CN216631202U - Micro-bubble jet flotation machine with novel structure - Google Patents

Abstract

The utility model discloses a microbubble jet flotation machine with a new structure, which belongs to the field of coal mine treatment and comprises an outer cylinder body, wherein an inner cylinder body is installed on the lower surface of the inner wall of the outer cylinder body in a matched manner through a plurality of welded bosses and screws, a reflection cone is arranged on the inner wall of the inner cylinder body, an outer overflow chute is welded on the surface of the outer cylinder body, a steady flow grating is lapped on the inner wall of the outer cylinder body and is positioned above the inner cylinder body, the inner wall of the outer cylinder body is fixedly connected with the surface of the same inner overflow cylinder body through a plurality of fixed plates, and the lower surface of the inner wall of the inner cylinder body is communicated with the top end of a circulating material pipe. The novel-structure micro-bubble jet flotation machine solves the problems that foam flowing is obstructed due to arrangement of the mineralization pipe after the existing micro-bubble jet flotation machine is large, mineralized bubbles are entrained in tailings, and the retention time of the mineralized bubbles in a foam layer is too long, so that the recovery rate of clean coal is reduced, and the recovery rate of concentrate of the jet micro-bubble flotation machine is improved.

Description

Micro-bubble jet flotation machine with novel structure

Technical Field

The utility model relates to the field of coal mine treatment, in particular to a microbubble jet flotation machine with a novel structure.

Background

Froth flotation is a common method for separating clean coal from fine-particle coal slurry water, and a jet micro-bubble flotation column is a common type of flotation equipment, and is most representative of Imhoflot aerated flotation machines in Germany and JAMESON CELL in Australia. The German Imhoflot inflatable flotation machine adopts a Venturi jet inflation principle of a combined multi-nozzle pipe, ore pulp is inflated and mineralized and then fed into an inflatable ore pulp distributor connected to the bottom of a lower guide pipe, the inflatable ore pulp distributor is provided with a plurality of upward nozzles, upward gas-solid-liquid three-phase jet flows are formed in a separation groove body, mineralized bubbles are separated from ore pulp flows in the upward movement process in the separation groove body, the mineralized bubbles move upward to form a foam layer at the top of the separation groove, foam concentrate overflows to a concentrate collecting groove, the ore pulp separated from the mineralized bubble flows back to move downward and is discharged from a tailing box connected to the bottom of the separation groove body. Australian JAMESON CELL adopts a mode of parallel arrangement of a plurality of independent mineralizers, each ore pulp nozzle and a lower guide pipe form a set of mineralizer, the mineralizer is inflated by adopting a jet flow principle, air is sucked into the lower guide pipe and is cut into micro bubbles by means of fluid turbulence, the inflated ore pulp is downwards fed into a separation tank body through the lower guide pipe, mineralized bubbles and the ore pulp are separated at the outlet area of the lower guide pipe, the mineralized bubbles move upwards to form a mineralized foam layer at the upper part of the separation tank body, and the ore pulp is discharged from a tailing pipe at the bottom of the separation tank body. The common problem of the two flotation devices is that mineralized bubbles and ore pulp are not completely separated in a separation area, and when the aeration quantity is high and the consumption of a foaming agent is large, micro bubbles enter tailings along with the ore pulp, so that the loss of concentrate in the tailings is caused, and the flotation effect is influenced.

A jet flow microbubble flotation machine (application No. 201721126733.5), a cavitation jet flow microbubble flotation machine, a cavitation jet flow bubble generator (application No. 201911031732.6) and a jet type short column flotation machine (application No. 202020121204.1) are all provided with an inner cylinder in a separation tank body, aerated ore pulp is mostly folded back upwards under the action of the inner cylinder, mineralized bubbles in an upward outlet area of the inner cylinder move upwards, the ore pulp is folded back downwards from an annular gap between the inner cylinder and the outer cylinder and is discharged from a tailing tank as tailing flow, and entrainment of bubbles in descending ore pulp flow is slowed down to a certain extent. The difference is that the jet flow micro-bubble flotation machine (application No. 201721126733.5), a cavitation jet flow micro-bubble flotation machine and a cavitation jet flow bubble generator (application No. 201911031732.6) are provided with a conical reflection mechanism in an inner cylinder, and a rectification sieve plate is arranged at the outlet of the inner cylinder, so that the guidance and separation of mineralized bubbles and ore pulp are further enhanced. However, in the technical scheme adopted in the utility model, the separation of the mineralized bubbles and the ore pulp flow is incomplete, the problems of the two foreign flotation machines are not thoroughly solved, and the flotation machines still can carry the bubbles in the descending ore pulp flow under the conventional operation condition, particularly under the high-aeration-rate operation condition to cause the loss of the concentrate in the tailings.

