Stirring and ore grinding combined flotation integrated device and method

Abstract

The invention discloses a stirring and ore grinding combined flotation integrated device and method, and relates to the technical field of mineral separation equipment, the device comprises a stirring and ore grinding barrel, the top of the stirring and ore grinding barrel is provided with a water supplementing pipe and a feeding pipe, and the middle is provided with a tailing pipe; the stirring mechanism consists of a stirring shaft and stirring blades; one end of the stirring shaft is connected with a motor; the top of each flotation column is connected with a foam concentrate tank, the bottom of each flotation column is connected with a middling collecting pipe, and the middle of each flotation column is communicated with the top end of the stirring and grinding barrel through an inclined pipeline; one end of the inflating hole channel is positioned at the bottom in the stirring and grinding barrel, and the other end of the inflating hole channel is connected with an inflating device. The device is simple in structure and integrates ore grinding, grading, size mixing and flotation; the valuable mineral particles can be floated early, and the contradiction among the ore grinding granularity, medicament consumption and the separation recovery rate is solved; and the problems of low mineral recovery rate and low concentrate grade caused by excessive ore grinding, grading mismatching, poor size mixing effect and flotation water flow entrainment are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ore dressing equipment, and in particular to an integrated device and method for stirring, grinding and flotation. Background Art

[0002] The traditional mineral processing technology is to grind the material with a horizontal mill, and the ground pulp is classified by a spiral classifier or a cyclone. The coarse particle pulp returns to the mill, and the pulp that meets the classification requirements enters the flotation pulp conditioner / slurry mixer. At this time, the pulp is fully in contact with the reagent, the purpose is to make the surface of the target mineral hydrophobic and modified. The treated pulp enters the flotation machine or flotation column for flotation operation to select the target mineral from the pulp. The above-mentioned mineral processing process requires multiple devices to be used in series, which occupies a large area and has high operation and maintenance costs. Therefore, it is necessary to further research and develop high-efficiency and low-energy-consumption integrated and integrated mineral processing equipment.

[0003] As the development of high-quality mineral resources in my country is exhausted, low-quality minerals are gradually mined. In order to improve the resource recovery rate, flotation operations generally require that the minerals be ground to a micron-level particle size, with the aim of achieving monomer dissociation of useful minerals in the ore. Existing grinding equipment mainly includes: ball mill, rod mill, disc mill, roller mill, air flow mill, vibrating mill and stirred mill. The stirred mill consists of a cylinder and a stirrer, and the inside of the cylinder is filled with grinding media. The stirring medium and the material are stirred by the stirrer to produce movement, and the material is ground by friction, shear and impact. Compared with the horizontal mill, the structural design of the stirred mill is more conducive to the preparation of a specific particle size distribution and slurry concentration required for the flotation process. The stirring action of the stirred mill and the composite force field generated by the movement of the grinding medium are suitable for strengthening the distribution of gas and the interaction between minerals and agents. By adding agents and bubbles during the grinding process, the fresh mineral surface produced by grinding is prompted to interact with the agents and bubbles, so that the role of the agents can be maximized and the ground mineral particles can be recovered by flotation. In addition, during the grinding process, the reagents, bubbles and mineral particles are allowed to react to make the coarse particles with good floatability float up as soon as possible, which can increase the flotation particle size of the mineral, weaken the phenomenon of large particles of useful minerals being over-grinded, and partially solve the contradiction between mineral separation efficiency and grinding particle size. Therefore, it is necessary and feasible to develop an integrated device and method for stirring grinding and flotation. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated device and method for stirring, grinding and flotation to solve the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above object, in one aspect, the present invention provides an integrated device for stirring, grinding and flotation, comprising:

[0006] A stirred grinding barrel, the top of which is connected to a water supply pipe and a feed pipe, one end of which extends into the middle of the stirred grinding barrel; one side of the middle of the stirred grinding barrel is connected to a tailings pipe;

