Impeller stator system of high-concentration flotation machine

Abstract

The invention provides a high-concentration flotation machine impeller stator system, and relates to the technical field of flotation equipment, the high-concentration flotation machine impeller stator system comprises a flotation machine groove body, an impeller and a stator, the impeller and the stator are arranged in the flotation machine groove body, and the impeller is connected with a flotation machine main shaft; the impeller and the stator are respectively provided with a concave part and a convex part, and the convex part and the concave part of the impeller and the stator are matched and mounted in a concave-convex embedding manner. According to the invention, the concave parts and the convex parts of the impeller and the stator are matched and mounted in an embedding manner, so that a shearing effect on multiple circumferences is formed, the shearing periphery between the impeller and the stator is obviously prolonged, the shearing effect of air can be enhanced, and uniform dispersion of air in high-concentration ore pulp and generation of small bubbles are guaranteed. The blade with holes on the impeller and the stator further prolongs the air shearing peripheral length, the blade area is reduced while the air shearing effect is improved, the particle suspension capacity is reduced, the particle suspension critical rotating speed is increased, and therefore the difference between the air critical rotating speed and the mineral particle suspension critical rotating speed is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flotation equipment, in particular to a high-concentration flotation machine impeller stator system. BACKGROUND

[0002] The flotation machine is an important separation equipment in the field of mineral processing. The impeller stator, as the core component of the flotation machine, undertakes the important work of air dispersion, mineral particle suspension, and reagent stirring, establishes a suitable kinetic environment for the complex gas-liquid-solid three-phase physical and chemical process, and thus realizes processes such as bubble generation, bubble collision with mineral particles, and formation of mineralized bubbles, to produce a froth product. The performance of the impeller stator directly determines the mechanical performance and process adaptability of the flotation machine.

[0003] With the rapid consumption of mineral resources, the proportion of single and easy-to-select ores is decreasing, and the proportion of poor and difficult-to-select ores is increasing. More and more mining enterprises are adopting the way of increasing flotation concentration to increase the ore processing capacity, reduce the water and electricity consumption and reagent consumption per unit of ore processing capacity, and ensure the economic feasibility of mineral resource development. However, the existing flotation theory considers that the appropriate flotation pulp mass concentration is generally 10% to 40%. If it exceeds the appropriate range, the air dispersion performance in the flotation equipment will deteriorate, causing a series of new problems such as large bubbles on the surface of the pulp, poor flotation selectivity, and reduced recovery rate of the target mineral. The conventional impeller stator system of the flotation machine cannot meet the requirements of high-concentration flotation process.

[0004] The main structure of the flotation impeller stator is a disc and blades. According to the different combinations of the impeller stator blades and the disc, closed, semi-closed, and open structures are formed. The impeller structure is more diverse than the stator form, and the blades are generally distributed in a single circle on the disc.

[0005] In the existing patent technology:

[0006] Chinese patent CN218872521U, announced on April 18, 2023, discloses a hollow blade impeller for a flotation machine, which improves the contact opportunity between air and mineral particles;

[0007] Chinese patent CN111495610A, published on August 7, 2020, discloses a multi-curve profile blade impeller, which improves the circulating capacity of the ore pulp;

[0008] Chinese patent CN110560273A, published on December 13, 2019, discloses a straight blade impeller, which improves the air suction capacity. To strengthen the performance of the impeller, the technical personnel designed an upper and lower double-layer blade structure, i.e., arranging impeller blades on the upper and lower circles of the disc;

[0009] Chinese patent CN116510918A, published on August 1, 2023, discloses an upper and lower double-layer blade combination impeller, which facilitates blade replacement;

[0010] Chinese patent CN114042541A published on February 15, 2022 discloses a double-layer blade impeller connected to the upper and lower ends of the air distributor, which strengthens air dispersion;

[0011] Chinese patent CN203494659U announced on March 26, 2014 discloses a semi-closed blade impeller with an upper and lower structure, which improves the circulating intensity of the ore pulp;

[0012] Chinese patent CN109225659A published on January 18, 2019 discloses an open blade impeller with an upper and lower structure, which widens the transportation area. Through further optimization, technicians have also designed an inner and outer multi-layer blade structure;

[0013] Chinese patent CN119747103A published on April 4, 2025 discloses an inner and outer three-layer blade structure flotation machine impeller, which increases the turbulence intensity and improves the recovery performance of fine particle minerals.

