A combined stirring-grinding-flotation integrated device and method

Abstract

This invention discloses an integrated device and method for stirred grinding and flotation, relating to the field of mineral processing equipment technology. The device includes a stirred grinding tank with a water supply pipe and a feed pipe at the top and a tailings pipe in the middle. The stirring mechanism consists of a stirring shaft and stirring blades, with one end of the stirring shaft connected to a motor. At least one flotation column is arranged along the periphery of the stirred grinding tank, with the top of the column connected to a froth concentrate tank, the bottom connected to a middlings collection pipe, and the middle connected to the top of the stirred grinding tank via an inclined pipe. An air inlet is provided inside the stirred grinding tank, with one end located at the bottom of the tank and the other end connected to an air supply device. This invention features a simple structure, integrating grinding, classification, slurry conditioning, and flotation. It enables valuable mineral particles to float early and effectively, resolving the contradiction between grinding particle size, reagent consumption, and separation recovery rate. It also solves the problems of low mineral recovery and low concentrate grade caused by over-grinding, mismatched classification, poor slurry conditioning, and entrainment in the flotation water flow.

Description

Technical Field

[0001] This invention relates to the field of mineral processing equipment technology, and in particular to an integrated device and method for stirred grinding and flotation. Background Technology

[0002] Traditional mineral processing involves grinding materials using a horizontal mill. The resulting slurry is then classified using a spiral classifier or hydrocyclone. Coarse slurry is returned to the mill, while slurry with the required fineness enters a flotation slurry conditioner / conditioner. Here, the slurry comes into full contact with the reagents to hydrophobically modify the surface of the target mineral. The treated slurry then enters a flotation machine or flotation column for flotation to separate the target mineral. This process requires multiple machines connected in series, resulting in a large footprint and high maintenance costs. Therefore, further research and development of efficient, low-energy-consumption integrated mineral processing equipment is essential.

[0003] To improve resource recovery rates, flotation operations generally require grinding minerals to a particle size of micrometers, aiming to achieve the liberation of valuable minerals in the ore. Existing grinding equipment mainly includes: ball mills, rod mills, disc mills, roller mills, air jet mills, vibratory mills, and stirred mills. A stirred mill consists of a cylinder and an agitator, with the cylinder filled with grinding media. The agitator stirs the grinding media and material, generating motion and grinding the material through friction, shearing, and impact. Compared to horizontal mills, the structural design of stirred mills is more conducive to preparing specific particle size distributions and pulp concentrations required for flotation processes. The combined force field generated by the stirring action and grinding media movement in a stirred mill is suitable for enhancing gas distribution and the interaction between minerals and reagents. By adding reagents and air bubbles during the grinding process, the interaction between the fresh mineral surface and the reagents and air bubbles is promoted, maximizing the effect of the reagents and enabling the ground mineral particles to be recovered through flotation. Furthermore, by allowing reagents, air bubbles, and mineral particles to interact during the grinding process, coarse particles with good floatability can be quickly floated to the surface, thereby increasing the flotation particle size of the minerals and mitigating the phenomenon of over-grinding of large particles of valuable minerals. This partially resolves the contradiction between mineral separation efficiency and grinding particle size. Therefore, developing an integrated stirred grinding and flotation device and method is both necessary and feasible. Summary of the Invention

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

[0005] To achieve the above objectives, in one aspect, the present invention provides an integrated stirred grinding and flotation apparatus, comprising:

[0006] A stirred mill, 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 mill; a tailings pipe is connected to one side of the middle of the stirred mill.

[0007] A stirring mechanism, comprising a stirring shaft that rotates on the axis of the stirring mill, wherein a stirring blade is connected to one end of the stirring shaft that extends into the stirring mill, and the other end is connected to a motor.

[0008] Multiple flotation columns are arranged along the periphery of the stirred mill. Each flotation column is individually connected to the stirred mill or interconnected in a ring and then connected to the stirred mill. A froth concentrate trough is fixed to the top of each flotation column, and a middlings collection pipe is fixed to the bottom. The middlings collection pipe extends into the interior of the stirred mill. Several auxiliary air inlets are arranged around the bottom periphery of the stirred mill wall. The middlings collection pipe is connected to the mill wall tangentially to the cross-section of the mill. The middle of each flotation column is connected to the top of the stirred mill via an inclined pipe. Multiple baffles are vertically arranged inside the inclined pipe along the direction of bubble movement.

