Compressed air washing vibrating screen

Abstract

The present invention discloses a compressed air ore-washing vibrating screen, comprising a fixed frame, a conveying device is arranged in the fixed frame, and a viscous material outlet is arranged at the end of the conveying device; the fixed frame supports a receiving hopper upward, and the conveying device is communicated with the receiving hopper upward; the fixed frame is connected with a box body upward, and the box body is communicated with the receiving hopper downward; a sieve plate is arranged at the bottom of the box body, one end of the box body is connected with a feed port and the other end is connected with a target material discharge port; an exciter is fixedly connected to the outer wall of the box body; a nozzle fixing plate is arranged in the box body above the sieve plate, a main air duct is arranged in the box body above the nozzle fixing plate, and the main air duct is connected with an air inlet duct; a plurality of nozzles are connected to the nozzle fixing plate downward, and the nozzles are evenly distributed on the nozzle fixing plate, and the air outlet direction of each nozzle is perpendicular to the sieve plate and faces the sieve plate; the compressed air ore-washing vibrating screen of the present invention does not need to dry materials and will not cause harm to the environment, and can efficiently separate target materials and viscous materials.

Description

Technical Field

[0001] The invention relates to the technical field of material separation, and in particular to a vibrating screen. Background Art

[0002] Vibrating screens are widely used in the solid particle classification process of various industrial productions. Vibrating screens can usually be divided into circular vibrating screens and rectangular vibrating screens in terms of shape. Circular vibrating screens have a simple structure and are mostly suitable for classifying small flow materials. Rectangular vibrating screens can be made into larger equipment and can handle large flow materials.

[0003] Regardless of the structure of the vibrating screen, its structure includes a box, a screen, an exciter, a vibration spring and a fixed frame. In industrial applications, the factors that affect the working efficiency of the vibrating screen are mainly the properties of the material and the passing capacity of the screen.

[0004] Generally, the passing capacity of sticky materials is poor, and they may even quickly clog the screen, causing the vibrating screen to completely lose its separation function. The structure of the screen and the way it is cleaned also have a significant impact on the efficiency of the vibrating screen. For materials containing clay, it is difficult to separate fine particles at high moisture content.

[0005] In the process of separating the ore and clay of the accumulation type bauxite, the clay is very sticky and can hardly pass through the 3mm (millimeter) screen. Therefore, the mining process of the accumulation type bauxite in Guangxi and Yunnan adopts the wet washing method, which turns the scarce soil in Guangxi into mud and stores it in the abandoned tailing mud reservoir, causing a large amount of environmental desertification and causing serious damage to the natural environment.

[0006] The key drawback of the technical solution for dry separation of sticky materials is that the materials need to be dried, which inevitably consumes a lot of energy and is too costly to be applied.

[0007] The technology of wet separation of sticky materials (such as clay) and target materials (such as bauxite ore, the characteristic of target materials and sticky materials is that the hardness of target materials is higher than that of sticky materials) has been banned due to its negative impact on environmental protection. Therefore, it is necessary to develop a new type of vibrating screen that can separate sticky materials. It can directly support the development of aluminum industry and environmental governance in Guangxi and Yunnan, and is very important for improving the screening efficiency and reducing screening costs of other sticky materials in other regions. Summary of the invention

[0008] The object of the present invention is to provide a compressed air ore washing vibrating screen which does not require drying of materials and does not cause harm to the environment, and can efficiently separate target materials from viscous materials.

[0009] To achieve the above-mentioned purpose, the compressed air ore washing vibrating screen of the present invention comprises a fixed frame, a conveying device for conveying viscous materials is arranged in the fixed frame, and a viscous material outlet is arranged at the end of the conveying device; a receiving hopper is supported and fixed upwardly by the fixed frame, and the conveying device is communicated with the receiving hopper upwardly and receives the viscous materials dropped from the receiving hopper;

[0010] The fixed frame is connected with a box body upwards through a spring, and the box body is connected with the receiving hopper downwards;

[0011] A sieve plate is provided at the bottom of the box, one end of the box above the sieve plate is connected to a feed port and the other end is connected to a target material discharge port; a vibrator is fixedly connected to the outer wall of the box;

