A low-grade tin ore beneficiation device based on magnetic separation and flotation

Abstract

The application discloses a low-grade tin ore beneficiation equipment based on magnetic separation and flotation, which comprises a rack, a crushing and magnetic separation device and a flotation machine, the crushing and magnetic separation device is installed on the rack, the crushing and magnetic separation device comprises a roller, a direct-current magnetic attraction assembly, an alternating-current demagnetization assembly, a driving mechanism and a iron collecting groove, the direct-current magnetic attraction assembly and the alternating-current demagnetization assembly are arranged in sequence along the rotating direction of the roller, the iron collecting groove extends into the roller, the iron collecting groove is located below the alternating-current demagnetization assembly, a plurality of grinding balls are arranged in the roller, the diameter of the grinding ball is larger than the width of the discharge port, the direct-current magnetic attraction assembly can adsorb the iron ore in the tin ore material on the inner wall of the roller and cannot adsorb the grinding ball on the inner wall of the roller, and the flotation machine is located at the discharge port. The application has the advantages that the crushing and magnetic separation of the tin ore are completed in the roller, the efficiency of the crushing and magnetic separation of the tin ore is effectively improved, the tin ore beneficiation efficiency is high, and the application is especially suitable for the beneficiation operation of the low-grade tin ore.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ore dressing equipment, and in particular to low-grade tin ore dressing equipment based on magnetic separation and flotation. BACKGROUND

[0002] Tin has the advantages of ductility, stable chemical properties, corrosion resistance and low melting point, and is widely used.

[0003] A kind of low-grade tin ore dressing method using magnetic separation and flotation is disclosed in Chinese patent application file with publication number CN117548225A. The low-grade tin ore dressing method using magnetic separation and flotation includes the following steps: step (1) crushing and grinding the low-grade tin ore, using water as the leaching agent, and separating by wet magnetic separation with a magnetic separator to obtain magnetic minerals and magnetic tailings; step (2) drying the magnetic tailings after magnetic separation, and placing them in a flotation agent for flotation treatment to obtain flotation minerals and flotation tailings; step (3) concentrating the flotation tailings after flotation treatment to obtain concentrated tailings; and step (4) smelting the concentrated tailings to obtain tin metal, sulfide, silicate, oxide and impurities. The combination of magnetic separation and flotation improves the efficiency and recovery rate of ore separation, and the use of water as the leaching liquid in the magnetic separation process reduces costs and does not introduce new impurities. The flotation agent can reduce the surface tension of the tin ore and improve the leaching rate.

[0004] Chinese utility model patent with publication number CN221452923U discloses a jet type flotation machine for coal mine processing, which includes a flotation tank, an occurrence device installed inside the flotation tank, the occurrence device including a jet unit and an air inlet unit, the jet unit being installed inside the flotation tank, the air inlet unit being installed on the back of the flotation tank, the jet unit including a jet pipe, a motor one, a driven wheel, a transmission belt, a transmission wheel, an installation cylinder, a jet head, a jet branch pipe and a bearing, the air inlet unit including a feeding box, a feeding pipe, a longitudinal partition plate, a channel and a gas discharge pipe, a pushing unit being installed inside the flotation tank, the pushing unit including a pushing box, a lifting device, a connecting column and a pushing plate, a discharge unit being installed on the top of the flotation tank, the discharge unit including a motor two, a rotating plate, a foam overflow port and an inclined plate. The occurrence device completes the processing work of the coal mine.

[0005] The tin content in low-grade tin ore is relatively small, and how to improve the ore dressing efficiency of low-grade tin ore has become the key to the tin production rate of low-grade tin ore. The existing technology has the problem of low tin ore dressing efficiency. SUMMARY

[0006] In order to solve the above technical problems, the present application aims to provide a low-grade tin ore beneficiation equipment based on magnetic separation and flotation, which comprises a rack, a crushing and magnetic separation device and a flotation machine, and has the advantage of high tin ore beneficiation efficiency.

