A lignite flotation and deashing device

Abstract

The invention discloses a lignite flotation and deashing device, which relates to the technical field of lignite sorting, and comprises a raw coal cleaning component, wherein the output end of the raw coal cleaning component is provided with a first crusher, the output end of the first crusher is provided with a first conveying track, the output end of the first conveying track is provided with a vibration screening component, the output end of the vibration screening component is provided with a second conveying track, the output end of the second conveying track is provided with a second crusher, the output end of the second crusher is provided with a third conveying track, the output end of the third conveying track is fixedly provided with a slurry mixing component, the output end of the slurry mixing component is connected with a clean coal flotation component through an output pump, and the work of screening and deashing from raw coal to lignite and clean coal is fully automated, and the transportation process is simplified, the deashing efficiency is further improved, and the quality of lignite is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lignite separation, and in particular to a lignite flotation and deashing device. Background Art

[0002] Lignite, also known as wood coal, is the lowest coalification mineral coal. It is a brown-black, dull low-grade coal between peat and bituminous coal. Because it is rich in volatiles, it is easy to burn and smoke. The traces of the original wood can be clearly seen on the cross section, and humus can be seen. The carbon content of lignite is generally 30%~50%, and the relative density is 1.10~1.40. It is generally blocky, earthy, and powdery. It is soft and plastic, and has strong hygroscopicity. It contains a certain amount of native humic acid, a relatively high carbon and hydrogen content, a low oxygen content, a hydrogen-carbon atomic ratio H / C of generally 0.8~1.6, and a volatile content of generally more than 40%. It is highly reactive, has poor thermal stability, and can be dissolved in organic solvents. It can be obtained by low-temperature dry distillation to obtain coal gas, coal tar or semi-coke. However, due to the high total water content, high internal ash content and low calorific value of lignite, it is not suitable for long-distance transportation.

[0003] The traditional flotation deashing device has a simple pretreatment work for lignite raw materials. Other substances contained in it will greatly reduce the deashing efficiency and increase the deashing cost. In addition, the processing process of the traditional deashing device is usually step-by-step, which will greatly reduce the deashing efficiency and there is a possibility of further contamination of the raw materials.

[0004] Therefore, it is necessary to provide a lignite flotation deashing device to solve the above problems. Summary of the invention

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a lignite flotation and deashing device, comprising a raw coal cleaning component, wherein the output end of the raw coal cleaning component is provided with a first crusher, the output end of the first crusher is provided with a first conveying track, the output end of the first conveying track is provided with a vibration screening component, the output end of the vibration screening component is provided with a second conveying track, the output end of the second conveying track is provided with a second crusher, the output end of the second crusher is provided with a third conveying track, the output end of the third conveying track is fixedly provided with a slurry mixing component, and the output end of the slurry mixing component is connected to the clean coal flotation component through an output pump;

[0006] The raw coal cleaning assembly comprises a fixed support frame, a cleaning pool group is fixedly mounted on the upper end of the fixed support frame, a raw coal conveying track is fixedly arranged at one end of the cleaning pool group, and a raw coal output track is fixedly arranged at the other end;

[0007] A controller, fixedly arranged on one side of the fixed support frame;

[0008] The pressure booster is fixedly arranged below the cleaning pool group. A water pipe is fixedly arranged at the output end of the pressure booster. A plurality of groups of high-pressure nozzles are fixedly arranged on the water pipe. Each group of high-pressure nozzles is arranged above the cleaning pool group.

[0009] Further, preferably, the cleaning pool group comprises:

[0010] A cleaning tank, wherein a plurality of sets of fixing hoops are fixedly installed inside the cleaning tank, a debris removal screen is coaxially fixedly installed between the plurality of sets of fixing hoops, a screw conveyor is arranged inside the debris removal screen, and the screw conveyor is rotatably installed on the side wall of the cleaning tank;

[0011] A debris carrying plate is fixedly mounted on the inner wall of the lower inner end of the cleaning tank. The debris carrying plate is tilted, and a debris collecting drawer is arranged on the tilted side of the debris carrying plate. The debris collecting drawer is slidably arranged on the inner wall of the bottom of the cleaning tank.

[0012] Further, preferably, a gap is reserved between the screw conveyor and the debris removal screen, and a raw coal output track is fixedly provided on the output side of the debris removal screen, and the input side of the raw coal output track is provided below the screw conveyor.