[0012] A nozzle fixing plate is provided in the box body above the sieve plate, the nozzle fixing plate is parallel to the sieve plate and connected to the inner wall of the box body; a main air duct is provided in the box body above the nozzle fixing plate, the main air duct is parallel to the nozzle fixing plate; the main air duct is connected to an air inlet pipe, the air inlet pipe extends out of the box body and is connected to an air inlet, and the air inlet is used to connect to a compressed air source;

[0013] A plurality of air nozzles are connected downwardly to the air nozzle fixing plate, and the air nozzles are evenly distributed on the air nozzle fixing plate. The air outlet direction of each air nozzle has an angle of 30°-90° with the screen plate and faces the screen plate; the side wall of the receiving hopper is connected with an air outlet in the middle of the upper and lower directions.

[0014] The openings of the rotary discharging device and the viscous material outlet are both arranged downward; the feeding port is connected with the rotary feeder, and the target material discharging port is connected with the rotary discharging device.

[0015] The receiving hopper and the conveying device are flexibly connected, the feeding port and the rotary feeder are flexibly connected, and the target material discharging port and the rotary discharging device are flexibly connected.

[0016] A plurality of wind shields are evenly spaced in the box between the nozzle fixing plate and the screen plate. Each wind shield is perpendicular to the nozzle fixing plate. There is a gap between the lower end of each wind shield and the screen plate. The direction from the feed port to the target material discharge port is the discharge direction.

[0017] The nozzle fixing plate, the screen plate and each wind shield plate divide the inner space of the box into a plurality of turbulent collision chambers for collision separation along the discharging direction.

[0018] The air nozzle fixing plate is rectangular, and the air nozzles are distributed in a rectangular array.

[0019] The air nozzle fixing plate is circular, and the air nozzles are distributed in rectangular circular rows.

[0020] The angle between the sieve plate and the horizontal plane is 0°-30°.

[0021] The present invention has the following advantages:

[0022] When in use, each air nozzle sprays compressed air toward the screen plate. Even if the sticky material is very sticky, it can be blown off the screen, thereby continuously purifying the screen.

[0023] More importantly, compressed air can disturb the material particles, and the material particles will continuously collide in the turbulent collision chamber. During the collision process, fine particles (mainly sticky material particles) adhering to the target material particles (harder than sticky material) will collide and fall off, thereby obtaining a better separation effect and obtaining cleaner large particles.

[0024] The nozzle fixing plate, the screen plate and the wind shield plates divide the internal space of the box into several turbulent collision chambers for collision separation along the discharge direction, which can greatly prolong the average number and average time of collisions between material particles when passing through the screen plate, thereby improving the material separation effect.

[0025] The material separation space is enclosed in the box and will not cause dust pollution to the outside.

[0026] The invention can not only screen out fine particles of sticky materials, but also purify the surface of large particles with compressed air. In the process of washing ore, the invention can completely replace the wet washing process. There is no need to transport the raw ore containing clay to the washing plant. The clay can be directly separated in the mining area, and the soil can be directly returned to the field. It not only saves costs, but also protects the natural environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic cross-sectional structure diagram of the present invention when the nozzle fixing plate is rectangular;

[0028] Figure 2 is a schematic cross-sectional structural diagram of the present invention when the nozzle fixing plate is circular;

[0029] Figure 3 When the nozzle fixing plate is rectangular Figure 1 A-A view;

[0030] Figure 4 When the nozzle fixing plate is round Figure 2 B-B view. DETAILED DESCRIPTION

[0031] like Figures 1 to 4 As shown, the compressed air ore washing vibrating screen of the present invention comprises a fixed frame 1, a conveying device 2 for conveying viscous materials is arranged inside the fixed frame 1, and a viscous material outlet 3 is arranged at the end of the conveying device 2; a receiving hopper 4 is supported and fixed upwardly by the fixed frame 1, and the conveying device 2 is upwardly connected to the receiving hopper 4 and receives the viscous materials dropped from the receiving hopper 4;

[0032] The conveying device 2 is preferably a screw conveyor.

[0033] The fixed frame 1 is upwardly connected to a box body 6 through a spring 5, and the box body 6 is downwardly connected to a receiving hopper 4;

[0034] A sieve plate 7 is provided at the bottom of the box body 6, one end of the box body 6 above the sieve plate 7 is connected to a feed port 16 and the other end is connected to a target material discharge port; a vibrator 8 is fixedly connected to the outer wall of the box body 6; preferably, multiple vibrators 8 are evenly distributed on the outer wall of the box body 6, such as one at the top and one on each side.

