Shaking table for ore dressing

Abstract

The shaking table comprises a screening bin, a plurality of screening holes are formed in the bottom of the screening bin, the diameter of each screening hole is divided into a plurality of areas, a plurality of conveying belts are arranged below the screening bin, and the conveying belts are located below the areas of the screening holes respectively. According to the multi-stage ore screening device, ores with different diameters can be screened, multi-stage screening is achieved, the screened ores directly fall into the corresponding conveying belts below the screening bin to be conveyed, the stirring rods rotate towards the screening holes with the small diameters, the ores needing to be screened are pushed towards the screening holes with the small diameters, and the screening efficiency is improved. Small-particle ores stay at the small-diameter screening holes for a long time for multiple times of screening, the situation that screening errors occur when the small-particle ores enter the large screening holes is reduced, and the large-particle ores cross over the upper portion of the stirring rod to reach the next-stage screening hole to be screened; and the ores with larger particles finally fall off from the screening holes with the maximum diameter under the continuous action of the stirring rods to finish screening.

Description

A shaking table for stone ore beneficiation Technical Field

[0001] This utility model relates to the field of stone ore beneficiation technology, and in particular to a shaking table for stone ore beneficiation. Background Technology

[0002] In ore beneficiation, screening by particle size is a core step in optimizing separation efficiency and reducing costs. This operation not only involves the physical basis of mineral liberation but also directly affects the selection of beneficiation methods, energy consumption, and economic benefits. Valuable minerals in ores (such as gold, copper, and apatite) often coexist with gangue minerals (such as quartz and calcite), requiring crushing to liberate the individual minerals. If the particles are too large, the valuable minerals are not fully exposed, leading to a sharp drop in separation efficiency; if the particles are too fine (over-crushed), a large number of microparticles (<10μm) are generated, which are easily carried away by water flow or form non-selective agglomerates, reducing the recovery rate. Therefore, some ore beneficiation processes require particle size screening of the ore.

[0003] Existing shaking tables used for stone ore beneficiation can only perform one-stage screening per screen, resulting in low screening efficiency.

[0004] A multi-stage shaking table for screening ores is disclosed in Chinese patent document CN217368750U. The multi-stage shaking table for screening ores includes a frame, a first bed, a tailings hopper, a support and guiding mechanism, and a concentrate hopper. The first bed is located inside the frame, and a second bed is located inside the frame above the first bed. A third bed is located inside the frame above the second bed. The concentrate hoppers are all installed at the ends of the first, second, and third beds away from the positioning frame. The tailings hoppers are all installed on one side of the first, second, and third beds. The support and guiding mechanism is located on the outer walls of both sides of the frame. Columns are welded to the outer walls of both sides of the frame, and equally spaced support plates are welded to the inner walls of the columns. Rollers are installed inside the wheel grooves. The above-mentioned utility model not only improves the stability and smoothness of the bed movement and the convenience of ore extraction, but also realizes the water storage function, making it more energy-saving and environmentally friendly. However, the ore screening uses a multi-stage screening shaking table with multiple shaking tables for screening, which is complex in structure and consumes a lot of energy for screening with multiple shaking tables.

[0005] To address the shortcomings of the existing technology, providing a shaking table for stone ore beneficiation is a problem worthy of research. Summary of the Invention

[0006] The purpose of this invention is to overcome the drawback of high energy consumption caused by the need for multiple screen beds in multi-stage screening, and to provide a shaking table for stone ore beneficiation that achieves the technical effect of multi-stage screening in a single screening chamber.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A shaking table for stone ore beneficiation includes a screening chamber with a plurality of screening holes at the bottom, the diameter of which is divided into several regions. Several conveyor belts are arranged below the screening chamber, each conveyor belt being located below one of the several regions of the screening holes.

[0009] The screening chamber is a horizontally placed frustum shape, and support legs are fixedly connected to both sides of the screening chamber. The screening chamber is fixedly connected to the support legs, which allows the remaining ore to be concentrated at the end with a larger diameter, making it convenient to collect and recycle the remaining ore.

[0010] The screening holes are all located below the screening chamber. The diameter of the screening holes decreases in several areas to achieve multi-stage screening. The screened ore falls directly into the corresponding conveyor belt below the screening chamber for transport.

