Mineral powder size grading device
The particle size grading of iron tailings is achieved by using the difference in centrifugal force through the material throwing unit and the separation unit, which solves the problems of complex structure and high maintenance costs in the prior art, and achieves efficient particle-level separation effect.
Patent Information
- Application Number
- CN202510878767.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-08-19
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, the iron tailings screening device has a complex structure and high operating and maintenance requirements, resulting in high costs and making it difficult to efficiently achieve particle size grading.
The material throwing unit and separation unit are used to drive the material throwing barrel by driving the motor, sprocket and chain, so that the iron tailings are subjected to centrifugal force in the air, achieving spatial separation of coarse and fine particles, and separating the ore powder to different sand silos by using the difference in centrifugal force.
It realizes the particle-level separation effect with a simple structure and low cost, achieving separation accuracy that even exceeds traditional equipment, and reducing operating costs.
Smart Images
Figure CN120502502A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of sand throwing machines, in particular to a mineral powder particle size classification device. Background Art
[0002] In recent years, with the continuous development of mining and beneficiation technologies and the increasing demand for steel, a large amount of industrial solid waste, such as iron ore tailings, has been generated. The large-scale storage of iron ore tailings not only wastes resources but also occupies significant amounts of land, damages forests, landforms, vegetation, and natural landscapes, leads to soil erosion, changes in the ecological environment, and poses potential risks such as mudslides, landslides, and dam collapses. Overseas, developed countries have long established waste-free mines as their development goal, and consider the comprehensive utilization technology and development level of tailings as important indicators of a country's scientific and technological level and economic development. Currently, there are three main areas of iron ore tailings reuse in my country: re-selection and recovery of valuable elements from iron ore tailings; production of building materials from iron ore tailings; and filling foundations, roadbeds, and goafs with iron ore tailings.
[0003] The first prerequisite for the reuse of iron tailings is to separate the iron tailings according to a certain particle size and determine the direction of its reuse based on the physical and chemical properties of the tailings.
[0004] Currently, the mining industry typically uses circular vibrating screens and linear screens to screen iron tailings. However, these two screening devices are complex in structure and require high quality maintenance. They are also expensive and uneconomical for the particle size classification needs of low-value products such as iron tailings. Summary of the Invention
[0005] The present invention provides a mineral powder particle size grading device, comprising a base and a sorting structure, a sorting structure is provided on the top of the base, the sorting structure comprises a throwing unit and a separation unit, the throwing unit comprises a throwing rack, a feeding bin, two bearing seats, a rotating shaft, a throwing barrel, multiple throwing plates, a throwing motor, two sprockets and a chain, the throwing rack is fixedly arranged on the top of the base, the feeding bin is fixedly connected to the throwing rack, the two bearing seats are respectively fixedly arranged on the left and right sides of the top of the throwing rack, the rotating shaft is respectively connected to the two bearing seats, the throwing barrel is fixedly arranged on the rotating shaft, multiple throwing plates are fixedly arranged on the throwing barrel, the throwing motor is fixedly arranged on the top of the base, the two sprockets are respectively arranged at the driving end of the throwing motor and one end of the rotating shaft, and the two sprockets are connected by a chain.
[0006] Preferably, the sorting unit includes a sorting bin and two belt conveyors. The sorting bin is fixedly arranged on the top of the base, and an inlet is opened on the left side of the sorting bin. A fine sand chamber and a coarse sand chamber are respectively provided in the sorting bin. The two belt conveyors are fixedly arranged on the top of the base, and the two belt conveyors are respectively located at the outlets of the fine sand chamber and the coarse sand chamber.
[0007] Preferably, a dust reduction unit is provided in the sorting bin.
