preparator is provided with a sampler at different depths. The sampler is used for sampling the slurry to analyze the concentration of different ions in the slurry. An ion compensator is in communication with the slurry preparator to add different reagents to adjust the ion concentration in the slurry. The slurry outlet of the slurry preparator is in communication with the feed pipe of the flotation machine.

[0007] The ion compensator comprises a reagent tank for containing different reagents. Each reagent tank is in communication with a compensating pipe through a reagent branch pipe. First and second valves are arranged on the reagent branch pipe and the compensating pipe respectively to control the opening and closing of the pipeline. The reagent is injected into the slurry preparator after passing through the compensating pipe, a micro-injection pump and an ejector in sequence.

[0008] As a further scheme of the present application: a sampling inlet channel is formed on the sampler and communicates with the inner cavity of the sampler; a sampling tube is arranged in the inner cavity of the sampler and coaxially inserted into the sampling inlet channel; one end of the sampling tube in the inner cavity of the sampler is closed; a sampling hole is formed on the sampling tube for the flow of the ore pulp; the sampling tube is driven by a power source to slide along the length direction of the sampling inlet channel, so that the cavity wall of the sampling inlet channel blocks the sampling hole or the sampling hole communicates with the inner cavity of the sampler.

[0009] As a further scheme of the present application: the inner cavity of the sampler is arranged with a first piston and a second piston; the inner cavity of the sampler is sequentially divided into a sampling cavity, a buffer cavity and a sealing cavity along the direction away from the sampling inlet channel by the first piston and the second piston; the first piston and the second piston are connected and fixed by a connecting rod; the power source is arranged in the sealing cavity to drive the second piston to slide with the inner cavity of the sampler; the sampling tube is fixed on the first piston and extends from the sampling cavity into the sampling inlet channel; a sampling outlet is formed on the sampler for the discharge of the ore pulp; when the second piston is driven to move by the power source, the sampling outlet communicates with the buffer cavity and the sampling cavity alternatively.

[0010] As a further scheme of the present application: the sampling inlet channel is formed on the bottom of the sampler along the vertical direction; the sampling outlet is formed on the side wall of the sampler and communicates with a sampling outlet tube; an electromagnetic valve is arranged in the sampling outlet tube to control the opening and closing of the pipeline.

[0011] As a further scheme of the present application: a spring is arranged between the second piston and the inner cavity of the sampler along the length direction of the sampling inlet channel; the cavity wall of the sampler and / or the second piston is arranged with a pressure sensor at the contact surface of the spring to control the opening and closing of the electromagnetic valve.

[0012] As a further scheme of the present application: the power source is an electric push rod arranged in the sealing cavity along the length direction of the sampling inlet channel; the two ends of the electric push rod are respectively connected and fixed with the cavity wall of the sampler and the first piston; the shell of the sampler is in the shape of an ellipsoid with smooth surface.

[0013] As a further scheme of the present application: the flotation machine comprises a feed pipe and a cyclone cone; the discharge port of the feed pipe communicates with the inside of the cyclone cone along the tangent direction of the cyclone cone; the interface between the discharge port and the cyclone cone is sealed by a sealing ring; a suspension partition plate is arranged in the feed pipe; the surface of the suspension partition plate is uniformly arranged with honeycomb-shaped flow straightening plates, so that the surface of the suspension partition plate forms a plurality of groups of honeycomb cavities for the passage of slime water; each honeycomb cavity has an included angle with the feed direction of the feed pipe.

[0014] As a further scheme of the present application: the cyclone cone bottom is provided with an underflow outlet for fine mud discharge, and an overflow pipe is arranged in the cyclone cone in the axial direction, the bottom of the overflow pipe extends to the underflow outlet for fine coal to enter, and the top of the overflow pipe is provided with an overflow outlet extending to the outside of the cyclone cone for fine coal discharge; the spray nozzle is arranged in the upstream end of each suspension baffle in the feed pipe for eliminating foam; the spray nozzle comprises an arc-shaped flow guide pipe matched with the shape of the top wall of the feed pipe, and spray heads are uniformly arranged on the flow guide pipe in the radial direction of the feed pipe, and spray holes are uniformly arranged on each spray head to form a range of spraying.

