A sorting device for optimizing sorting effect

Abstract

This invention provides a sorting device for optimizing sorting effects, belonging to the field of magnetic separation technology in mineral processing plants. It includes a crushing section, a sorting section, and a discharge section integrated and installed on the same frame from top to bottom. The frame has an upper platform and a lower platform. The crushing section is installed on the upper platform. The sorting section includes a feeding trough connected to the bottom of the crushing section and sorting units arranged in four directions (front, back, left, and right) around the feeding trough. The feeding trough and the four sorting units are all installed on the lower platform. The discharge section is connected to the bottom of the feeding trough. This invention enables crushing and sorting operations to be performed with a single device, achieving good sorting results, reducing investment and operating costs, and increasing the efficiency of mineral processing plants.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of magnetic separation in a concentrator, and particularly relates to a separation device for optimizing separation effect. BACKGROUND

[0002] At present, since most iron ore species have a certain degree of magnetism, magnetic separation is the most important beneficiation method for iron ore. Magnetite is an iron ore with a large reserve and the most widely used. Magnetite is separated and recovered by a magnetic separator with a small magnetic field strength due to its strong magnetism. Before entering the grinding, the magnetite is generally subjected to three or four stage crushing operations, and each stage of crushing operation is a dissociation of the magnetite, which will regenerate part of the single gangue not containing magnetite. These gangues should be selected and tailing to reduce the amount of ore entering the grinding operation, reduce the energy consumption and equipment investment of the grinding operation, and thus improve the economic benefit of the concentrator.

[0003] The current crushing equipment can be divided into two categories according to the discharge mode, one is the circular ring periphery type discharge, and this type of equipment is mainly rotary crushing and cone crushing machine; the other is the strip type discharge crusher, such as jaw crusher, single-tooth roller crusher, double-tooth roller crusher and high-pressure roller mill. The length and width direction of the strip type discharge crusher can be up to 300-1000 mm, and the magnetic field gradient of the general separation equipment is large, the farther from the surface of the magnetic system, the lower the magnetic field strength, so that the single magnetic system is used for separation from a single direction. The thickness of the material flow often exceeds the effective separation depth of the magnetic system, resulting in the loss of part of the magnetic iron and the reduction of the recovery rate of the magnetic iron, which deteriorates the separation effect. And the current crushing and separation operations use a crusher and a separation belt conveyor respectively, which requires two stages of operation and the construction of a crushing workshop and a separation workshop, resulting in a large number of equipment, high equipment purchase and capital investment, and high operation and maintenance cost. SUMMARY

[0004] In order to overcome the deficiencies in the prior art, the application provides a separation device for optimizing separation effect, which can realize crushing and separation operation by using one equipment, has good separation effect, can reduce investment and operation cost, and increase the benefit of the concentrator.

[0005] The technical scheme adopted by the application to solve the technical problem is: a separation device for optimizing separation effect, comprising a crushing part, a separation part and a discharge part which are integrated and installed on the same rack from top to bottom; the rack has an upper platform and a lower platform, the crushing part is installed on the upper platform, the separation part comprises a feeding chute connected below the crushing part and four separation units arranged in front of, behind and left and right of the feeding chute; the feeding chute and the four separation units are installed on the lower platform; and the discharge part is connected below the feeding chute.

[0006] As a further embodiment of the present invention, the four sorting units have the same structure. The left and right sorting units are arranged in a mirror symmetrical manner with respect to the left and right longitudinal center planes of the material flow, and the front and rear sorting units are arranged in a mirror symmetrical manner with respect to the front and rear longitudinal center planes of the material flow.

[0007] As a further embodiment of the present invention, each sorting unit includes a sorting plate, a redirecting roller a, a redirecting roller b, a drive roller, a conveyor belt, and a drive motor; the sorting plate is welded to the inner side of the side plate of the feeding trough through the lugs at both ends; redirecting roller a and redirecting roller b are respectively provided on the upper and lower sides of the outer side of the sorting plate, and redirecting roller a and redirecting roller b are installed on the side plate of the feeding trough; the drive roller is located outside the feeding trough and is installed on the lower platform through a base; the drive motor is built into the drive roller to drive the drive roller to rotate; the conveyor belt is sequentially wrapped around the drive roller, redirecting roller b, sorting plate, and redirecting roller a.

