A high bubble carrying capacity broad separation cell for confined mineralization flotation

Abstract

This invention discloses a high-bubble-carrying-capacity wide-area separation tank for confined mineralization flotation, belonging to the field of mineral processing technology. The device includes a first slurry inlet pipe, a second slurry inlet pipe, a rapid separation tank, and a large bubble generation induction device. The large bubble generation induction device is located on the second slurry inlet pipe and is used to inject large bubbles into the mineralized slurry. The rapid separation tank is equipped with a slurry spraying and dispersing mechanism and a slurry spiral dispersing mechanism. The slurry spraying and dispersing mechanism is located above the slurry spiral dispersing mechanism and is used to spray the raw ore slurry downwards and the mineralized slurry upwards, respectively, causing the two slurries to form counter-current diffusion and collision. During operation, the mineralized slurry carries large bubbles into the rapid separation tank, making full contact with the raw ore slurry, allowing the bubbles to further capture the target minerals and rapidly float to the surface, achieving flotation separation. This invention can significantly reduce coarse particle desorption losses and improve mineral flotation recovery efficiency.

Description

Technical Field

[0001] This invention relates to the field of flotation and mineral processing technology, specifically to a wide-area separation cell with high bubble carrying capacity for confined mineralization flotation. Background Technology

[0002] Flotation is an important mineral processing method that utilizes the differences in the physicochemical properties of mineral surfaces to separate valuable minerals from gangue minerals. It is widely used in the processing of metallic minerals, coal, and non-metallic mineral resources. During flotation, hydrophobic mineral particles, after being treated with reagents, collide with and adhere to air bubbles, forming mineralized bubbles. These mineralized bubbles then move upwards under buoyancy, forming a foam layer on the surface of the slurry, thereby achieving the enrichment and recovery of valuable minerals.

[0003] With the continuous development and utilization of mineral resources, easily processed mineral resources are gradually decreasing, and ore properties are becoming increasingly complex. This places higher demands on the efficient utilization of resources and energy conservation in mineral processing. On the one hand, as the particle size of ore fragments gradually decreases, the efficient recovery of fine and micro-fine-grained minerals has become an important direction for the development of flotation technology. On the other hand, to reduce energy consumption and mineral loss during grinding, improving the recovery efficiency of coarse-grained minerals during flotation, while ensuring sufficient mineral liberation, is also of great significance.

[0004] However, compared to fine-grained minerals, coarse-grained minerals, due to their larger particle size and higher mass, are more significantly affected by gravity, inertia, and fluid disturbance during flotation. Although coarse particles have a higher probability of collision and are more likely to come into contact with air bubbles, their stable transport and separation after mineralization still present considerable challenges.

[0005] First, the small-sized bubbles used in traditional flotation processes have limited capacity to carry coarse mineral particles. When coarse particles adhere to the bubble surface, it significantly increases the load on the mineralized bubbles, reducing their rising speed. Furthermore, the particle-bubble interface is more susceptible to the effects of pulp flow, turbulence, and shearing, causing coarse particles to detach from the bubble surface and resulting in the loss of valuable minerals.

[0006] Secondly, existing flotation equipment typically completes processes such as slurry agitation, bubble generation, particle collision and adhesion, and mineralized bubble separation simultaneously within the same tank. Coarse mineralized particles need to undergo a relatively long upward transport to enter the froth layer. During this process, the mineralized bubbles are in a complex flow field environment for an extended period, increasing the probability of particle desorption and reducing the effective recovery rate of coarse mineral particles.

[0007] Furthermore, in order to improve the recovery of coarse particles, traditional flotation equipment usually needs to increase the pulp residence time or increase the equipment volume. However, a longer residence time will reduce the processing efficiency of the equipment and increase the chance of mineralized particles being disturbed by the fluid, making it difficult for the flotation process to simultaneously meet the requirements of high recovery rate and high processing capacity.