[0015] As a further scheme of the present application: the suspension baffle is arranged in the feed pipe in the direction of incoming material and inclined to the direction of the discharge outlet of the feed pipe, and a corrugated plate in a wave shape is arranged in each honeycomb cavity; the suspension baffle is arranged in at least two groups and uniformly spaced along the length direction of the feed pipe.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1、The present application obtains the ore pulp sample in the ore pulp preparator through the sampler, and sends it to the analyzer to analyze the ion concentration in different areas of the ore pulp, and obtains the average ion concentration by averaging. According to the calculation, the monovalent cation has less effect on coal slime flotation, while the divalent and trivalent metal ions can increase the yield of flotation clean coal and increase the ash content. According to the measured metal ion concentration, different reagents are added in the reagent tank and accurately injected into the ore pulp preparator through PLC, so as to accurately adjust the ion concentration in the ore pulp and complete the ion compensation work, so as to accurately adjust the ion concentration in the coal slime water and maximize the yield of flotation clean coal.

[0018] 2、The bottom of the sampler is provided with a sampling inlet channel for the sampling pipe to insert, and the control of the vertical sliding of the sampling pipe can control the ore pulp to enter or prevent the ore pulp from entering the sampler. Multiple samplers are arranged at different depths, and the vertical sliding of the sampling pipe can complete the automatic sampling of ore pulp at different depths at a fixed time and a fixed quantity. At the same time, the vertical movement of the sampling pipe can dredge the sampling inlet channel to prevent the sampling inlet channel from being blocked.

[0019] 3、The present application is arranged with two groups of pistons in the inner cavity of the sampler, so as to divide the inner cavity of the sampler into three cavity bodies. The sealed cavity in the three cavity bodies is used to install a driving source to drive the synchronous movement of the two groups of pistons. The movement of the pistons makes the sampling outlet selectively communicate with the buffer cavity and the sampling cavity. When the sampling outlet communicates with the sampling cavity, the sampling process starts. The movement of the pistons changes the volume of the sampling cavity. The upward movement of the pistons forms negative pressure, so as to suck the ore pulp in the sampling pipe. The suction process is due to the pressure difference between the inner cavity of the sampling pipe and the sampling cavity. Under the action of the pressure difference, the ore pulp accelerates through the sampling hole, which can dredge the sampling hole to prevent the sampling hole from being blocked.

[0020] 4、The present application controls the opening and closing of the sampling outlet channel by the electromagnetic valve, and since the pressure sensor is arranged in the sealing cavity and the spring is arranged in the sealing cavity and abuts against the second piston and the pressure sensor at two ends, the elastic force of the spring on the pressure sensor can feed back the position of the piston movement in real time during the movement of the piston, and when the pressure signal received by the pressure sensor exceeds the limit value, a signal is transmitted to the electromagnetic valve to open the electromagnetic valve and start sampling. After the second piston, the first piston and the sampling tube are reset by the electric push rod, the pressure signal received by the pressure sensor is lower than the limit value, a signal is transmitted to the electromagnetic valve to close the electromagnetic valve and stop sampling; after sampling, the electromagnetic valve is not opened, the piston is lowered to end sampling, and the sampling cavity can also store the sample, so that the sampler has the function of storing the sample.

[0021] 5、The present application applies stable pulling force and pushing force to the two groups of pistons by the electric push rod; the shell of the sampler is arranged in a smooth ellipsoidal shape, which can effectively prevent the corrosion of the ore pulp on the sampler and reduce the wear of the sampler shell caused by particle collision; the collected sample can be directly discharged and collected through the sampling outlet pipe.

[0022] 6、The present application arranges a unique honeycomb structure on the suspension baffle, so that a plurality of honeycomb cavities are formed for the coal slurry to pass through, and after the suspension baffle is inclined to a specific angle, the mixing degree of the coal slurry containing a plurality of particle sizes before cyclonic flotation can be greatly improved, so that the ore pulp always remains in a suspended state, and the heterogeneous fine sludge is easily detached from the surface of the concentrate; the arrangement of the wave-shaped corrugated plate can make the fluid pass through it produce turbulence, so as to further mix the coal slurry. After the suspension ore pulp enters the inside of the cyclone cone along the tangent direction of the cyclone cone, the suspension ore pulp is stratified under the action of gravity, and under the action of centrifugal force, the heterogeneous fine sludge in the cyclone cone is thrown to the inner wall of the cyclone cone as high-density material and does spiral motion downward, and finally is discharged from the underflow port, while the concentrate as light-density product is concentrated to the center of the cyclone cone and spirally rises along the overflow pipe under the action of buoyancy, and finally is discharged from the overflow port.