[0014] Chinese patent CN203494659U announced on March 26, 2014 discloses an impeller stator system, which regards the impeller stator as a whole, and solves the problems of insufficient air content and excessive turbulence intensity in the flotation machine by adding an impeller stator wrapper.

[0015] The impeller stator system disclosed in the above patents improves the working performance of the flotation machine from single-layer blade design to multi-layer blade design, but there is only one shear circle between the impeller and the stator blade.

[0016] The air dispersion critical speed of the flotation machine impeller is generally higher than the particle suspension critical speed, and the increase of the ore pulp concentration will have an adverse effect on air dispersion, the air dispersion critical speed will increase, the increase of the ore pulp concentration will have less adverse effect on the suspension of the mineral particles, and even will have a certain degree of beneficial effect, and the particle suspension critical speed can remain unchanged or decrease. That is, with the increase of the ore pulp concentration, the difference between the air dispersion critical speed and the particle suspension critical speed of the flotation machine will further increase. The existing flotation machine impeller stator generally takes the higher one of the air dispersion critical speed and the particle suspension critical speed as the design basis, and for the particle suspension process in high-concentration ore pulp, too many ore pulp circulation times will cause unnecessary energy consumption. SUMMARY

[0017] The purpose of the present application is to provide a high-concentration flotation machine impeller stator system, which can solve the problem of too large difference between the air dispersion critical speed and the particle suspension critical speed of the flotation machine impeller under high-concentration ore pulp flotation conditions, enhance the process adaptability of the flotation machine to high-concentration ore pulp, and provide key technical support for the development of high-concentration ore pulp special flotation machine;

[0018] The application provides a high-concentration flotation machine impeller stator system, which comprises a flotation machine tank body, an impeller and a stator, the impeller and the stator are arranged in the flotation machine tank body, the impeller is connected with a flotation machine main shaft, the impeller and the stator are respectively provided with a concave part and a convex part, and the convex part and the concave part of the impeller and the stator are matched and installed in a concave-convex inlaying mode.

[0019] Further, the impeller comprises a top disc and rotor blades, the top disc is connected with the flotation machine main shaft, and a plurality of rotor blades are distributed in a circumferential direction and connected to the bottom of the disc.

[0020] Further, the blades are serrated and provided with a plurality of small holes on the surface.

[0021] Further, the stator comprises a bottom disc and stator blades, a plurality of stator blades are distributed in a circumferential direction and connected to the top of the bottom disc, and a pulp flow hole is arranged on the bottom disc.

[0022] Further, the stator blades comprise first stator blades and second stator blades, the first stator blades and the second stator blades are arranged in a radial direction to form a concave part and a convex part, and the pulp flow hole is located between the first stator blades and the second stator blades and between the second stator blades.

[0023] Further, the first stator blades and the second stator blades are in a right-angled trapezoidal structure.

[0024] Further, an air distributor is further arranged at the center of the impeller.

[0025] Further, the air distributor comprises a cylinder and a cylinder bottom, the cylinder is connected to the cylinder bottom, and the cylinder and the cylinder bottom are both provided with small holes for shearing air.

[0026] Further, a circulating cylinder and a supporting false bottom are further arranged, the circulating cylinder is connected below the stator, and the supporting false bottom is connected below the circulating cylinder.

[0027] Further, the circulating cylinder comprises an upper ring, a cylinder and a lower ring, the upper ring and the lower ring are arranged at the upper and lower ends of the cylinder respectively, and the upper ring is connected with the bottom disc of the stator; the supporting false bottom comprises a top ring and a supporting leg, and the top ring is connected with the lower ring.