[0008] As a further embodiment of the present invention, the height of the side plate of the feeding trough is 1.2-1.4 times the height of the sorting plate, the sorting plates of the four sorting units are all located on the outside of the material flow, and the width of each sorting plate is 1.1-1.2 times the width of the material flow it faces.

[0009] As a further embodiment of the present invention, the sorting plate is composed of a vertical plate and a folded plate welded to the bottom of the vertical plate at an obtuse angle to the outside. The redirecting roller a is located above the outside of the vertical plate, and the redirecting roller b is located below the outside of the folded plate.

[0010] As a further embodiment of the present invention, the bend angle of the conveyor belt at the redirecting rollers a and b is an obtuse angle, and the section of the conveyor belt from the redirecting rollers a or b to the drive roller is horizontal. The conveying direction of the conveyor belt at the sorting plate is downward conveying in the same direction as the material flow. The surface of the conveyor belt is lined with wear-resistant rubber.

[0011] As a further embodiment of the present invention, the sorting plate is a permanent magnet system with a surface magnetic field strength of 400mT-600mT.

[0012] As a further embodiment of the present invention, the discharge section includes a box body connected to the lower opening of the feeding trough, and each sorting plate is provided with a longitudinal dividing plate connected to the bottom of the box body at the longitudinal position between the sorting plate and the material flow. The four longitudinal dividing plates are welded together to form a tetrahedron. An ore discharge chute is provided at the lower opening between the tetrahedron and the four side walls of the box body, and a waste rock discharge chute is provided at the lower opening inside the tetrahedron.

[0013] As a further embodiment of the present invention, the drive motor is a variable frequency motor and is connected to the control box.

[0014] As a further embodiment of the present invention, the crushing part adopts a crusher structure, including a crushing host and a transmission part connected to each other. The crushing host and the transmission part are installed on the upper platform through a base. The crusher discharge hopper at the bottom of the crushing host passes through the upper platform and connects downward to the top inlet of the feeding trough.

[0015] The beneficial effects of this invention include:

[0016] 1) The sorting device of the present invention with optimized sorting effect is a single device with a crushing section, a sorting section and a discharge section from top to bottom. It integrates crushing and sorting operations into one device. Compared with the traditional form of crushing and sorting using two devices arranged independently in different workshops, the present invention has fewer devices, less equipment purchase and infrastructure investment, and lower operation and maintenance costs, which can greatly increase the economic benefits of the concentrator.

[0017] 2) The crushing section, sorting section and discharge section share a single frame, thus achieving a high degree of equipment integration and reducing equipment investment compared to their respective independent frames.

[0018] 3) Sorting units are provided on the outer sides of the feed chute in the four directions below the crusher discharge hopper. This enclosed sorting method means that the two sorting units at the front and rear and the two sorting units on the left and right each undertake the sorting of half the thickness of the material flow in the corresponding direction. This reduces the thickness of the material flow by half in all four directions, thereby greatly reducing the attenuation of the sorting magnetic force, thus ensuring the sorting effect, effectively guaranteeing the high recovery rate of the magnetic iron, and optimizing the sorting effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention in one direction;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention from another direction;

[0021] Figure 3 This is an enlarged view of a partial structure of the present invention.

[0022] In the diagram: 1. Frame; 2. Crusher main unit; 3. Transmission unit; 4. Foundation; 5. Upper platform; 6. Feed chute; 7. Crusher discharge hopper; 8. Sorting plate; 9. Idler roller a; 10. Idler roller b; 11. Drive roller; 12. Conveyor belt; 13. Drive motor; 14. Base; 15. Lower platform; 16. Support; 17. Longitudinal dividing plate; 18. Ore discharge chute; 19. Waste rock discharge chute. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] In the description of this invention, it should be noted that the terms "longitudinal," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, "a" and "b" are only used to distinguish components and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example 1

[0027] A sorting device for optimizing sorting effect is provided, applicable to belt discharge crushers. It includes a crushing section, a sorting section, a discharge section, and a frame 1; the frame is divided into an upper platform 5 and a lower platform 15.

[0028] The crushing section adopts a crusher structure, consisting of a main crusher 2 and a transmission section 3. The main crusher 2 and the transmission section 3 are connected in a transmission manner, and both are mounted on a base 4. The base 4 is connected to the upper platform 5 of the frame 1 by bolts.