[0009] An air inlet is provided at the center of the stirring shaft. One end of the air inlet is located on the bottom end of the stirring shaft to form an exhaust port, and the other end is located on the upper end of the stirring shaft to form an air inlet. The air inlet is connected to an air inlet device, which is fixed to the periphery of the stirring shaft and forms an oil seal with the stirring shaft.

[0010] Optionally, the auxiliary air inlets are evenly distributed around the bottom of the stirred mill barrel, with one end of each auxiliary air inlet connected to the inside of the stirred mill barrel and the other end connected to an air compressor.

[0011] Optionally, the stirring impeller is one or more of a straight impeller, a folded impeller, and a helical impeller.

[0012] Optionally, the bottom of the inner cavity of the stirred mill is filled with grinding media.

[0013] Optionally, the inclined pipe is integrally formed with the flotation column, and the inclined pipe is sealed to the stirred grinding tank through a flange. Multiple baffles are vertically arranged inside the inclined pipe along the direction of bubble movement, in order to reduce the interference of turbulence formed by stirred grinding on the static separation process in the flotation column.

[0014] Optionally, the inclined pipe is integrated with the water supply pipe and the feed pipe.

[0015] Optionally, the feed pipe is connected to a dosing pipe on the pipe body located outside the stirred mill.

[0016] In another aspect, the present invention also provides a stirred grinding combined flotation method, using the integrated stirred grinding combined flotation apparatus described in any of the above claims, comprising the following steps:

[0017] S1. Feeding: Add slurry and water to the stirred mill tank;

[0018] S2. Grinding: The motor drives the stirring shaft to rotate, and the stirring blades drive the grinding media to grind the slurry.

[0019] S3. Adding reagents: Add flotation reagents to the stirred mill. The flotation reagents interact with the surface of the mineral particles and change the surface properties of the mineral particles.

[0020] S4. Gas filling: Gas is introduced into the stirred mill barrel to form small bubbles, which adhere to the hydrophobic mineral particles to form mineralized bubbles.

[0021] S5. Flotation: Mineralized bubbles rise to the surface and enter the flotation column, forming a froth layer and recovering the concentrate product;

[0022] S6. Mid-minerals reflux: Coarse particles that have not adhered to bubbles or have detached from the foam layer are refluxed back to the stirred mill for further grinding.

[0023] S7. Tailings discharge: Hydrophilic tailings particles cannot float and are discharged through the tailings pipe.

[0024] Compared with the prior art, the present invention discloses at least the following beneficial effects:

[0025] The integrated stirred grinding and flotation device of this invention has a simple structure and is easy to use. It integrates grinding, classification, slurry conditioning and flotation into one unit, breaking through the boundary between grinding and flotation. Using the above device and method, valuable mineral particles can be floated early and effectively solve the contradiction between grinding particle size, reagent consumption and separation recovery rate. It also effectively solves the technical problems of low mineral recovery rate and low concentrate grade caused by over-grinding, mismatched classification, poor slurry conditioning effect and entrainment in flotation water flow. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a front view of the integrated stirred grinding and flotation device according to an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the stirring shaft in an embodiment of the present invention;

[0029] Figure 3 This is a perspective view of an embodiment of the present invention;

[0030] Figure 4 The left view of the present invention with the motor hidden is shown in this embodiment.

[0031] Figure 5 This is a top view of the present invention with the motor hidden;

[0032] Figure 6 This is an isometric view of the invention with the motor removed, according to an embodiment of the invention.

[0033] Figure 7 These are front views of some preferred embodiments of the present invention and partial sectional views of inclined pipes in the embodiments.