On the other hand, the jet flow micro-bubble flotation machine mostly adopts a concentrate foam collecting mode of peripheral foam overflow, a foam flowing dead zone is often formed in the center of the upper part of the flotation machine after equipment is large-sized, and in addition, mineralization pipes are distributed on the cross section of the flotation machine to block foam flowing, so that the mobility of concentrate foam overflowing to the periphery is influenced, the foam is not smoothly discharged, the retention time of the mineralization bubbles in a foam layer is too long, and the improvement of the recovery rate of the concentrate coal is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a new-structure microbubble jet flotation machine, which solves the problems that the arrangement of a mineralization pipe of the existing microbubble jet flotation machine causes obstruction to foam flow and entrainment of mineralized bubbles in tailings, and the retention time of the mineralized bubbles in a foam layer is too long to cause reduction of the recovery rate of clean coal.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a new construction microbubble efflux flotation device, includes outer barrel, the barrel in the lower surface of the inner wall of outer barrel is installed through the cooperation of welded a plurality of boss and screw, the inner wall of interior barrel is provided with the reflection awl, the skin weld of outer barrel has outer overflow launder, the inner wall overlap joint of outer barrel has the stationary flow grid, the stationary flow grid is located the top of interior barrel.

The inner wall of the outer barrel is fixedly connected with the surface of the same inner overflow barrel through a plurality of fixing plates, the lower surface of the inner wall of the inner barrel is communicated with the top end of the circulating material pipe, the surface of the circulating material pipe is clamped on the lower surface of the inner wall of the tailing nipple, the upper surface of the tailing nipple is communicated with the lower surface of the inner wall of the outer barrel, and the left side surface of the inner wall of the tailing nipple is communicated with the tailing adjusting box through the tailing pipe.

The upper surface of outer barrel has operation platform through the screw mounting, operation platform's upper surface passes through three material distributor of screw fixedly connected with, three material distributor's inner wall is provided with a plurality of baffle, three material distributor's surface is linked together with a plurality of ore pulp distribution pipe's top, the bottom joint of ore pulp distribution pipe has bubble generator.

The surface of the three-material distributor is communicated with the surface of the bubble generator through a plurality of air supply pipes, the lower surface of the bubble generator is communicated with the top end of the lower guide pipe, the bottom end of the lower guide pipe is clamped on the lower surface of the steady flow grating, and the surface of the plurality of lower guide pipes is provided with the same annular foam guide cone.

As a preferable technical scheme of the utility model, the reflecting cone is fixedly connected to the lower surface of the inner wall of the inner cylinder body through a plurality of steel pipes welded on the inner wall, and the lower surface of the inner wall of the outer overflow launder is arranged in an inclined shape.

As a preferred technical scheme of the utility model, a clamping frame is welded above the inner wall of the inner barrel, the flow stabilizing grating is in lap joint with the upper surface of the clamping frame, the inner wall of the inner overflow barrel is communicated with the inner wall of the outer overflow chute through a communicating pipe, and the surface of the outer overflow chute is provided with an opening.

As a preferable technical solution of the present invention, a pulp valve is disposed on a surface of the pulp distribution pipe, the air supply pipe adopts a hose, and a check valve is disposed on a surface of the air supply pipe.

As a preferable technical scheme of the utility model, the top end of the ore pulp distribution pipe is positioned above the partition plates, the top end of the air supply pipe is positioned between the two corresponding partition plates, and the upper surface of the three-material distributor is provided with a feeding port.

In a preferred embodiment of the present invention, an inclined plate assembly is welded to a surface of the inner cylinder, and a surface of the inclined plate assembly is overlapped with an inner wall of the outer cylinder.

As a preferred technical scheme of the utility model, the surface of the bubble generator is clamped on the upper surface of the operation platform, the bubble generator comprises a sealing shell, nozzles, an air inlet ring and a cavitation pipe, the upper surface of the sealing shell is communicated with the bottom end of the ore pulp distribution pipe, the lower surface of the sealing shell is communicated with the top end of the lower guide pipe, the lower part of the inner wall of the sealing shell is clamped with the surface of the cavitation pipe, the upper surface of the cavitation pipe is overlapped with the lower surface of the air inlet ring, the upper surface of the air inlet ring is provided with a plurality of nozzles, and the inner wall of the sealing shell is clamped with the bottom ends of two corresponding air supply pipes.