[0008] Preferably, the dust reduction unit includes a water spray pipe, multiple atomizing nozzles, a water pump, a water supply pipe, a driving motor, a first gear and a second gear. The two ends of the water spray pipe are respectively rotatably connected to the left and right sides of the sorting bin. The water spray pipe is provided with multiple atomizing nozzles. The water pump is located on the right side outside the sorting bin. One end of the water supply pipe is fixedly connected to the drain outlet of the water pump, and the other end of the water supply pipe is connected to one end of the water spray pipe through a sealed bearing. The driving motor is fixedly arranged on the right side outside the sorting bin. The first gear is fixedly arranged at the driving end of the driving motor, and the second gear is fixedly arranged on the outer wall of the water spray pipe.
[0009] Preferably, a buffer unit is provided at the discharge port of the fine sand bin and the coarse sand bin.
[0010] Preferably, the buffer unit includes a buffer box and a plurality of buffer plates. The buffer box is fixedly arranged at the discharge port of the fine sand bin, and the top and bottom of the buffer box are provided with discharge ports. The plurality of buffer plates are arranged on the left and right sides of the buffer box in a staggered, alternating and symmetrical manner.
[0011] The present invention provides a mineral powder particle size classification device through improvement. Compared with the prior art, it has the following improvements and advantages: after the iron tailings of the present invention enters the throwing rack through the hopper, the throwing roller is driven by the driving motor, sprocket and chain to give it an angular velocity, so that it is subjected to the centrifugal force related to the particle size in the air, thereby achieving spatial separation of coarse and fine particle sizes. The larger particle size falls into the farther coarse sand bin due to the greater centrifugal force, and the smaller particle size falls into the closer fine sand bin due to the smaller centrifugal force, and is then transported to the designated location by their respective belt conveyors. This process has a simple structure and low operating cost. It does not require a complex control system or high-energy consumption equipment, but can achieve excellent particle size separation effect, reaching or even exceeding the separation accuracy that can be achieved by traditional complex equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0013] Figure 1 This is a schematic diagram of the main structure of the present invention;
[0014] Figure 2 Schematic diagram of the side view of the throwing unit of the present invention;
[0015] Figure 3 This is a schematic diagram of the main structure of the throwing motor, sprocket and chain of the present invention;
[0016] Figure 4 for Figure 1 A schematic diagram of the enlarged structure of position A;
[0017] Figure 5 This is a schematic diagram of the main structure of the buffer box of the present invention.
[0018] Description of reference numerals:
[0019] 1. Base; 2. Throwing rack; 3. Feed bin; 4. Bearing seat; 5. Rotating shaft; 6. Throwing barrel; 7. Throwing plate; 8. Throwing motor; 9. Sprocket; 10. Chain; 11. Sorting bin; 11-1. Fine sand bin; 11-2. Coarse sand bin; 12. Belt conveyor; 13. Water spray pipe; 14. Atomizing nozzle; 15. Water pump; 16. Water supply pipe; 17. Drive motor; 18. First gear; 19. Second gear; 20. Buffer box; 21. Buffer plate. DETAILED DESCRIPTION
[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.
[0022] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0023] See also Figure 1-5 The present invention provides a technical solution: a mineral powder particle size classification device, comprising a base 1 and a sorting structure, a sorting structure is provided on the top of the base 1, the sorting structure includes a throwing unit and a separation unit, the throwing unit includes a throwing rack 2, a feeding bin 3, two bearing seats 4, a rotating shaft 5, a throwing drum 6, a throwing motor 8, two sprockets 9 and a chain 10, the throwing rack 2 is fixedly arranged on the top of the base 1, the feeding bin 3 is fixedly connected to the throwing rack 2, the two bearing seats 4 are respectively fixedly arranged on the left and right sides of the top of the throwing rack 2, the rotating shaft 5 is respectively connected to the two bearing seats 4, the throwing drum 6 is fixedly arranged on the rotating shaft 5, and a plurality of throwing plates 7 are fixedly arranged on the throwing drum 6, the throwing motor 8 is fixedly arranged on the top of the base 1, the two sprockets 9 are respectively arranged at the driving end of the throwing motor 8 and one end of the rotating shaft 5, and the two sprockets 9 are connected by a chain 10.