[0008] Therefore, in order to address the problems of insufficient bubble carrying capacity, long transport distance of mineralized particles, slow separation speed and easy desorption in the flotation process of coarse-grained minerals, it is necessary to develop a flotation device that can improve bubble carrying capacity, shorten the transport path of mineralized particles and achieve rapid separation and recovery, so as to improve the flotation efficiency and resource utilization of coarse-grained minerals. Summary of the Invention

[0009] The purpose of this invention is to propose a wide-area separation cell with high bubble carrying capacity for confined mineralization flotation, so as to solve the problems proposed by the prior art.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: a wide-area separation tank with high bubble carrying capacity for confined mineralization flotation, comprising a first slurry inlet pipe, a second slurry inlet pipe, a rapid separation tank, and a large bubble generation induction device; the first slurry inlet pipe and the second slurry inlet pipe are located on one side of the rapid separation tank and are respectively connected to the rapid separation tank; the first slurry inlet pipe is used to transport raw ore slurry to the rapid separation tank; the second slurry inlet pipe is used to transport mineralized slurry to the rapid separation tank;

[0011] The large bubble generation induction device is installed on the second slurry inlet pipe and is used to inject large bubbles into the mineralized slurry;

[0012] The rapid separation tank is equipped with a slurry spraying and dispersing mechanism and a slurry spiral dispersing mechanism. The slurry spraying and dispersing mechanism is located above the slurry spiral dispersing mechanism. The slurry spraying and dispersing mechanism is connected to the first slurry inlet pipe through a first diversion pipe. The slurry spiral dispersing mechanism is connected to the second slurry inlet pipe through a second diversion pipe. The slurry spraying and dispersing mechanism sprays the raw ore slurry downwards, and the slurry spiral dispersing mechanism sprays the mineralized slurry upwards. The two rapidly dispersed slurries collide in opposite directions. The large bubbles carrying mineral particles in the mineralized slurry rise and come into contact with the raw ore slurry sprayed from the slurry spraying and dispersing mechanism, capturing the target minerals and causing them to float to the surface, thus achieving rapid flotation separation.

[0013] As a further improvement of the present invention, the slurry spraying and dispersing mechanism includes multiple spray pipe groups, which are evenly arranged in the rapid separation tank; the spray pipe groups are respectively connected to the first diversion pipeline, and each spray pipe group includes multiple circumferentially distributed spray pipes, with the end of the spray pipe forming a spray nozzle facing downward.

[0014] As a further improvement of the present invention, the slurry spiral dispersion mechanism includes multiple spraying discs, the number of which is the same as the number of spraying pipe groups, and each spraying disc is located directly below a spraying pipe group; the spraying disc is disc-shaped, and an annular guide cavity is provided inside it, the annular guide cavity is tangentially connected to the slurry conveying pipe on the second diversion pipeline, and the mineralized slurry enters the annular guide cavity tangentially; nozzles that communicate with the annular guide cavity are arranged circumferentially on the spraying disc.

[0015] As a further improvement of the present invention, the first diversion pipeline includes a primary pipeline, a secondary pipeline, and a tertiary pipeline that are interconnected. One end of the primary pipeline is connected to the first slurry inlet pipeline. The secondary pipeline is perpendicularly connected to the primary pipeline, dividing the slurry into two streams with opposite flow directions. The tertiary pipeline is perpendicularly connected to the secondary pipeline, dividing the slurry in the secondary pipeline into two streams. The spray pipe assembly is connected to the tertiary pipeline. The structure of the second diversion pipeline is similar to that of the first diversion pipeline.

[0016] As a further improvement of the present invention, the large bubble generation induction device includes a slurry conveying pipe and an annular shell. The slurry conveying pipe is connected to the second slurry inlet pipe. The annular shell is located on the outer periphery of the slurry conveying pipe and forms an annular sealed gas chamber with the outer wall of the slurry conveying pipe. A downstream conical oblique hole is opened at the lower part of the slurry conveying pipe. The large-diameter end of the downstream conical oblique hole communicates with the annular sealed gas chamber, and the small-diameter end communicates with the inside of the slurry conveying pipe. An air supply interface is provided at the upper part of the annular shell, and the air supply interface communicates with the annular sealed gas chamber.

[0017] As a further improvement of the present invention, the large bubble generation induction device further includes a pulse purging interface, which is connected to the annular sealed gas chamber.

[0018] As a further improvement of the present invention, there are two downstream conical inclined holes, which are symmetrically arranged along the vertical center line of the second slurry inlet pipe.