[0013] Further, as a preference, the vibration screening assembly comprises:

[0014] A support frame, on which a vibrating screen is fixedly mounted, wherein an input end of the vibrating screen is fixedly provided with a coal block inlet, and the coal block inlet is arranged directly below the output end of the first conveying track;

[0015] The output end of the vibrating screen is fixedly provided with a light material output belt, a lignite output belt and a heavy material output belt, the output end of the lignite output belt is provided with a second conveying track, and the output ends of the light material output belt and the heavy material output belt are connected to external processing equipment.

[0016] Further, as a preference, the slurry mixing assembly comprises:

[0017] A fixed frame, on which a stirring driver is fixedly arranged, an output end of the stirring driver is fixedly equipped with a stirrer, the stirrer is arranged inside a mixing tank, and the mixing tank is fixedly assembled on the fixed frame;

[0018] A flotation reagent tank is fixedly mounted on the upper surface of the fixing frame, and an output end of the flotation reagent tank is connected to a mixing tank.

[0019] Further, as a preference, the clean coal flotation assembly comprises:

[0020] A flotation tank, a liquid collection circulation tank is fixedly arranged on one side of the flotation tank near the raw coal cleaning component, a liquid adding pipe is arranged on the other side of the flotation tank, and a plurality of groups of bubble output pipes are fixedly arranged on the side wall at the lower end of the flotation tank, the bubble output pipes are connected to the output end of the bubble generator, and the bubble generator is fixedly arranged on one side of the flotation tank near the raw coal cleaning component;

[0021] Two groups of concentrate foam layer guide plates are arranged at the upper end of the flotation tank, an output port is provided on one side of the flotation tank close to the liquid collection circulation tank, the output port is arranged in the middle of one end of the concentrate foam layer guide plate, and a clean coal collection box is arranged at the liquid collection circulation tank corresponding to each output port;

[0022] The first spiral output track has an upper end which is open and fixedly mounted on the lower surface of the flotation tank. The output end of the first spiral output track is fixedly provided with a second spiral output track.

[0023] Furthermore, preferably, a water delivery pump is provided at the other end of the liquid adding pipe, and a four-way port is provided at the output end of the water delivery pump, and the other two interfaces of the four-way port are respectively connected to an external water delivery device and a clean coal collection box.

[0024] Compared with the prior art, the present invention provides a lignite flotation deashing device, which has the following beneficial effects:

[0025] In the present invention, the raw coal cleaning component will clean the mined raw coal and remove impurities attached to the surface of the raw coal, thereby performing preliminary processing on the raw coal. The first crusher can perform preliminary crushing on the raw coal processed in the first step, and crush the various components in the raw coal into coal blocks with uniform particle sizes, so as to facilitate further processing by subsequent components. The vibration screening component will sort the raw coal with uniform particle sizes by vibration, and screen out the lignite from other mineral materials. The second crusher will crush the screened lignite with uniform particle sizes, thereby completing the entire raw coal pretreatment work, facilitating subsequent flotation work, thereby improving the flotation efficiency of the lignite, and reducing cost losses.

[0026] In the present invention, the slurry mixing component will mix the crushed raw coal, flotation reagents and water and other materials to form a slurry that is easy to float. The clean coal flotation component can float the gangue minerals adsorbed by the collector to the surface of the slurry through the action of bubbles to form a foam product. The lignite is retained in the slurry due to the action of the inhibitor, and is eventually recovered by sedimentation and other methods. The froth product obtained by flotation is further processed, such as dehydration, drying, etc., to obtain a low-ash clean coal product. At the same time, the sediment in the slurry is recovered and processed to make full use of resources.

[0027] In the present invention, the screening and deashing work from raw coal to lignite and clean coal is fully automated, which can significantly reduce the ash content in the coal, improve the calorific value and quality of the coal, and is beneficial to the clean utilization of coal and environmental protection. At the same time, the device avoids the cumbersome steps in the traditional flotation deashing device, simplifies the transportation process, further improves the deashing efficiency, and improves the quality of the lignite. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic diagram of the structure of a lignite flotation and deashing device.

[0029] Figure 2 This is a schematic diagram of the structure of the raw coal cleaning component.

[0030] Figure 3 This is a schematic diagram of the cleaning pool group structure.

[0031] Figure 4 This is a schematic diagram of the vibration screening component structure.

[0032] Figure 5 Schematic diagram of the slurry mixing component structure.

[0033] Figure 6 This is a schematic diagram of the structure of the clean coal flotation component.