[0007] A stirring mechanism, the stirring mechanism comprising a stirring shaft rotating on the axis of the stirring mill barrel, one end of the stirring shaft extending into the stirring mill barrel is connected to a stirring blade, and the other end is connected to a motor;

[0008] A flotation column, at least one of which is arranged along the circumference of the stirred grinding barrel, the top of the flotation column is fixedly connected to a foam concentrate tank, the bottom is fixedly connected to a middling ore collecting pipe, the middling ore collecting pipe is connected to the inside of the stirred grinding barrel, and the middle of the flotation column is connected to the top of the stirred grinding barrel through an inclined pipe;

[0009] An air charging channel, one end of which is arranged in the stirring and grinding barrel near the bottom, and the other end is located outside the stirring and grinding barrel and is connected to the air charging device through a pipeline.

[0010] Optionally, the inflation channel is arranged at the center of the stirring shaft, one end of which is arranged on the bottom shaft body of the stirring shaft to form a channel exhaust hole, and the other end is arranged on the upper shaft body of the stirring shaft to form a channel air inlet, and the channel air inlet is connected to the inflation device, and the inflation device is fixedly connected to the circumferential side of the stirring shaft and forms an oil seal with the stirring shaft.

[0011] Optionally, a plurality of auxiliary air charging ports are arranged around the bottom of the barrel wall of the stirred grinding barrel, and the auxiliary air charging ports are evenly distributed circumferentially around the bottom of the barrel wall of the stirred grinding barrel. One end of each auxiliary air charging port is connected to the stirred grinding barrel, and the other end is connected to the air compressor.

[0012] Optionally, the stirring impeller is one or more of a straight-blade impeller, a folding-blade impeller, and a helical-blade impeller.

[0013] Optionally, the intermediate ore collecting pipe and the stirring grinding barrel are connected to the barrel wall along the tangent direction of the barrel cross section.

[0014] Optionally, the bottom of the inner cavity of the stirred grinding barrel is filled with grinding media.

[0015] Optionally, the inclined pipe is integrally formed with the flotation column, and the inclined pipe is sealedly connected to the stirred grinding barrel through a flange. A plurality of baffles are vertically arranged in the inclined pipe along the direction of bubble movement, so as to weaken the turbulence formed by the stirred grinding and interfere with the static sorting process in the flotation column.

[0016] Optionally, the inclined pipeline is integrally connected with the water supply pipe and the feed pipe.

[0017] Optionally, a dosing pipe is connected to the pipe body of the feed pipe located outside the stirring grinding barrel.

[0018] Optionally, a plurality of flotation columns are distributed along the circumference of the stirred grinding barrel, and the plurality of flotation columns are connected to the stirred grinding barrel individually or are connected to the stirred grinding barrel after being interconnected in a ring shape.

[0019] In another aspect, the present invention further provides a stirring grinding combined flotation method, using any one of the above-mentioned stirring grinding combined flotation integrated devices, comprising the following steps:

[0020] S1. Adding materials: adding slurry and water into the stirring grinding barrel;

[0021] S2, Grinding: The motor drives the stirring shaft to rotate, and the stirring blade drives the grinding medium to grind the slurry;

[0022] S3, Adding chemicals: Add flotation reagents into the stirred grinding barrel. The flotation reagents react with the surface of the ore particles to change the surface properties of the ore particles.

[0023] S4, aeration: gas is added into the stirred grinding barrel to form small bubbles, which adhere to the hydrophobic ore particles to form mineralized bubbles;

[0024] S5, flotation: mineralized bubbles float up and enter the flotation column to form a foam layer and recover the concentrate product;

[0025] S6, medium ore reflux: coarse particles that are not attached to bubbles or desorbed in the foam layer are refluxed to the stirred grinding barrel for further grinding;

[0026] S7. Tailings discharge: Hydrophilic tailings particles cannot float and are discharged through the tailings pipe.

