Peat flotation device and flotation method thereof

Abstract

The invention discloses a peat flotation device and a flotation method thereof, and belongs to the technical field of peat flotation. The peat flotation device comprises a flotation tank, a flotation mechanism and a foam scraping mechanism. A foam discharging opening is formed in the top of the flotation tank, and an arc-shaped plate is fixed to the tank wall of the flotation tank; the flotation mechanism comprises a motor and a feeding assembly. The motor is fixedly connected to the outer bottom of the flotation tank. Fan blades are fixed to an output shaft of the motor. The feeding assembly comprises a feeding pipe, the feeding pipe is transversely installed in the flotation tank through a supporting rod, and the feeding end of the feeding pipe penetrates through the flotation tank and is located outside the flotation tank; the foam scraping mechanism comprises two supporting blocks fixed to the top of the flotation tank, a rotating shaft is rotationally connected to the two supporting blocks, scraping plates are fixedly connected to the two opposite sides of the rotating shaft, and the two scraping plates are used for driving foam of target coal to be pushed to the arc-shaped plate from the foam discharging opening and then discharged out of the flotation tank during rotation. According to the scheme, the problem that the flotation efficiency is reduced due to the fact that bubbles are generally large and uneven in distribution in an existing flotation device for achieving bubble generation through an air nozzle is solved.

Description

Technical Field

[0001] The invention relates to the technical field of peat flotation, and in particular to a peat flotation device and a flotation method thereof. Background Art

[0002] Flotation is the most economical and effective separation method for coal and mineral resources. The flotation process uses the surface properties of particles. Particles with good surface hydrophobicity are easy to attach to bubbles and float up as concentrates, while hydrophilic gangue particles remain in the slurry and are discharged as tailings. Flotation devices are used in flotation, but current flotation devices use an aeration device to generate bubbles through air nozzles. However, this type of bubble generation method produces large bubbles and uneven distribution, which reduces the bubble utilization rate, thereby affecting the effective attachment of mineral particles and resulting in low flotation efficiency. Summary of the invention

[0003] The present invention is intended to provide a peat flotation device and a flotation method thereof, so as to solve the problem that the bubbles of the existing flotation device which realizes bubble generation through air nozzles are large and unevenly distributed.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a peat flotation device, comprising a flotation tank, a flotation mechanism and a froth scraping mechanism, wherein a froth discharge port is provided at the top of a tank wall on one side of the flotation tank, an arc-shaped plate with an inner concave surface facing upward is fixedly connected to the tank wall of the flotation tank, and the upper surface of the lower end of the arc-shaped plate is located in the same plane as the bottom surface of the froth discharge port;

[0005] The flotation mechanism comprises a motor and a feeding assembly, wherein the motor is fixedly connected to the outer bottom of the flotation tank, the output shaft of the motor vertically passes through the bottom of the flotation tank and is located in the flotation tank, and the output shaft of the motor is fixedly connected with a fan blade; the feeding assembly comprises a feeding pipe, which is transversely fixedly installed in the flotation tank through a support rod, the feeding end of the feeding pipe passes through the flotation tank and is located outside the flotation tank, and one end of the feeding pipe located in the flotation tank is bent downward and faces the fan blade;

[0006] The scraping mechanism includes two support blocks fixedly connected to the top of the flotation tank, and the two support blocks are rotatably connected with a transversely arranged rotating shaft, which is driven by a driving motor, and scrapers are fixedly connected on opposite sides of the rotating shaft. The two scrapers are used to push the foam of the target coal from the foam discharge port to the arc plate and then discharge it from the flotation tank when rotating.

[0007] The working principle of the present invention is as follows: during flotation, peat slurry with collector, frother and other auxiliary agents added is input into the flotation tank through the feed pipe. When the liquid level of the peat slurry is in the same plane as the bottom surface of the foam discharge port or slightly higher than the bottom surface of the foam discharge port, the input of the peat slurry is stopped, and then the motor is started. When the motor is running, the fan blade is driven to rotate at high speed through the output shaft. When the fan blade rotates at high speed, a local low-pressure area is created during the rotation process, which triggers the cavitation effect and generates a large number of tiny bubbles. Then the target mineral is attached to the surface of the bubble and floats to the liquid surface to form a foam layer, while the non-target mineral remains at the bottom of the slurry. The rotation of the fan blade causes the slurry to flow in a circular shape in the flotation tank. During the flow of the slurry, the foam layer is driven to gradually move to the foam discharge port. When the drive motor is running, the scraper is driven to rotate with the shaft as the center of the circle through the rotating shaft. During the rotation of the scraper, the foam layer is pushed from the foam discharge port to the arc plate and discharged through the arc plate.

