A carbon-ash flotation separation device and method for coal gasification slag

Abstract

This invention discloses a coal gasification slag carbon-ash flotation separation device in the field of coal gasification fine slag treatment technology, comprising a flotation tank; the flotation tank is equipped with a concentrate collection section and a tailings collection section, the concentrate collection section being located at the top of the flotation tank and the tailings collection section being located at the bottom of the flotation tank; an inclined carrier is provided between the flotation tank and the tailings collection section, the inclined carrier being equipped with a reflux trough and several turbulent flow channels, the reflux trough being connected to the tailings collection section, and the reflux trough being connected to each of the turbulent flow channels to form a communicating vessel, each of the turbulent flow channels being connected to the bottom of the flotation tank, and each of the turbulent flow channels being equipped with a flow-blocking element for impeding the settling of concentrate; the bottom of the flotation tank is also connected to a circulation mechanism for pumping the slurry at the bottom of the flotation tank back to the top of the flotation tank. This invention optimizes the flotation process, reduces the amount of reagents used, and lowers the processing cost.

Description

Technical Field

[0001] This invention belongs to the field of coal gasification fine slag treatment technology, specifically a coal gasification slag carbon-ash flotation separation device and method. Background Technology

[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 and slag generated 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 and slag is not only related to its volume reduction and resource utilization, but also a prerequisite for achieving high-value utilization, which has a profound impact on promoting the sustainable development of the coal chemical industry.

[0003] The ash generated during coal gasification mainly includes coarse gasification ash and fine gasification ash. Coarse gasification ash, due to its relatively low carbon content, can usually be recovered in large quantities and at low cost through physical methods such as gravity separation. However, the treatment of fine gasification ash is more complex. Fine gasification ash not only has a high carbon content, sometimes exceeding 30%, but also a high proportion of fine particles, a complex residual carbon pore structure, and a surface area as high as 300-400 m² / g. These characteristics make it difficult to achieve efficient separation of fine gasification ash under conventional flotation conditions, resulting in high flotation reagent consumption and high costs, becoming a bottleneck problem restricting the resource utilization of coal gasification ash.

[0004] Given the limitations of existing technologies in processing fine coal gasification slag, there is an urgent need for a separation device that can reduce processing costs, improve separation efficiency, and realize the resource utilization and high-value utilization of coal gasification ash slag. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a carbon-ash flotation separation device and method for coal gasification slag, which can overcome the limitations of existing technologies and achieve efficient, low-cost, and high-value utilization of coal gasification slag.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A coal gasification slag carbon-ash flotation separation device includes a flotation tank; the flotation tank is equipped with a concentrate collection section and a tailings collection section, the concentrate collection section being located at the top of the flotation tank and the tailings collection section being located at the bottom of the flotation tank; an inclined carrier is provided between the flotation tank and the tailings collection section, the inclined carrier is equipped with a reflux trough and several turbulent flow channels, the reflux trough is connected to the tailings collection section, the reflux trough is connected to each of the turbulent flow channels to form a communicating vessel, the turbulent flow channels are all connected to the bottom of the flotation tank, and each turbulent flow channel is equipped with a flow-blocking element to prevent the concentrate from settling; the bottom of the flotation tank is also connected to a circulation mechanism for pumping the slurry from the bottom of the flotation tank back to the top of the flotation tank.

[0008] The above approach has the following beneficial effects:

[0009] 1. Principle: After the slurry is mineralized by an 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-particle high-carbon materials) moves downward. This unmineralized slurry is discharged into the tailings collection section after passing through an inclined carrier. When the slurry passes through the turbulent channel, turbulence is generated in the turbulent channel under the action of the flow-blocking element. The fine particles in the slurry (i.e., fine-particle high-carbon materials) will flow back to the flotation tank under the combined action of the flow-blocking element and the turbulence. They will be pumped back to the top of the flotation tank by the circulation mechanism, while high-density impurities such as high-ash materials will enter the return tank along the turbulent channel until they enter the tailings collection section for collection and treatment.