[0027] Compared with the prior art, the present invention at least discloses the following beneficial effects:

[0028] The integrated device of stirred grinding and flotation of the present invention has a simple structure and is easy to use. It integrates grinding, classification, slurry adjustment and flotation, breaking the boundary between grinding and flotation. The above-mentioned device and method can realize the early floating of valuable mineral particles, better solve the contradiction between grinding particle size, reagent consumption and sorting recovery rate, and effectively solve the technical problems of low mineral recovery rate and low concentrate grade caused by excessive grinding, classification mismatch, poor slurry adjustment effect and entrainment of flotation water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1It is a front view of the stirring grinding combined with flotation integrated device according to an embodiment of the present invention;

[0031] Figure 2 is a cross-sectional view of a stirring shaft according to an embodiment of the present invention;

[0032] Figure 3 is a perspective view of an embodiment of the present invention;

[0033] Figure 4 This is a left side view of the embodiment of the present invention without the motor;

[0034] Figure 5 This is a top view of an embodiment of the present invention without the motor;

[0035] Figure 6 This is an axonometric diagram of an embodiment of the present invention without the motor;

[0036] Figure 7 It is a front view of some preferred embodiments of the present invention and a partial cross-sectional view of the inclined pipeline.

[0037] In the figure: 1. Motor; 2. Stirring shaft; 3. Aeration device; 4. Supplementary water pipe; 5. Valve; 6. Inclined pipe; 7. Stirring grinding barrel; 8. Tailings pipe; 9. Discharge inspection door; 10. Grinding medium; 11. Stirring impeller; 12. Middling collection pipe; 13. Flotation column; 14. Foam concentrate tank; 15. Feed pipe; 16. Dosing pipe; 17. Channel air inlet; 18. Channel exhaust hole; 19. Baffle; 20. Auxiliary air inlet. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The Chinese invention patent application with publication number CN1401434A discloses a tower grinding flotation machine that can realize grinding and flotation at the same time. The tower grinding flotation machine is divided into two parts, the flotation area and the grinding and flotation area, and consists of a tower body, a stirring spiral and a driving mechanism. However, the equipment described in the invention places grinding and flotation in the same cylinder, and the turbulent flow field caused by stirring and grinding is likely to deteriorate the flotation separation effect. Water entrainment and mechanical entrainment lead to a decrease in the grade of the flotation concentrate, and the separation effect on the material is limited.

[0040] The Chinese utility model patent with publication number CN201862462U discloses a vertical spiral stirring grinding and flotation integrated equipment, which consists of a cylinder, a driving mechanism, a spiral stirrer and its supporting mechanism. The equipment also places grinding and flotation in the same cylinder. The turbulent field caused by stirring grinding is likely to deteriorate the flotation separation effect. Water flow entrainment and mechanical entrainment lead to a decrease in the grade of flotation concentrate, and the sorting effect on materials is limited. In addition, the equipment is provided with an air inlet at the bottom of the cylinder, which is easily blocked by the deposited slurry, causing failure.

[0041] The Chinese utility model patent with publication number CN208711837U discloses an integrated equipment for grinding, magnetic separation and flotation of gold-containing tailings. A magnetic separation box and a flotation scraper are arranged on the upper part of the stirred grinding cylinder, which can solve the problem of low working efficiency of the integrated equipment for grinding, magnetic separation and flotation. However, the equipment also has the problem that the turbulent field caused by stirred grinding interferes with the flotation foam layer, deteriorates the flotation separation effect, and the water flow entrainment and mechanical entrainment lead to a decrease in the grade of the flotation concentrate, and the separation effect of the material is limited.

[0042] In view of the problems existing in the above-mentioned prior art, the embodiments of the present invention propose an integrated device and method for stirring grinding and flotation to achieve high-efficiency, low-energy consumption, integrated and integrated mineral processing.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Embodiment 1:

[0045] Reference Figures 1 to 6As shown, Embodiment 1 of the present invention provides an integrated device for stirring grinding and flotation, including a stirring grinding barrel 7, the top of which is integrally connected with an inclined pipe 6, the inclined pipe 6 is an inclined cone structure, the bottom of which is connected to the top of the stirring grinding barrel 7, and the top of which is connected to the flotation column 13. A stirring mechanism is arranged in the center of the stirring grinding barrel 7, the stirring mechanism includes a stirring shaft 2 that passes through the axis of the stirring grinding barrel 7, one end of the stirring shaft 2 extends into the stirring grinding barrel 7 and is connected to a stirring blade 11 on the shaft body near the bottom of the stirring grinding barrel 7, the other end of the stirring shaft 2 is located outside the stirring grinding barrel 7 and is connected to a motor 1, and the stirring shaft 2 is connected to the motor 1 through a coupling. The top of the stirred mill barrel 7 is connected with a feed pipe 15 and a supplementary water pipe 4, which are used to add slurry and water to the stirred mill barrel 7 respectively; the supplementary water pipe 4 is provided with a valve 5, which is used to control the opening and closing of the supplementary water pipe 4; one end of the feed pipe 15 extends into the middle of the stirred mill barrel 7, and the feed pipe 15 is also connected to a dosing pipe 16 on the pipe body outside the stirred mill barrel 7, which is fixedly connected to and connected to the feed pipe 15, and is used to add flotation reagents to the stirred mill barrel 7. A tailings pipe 8 is connected to one side of the middle of the stirred mill barrel 7, and the tailings pipe 8 is used to discharge the slurry composed of particles that have not been attached with bubbles and completed mineralization after stirring, and the discharged slurry forms a tailings product; it should be understood that the discharge end of the tailings pipe 8 is connected to a tailings pump for pumping out the tailings. A discharge inspection door 9 is provided near the bottom of the stirring mill barrel 7 for maintenance and removal of blockages in the barrel. The flotation column 13 is located on one side of the stirring mill barrel 7 and is fixed and connected to the stirring mill barrel 7 through an inclined pipe 6. The top of the flotation column 13 is connected to the foam concentrate tank 14, and the bottom of the flotation column 13 is connected to the medium ore collection pipe 12. One end of the medium ore collection pipe 12 is fixed and connected to the bottom of the flotation column 13, and the other end is obliquely inserted from the middle of one side of the stirring mill barrel 7 into the inner cavity of the stirring mill barrel 7, so as to collect the medium ore back to the stirring mill barrel 7 for secondary grinding.

[0046] In a specific embodiment, Figure 2 As shown, the stirring shaft 2 has an air filling channel inside, one end of the air filling channel is arranged on the bottom shaft body of the stirring shaft 2 to form a channel exhaust hole 18, and the other end is arranged on the upper shaft body of the stirring shaft 2 to form a channel air inlet 17, and the air filling device 3 is connected to the channel air inlet 17, the air filling device 3 is externally connected to the air filling hose, and forms an oil seal with the rotating stirring shaft 2 at the same time, and the high-pressure gas filled through the air filling hose enters the bottom of the inner cavity of the stirring grinding barrel 7 through the air filling channel in the stirring shaft 2.

[0047] In a specific embodiment, the stirring grinding and flotation integrated device is divided into three parts: a stirring grinding area, a transportation area and a flotation area. The stirring grinding area is provided with a stirring shaft 2 with an air-filling channel and filled with a grinding medium 10. During the stirring grinding process, air is inflated through the channel exhaust hole 18 at the bottom of the stirring shaft 2. The transportation area is an area including the upper part of the stirring grinding barrel 7 and the inclined pipeline 6, wherein a water supply pipe 4, a feed pipe 15 and a dosing pipe 16 are arranged above the stirring grinding barrel 7, wherein the lower end of the feed pipe 15 extends into the middle part of the stirring grinding barrel 7, and a tailings pipe 8 is arranged at the bottom of the transportation area. The flotation area is provided with a foam concentrate tank 14 and a middling collection pipe 12, and the middling collection pipe 12 is connected to the stirring grinding barrel 7 along a tangent.