As a preferred technical scheme of the present invention, the annular foam guiding cone includes an upper sealing plate, an outer cone, an inner cone, a sleeve and a lower sealing plate, wherein a lower surface of the upper sealing plate is welded to upper surfaces of the outer cone and the inner cone, lower surfaces of the outer cone and the inner cone are welded to an upper surface of the same lower sealing plate, and opposite surfaces of the lower sealing plate and the upper sealing plate are clamped to two ends of the plurality of sleeves.

As a preferable technical scheme of the utility model, the installation inclination angle of the inclined plate assembly is 70 degrees, and the longitudinal height is 500-1500 mm.

As a preferable technical scheme of the utility model, the surface of the three-material distributor is provided with a main air inlet pipe, the main air inlet pipe and the plurality of air supply pipes are positioned at the same height, and the surface of the main air inlet pipe is provided with a valve.

Compared with the prior art, the utility model can achieve the following beneficial effects:

the novel-structure micro-bubble jet flotation machine solves the problems that after the existing micro-bubble jet flotation machine is large-sized, the arrangement of the mineralization pipe hinders the foam flow and entrains the mineralization bubbles in tailings, and the retention time of the mineralization bubbles in a foam layer is too long, so that the recovery rate of clean coal is reduced, and the recovery rate of concentrate of the jet micro-bubble flotation machine is improved.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the front view of the present invention;

FIG. 3 is a schematic three-dimensional structure of the operation platform of the present invention;

FIG. 4 is a schematic three-dimensional sectional structure of the inner cylinder according to the present invention;

FIG. 5 is a schematic three-dimensional sectional structure of the outer cylinder according to the present invention;

FIG. 6 is a schematic perspective sectional view of the bubble generator of the present invention;

FIG. 7 is a front view of the tilt plate assembly of the present invention;

FIG. 8 is a schematic sectional view of the annular foam guide cone of the present invention in elevation;

FIG. 9 is a schematic top view of an annular foam pilot cone of the present invention;

wherein: 1 outer cylinder body, 2 outer overflow chute, 3 inner cylinder body, 4 reflection cone, 5 steady flow grating, 6 inner overflow cylinder, 7 circulation material pipe, 8 tailing short section, 9 tailing pipe, 10 tailing adjusting box, 11 operating platform, 12 three-material distributor, 13 bubble generator, 131 sealing shell, 132 nozzle, 133 air inlet ring, 134 cavitation pipe, 14 ore pulp distributing pipe, 15 ore pulp valve, 16 air supply pipe, 17 check valve, 18 total air inlet pipe, 19 lower conduit, 20 annular foam guide cone, 201 upper sealing plate, 202 outer cone, 203 inner cone, 204 sleeve pipe, 205 lower sealing plate, 21 inclined plate assembly, 22 communicating pipe, 23 clamping frame, 24 fixing plate, 25 material inlet

Detailed Description

Technical means for implementing the present invention; authoring features; the purpose served by the disclosure is to provide a thorough understanding of the utility model, and is to be construed as being a limitation on the scope of the utility model as defined by the appended claims. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples, unless otherwise specified, are conventional methods, materials used in the following examples; reagents and the like are commercially available unless otherwise specified.

Examples

As shown in fig. 1-9, the utility model provides a micro-bubble jet flotation machine with a new structure, which comprises an outer cylinder 1, wherein an inner cylinder 3 is installed on the lower surface of the inner wall of the outer cylinder 1 in a matching way through a plurality of welded bosses and screws, a reflection cone 4 is arranged on the inner wall of the inner cylinder 3, an outer overflow groove 2 is welded on the surface of the outer cylinder 1, a steady flow grating 5 is lapped on the inner wall of the outer cylinder 1, and the steady flow grating 5 is positioned above the inner cylinder 3.

The inner wall of outer barrel 1 is connected with the fixed surface of same interior overflow section of thick bamboo through a plurality of fixed plate 24, and the lower surface of the 3 inner walls of interior barrel is linked together with the top of circulation material pipe 7, and the lower surface of circulation material pipe 7's surface joint at the 8 inner walls of tailing nipple joint, and the upper surface of tailing nipple joint 8 is linked together with the lower surface of the 1 inner wall of outer barrel, and the left surface of tailing nipple joint 8 inner wall is linked together with tailing regulating box 10 through tailing pipe 9.

