Coal gasification slag carbon-ash flotation separation device and method

Abstract

The invention discloses a coal gasification slag carbon-ash flotation separation device in the technical field of coal gasification fine slag treatment. The coal gasification slag carbon-ash flotation separation device comprises a flotation tank; a concentrate collecting part and a tailing collecting part are arranged on the flotation tank, the concentrate collecting part is located at the top of the flotation tank, and the tailing collecting part is located at the bottom of the flotation tank; an inclined carrier is arranged between the flotation tank and the tailing collecting part, a backflow groove and a plurality of turbulent flow channels are arranged in the inclined carrier, the backflow groove is communicated with the tailing collecting part, the backflow groove is communicated with all the turbulent flow channels to form a communicating vessel, and all the turbulent flow channels are communicated with the bottom of the flotation tank. Flow stopping pieces for stopping ore concentrate from sinking are arranged in the turbulent flow channels; the bottom of the flotation tank is further communicated with a circulating mechanism used for pumping ore pulp at the bottom of the flotation tank back to the top of the flotation tank. According to the method, the flotation process is optimized, so that the use amount of chemicals is reduced, and the treatment cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal gasification fine slag treatment, and in particular relates to a coal gasification slag carbon-ash flotation separation device and method. Background Art

[0002] In the field of coal processing and utilization, coal gasification technology, as an important energy conversion method, is of great significance for improving coal utilization efficiency and reducing environmental pollution. However, the treatment and utilization of ash produced during coal gasification has always been one of the key factors restricting the development of modern coal chemical industry. The efficient separation of coal gasification ash is not only related to its reduction and resource utilization, but also the premise of achieving high-value utilization, which has a far-reaching impact on promoting the sustainable development of the coal chemical industry.

[0003] The ash produced during the coal gasification process mainly includes coarse gasification slag and fine gasification slag. Since the coarse gasification slag has a relatively low carbon content, it can usually be recycled in large quantities and at low cost through physical methods such as gravity separation. However, the treatment of fine gasification slag is more complicated. Not only does the gasification fine slag have a high carbon content, sometimes even reaching more than 30%, but it also has a high proportion of fine particles, a complex pore structure of residual carbon, and a surface area of ​​up to 300-400 m² / g. This characteristic makes it difficult to achieve efficient separation of gasification fine slag under conventional flotation conditions, the flotation agent consumption is high, and the cost remains high, which has become a "bottleneck" problem restricting the resource utilization of coal gasification ash.

[0004] In view of the limitations of the existing technology in treating coal gasification fine slag, there is an urgent need for a separation device that can reduce treatment costs, improve separation efficiency, and realize resource and high-value utilization of coal gasification ash. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a coal gasification slag carbon-ash flotation separation device and method, which can overcome the limitations of the prior art and achieve efficient, low-cost and high-value utilization of coal gasification slag.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows: A coal gasification slag carbon-ash flotation separation device comprises a flotation tank; a concentrate collecting part and a tailings collecting part are arranged on the flotation tank, the concentrate collecting part is located at the top of the flotation tank, and the tailings collecting part is located at the bottom of the flotation tank; an inclined carrier is arranged between the flotation tank and the tailings collecting part, a reflux groove and a plurality of turbulent flow channels are arranged in the inclined carrier, the reflux groove is connected with the tailings collecting part, the reflux groove is connected with each turbulent flow channel to form a communicating vessel, the turbulent flow channels are respectively connected with the bottom of the flotation tank, and the turbulent flow channels are respectively provided with flow blocking parts for blocking the sinking of the concentrate; the bottom of the flotation tank is also connected with a circulation mechanism for pumping the ore pulp at the bottom of the flotation tank back to the top of the flotation tank.

[0007] The above scheme has the following beneficial effects: 1. Principle: After the slurry is mineralized by the external mineralization device, it is transported to the flotation tank. The mineralized bubbles formed after mineralization (mainly hydrophobic high-carbon materials, i.e., concentrate) move upward, while the unmineralized slurry (mainly high-ash materials, containing some fine-grained high-carbon materials) moves downward. This part of the unmineralized slurry is discharged into the tailings collection part after passing through the inclined carrier. When the slurry passes through the turbulent channel, turbulence will be generated in the turbulent channel under the action of the baffle. The fine particles in the slurry (i.e., fine-grained high-carbon materials) will flow back to the flotation tank under the synergistic effect of the baffle and turbulence, and will be pumped back to the top of the flotation tank through the circulation mechanism, while impurities with higher density such as high-ash materials will enter the reflux tank along the turbulent channel until they enter the tailings collection part for collection and treatment.