[0034] In the diagram: 1. Motor; 2. Agitator shaft; 3. Aeration device; 4. Water supply pipe; 5. Valve; 6. Inclined pipe; 7. Agitated grinding drum; 8. Tailings pipe; 9. Discharge inspection door; 10. Grinding media; 11. Agitator blade; 12. Middlings collection pipe; 13. Flotation column; 14. Foam concentrate trough; 15. Feed pipe; 16. Dosing pipe; 17. Air inlet in the channel; 18. Air vent in the channel; 19. Baffle; 20. Auxiliary aeration port. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Chinese invention patent application CN1401434A discloses a tower-type grinding and flotation machine capable of simultaneous grinding and flotation. This tower-type grinding and flotation machine is divided into upper and lower parts: a flotation zone and a simultaneous grinding and flotation zone, and consists of a tower body, a stirring screw, and a drive mechanism. However, the equipment described in this invention places grinding and flotation in the same cylinder. The turbulent field created by the agitated grinding easily deteriorates the flotation separation effect. Water entrainment and mechanical entrainment lead to a decrease in the grade of the flotation concentrate, resulting in limited material separation efficiency.

[0037] Chinese utility model patent CN201862462U discloses a vertical spiral stirred grinding and flotation integrated device, which consists of a cylinder, a drive mechanism, a spiral stirrer, and its support mechanism. This device also places grinding and flotation within the same cylinder. The turbulent field created by the stirred grinding easily deteriorates the flotation separation effect. Water entrainment and mechanical entrainment lead to a decrease in the grade of the flotation concentrate, resulting in limited material separation efficiency. Furthermore, the device has an air inlet at the bottom of the cylinder, which is easily blocked by deposited slurry, causing malfunctions.

[0038] Chinese utility model patent with publication number CN208711837U discloses an integrated grinding, magnetic separation, and flotation equipment for gold-bearing tailings. It has a magnetic separation box and a flotation foam scraping device set at the top of the stirred grinding cylinder, which can solve the problem of low working efficiency of integrated grinding, magnetic separation, and flotation equipment. However, this 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 flotation concentrate, resulting in limited separation effect on materials.

[0039] To address the problems existing in the prior art, this invention proposes an integrated device and method for stirred grinding and flotation to achieve high-efficiency, low-energy consumption, integrated, and comprehensive mineral processing.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1:

[0042] Reference Figures 1 to 6As shown, Embodiment 1 of the present invention provides an integrated stirred grinding and flotation device, including a stirred grinding tank 7. An inclined pipe 6 is integrally connected to the top of the stirred grinding tank 7. The inclined pipe 6 has an inclined cone structure, with its cone bottom connected to the top of the stirred grinding tank 7 and its cone top connected to the flotation column 13. A stirring mechanism is provided in the center of the stirred grinding tank 7. The stirring mechanism includes a stirring shaft 2 that passes through the axis of the stirred grinding tank 7. One end of the stirring shaft 2 extends into the stirred grinding tank 7 and is connected to a stirring blade 11 on the shaft near the bottom of the stirred grinding tank 7. The other end of the stirring shaft 2 is located outside the stirred grinding tank 7 and is connected to a motor 1. The stirring shaft 2 and the motor 1 are connected by a coupling. The top of the stirred mill 7 is connected to a feed pipe 15 and a water supply pipe 4, which are used to add slurry and water to the stirred mill 7, respectively. A valve 5 is installed on the water supply pipe 4 to control its opening and closing. One end of the feed pipe 15 extends into the middle of the stirred mill 7. A dosing pipe 16 is also connected to the outer part of the feed pipe 15, which is fixed to and connected to the feed pipe 15, and is used to add flotation reagents to the stirred mill 7. A tailings pipe 8 is connected to one side of the middle of the stirred mill 7. The tailings pipe 8 is used to discharge slurry composed of particles that have not yet been mineralized by bubbles after stirring. The discharged slurry forms tailings products. It should be understood that the outlet 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 stirred mill 7 on its periphery for maintenance and removal of blockages inside the mill. The flotation column 13 is located on one side of the stirred mill 7 and is fixed and connected to the stirred mill 7 via an inclined pipe 6. The top of the flotation column 13 is connected to the froth concentrate trough 14, and the bottom of the flotation column 13 is connected to the middlings collection pipe 12. One end of the middlings collection pipe 12 is fixed and connected to the bottom of the flotation column 13, and the other end is obliquely inserted into the inner cavity of the stirred mill 7 from the middle of one side to collect the middlings back into the stirred mill 7 for secondary grinding.