[0007] In order to achieve the above-mentioned application purposes, the technical solutions adopted by the present application are as follows:

[0008] The low-grade tin ore beneficiation equipment based on magnetic separation and flotation comprises a rack, a crushing and magnetic separation device and a flotation machine, the crushing and magnetic separation device is installed on the rack, the crushing and magnetic separation device comprises a roller, a direct-current magnetic attraction assembly, an alternating-current demagnetization assembly, a driving mechanism and a iron collecting tank, the roller is rotatably installed on the rack, both ends of the roller are provided with a feeding port and a discharging port, the feeding port is used for placing tin ore materials, the driving mechanism is installed on the rack, the driving mechanism is connected with the roller, the direct-current magnetic attraction assembly and the alternating-current demagnetization assembly are arranged in sequence along the rotation direction of the roller, the alternating-current demagnetization assembly is located above the roller, the iron collecting tank extends into the roller, the iron collecting tank is located below the alternating-current demagnetization assembly, a plurality of grinding balls are arranged in the roller, the diameter of the grinding balls is greater than the width of the discharging port, the direct-current magnetic attraction assembly can attract the iron ore in the tin ore materials to the inner wall of the roller and cannot attract the grinding balls to the inner wall of the roller, and the flotation machine is located at the discharging port.

[0009] Through the above arrangement, the crushing and magnetic separation of the tin ore are completed in the roller, so that the tin ore does not need to be transported between different devices and unloaded on different devices during the crushing and magnetic separation process, the efficiency of the crushing and magnetic separation of the tin ore is effectively improved, the advantage of high tin ore beneficiation efficiency is achieved, and the low-grade tin ore beneficiation operation is especially suitable.

[0010] Preferably, the direct-current magnetic attraction assembly comprises a magnetic attraction support and a plurality of direct-current coils, the magnetic attraction support is fixedly connected with the rack, and the plurality of direct-current coils are installed on the magnetic attraction support.

[0011] Through the above arrangement, the impurities with magnetism can be separated from the tin ore.

[0012] Preferably, the alternating-current demagnetization assembly comprises a demagnetization support, a strong alternating-current coil and a weak alternating-current coil, the demagnetization support is fixedly connected with the rack, the strong alternating-current coil and the weak alternating-current coil are both installed on the demagnetization support, the strong alternating-current coil is located on the side of the weak alternating-current coil close to the direct-current magnetic attraction assembly, the strong alternating-current coil and the weak alternating-current coil are both used for emitting alternating magnetic fields on the side wall of the roller, and the strength of the alternating magnetic field generated by the strong alternating-current coil is greater than the strength of the alternating magnetic field generated by the weak alternating-current coil.

[0013] Through the above arrangement, the function of generating alternating magnetic fields on the side wall of the roller is achieved.

[0014] As preferred, the strong alternating current coil is provided with multiple ones, and the multiple strong alternating current coils are arranged along the axial direction of the roller; the weak alternating current coil is provided with multiple ones, and the multiple weak alternating current coils are arranged along the axial direction of the roller.

[0015] By such an arrangement, the demagnetization of the roller sidewall and the magnetic impurities at different positions can be ensured.

[0016] As preferred, the driving mechanism comprises a first driving member, a driving gear and a driven gear, the first driving member is installed on the frame, the driving gear is rotatably connected with the frame and fixedly connected with the output shaft of the first driving member, and the driven gear is fixedly installed on the roller and engaged with the driving gear.

[0017] By such an arrangement, the function of driving the roller to rotate can be realized.

[0018] As preferred, the iron collecting groove is fixedly installed with a first water spraying pipe and a second water spraying pipe, the first water spraying pipe is located above the iron collecting groove, and the second water spraying pipe is located below the iron collecting groove.

[0019] By such an arrangement, the function of discharging the tin ore in the roller can be realized.

[0020] As preferred, the crushing and magnetic separation device is provided with two, the two crushing and magnetic separation devices are symmetrically arranged, a crushing gap is arranged between the two rollers, the outer wall of the roller is fixedly connected with a crushing convex strip, and the crushing convex strip extends along the axial direction of the roller.

[0021] By such an arrangement, the function of crushing the tin ore can be realized.

[0022] As preferred, the frame is installed with a conveying belt located below the crushing gap, and a storage box is arranged below the output end of the conveying belt.

[0023] By such an arrangement, the crushed tin ore can be conveyed into the storage box as tin ore material for standby.

[0024] As preferred, the storage box is located on the side of the roller close to the feed inlet.

[0025] By such an arrangement, the effect of facilitating the transportation of the tin ore material in the storage box to the feed inlet of the roller can be achieved.

[0026] As preferred, the flotation machine comprises a flotation tank, a scraper, a second driving member and a feeding groove, the flotation tank is open upward, the flotation tank is located below the discharge outlet, the scraper is rotatably connected with the upper end of the flotation tank, the second driving member is installed on the flotation tank and the output shaft thereof is fixedly connected with the scraper, and the feeding groove is fixedly installed on the outer sidewall of the flotation tank.