[0034] In the figure: 1, raw coal cleaning assembly; 2, first crusher; 3, first conveying track; 4, vibration screening assembly; 5, second conveying track; 6, second crusher; 7, third conveying track; 8, slurry mixing assembly; 9, clean coal flotation assembly; 11, fixed support frame; 12, cleaning tank group; 13, raw coal conveying track; 14, raw coal output track; 15, controller; 16, pressurizer; 17, water pipe; 18, high-pressure nozzle; 121, cleaning tank; 122, fixed hoop; 123, debris removal screen; 124, screw conveyor; 125, debris bearing Plate; 126, debris collection drawer; 41, support frame; 42, vibration screener; 43, coal block inlet; 44, light material output belt; 45, lignite output belt; 46, heavy material output belt; 81, fixed frame; 82, mixing tank; 83, stirring drive; 84, stirrer; 85, flotation agent tank; 91, flotation tank; 92, liquid collection circulation tank; 93, clean coal collection box; 94, liquid adding pipe; 95, bubble generator; 96, bubble output pipe; 97, concentrate foam layer guide plate; 98, first spiral output track; 99, second spiral output track. DETAILED DESCRIPTION

[0035] See also Figure 1 to Figure 6The present invention provides a lignite flotation and deashing device, comprising a raw coal cleaning component 1, wherein the output end of the raw coal cleaning component 1 is provided with a first crusher 2, the output end of the first crusher 2 is provided with a first conveying track 3, the output end of the first conveying track 3 is provided with a vibration screening component 4, the output end of the vibration screening component 4 is provided with a second conveying track 5, the output end of the second conveying track 5 is provided with a second crusher 6, the output end of the second crusher 6 is provided with a third conveying track 7, the output end of the third conveying track 7 is fixedly provided with a slurry mixing component 8, and the output end of the slurry mixing component 8 is connected to a clean coal flotation component 9 through an output pump;

[0036] The raw coal cleaning assembly 1 comprises a fixed support frame 11, a cleaning pool group 12 is fixedly mounted on the upper end of the fixed support frame 11, a raw coal conveying track 13 is fixedly arranged at one end of the cleaning pool group 12, and a raw coal output track 14 is fixedly arranged at the other end;

[0037] A controller 15, fixedly arranged on one side of the fixed support frame 11;

[0038] A pressure booster 16 is fixedly arranged below the cleaning pool group 12, and a water pipe 17 is fixedly arranged at the output end of the pressure booster 16, and a plurality of groups of high-pressure nozzles 18 are fixedly arranged on the water pipe 17, and each group of the high-pressure nozzles 18 is arranged above the cleaning pool group 12;

[0039] As a preferred embodiment, the raw coal cleaning component 1 will clean the mined raw coal and remove impurities attached to the surface of the raw coal, thereby performing preliminary processing on the raw coal. The first crusher 2 can perform preliminary crushing on the raw coal cleaned by the raw coal cleaning component 1, and crush the various components in the raw coal into coal blocks with uniform particle sizes, so as to facilitate further processing by subsequent components. The vibration screening component 4 will sort the raw coal with uniform particle sizes by vibration, and screen the lignite from other mineral materials. The second crusher 6 will crush the screened lignite with uniform particle sizes, thereby completing the pretreatment of the entire raw coal, which is convenient for subsequent flotation work. The ore pulp mixing component 8 will mix the crushed raw coal, flotation agent, water and other materials, so as to form an ore pulp that is convenient for flotation. The clean coal flotation assembly 9 can float the gangue minerals adsorbed with the collector to the surface of the mixed slurry through the action of bubbles to form a foam product, while the lignite remains in the slurry due to the action of the inhibitor, and is finally recovered by sedimentation and the like. The froth product obtained by floating is further processed, such as dehydration, drying, etc., to obtain a clean coal product with low ash content. At the same time, the sediment in the slurry is recovered and processed to make full use of resources. The mined raw coal is transported to the cleaning tank group 12 through the raw coal conveying track 13. The cleaning tank group 12 will drive the raw coal to rotate and move forward, and wash away the impurities on the surface of the raw coal under the action of the water flow output by the upper high-pressure nozzle 18, and then the cleaned raw coal will be output through the raw coal output track 14, and then subsequent operations will be carried out.