[0019] As a further improvement of the present invention, the diameter of the large-diameter end of the co-current conical oblique hole is 6mm, the diameter of the small-diameter end is 2mm, the cone angle of the nozzle is 45°, and the co-current angle between the hole axis and the slurry conveying pipeline axis is 20°.

[0020] As a further improvement of the present invention, the bubble particle size generated by the large bubble generation induction device is within 1 to 3 mm.

[0021] As a further improvement of the present invention, the annular sealed gas chamber is divided into two or more chambers by at least one annular partition, and each chamber has two downstream conical oblique holes on the delivery pipeline.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) By setting up a large bubble generation induction device, the present invention forms large-particle-size bubbles in the mineralized slurry, improves the buoyancy and carrying capacity of the bubbles, and enables coarse-particle minerals to adhere more stably to the surface of the bubbles and float with the bubbles, thereby reducing the instability and desorption of mineralized bubbles caused by large particle mass.

[0024] (2) By setting up a rapid separation tank, the present invention enables bubbles carrying mineral particles to quickly enter the separation area, reducing the residence time of mineralized bubbles in the slurry, reducing the impact of fluid disturbance on the stability of particle-bubble bonding, and improving the recovery efficiency of coarse mineral particles.

[0025] (3) The present invention uses a combination of a slurry spraying dispersion mechanism and a slurry spiral dispersion mechanism to form an up-down counter-diffusion flow between the raw ore slurry and the mineralized slurry. The two slurries collide fully in the rapid separation tank, so that the bubbles can fully contact the target mineral and improve the flotation separation effect.

[0026] (4) This invention enhances the mineral carrying capacity by using large bubbles and reduces the ineffective residence time of mineralized particles by using a rapid separation structure, so that coarse mineral particles can be separated and recovered in a short time, thereby improving the processing efficiency of the equipment and reducing the energy consumption in the flotation process.

[0027] (5) This invention can be used as an independent flotation device or in combination with existing flotation devices. By enhancing the carrying and rapid separation capabilities of coarse mineral particles, it improves resource utilization efficiency and has good industrial application value. Attached Figure Description

[0028] Figure 1 This is a front view of the rapid separation tank of the present invention.

[0029] Figure 2 This is a top view of the rapid separation tank of the present invention.

[0030] Figure 3 This is a structural diagram of the slurry spraying dispersion mechanism and the slurry spiral dispersion mechanism of the present invention.

[0031] Figure 4 This is a schematic diagram of the structure of the large bubble generation induction device of the present invention.

[0032] Figure 5 This is a schematic diagram of the downstream conical oblique hole of the present invention.

[0033] Explanation of reference numerals in the attached drawings: 1-First slurry inlet pipe; 2-Second slurry inlet pipe; 3-Rapid separation tank; 31-Slurry spraying and dispersing mechanism; 311-First diversion pipe; 312-Spraying pipe; 313-Spraying nozzle; 32-Slurry spiral dispersing mechanism; 321-Second diversion pipe; 322-Spraying disc; 323-Nozzle; 4-Overflow trough; 5-Tailure outlet; 6-Large bubble generation induction device; 61-Slurry conveying pipe; 62-Annular shell; 63-First gas chamber; 64-Second gas chamber; 65-Co-current conical oblique hole; 66-Gas supply interface; 67-Pulse purging interface; 68-Annular baffle; 69-Flange. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0035] like Figure 1 As shown, a high-bubble-carrying-capacity wide-area separation tank for confined mineralization flotation according to the present invention includes a first slurry inlet pipe 1, a second slurry inlet pipe 2, a rapid separation tank 3, and a large bubble generation induction device 6. The first slurry inlet pipe 1 and the second slurry inlet pipe 2 are located on one side of the rapid separation tank 3 and are respectively connected to the rapid separation tank 3. The first slurry inlet pipe 1 is used to transport raw ore slurry to the rapid separation tank. The second slurry inlet pipe 2 is used to transport mineralized slurry to the rapid separation tank 3, and mineralization equipment is connected outside the second slurry inlet pipe 2. An overflow trough is provided above the rapid separation tank 3 for the collection of concentrate.

[0036] The large bubble generation induction device 6 is installed on the second slurry inlet pipe 2 and is used to inject large bubbles into the mineralized slurry.