[0010] Under conventional flotation conditions, the separation efficiency of fine coal gasification slag is often low, requiring a large amount of flotation reagents to enhance the separation effect. This invention, however, optimizes the flotation process, reducing reagent usage and lowering processing costs. The design of the turbulent channel and flow-blocking components makes it easier for fine, high-carbon particles to be captured and refloted, thereby reducing reagent waste.

[0011] 2. This solution achieves effective recovery of fine-grained high-carbon materials through the ingenious design of turbulent channels and flow-blocking components. Under the action of turbulence, these fine particles, which would otherwise easily be lost with the tailings, are guided back into the flotation tank to participate in secondary flotation, thereby significantly improving the recovery rate of high-carbon materials.

[0012] 3. This scheme utilizes a circulation mechanism to achieve multiple circulations of fine particles, and the circulation volume of the slurry can be dynamically adjusted according to the amount of fine particles in the material. This adaptability enables the device to process coal gasification slag with different compositions and properties, and has broad application prospects.

[0013] 4. This scheme, by adding circulating slurry from the top of the flotation tank, not only achieves multiple circulations of fine particles but also moderately disturbs the slurry that is in a static separation state at the top of the flotation tank. This disturbance helps to separate unstable particles such as high-ash fine mud from air bubbles, further improving the quality of the flotation concentrate.

[0014] Furthermore, the flow-blocking element is a barb.

[0015] Beneficial effects: The barbed structure of the flow-blocking element can more effectively generate local turbulence when the slurry flows through it. This turbulence not only enhances the turbulence of the slurry but also promotes the collision and adhesion between fine particles and bubbles, thereby improving flotation efficiency.

[0016] Furthermore, the angle between the flow-blocking component and the inclined carrier is... .

[0017] Beneficial effects: When the angle between the flow-blocking element and the inclined carrier is within this range, it can more effectively guide the slurry to generate turbulence. Turbulence facilitates sufficient contact and collision between fine particles and bubbles, thereby improving flotation efficiency.

[0018] Furthermore, the length of the flow-blocking component is equal to the width of the turbulent flow channel. .

[0019] Beneficial effects: When the ratio of the length of the flow-blocking element to the width of the turbulent channel is within this range, a moderate turbulence intensity can be generated. This turbulence is sufficient to allow fine particles and bubbles to fully contact and collide, without affecting the normal flow of the slurry within the turbulent channel.

[0020] Furthermore, the concentrate collection section includes an annular carrier; the annular carrier is fitted onto the top outside of the flotation tank, and an annular groove is provided on the annular carrier, which communicates with the top of the flotation tank.

[0021] Beneficial effects: As the slurry level in the flotation tank gradually rises and becomes level with the annular trough, the foam at the top of the slurry will naturally overflow from the flotation tank and enter the annular trough. This process requires no additional power or equipment, achieving efficient and automatic foam collection.

[0022] Furthermore, the bottom of the annular trough is inclined, and a discharge pipe is connected to the downward inclined side of the annular trough.

[0023] Beneficial effects: Since the discharge pipe is connected to the downward-sloping side of the annular trough, the foam can flow more smoothly into the discharge pipe under the guidance of gravity and the inclined surface, and then be discharged to the subsequent processing.

[0024] Furthermore, a suspension beam is provided at the top of the flotation tank; an agitation mechanism is provided on the suspension beam to agitate the slurry inside the flotation tank; and a skimmer assembly is provided between the suspension beam and the flotation tank to scrape the foam at the top of the flotation tank to the concentrate collection section.

[0025] Beneficial effects: The stirring mechanism agitates the slurry within the flotation tank, contributing to uniform mixing and bubble distribution. This ensures sufficient contact and collision between fine particles and bubbles during flotation, thereby improving flotation efficiency.

[0026] The froth removal assembly can effectively and promptly remove the foam generated during the flotation process from the top of the flotation tank and transport it to the concentrate collection section, thereby improving the concentrate collection efficiency.

[0027] Furthermore, the stirring mechanism includes a stirring shaft and a power assembly; the power assembly is used to drive the stirring shaft to rotate.