[0043] In one specific embodiment, such as Figure 2 As shown, the stirring shaft 2 has an internal air inlet. One end of the air inlet is located on the bottom shaft of the stirring shaft 2 to form an exhaust port 18, and the other end is located on the upper shaft of the stirring shaft 2 to form an air inlet 17. An air inlet 3 is connected to the air inlet 17. The air inlet 3 is connected to an external air inlet hose and forms an oil seal with the rotating stirring shaft 2. The high-pressure air injected through the air inlet hose enters the bottom of the inner cavity of the stirring mill 7 through the air inlet in the stirring shaft 2.

[0044] In one specific embodiment, the integrated stirred grinding and flotation device is divided into three parts: a stirred grinding zone, a transport zone, and a flotation zone. The stirred grinding zone is equipped with a stirring shaft 2 with air-filled channels and filled with grinding media 10. During the stirred grinding process, air is supplied through the vent holes 18 at the bottom of the stirring shaft 2. The transport zone includes the upper part of the stirred grinding drum 7 and the inclined pipe 6. A water supply pipe 4, a feed pipe 15, and a reagent dosing pipe 16 are located above the stirred grinding drum 7, with the lower end of the feed pipe 15 extending into the middle of the stirred grinding drum 7. A tailings pipe 8 is located at the lower part of the transport zone. The flotation zone is equipped with a frothy concentrate trough 14 and a middlings collection pipe 12, which is tangentially connected to the stirred grinding drum 7.

[0045] The above-mentioned integrated stirred grinding and flotation unit combines stirred grinding, classification, pulp conditioning, and flotation functions. While grinding the material, it achieves hydrophobic modification through the surface interaction between flotation reagents and mineral particles. The hydrophobic mineral particles interact with bubbles to form mineralized bubbles. After passing through the transport zone and flotation zone, the concentrate foam is recovered from the foam concentrate tank 14, while the mineral particles that have entered the flotation zone but have desorbed from the bubbles enter the middlings collection pipe 12 and re-enter the stirred grinding zone. The tailings are discharged through the tailings pipe 8.

[0046] In some alternative embodiments, the inclined pipe 6 is sealed to the stirred mill 7 via a flange, the inclined pipe 6 is integrally formed with the flotation column 13, and the inclined pipe 6 is sealed to the stirring shaft 2.

[0047] In some alternative embodiments, the inclined pipe 6 is integrally connected with the water replenishment pipe 4, the chemical dosing pipe 16, and the feed pipe 15.

[0048] In some optional embodiments, the bottom of the inner cavity of the stirred mill 7 is filled with grinding media 10. Specifically, the selection of the grinding media 10 needs to consider the variations in the hardness and fineness of the ore. For ores with higher hardness, metal media, such as steel balls, steel segments, or Reuleaux tetrahedra, may be required because they have higher energy density and crushing force. The size of the grinding media 10 directly affects the grinding efficiency and product fineness. Generally, the media 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, increasing the probability of collision and grinding between the media and particles, which is particularly important for fine grinding and regrinding.

[0049] 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 folded blade, or a spiral blade.

[0050] In some optional embodiments, the middlings collection pipe 12 and the stirred mill 7 are connected to the barrel wall along the tangential direction of the barrel's cross-section, specifically as follows: Figure 5As shown. Tangential connection can promote centrifugal motion when the slurry enters the stirred mill 7. The denser metallic minerals can enter the central area to participate in grinding, while the less dense non-metallic minerals (tailings) move along the barrel wall and enter the tailings pipe 8 to be discharged as tailings.

[0051] In some alternative embodiments, the flotation column 13 may be distributed in one or more locations around the stirred mill 7, or even be an annular structure surrounding the stirred mill 7.

[0052] In a preferred embodiment, such as Figure 7 As shown, multiple baffles 19 are vertically arranged inside the inclined pipe 6 along the direction of bubble movement, in order to reduce the interference of turbulence formed by stirring and grinding on the static separation process in the flotation column 13.