[0027] Through the setting, the function of the flotation machine for tin ore flotation is realized.

[0028] Compared with the prior art, the application has the beneficial technical effects:

[0029] 1. The magnetic field generated by the direct current coil adsorbs the magnetic impurities in the tin ore powder on the inner wall of the drum. The drum moves the magnetic impurities to the alternating demagnetization assembly through friction during rotation. The alternating magnetic field is generated by the strong alternating current coil and the weak alternating current coil at the magnetic impurities and the drum side wall. The magnetic moment direction of the magnetic domain of the magnetic impurities and the drum is changed by the strong alternating current coil, and then the magnetization intensity of the magnetic impurities and the drum is weakened by the weak alternating current coil, achieving the effect of demagnetizing the magnetic impurities. The magnetic impurities fall from the position close to the alternating demagnetization assembly to the iron collecting tank. The tin ore powder without iron cannot be adsorbed on the drum side wall by the direct current magnetic assembly and continues to tumble at the bottom of the drum, realizing the function of magnetic separation of tin ore.

[0030] 2. The tin ore is crushed and magnetically separated in the drum, so that the tin ore does not need to be transported between different devices and does not need to be loaded and unloaded on different devices during crushing and magnetic separation, effectively improving the efficiency of tin ore crushing and magnetic separation, achieving the advantage of high efficiency of tin ore beneficiation, and being especially suitable for low-grade tin ore beneficiation operation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of a low-grade tin ore beneficiation equipment based on magnetic separation and flotation in an embodiment of the application;

[0032] Figure 2 is a structural schematic view of a conveying belt and a storage box in an embodiment of the application;

[0033] Figure 3 is a sectional view of a drum in an embodiment of the application;

[0034] Figure 4 is a structural schematic view of a direct current magnetic assembly and an alternating current demagnetization assembly in an embodiment of the application.

[0035] Among them, the technical features referred to by each reference sign are as follows:

[0036] 10, rack; 11, crushing and magnetic separation device; 12, roller; 13, feeding port; 14, discharging port; 15, crushing gap; 16, conveying belt; 17, storage box; 18, crushing convex strip; 21, iron collecting groove; 22, first water spraying pipe; 23, second water spraying pipe; 24, baffle; 31, magnetic attraction support; 32, direct current coil; 33, demagnetization support; 34, strong alternating current coil; 35, weak alternating current coil; 41, first driving member; 42, driving gear; 43, driven gear; 51, flotation tank; 52, scraper; 53, second driving member; 54, feeding groove; 61, grinding ball; 62, lead core; 63, wear-resistant layer. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to examples, but the scope of protection of the present application is not limited to the following specific examples.

[0038] REFERENCE Figures 1-4 A low-grade tin ore beneficiation equipment based on magnetic separation and flotation includes a rack 10, a crushing and magnetic separation device 11 and a flotation machine, and the crushing and magnetic separation device 11 is installed on the rack 10.

[0039] The crushing and magnetic separation device 11 includes a roller 12, a direct current magnetic attraction assembly, an alternating current demagnetization assembly, a driving mechanism and an iron collecting groove 21, and the roller 12 is rotatably installed on the rack 10. The driving mechanism is installed on the rack 10 and connected with the roller 12, and the driving mechanism includes a first driving member 41, a driving gear 42 and a driven gear 43. The first driving member 41 is installed on the rack 10, the driving gear 42 is rotatably connected with the rack 10 and fixedly connected with the output shaft of the first driving member 41, and the driven gear 43 is fixedly installed on the roller 12 and engaged with the driving gear 42. The first driving member 41 is a speed reducer, the first driving member 41 drives the roller 12 to rotate on the rack 10 through the driving gear 42 and the driven gear 43, thereby realizing the function that the driving mechanism drives the roller 12 to rotate.