[0008] Beneficial effects of the present invention:

[0009] 1. In this scheme, the fan blades rotate at high speed to create a local low-pressure area, triggering a cavitation effect, and then generating a large number of tiny bubbles. Compared with the traditional aeration method, this method can distribute the bubbles more evenly, and the bubble size is smaller, which increases the chance of contact between bubbles and mineral particles, thereby enhancing the flotation efficiency. In addition, this method can more accurately control the size and distribution of bubbles, thereby improving the sorting efficiency, reducing energy consumption and the resulting greenhouse gas emissions.

[0010] 2. When the fan blades rotate, not only bubbles are generated, but also the slurry is forced to form a circular flow in the flotation tank, ensuring sufficient mixing inside the slurry, so that the collector, frother and other reagents can be more evenly dispersed in the entire slurry, which is beneficial to improve the selective attachment rate of the target mineral, thereby improving the utilization rate of the collector, frother and other reagents, reducing unnecessary reagent waste and environmental pollution, and thus achieving the purpose of reducing the pollution load on the environment.

[0011] 3. When the rotation of the fan blades is not enough to generate enough bubbles, gas can be added to the flotation tank through the feed pipe. The gas flows directly to the high-speed rotating fan blades through the outlet of the feed pipe. The fan blades quickly break up the bubbles into small bubbles, thereby ensuring that there are enough bubbles to contact with the mineral particles and float up. At the same time, the amount of bubbles is increased by adding additional gas, thereby achieving the purpose of improving the flotation efficiency.

[0012] 4. The combination of the scraper mechanism and the curved plate ensures that the foam layer can be discharged smoothly out of the flotation tank, avoiding the possibility of secondary mixing into the pulp. In addition, this design can also prevent additional water loss and pollution caused by foam overflow.

[0013] Furthermore, the end of the feed pipe outside the flotation tank is closed, and the end of the feed pipe is fixedly connected to a feed motor, the output shaft of the feed motor passes through the feed pipe and is located inside the feed pipe, a spiral dragon is provided inside the feed pipe, the spiral dragon is coaxially fixedly connected to the output shaft of the feed motor, the end of the feed pipe outside the flotation tank is fixedly connected to a vertical feed pipe, and the feed reduction pipe is connected to the feed pipe. The purpose is to use the feed pipe to inject slurry into the feed pipe through this arrangement, and when the flotation needs to be continuously and a small amount of slurry is added after a period of time, the spiral dragon driven by the feed motor rotates to push a small amount of slurry into the flotation tank.

[0014] Furthermore, a fixed tube is sleeved on the output shaft of the motor, and the bottom end of the fixed tube is fixedly connected to the flotation tank. The purpose is to allow the output shaft of the motor to rotate in the fixed tube through this arrangement, so as to avoid stirring the slurry in the lower layer of the flotation tank, so that other slag that has been settled can float again.

[0015] Furthermore, a partition is fixedly connected to the lower part of the flotation tank, the partition is located below the fan blades, and a plurality of funnel-shaped feed holes are provided on the partition, and the feed holes are in contact with the edges of the feed holes. The purpose is that through this arrangement, the precipitated slag falls to the bottom of the flotation tank through the feed holes, and the partition can reduce the influence of the rotation of the fan blades on the slurry at the bottom of the flotation tank, and reduce the possibility of driving the flow of the slurry at the bottom.

[0016] Furthermore, a guide plate is fixedly connected to the top of the flotation tank wall, and the guide plate is located at the foam discharge port, and the lower surface of the guide plate is in the same plane as the liquid surface of the slurry. The purpose is to block the foam on the surface of the slurry through the guide plate, so that the foam stays at the foam discharge port, which is convenient for the scraper to scrape it out.