[0040] Further, the cleaning pool group 12 includes:

[0041] A cleaning tank 121 is fixedly provided with a plurality of sets of fixing hoops 122 on its inner side, and a debris removal screen 123 is coaxially fixedly provided between the plurality of sets of fixing hoops 122. A screw conveyor 124 is provided on the inner side of the debris removal screen 123, and the screw conveyor 124 is rotatably provided on the side wall of the cleaning tank 121;

[0042] A debris carrying plate 125 is fixedly mounted on the inner wall of the lower inner end of the cleaning tank 121. The debris carrying plate 125 is tilted, and a debris collecting drawer 126 is provided on the tilted side of the debris carrying plate 125. The debris collecting drawer 126 is slidably arranged on the inner wall at the bottom of the cleaning tank 121.

[0043] As a preferred embodiment, the screw conveyor 124 can drive the raw coal to rotate and move, so that the impurities on the surface of the raw coal can be fully removed. The setting of the debris removal screen 123 on the outside can prevent the raw coal from falling during the movement, and at the same time make the washed impurities fall through the small holes on the debris removal screen 123 to prevent the impurities from being pushed and re-attached to the surface of the raw coal. The washed impurities will fall into the debris collection bin 126 under the action of the debris carrying plate 125, and the impurities in the debris collection bin 126 need to be cleaned regularly by the staff.

[0044] Further, a gap is reserved between the screw conveyor 124 and the debris removal screen 123, and a raw coal output track 14 is fixedly arranged on the output side of the debris removal screen 123, and the input side of the raw coal output track 14 is arranged below the screw conveyor 124;

[0045] As a preferred embodiment, the gaps retained between the screw conveyor 124 and the debris removal screen 123 can prevent the raw coal from getting stuck during movement, thereby affecting the processing efficiency of the raw coal.

[0046] Further, the vibration screening component 4 includes:

[0047] A support frame 41, on which a vibrating screener 42 is fixedly mounted, and a coal block inlet 43 is fixedly provided at the input end of the vibrating screener 42, and the coal block inlet 43 is arranged just below the output end of the first conveying track 3;

[0048] The output end of the vibrating screener 42 is fixedly provided with a light material output belt 44, a lignite output belt 45 and a heavy material output belt 46, the output end of the lignite output belt 45 is provided with a second conveying track 5, and the output ends of the light material output belt 44 and the heavy material output belt 46 are connected to external processing equipment;

[0049] As a preferred embodiment, the density of lignite is relatively small, about 1.1 to 1.2 g / cm³. However, the geological composition of the rock wall is complex and diverse, and some sedimentary rocks with large porosity (such as loose sandstone or mudstone with a large number of pores), rocks rich in organic matter, specific minerals (certain light minerals or mineral combinations have low density), and rocks that have been weathered for a long time, etc., have a lower density than lignite. Through the vibration of the vibrating screener 42, other raw coals can be screened from lignite, thereby improving the purity of the lignite raw materials, thereby improving the flotation efficiency of lignite, and reducing cost losses.

[0050] Further, the slurry mixing assembly 8 comprises:

[0051] A fixed frame 81, on which a stirring driver 83 is fixedly arranged, and an output end of the stirring driver 83 is fixedly equipped with a stirrer 84, and the stirrer 84 is arranged inside a mixing tank 82, and the mixing tank 82 is fixedly assembled on the fixed frame 81;

[0052] A flotation agent tank 85 is fixedly mounted on the upper surface of the fixing frame 81, and an output end of the flotation agent tank 85 is connected to the mixing tank 82;

[0053] As a preferred embodiment, the flotation agent tank 85 contains well-configured flotation agents, which are used to improve the physical and chemical properties of the lignite surface, improve the hydrophobicity of coal particles and their adhesion to bubbles, so as to achieve effective separation of coal and ash. The cost includes a collector (acting on the solid-liquid interface, by improving the hydrophobicity of the coal surface, so that coal particles are more likely to adhere to bubbles and float with the bubbles), a frother (which can reduce the surface tension of the aqueous solution, so that the air filled in the water is easy to diffuse into bubbles, and stabilize these bubbles, so that the coal particles can more easily adhere to the bubbles and be carried away) and a regulator (used to adjust the pH of the slurry, the surface characteristics of the minerals, etc., to improve the flotation effect). The setting of the agitator 84 can make the crushed lignite, water and flotation agents fully mixed, enhance the flotation quality of the lignite, and improve the efficiency of lignite flotation deashing.