[0028] Beneficial effects: As the core component of the agitation mechanism, the power unit can stably and efficiently drive the agitator shaft to rotate. The agitation force generated by this rotation ensures that the slurry is fully mixed and evenly distributed within the flotation tank.

[0029] Furthermore, the frothing assembly includes a rotating shaft, a grooved wheel carrier, and at least one scraper. The two ends of the rotating shaft are rotatably connected to the suspension beam and the flotation tank, respectively. The grooved wheel carrier is coaxially and fixedly connected to the rotating shaft. Several grooves are provided on the grooved wheel carrier. The scraper is fixedly connected to one side of the rotating shaft, and the bottom of the scraper is slidably engaged with the top of the flotation tank. At least one lever is also provided on the stirring shaft. A pin is provided on the lever. When the lever rotates, the pin slides into each groove in sequence.

[0030] Beneficial effects: When the stirring shaft rotates, the lever drives the pin to slide and engage with each slot in sequence, thereby driving the wheel carrier and the shaft to rotate, which in turn drives the scraper to rotate, scraping the foam in the flotation tank into the annular groove for collection. The scraper can evenly and continuously remove foam during rotation. This design avoids foam accumulation and retention in the annular groove, improving foam collection efficiency.

[0031] Furthermore, each flow-blocking component has a base at its bottom, which is rotatably connected to the inclined carrier; and each flow-blocking component has a tail fin on its back.

[0032] Beneficial effects: Through the rotational connection between the base and the inclined carrier, the flow obstruction component can be flexibly adjusted according to the turbulent flow direction of the slurry in the turbulent channel.

[0033] The tail fin design allows the flow-blocking component to intelligently respond based on the turbulence direction of the current area. When the slurry becomes turbulent within the turbulence channel, the tail fin senses the force of the turbulence and adjusts the orientation of the flow-blocking component, ensuring that it always faces the turbulence direction.

[0034] Because the flow-blocking element is aligned directly with the turbulent flow direction, the flow path length of fine particles within the turbulent channel is shortened. In particular, when fine particles impact the flow-blocking element head-on, their return path is more direct and efficient compared to impacting it from the side. This design helps increase the speed at which fine particles return to the flotation tank, further improving flotation efficiency.

[0035] Meanwhile, when coarser particles impact the flow-blocking component along with the slurry, the component, being a movable structure, acts as a buffer, reducing wear and tear on the component caused by the impact of coarse particles and extending its service life.

[0036] Furthermore, the annular carrier is also equipped with several nozzles, which are used to clean the side of the scraper that is scraped by the scraper.

[0037] Beneficial effects: The spray nozzle cleans the squeegee side promptly, removing residue and ensuring the squeegee is clean before each use. A clean squeegee can more effectively scrape foam, reducing incomplete squeegeeing due to residue and thus improving squeegee efficiency.

[0038] Furthermore, cleaning the scraper can reduce scraper wear and corrosion caused by residue buildup, thus extending the scraper's service life.

[0039] While the nozzle is washing the scraper, as the scraper rotates, some water will splash from the surface of the scraper to the top of the flotation tank. During the process of the concentrate floating, some tailings are often carried along. However, since the adhesion between these tailings and air bubbles is weak, when the splashed water enters the flotation tank, it will wash the slurry. These tailings will be flushed back into the slurry, thus purifying the flotation concentrate.

[0040] Furthermore, a fence assembly is also installed on the cantilever beam.

[0041] Beneficial effects: The fencing 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 the skimmer assembly.

[0042] A method for separating carbon and ash from coal gasification slag by flotation includes the following steps:

[0043] After pretreatment, the coal gasification slag is made into a slurry suitable for flotation.

[0044] The slurry is transported to an external mineralization unit for mineralization treatment;

[0045] The mineralized slurry is fed into a flotation tank;

[0046] The slurry that needs to be discharged into the tailings collection section is separated using turbulent channels and flow-blocking components, which retains the fine particles in this part of the slurry and then pumps it back to the top of the flotation tank for reflotation through a circulation mechanism; the rest of the slurry continues to flow along the turbulent channels until it is collected and processed by the tailings collection section. Attached Figure Description

[0047] Figure 1 This is a three-dimensional structural schematic diagram of the coal gasification slag carbon-ash flotation separation device of the present invention.