[0037] like Figure 2 and Figure 3As shown, a slurry spraying and dispersing mechanism 31 and a slurry spiral dispersing mechanism 32 are provided in the middle of the rapid separation tank 3. The slurry spraying and dispersing mechanism 31 is located above the slurry spiral dispersing mechanism 32. The slurry spraying and dispersing mechanism 31 is connected to the first slurry inlet pipe 1 through the first diversion pipe 311. The slurry spiral dispersing mechanism 32 is connected to the second slurry inlet pipe 2 through the second diversion pipe 321. The slurry spraying and dispersing mechanism 31 sprays the raw ore slurry downward, while the slurry spiral dispersing mechanism 32 sprays the mineralized slurry upward. The two rapidly dispersed slurries collide in opposite directions. The large bubbles carrying mineral particles in the mineralized slurry rise and come into contact with the raw ore slurry sprayed from the slurry spraying and dispersing mechanism, capturing the target minerals and causing them to float to the surface, thus achieving rapid flotation separation.

[0038] The slurry spraying and dispersing mechanism 31 includes multiple spray pipe groups evenly arranged in the rapid separation tank 3. The spray pipe groups are respectively connected to the first diversion pipeline 311, and each spray pipe group includes multiple circumferentially distributed spray pipes 312 with the spray pipe openings facing downwards.

[0039] The slurry spiral dispersion mechanism 32 includes multiple spray discs 322, the number of which is the same as the number of spray pipe groups. Each spray disc 322 is located directly below a spray pipe group. The spray disc 322 is disc-shaped and has an annular guide cavity inside. The annular guide cavity is tangentially connected to the slurry delivery pipe on the second diversion pipeline 321, and the mineralized slurry enters the annular guide cavity tangentially. Nozzles 323 are arranged circumferentially on the spray disc and communicate with the annular guide cavity.

[0040] The first diversion pipeline 311 includes interconnected primary, secondary, and tertiary pipelines. One end of the primary pipeline is connected to the first slurry inlet pipeline 1. The secondary pipeline is perpendicularly connected to the primary pipeline, dividing the slurry into two streams flowing in opposite directions. The tertiary pipeline is perpendicularly connected to the secondary pipeline, dividing the slurry within the secondary pipeline into two streams. The spray pipe assembly is connected to the tertiary pipeline. The second diversion pipeline 321 has a similar structure to the first diversion pipeline 311.

[0041] like Figure 4 and Figure 5 As shown, the large bubble generation induction device 6 includes a slurry conveying pipe 61 and an annular shell 62. The slurry conveying pipe 61 is connected to the second slurry inlet pipe 2. The annular shell 62 is located on the outer periphery of the slurry conveying pipe 61 and forms an annular sealed gas chamber with the outer wall of the slurry conveying pipe 61. A downstream conical inclined hole 65 is opened at the lower part of the slurry conveying pipe. The large diameter end of the downstream conical inclined hole 65 is connected to the annular sealed gas chamber, and the small diameter end is connected to the inside of the slurry conveying pipe. An air supply interface 66 is provided at the upper part of the annular shell 62 and is connected to the annular sealed gas chamber.

[0042] When the large bubble generation induction device 6 is used in conjunction with the second slurry inlet pipe 2, the second slurry inlet pipe is divided into two sections, and then the large bubble generation induction device 6 is connected, with the two ends connected by flanges 69.

[0043] Due to the strong inertia and gravitational effects of coarse particles, small bubbles or microbubbles have insufficient capacity to carry coarse particles, easily leading to the detachment of coarse mineral particles from the bubble surface. Since minerals are typically distributed across a wide range of particle sizes, including both small and large coarse particles, using a large bubble induction generator to supplement the slurry with large-sized bubbles can not only enhance the capture and carrying capacity of coarse mineral particles, but also facilitate the recovery of free fine mineral particles from the slurry.

[0044] Specifically, the large bubble generation induction device 6 also includes a pulse purging interface 67, which is connected to the annular sealed gas chamber. The pulse purging interface 67 is connected to the pulse purging unit and is used to input short-term high-pressure gas into the corresponding gas supply chamber. When the downstream conical inclined hole 65 experiences particle backflow or adhesion blockage due to long-term transportation of high-solids slurry, the corresponding gas injection hole can be cleaned by pulse purging without disassembling the entire device.