[0017] Furthermore, the feeding assembly also includes a pretreatment mechanism, which includes an intermediate box and a mixing box. A double-shaft mixing motor is fixedly connected to the bottom of the mixing box, an output shaft of the mixing motor vertically passes through the mixing box and is located in the mixing box, and a mixing blade is fixedly connected to the output shaft; a feeding hopper is fixedly connected to the top of the mixing box, the bottom end of the feeding hopper vertically passes through the top of the mixing box and is connected to the inside of the mixing box, and a control switch is installed on the feeding hopper, and the control switch is used to control the feeding speed of the feeding hopper;

[0018] A medicine box is fixedly installed on the top of the mixing box, and a vertical medicine tube is connected to the bottom of the medicine box. The bottom end of the medicine tube vertically passes through the mixing box downward and is connected to the inside of the mixing box; the intermediate box is fixed to the outer bottom of the mixing box, and a vertical material guide pipe is arranged at the bottom of the mixing box. The material guide pipe connects the mixing box with the intermediate box, and an electromagnetic valve is installed in the material guide pipe. A propeller is fixedly connected to the other output shaft of the mixing motor, and the end of the feed pipe away from the supply pipe is tilted upward, passes through the bottom of the intermediate box and is connected to the inside of the intermediate box, and a switch valve is provided on the feed pipe.

[0019] When in use, through this setting, an appropriate amount of water can be added to the mixing box first, and the stirring motor can be started. When the stirring motor is running, the stirring blades can be driven to rotate and then the water can be driven to flow in the mixing box. The crushed material is added to the feeding hopper according to the ratio with water. At this time, the material falls into the mixing box under the action of gravity and is mixed and stirred with the flowing water to obtain slurry. At the same time, the feeding speed of the material in the feeding hopper can be adjusted by the control switch to avoid a large amount of feeding affecting the stirring effect. In the process of logistics feeding, the collector, foaming agent and other auxiliary agents are added to the agent box. At this time, the agent in the agent box slowly flows into the mixing box through the agent pipe. Such continuous flow increases the contact surface between the agent and the stirring slurry and improves the mixing efficiency of the agent. After the slurry and the agent are mixed, the solenoid valve and the switch valve are opened, and the mixed slurry flows into the intermediate box through the guide pipe, and then flows into the feed pipe through the inclined feed pipe. After all the slurry in the mixing box flows into the middle box, water, materials and reagents can be added again for mixing. During the mixing process, the mixing motor drives the propeller to rotate, driving the slurry in the middle box to flow, ensuring the uniformity of the slurry and avoiding static stratification. In this way, not only can the peat pretreatment be achieved and the efficiency of peat pretreatment be improved, but also the material addition can be controlled through the feeding hopper to achieve the purpose of controlling the slurry concentration. Through the concentration control of the flotation feed, the concentration of the flotation feed is adjusted, and the feed is adjusted to a reasonable concentration range, thereby improving the flotation separation selectivity and ensuring the quality of clean coal.

[0020] A peat flotation method comprises the following steps:

[0021] Step 1, raw material preparation: crush the peat ore using a crusher to a particle size of 1 to 20 mm;

[0022] Step 2, screening: screening the material obtained after crushing the peat ore in step 1 to ensure that the particle size of the screened material is the same;

[0023] Step 3, preparing slurry: mixing the material in step 2 with water to form slurry, with the ratio of material to water being 1:3-5;

[0024] Step 4, adding reagents: adding collectors, frothers and other auxiliary reagents to the slurry prepared in step 3;

[0025] Step 5, pretreatment: The pretreatment mechanism adjusts the feed concentration of the flotation according to the flotation demand to ensure that the feed concentration is at a reasonable concentration, and the flotation agent is fully dispersed through the external force of the stirring blade and the propeller, so that the flotation agent is fully mixed with the slurry and evenly dispersed in the slurry, which is conducive to the formation of a stable oil film on the surface of the coal particles, so as to increase the flotation speed of the coarse coal particles;

[0026] Step 6, flotation: adding the ore pulp with added reagents into the flotation device of this scheme for flotation.

[0027] Furthermore, the collector is selected from tall oil, alkylamine or sodium oleate;

[0028] The foaming agent is selected from rosin oil, methyl isobutyl carbinol, octanol, dodecanol or sodium dodecylbenzene sulfonate;

[0029] The auxiliary agents include pH adjusters: sulfuric acid, sodium hydroxide or lime;

[0030] Activator: copper sulfate;

[0031] Inhibitor: cyanide or water glass;

[0032] Dispersant: sodium hexametaphosphate or polyacrylamide;

[0033] Flocculant: polyaluminium chloride or polyacrylamide.