[0048] Figure 2 for Figure 1 The front view.

[0049] Figure 3 for Figure 1 Side view.

[0050] Figure 4 for Figure 2Cross-sectional view at point AA.

[0051] Figure 5 for Figure 4 Cross-sectional view at point BB.

[0052] Figure 6 for Figure 5 A magnified view of a portion of point M in the middle.

[0053] Figure 7 for Figure 5 Axonometric view of the medium-grooved wheel carrier.

[0054] Figure 8 for Figure 6 A magnified view of a portion of point O in the middle.

[0055] The reference numerals in the accompanying drawings include: 1. Flotation tank; 2. Concentrate collection section; 3. Tailings collection section; 4. Inclined carrier; 5. Circulation pipe; 6. Power assembly; 7. Driven wheel; 8. Feed pipe; 9. Discharge pipe; 10. Fence assembly; 101. Cantilever beam; 102. Rotating shaft; 103. Grooved wheel carrier; 104. Scraper; 105. Slot; 106. Slot rod; 107. Pin; 201. Nozzle; 202. Annular groove; 401. Turbulent flow channel; 402. Flow obstruction component; 403. Return trough; 404. Tail fin; 405. Base; 501. Circulation pump; 601. Stirring shaft; 602. Stirring blade. Detailed Implementation

[0056] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0057] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0059] The following detailed description illustrates the specific implementation method:

[0060] Example 1 is basically as shown in the appendix. Figures 1-8 As shown:

[0061] A coal gasification slag carbon-ash flotation separation device mainly includes a flotation tank 1, which is one link in the entire process. A feed pipe 8 is connected to the flotation tank 1. A concentrate collection section 2 and a tailings collection section 3 are connected to the flotation tank 1. The concentrate collection section 2 is located at the top of the flotation tank 1, and the tailings collection section 3 is located at the bottom of the flotation tank 1. Specifically, the concentrate collection section 2 includes an annular carrier. The annular carrier is fixed to the outer top of the flotation tank 1 by welding. An annular groove 202 is formed inside the annular carrier. The annular groove 202 is similar in appearance to the annular carrier, and its inner side is connected to the top of the flotation tank 1.

[0062] Preferably, the bottom of the annular trough 202 is inclined, with the side of the annular trough 202 near the feed pipe 8 being lower than the other side. The downwardly inclined side of the annular trough 202 is connected to the discharge pipe 9 (the discharge pipe 9 is connected to a concentrator (not shown in the figure) in the subsequent processing). Preferably, a number of nozzles 201 are also installed on the annular carrier. The nozzles 201 are circumferentially installed on the outer wall of the annular trough 202 to facilitate subsequent cleaning.

[0063] An inclined carrier 4 is provided between the flotation tank 1 and the tailings collection section 3. In this embodiment, the inclined carrier 4 is an inclined plate. The inclined carrier 4 has a reflux trough 403 and several turbulent channels 401. The reflux trough 403 is connected to the tailings collection section 3. The reflux trough 403 is connected to each of the turbulent channels 401 to form a communicating vessel. The turbulent channels 401 are all connected to the bottom of the flotation tank 1. Preferably, in this embodiment, each turbulent channel 401 is arranged at the same interval. Each turbulent channel 401 is provided with a flow-blocking element 402 for hindering the sinking of concentrate. Preferably, in this embodiment, the flow-blocking element 402 is a barb. In other embodiments, the flow-blocking element 402 can be other structures that can generate turbulence. The angle between the barb and the inclined carrier 4 is 15°~60°. The length of the barb is 1 / 4~1 / 2 of the width of the turbulent channel 401.

[0064] The bottom of flotation tank 1 is also connected to a circulation mechanism for pumping the slurry from the bottom of flotation tank 1 back to the top of flotation tank 1. Specifically, in conjunction with the attached... Figure 5 As shown, the circulation mechanism includes a circulation pipe 5, which contains a circulation pump 501. The circulation pump 501 pumps the slurry at the bottom of the flotation tank 1 back to the top of the flotation tank 1.