[0023] 7、The arrangement of the guide pipe can perform multi-angle divergent spraying operation on the coal slurry in the feeding pipe, and the flotation concentrate foam is eliminated in real time under the spraying action, so that the defoaming efficiency is high. First, the flotation foam is eliminated, so that the heterogeneous fine sludge carried in the foam triangular area is exposed in the ore pulp and detached from the surface of the coal particles under the action of water spraying, and then the ore pulp containing the heterogeneous fine sludge is deeply classified by using the working principle of the cyclone, so as to realize the deep separation of the heterogeneous fine sludge and the clean coal, effectively solve the problem of "back ash" of the flotation clean coal, improve the quality of the clean coal product, and strengthen the flotation. At the same time, the water used for spraying can be recycled, water resources are saved, the whole system has no moving parts, is easy to install and operate, occupies small area, and is safe and simple to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 Fig. 1 is a structural schematic diagram of the present application.

[0025] Fig. 2 Fig. 2 is a structural schematic diagram of the sampler in the present application.

[0026] Fig. 3 Fig. 3 is a structural schematic diagram of the suspension partition in the present application.

[0027] Fig. 4 Fig. 4 is a structural schematic diagram of the sprayer in the present application.

[0028] Fig. 5 Fig. 5 is a structural schematic diagram of the spray head in the present application.

[0029] Fig. 1 is a structural schematic diagram of the present application.

[0030] 1, suspension partition; 11, rectifier plate; 111, corrugated plate;

[0031] 2, sprayer; 21, flow guide pipe; 22, spray head; 221, spray hole;

[0032] 3, feed pipe; 31, discharge port;

[0033] 4, cyclone cone; 41, underflow port;

[0034] 5, overflow pipe; 51, overflow port;

[0035] 6, ore pulp preparer; 7, sampler;

[0036] 71, sampling inlet channel; 72, sampling outlet pipe; 721, electromagnetic valve;

[0037] 73, first piston; 731, sampling pipe; 7311, sampling hole; 74, second piston;

[0038] 75, sealing cavity; 751, spring; 752, pressure sensor; 753, electric push rod;

[0039] 76, buffer cavity; 761, engaging rod; 77, sampling cavity;

[0040] 8, ion compensator; 81, medicament tank; 811, medicament branch pipe; 812, first valve;

[0041] 82, compensation pipe; 821, second valve; 83, micro-injection pump; 84, ejector. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0043] Please refer to Figs. 1-5 In the embodiments of the present application, a slime flotation system comprises a slurry preparer 6 for storing slime water, and a feed pipe 3 of a flotation machine is communicated with a slurry outlet at the bottom of the slurry preparer 6. Sampling devices 7 are uniformly arranged at different depths in the slurry preparer 6, and samples after sampling by the sampling devices 7 are sent to an analyzer for analyzing ion concentration in the slurry.

[0044] An ion compensation adjustment coefficient is calculated according to the measured metal ion concentration of the slurry and the pH of the slurry. According to the calculation, monovalent cations have less effect on slime flotation, while divalent and trivalent metal ions can increase the yield of clean coal and increase the ash content. In view of the above phenomenon, by detecting the concentration of metal ions in the slurry, ions are added to the slurry through external compensation to achieve the purpose of strengthening the content of beneficial ions in flotation and weakening the content of harmful ions in flotation.

[0045] The ion compensator 8 is provided with a plurality of groups of medicament grooves 81 for respectively containing the above different medicaments. The bottom of each medicament groove 81 is provided with a medicament branch pipe 811 communicated with the medicament groove 81, and the medicament branch pipe 811 is provided with a first valve 812 for controlling the opening and closing of each medicament branch pipe 811.

[0046] Each medicament branch pipe 811 is communicated with a compensation pipe 82 after convergence, and the compensation pipe 82 is provided with a second valve 821 for controlling the opening and closing of the compensation pipe 82. The compensation pipe 82, a micro-injection pump 83 and an ejector 84 are sequentially communicated for injecting medicaments into the slurry preparer 6. The first valve 812 and the second valve 821 are both solenoid valves controlled by PLC output signals, and the injection amount is precisely adjusted by the micro-injection pump 83. The micro-injection pump 83 is also controlled by the PLC output signal, and the PLC determines the ion compensation amount according to the measured ion concentration of the slurry, and sends a signal to control the micro-injection pump 83 and the ejector 84 to inject medicaments into the slurry preparer 6.