[0028] The technical scheme of the application is characterized in that the concave part and the convex part of the impeller and the stator are matched and installed in an inlaying mode, a shearing action on multiple circumferences is formed, the shearing periphery between the impeller and the stator is significantly lengthened, the shearing effect of air is strengthened, and the uniform dispersion of air in high-concentration pulp and the generation of small air bubbles are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the specific embodiments or prior art of the present application, the drawings required to be used in the description of the specific embodiments or prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 It is a schematic diagram of the system inside the present application;

[0031] Figure 2 It is a schematic diagram of the impeller of the present application;

[0032] Figure 3 It is a schematic diagram of the impeller A of the present application; Figure 2

[0033] Figure 4 It is a schematic diagram of the stator of the present application;

[0034] Figure 5 It is a schematic diagram of the stator of the present application; Figure 4

[0035] Figure 6 It is a schematic diagram of the air distributor of the present application;

[0036] Figure 7 It is a schematic diagram of the air distributor of the present application; Figure 6

[0037] Figure 8 It is a schematic diagram of the circulating cylinder of the present application;

[0038] Figure 9 It is a schematic diagram of the circulating cylinder of the present application; Figure 8

[0039] Figure 10 It is a schematic diagram of the support false bottom of the present application;

[0040] Figure 11 It is a schematic diagram of the support false bottom of the present application; Figure 10

[0041] Explanation of reference signs:

[0042] 1-impeller; 11-top disc; 12-rotor blade;

[0043] 2-stator; 21-first stator blade; 22-second stator blade; 23-bottom disc; 24-mineral pulp flow-through hole;

[0044] 3-air distributor; 31-cylinder; 32-cylinder bottom;​​​​​

[0045] 4 - Cylinder; 41 - Upper ring; 42 - Large web; 43 - Cylinder; 44 - Small web; 45 - Lower ring; 46 - Bolt hole;

[0046] 5 - False bottom; 51 - Top ring; 52 - Leg; 53 - Bolt hole;

[0047] 6 - Flotation tank; 7 - Flotation spindle; 8 - Connection flange; 9 - Air; 10 - Ore pulp. DETAILED DESCRIPTION

[0048] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0050] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Example 1

[0052] As Figures 1-11As shown, the present application provides a high-concentration flotation machine impeller 1 stator 2 system, comprising a flotation machine tank 6, an impeller 1 and a stator 2, the impeller 1 and the stator 2 are arranged in the flotation machine tank 6, the impeller 1 is connected to the flotation machine main shaft 7; the impeller 1 and the stator 2 have concave and convex parts respectively, and the convex and concave parts of the impeller 1 and the stator 2 are matched and installed in a concave-convex inlay manner.

[0053] Specifically, the impeller 1 stator 2 system is concentric and installed in the flotation machine tank 6, the impeller 1 is installed at the lower end of the flotation machine main shaft 7 through the connecting flange 8, the stator 2 is slightly higher than the impeller 1 in the axial direction, the lower edge of the impeller 1 is matched and installed with the upper edge of the stator 2 in a "inlay" manner, and the circumferences of the blades of the two maintain a certain gap (the circumference of the blade edge of the impeller 1 and the circumference of the adjacent stator 2 blade edge maintain a 5-100mm spacing according to the different specifications of the impeller 1 stator 2). The concave and convex parts of the impeller 1 and the stator 2 are matched and installed in an inlay manner, forming a shearing action on multiple circumferences, the shearing circumference between the impeller 1 and the stator 2 is significantly extended, which can strengthen the shearing effect of air, enhance the air dispersion capacity, reduce the air dispersion critical speed, and ensure the uniform dispersion of air in high-concentration ore pulp and the generation of small air bubbles.

[0054] Example 2

[0055] The impeller 1 comprises a top disc 11 and a rotor blade 12, the top disc 11 is connected to the flotation machine main shaft 7, and a plurality of rotor blades 12 are distributed in a circumferential direction and connected to the bottom of the disc. The blade is sawtooth-shaped, and the surface is provided with a plurality of small holes. The stator 2 comprises a bottom disc 23 and a stator 2 blade, a plurality of stator 2 blades are distributed in a circumferential direction and connected to the top of the bottom disc 23, and the bottom disc 23 is provided with an ore pulp flow hole 24. The stator 2 blade comprises a first stator blade 21 and a second stator blade 22, the first stator blade 21 and the second stator blade 22 are arranged in a radial direction to form a concave part and a convex part, and the ore pulp flow hole 24 is located between the first stator blade 21 and the second stator blade 22 and between the second stator blades 22. The first stator blade 21 and the second stator blade 22 are in a right trapezoidal structure.