[0065] Preferably, a cantilever beam 101 is also provided at the top of the flotation tank 1. In this embodiment, the cantilever beam 101 has a circular structure. A stirring mechanism is provided inside the cantilever beam 101 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, stirring blades 602 are installed on the stirring shaft 601. 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-shaft servo motor, a drive wheel, a driven wheel 7, and a track. The drive wheel and the driven wheel 7 are linked by the track. The long-shaft servo motor is fixed to the top of the cantilever beam 101 by bolts. The output shaft of the long-shaft servo motor is axially welded to the drive wheel, and the driven wheel 7 is axially welded to the stirring shaft 601, thereby enabling the long-shaft servo motor to drive the stirring shaft 601 to rotate. Preferably, a fence assembly 10 is also provided on the cantilever beam 101. The fence assembly 10 mainly includes a grid plate and a fence. Its main function is to provide an activity area for the staff and prevent other items from falling into the equipment and affecting the normal operation of the flotation tank 1.

[0066] A skimmer assembly is provided between the suspension beam 101 and the flotation tank 1 to scrape the foam on the top of the flotation tank 1 to the concentrate collection section 2. Specifically, the skimmer assembly includes a rotating shaft 102, a grooved wheel carrier 103, and at least one scraper 104. In this embodiment, all four skimmer assemblies are circumferentially arranged on the top of the flotation tank 1; combined with the attached... 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 grooved wheel carrier 103 is coaxially welded and fixed to the rotating shaft 102. Four sets of grooves 105 are provided on the grooved wheel 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 engaged with the top of the flotation tank 1. Figure 4 As shown, at least one lever 106 is welded and fixed on one side of the stirring shaft 601. A pin 107 is welded and fixed on the lever 106. When the lever 106 rotates, the pin 107 slides and engages with each of the lever slots 105 in sequence.

[0067] The specific implementation process is as follows:

[0068] After pretreatment, the coal gasification slag is made into a slurry suitable for flotation. For example, the coal gasification slag undergoes fine crushing and screening to remove large impurities and adjust the particle size distribution. Then, it is further ground to further refine the particles and increase the consistency of the particle surface properties.

[0069] The slurry is transported to an external mineralization unit for mineralization treatment; for example, the pretreated slurry is stably transported to a specially designed external mineralization unit via an efficient conveying system, such as pumping, where appropriate chemical reagents (such as collectors, frothers, etc.) are added to enhance the flotation performance of specific mineral particles, creating favorable conditions for subsequent flotation operations. (Prior technologies will not be elaborated upon here.)

[0070] The mineralized slurry is fed into the flotation tank 1 through the feed pipe 8 at a pressure of 0.02 MPa.

[0071] Start the long-shaft 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 upward to the flotation tank 1, while the unmineralized slurry (mainly high-ash materials, containing some fine-particle high-carbon materials) will move downward to the flotation tank 1.

[0072] When 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 surface into the annular groove 202. At the same time, the nozzle 201 is used to clean the surface of the scraper 104 to ensure that the surface of the scraper 104 is clean.

[0073] Unmineralized slurry, after passing through the inclined carrier 4, will be discharged into the tailings collection section 3.

[0074] As the slurry flows through the turbulent channel 401 and impacts the flow-blocking element 402 (i.e., barbs), local turbulence is generated. Under the combined effect of the turbulence and the flow-blocking element 402, the fine particles (i.e., fine high-carbon materials, the same below) flow back in the opposite direction or remain at the bottom of the flotation tank 1. Then, the slurry remaining 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.

[0075] The following are two sets of experimental data from this device:

[0076] A gasification slag fine slag sorting experiment in region A:

[0077] The proportion of particles with a diameter <0.074mm was 59.80%, and the slurry recycling rate was 40%.