[0047] Each medicament groove 81 is provided with a bubbling device, air is added into the groove to realize stirring effect, so as to ensure uniformity of ion solution, and an anti-backflow device can be additionally installed in each pipeline to avoid backflow of medicaments. Different ion solutions such as NaCl, MgCl2, CaCl2, AlCl3, Na(OH), HCl and the like are placed in each medicament groove 81.

[0048] The outer contour of the sampler 7 is smooth ellipsoid, and a cylindrical inner cavity is formed in the sampler 7 along the vertical direction. A sampling inlet channel 71 is formed in the bottom of the sampler 7 and communicates with the inner cavity of the sampler 7. A first piston 73 and a second piston 74 are coaxially arranged in the inner cavity of the sampler 7, and the inner cavity of the sampler 7 is divided into a sealed cavity 75, a buffer cavity 76 and a sampling cavity 77 by the first piston 73 and the second piston 74. The first piston 73 and the second piston 74 are in sliding fit with the inner cavity of the sampler 7 along the length direction.

[0049] The first piston 73 and the second piston 74 are connected and fixed by a connecting rod 761, and the first piston 73, the second piston 74 and the inner cavity of the sampler 7 form the buffer cavity 76. The second piston 74 and the inner cavity of the sampler 7 form the sealed cavity 75. The sampling cavity 77, the buffer cavity 76 and the sealed cavity 75 are arranged in sequence in the direction away from the sampling inlet channel 71.

[0050] A sampling tube 731 is arranged at the bottom of the first piston 73 and inserted into the sampling inlet channel 71. The outer diameter of the sampling tube 731 matches the diameter of the sampling inlet channel 71, and one end of the sampling tube 731 located in the inner cavity of the sampler 7 is in a closed state. A sealing ring is arranged at the middle section of the sampling tube 731 to prevent the ore pulp from flowing through the gap between the sampling tube 731 and the sampling inlet channel 71. Uniform sampling holes 7311 are formed in the lower section of the sampling tube 731, and the bottom of the sampling tube 731 is open to allow the ore pulp to flow in. When the first piston 73 moves in the vertical direction, the section of the sampling holes 7311 of the sampling tube 731 moves into the sampling cavity 77 (at this time, the ore pulp enters the sampling cavity 77 through the bottom opening of the sampling tube 731 and the sampling holes 7311 in sequence), or the section of the sampling holes 7311 of the sampling tube 731 is located in the sampling inlet channel 71 (at this time, the sampling inlet channel 71 blocks the sampling holes 7311 and cannot sample).

[0051] A sampling outlet is formed in the side wall of the sampler 7 and communicates with a sampling outlet tube 72. An electromagnetic valve 721 is installed in the sampling outlet tube 72 to control the opening and closing of the sampling outlet tube 72. The sampling outlet tube 72 is horizontally arranged. The first piston 73 and the second piston 74 move synchronously. When the first piston 73 and the second piston 74 move upward, the volume of the sampling cavity 77 increases, the pressure in the cavity decreases, the volume of the sealed cavity 75 decreases, the sampling tube 731 communicates with the sampling cavity 77 and the sampling outlet through the sampling holes 7311, and the sampling cavity 77 sucks the ore pulp through negative pressure to make it flow into the sampling outlet tube 72. When the first piston 73 and the second piston 74 move downward, the sampling cavity 77 returns to the initial state, and the sampling tube 731 and the sampling inlet channel 71 return to the sealed state.

[0052] The sealed cavity 75 of the sampler 7 is arranged with an electric push rod 753 as a power source, which is arranged along the length direction of the sampling inlet channel 71, one end of the electric push rod 753 is fixed on the inner wall of the sampler 7, and the other end of the electric push rod 753 is fixed on the second piston 74. The sampler 7 is also arranged with a spring 751 along the length direction of the sampling inlet channel 71, and the inner cavity of the sampler 7 is arranged with a pressure sensor 752, one end of the spring 751 abuts against the second piston 74, and the other end of the spring 751 abuts against the pressure sensor 752. When the pressure signal received by the pressure sensor 752 exceeds a limit value, a signal is transmitted to the electromagnetic valve 721 to open the electromagnetic valve 721 to start sampling. After the electric push rod 753 drives the second piston 74, the first piston 73 and the sampling tube 731 to reset, the pressure signal received by the pressure sensor 752 is lower than the limit value, a signal is transmitted to the electromagnetic valve 721 to close the electromagnetic valve 721 to stop sampling.