[0029] The sorting section consists of a feeding trough 6 connected to the flange of the bottom crusher discharge hopper 7 of the crushing host 2 and four sorting units in the front, back, left and right directions. The left and right sorting units are arranged in a mirror symmetrical arrangement with respect to the left and right longitudinal center planes of the material flow, and the front and back sorting units are arranged in a mirror symmetrical arrangement with respect to the front and back longitudinal center planes of the material flow.

[0030] The four sorting units have identical structures, each consisting of a sorting plate 8, a redirecting roller a9, a redirecting roller b10, a drive roller 11, a conveyor belt 12, and a drive motor 13. The base 14 of the drive roller 11 is bolted to the lower platform 15 of the frame 1, and the feeding trough 6 is connected to the lower platform 15 of the frame 1 via supports 16 on its four sides. The drive roller 11 is an electric roller, and the drive motor 13 is built into the drive roller 11. In one embodiment, the drive motors 13 of the four sorting units (front, rear, left, and right) are variable frequency motors and are connected to the control box.

[0031] Four sorting units share a feeding trough 6. The height of the four side plates of the feeding trough 6 is 1.2-1.4 times the height of the sorting plate 8. The four sorting plates 8 are built into the feeding trough 6 and are all located outside the material flow, 100-200mm away from the material flow.

[0032] The sorting plates 8 of the four sorting units are all welded to the inner side of the side plate of the feed trough 6 via lugs at both ends. The width of each sorting plate 8 is 1.1-1.2 times the width of the material flow it faces. The sorting plate 8 is composed of a vertical plate and a folded plate welded to it at 110-130° below the vertical plate. The length of the vertical plate is 500-800mm, and the length of the folded plate is 200-400mm.

[0033] A redirecting roller a9 is provided on the upper outer side of the vertical plate of the four sorting plates 8 in the front, back, left and right directions, and a redirecting roller b10 is provided on the lower outer side of the folding plate. The conveyor belt 12 is sequentially wrapped around the transmission roller 11, the redirecting roller b10, the sorting plate 8, and the redirecting roller a9.

[0034] The bend angle of the conveyor belt 12 at the redirecting rollers a9 and b10 is 110-130°. After passing the redirecting rollers, the section of the conveyor belt to the drive roller 11 is a horizontal section with a length of 1-1.5m. The surface of the conveyor belt 12 is lined with 30mm-80mm of wear-resistant rubber.

[0035] The sorting plate 8 is a permanent magnet system with a surface magnetic field strength of 400mT-600mT. The conveyor belt 12 at the sorting plate 8 conveys downwards in the same direction as the material flow.

[0036] The discharge section is a box-shaped structure connected to the feeding trough 6 via a flange. The upper opening of the discharge section box is welded to the lower opening of the feeding trough 6 on all four sides. Inside the box, a longitudinal dividing plate 17 is provided at the longitudinal position between each sorting plate 8 and the material flow. The four longitudinal dividing plates 17 are welded together to form a tetrahedron. An outer ring ore discharge chute 18 is provided at the lower opening between the tetrahedron and the four side walls of the box, and a waste rock discharge chute 19 is provided at the lower opening of the inner side of the tetrahedron.

[0037] In the above implementation scheme, the width of the sorting plates 8 in the four sorting units (front, back, left, and right) is 1.1-1.2 times the width of the material flow they face. This ensures full-size sorting in all directions of the material flow, guaranteeing 100% material coverage and thus preventing the loss of magnetic materials at the source, ensuring the recovery rate of magnetic iron, and optimizing the sorting effect. The sorting section uses sorting plates 8, which, compared to traditional sorting rollers, has a simpler structure, lighter weight, and lower investment.

[0038] The magnetic field strength of the sorting plate 8 is 400mT-600mT. The strong field strength ensures the full recovery of the magnetically separated minerals, thereby greatly reducing the loss of magnetic iron during sorting at the source.

[0039] By covering the sorting plate 8 with a conveyor belt 12, magnetic ore is adsorbed in the vertical section of the sorting plate 8. The magnetic ore is turned from vertical to near horizontal by a 110-130° bend. Then, it is transported to the back of the bend by the conveyor belt 12 and unloaded to one side of the ore discharge chute 18 under the action of single inertia. This method realizes the adsorption-turning-unloading of ore. The structure is simple and practical and the manufacturing cost is low.

[0040] The conveyor belt 12 is redirected on both the upper and lower sides of the sorting plate 8 by redirecting rollers a9 and b10. This roller redirection method is beneficial for energy saving and reducing wear on the conveyor belt 12. The conveyor belt 12 is relatively short, thus eliminating the need for intermediate supports and idlers, and reducing manufacturing costs.