[0011] An ore feeding device is installed on the outside of the screening chamber. A feeding pipe is fixedly connected to the ore feeding device. One end of the feeding pipe is connected to the inside of the screening chamber. The end of the feeding pipe faces the side with the smaller diameter of the screening hole, so that the smaller diameter ore is screened first, avoiding the situation where the smaller diameter ore falls directly into the large diameter screening hole and loses its screening value.

[0012] A rotating frame is rotatably connected to one end of the inner wall of the screening chamber. Several agitating rods are fixedly connected to the inner side of the rotating frame. The outer side of the agitating rods is tangent to the inner wall of the screening chamber. A servo motor is fixedly connected to the center of the outer side of the screening chamber. The output end of the servo motor is fixedly connected to the axis of the rotating frame.

[0013] Both the rotating frame and the servo motor are located at the end away from the feeding pipe. The bottom stirring rod rotates towards the smaller diameter screening hole. By setting the servo motor at the end away from the feeding pipe, the rotation of the rotating frame is prevented from interfering with the end of the feeding pipe. This allows the bottom stirring rod to rotate towards the smaller diameter screening hole, pushing the ore to be screened towards the smaller diameter screening hole. This allows the small particles of ore to stay in the smaller diameter screening hole for a longer period of time for multiple screenings, reducing the possibility of small particles of ore entering the larger screening hole and causing screening errors.

[0014] The bottom of one end of the screening chamber has a discharge port, and a sealing plate is rotatably connected to the discharge port. The sealing plate is fixed by a locking buckle to close the discharge port. The discharge port is located at the end of the screening chamber with a larger diameter. After screening in the screening chamber for a long time, some large particles of ore that cannot be screened will accumulate at the end with a larger internal diameter. In this case, the sealing plate needs to be opened to clean the accumulated large particles of ore from the discharge port.

[0015] A guide plate is provided above the rear end of the conveyor belt. The guide plate is tilted, and the bottom height of the guide plate is equal to the top height of the conveyor belt. The top of the guide plate is located behind the screening hole to prevent the ore from falling off the rear end of the conveyor belt and causing waste.

[0016] Positive and beneficial effects:

[0017] 1. This shaking table for stone ore beneficiation has a frustum-shaped screening chamber, which allows the ore to be screened to be tumbled inside the screening chamber for screening. The height of the two ends inside the frustum-shaped screening chamber is not the same, which allows the remaining ore to concentrate at the end with the larger diameter, making it convenient to collect and recycle the remaining ore.

[0018] 2. The shaking table used for stone ore beneficiation has screening holes of different diameters set in different areas at the bottom of the screening chamber, so that the screening chamber can screen ores of different diameters, realize multi-stage screening, and the screened ores fall directly into the corresponding conveyor belt below the screening chamber for transportation.

[0019] 3. This shaking table used for stone ore beneficiation has a stirring rod that rotates towards the smaller diameter screening holes, pushing the ore to be screened towards the smaller diameter screening holes. This allows small particles of ore to remain in the smaller diameter screening holes for a longer period of time for multiple screenings, reducing the possibility of small particles of ore entering the larger screening holes and causing screening errors. Larger particles of ore pass over the stirring rod to reach the next stage of screening. The largest particles of ore eventually fall from the largest diameter screening hole under the continuous action of the stirring rod, completing the screening process. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the structure of this utility model;

[0021] Figure 2 is an enlarged structural schematic diagram of point A in Figure 1 of this utility model;

[0022] Figure 3 is a schematic diagram of the rear view structure of this utility model;

[0023] Figure 4 is a schematic diagram of the front cross-sectional structure of this utility model;

[0024] Figure 5 is an enlarged structural schematic diagram of point B in Figure 4 of this utility model;

[0025] Figure 6 is an enlarged structural schematic diagram of point C in Figure 4 of this utility model;

[0026] Figure 7 is a side sectional view of the present invention.

[0027] Figure 8 is an enlarged structural schematic diagram of point D in Figure 7 of this utility model.

[0028] In the diagram: 1-screening bin, 2-screening hole, 3-conveyor belt, 4-support leg, 5-ore feeding equipment, 6-feeding pipe, 7-rotating frame, 8-stirring rod, 9-servo motor, 10-discharge port, 11-sealing plate, 12-guide plate. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] Example 1

[0031] As shown in Figures 1 to 8, a shaking table for stone ore beneficiation includes a screening chamber 1. The bottom of the screening chamber 1 has several screening holes 2, the diameter of which is divided into several regions. Several conveyor belts 3 are arranged below the screening chamber 1, and the conveyor belts 3 are respectively located below the several regions of the screening holes 2.