[0053] The flotation machine comprises a cyclone cone 4 arranged in a vertical direction, the top of the cyclone cone 4 is connected with a horizontally arranged feed pipe 3, the feed pipe 3 is a straight pipe communicated with the outlet of the slurry preparer 6, and the discharge outlet 31 is arranged tangentially to the inner cavity of the cyclone cone 4.

[0054] The bottom of the cyclone cone 4 is a underflow outlet 41 for discharging fine mud, and the cyclone cone 4 is arranged with an overflow pipe 5 along the axial direction thereof, the bottom of the overflow pipe 5 extends to the underflow outlet 41 for the fine coal to enter, and the top of the overflow pipe 4 extends to the outside of the cyclone cone 4 and is bent to form an overflow outlet 51 arranged in a horizontal direction for discharging the fine coal.

[0055] After the suspension slurry enters the inside of the cyclone cone 4 in a tangential direction, the suspension slurry is stratified under the action of gravity, and under the action of centrifugal force, the heterogeneous fine mud in the cyclone cone 4 is thrown to the inner wall of the cyclone cone 4 as high-density material and spirally moves downward, and finally is discharged from the underflow outlet 41, while the fine coal is concentrated to the center of the cyclone cone 4 as a light-density product and spirally rises along the overflow pipe 4 under the action of buoyancy, and finally is discharged from the overflow outlet 51.

[0056] Before the coal slurry water enters the cyclone cone 4, the feed pipe 3 is arranged with a sprayer 2 to eliminate foam. The sprayer 2 comprises an arc-shaped flow guide pipe 21, the flow guide pipe 21 is communicated with an external liquid source, the pipe body of the flow guide pipe 21 is arranged in close contact with the pipe wall at the top of the feed pipe 3, and the pipe body is arranged with a spray head 22, and the spray head 22 is arranged in a radial direction of the feed pipe 3. Uniformly arranged on each spray head 22 are spray holes 221 to form a divergent range spray.

[0057] The feed pipe 3 is also arranged with an inclined suspension partition plate 1 downstream of the sprayer 2, which is inclined to the direction of the discharge outlet 31 along the flow direction in the feed pipe 3.

[0058] The plate surface of the suspension baffle 1 is arranged with rectifying plates 11 in a honeycomb distribution, each rectifying plate 11 cooperates with each other to enclose a honeycomb cavity for the slime water to pass through, the direction of each honeycomb cavity is parallel to the shaft line of the plate body of the suspension baffle 1, after the suspension baffle 1 is inclined, the honeycomb cavity and the feeding direction of the feeding pipe 3 have an included angle. The wave-shaped corrugated plate 111 is arranged in each honeycomb cavity, so that the fluid passing through is turbulent, so as to achieve the effect of sufficient mixing.

[0059] The above describes the basic principles of the present application in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present application. In addition, the above specific details disclosed are only for the purpose of example and for the purpose of understanding, and are not limited to the above specific details, and the above specific details do not limit the present application to be realized by the above specific details.

[0060] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply the connection, arrangement, configuration shown in the block diagram. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0061] It should also be noted that in the devices, equipment and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application.