[0078] The flotation results of this device are as follows:

[0079] Chemicals: The dosage of the collector (diesel) is 3500 g (diesel) / t (coal gasification slag), and the dosage of the foaming agent (2-octanol) is 2000 g (2-octanol) / t (coal gasification slag).

[0080] sample mass / g Ash As is 201.5 72.03 Concentrate 50.82 21.35 Tailings 152.99 88.90

[0081] The flotation results of conventional flotation devices are as follows:

[0082] Chemicals: The dosage of the collector (diesel) is 10,000 g (diesel) / t (coal gasification slag), and the dosage of the foaming agent (2-octanol) is 2,000 g (2-octanol) / t (coal gasification slag).

[0083] sample mass / g Ash As is 199.5 72.03 Concentrate 47.29 22.84 Tailings 150.30 87.82

[0084] A gasification slag fine slag sorting experiment in region B:

[0085] Particles with a diameter <0.074mm accounted for 70.80%, and the slurry recycling rate was 60%.

[0086] The flotation results of this device are as follows:

[0087] Chemicals: The dosage of the collector (diesel) is 2500 g (diesel) / t (coal gasification slag), and the dosage of the foaming agent (2-octanol) is 2500 g (2-octanol) / t (coal gasification slag).

[0088] sample mass / g Ash As is 202.75 60.27 Concentrate 38.82 19.31 Tailings 160.39 70.79

[0089] The flotation results of conventional flotation devices are as follows:

[0090] Chemicals: The dosage of the collector (diesel) is 8000 g (diesel) / t (coal gasification slag), and the dosage of the foaming agent (2-octanol) is 2500 g (2-octanol) / t (coal gasification slag).

[0091] sample mass / g Ash As is 200.5 60.27 Concentrate 30.54 25.33 Tailings 172.81 66.13

[0092] In summary, in both sets of experiments, the proportion of particles smaller than 0.074 mm in the fine gasification slag was relatively high, at 59.80% and 70.80%, respectively. This indicates that the high content of fine particles in the gasification slag may have a certain impact on the flotation process. Despite the high content of fine particles, good flotation results were achieved in both experiments using this device, demonstrating its good adaptability to fine-particle gasification slag.

[0093] In both experiments, the amount of diesel fuel used as a collector was lower when using this device compared to conventional flotation devices. This demonstrates the advantage of this device in reducing reagent consumption, which helps to lower costs and reduce environmental pollution.

[0094] When using this device, the concentrate ash content in both experiments was lower than that of conventional flotation devices, indicating that this device performs better in reducing concentrate ash content.

[0095] Meanwhile, the tailings ash content of this device is higher than that of conventional flotation devices, which indicates that the quality of the concentrate produced by this device is better than that of conventional flotation devices.

[0096] In summary, this device has significant advantages in reducing reagent consumption and improving flotation efficiency.

[0097] Example 2 differs from Example 1 only in that, in conjunction with the appendix... Figure 6 and attached Figure 8 As shown, each barb has a base 405 welded to its bottom. The base 405 is rotatably connected to the inclined carrier 4. Specifically, each base 405 is equipped with a groove that allows it to rotate within a certain angle. The base 405 can rotate freely in the groove. Each barb has a tail wing 404 on its back. The tail wing 404 and the barb are designed as an integrated unit.

[0098] The specific implementation process is as follows:

[0099] When the slurry in the turbulent channel 401 impacts the barbs in different directions, the barbs will adaptively adjust according to the turbulence direction to maintain the best turbulence effect, so that the fine particles in the slurry can return to the bottom of the flotation tank 1 with the shortest ejection path. At the same time, since the barbs can automatically adjust their posture to adapt to the turbulence, the wear of the barbs caused by uneven turbulence can be reduced, thus improving the service life of the barbs.