[0008] Under conventional flotation conditions, the separation efficiency of coal gasification fine slag is often not high, and a large amount of flotation reagents are required to enhance the separation effect. The present invention reduces the amount of reagents used and reduces the processing cost by optimizing the flotation process. The design of the turbulent flow channel and the flow blocking member makes it easier to capture and re-float fine particles of high carbon materials, thereby reducing the waste of reagents.

[0009] 2. This solution achieves effective recovery of fine high-carbon materials through the ingenious design of turbulent channels and flow-blocking parts. Under the action of turbulence, these fine particles that were originally easily lost with the tailings are redirected back to the flotation tank to participate in re-floatation, thereby significantly improving the recovery rate of high-carbon materials.

[0010] 3. This scheme realizes multiple circulations of fine particles by utilizing a circulation mechanism, and can dynamically adjust the size of the slurry circulation volume according to the amount of fine particles in the material. This adaptability enables the device to process coal gasification slag of different compositions and properties, and has broad application prospects.

[0011] 4. This solution, by adding circulating slurry from the top of the flotation tank, not only achieves multiple circulations of fine particles, but also makes the slurry in the static separation state at the top of the flotation tank moderately turbulent. This turbulent state helps to separate the unreliable particles such as high-ash fine mud from the bubbles, further improving the quality of the flotation concentrate.

[0012] Furthermore, the flow blocking member is a barb.

[0013] Beneficial effect: The flow-blocking parts with barbed structures can more effectively generate local turbulence when the slurry flows through. This turbulence not only enhances the turbulence of the slurry, but also promotes the collision and adhesion between fine particles and bubbles, thereby improving the flotation efficiency.

[0014] Furthermore, the angle between the baffle and the inclined carrier is .

[0015] Beneficial effect: When the angle between the baffle and the inclined carrier is within this range, the pulp can be more effectively guided to generate turbulence. Turbulence helps the fine particles and bubbles to fully contact and collide, thereby improving the flotation efficiency.

[0016] Further, the length of the baffle is equal to the width of the turbulent flow channel. .

[0017] Beneficial effect: When the ratio of the length of the flow blocking member to the width of the turbulent flow channel is within this range, a moderate turbulent flow intensity can be generated. This turbulence is sufficient to allow fine particles to fully contact and collide with bubbles, while not affecting the normal flow of the slurry in the turbulent flow channel.

[0018] Furthermore, the concentrate collecting part comprises an annular carrier; the annular carrier is sleeved on the outer side of the top of the flotation tank, an annular groove is arranged on the annular carrier, and the annular groove is communicated with the top of the flotation tank.

[0019] Beneficial effect: When the slurry level in the flotation tank gradually rises and is flush with the annular groove, the foam on the top of the slurry will naturally overflow the flotation tank and enter the annular groove. This process does not require additional power or equipment, and realizes efficient and automatic collection of foam.

[0020] Furthermore, the bottom of the annular groove is inclined, and a discharge pipe is connected to the downwardly inclined side of the annular groove.

[0021] Beneficial effect: Since the downwardly inclined side of the annular groove is connected to a discharge pipe, the foam can flow into the discharge pipe more smoothly under the guidance of gravity and the inclined surface, and then be discharged to the subsequent processing process.

[0022] Furthermore, a suspension beam is provided on the top of the flotation tank; a stirring mechanism is provided on the suspension beam, and the stirring mechanism is used to stir the slurry in the flotation tank; a scraping assembly is provided between the suspension beam and the flotation tank for scraping the foam on the top of the flotation tank to the concentrate collection part.

[0023] Beneficial effects: The stirring mechanism stirs the pulp in the flotation tank, which helps to evenly mix the pulp and evenly distribute the bubbles. This ensures sufficient contact and collision between fine particles and bubbles during the flotation process, thereby improving the flotation efficiency.

[0024] The froth scraping assembly can timely and effectively scrape the froth generated during the flotation process from the top of the flotation tank and transport it to the concentrate collection part, thereby improving the concentrate collection efficiency.

[0025] Furthermore, the stirring mechanism includes a stirring shaft and a power assembly; the power assembly is used to drive the stirring shaft to rotate.