[0048] The agitated grinding and flotation integrated device of the above structure integrates the functions of agitated grinding, classification, pulp conditioning, flotation and the like. While grinding the material, hydrophobic modification is achieved through the action of the flotation agent on the surface of the ore particles. The hydrophobic ore particles react with the bubbles to form mineralized bubbles. After passing through the transportation area and the flotation area, the concentrate foam is recovered from the foam concentrate tank 14, and the ore particles that have entered the flotation area but desorbed from the bubbles enter the intermediate ore collection pipe 12 and re-enter the agitated grinding area. The tailings are discharged through the tailings pipe 8.

[0049] In some optional embodiments, the inclined pipe 6 is sealed and connected to the stirring grinding barrel 7 via a flange, the inclined pipe 6 is integrally formed with the flotation column 13 , and the inclined pipe 6 is sealed and connected to the stirring shaft 2 .

[0050] In some optional embodiments, the inclined pipe 6 is integrally connected with the water supply pipe 4 , the drug adding pipe 16 , and the feed pipe 15 .

[0051] In some optional embodiments, the inner cavity bottom of the stirred grinding barrel 7 is filled with grinding media 10. Specifically, the selection of the grinding media 10 needs to take into account the hardness and fineness changes of the ore. For ores with higher hardness, metal media such as steel balls, steel segments or Leroy tetrahedrons may need to be used because they have greater energy density and crushing force. The size of the grinding media 10 directly affects the grinding efficiency and product fineness. Generally, the medium size is determined based on the feed particle size and the required product fineness. Small diameter grinding media 10 can increase the specific surface area per unit grinding volume and increase the collision and grinding probability of the medium and particles, which is particularly important for fine grinding and regrinding.

[0052] In some optional embodiments, the stirring blade 11 at the bottom of the stirring shaft 2 can be one or more of a straight blade, a folding blade, and a helical blade.

[0053] In some optional embodiments, the intermediate ore collecting pipe 12 is connected to the stirring grinding barrel 7 along the tangent direction of the barrel cross section and the barrel wall, as shown in FIG. Figure 5The tangential connection can promote the centrifugal movement of the slurry when it enters the stirring grinding barrel 7, so that the metal-containing minerals with higher density can enter the central area to participate in the grinding, and the non-metallic minerals (tailings) with lower density move along the barrel wall and enter the tailings pipe 8 to be discharged as tailings.

[0054] In some optional embodiments, one or more flotation columns 13 may be distributed around the stirring and grinding barrel 7 , or even be an annular body surrounding the stirring and grinding barrel 7 .

[0055] In a preferred embodiment, Figure 7 As shown, a plurality of baffles 19 are vertically arranged in the inclined pipe 6 along the direction of bubble movement, in order to reduce the turbulence caused by stirred grinding from interfering with the static separation process in the flotation column 13 .

[0056] In a preferred embodiment, Figure 7 As shown, a plurality of auxiliary air charging ports 20 are arranged around the bottom of the barrel wall of the stirred grinding barrel 7. The auxiliary air charging ports 20 are evenly distributed around the bottom of the barrel wall of the stirred grinding barrel 7. One end of each auxiliary air charging port 20 is connected to the stirred grinding barrel 7, and the other end is connected to the air compressor.

[0057] Working principle of embodiment 1 of the present invention:

[0058] The flotation reagent enters the feed pipe 15 from the dosing pipe 16, and enters the stirred grinding barrel 7 together with the ore paddle. At the same time, water is added to the stirred grinding barrel 7 through the supplementary water pipe 4. A valve 5 is provided on the upper part of the supplementary water pipe 4 to control the opening and closing of the supplementary water pipe 4. After the addition is completed, the motor 1 drives the stirring shaft 2 to start stirring. At this time, the coarse ore particles enter the grinding area and are ground by the grinding medium 10, the particle size is reduced, and the fresh surface is exposed. At the same time, due to the action of the flotation reagent, the surface of the ore particles is hydrophobic and modified. The inflation device 3 fills the inflation channel in the middle of the stirring shaft 2 with high-pressure gas. The gas enters from the channel air inlet 17 and is discharged to the inner cavity of the stirred grinding barrel 7 through the channel exhaust hole 18. Bubbles are formed under the movement and grinding action of the grinding medium 10. The bubbles adhere to the hydrophobic ore particles to form mineralized bubbles. These mineralized bubbles float to the flotation column 13 through the inclined pipe 6 connected in an oblique manner.