[0024] Specifically, the sorting unit includes a sorting bin 11 and two belt conveyors 12. The sorting bin 11 is fixedly arranged on the top of the base 1, and an inlet is opened on the left side of the sorting bin 11. The sorting bin 11 is respectively provided with a fine sand chamber and a coarse sand chamber. The two belt conveyors 12 are fixedly arranged on the top of the base 1, and the two belt conveyors 12 are respectively located at the outlets of the fine sand chamber and the coarse sand chamber.
[0025] The present invention mainly realizes particle size differentiation by using the different centrifugal forces on materials with different particle sizes. Figure 1 Iron tailings with different particle sizes have different masses. The larger the particle size, the greater the mass. According to the centrifugal force principle: F = Mω2r, under the same motion radius and angular velocity, the greater the mass, the greater the centrifugal force, and the greater the throwing distance. The throwing plate 7 is composed of a steel plate with a length of 2m and a width of 0.2m. The throwing cylinder 6 has a diameter of 660mm and a length of 2m.
[0026] Iron tailings of different particle sizes slide into the throwing rack 2 of the present invention through the silo, and then the driving end of the throwing motor 8 drives one of the sprockets 9 to rotate. Under the transmission of the chain 10, the other sprocket 9 drives the rotating shaft 5 to rotate, and the throwing cylinder 6 and the throwing plate 7 run accordingly, giving the iron tailings in the silo an angular velocity that can be thrown up, and the iron tailings are thrown into the air. The centrifugal forces on iron tailings of different particle sizes are different. Among them, the iron tailings of larger particle sizes have a large mass and a large centrifugal force. After being thrown up, they eventually fall into the coarse sand bin 11-2 farther from the silo, and are transported to the designated location with the corresponding belt conveyor 12; the iron tailings of smaller particle sizes have a small mass and a small centrifugal force. After being thrown up, they eventually fall into the fine sand bin 11-1 closer to the silo, and are transported to the designated location with the corresponding belt conveyor 12. Iron tailings of different particle sizes are separated into coarse and fine particle sizes through the above process.
[0027] Specifically, a dust reduction unit is provided in the sorting bin 11, and the dust reduction unit is used to spray water to reduce the dust generated when throwing the materials.
[0028] Specifically, the dust reduction unit includes a water spray pipe 13, multiple atomizing nozzles 14, a water pump 15, a water supply pipe 16, a drive motor 17, a first gear 18 and a second gear 19. The two ends of the water spray pipe 13 are rotatably connected to the left and right sides of the sorting bin 11 respectively. The left end of the water spray pipe 13 is a closed structure, and the right end of the water spray pipe 13 is an open structure. A plurality of atomizing nozzles 14 are provided on the water spray pipe 13. The water pump 15 is located on the right side outside the sorting bin 11. One end of the water supply pipe 16 is fixedly connected to the drain outlet of the water pump 15, and the other end of the water supply pipe 16 is connected to one end of the water spray pipe 13 through a sealed bearing. The sealed bearing not only ensures that the water spray pipe 13 can be The rotation inside the water supply pipe 16 also ensures the sealing between the water spray pipe 13 and the water supply pipe 16. The water pump 15 can bring external water into the water spray pipe 13 through the water supply pipe 16, and then spray it out by the atomizing nozzle 14. The driving motor 17 is fixedly arranged on the right side outside the sorting bin 11, the first gear 18 is fixedly arranged on the driving end of the driving motor 17, and the second gear 19 is fixedly arranged on the outer wall of the water spray pipe 13. The driving end of the driving motor 17 can drive the first gear 18 to rotate, and the first gear 18 can drive the second gear 19 and the water spray pipe 13 to rotate back and forth, thereby increasing the water spraying area of the atomizing nozzle 14, thereby improving the comprehensiveness of dust reduction.
[0029] Specifically, buffer units are provided at the discharge ports of the fine sand bin 11 - 1 and the coarse sand bin 11 - 2 , which can buffer the fine sand and the coarse sand to prevent them from impacting the belt conveyor 12 and causing damage.