[0056] Specifically, the impeller 1 is composed of a top disc 11 and a rotor blade 12. The center position of the top disc 11 is provided with a bolt hole connected to the flange of the flotation machine main shaft 7. The rotor blade 12 is irregularly sawtooth-shaped, the surface is provided with a plurality of small holes, is perpendicular to the plane of the top disc 11, and is uniformly distributed along the circumference at a certain angle.

[0057] The stator 2 is composed of large blades (first stator blades 21), small blades (second stator blades 22) and a bottom disc 23. The first stator blades 21 and the second stator blades 22, which are provided with small holes on the surface, are in a right-angled trapezoidal structure, perpendicular to the plane where the bottom disc 23 is located, and are evenly distributed along the respective circumferences. The bottom disc 23 is provided with pulp flow holes 24 on the surface, which reduces the blocking effect on the flow of the pulp.

[0058] The rotor blades 12 of the impeller 1 and the first stator blades 21 and the second stator blades 22 of the stator 2 are installed in an inlaid manner, forming shearing action on multiple circumferences (3 circumferences in this embodiment) between the rotor blades 12 and the stator 2 blades. The blades with holes on the impeller 1 and the stator 2 further extend the length of the air shearing periphery, reduce the blade area and the particle suspension capacity while improving the air shearing effect, increase the particle suspension critical speed, and thus narrow the difference between the air critical speed and the particle suspension critical speed.

[0059] Embodiment 3

[0060] The air distributor 3 is also included, which is installed at the center of the impeller 1. The air distributor 3 includes a cylinder 31 and a cylinder bottom 32, the cylinder 31 is connected to the cylinder bottom 32, and the surfaces of the cylinder 31 and the cylinder bottom 32 are both provided with small holes for shearing air.

[0061] Specifically, the air distributor 3 is composed of the cylinder 31 and the cylinder bottom 32. The surfaces of the cylinder 31 and the cylinder bottom 32 are both provided with small holes for shearing air. The air distributor 3 as a whole has a small height-diameter ratio shape, which strengthens the dispersion of air in the radial direction.

[0062] Embodiment 4

[0063] The circulating cylinder 4 and the support false bottom 5 are also included, the circulating cylinder 4 is connected below the stator 2, and the support false bottom 5 is connected below the circulating cylinder 4. The circulating cylinder 4 includes an upper circular ring 41, a cylinder 43 and a lower circular ring 45, the upper circular ring 41 and the lower circular ring 45 are respectively arranged at the upper and lower ends of the cylinder 43, and the upper circular ring 41 is connected with the bottom disc 23 of the stator 2; the support false bottom 5 includes a top circular ring 51 and a support leg 52, and the top circular ring 51 is connected with the lower circular ring 45.

[0064] Specifically, the circulating cylinder 4 is located directly below the stator 2, and the upper edge of the circulating cylinder 4 is connected with the lower edge of the stator 2. The support false bottom 5 is located directly below the circulating cylinder 4, and the upper edge of the support false bottom 5 is connected with the lower edge of the circulating cylinder 4. The circulating cylinder 4 is composed of an upper circular ring 41, a large rib plate 42, a cylinder 43, a small rib plate 44 and a lower circular ring 45. The upper circular ring 41 and the lower circular ring 45 are arranged at the upper and lower ends of the cylinder 43 respectively, and are fixed by the rib plate and the reinforcement. The surface of the upper disc is provided with a bolt hole 46 for connecting with the bottom disc 23 of the stator 2. The support false bottom 5 is composed of a top circular ring 51 and a supporting leg 52. The surface of the top circular ring 51 is provided with a bolt hole 53 for connecting with the lower circular ring 45 of the circulating cylinder 4.