[0053] In a preferred embodiment, such as Figure 7 As shown, the bottom periphery of the stirred mill 7 is provided with several auxiliary air inlets 20. The auxiliary air inlets 20 are evenly distributed circumferentially on the bottom periphery of the stirred mill 7. One end of each auxiliary air inlet 20 is connected to the inside of the stirred mill 7, and the other end is connected to an air compressor.

[0054] Working principle of Embodiment 1 of the present invention:

[0055] Flotation reagents enter the feed pipe 15 through the reagent addition pipe 16 and enter the stirred mill 7 along with the slurry. Simultaneously, water is added to the stirred mill 7 through the water replenishment pipe 4, which has a valve 5 at its upper part to control its opening and closing. After feeding, the motor 1 drives the stirring shaft 2 to begin stirring. At this time, coarse ore particles enter the grinding zone and are ground by the grinding media 10, reducing their particle size and exposing fresh surfaces. Simultaneously, due to the action of the flotation reagents, the surface of the ore particles is hydrophobically modified. The aeration device 3 injects high-pressure gas into the aeration channel in the middle of the stirring shaft 2. The gas enters through the inlet 17 and exits through the exhaust port 18 into the inner cavity of the stirred mill 7. Under the movement and grinding action of the grinding media 10, bubbles are formed. These bubbles adhere to the hydrophobic ore particles, forming mineralized bubbles. These mineralized bubbles rise to the flotation column 13 through the inclined pipe 6.

[0056] As the mineralized bubbles rise to the top of the flotation column 13, they merge and collapse. The concentrate particles with the best floatability overflow with the foam and are discharged into the foam concentrate tank 14 as concentrate products. Meanwhile, the mineral particles that do not adhere well to the bubbles or are desorbed from the foam layer enter the middlings collection pipe 12 under the action of gravity and flow back to the stirred mill 7. Under the action of centrifugation, the particles with higher density or coarser particle size will return to the center of the stirring zone for re-grinding.

[0057] Since some tailings particles with hydrophilic properties are difficult to adhere to air bubbles, the slurry composed of particles that have not yet adhered to air bubbles and completed mineralization after stirring is finally discharged from tailings pipe 8 as tailings product.

[0058] Example 2:

[0059] Embodiment 2 of the present invention provides a stirred grinding combined flotation method, using the integrated stirred grinding combined flotation device described in Embodiment 1, comprising the following steps:

[0060] Step S1, Feeding: Add slurry into the stirred mill 7 through the feed pipe 15, and add water into the stirred mill 7 through the water supply pipe 4. After entering the stirred mill 7, the slurry settles downwards to reach the stirred milling area.

[0061] Step S2, Grinding: Motor 1 drives the stirring shaft 2 to rotate. The rotation of the impeller of the stirring shaft 2 causes the grinding media 10 to move, grinding the slurry. Coarse ore particles enter the stirred grinding zone and are ground, reducing the particle size and exposing fresh surfaces.

[0062] Step S3, Adding reagents: Add flotation reagents into the stirred mill 7 through the reagent addition pipe 16. The flotation reagents enter the middle of the stirred mill 7 through the reagent addition pipe 16. In the turbulent field, the flotation reagents interact with the surface of the mineral particles to achieve surface modification.

[0063] Specifically, in some embodiments, the flotation reagent forms droplets in the turbulent field caused by the stirring shaft 2 and the grinding media, which interact with the surface of the mineral particles to achieve surface modification of the mineral particles;

[0064] Step S4, Aeration: Gas is introduced into the stirred mill 7 through the aeration channel. The gas is discharged from the vent hole 18 to form small bubbles. The small bubbles adhere to the hydrophobic mineral particles to form mineralized bubbles.

[0065] Step S5, Flotation: Mineralized bubbles rise under the buoyancy of the bubbles and enter the flotation column 13 through the inclined pipe 6. The mineral particles that are well adhered to the bubbles are carried by the mineralized bubbles to form a foam layer and are recovered through the foam overflow tank to form a concentrate product.