[0034] Furthermore, the amount of collector added is 0.1-2 kg / ton of dry peat; the amount of foaming agent added is 0.05-0.5 kg / ton of dry peat; pH regulator, activator, inhibitor, dispersant and flocculant are added according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of a peat flotation device embodiment 1 of the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of the middle curved plate;

[0037] Figure 3 This is a schematic diagram of the structure of a peat flotation device in Example 2. DETAILED DESCRIPTION

[0038] The following is further described in detail through specific implementation methods:

[0039] The figure marks in the drawings of the specification include: guide plate 1, slurry 2, flotation tank 3, feed pipe 4, feed motor 5, spiral dragon 6, feed pipe 7, partition 8, material hole 9, fan blade 10, fixed pipe 11, motor 12, arc plate 13, scraper 14, rotating shaft 15, foam discharge port 16, feeding hopper 17, stirring box 18, stirring blade 19, solenoid valve 20, guide pipe 21, intermediate box 22, stirring motor 23, propeller 24, switch valve 25, reagent pipe 26, reagent box 27, control switch 28.

[0040] Embodiment 1 is basically as attached Figure 1 and attached Figure 2 As shown:

[0041] A peat flotation device comprises a flotation tank 3, a flotation mechanism and a froth scraping mechanism. A froth discharge port 16 is provided at the top of a tank wall on one side of the flotation tank 3. A guide plate 1 is fixedly connected to the top of the tank wall of the flotation tank 3, and the guide plate 1 is located at the froth discharge port 16. The lower surface of the guide plate 1 is in the same plane as the liquid surface of the ore pulp 2. An arc plate 13 with an upward concave surface is fixedly connected to the tank wall of the flotation tank 3. The upper surface of the lower end of the arc plate 13 is in the same plane as the bottom surface of the froth discharge port 16. The higher end of the arc plate 13 is bent downward, and the bending part is rounded. A partition plate 8 is fixedly connected to the lower part of the flotation tank 3. The partition plate 8 is located below the fan blade 10. The partition plate 8 is provided with a plurality of funnel-shaped material penetration holes 9, and the edges of the material penetration holes 9 are in contact with each other.

[0042] The flotation mechanism includes a motor 12 and a feeding assembly. The motor 12 is fixedly connected to the outer bottom of the flotation tank 3. The output shaft of the motor 12 vertically passes through the bottom of the flotation tank 3 and is located in the flotation tank 3. The output shaft of the motor 12 is fixedly connected with a fan blade 10. The output shaft of the motor 12 is sleeved with a fixed pipe 11. The bottom end of the fixed pipe 11 is fixedly connected to the flotation tank 3. The feeding assembly includes a feeding pipe 7. The feeding pipe 7 is transversely fixedly installed in the flotation tank 3 through a support rod. The feeding end of the feeding pipe 7 passes through the flotation tank 3 and is located Outside the flotation tank 3, one end of the feed pipe 7 located inside the flotation tank 3 is bent downward and faces the fan blade 10; the end of the feed pipe 7 located outside the flotation tank 3 is closed, and the end of the feed pipe 7 is fixedly connected to the feeding motor 5, the output shaft of the feeding motor 5 passes through the feed pipe 7 and is located inside the feed pipe 7, a spiral dragon 6 is provided in the feed pipe 7, the spiral dragon 6 is coaxially fixedly connected to the output shaft of the feeding motor 5, the end of the feed pipe 7 located outside the flotation tank 3 is fixedly connected to the vertical feed pipe 4, and the material reduction pipe is connected to the feed pipe 7.

[0043] The scraping mechanism includes two support blocks fixedly connected to the top of the flotation tank 3, and the two support blocks are rotatably connected with a transversely arranged rotating shaft 15, which is driven by a driving motor. Scrapers 14 are fixedly connected on opposite sides of the rotating shaft 15. The two scrapers 14 are used to push the foam of the target coal from the foam discharge port 16 to the arc plate 13 and then discharge it from the flotation tank 3 when rotating.