The upper surface of outer barrel 1 has operation platform 11 through the screw mounting, and three material distributor 12 of screw fixedly connected with are passed through to operation platform 11's upper surface, and the inner wall of three material distributor 12 is provided with a plurality of baffle, and three material distributor 12's surface is linked together with a plurality of ore pulp distribution pipe 14's top, and the bottom joint of ore pulp distribution pipe 14 has bubble generator 13.

The surface of the three-material distributor 12 is communicated with the surface of the bubble generator 13 through a plurality of air supply pipes 16, the lower surface of the bubble generator 13 is communicated with the top end of a lower guide pipe 19, the bottom end of the lower guide pipe 19 is clamped on the lower surface of the steady flow grating 5, and the surfaces of a plurality of lower guide pipes 19 are provided with the same annular foam guide cone 20.

In other embodiments, as shown in fig. 1 and 2, a pulp valve 15 is arranged on the surface of the pulp distribution pipe 14, a gas supply pipe 16 is a flexible pipe and a check valve 17 is arranged on the surface, the top end of the pulp distribution pipe 14 is located above the partition plate, the top end of the gas supply pipe 16 is located between the two partition plates, and a feeding port 25 is arranged on the upper surface of the three-material distributor 12.

Through setting up ore pulp valve 15, the flow velocity and the flow of its ore pulp can be controlled to ore pulp valve 15, make it can play the effect of good regulation and control when using, through setting up check valve 17, check valve 17 can prevent effectively that bubble generator 13 from blockking up or ore pulp refluence entering air supply pipe 16 when the stop work, and through setting up the baffle, the baffle can play the separation effect to inside different medium.

In other embodiments, as shown in fig. 3 and 4, a clamping frame 23 is welded above the inner wall of the inner cylinder 3, the flow stabilizing grid 5 is overlapped with the upper surface of the clamping frame 23, the inner wall of the inner overflow cylinder is communicated with the inner wall of the outer overflow chute 2 through a communicating pipe 22, an opening is formed in the surface of the outer overflow chute 2, the installation inclination angle of the inclined plate assembly 21 is 70 degrees, the longitudinal height is 500-1500mm, a main air inlet pipe 18 is formed in the surface of the three-material distributor 12, the main air inlet pipe 18 and the plurality of air supply pipes 16 are located at the same height, and a valve is arranged on the surface of the main air inlet pipe 18.

Through setting up the card frame 23, the card frame 23 can keep placing the stability of stationary flow grid 5, it is more convenient when making it use, through setting up communicating pipe 22, communicating pipe 22 can keep keeping good intercommunication effect between overflow launder and the outer overflow launder 2, be convenient for unified discharge treatment, through setting up the opening, the opening can be with the raw materials discharge of overflow launder and outer overflow launder 2 inside, through setting up hang plate subassembly 21, hang plate subassembly 21 has the effect according to ore pulp density separation, make the mineralize air bubble that density is little and the higher ore pulp of density obtain segregation more effectively.

In other embodiments, as shown in fig. 5 and 6, the surface of the bubble generator 13 is clamped to the upper surface of the operation platform 11, the bubble generator 13 includes a sealing shell 131, nozzles 132, an air inlet ring 133 and a cavitation pipe 134, the upper surface of the sealing shell 131 is communicated with the bottom end of the slurry distribution pipe 14, the lower surface of the sealing shell 131 is communicated with the top end of the lower conduit 19, the lower portion of the inner wall of the sealing shell 131 is clamped to the surface of the cavitation pipe 134, the upper surface of the cavitation pipe 134 is overlapped with the lower surface of the air inlet ring 133, the upper surface of the air inlet ring 133 is provided with a plurality of nozzles 132, and the inner wall of the sealing shell 131 is clamped to the bottom ends of the corresponding two air supply pipes 16.

Through setting up cavitation pipe 134, cavitation pipe 134 and nozzle 132, when using, can be under mutual cooperation, can the velocity of flow that remains stable, make its negative pressure state can keep, obtain the guarantee to the suction effect of gas, through setting up air supply pipe 16, air supply pipe 16 can keep the inside supply gas of bubble generator 13, through setting up air inlet ring 133, air inlet ring 133 can keep gas mixing more even when using, the dispersion effect after the gas of being convenient for gets into.