[0030] Specifically, the buffer unit includes a buffer box 20 and multiple buffer plates 21. The buffer box 20 is fixed at the discharge port of the fine sand bin 11-1, and discharge ports are opened at the top and bottom of the buffer box 20. Multiple buffer plates 21 are arranged on the left and right sides of the buffer box 20 in a staggered, alternating and symmetrical manner.
[0031] Multiple buffer plates 21 are symmetrically arranged on the left and right sides of the buffer box 20 in an alternating, staggered pattern, creating a unique material flow path. This design effectively disperses the impact force of the material. When fine sand falls from the fine sand bin 11-1 into the buffer box 20, the buffer plates 21 slow the material's fall, preventing direct impact on the belt conveyor 12 and thus extending the equipment's service life.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A mineral powder particle size classification device, characterized in that: The invention comprises a base (1) and a sorting structure, wherein the top of the base (1) is provided with a sorting structure, wherein the sorting structure comprises a throwing unit and a separation unit, wherein the throwing unit comprises a throwing rack (2), a feeding bin (3), two bearing seats (4), a rotating shaft (5), a throwing cylinder (6), a plurality of throwing plates (7), a throwing motor (8), two sprockets (9) and a chain (10), wherein the throwing rack (2) is fixedly provided on the top of the base (1), the feeding bin (3) is fixedly connected to the throwing rack (2), and the two The bearing seats (4) are respectively fixedly arranged on the left and right sides of the top of the throwing frame (2); the rotating shaft (5) is respectively connected to the two bearing seats (4); the throwing cylinder (6) is fixedly arranged on the rotating shaft (5); a plurality of throwing plates (7) are fixedly arranged on the throwing cylinder (6); the throwing motor (8) is fixedly arranged on the top of the base (1); the two sprockets (9) are respectively arranged on the driving end of the throwing motor (8) and one end of the rotating shaft (5); and the two sprockets (9) are connected by a chain (10).
2. A mineral powder particle size classification device according to claim 1, characterized in that: The sorting unit comprises a sorting bin (11) and two belt conveyors (12); the sorting bin (11) is fixedly arranged on the top of the base (1), and a material inlet is opened on the left side of the sorting bin (11); a fine sand cavity and a coarse sand cavity are respectively arranged in the sorting bin (11); the two belt conveyors (12) are fixedly arranged on the top of the base (1), and the two belt conveyors (12) are respectively located at the material outlets of the fine sand cavity and the coarse sand cavity.
3. A mineral powder particle size classification device according to claim 2, characterized in that: A dust reduction unit is provided in the sorting bin (11).
4. The mineral powder particle size classification device according to claim 3, characterized in that: The dust reduction unit comprises a water spray pipe (13), a plurality of atomizing nozzles (14), a water pump (15), a water supply pipe (16), a driving motor (17), a first gear (18) and a second gear (19); the two ends of the water spray pipe (13) are rotatably connected to the left and right sides of the sorting bin (11) respectively; the water spray pipe (13) is provided with a plurality of atomizing nozzles (14); the water pump (15) is located on the right side outside the sorting bin (11); one end of the water supply pipe (16) is fixedly connected to the drain outlet of the water pump (15); and the other end of the water supply pipe (16) is connected to one end of the water spray pipe (13) through a sealed bearing; the driving motor (17) is fixedly arranged on the right side outside the sorting bin (11); the first gear (18) is fixedly arranged on the driving end of the driving motor (17); and the second gear (19) is fixedly arranged on the outer wall of the water spray pipe (13).
5. The mineral powder particle size classification device according to claim 4, characterized in that: Buffer units are provided at the discharge ports of the fine sand bin (11-1) and the coarse sand bin (11-2).
6. The mineral powder particle size classification device according to claim 5, characterized in that: The buffer unit comprises a buffer box (20) and a plurality of buffer plates (21); the buffer box (20) is fixedly arranged at the discharge port of the fine sand bin (11-1), and the top and bottom of the buffer box (20) are both provided with discharge ports; the plurality of buffer plates (21) are arranged on the left and right sides of the buffer box (20) in a staggered, alternating and symmetrical manner.