[0045] In this embodiment, there are two downstream conical inclined holes 65, symmetrically arranged along the vertical centerline of the second slurry inlet pipe 2. Figure 5 As shown, in the counterclockwise direction, the center line of one downstream conical oblique hole 65 is at 225 degrees, and the other is at 315 degrees.

[0046] Specifically, the diameter of the large-diameter end of the 65-type conical inclined hole is 6mm, the diameter of the small-diameter end is 2mm, the cone angle of the nozzle is 45°, and the angle between the hole axis and the axis of the slurry conveying pipeline is 20°.

[0047] Specifically, the bubble particle size generated by the large bubble generation induction device 6 is within 1 to 3 mm.

[0048] Specifically, the annular sealed gas chamber is divided into two chambers by an annular baffle 68, and each chamber has two downstream conical inclined holes 65 on its slurry delivery pipe. Alternatively, multiple annular baffles can be used to divide the annular sealed gas chamber into multiple sub-chambers. This multi-chamber structure can increase the bubble supply and bubble density.

[0049] The working principle of this invention is as follows: First, the mineralized slurry is transported to the rapid separation tank 3 through the second slurry inlet pipe 2. During the transport process, the mineralized slurry passes through the large bubble generation induction device 6. The large bubble generation induction device 6 injects gas into the slurry transport pipe 61, causing the gas to enter the slurry through the co-current conical inclined hole 65. Under the shearing action of the slurry flow, large bubbles with a particle size of 1-3 mm are formed. The formed large bubbles move synchronously with the mineralized slurry, improving the carrying capacity and buoyancy of mineral particles and reducing the risk of desorption due to the large mass of coarse mineral particles.

[0050] Subsequently, the mineralized slurry carrying mineral particles enters the second diversion pipe 321, where it is divided into multiple slurries and enters the annular guide cavity inside the slurry spiral dispersion mechanism 32 tangentially. Under the guidance of the annular guide cavity, the slurry generates a spiral motion and is ejected upward through the nozzle 323, causing the mineralized slurry to form a uniformly diffused inverted umbrella-shaped jet stream within the rapid separation tank 3.

[0051] At the same time, the raw ore slurry enters the first diversion pipeline 311 through the first slurry inlet pipe 1, and after multi-stage diversion, it enters the slurry spraying and dispersing mechanism 31, and is sprayed downward through the spray pipe 312, so that the raw ore slurry forms an umbrella-shaped downward diffusion flow.

[0052] Because the slurry spraying and dispersing mechanism 31 and the slurry spiral dispersing mechanism 32 are arranged vertically in opposite directions, the downward-diffused raw ore slurry and the upward-diffused mineralized slurry form counter-current flows and rapid collisions in the rapid separation tank 3. The two slurry flows come into full contact within the maximum diffusion area, causing large air bubbles carrying mineral particles to further collide, adhere to, and capture the target minerals in the raw ore slurry, thereby improving the recovery efficiency of the target minerals.

[0053] Under the action of buoyancy, the large bubbles carrying the target minerals and the mineralized bubbles move upward rapidly and enter the upper part of the rapid separation tank to form a foam layer. Then, the concentrate is collected through the overflow tank 4. The gangue minerals that are not captured by the bubbles are discharged from the tailings outlet 5 with the tailings.

[0054] This invention improves the carrying capacity of bubbles for coarse mineral particles by using a large bubble generation induction device 6, and at the same time, it shortens the movement distance of mineralized particles from the inside of the slurry to the foam layer by using the reverse spray dispersion structure in the rapid separation tank 3, thereby reducing the residence time of mineralized bubbles in the slurry and reducing particle desorption caused by fluid disturbance, thus achieving rapid and efficient flotation separation and recovery of coarse mineral particles.