In other embodiments, as shown in fig. 7 and 9, the reflection cone 4 is fixedly connected to the lower surface of the inner wall of the inner cylinder 3 through a plurality of steel pipes welded to the inner wall, the lower surface of the inner wall of the overflow chute 2 is disposed in an inclined shape, the inclined plate assembly 21 is welded to the surface of the inner cylinder 3, the surface of the inclined plate assembly 21 is overlapped with the inner wall of the outer cylinder 1, the annular foam guiding cone 20 includes an upper sealing plate 201, an outer cone 202, an inner cone 203, a sleeve 204 and a lower sealing plate 205, the lower surface of the upper sealing plate 201 is welded to the upper surfaces of the outer cone 202 and the inner cone 203, the lower surfaces of the outer cone 202 and the inner cone 203 are welded to the upper surface of the same lower sealing plate 205, and the opposite surface of the lower sealing plate 205 and the upper sealing plate 201 are clamped to the two ends of the plurality of sleeves 204.

Through setting up annular foam guide cone 20, can assemble interior overflow section of thick bamboo 6 and outer overflow launder 2 with mineralize mineralization bubble, make its overall control more stable, through setting up sleeve pipe 204, sleeve pipe 204 can keep fixed with the good laminating on downcomer 19 surface, make its holistic height keep, under the inclined plane cooperation of its outer circular cone 202 and interior circular cone 203, when making the bubble rebound of its below, rather than the effect, make it form the driving force of a direction, and then accomplish and assemble and the mobile effect of direction.

The working principle is as follows:

s1, when the coal slurry machine works, fresh coal slurry is pressurized by a pump and then is fed into the three-material distributor 12, a plurality of distribution ports are formed in the upper layer and the lower layer of the three-material distributor 12, the ore slurry and air are distributed to the plurality of bubble generators 13 in an equal amount through the plurality of ore slurry distribution pipes 14 and the plurality of air supply pipes 16 respectively, when the pressurized ore slurry passes through the bubble generators 13, negative pressure is formed due to jet flow under the action of the nozzles 132 and the cavitation pipes 134, and the pressurized ore slurry is enabled to suck air through the plurality of air supply pipes 16 under the action of the negative pressure;

s2, adjusting the total gas supply quantity by the gas inlet main pipe and a valve on the gas inlet main pipe to adjust the quantity of gas sucked into the outside by the negative pressure between the two corresponding partition plates, and fully mineralizing the mineralized bubbles and the hydrophobic coal particles in the aerated ore pulp passing through the bubble generator 13 in the lower guide pipe 19 to form mineralized bubble aggregates;

s3, driving mineralized bubbles to the inner overflow cylinder 6 and the outer overflow chute 2 as concentrate to be discharged into the next operation link due to the action of the annular foam guide cone 20 in the space between the upper edge of the outer cylinder 1 and the outer edge of the inner overflow cylinder 6;

s4, allowing unmineralized particles to flow downwards into a tailing nipple 8 through an annular gap between the inner cylinder 3 and the outer cylinder 1, discharging the particles through a tailing pipe 9 and a tailing adjusting box 10 to serve as tailings to enter the next operation link, wherein the inclined plate assembly 21 is arranged in the annular gap between the inner cylinder 3 and the outer cylinder 1, and the mineralized bubbles with low density and ore pulp with high density are separated more effectively due to the separation effect of the inclined plate assembly 21 according to the density of the ore pulp;

s5, in the inclined plate assembly 21, the mineralized bubbles return to move upwards along the upper surface of the inclined channel and enter the foam layer again, the ore pulp moves downwards along the lower surface of the inclined channel, and the mineralized bubbles are blocked to enter tailings along with descending ore pulp flow.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

While there has been shown and described the fundamental principles of the utility model, the principal features and advantages thereof, it will be understood by those skilled in the art that the utility model is not limited by the foregoing embodiments, which are presently preferred and not intended to be limiting, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the utility model as defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a new construction microbubble jet flotation device, includes outer barrel (1), its characterized in that: the lower surface of the inner wall of the outer barrel (1) is provided with an inner barrel (3) through a plurality of welded bosses and screws in a matching manner, the inner wall of the inner barrel (3) is provided with a reflection cone (4), the surface of the outer barrel (1) is welded with an outer overflow groove (2), the inner wall of the outer barrel (1) is lapped with a steady flow grating (5), and the steady flow grating (5) is positioned above the inner barrel (3);

the inner wall of the outer cylinder body (1) is fixedly connected with the surface of the same inner overflow cylinder through a plurality of fixing plates (24), the lower surface of the inner wall of the inner cylinder body (3) is communicated with the top end of a circulating material pipe (7), the surface of the circulating material pipe (7) is clamped on the lower surface of the inner wall of a tailing short section (8), the upper surface of the tailing short section (8) is communicated with the lower surface of the inner wall of the outer cylinder body (1), and the left side surface of the inner wall of the tailing short section (8) is communicated with a tailing adjusting box (10) through a tailing pipe (9);