[0035] A nozzle fixing plate 9 is provided in the box body 6 above the sieve plate 7, and the nozzle fixing plate 9 is parallel to the sieve plate 7 and connected to the inner wall of the box body 6; a main air duct 10 is provided in the box body 6 above the nozzle fixing plate 9, and the main air duct 10 is parallel to the nozzle fixing plate 9; the main air duct 10 is connected to an air inlet pipe 11, the air inlet pipe 11 extends out of the box body 6 and is connected to an air inlet port 12, and the air inlet port 12 is used to connect to a compressed air source, such as a blower and its air supply pipe, or an air compressor and its air supply pipe;

[0036] The nozzle fixing plate 9 is connected downwardly with a plurality of nozzles 13, which are evenly distributed on the nozzle fixing plate 9, and the air outlet direction of each nozzle 13 has an angle of 30°-90° (including both end values) with the sieve plate 7 and faces the sieve plate 7; the nozzle fixing plate 9 and the inner wall of the box are preferably softly connected to reduce the vibration of the nozzle fixing plate 9 and the nozzles 13 installed thereon. The side wall of the receiving hopper 4 is connected with an air outlet 14 in the middle of the vertical direction thereof.

[0037] The feed port 16 is connected to a rotary feeder 17, and the target material discharge port 15 is connected to a rotary discharger 18. The openings of the rotary discharger 18 and the viscous material outlet 3 are both arranged downward;

[0038] The receiving hopper 4 is flexibly connected to the conveying device 2 (such as through wear-resistant cloth), the feed port 16 is flexibly connected to the rotary feeder 17, and the target material discharge port 15 is flexibly connected to the rotary discharger 18. The nozzle fixing plate 9 is flexibly connected to the inner wall of the box body 6.

[0039] A plurality of wind shields 19 are evenly spaced in the box body 6 between the nozzle fixing plate 9 and the sieve plate 7. Each wind shield 19 is perpendicular to the nozzle fixing plate 9. There is a gap between the lower end of each wind shield 19 and the sieve plate 7 for the material to pass through. The direction from the feed port 16 to the target material discharge port 15 is the discharge direction.

[0040] The nozzle fixing plate 9, the screen plate 7 and the wind shield plates 19 divide the inner space of the box body 6 into a plurality of turbulent collision chambers 20 for collision separation along the discharge direction.

[0041] like Figure 3 As shown, the air nozzle fixing plate 9 may be rectangular, and the air nozzles 13 are distributed in a rectangular array.

[0042] like Figure 4 As shown, the nozzle fixing plate 9 may also be circular, and the nozzles 13 are distributed in rectangular circular rows.

[0043] The angle between the sieve plate 7 and the horizontal plane is 0°-30°, including both end values. The sieve plate 7 is preferably arranged tilted, that is, the feed end of the sieve plate 7 is preferably higher than its discharge end (the end with the target material discharge port is the discharge end).

[0044] The rotary feeder 17 and the rotary discharger 18 have the same structural principle (see Figure 1 ), a rotating shaft is arranged in the shell, and a plurality of rotating material-discharging plates are evenly connected to the rotating shaft along the circumference, and a feeding port 16 or a discharging port is arranged on the shell. Through the active rotation of the rotating shaft, each rotating material-discharging plate is driven to periodically dial in (feed in) or dial out (discharge) the material during rotation, and the feeding and discharging speed is controlled by controlling the rotation speed of the rotating shaft. The rotating feeder 17 and the rotating discharging device 18 are both existing technologies, and the specific structure will not be described in detail.

[0045] When in use, the rotary feeder 17 is connected to the conveying channel for conveying the raw materials to be separated, a container for receiving the target material is set below the rotary discharger 18, a container for receiving the viscous material is set below the viscous material outlet 3 of the conveying device 2, and the air outlet 14 is connected to an external dust removal device. The vibrator 8 and the conveying device are turned on, and compressed air is introduced through the air inlet 12 and the air inlet pipe 11 to start the vibrating screen, and the air nozzle 13 sprays compressed air to the screen plate 7.