[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. A high bubble carrying capacity broad separation cell for confined mineralization flotation, characterized in that, It includes a first slurry inlet pipe, a second slurry inlet pipe, a rapid separation tank, and a large bubble generation induction device; the first slurry inlet pipe and the second slurry inlet pipe are located on one side of the rapid separation tank and are respectively connected to the rapid separation tank; the first slurry inlet pipe is used to transport raw ore slurry to the rapid separation tank; the second slurry inlet pipe is used to transport mineralized slurry to the rapid separation tank; The large bubble generation induction device is installed on the second slurry inlet pipe and is used to inject large bubbles into the mineralized slurry; The rapid separation tank is equipped with a slurry spraying and dispersing mechanism and a slurry spiral dispersing mechanism. The slurry spraying and dispersing mechanism is located above the slurry spiral dispersing mechanism. The slurry spraying and dispersing mechanism is connected to the first slurry inlet pipe through a first diversion pipe. The slurry spiral dispersing mechanism is connected to the second slurry inlet pipe through a second diversion pipe. The slurry spraying and dispersing mechanism sprays the raw ore slurry downwards, and the slurry spiral dispersing mechanism sprays the mineralized slurry upwards. The two rapidly dispersed slurries collide in opposite directions. The large bubbles carrying mineral particles in the mineralized slurry rise and come into contact with the raw ore slurry sprayed from the slurry spraying and dispersing mechanism, capturing the target minerals and causing them to float to the surface, thus achieving rapid flotation separation.

2. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 1, characterized in that, The slurry spraying and dispersing mechanism includes multiple spray pipe groups, which are evenly arranged in the rapid separation tank. Each spray pipe group is connected to the first diversion pipeline. Each spray pipe group includes multiple circumferentially distributed spray pipes, and the end of each spray pipe forms a spray nozzle facing downwards.

3. The high-bubble-carrying-capacity wide-area separation cell for confined mineralization flotation according to claim 2, characterized in that, The slurry spiral dispersion mechanism includes multiple spraying discs, the number of which is the same as the number of spraying pipe groups, with each spraying disc located directly below a spraying pipe group; the spraying disc is disc-shaped, with an annular guide cavity inside, which is tangentially connected to the slurry delivery pipe on the second diversion pipeline, and the mineralized slurry enters the annular guide cavity tangentially; nozzles that communicate with the annular guide cavity are arranged circumferentially on the spraying disc.

4. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 1, characterized in that, The first diversion pipeline includes a primary pipeline, a secondary pipeline, and a tertiary pipeline that are interconnected. One end of the primary pipeline is connected to the first slurry inlet pipeline. The secondary pipeline is perpendicularly connected to the primary pipeline, dividing the slurry into two streams with opposite flow directions. The tertiary pipeline is perpendicularly connected to the secondary pipeline, dividing the slurry in the secondary pipeline into two streams. The spray pipe assembly is connected to the tertiary pipeline. The structure of the second diversion pipeline is similar to that of the first diversion pipeline.

5. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 1, characterized in that, The large bubble generation induction device includes a slurry conveying pipe and an annular shell. The slurry conveying pipe is connected to the second slurry inlet pipe. The annular shell is located on the outer periphery of the slurry conveying pipe and forms an annular sealed gas chamber with the outer wall of the slurry conveying pipe. A downstream conical oblique hole is opened at the lower part of the slurry conveying pipe. The large-diameter end of the downstream conical oblique hole communicates with the annular sealed gas chamber, and the small-diameter end communicates with the inside of the slurry conveying pipe. An air supply interface is provided at the upper part of the annular shell, and the air supply interface communicates with the annular sealed gas chamber.

6. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 5, characterized in that, The large bubble generation induction device also includes a pulse purging interface, which is connected to the annular sealed gas chamber.

7. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 6, characterized in that, There are two oblique conical holes in the downstream direction, which are symmetrically arranged along the vertical center line of the second slurry inlet pipe.

8. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 7, characterized in that, The diameter of the large-diameter end of the downstream conical inclined hole is 6mm, the diameter of the small-diameter end is 2mm, the cone angle of the nozzle is 45°, and the downstream angle between the hole axis and the slurry conveying pipeline axis is 20°.

9. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 8, characterized in that, The bubble particle size generated by the large bubble generation induction device is within 1 to 3 mm.

10. The high bubble carrying capacity wide-area separation cell for confined mineralization flotation according to claim 9, characterized in that, The annular sealed gas chamber is divided into two or more chambers by at least one annular partition, and each chamber has two downstream conical oblique holes on the slurry conveying pipe.

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