[0044] The specific implementation process is as follows:

[0045] During flotation, the peat slurry 2 to which collectors, frothers and other auxiliary agents are added is injected through the feed pipe 4 and then input into the flotation tank 3 through the feed pipe 7. When the liquid level of the peat slurry 2 is in the same plane as or slightly higher than the bottom surface of the foam discharge port 16, the input of the peat slurry 2 is stopped, and then the motor 12 is started. When the motor 12 is running, the fan blades 10 are driven to rotate at high speed through the output shaft. When the fan blades 10 rotate at high speed, a local low-pressure area is created during the rotation process, which triggers a cavitation effect, thereby generating a large number of tiny bubbles, and then the target minerals are attached to the surface of the bubbles and float to the liquid surface to form a foam layer, while non-target minerals are left. At the bottom of the slurry 2, the precipitated non-target minerals fall into the bottom of the flotation tank 3 through the permeable holes 9, and the partition 8 can reduce the impact of the rotation of the fan blades 10 on the slurry 2 at the bottom of the flotation tank 3. The rotation of the fan blades 10 causes the slurry 2 to flow in a circular shape in the flotation tank 3. During the flow of the slurry 2, the foam layer is driven to gradually move to the foam discharge port 16. At this time, the foam layer is blocked by the guide plate 1 and stays, and will not continue to flow with the flow of the slurry 2. When the drive motor is running, the scraper 14 is driven by the shaft 15 to rotate with the shaft 15 as the center. During the rotation of the scraper 14, the foam layer is pushed from the foam discharge port 16 to the arc plate 13 and discharged through the arc plate 13.

[0046] A peat flotation method comprises the following steps:

[0047] Step 1, raw material preparation: crush the peat ore using a crusher to a particle size of 1 to 20 mm;

[0048] Step 2, screening: screening the material obtained after crushing the peat ore in step 1 to ensure that the particle size of the screened material is the same;

[0049] Step 3, preparing slurry: mixing the material in step 2 with water to form slurry, with the ratio of material to water being 1:3-5;

[0050] Step 4, adding reagents: add collectors, foaming agents and other auxiliary agents to the slurry prepared in step 3; the collector is selected from tall oil, alkylamine or sodium oleate; the foaming agent is selected from rosin oil, methyl isobutyl carbinol, octanol, dodecanol or sodium dodecylbenzene sulfonate; the auxiliary agents include pH regulators: sulfuric acid, sodium hydroxide or lime; activator: copper sulfate; inhibitor: cyanide or water glass; dispersant: sodium hexametaphosphate or polyacrylamide; flocculant: polyaluminum chloride or polyacrylamide. The amount of collector added is 0.1-2 kg / ton of dry peat; the amount of foaming agent added is 0.05-0.5 kg / ton of dry peat; pH regulator, activator, inhibitor, dispersant and flocculant are added according to actual conditions.

[0051] Step 5, pretreatment: The pretreatment mechanism adjusts the feed concentration of the flotation according to the flotation demand to ensure that the feed concentration is at a reasonable concentration, and the flotation agent is fully dispersed through the external force of the stirring blade and the propeller, so that the flotation agent is fully mixed with the slurry and evenly dispersed in the slurry, which is conducive to the formation of a stable oil film on the surface of the coal particles, so as to increase the flotation speed of the coarse coal particles;

[0052] Step six, adding the ore pulp with added reagents into the flotation device of this scheme for flotation.

[0053] Example 2

[0054] The difference between Example 2 and Example 1 is as shown in the attached Figure 3 As shown: the feeding assembly also includes a pretreatment mechanism, which includes an intermediate box 22 and a mixing box 18. A double-shaft mixing motor 23 is fixedly connected to the bottom of the mixing box 18. An output shaft of the mixing motor 23 vertically passes through the mixing box 18 and is located in the mixing box 18, and a mixing blade 19 is fixedly connected to the output shaft; a feeding hopper 17 is fixedly connected to the top of the mixing box 18, and the bottom end of the feeding hopper 17 vertically passes through the top of the mixing box 18 and is connected to the inside of the mixing box 18. A control switch 28 is installed on the feeding hopper 17, and the control switch 28 is used to control the feeding speed of the feeding hopper 17;