[0040] The two ends of the roller 12 are provided with an inlet 13 for putting in tin ore materials and an outlet 14 for discharging materials. The crushing and magnetic separation device 11 is provided with two crushing and magnetic separation devices 11, and the two crushing and magnetic separation devices 11 are symmetrically arranged. The two rollers 12 are provided with a crushing gap 15, and the outer wall of the roller 12 is fixedly connected with a crushing convex strip 18 which extends along the axial direction of the roller 12. The two crushing and magnetic separation devices 11 simultaneously crush and magnetically separate the tin ore, thereby improving the production efficiency. The rotating directions of the two rollers 12 on the two sides of the crushing gap 15 are opposite, and the side wall of the roller 12 close to the crushing gap 15 is turned downward. The tin ore with a relatively large width is placed on the crushing gap 15, the roller 12 drives the crushing convex strip 18 to crush the tin ore on the crushing gap 15, thereby realizing the function of crushing the tin ore. The rack 10 is provided with a conveying belt 16 located below the crushing gap 15, and the lower side of the output end of the conveying belt 16 is provided with a storage box 17. When the width of the tin ore at the crushing gap 15 is smaller than the width of the crushing gap 15, the tin ore falls onto the conveying belt 16 below the crushing gap 15, and the conveying belt 16 conveys the crushed tin ore into the storage box 17 for standby as tin ore materials. The storage box 17 is located on the side of the roller 12 close to the inlet 13, thereby facilitating the transportation of the tin ore materials in the storage box 17 to the inlet 13 of the roller 12.

[0041] The roller 12 is provided with a plurality of grinding balls 61, and the diameter of the grinding ball 61 is greater than the width of the outlet 14. The grinding ball 61 is provided with a lead core 62 and a wear-resistant layer 63, the lead core 62 is located in the wear-resistant layer 63, the lead core 62 is made of lead, and the wear-resistant layer 63 is made of steel. By setting lead in the grinding ball 61, the attraction of the magnetic field to the grinding ball 61 can be reduced, thereby avoiding that the grinding ball 61 is adsorbed on the side wall of the roller 12 by the direct-current magnetic attraction assembly.

[0042] The direct-current magnetic attraction assembly and the alternating-current demagnetization assembly are arranged in sequence along the rotating direction of the roller 12, the alternating-current demagnetization assembly is located above the roller 12, the iron collecting groove 21 extends into the roller 12, the iron collecting groove 21 is located below the alternating-current demagnetization assembly, the direct-current magnetic attraction assembly adsorbs the iron ore in the tin ore materials on the inner wall of the roller 12 and cannot adsorb the grinding ball 61 on the inner wall of the roller 12, and the flotation machine is located at the outlet 14.

[0043] The direct-current magnetic attraction assembly includes a magnetic attraction support 31 and a plurality of direct-current coils 32, the magnetic attraction support 31 is fixedly connected with the rack 10, and the plurality of direct-current coils 32 are installed on the magnetic attraction support 31. Direct current is supplied to the direct-current coil 32 to generate a magnetic field at the side wall of the roller 12, and the magnetic field generated by the direct-current coil 32 adsorbs the impurities with magnetism on the surface of the roller 12. The impurities with magnetism move with the rotation of the roller 12, thereby separating the impurities with magnetism from the tin ore.

[0044] The alternating current demagnetization assembly comprises a demagnetization support 33, a strong alternating current coil 34 and a weak alternating current coil 35. The demagnetization support 33 is fixedly connected with the rack 10. The strong alternating current coil 34 and the weak alternating current coil 35 are both mounted on the demagnetization support 33. The strong alternating current coil 34 is located on the side of the weak alternating current coil 35 close to the direct current magnetic attraction assembly. The strong alternating current coil 34 and the weak alternating current coil 35 are both used for emitting alternating magnetic fields on the side wall of the drum 12. The alternating magnetic field generated by the strong alternating current coil 34 has a greater strength than the alternating magnetic field generated by the weak alternating current coil 35. The function of generating alternating magnetic fields on the side wall of the drum 12 is realized. A plurality of strong alternating current coils 34 are arranged along the axial direction of the drum 12. A plurality of weak alternating current coils 35 are arranged along the axial direction of the drum 12. The plurality of strong alternating current coils 34 and the plurality of weak alternating current coils 35 are arranged along the axial direction of the drum 12, respectively. Therefore, the plurality of strong alternating current coils 34 and the plurality of weak alternating current coils 35 can cover different positions of the drum 12, so as to ensure that the side wall of the drum 12 and the magnetic impurities at different positions can be demagnetized.

[0045] The first water spraying pipe 22 and the second water spraying pipe 23 are fixedly installed on the iron collecting groove 21. The first water spraying pipe 22 is located above the iron collecting groove 21, and the second water spraying pipe 23 is located below the iron collecting groove 21. The first water spraying pipe 22 and the second water spraying pipe 23 are both in communication with an external water source. The first water spraying pipe 22 sprays water into the iron collecting groove 21, and the magnetic impurities in the iron collecting groove 21 are washed out of the iron collecting groove 21 by the water flow, thereby realizing the function of discharging the impurities in the iron collecting groove 21. When it is necessary to discharge the tin ore in the drum 12, the second water spraying pipe 23 sprays water into the drum 12, and the tin ore is washed out of the drum 12 by the water flow through the discharge port 14, thereby realizing the function of discharging the tin ore in the drum 12.