[0062] The above description of the disclosed aspects is provided so that any person skilled in the art can make or use the present application. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0063] The above description has been given for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A coal slime flotation system, characterized in that, The flotation machine comprises a flotation machine and a slurry preparer (6), the slurry preparer (6) is provided with samplers (7) at different depths, the samplers (7) are used for sampling the slurry to analyze the concentration of different ions in the slurry, an ion compensator (8) is in communication with the slurry preparer (6) to add different reagents to adjust the ion concentration in the slurry, and a slurry outlet of the slurry preparer (6) is in communication with a feed pipe (3) of the flotation machine; The ion compensator (8) comprises reagent tanks (81) for containing different reagents, each reagent tank (81) is in communication with a compensation pipe (82) through a reagent branch pipe (811), the reagent branch pipe (811) and the compensation pipe (82) are respectively provided with first valves (812) and second valves (821) to control the opening and closing of the pipelines, and the reagents are injected into the slurry preparer (6) through the compensation pipe (82), a micro-injection pump (83) and an ejector (84) in sequence; The flotation machine comprises a feed pipe (3) and a cyclone cone (4), a discharge port (31) of the feed pipe (3) is in communication with the inside of the cyclone cone (4) along the tangent direction of the cyclone cone (4), and the interface between the discharge port (31) and the cyclone cone (4) is sealed by a sealing ring; the feed pipe (3) is provided with a suspension baffle (1), the surface of the suspension baffle (1) is uniformly provided with honeycomb-shaped rectifier plates (11) to form a plurality of groups of honeycomb cavities for the passage of slime water, and each honeycomb cavity has an included angle with the feeding direction of the feed pipe (3); The suspension baffle (1) is arranged in the feed pipe (3) to be inclined to the direction of the discharge port (31) of the feed pipe (3) along the feeding direction, and each honeycomb cavity is provided with a wave-shaped corrugated plate (111); the suspension baffle (1) is arranged in at least two groups and uniformly spaced along the length direction of the feed pipe (3); The sampler (7) is provided with a sampling inlet channel (71) in communication with the inner cavity of the sampler (7), the inner cavity of the sampler (7) is provided with a sampling pipe (731) coaxially inserted into the sampling inlet channel (71), one end of the sampling pipe (731) in the inner cavity of the sampler (7) is in a closed state, the sampling pipe (731) is provided with a sampling hole (7311) on the pipe body for the passage of slurry, and the sampling pipe (731) is driven by a power source to slide along the length direction of the sampling inlet channel (71) to make the cavity wall of the sampling inlet channel (71) block the sampling hole (7311) or the sampling hole (7311) communicate with the inner cavity of the sampler (7); The first piston (73) and the second piston (74) are arranged in the inner cavity of the sampler (7), and the inner cavity of the sampler (7) is sequentially divided into a sampling cavity (77), a buffer cavity (76) and a sealing cavity (75) in the direction away from the sampling inlet channel (71) by the first piston (73) and the second piston (74), the first piston (73) and the second piston (74) are connected and fixed by a connecting rod (761), a power source is arranged in the sealing cavity (75) to drive the second piston (74) to slide with the inner cavity of the sampler (7), a sampling pipe (731) is fixed on the first piston (73) and extends from the sampling cavity (77) into the sampling inlet channel (71); a sampling outlet for discharging ore pulp is also arranged on the sampler (7), and the sampling outlet is in communication with the buffer cavity (76) and the sampling cavity (77) alternatively when the second piston (74) is driven to move by the power source; The sampling outlet is arranged on the side wall of the sampler (7) and is in communication with a sampling outlet pipe (72), and an electromagnetic valve (721) for controlling the opening and closing of the pipeline is arranged in the sampling outlet pipe (72); A spring (751) is arranged between the second piston (74) and the inner cavity of the sampler (7) in the length direction of the sampling inlet channel (71), and a pressure sensor (752) for controlling the opening and closing of the electromagnetic valve (721) is arranged at the contact surface of the cavity wall of the sampler (7) and / or the second piston (74) and the spring (751).

2. A coal slurry flotation system according to claim 1, characterised in that, The sampling inlet channel (71) is arranged at the bottom of the sampler (7) in the vertical direction.

3. A coal slurry flotation system according to claim 1, characterised in that, The power source is an electric push rod (753) arranged in the sealing cavity (75) in the length direction of the sampling inlet channel (71), and the two ends of the electric push rod (753) are connected and fixed with the cavity wall of the sampler (7) and the first piston (73) respectively; the shell of the sampler (7) is in the shape of an ellipsoid with a smooth surface.

4. A coal slurry flotation system according to claim 1, characterised in that, The bottom of the cyclone cone (4) is provided with an underflow port (41) for discharging fine mud, and an overflow pipe (5) is arranged in the cyclone cone (4) in the axial direction, the bottom of the overflow pipe (5) extends to the underflow port (41) for the fine coal to enter, and the top of the overflow pipe (5) is provided with an overflow port (51) extending to the outside of the cyclone cone (4) for discharging the fine coal; the spray (2) for eliminating foam is arranged in the inlet pipe (3) at the upstream end of each suspension partition (1); the spray (2) comprises an arc-shaped flow guide pipe (21) matched with the top pipe wall of the inlet pipe (3), and the spray head (22) is uniformly arranged on the flow guide pipe (21) in the radial direction of the inlet pipe (3), and the spray holes (221) are uniformly arranged on each spray head (22) to form a range of spraying.

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