[0046] The raw material particles to be separated enter the box body 6 through the rotary feeder 17 and the feed port 16, and pass through each windshield 19 one by one in the discharge direction, and then pass through each turbulent collision chamber 20 one by one. Under the injection of compressed air, the material particles form turbulence in each turbulent collision chamber 20 and continuously collide with each other. During the collision process, the fine particles (mainly sticky material particles) attached to the target material particles (hardness greater than sticky material) collide and fall down, thereby obtaining a better separation effect and obtaining cleaner large particles.

[0047] The target material particles as the oversize material fall down from the target material outlet into the container for receiving the target material, and the sticky material particles pass through the screen and enter the receiving hopper 4, then enter the conveying device, and finally fall down from the sticky material outlet 3 into the container for receiving the sticky material. The compressed air increases the air pressure in the receiving hopper 4, and the compressed air flows out from the air outlet 14 and enters the environment after being purified by the dust removal equipment.

[0048] The nozzle fixing plate 9, the screen plate 7 and the wind shield plates 19 divide the internal space of the box body 6 into a plurality of turbulent collision chambers 20 for collision separation along the discharge direction, which can greatly prolong the average number and average time of collisions between material particles when passing through the screen plate 7, thereby improving the material separation effect.

[0049] The material separation space is enclosed in the box body 6 and will not cause dust pollution to the outside.

[0050] The invention can not only screen out fine particles of sticky materials, but also purify the surface of large particles with compressed air. In the process of washing ore, the invention can completely replace the wet washing process. There is no need to transport the raw ore containing clay to the washing plant. The clay can be directly separated in the mining area, and the soil can be directly returned to the field. It not only saves costs, but also protects the natural environment.

[0051] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. Compressed air ore washing vibrating screen, including a fixed frame, a conveying device for conveying viscous materials is arranged in the fixed frame, and a viscous material outlet is arranged at the end of the conveying device; a receiving hopper is supported and fixed upward on the fixed frame, and the conveying device is connected with the receiving hopper upward and receives the viscous materials dropped from the receiving hopper; The fixed frame is connected with a box body upwards through a spring, and the box body is connected with the receiving hopper downwards; A sieve plate is provided at the bottom of the box, one end of the box above the sieve plate is connected to a feed port and the other end is connected to a target material discharge port; a vibrator is fixedly connected to the outer wall of the box; Features: A nozzle fixing plate is provided in the box body above the sieve plate, the nozzle fixing plate is parallel to the sieve plate and connected to the inner wall of the box body; a main air duct is provided in the box body above the nozzle fixing plate, the main air duct is parallel to the nozzle fixing plate; the main air duct is connected to an air inlet pipe, the air inlet pipe extends out of the box body and is connected to an air inlet, and the air inlet is used to connect to a compressed air source; The nozzle fixing plate is connected downwardly with a plurality of nozzles, and the air outlet direction of each nozzle has an angle of 30°-90° with the sieve plate and faces the sieve plate; The side wall of the receiving hopper is connected with an air outlet in the middle of the upper and lower directions; The multiple air nozzles are used to generate turbulent collisions of the raw material particles to be separated through the injection of compressed air; A plurality of wind shields are evenly spaced in the box between the nozzle fixing plate and the screen plate. Each wind shield is perpendicular to the nozzle fixing plate. There is a gap between the lower end of each wind shield and the screen plate. The direction from the feed port to the target material discharge port is the discharge direction. The nozzle fixing plate, the screen plate and the wind shield plates divide the inner space of the box into a number of turbulent collision chambers for collision separation along the discharge direction; The air nozzle fixing plate is rectangular, and the air nozzles are distributed in a rectangular array, or the air nozzle fixing plate is circular, and the air nozzles are distributed in a rectangular circular row; The angle between the sieve plate and the horizontal plane is 0°-30°.

2. The compressed air ore washing vibrating screen according to claim 1 is characterized in that: The openings of the rotary discharging device and the viscous material outlet are both arranged downward; the feeding port is connected with the rotary feeder, and the target material discharging port is connected with the rotary discharging device.

3. The compressed air ore washing vibrating screen according to claim 2 is characterized in that: The receiving hopper and the conveying device are flexibly connected, the feeding port and the rotary feeder are flexibly connected, the target material discharging port and the rotary discharging device are flexibly connected, and the nozzle fixing plate and the inner wall of the box are flexibly connected.

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