[0046] The drum 12 is detachably installed with a baffle 24 for blocking the discharge port 14. When the tin ore is crushed and magnetically separated, the baffle 24 is installed on the drum 12, and the tin ore is retained in the drum 12 by the baffle 24. When it is necessary to discharge the tin ore in the drum 12, the baffle 24 is detached from the discharge port 14, so that the tin ore can be discharged from the discharge port 14.

[0047] The flotation machine comprises a flotation groove 51, a scraper 52, a second driving member 53 and a feeding groove 54. The flotation groove 51 is open upward, and the flotation groove 51 is located below the discharge port 14. The scraper 52 is rotatably connected with the upper end of the flotation groove 51. The second driving member 53 is installed on the flotation groove 51 and has an output shaft fixedly connected with the scraper 52. The feeding groove 54 is fixedly installed on the outer side wall of the flotation groove 51. The second driving member 53 is a speed reducer.

[0048] The tin ore material is put into the roller 12 through the feeding port 13, the driving mechanism drives the roller 12 to rotate on the frame 10 at a rotating speed of 30-80 r / min, so that the tin ore material and the grinding ball 61 are tumbled and collided in the roller 12, thereby the tin ore material can be ground by the grinding ball 61 to obtain tin ore powder. Then the driving mechanism drives the roller 12 to rotate on the frame 10 at a rotating speed of 5-20 r / min, and the direct current coil 32, the strong alternating current coil 34 and the weak alternating current coil 35 are respectively connected to the direct current, the strong alternating current and the weak alternating current, and the current of the strong alternating current is greater than that of the weak alternating current, so that the direct current coil 32, the strong alternating current coil 34 and the weak alternating current coil 35 generate magnetic fields respectively. The magnetic field generated by the direct current coil 32 adsorbs the magnetic impurities in the tin ore powder on the inner wall of the roller 12, and the magnetic impurities are driven to move to the alternating demagnetization assembly by the friction force in the rotating process of the roller 12. The alternating magnetic field is generated by the strong alternating current coil 34 and the weak alternating current coil 35 at the magnetic impurities and the side wall of the roller 12 at the magnetic impurities, the magnetic moment direction of the magnetic domain of the magnetic impurities and the magnetic impurities is changed by the strong alternating current coil 34 first, and then the magnetization intensity of the magnetic impurities and the magnetic impurities is weakened by the weak alternating current coil 35, so that the magnetic impurities are demagnetized, the magnetic impurities fall from the position close to the alternating demagnetization assembly to the iron collecting groove 21, and the tin ore powder without iron cannot be adsorbed on the side wall of the roller 12 by the direct current magnetic attraction assembly and continues to tumble at the bottom of the roller 12, so that the function of the magnetic separation of the tin ore is realized. The tin ore powder after the magnetic separation is sent into the flotation machine through the discharge port 14, the tin ore powder is floated by the flotation machine, and the function of the ore dressing of the tin ore is realized.

[0049] The tin ore powder in the roller 12 is discharged into the flotation tank 51 through the discharge port 14, the flotation machine is added in the flotation tank 51, and then the gas is input into the bottom of the flotation tank 51, so that the froth of the flotation agent moves upward, the tin ore can move upward with the froth by using the different hydrophilicity difference between the tin ore and the impurities in the tin ore, and the impurities sink at the bottom of the flotation tank 51, then the scraper 52 is driven to rotate by the second driving member 53, the tin ore moving to the top of the flotation tank 51 with the froth is scraped onto the feeding groove 54 in the rotating process of the scraper 52, so that the tin ore can be discharged through the feeding groove 54, and the function of the flotation of the tin ore by the flotation machine is realized.

[0050] The embodiment has the following advantages:

[0051] The crushing and the magnetic separation of the tin ore are completed in the roller 12, so that the tin ore does not need to be transported between different devices and does not need to be loaded and unloaded on different devices in the crushing and the magnetic separation process, the efficiency of the crushing and the magnetic separation of the tin ore is effectively improved, the advantage that the ore dressing efficiency of the tin ore is high is achieved, and the embodiment is especially suitable for the ore dressing operation of the low-grade tin ore.