[0041] The drive motor 13 of the sorting section can be frequency-controlled to adjust the belt speed of the conveyor belt 12, thereby adjusting the inertial kinetic energy of the magnetic ore during unloading, changing the unloading trajectory of the magnetic ore, and thus adjusting the material ratio on both sides of the longitudinal dividing plate 17 to maximize the recovery rate of magnetic iron in the sorting concentrate and optimize the sorting indicators.

Claims

1. A sorting device that optimizes the sorting effect, characterized in that, The crusher, the sorting part and the discharge part are integrally installed on the same rack (1) from top to bottom; the rack (1) has an upper platform (5) and a lower platform (15); the crusher is installed on the upper platform (5); the sorting part comprises a feeding chute (6) connected to the lower part of the crusher and four sorting units arranged in front of, behind, left and right of the feeding chute (6); the feeding chute (6) and the four sorting units are installed on the lower platform (15); the discharge part is connected to the lower part of the feeding chute (6); The four sorting units are identical in structure; the left and right two sorting units are arranged in mirror image symmetry with the left and right longitudinal center planes of the material flow; the front and back two sorting units are arranged in mirror image symmetry with the front and back longitudinal center planes of the material flow; Each sorting unit comprises a sorting plate (8), a redirection roller a (9), a redirection roller b (10), a transmission roller (11), a conveyor belt (12) and a transmission motor (13); the sorting plate (8) is welded to the inner side of the side plate of the feeding chute (6) through the hanging ears at both ends thereof; the outer side of the sorting plate (8) is respectively provided with the redirection roller a (9) and the redirection roller b (10) above and below; the redirection roller a (9) and the redirection roller b (10) are installed on the side plate of the feeding chute (6); the transmission roller (11) is arranged outside the feeding chute (6) and is installed on the lower platform (15) through a base (14); the transmission motor (13) is built in the transmission roller (11) to drive the transmission roller (11) to rotate; the conveyor belt (12) is sequentially sleeved on the transmission roller (11), the redirection roller b (10), the sorting plate (8) and the redirection roller a (9); The sorting plate (8) is composed of a vertical plate and a folded plate welded to the bottom of the vertical plate at an obtuse angle to the outside; the redirection roller a (9) is arranged above the outer side of the vertical plate; the redirection roller b (10) is arranged below the outer side of the folded plate; The bending angle of the conveyor belt (12) at the redirection roller a (9) and the redirection roller b (10) is an obtuse angle; the conveyor belt (12) is a horizontal section after passing over the redirection roller a (9) or the redirection roller b (10) to the transmission roller (11); the conveying direction of the conveyor belt (12) at the sorting plate (8) is downward conveying consistent with the material flow; the surface of the conveyor belt (12) is lined with wear-resistant rubber.

2. A sorting device for optimizing sorting effect according to claim 1, characterized in that, The height of the side plate of the feeding chute (6) is 1.2-1.4 times the height of the sorting plate (8); the sorting plates (8) of the four sorting units are located on the outside of the material flow; the width of each sorting plate (8) is 1.1-1.2 times the width of the material flow facing it.

3. A sorting device for optimizing sorting effect according to claim 1, characterized in that, The sorting plate (8) is a permanent magnet magnetic system with a surface magnetic field strength of 400mT-600mT.

4. The sorting device of claim 1, wherein, The discharge part comprises a box connected to the lower opening of the feeding chute (6); a longitudinal partition plate (17) connected to the inner bottom of the box is arranged between each sorting plate (8) and the material flow; the four longitudinal partition plates (17) are welded to form a tetrahedron; a mineral discharge chute (18) is arranged at the lower opening between the tetrahedron and the four side walls of the box; a waste rock discharge chute (19) is arranged at the lower opening of the inner side of the tetrahedron.

5. The sorting device of claim 1, wherein, The transmission motor (13) is a variable frequency motor connected to a control box.

6. A sorting device for optimizing sorting effect according to claim 1, characterized in that, The crushing part adopts a crusher structure, comprising a crushing main machine (2) and a transmission part (3) connected with each other, the crushing main machine (2) and the transmission part (3) are installed on an upper platform (5) through a base (4), and a crusher discharge hopper (7) at the bottom of the crushing main machine (2) penetrates through the upper platform (5) downward to be connected with a top inlet of a feeding chute (6).

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