[0032] As shown in Figure 1, the screening chamber 1 is a horizontally placed frustum shape. Both sides of the screening chamber 1 are fixedly connected to support legs 4. The screening chamber 1 is fixedly connected to the support legs 4. By setting the screening chamber 1 to a frustum shape, the ore to be screened can be turned over and screened inside the screening chamber 1. The heights of the two ends inside the frustum-shaped screening chamber 1 are not the same, which can make the remaining ore concentrate towards the end with the larger diameter, making it convenient to collect and recycle the remaining ore.

[0033] As shown in Figures 4 to 8, the screening holes 2 are all located below the screening chamber 1. The diameter of the screening holes 2 in several areas decreases sequentially. By setting screening holes 2 with different diameters in different areas at the bottom of the screening chamber 1, the screening chamber can screen ores of different diameters, realize multi-stage screening, and the screened ores fall directly into the corresponding conveyor belt 3 below the screening chamber 1 for transportation.

[0034] As shown in Figures 1 to 8, an ore feeding device 5 is installed on the outside of the screening chamber 1. A feeding pipe 6 is fixedly connected to the ore feeding device 5. One end of the feeding pipe 6 is connected to the inside of the screening chamber 1, and the end of the feeding pipe 6 faces the side with the smaller diameter of the screening hole 2. By connecting the ore feeding device 5 to the screening chamber 1, the ore to be screened is directly transported into the screening chamber 1 and oriented towards the side with the smaller diameter of the screening hole 2. The ore with the smaller diameter is screened first to avoid the situation where the ore with the smaller diameter falls directly into the large diameter screening hole 2 and loses its screening value.

[0035] Example 2

[0036] As shown in Figures 4 to 8, a rotating frame 7 is rotatably connected to one end of the inner wall of the screening chamber 1. Several stirring rods 8 are fixedly connected to the inner side of the rotating frame 7. The outer side of the stirring rods 8 is tangent to the inner wall of the screening chamber 1. A servo motor 9 is fixedly connected to the center of the outer side of the screening chamber 1. The output end of the servo motor 9 is fixedly connected to the axis of the rotating frame 7. By setting the stirring rods 8 driven by the servo motor 9 inside the screening chamber 1, the ore in the screening chamber 1 is stirred, thereby accelerating the efficiency of ore screening.

[0037] As shown in Figure 4, the rotating frame 7 and the servo motor 9 are both located at the end away from the feeding pipe 6. The bottom stirring rod 8 rotates towards the smaller diameter screening hole 2. By setting the servo motor 9 at the end away from the feeding pipe 6, the rotation of the rotating frame 7 is prevented from interfering with the end of the feeding pipe 6. This causes the bottom stirring rod 8 to rotate towards the smaller diameter screening hole 2, pushing the ore to be screened towards the smaller diameter screening hole 2. This allows small particles of ore to stay in the smaller diameter screening hole 2 for a longer period of time for multiple screenings, reducing the screening error caused by small particles of ore entering the larger screening hole 2. Larger particles of ore pass over the stirring rod 8 to reach the next level of screening hole 2 for screening. Larger particles of ore eventually fall from the largest diameter screening hole 2 under the continuous action of the stirring rod 8, completing the screening. Ore with a diameter larger than the diameter of all screening holes 2 is retained in the screening chamber 1 to await processing.

[0038] Example 3

[0039] As shown in Figures 1 and 2, a discharge port 10 is provided at the bottom of one end of the screening chamber 1. A sealing plate 11 is rotatably connected to the discharge port 10. The sealing plate 11 is fixed by a locking buckle to close the discharge port 10. The discharge port 10 is located at the end of the screening chamber 1 with a larger diameter. By setting the discharge port 10 at one end of the screening chamber 1, after a long period of screening in the screening chamber 1, some large particles of ore that cannot be screened will accumulate at the end with a larger internal diameter. In this case, the sealing plate 11 needs to be opened to clean the accumulated large particles of ore from the discharge port 10.