[0052] Those skilled in the art can make various modifications and changes to the above embodiments according to the disclosure and teachings herein. Therefore, the application is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the application shall fall within the protection scope of the claims of the application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the application.

Claims

1. A low-grade tin ore beneficiation device based on magnetic separation and flotation, characterized in that: The system includes a frame (10), a crushing and magnetic separation device (11), and a flotation machine. The crushing and magnetic separation device (11) is mounted on the frame (10). The crushing and magnetic separation device (11) includes a drum (12), a DC magnetic attraction assembly, an AC demagnetizing assembly, a drive mechanism, and an iron collection trough (21). The drum (12) is rotatably mounted on the frame (10). The drum (12) has a feed inlet (13) and a discharge outlet (14) at both ends. The feed inlet (13) is used to put in tin ore. The drive mechanism is mounted on the frame (10) and is connected to the drum (12). The DC magnetic attraction component and the AC demagnetizing component are arranged sequentially along the rotation direction of the drum (12). The AC demagnetizing component is located above the drum (12). The iron collecting trough (21) extends into the drum (12). The iron collecting trough (21) is located below the AC demagnetizing component. The drum (12) is equipped with multiple grinding balls (61). The diameter of the grinding balls (61) is larger than the width of the discharge port (14). The DC magnetic attraction component adsorbs the iron ore in the tin ore material onto the inner wall of the drum (12) and cannot adsorb the grinding balls (61) onto the inner wall of the drum (12). The flotation machine is located at the discharge port (14). The AC demagnetizing assembly includes a demagnetizing bracket (33), a strong AC coil (34), and a weak AC coil (35). The demagnetizing bracket (33) is fixedly connected to the frame (10). The strong AC coil (34) and the weak AC coil (35) are both mounted on the demagnetizing bracket (33). The strong AC coil (34) is located on the side of the weak AC coil (35) closer to the DC magnetic attraction assembly. The strong AC coil (34) and the weak AC coil (35) are both used to generate an alternating magnetic field on the side wall of the drum (12). The strength of the alternating magnetic field generated by the strong AC coil (34) is greater than the strength of the alternating magnetic field generated by the weak AC coil (35).

2. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 1, characterized in that: The DC magnetic suction assembly includes a magnetic suction bracket (31) and a plurality of DC coils (32). The magnetic suction bracket (31) is fixedly connected to the frame (10), and the plurality of DC coils (32) are mounted on the magnetic suction bracket (31).

3. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 1, characterized in that: Multiple strong AC coils (34) are provided, and the multiple strong AC coils (34) are arranged along the axial direction of the drum (12). Multiple weak AC coils (35) are provided, and the multiple weak AC coils (35) are arranged along the axial direction of the drum (12).

4. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 1, characterized in that: The drive mechanism includes a first drive member (41), a drive gear (42), and a driven gear (43). The first drive member (41) is mounted on the frame (10). The drive gear (42) is rotatably connected to the frame (10) and fixedly connected to the output shaft of the first drive member (41). The driven gear (43) is fixedly mounted on the drum (12) and meshes with the drive gear (42).

5. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 1, characterized in that: The iron collecting trough (21) is fixedly equipped with a first water spray pipe (22) and a second water spray pipe (23). The first water spray pipe (22) is located above the iron collecting trough (21), and the second water spray pipe (23) is located below the iron collecting trough (21).

6. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 1, characterized in that: Two crushing magnetic separation devices (11) are provided in total. The two crushing magnetic separation devices (11) are arranged symmetrically. A crushing gap (15) is provided between the two drums (12). A crushing protrusion (18) is fixedly connected to the outer wall of the drum (12). The crushing protrusion (18) extends along the axial direction of the drum (12).

7. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 6, characterized in that: The frame (10) is equipped with a conveyor belt (16) located below the crushing gap (15), and a storage box (17) is provided below the output end of the conveyor belt (16).

8. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 7, characterized in that: The storage box (17) is located on the side of the drum (12) near the feed inlet (13).

9. The low-grade tin ore beneficiation equipment based on magnetic separation and flotation according to claim 1, characterized in that: The flotation machine includes a flotation cell (51), a scraper (52), a second drive unit (53), and a feeding trough (54). The flotation cell (51) has an upward opening and is located below the discharge port (14). The scraper (52) is rotatably connected to the upper end of the flotation cell (51). The second drive unit (53) is installed on the flotation cell (51) and its output shaft is fixedly connected to the scraper (52). The feeding trough (54) is fixedly installed on the outer wall of the flotation cell (51).

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