[0100] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific structures and / or characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A coal gasification slag carbon-ash floatation separation device, comprising a floatation tank (1); a concentrate collection part (2) and a tailing collection part (3) are communicated with the floatation tank (1), the concentrate collection part (2) is located at the top of the floatation tank (1), and the tailing collection part (3) is located at the bottom of the floatation tank (1); characterized in that: The inclined carrier (4) is arranged between the flotation tank (1) and the tailing collection part (3), the inclined carrier (4) is internally provided with a reflux groove (403) and a plurality of turbulent flow channels (401), the reflux groove (403) is communicated with the tailing collection part (3), the reflux groove (403) is respectively communicated with each of the turbulent flow channels (401) to form a communicating vessel, each of the turbulent flow channels (401) is communicated with the bottom of the flotation tank (1), and each of the turbulent flow channels (401) is internally provided with a flow resistance piece (402) for resisting the sinking of the concentrate. The flow resistance piece (402) is a barb. The top of the flotation tank (1) is provided with a suspension beam (101), the suspension beam (101) is internally provided with a stirring mechanism, the stirring mechanism is used for stirring the ore pulp in the flotation tank (1), and the suspension beam (101) and the flotation tank (1) are provided with a foam scraping assembly for scraping the foam at the top of the flotation tank (1) to the concentrate collection part (2). The stirring mechanism comprises a stirring shaft (601) and a power assembly (6), and the power assembly (6) is used for driving the stirring shaft (601) to rotate. 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 rotationally connected with the suspension beam (101) and the flotation tank (1) respectively, the groove wheel carrier (103) is coaxially fixedly connected with the rotating shaft (102), a plurality of slot pushing grooves (105) are arranged on the groove wheel carrier (103), the scraper (104) is fixedly connected to one side of the rotating shaft (102), and the bottom of the scraper (104) is in sliding fit with the top of the flotation tank (1); at least one slot pushing rod (106) is further arranged on the stirring shaft (601), a latch (107) is arranged on the slot pushing rod (106), and when the slot pushing rod (106) rotates, the latches (107) are in sliding fit with the slot pushing grooves (105) in sequence.

2. The coal gasification slag carbon-ash floatation separation apparatus according to claim 1, characterized by: The angle between the choke member (402) and the inclined carrier (4) is .

3. The coal gasification slag carbon-ash floatation separation apparatus of claim 2, wherein: The length of the flow resistor (402) is 1 / 10 of the width of the turbulent flow passage (401) .

4. The coal gasification slag carbon-ash floatation separation apparatus of claim 3, wherein: The concentrate collection part (2) comprises an annular carrier, the annular carrier is sleeved outside the top of the flotation tank (1), an annular groove (202) is formed in the annular carrier, and the annular groove (202) is communicated with the top of the flotation tank (1).

5. The coal gasification slag carbon-ash floatation separation apparatus of claim 4, wherein: The bottom of the annular groove (202) is inclined, and the annular groove (202) is communicated with an outlet pipe (9) on the side inclined downward.

6. The coal gasification slag carbon-ash floatation separation apparatus of claim 5, wherein: The bottom of the flow resistance piece (402) is provided with a base (405), the base (405) is rotationally connected with the inclined carrier (4), and the back of the flow resistance piece (402) is provided with a tail wing (404).

7. The coal gasification slag carbon-ash floatation separation apparatus of claim 6, wherein: A plurality of nozzles (201) are further arranged on the annular carrier, and the nozzles (201) are used for cleaning the side scraped by the scraper (104).

8. The coal gasification slag carbon-ash floatation separation apparatus of claim 7, wherein: A fence assembly (10) is further arranged on the suspension beam (101).

9. A method of carbon-ash floatation separation of coal gasification slag, carried out on the basis of the device for carbon-ash floatation separation of coal gasification slag according to any one of claims 1-8, characterized by: The method comprises the following steps: After the coal gasification slag is pretreated, the ore pulp suitable for flotation is formed; The ore pulp is transported to an external mineralization device for mineralization treatment; The mineralized ore pulp is input into the flotation tank (1). The ore pulp which needs to be discharged into the tailings collecting part (3) is separated by the turbulent flow channel (401) and the flow resistance member (402), so that the fine particles in the ore pulp are retained and are pumped back to the top of the flotation tank (1) by the circulating mechanism for re-flotation; the rest of the ore pulp continues to flow along the turbulent flow channel (401) until it is collected and treated by the tailings collecting part (3).

Images