[0055] A medicine box 27 is fixedly installed on the top of the mixing box 18, and a vertical medicine tube 26 is connected to the bottom of the medicine box 27. The bottom end of the medicine tube 26 vertically passes through the mixing box 18 downward to be connected with the inside of the mixing box 18; the intermediate box 22 is fixed to the outer bottom of the mixing box 18, and a vertical material guide pipe 21 is arranged at the bottom of the mixing box 18. The material guide pipe 21 connects the mixing box 18 with the intermediate box 22. A solenoid valve 20 is installed in the material guide pipe 21, and a propeller 24 is fixedly connected to the other output shaft of the mixing motor 23. The end of the feed pipe 4 away from the supply pipe 7 is tilted upward and passes through the bottom of the intermediate box 22 to be connected with the inside of the intermediate box 22. A switch valve 25 is provided on the feed pipe 4.

[0056] When in use, through this arrangement, an appropriate amount of water can be added to the mixing box 18 first, and the stirring motor 23 can be started. When the stirring motor 23 is running, the stirring blade 19 is driven to rotate and then the water is driven to flow in the mixing box 18. The crushed material is added to the feeding hopper 17 according to the ratio with water. At this time, the material falls into the mixing box 18 under the action of gravity and is mixed and stirred with the flowing water to obtain slurry. At the same time, the feeding speed of the material in the feeding hopper 17 can be adjusted by controlling the switch 28 to avoid a large amount of feeding affecting the stirring effect. In the process of logistics feeding, the collector, foaming agent and other auxiliary agents are added to the agent box 27. At this time, the agent in the agent box 27 slowly flows into the mixing box 18 through the agent pipe 26. Such continuous flow increases the contact surface between the agent and the stirring slurry, and improves the mixing efficiency of the agent. After the slurry and the agent are mixed, the solenoid valve 20 and the switch valve 25 are opened, and the mixed slurry flows into the intermediate box 22 through the guide pipe 21, and then flows into the feed pipe 7 through the inclined feed pipe 4. After all the slurry in the mixing box 18 flows into the intermediate box 22, water, materials and reagents can be added again for mixing. During the mixing process, the mixing motor 23 drives the propeller 24 to rotate, driving the slurry in the intermediate box 22 to flow, ensuring the uniformity of the slurry and avoiding static stratification. In this way, not only can the peat pretreatment be achieved and the efficiency of peat pretreatment be improved, but also the material addition can be controlled through the feeding hopper 17 to achieve the purpose of controlling the slurry concentration. Through the concentration control of the flotation feed, the concentration of the flotation feed is adjusted, and the feed is adjusted to a reasonable concentration range, thereby improving the flotation sorting selectivity and ensuring the quality of clean coal.

Claims

1. A peat flotation device, characterized in that: It comprises a flotation tank, a flotation mechanism and a froth scraping mechanism, wherein a froth discharge port is provided at the top of one side of the tank wall of the flotation tank, an arc-shaped plate with an inner concave surface facing upward is fixedly connected to the tank wall of the flotation tank, and the upper surface of the lower end of the arc-shaped plate is located in the same plane as the bottom surface of the froth discharge port; The flotation mechanism comprises a motor and a feeding assembly, wherein the motor is fixedly connected to the outer bottom of the flotation tank, the output shaft of the motor vertically passes through the bottom of the flotation tank and is located in the flotation tank, and the output shaft of the motor is fixedly connected with a fan blade; the feeding assembly comprises a feeding pipe, which is transversely fixedly installed in the flotation tank through a support rod, the feeding end of the feeding pipe passes through the flotation tank and is located outside the flotation tank, and one end of the feeding pipe located in the flotation tank is bent downward and faces the fan blade; The scraping mechanism includes two support blocks fixedly connected to the top of the flotation tank, and the two support blocks are rotatably connected with a transversely arranged rotating shaft, which is driven by a driving motor, and scrapers are fixedly connected on opposite sides of the rotating shaft. The two scrapers are used to push the foam of the target coal from the foam discharge port to the arc plate and then discharge it from the flotation tank when rotating.