[0066] Step S6, Middlings Recirculation: Coarse particles that do not adhere well to bubbles or detach from the foam layer enter the middlings collection pipe 12 under gravity and are recirculated to the stirred mill 7; the middlings enter the stirred mill 7 tangentially through the pipe, and under the action of centrifugal force, the mineral particles with higher density or larger particle size enter the central part of the stirred mill 7, settle to the grinding area, and are further dissociated under the grinding of the grinding media 10, and float to the surface after reacting with the reagents and bubbles;

[0067] Step S7, Tailings Discharge: Hydrophilic tailings particles are difficult to adhere to air bubbles and cannot float under the buoyancy of air bubbles, so they are discharged through tailings pipe 8.

[0068] All aspects not detailed in this invention are conventional technical means well known to those skilled in the art.

[0069] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0070] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An integrated stirred grinding and flotation device, characterized in that, include: A stirred mill (7) is provided, with a water supply pipe (4) and a feed pipe (15) connected to the top of the stirred mill (7). One end of the feed pipe (15) extends into the middle of the stirred mill (7). A tailings pipe (8) is connected to one side of the middle of the stirred mill (7). The stirring mechanism includes a stirring shaft (2) that rotates on the axis of the stirring mill (7). One end of the stirring shaft (2) that extends into the stirring mill (7) is connected to a stirring blade (11), and the other end is connected to a motor (1). Multiple flotation columns (13) are arranged along the periphery of the stirred mill (7). Each flotation column (13) is individually connected to the stirred mill (7) or interconnected in a ring and then connected to the stirred mill (7). The top of the flotation column (13) is fixedly connected to a froth concentrate tank (14), and the bottom is fixedly connected to a middlings collection pipe (12). The middlings collection pipe (12) is connected to the interior of the stirred mill (7). Several auxiliary air inlets (20) are arranged on the periphery of the bottom of the stirred mill (7). The middlings collection pipe (12) is connected to the stirred mill (7) along the tangent direction of the cross-section of the barrel and to the barrel wall. The middle part of the flotation column (13) is connected to the top of the stirred mill (7) through an inclined pipe (6). Multiple baffles (19) are arranged vertically in the inclined pipe (6) along the direction of bubble movement. An air inlet is provided at the center of the stirring shaft (2). One end of the air inlet is provided on the bottom shaft of the stirring shaft (2) to form an air vent (18), and the other end is provided on the upper shaft of the stirring shaft (2) to form an air inlet (17). The air inlet (17) is connected to an air inlet device (3). The air inlet device (3) is fixed to the periphery of the stirring shaft (2) and forms an oil seal with the stirring shaft (2).

2. The integrated stirred grinding and flotation device according to claim 1, characterized in that, The bottom of the inner cavity of the stirred mill (7) is filled with grinding media (10).

3. The integrated stirred grinding and flotation device according to claim 1 or 2, characterized in that, The inclined pipe (6) is integrally formed with the flotation column (13), and the inclined pipe (6) is connected to the stirred mill (7) by a flange seal.

4. The integrated stirred grinding and flotation device according to claim 3, characterized in that, The inclined pipe (6) is integrally connected with the water replenishment pipe (4) and the feed pipe (15).

5. The integrated stirred grinding and flotation device according to claim 1, characterized in that, The feed pipe (15) is located outside the stirred mill (7) and is connected to a dosing pipe (16).

6. A stirred grinding and flotation method, using the integrated stirred grinding and flotation apparatus according to any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Feeding: Add slurry and water to the stirred mill tank (7); S2, Grinding: The motor (1) drives the stirring shaft (2) to rotate, and the stirring blade (11) drives the grinding media (10) to grind the slurry; S3. Adding reagents: Add flotation reagents to the stirred mill (7). The flotation reagents interact with the surface of the mineral particles and change the surface properties of the mineral particles. S4. Gas filling: Gas is filled into the stirred mill (7) to form small bubbles, which adhere to the hydrophobic mineral particles to form mineralized bubbles; S5, Flotation: Mineralized bubbles rise to the surface and enter the flotation column (13) to form a foam layer and recover the concentrate product; S6, Mid-mineral return: Coarse particles that have not adhered to the bubbles or have detached from the foam layer are returned to the stirred mill (7) for further grinding; S7. Tailings discharge: Hydrophilic tailings particles cannot float and are discharged through tailings pipe (8).

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