[0026] Beneficial effects: As the core component of the stirring mechanism, the power assembly can stably and efficiently drive the stirring shaft to rotate. The stirring force generated by this rotation can ensure that the slurry is fully mixed and evenly distributed in the flotation tank.

[0027] Furthermore, the foam scraping assembly includes a rotating shaft, a groove wheel carrier and at least one scraper; the two ends of the rotating shaft are respectively rotatably connected to the suspension beam and the flotation tank, the groove wheel carrier is coaxially fixedly connected to the rotating shaft, a plurality of shifting grooves are provided on the groove wheel carrier, the scraper is fixedly connected to one side of the rotating shaft, and the bottom of the scraper is slidably matched with the top of the flotation tank; at least one shifting rod is also provided on the stirring shaft, and a pin is provided on the shifting rod. When the shifting rod rotates, the pin is slidably matched with each shifting groove in turn.

[0028] Beneficial effect: When the agitator shaft rotates, the lever drives the latch to slide with each slot in turn, thereby driving the groove wheel carrier and the rotating shaft to rotate, and then driving the scraper to rotate, scraping the foam in the flotation tank to the annular groove for collection. The scraper can scrape the foam evenly and continuously during the rotation process. This design avoids the accumulation and retention of foam in the annular groove and improves the collection efficiency of foam.

[0029] Furthermore, a base is provided at the bottom of each spoiler, and the base is rotatably connected to the inclined carrier; and a tail wing is provided on the back of each spoiler.

[0030] Beneficial effect: Through the rotational connection between the base and the inclined carrier, the baffle can be flexibly adjusted according to the turbulent direction of the slurry in the turbulent channel.

[0031] The tail wing design enables the spoiler to respond intelligently based on the turbulence direction of the current area. When the slurry turbulence occurs in the turbulence channel, the tail wing will feel the force of the turbulence and drive the spoiler to adjust its position, thereby ensuring that the spoiler is always facing the turbulence direction.

[0032] Since the baffle can face the turbulent direction, the flow path length of the fine particles in the turbulent channel can be shortened. In particular, when the fine particles hit the baffle from the front, their return path will be more direct and efficient than hitting the baffle from the side. This design helps to increase the speed of fine particles returning to the flotation tank, further improving the flotation efficiency.

[0033] At the same time, when coarser particles collide with the slurry, the baffle, as a movable structure, can play a role of buffering and resisting, thereby reducing the loss of the baffle caused by the impact of coarse particles and extending its service life.

[0034] Furthermore, a plurality of nozzles are arranged on the annular carrier, and the nozzles are used to clean the scraping foam side of the scraper respectively.

[0035] Beneficial effect: The nozzle cleans the scraping side of the scraper in time to remove the residue attached to the scraper, ensuring that the scraper is in a clean state before each scraping. A clean scraper can scrape foam more effectively, reduce the situation of incomplete scraping caused by residue, and thus improve the scraping efficiency.

[0036] And cleaning the scraper can reduce scraper wear and corrosion caused by residue accumulation and extend the service life of the scraper.

[0037] While the nozzle is flushing the scraper, as the scraper rotates, part of the water flow will splash from the surface of the scraper to the top of the flotation tank. The concentrate will often carry some tailings during the floating process, but because these tailings are weakly attached to the bubbles, the splashing water will rinse this part of the slurry when entering the flotation tank, and these tailings will be washed back into the slurry, thereby purifying the flotation concentrate.

[0038] Furthermore, a fence assembly is also arranged on the suspension beam.

[0039] Beneficial effects: The fence assembly can prevent foreign objects (such as tools, parts, etc.) from accidentally falling into the flotation tank and causing damage to key equipment such as the stirring mechanism and scraper assembly.

[0040] A method for flotation separation of coal gasification slag carbon-ash comprises the following steps: After pretreatment, the coal gasification slag is formed into a pulp suitable for flotation; Transporting the slurry to an external mineralization device for mineralization treatment; The mineralized slurry is fed into the flotation tank; The slurry that needs to be discharged into the tailings collection section is separated and processed using the turbulent flow channel and the baffle, so that the fine particles in this part of the slurry are retained and pumped back to the top of the flotation tank through the circulation mechanism for re-floatation; the rest of the slurry continues to flow along the turbulent flow channel until it is collected and processed by the tailings collection section. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of the coal gasification slag carbon-ash flotation separation device of the present invention.