[0059] The mineralized bubbles rising to the top of the flotation column 13 are accompanied by the merger and collapse of the bubbles. The concentrate particles with the best floatability overflow with the foam to the foam concentrate tank 14 to be discharged as concentrate products; while the mineral particles that do not adhere well to the bubbles or are desorbed in the foam layer enter the intermediate ore collection pipe 12 under the action of gravity and flow back to the stirred grinding barrel 7. Under the action of centrifugation, the particles with higher density or coarser particle size will return to the center of the stirring area for re-grinding.

[0060] Since some tailings particles with hydrophilic properties are difficult to adhere to air bubbles, the slurry composed of particles that have not yet attached to bubbles and completed mineralization after stirring is finally discharged from the tailings pipe 8 to become tailings products.

[0061] Embodiment 2:

[0062] Embodiment 2 of the present invention provides a stirring grinding combined flotation method, using the stirring grinding combined flotation integrated device described in Embodiment 1, comprising the following steps:

[0063] Step S1, adding materials: adding slurry into the stirring mill barrel 7 through the feed pipe 15, adding water into the stirring mill barrel 7 through the water supply pipe 4, and the slurry enters the stirring mill barrel 7 and settles downward to reach the stirring mill area;

[0064] Step S2, grinding: the motor 1 drives the stirring shaft 2 to rotate, and the impeller of the stirring shaft 2 rotates to cause the grinding medium 10 to move, grinding the slurry, and the coarse ore particles enter the stirring and grinding area to be ground, the particle size is reduced, and the fresh surface is exposed;

[0065] Step S3, adding reagents: adding flotation reagents into the stirred grinding barrel 7 through the dosing pipe 16, and the flotation reagents enter the middle of the stirred grinding barrel 7 through the dosing pipe 16. In the turbulent field, the flotation reagents act on the surface of the ore particles to achieve surface modification;

[0066] Specifically, in some embodiments, the flotation reagent forms droplets in the turbulent field caused by the stirring shaft 2 and the grinding medium, and reacts with the surface of the mineral particles to achieve surface modification of the mineral particles;

[0067] Step S4, aeration: gas is charged into the stirred grinding barrel 7 through the aeration channel, and the gas is discharged from the channel exhaust hole 18 to form small bubbles, which adhere to the hydrophobic mineral particles to form mineralized bubbles;

[0068] Step S5, flotation: mineralized bubbles float up under the buoyancy of the bubbles, enter the flotation column 13 through the inclined pipe 6, and the mineral particles adhered to the bubbles are subjected to the foam layer along with the mineralized bubbles, and are recovered through the foam overflow tank to form a concentrate product;

[0069] Step S6, medium ore reflux: coarse particles that are not well adhered to the bubbles or desorbed in the foam layer enter the medium ore collection pipe 12 under the action of gravity and reflux to the stirred grinding barrel 7; the medium ore enters the stirred grinding barrel 7 along the tangent through the pipeline, and under the action of centrifugal force, the ore particles with higher density or coarser particle size enter the central part of the stirred grinding barrel 7, settle to the grinding area, and are further dissociated under the grinding of the grinding medium 10, and float up after the action of the reagent and bubbles;

[0070] Step S7, tailings discharge: hydrophilic tailings particles are difficult to adhere to the air bubbles, cannot float up under the buoyancy of the air bubbles, and are discharged through the tailings pipe 8.

[0071] The details not described in detail in the present invention are all conventional technical means well known to those skilled in the art.