an operation platform (11) is installed on the upper surface of the outer barrel (1) through screws, three material distributors (12) are fixedly connected to the upper surface of the operation platform (11) through screws, a plurality of partition plates are arranged on the inner walls of the three material distributors (12), the surfaces of the three material distributors (12) are communicated with the top ends of a plurality of ore pulp distribution pipes (14), and bubble generators (13) are clamped at the bottom ends of the ore pulp distribution pipes (14);

the surface of the three-material distributor (12) is communicated with the surface of the bubble generator (13) through a plurality of air supply pipes (16), the lower surface of the bubble generator (13) is communicated with the top end of the lower guide pipe (19), the bottom end of the lower guide pipe (19) is clamped on the lower surface of the steady flow grating (5), and the surfaces of the lower guide pipes (19) are provided with the same annular foam guide cone (20).

2. The new structure micro-bubble jet flotation machine according to claim 1, characterized in that: the reflecting cone (4) is fixedly connected to the lower surface of the inner wall of the inner cylinder (3) through a plurality of steel pipes welded to the inner wall, and the lower surface of the inner wall of the overflow chute (2) is arranged in an inclined manner.

3. The new structure micro-bubble jet flotation machine according to claim 1, characterized in that: a clamping frame (23) is welded above the inner wall of the inner barrel body (3), the steady flow grating (5) is in lap joint with the upper surface of the clamping frame (23), the inner wall of the inner overflow barrel is communicated with the inner wall of the outer overflow chute (2) through a communicating pipe (22), and an opening is formed in the surface of the outer overflow chute (2).

4. The new structure micro-bubble jet flotation machine according to claim 1, characterized in that: the surface of ore pulp distributing pipe (14) is provided with ore pulp valve (15), air supply pipe (16) adopt the hose and the surface is provided with check valve (17).

5. The new structure micro-bubble jet flotation machine according to claim 1, characterized in that: the top of ore pulp distributor pipe (14) is located the top of baffle, the top of air supply pipe (16) is located between two baffles of correspondence, the upper surface of three material distributor (12) is provided with pan feeding mouth (25).

6. The new structure micro-bubble jet flotation machine according to claim 1, characterized in that: the surface welding of interior barrel (3) has hang plate subassembly (21), the surface of hang plate subassembly (21) and the inner wall overlap joint of outer barrel (1).

7. The new structure micro-bubble jet flotation machine according to claim 1, characterized in that: the surface joint of bubble generator (13) is at the upper surface of operation platform (11), bubble generator (13) are including sealed shell (131), nozzle (132), air inlet ring (133) and cavitation pipe (134), the upper surface of sealed shell (131) is linked together with the bottom of ore pulp distribution pipe (14), the lower surface of sealed shell (131) is linked together with the top of downcomer (19), the below of sealed shell (131) inner wall and the surface joint of cavitation pipe (134), the upper surface of cavitation pipe (134) and the lower surface overlap joint of air inlet ring (133), the upper surface of air inlet ring (133) is provided with a plurality of nozzle (132), the inner wall of sealed shell (131) and the bottom joint that corresponds two air supply pipes (16).

8. The new structure micro-bubble jet flotation machine according to claim 1, characterized in that: the annular foam guide cone (20) comprises an upper sealing plate (201), an outer cone (202), an inner cone (203), a sleeve (204) and a lower sealing plate (205), wherein the lower surface of the upper sealing plate (201) is welded with the upper surfaces of the outer cone (202) and the inner cone (203), the lower surfaces of the outer cone (202) and the inner cone (203) are welded with the upper surface of the same lower sealing plate (205), and the opposite surfaces of the lower sealing plate (205) and the upper sealing plate (201) are clamped with the two ends of the plurality of sleeves (204).

9. The new structure micro-bubble jet flotation machine according to claim 6, characterized in that: the installation inclination angle of the inclined plate assembly (21) is 70 degrees, and the longitudinal height is 500-1500 mm.

10. The new structure microbubble jet flotation machine according to claim 1, characterized in that: the surface of the three-material distributor (12) is provided with a main air inlet pipe (18), the main air inlet pipe (18) and the plurality of air supply pipes (16) are located at the same height, and a valve is arranged on the surface of the main air inlet pipe (18).

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