[0042] Figure 2 for Figure 1 Front view of .

[0043] Figure 3 for Figure 1 Side view of.

[0044] Figure 4 for Figure 2 Cross-section view at AA in the middle.

[0045] Figure 5 for Figure 4 Cross-section view at BB.

[0046] Figure 6 for Figure 5 A partial enlarged schematic diagram of point M in the middle.

[0047] Figure 7 for Figure 5 Axonometric diagram of the center sheave carrier.

[0048] Figure 8 for Figure 6 A partial enlarged schematic diagram of point O in the middle.

[0049] The figure marks in the drawings of the specification include: 1, flotation tank; 2, concentrate collection part; 3, tailings collection part; 4, inclined carrier; 5, circulation pipe; 6, power assembly; 7, driven wheel; 8, feed pipe; 9, discharge pipe; 10, fence assembly; 101, suspension beam; 102, rotating shaft; 103, groove wheel carrier; 104, scraper; 105, pulley; 106, lever; 107, latch; 201, nozzle; 202, annular groove; 401, turbulent channel; 402, baffle; 403, reflux groove; 404, tail wing; 405, base; 501, circulation pump; 601, stirring shaft; 602, stirring blade. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0051] In the description of the present invention, it is to be understood that the terms “longitudinal”, “lateral”, “vertical”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0053] The following is further described in detail through specific implementation methods: Embodiment 1 is basically as attached Figure 1-Figure 8 As shown: A coal gasification slag carbon-ash flotation separation device mainly includes a flotation tank 1, which is one of the links in the whole process. The flotation tank 1 is connected with a feed pipe 8; the flotation tank 1 is connected with a concentrate collecting part 2 and a tailings collecting part 3, the concentrate collecting part 2 is located at the top of the flotation tank 1, and the tailings collecting part 3 is located at the bottom of the flotation tank 1. Specifically, the concentrate collecting part 2 includes an annular carrier; the annular carrier is sleeved on the outer side of the top of the flotation tank 1 by welding and fixing, and an annular groove 202 is opened in the annular carrier, which is similar to the appearance of the annular carrier, and the inner side of the annular groove 202 is connected with the top of the flotation tank 1.

[0054] Preferably, the bottom of the annular groove 202 is inclined, the side of the annular groove 202 close to the feed pipe 8 is lower than the other side, and the downwardly inclined side of the annular groove 202 is connected to the discharge pipe 9 (the discharge pipe 9 is connected to the concentrator in the subsequent processing process (not shown in the figure)). Preferably, a plurality of nozzles 201 are also installed on the annular carrier, and the nozzles 201 are circumferentially installed on the outer side wall of the annular groove 202 for subsequent cleaning.

[0055] An inclined carrier 4 is arranged between the flotation tank 1 and the tailings collecting part 3. In this embodiment, the inclined carrier 4 is an inclined plate. A reflux groove 403 and a plurality of turbulent channels 401 are provided in the inclined carrier 4. The reflux groove 403 is connected to the tailings collecting part 3. The reflux groove 403 is respectively connected to each turbulent channel 401 to form a communicating vessel. The turbulent channels 401 are respectively connected to the bottom of the flotation tank 1. Preferably, in this embodiment, each turbulent channel 401 is arranged at the same interval distance. A baffle 402 for blocking the sinking of the concentrate is provided in the turbulent channel 401. Preferably, in this embodiment, the baffle 402 is a barb. In other embodiments, the baffle 402 may be other structures capable of generating turbulence. The angle between the barb and the inclined carrier 4 is 15° to 60°, and the length of the barb is 1⁄4 to 1⁄2 of the width of the turbulent channel 401.

[0056] The bottom of the flotation tank 1 is also connected to a circulation mechanism for pumping the slurry at the bottom of the flotation tank 1 back to the top of the flotation tank 1. Figure 5 As shown, the circulation mechanism includes a circulation pipe 5 , in which a circulation pump 501 is built. The circulation pump 501 is used to pump the slurry at the bottom of the flotation tank 1 back to the top of the flotation tank 1 .