[0040] As shown in Figures 4 to 6, a guide plate 12 is provided above the rear end of the conveyor belt 3. The guide plate 12 is in an inclined state, and the bottom height of the guide plate 12 is equal to the top height of the conveyor belt 3. The top of the guide plate 12 is located behind the screening hole 2. By setting the guide plate 12 above the conveyor belt 3, the screened ore is received and guided to fall onto the conveyor belt 3 for transport to the subsequent processing steps, thus avoiding the waste caused by the ore falling off the rear end of the conveyor belt 3.

[0041] The working principle of this utility model is as follows:

[0042] S1. The ore feeding device 5 is connected to the screening chamber 1, which directly transports the ore to be screened into the screening chamber 1 and makes it face the side with the smaller diameter of the screening hole 2, so that the ore with the smaller diameter is screened first.

[0043] S2. The stirring rod 8 rotates towards the smaller diameter screening hole 2, pushing the ore to be screened towards the smaller diameter screening hole 2. This allows the small ore particles to stay in the smaller diameter screening hole 2 for a longer period of time for multiple screenings, reducing the chance of small ore particles entering the larger screening hole 2 and causing screening errors. Meanwhile, the larger ore particles pass over the stirring rod 8 to reach the next stage screening hole 2 for screening. The largest ore particles eventually fall from the largest diameter screening hole 2 under the continuous action of the stirring rod 8, completing the screening process.

[0044] S3. The screened ore falls directly into the conveyor belt 3 below the screening chamber 1 for transport.

[0045] S4. After screening in the screening chamber 1 for a long time, some large particles of ore that cannot be screened will accumulate at the end with the larger internal diameter. In this case, the sealing plate 11 needs to be opened and the accumulated large particles of ore should be cleaned from the discharge port 10.

[0046] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A shaking table for stone ore beneficiation, comprising a screening chamber (1), wherein the bottom of the screening chamber (1) is provided with a plurality of screening holes (2), characterized in that: The diameter of the screening hole (2) is divided into several regions, and several conveyor belts (3) are arranged below the screening chamber (1), with the conveyor belts (3) located below several regions of the screening hole (2).

2. The shaking table for stone ore beneficiation according to claim 1, characterized in that: The screening chamber (1) is a horizontally placed frustum shape. Both sides of the screening chamber (1) are fixedly connected to support legs (4). The screening chamber (1) is fixedly connected to the support legs (4).

3. A shaking table for stone ore beneficiation according to claim 1, characterized in that: The screening holes (2) are all located below the screening chamber (1), and the diameter of the screening holes (2) decreases sequentially in several regions.

4. A shaking table for stone ore beneficiation according to claim 3, characterized in that: An ore feeding device (5) is provided on the outside of the screening chamber (1). A feeding pipe (6) is fixedly connected to the ore feeding device (5). One end of the feeding pipe (6) is connected to the inside of the screening chamber (1), and the end of the feeding pipe (6) faces the side with the smaller diameter of the screening hole (2).

5. A shaking table for stone ore beneficiation according to claim 4, characterized in that: A rotating frame (7) is rotatably connected to one end of the inner wall of the screening chamber (1). Several stirring rods (8) are fixedly connected to the inner side of the rotating frame (7). The outer side of the stirring rods (8) is tangent to the inner wall of the screening chamber (1). A servo motor (9) is fixedly connected to the center of the outer side of the screening chamber (1). The output end of the servo motor (9) is fixedly connected to the axis of the rotating frame (7).

6. A shaking table for stone ore beneficiation according to claim 5, characterized in that: The rotating frame (7) and the servo motor (9) are both located at the end away from the feeding pipe (6), and the bottom stirring rod (8) rotates towards the smaller diameter screening hole (2).

7. A shaking table for stone ore beneficiation according to claim 2, characterized in that: The bottom of one end of the screening chamber (1) is provided with a discharge port (10), and a sealing plate (11) is rotatably connected to the discharge port (10). The sealing plate (11) is fixed by a latch to close the discharge port (10). The discharge port (10) is located at the end of the screening chamber (1) with a larger diameter.

8. A shaking table for stone ore beneficiation according to claim 1, characterized in that: A guide plate (12) is provided above the rear end of the conveyor belt (3). The guide plate (12) is in an inclined state. The bottom height of the guide plate (12) is equal to the top height of the conveyor belt (3). The top of the guide plate (12) is located behind the screening hole (2).

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