2. A peat flotation device according to claim 1, characterized in that: The end of the feed pipe located outside the flotation tank is closed, and the end of the feed pipe is fixedly connected to a feeding motor, the output shaft of the feeding motor passes through the feed pipe and is located in the feed pipe, a spiral dragon is provided in the feed pipe, the spiral dragon is coaxially fixedly connected to the output shaft of the feeding motor, the end of the feed pipe located outside the flotation tank is fixedly connected to a vertical feeding pipe, and the material reduction pipe is connected to the feed pipe.

3. A peat flotation device according to claim 2, characterized in that: A fixed pipe is sleeved on the output shaft of the motor, and the bottom end of the fixed pipe is fixedly connected to the flotation tank.

4. A peat flotation device according to claim 3, characterized in that: The lower part of the flotation tank is fixedly connected with a partition plate, which is located below the fan blades. The partition plate is provided with a plurality of funnel-shaped material penetration holes, and the edges of the material penetration holes are in contact with each other.

5. A peat flotation device according to claim 4, characterized in that: A guide plate is fixedly connected to the top of the flotation tank wall, and the guide plate is located at the froth discharge port, and the lower surface of the guide plate is located in the same plane as the liquid surface of the ore pulp.

6. A peat flotation device according to claim 5, characterized in that: The feeding assembly also includes a pretreatment mechanism, which includes an intermediate box and a mixing box. A double-shaft mixing motor is fixedly connected to the bottom of the mixing box. An output shaft of the mixing motor vertically passes through the mixing box and is located in the mixing box, and a mixing blade is fixedly connected to the output shaft. A feeding hopper is fixedly connected to the top of the mixing box. The bottom end of the feeding hopper vertically passes through the top of the mixing box and is connected to the inside of the mixing box. A control switch is installed on the feeding hopper, and the control switch is used to control the feeding speed of the feeding hopper. A medicine box is fixedly installed on the top of the mixing box, and a vertical medicine tube is connected to the bottom of the medicine box. The bottom end of the medicine tube vertically passes through the mixing box downward and is connected to the inside of the mixing box; the intermediate box is fixed to the outer bottom of the mixing box, and a vertical material guide pipe is arranged at the bottom of the mixing box. The material guide pipe connects the mixing box with the intermediate box, and an electromagnetic valve is installed in the material guide pipe. A propeller is fixedly connected to the other output shaft of the mixing motor, and the end of the feed pipe away from the supply pipe is tilted upward, passes through the bottom of the intermediate box and is connected to the inside of the intermediate box, and a switch valve is provided on the feed pipe.

7. A peat flotation method according to claim 1, characterized in that: The following steps are involved: Step 1, raw material preparation: crush the peat ore using a crusher to a particle size of 1 to 20 mm; Step 2, screening: screening the material obtained after crushing the peat ore in step 1 to ensure that the particle size of the screened material is the same; Step 3, preparing slurry: mixing the material in step 2 with water to form slurry, with the ratio of material to water being 1:3-5; Step 4, adding reagents: adding collectors, frothers and other auxiliary reagents to the slurry prepared in step 3; Step 5, pretreatment: The pretreatment mechanism adjusts the feed concentration of the flotation according to the flotation demand to ensure that the feed concentration is at a reasonable concentration, and the flotation agent is fully dispersed through the external force of the stirring blade and the propeller, so that the flotation agent is fully mixed with the slurry and evenly dispersed in the slurry, which is conducive to the formation of a stable oil film on the surface of the coal particles, so as to increase the flotation speed of the coarse coal particles; Step 6, flotation: adding the ore pulp with added reagents into the flotation device in this scheme for flotation.

8. A peat flotation method according to claim 7, characterized in that: The collector is selected from tall oil, alkylamine or sodium oleate; The foaming agent is selected from rosin oil, methyl isobutyl carbinol, octanol, dodecanol or sodium dodecylbenzene sulfonate; The auxiliary agents include pH adjusters: sulfuric acid, sodium hydroxide or lime; Activator: copper sulfate; Inhibitor: cyanide or water glass; Dispersant: sodium hexametaphosphate or polyacrylamide; Flocculant: polyaluminium chloride or polyacrylamide.

9. A peat flotation method according to claim 8, characterized in that: The amount of collector added is 0.1-2 kg / ton of dry peat; the amount of foaming agent added is 0.05-0.5 kg / ton of dry peat; pH adjuster, activator, inhibitor, dispersant and flocculant are added according to actual conditions.

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