[0057] Preferably, a cantilever beam 101 is also provided on the top of the flotation tank 1. In this embodiment, the cantilever beam 101 is a circular structure. A stirring mechanism is provided in the cantilever beam 101, and the stirring mechanism is used to stir the slurry in the flotation tank 1. In this embodiment, the stirring mechanism includes a stirring shaft 601 and a power assembly 6. The power assembly 6 is used to drive the stirring shaft 601 to rotate. Specifically, a stirring blade 602 is installed on the stirring shaft 601, and the bottom of the stirring shaft 601 is rotatably connected to the bottom of the flotation tank 1. The power assembly 6 is located on one side of the stirring shaft 601. The power assembly 6 includes a long-axis servo motor, a driving wheel, a driven wheel 7 and a crawler. The driving wheel and the driven wheel 7 are linked by the crawler. The long-axis servo motor is fixed to the top of the cantilever beam 101 by bolts, and the output shaft of the long-axis servo motor is axially welded and fixed to the driving wheel, and the driven wheel 7 is axially welded and fixed to the stirring shaft 601, so that the long-axis servo motor can drive the stirring shaft 601 to rotate. Preferably, a fence assembly 10 is also provided on the suspension beam 101 . The fence assembly 10 mainly includes a mesh plate and a fence. Its main function is to provide an activity area for the staff and prevent other objects from falling into the equipment and affecting the normal operation of the flotation tank 1 .

[0058] A scraper assembly is provided between the suspension beam 101 and the flotation tank 1 for scraping the foam on the top of the flotation tank 1 to the concentrate collection part 2. Specifically, the scraper assembly includes a rotating shaft 102, a sheave carrier 103 and at least one scraper 104. In this embodiment, four groups of scraper assemblies are circumferentially arranged on the top of the flotation tank 1; Figure 7 As shown, the top and bottom of the rotating shaft 102 are rotatably connected to the suspension beam 101 and the flotation tank 1 respectively, the sheave carrier 103 is coaxially welded and fixed to the rotating shaft 102, and four groups of shifting grooves 105 are opened on the sheave carrier 103. The scraper 104 is welded and fixed to one side of the rotating shaft 102, and the bottom of the scraper 104 is slidably matched with the top of the flotation tank 1; Figure 4 As shown, at least one lever 106 is welded and fixed to one side of the stirring shaft 601 , and a latch 107 is welded and fixed to the lever 106 . When the lever 106 rotates, the latch 107 slides and cooperates with each of the grooves 105 in sequence.

[0059] The specific implementation process is as follows: The coal gasification slag is pre-treated to form a slurry suitable for flotation; for example, the coal gasification slag is finely crushed and screened to remove large impurities and adjust the particle size distribution, and then further ground to further refine the particles and increase the consistency of the particle surface properties.

[0060] The slurry is transported to an external mineralization device for mineralization treatment; for example, the pre-treated slurry is stably transported to a specially designed external mineralization device through an efficient transportation system, such as pumping, and the flotation performance of specific mineral particles is enhanced by adding appropriate amounts of chemical reagents (such as collectors, frothers, etc.), creating favorable conditions for subsequent flotation operations. (The prior art will not be described in detail here) The mineralized slurry is fed into the flotation tank 1 through the feed pipe 8 at a pressure of 0.02 MPa.

[0061] Start the long-axis servo motor and use the stirring shaft 601 to stir the slurry. In the flotation tank 1, the mineralized bubbles (mainly hydrophobic high-carbon materials, i.e., concentrate) will move to the top of the flotation tank 1, while the unmineralized slurry (mainly high-ash materials, containing some fine-grained high-carbon materials) will move to the bottom of the flotation tank 1.

[0062] When the liquid level of the slurry reaches the bottom of the scraper 104, the scraper 104 rotates intermittently under the drive of the stirring shaft 601, scraping the foam on the liquid surface into the annular groove 202, and at the same time using the nozzle 201 to clean the surface of the scraper 104 to ensure that the surface of the scraper 104 is clean.

[0063] The unmineralized slurry will be discharged into the tailings collection part 3 after passing through the inclined carrier 4 .

[0064] When the slurry flows through the turbulent flow channel 401 and impacts the flow blocker 402 (i.e., barbs), local turbulence is generated, and fine particles (i.e., fine high-carbon materials, the same below) flow back or are retained to the bottom of the flotation tank 1 under the synergistic effect of the turbulent flow and the flow blocker 402. Then, the slurry retained at the bottom of the flotation tank 1 is pumped back to the top of the flotation tank 1 by the circulation pump 501 for secondary flotation.