[0065] The space surrounded by the support false bottom 5 and the circulating cylinder 4 increases the local flow rate of the ore pulp, concentrates the suction energy of the bottom of the impeller 1, increases the local flow rate of the ore pulp, so that the impeller 1 can lift the mineral particles to a higher position, shortens the axial movement distance of the mineralized bubbles in the high-concentration ore pulp, reduces the negative influence of the viscous resistance of the high-concentration ore pulp on the rising mineralized bubbles, thereby improving the high-concentration flotation efficiency.

[0066] The implementation process of the present application is as follows:

[0067] The ore pulp enters from the lower part of the flotation machine tank body 6, and the air 9 enters the flotation machine tank body 6 through the air distributor 3 of the flotation machine main shaft 7. The impeller 1 rotates under the drive of the flotation machine main shaft 7, and the ore pulp 10 and the air 9 entering the flotation machine are fully mixed by the rotor blade 12, and then are radially thrown out under the flow stabilizing action of the first stator blade 21 and the second stator blade 22 of the stator 2. The thrown-out ore pulp is reflected by the wall surface of the flotation machine tank body 6, a part of the ore pulp is sucked by the bottom of the impeller 1, and then forms a bottom circulation in the space surrounded by the flotation machine tank body 6, the support false bottom 5 and the circulating cylinder 4, and another part of the ore pulp is transported upward by the upper edge of the impeller 1. In this process, the air is sheared into small bubbles and collides with the mineral particles to form mineralized bubbles. The mineralized bubbles rise to form a foaming product (flotation concentrate), and the mineral particles that do not collide and adhere to the bubbles are discharged from the flotation machine tank body 6 as tailings.

[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-concentration flotation machine impeller-stator system, characterized in that, It includes a flotation tank, an impeller, and a stator, wherein the impeller and the stator are disposed in the flotation tank, and the impeller is connected to the main shaft of the flotation machine; The impeller and the stator each have a concave portion and a convex portion, and the convex and concave portions of the impeller and the stator are fitted together in a recessed-convex interlocking manner.

2. The impeller-stator system of the high-concentration flotation machine according to claim 1, characterized in that, The impeller includes a top disk and rotor blades. The top disk is connected to the main shaft of the flotation machine, and a plurality of rotor blades are distributed circumferentially and connected to the bottom of the disk.

3. The impeller-stator system of the high-concentration flotation machine according to claim 2, characterized in that, The blades are serrated and have multiple small holes on their surface.

4. The impeller-stator system of the high-concentration flotation machine according to claim 1, characterized in that, The stator includes a bottom disk and stator blades, with multiple stator blades distributed circumferentially and connected to the top of the bottom disk. The bottom disk is provided with slurry flow holes.

5. The impeller-stator system of the high-concentration flotation machine according to claim 4, characterized in that, The stator blade includes a first stator blade and a second stator blade. The first stator blade and the second stator blade are radially spaced to form a concave portion and a convex portion. The slurry flow hole is located between the first stator blade and the second stator blade, and between the second stator blades.

6. The impeller-stator system of the high-concentration flotation machine according to claim 5, characterized in that, The first stator blade and the second stator blade have a right-angled trapezoidal structure.

7. The impeller-stator system of the high-concentration flotation machine according to claim 1, characterized in that, It also includes an air distributor, which is mounted at the center of the impeller.

8. The impeller-stator system of the high-concentration flotation machine according to claim 7, characterized in that, The air distributor includes a cylinder and a bottom, the cylinder being connected to the bottom, and both the cylinder and the bottom having small holes for shearing air.

9. The impeller-stator system of the high-concentration flotation machine according to claim 1, characterized in that, It also includes a circulation cylinder and a supporting dummy bottom, wherein the circulation cylinder is connected to the lower part of the stator and the supporting dummy bottom is connected to the lower part of the circulation cylinder.

10. The impeller-stator system of the high-concentration flotation machine according to claim 9, characterized in that, The circulating cylinder includes an upper ring, a cylinder, and a lower ring. The upper ring and the lower ring are respectively disposed at the upper and lower ends of the cylinder, and the upper ring is connected to the bottom disk of the stator. The supporting false bottom includes a top ring and legs, with the top ring connected to the lower ring.

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