[0072] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0073] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A stirring grinding combined with flotation integrated device, characterized in that: include: A stirred grinding barrel (7), the top of which is connected to a water supply pipe (4) and a feed pipe (15), one end of which extends into the middle of the stirred grinding barrel (7); a tailings pipe (8) is connected to one side of the middle of the stirred grinding barrel (7); A stirring mechanism, the stirring mechanism comprising a stirring shaft (2) rotating on the axis of the stirring mill barrel (7), a stirring blade (11) being connected to one end of the stirring shaft (2) extending into the stirring mill barrel (7), and the other end being connected to the motor (1); At least one flotation column (13) is arranged along the circumference of the stirred grinding barrel (7), the top of the flotation column (13) is fixedly connected to a foam concentrate tank (14), and the bottom is fixedly connected to a middling ore collection pipe (12), the middling ore collection pipe (12) is connected to the inside of the stirred grinding barrel (7), and the middle part of the flotation column (13) is connected to the top of the stirred grinding barrel (7) through an inclined pipe (6); An air filling channel, one end of which is arranged in the stirring grinding barrel (7) near the bottom, and the other end of which is located outside the stirring grinding barrel (7) and connected to the air filling device (3) through a pipeline.

2. The stirring grinding combined with flotation integrated device according to claim 1, characterized in that: The inflation channel is arranged at the center of the stirring shaft (2), one end of which is arranged on the bottom shaft body of the stirring shaft (2) to form a channel exhaust hole (18), and the other end is arranged on the upper shaft body of the stirring shaft (2) to form a channel air inlet (17), the channel air inlet (17) is connected to the inflation device (3), and the inflation device (3) is fixedly connected to the peripheral side of the stirring shaft (2) and forms an oil seal with the stirring shaft (2).

3. The stirring grinding combined with flotation integrated device according to claim 1, characterized in that: A plurality of auxiliary air charging ports (20) are arranged around the bottom of the barrel wall of the stirring grinding barrel (7).

4. The stirring grinding combined with flotation integrated device according to claim 1, characterized in that: The intermediate ore collecting pipe (12) and the stirring grinding barrel (7) are connected to the barrel wall along the tangent direction of the barrel cross section.

5. The stirring grinding combined with flotation integrated device according to claim 1, characterized in that: The bottom of the inner cavity of the stirring grinding barrel (7) is filled with grinding media (10).

6. The stirring grinding combined with flotation integrated device according to any one of claims 1 to 5, characterized in that: The inclined pipe (6) and the flotation column (13) are integrally formed, the inclined pipe (6) and the stirring grinding barrel (7) are sealed via a flange, and a plurality of baffles (19) are vertically arranged in the inclined pipe (6) along the direction of bubble movement.

7. The stirring grinding combined with flotation integrated device according to claim 6, characterized in that: The inclined pipeline (6) is integrally connected with the water supply pipe (4) and the feed pipe (15).

8. The stirring grinding combined with flotation integrated device according to claim 1, characterized in that: The feed pipe (15) is connected to a dosing pipe (16) on the pipe body located outside the stirring grinding barrel (7).

9. The stirring grinding combined with flotation integrated device according to claim 1, characterized in that: A plurality of flotation columns (13) are distributed along the circumference of the stirring grinding barrel (7), and the plurality of flotation columns (13) are connected to the stirring grinding barrel (7) individually or in a ring-shaped manner and then connected to the stirring grinding barrel (7).

10. A stirring grinding combined flotation method, using the stirring grinding combined flotation integrated device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, adding materials: adding ore pulp and water into the stirring grinding barrel (7); S2, grinding: the motor (1) drives the stirring shaft (2) to rotate, and the stirring blade (11) drives the grinding medium (10) to grind the ore pulp; S3, adding reagents: adding flotation reagents into the stirred grinding barrel (7), the flotation reagents react with the surface of the ore particles to change the surface properties of the ore particles; S4, aeration: filling the stirred grinding barrel (7) with gas to form small bubbles, which adhere to the hydrophobic mineral particles to form mineralized bubbles; S5, flotation: mineralized bubbles float up and enter the flotation column (13), forming a foam layer, and the concentrate product is recovered; S6, medium ore reflux: coarse particles that are not attached to the bubbles or desorbed in the foam layer are refluxed to the stirred grinding barrel (7) for further grinding; S7, tailings discharge: hydrophilic tailings particles cannot float and are discharged through the tailings pipe (8).

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