[0065] The following provides two sets of experimental data of this device: Fine slag separation experiment of gasification slag in area A: The proportion of particles with a diameter less than 0.074 mm is 59.80%, and the slurry circulation volume is 40%; The flotation results of this device are: Agent: The amount of diesel collector is 3500 g (diesel) / t (coal gasification slag), and the amount of octanol foaming agent is 2000 g (octanol) / t (coal gasification slag) sample Mass / g Ash As is 201.5 72.03 Concentrate 50.82 21.35 Tailings 152.99 88.90 The flotation results of conventional flotation devices are: Reagents: The amount of diesel collector is 10000 g (diesel) / t (coal gasification slag), and the amount of octanol foaming agent is 2000 g (octanol) / t (coal gasification slag) sample Mass / g Ash As is 199.5 72.03 Concentrate 47.29 22.84 Tailings 150.30 87.82 Fine slag separation experiment of gasification slag in area B: The proportion of particles with a diameter less than 0.074 mm is 70.80%, and the slurry circulation volume is 60%; The flotation results of this device are: Agent: The amount of diesel for collector is 2500 g (diesel) / t (coal gasification slag), the amount of octanol for foaming agent is 2500 g (octanol) / t (coal gasification slag) sample Mass / g Ash As is 202.75 60.27 Concentrate 38.82 19.31 Tailings 160.39 70.79 The flotation results of conventional flotation devices are: Agent: The amount of diesel collector is 8000 g (diesel) / t (coal gasification slag), and the amount of octanol foaming agent is 2500 g (octanol) / t (coal gasification slag) sample Mass / g Ash As is 200.5 60.27 Concentrate 30.54 25.33 Tailings 172.81 66.13 In summary, in both experiments, the proportion of particles with a diameter of less than 0.074 mm in the gasification slag fines was high, 59.80% and 70.80% respectively. This shows that the fine-grained content of the gasification slag fines is high, which may have a certain impact on the flotation process. Despite the high fine-grained content, the device achieved good flotation effects in both experiments, indicating that the device has good adaptability to fine-grained gasification slag fines.

[0066] In both experiments, the amount of collector diesel used when using the device was lower than that of the conventional flotation device. This shows that the device has advantages in reducing reagent consumption, which helps to reduce costs and reduce environmental pollution.

[0067] When the present device was used, the concentrate ash content in both experiments was lower than that of the conventional flotation device, indicating that the present device performed better in reducing the concentrate ash content.

[0068] At the same time, the ash content of the tailings of this device is higher than that of the conventional flotation device, which shows that the quality of the concentrate of this device is better than that of the conventional flotation device.

[0069] In summary, the device has significant advantages in reducing reagent consumption and improving flotation effect.

[0070] The difference between the second embodiment and the first embodiment is that the Figure 6 and attached Figure 8 As shown, a base 405 is welded and fixed to the bottom of the barb, and the base 405 is rotatably connected to the tilting carrier 4. Specifically, each base 405 is equipped with a groove that allows it to rotate within a certain angle, and the base 405 can rotate freely in the groove; a tail wing 404 is provided on the back of the barb, and the tail wing 404 and the barb are of integrated design.

[0071] The specific implementation process is as follows: When the slurry in the turbulent flow channel 401 impacts the barbs in different directions, the barbs will be adaptively adjusted according to the turbulent direction to maintain the best turbulent effect, so that the fine particles in the slurry can flow back to the bottom of the flotation tank 1 in the shortest ejection path. At the same time, since the barbs can automatically adjust their posture to adapt to the turbulence, the barb loss caused by uneven turbulence can be reduced, thereby increasing the service life of the barbs.

[0072] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A coal gasification slag carbon-ash flotation separation device, comprising a flotation tank (1); the flotation tank (1) is connected to a concentrate collecting part (2) and a tailings collecting part (3), the concentrate collecting part (2) is located at the top of the flotation tank (1), and the tailings collecting part (3) is located at the bottom of the flotation tank (1); the characteristics are: An inclined carrier (4) is arranged between the flotation tank (1) and the tailings collection part (3), a reflux groove (403) and a plurality of turbulent flow channels (401) are arranged in the inclined carrier (4), the reflux groove (403) is connected to the tailings collection part (3), the reflux groove (403) is respectively connected to each turbulent flow channel (401) to form a communicating vessel, the turbulent flow channels (401) are respectively connected to the bottom of the flotation tank (1), and a flow blocking member (402) for blocking the sinking of concentrate is arranged in the turbulent flow channels (401); the bottom of the flotation tank (1) is also connected to a circulation mechanism for pumping the ore pulp at the bottom of the flotation tank (1) back to the top of the flotation tank (1).