[0054] Further, the clean coal flotation assembly 9 comprises:

[0055] A flotation tank 91, a liquid collection circulation tank 92 is fixedly arranged on one side of the flotation tank 91 close to the raw coal cleaning component 1, a liquid adding pipe 94 is arranged on the other side of the flotation tank 91, and a plurality of bubble output pipes 96 are fixedly arranged on the side wall of the lower end of the flotation tank 91, and the bubble output pipes 96 are connected to the output end of the bubble generator 95, and the bubble generator 95 is fixedly arranged on one side of the flotation tank 91 close to the raw coal cleaning component 1;

[0056] Two groups of concentrate foam layer guide plates 97 are provided at the upper end of the flotation tank 91. An output port is provided on one side of the flotation tank 91 close to the liquid collection circulation tank 92. The output port is provided at the middle of one end of the concentrate foam layer guide plate 97. A clean coal collection box 93 is provided at the liquid collection circulation tank 92 corresponding to each output port.

[0057] A first spiral output track 98, the upper end of which is open and fixedly mounted on the lower surface of the flotation tank 91, and a second spiral output track 99 is fixedly mounted on the output end of the first spiral output track 98;

[0058] As a preferred embodiment, after the slurry adjusted to a suitable concentration enters the flotation tank 91, the bubble generator 95 therein will introduce a large number of bubbles into the flotation tank 91 through the bubble output pipe 96. The gangue minerals adsorbed by the collector in the flotation agent will float to the surface of the slurry through the action of the bubbles to form a foam product. The foam product will enter the corresponding clean coal collection box 93 under the guidance of the concentrate foam layer guide plate 97, and the clean coal collection box 93 is provided with a water outlet at the bottom, so that the water in the foam product can be drained into the liquid collection circulation tank 92, while the lignite is retained in the slurry due to the inhibitory effect in the flotation agent, and is finally collected and recovered by sedimentation through the first spiral output track 98 and the second spiral output track 99. In order to improve the deashing effect, a secondary flotation operation is sometimes required, that is, the slurry after the first flotation is added to the flotation machine again, and the above-mentioned flotation operation process is repeated, and the floated foam product is further processed, such as dehydration, drying, etc., to obtain a low-ash clean coal product.

[0059] Furthermore, a water delivery pump is provided at the other end of the liquid adding pipe 94, and a four-way port is provided at the output end of the water delivery pump. The other two interfaces of the four-way port are respectively connected to the water delivery equipment and the clean coal collection box 93;

[0060] As a preferred embodiment, the water delivery pump can re-introduce the water leaked from the clean coal collection box 93 into the flotation tank 91 for recycling, thereby saving production costs. The external water delivery equipment can provide sufficient water reserves to further ensure the flotation deashing efficiency.

[0061] During specific implementation, the following steps are included: the mined raw coal is introduced into the raw coal cleaning component 1 for preliminary cleaning treatment, and then introduced into the first crusher 2, the first crusher 2 will crush the preliminarily cleaned raw coal into coal blocks with uniform particle size, and then the lignite in the coal blocks is screened out by the vibration screening component 4, and then the screened lignite is transported to the second crusher 6 through the second conveying track 5, the second crusher 6 will crush the lignite, and then the lignite is pretreated in pairs to meet the feeding requirements of subsequent components, the crushed lignite is introduced into the slurry mixing component 8 through the third conveying track 7, the slurry mixing component 8 will mix the pretreated lignite, water and flotation agent to form a slurry, and the slurry is added with an appropriate amount of a collector, a frother, etc., these agents It can change the surface properties of coal particles and ash particles, making it easy for coal particles to adhere to bubbles. The slurry after adding drugs is sent to the clean coal flotation component 9 for flotation. In the clean coal flotation component 9, the slurry is stirred and aerated to form a large number of bubbles. The coal particles adhere to the bubbles and rise to the water surface with the bubbles to form a concentrate foam layer. The concentrate foam layer is scraped out and collected. In order to improve the deashing effect, it is sometimes necessary to perform a secondary flotation operation, that is, the slurry after the first flotation is added to the flotation machine again, and the above flotation operation process is repeated. The floated foam product is further processed, such as dehydration, drying, etc., to obtain a low-ash clean coal product. At the same time, the lignite is retained in the slurry due to the inhibitory effect in the flotation agent, and is finally collected and recovered by sedimentation through the first spiral output track 98 and the second spiral output track 99.