2. The coal gasification slag carbon-ash flotation separation device according to claim 1, characterized in that: The flow blocking member (402) is a barb.

3. The coal gasification slag carbon-ash flotation separation device according to claim 2, characterized in that: The angle between the baffle (402) and the inclined carrier (4) is .

4. The coal gasification slag carbon-ash flotation separation device according to claim 3, characterized in that: The length of the flow blocking member (402) is equal to the width of the turbulent flow channel (401). .

5. The coal gasification slag carbon-ash flotation separation device according to claim 4, characterized in that: The concentrate collecting part (2) comprises an annular carrier; the annular carrier is sleeved on the outside of the top of the flotation tank (1); an annular groove (202) is formed in the annular carrier; the annular groove (202) is connected to the top of the flotation tank (1).

6. The coal gasification slag carbon-ash flotation separation device according to claim 5, characterized in that: The bottom of the annular groove (202) is inclined, and a discharge pipe (9) is connected to the downwardly inclined side of the annular groove (202).

7. The coal gasification slag carbon-ash flotation separation device according to claim 6, characterized in that: A suspension beam (101) is arranged on the top of the flotation tank (1); a stirring mechanism is arranged inside the suspension beam (101), and the stirring mechanism is used to stir the ore pulp in the flotation tank (1); and a froth scraping assembly is arranged between the suspension beam (101) and the flotation tank (1), and is used to scrape the froth on the top of the flotation tank (1) to the concentrate collection part (2).

8. The coal gasification slag carbon-ash flotation separation device according to claim 7, characterized in that: The stirring mechanism comprises a stirring shaft (601) and a power assembly (6); the power assembly (6) is used to drive the stirring shaft (601) to rotate.

9. The coal gasification slag carbon-ash flotation separation device according to claim 8, characterized in that: The foam scraping assembly comprises a rotating shaft (102), a groove wheel carrier (103) and at least one scraper (104); the two ends of the rotating shaft (102) are rotatably connected to the suspension beam (101) and the flotation tank (1), respectively; the groove wheel carrier (103) is coaxially fixedly connected to the rotating shaft (102); a plurality of shifting grooves (105) are provided on the groove wheel carrier (103); the scraper (104) is fixedly connected to one side of the rotating shaft (102); the bottom of the scraper (104) is slidably matched with the top of the flotation tank (1); at least one shifting rod (106) is further provided on the stirring shaft (601); the shifting rod (106) is provided with a latch (107); when the shifting rod (106) rotates, the latch (107) is slidably matched with each shifting groove (105) in sequence.

10. The coal gasification slag carbon-ash flotation separation device according to claim 9, characterized in that: The bottom of each flow-blocking member (402) is provided with a base (405), and the base (405) is rotatably connected to the inclined carrier (4); and the back of each flow-blocking member (402) is provided with a tail wing (404).

11. The coal gasification slag carbon-ash flotation separation device according to claim 10, characterized in that: A plurality of nozzles (201) are also provided on the annular carrier, and the nozzles (201) are used to clean the foam scraping side of the scraper (104) respectively.

12. The coal gasification slag carbon-ash flotation separation device according to claim 11, characterized in that: A fence assembly (10) is also provided on the suspension beam (101).

13. A method for flotation separation of coal gasification slag carbon and ash, based on the coal gasification slag carbon and ash flotation separation device according to any one of claims 1 to 12, characterized in that: The following steps are involved: After pretreatment, the coal gasification slag is formed into a pulp suitable for flotation; Transporting the slurry to an external mineralization device for mineralization treatment; The mineralized slurry is fed into a flotation tank (1); The ore pulp to be discharged into the tailings collection section (3) is separated and processed using the turbulent flow channel (401) and the flow blocking member (402), so that the fine particles in this part of the ore pulp are retained and pumped back to the top of the flotation tank (1) through the circulation mechanism for re-floatation; the rest of the ore pulp continues to flow along the turbulent flow channel (401) until it is collected and processed by the tailings collection section (3).

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