[0062] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lignite flotation deashing device, characterized in that The invention comprises a raw coal cleaning component (1), wherein the output end of the raw coal cleaning component (1) is provided with a first crusher (2), the output end of the first crusher (2) is provided with a first conveying track (3), the output end of the first conveying track (3) is provided with a vibration screening component (4), the output end of the vibration screening component (4) is provided with a second conveying track (5), the output end of the second conveying track (5) is provided with a second crusher (6), the output end of the second crusher (6) is provided with a third conveying track (7), the output end of the third conveying track (7) is fixedly provided with a slurry mixing component (8), and the output end of the slurry mixing component (8) is connected to a clean coal flotation component (9) via an output pump; The raw coal cleaning assembly (1) comprises a fixed support frame (11), a cleaning pool group (12) is fixedly mounted on the upper end of the fixed support frame (11), a raw coal conveying track (13) is fixedly arranged at one end of the cleaning pool group (12), and a raw coal output track (14) is fixedly arranged at the other end; A controller (15) is fixedly arranged on one side of the fixed support frame (11); A pressure booster (16) is fixedly arranged below the cleaning pool group (12); a water pipe (17) is fixedly arranged at the output end of the pressure booster (16); a plurality of groups of high-pressure nozzles (18) are fixedly arranged on the water pipe (17); each group of high-pressure nozzles (18) is arranged above the cleaning pool group (12); The vibration screening assembly (4) comprises: A support frame (41) on which a vibrating screen (42) is fixedly mounted, a coal block inlet (43) being fixedly provided at the input end of the vibrating screen (42), and the coal block inlet (43) being provided directly below the output end of the first conveying track (3); A light object output belt (44), a lignite output belt (45) and a heavy object output belt (46) are fixedly arranged at the output end of the vibrating screen (42); a second conveying track (5) is arranged at the output end of the lignite output belt (45); and external processing equipment is connected to the output ends of the light object output belt (44) and the heavy object output belt (46); The cleaning pool group (12) includes: A cleaning tank (121) is fixedly mounted inside thereof with a plurality of sets of fixing hoops (122), a debris removal screen (123) is coaxially fixedly mounted between the plurality of sets of fixing hoops (122), a screw conveyor (124) is arranged inside the debris removal screen (123), and the screw conveyor (124) is rotatably mounted on the side wall of the cleaning tank (121); A debris carrying plate (125) is fixedly mounted on the inner wall of the lower inner end of the cleaning tank (121), the debris carrying plate (125) is tilted, and a debris collecting drawer (126) is arranged on the tilted side of the debris carrying plate (125), and the debris collecting drawer (126) is slidably arranged on the inner wall at the bottom of the cleaning tank (121); A gap is retained between the screw conveyor (124) and the debris removal screen (123), and a raw coal output track (14) is fixedly arranged on the output side of the debris removal screen (123), and the input side of the raw coal output track (14) is arranged below the screw conveyor (124).

2. A lignite flotation and deashing device according to claim 1, characterized in that: The slurry mixing assembly (8) comprises: A fixed frame (81) on which a stirring driver (83) is fixedly arranged, an output end of the stirring driver (83) is fixedly equipped with a stirrer (84), the stirrer (84) is arranged inside a mixing tank (82), and the mixing tank (82) is fixedly assembled on the fixed frame (81); The flotation agent tank (85) is fixedly mounted on the upper surface of the fixing frame (81), and the output end of the flotation agent tank (85) is connected to the mixing tank (82).

3. A lignite flotation and deashing device according to claim 1, characterized in that: The clean coal flotation assembly (9) comprises: A flotation tank (91) having a liquid collection circulation tank (92) fixedly disposed on one side of the flotation tank (91) close to the raw coal cleaning component (1), a liquid adding pipe (94) disposed on the other side of the flotation tank (91), a plurality of groups of bubble output pipes (96) fixedly disposed on the side wall at the lower end of the flotation tank (91), the bubble output pipes (96) being connected to the output end of a bubble generator (95), and the bubble generator (95) being fixedly disposed on one side of the flotation tank (91) close to the raw coal cleaning component (1); Two groups of concentrate foam layer guide plates (97) are arranged at the upper end of the flotation tank (91); an output port is provided on one side of the flotation tank (91) close to the liquid collection circulation tank (92); the output port is arranged at the middle of one end of the concentrate foam layer guide plate (97); and a clean coal collection box (93) is arranged at the liquid collection circulation tank (92) corresponding to each output port; The first spiral output track (98) has an upper end which is open and is fixedly mounted on the lower surface of the flotation tank (91). The output end of the first spiral output track (98) is fixedly provided with a second spiral output track (99).

4. A lignite flotation and deashing device according to claim 3, characterized in that: A water delivery pump is provided at the other end of the liquid adding pipe (94), and a four-way port is provided at the output end of the water delivery pump. The other two interfaces of the four-way port are respectively connected to an external water delivery device and a clean coal collection box (93).

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