Ore particle grading and screening device

Abstract

The utility model discloses an ore particle grading and screening device, which relates to the field of screening equipment, and comprises a particle grading unit and a cyclone collecting unit, a grading wheel is arranged in the particle grading unit, a conveying pipe is arranged on the right side of the grading wheel, the conveying pipe is communicated with the cyclone collecting unit, and a feed opening is arranged at the bottom of the cyclone collecting unit. A dust removal fan bin is fixedly connected above the cyclone collection unit, the cyclone collection unit is communicated with the dust removal fan bin, a centrifugal turbine is arranged in the dust removal fan bin, the dust removal fan bin is communicated with a dust collection pipe, high-speed airflow carries particles to pass through the classification wheel, and the particles meeting the requirements pass through the classification wheel and are conveyed into the cyclone collection unit. Coarse particles with large particle sizes and part of fine particles are subjected to the effect of secondary air in the descending process, the fine particles rise again to enter the grading wheel, the coarse particles are discharged from the coarse particle recovery pipe and ground again, the utilization rate of raw materials is increased, the fine particles are graded again through secondary air supply, and the yield is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screening equipment, and specifically relates to an ore particle grading and screening device. BACKGROUND

[0002] Ore refers to mineral aggregates from which useful components can be extracted or which have certain properties that can be utilized, and can be divided into metallic minerals and non-metallic minerals. Before processing, ore needs to be crushed. The crushed ore particles vary in size. After grading the ore particles by size, different particle sizes of ore can be separated for processing, thereby optimizing subsequent beneficiation, smelting or other processing processes and improving processing efficiency. The grading and screening methods of ore particles include screening, sedimentation, airflow classification and gravity classification.

[0003] Ore is generally crushed using a ball mill. The coarse particles discharged after grading and screening may contain fine particles. After recycling and regrinding, the fine particles are too small to meet product requirements, which reduces the yield of particles. In order to improve the yield of particles, an ore particle grading and screening device is provided. SUMMARY

[0004] To solve the above technical problems, an ore particle grading and screening device is provided, which solves the problem of reduced particle yield caused by the inclusion of fine particles in the coarse particles discharged.

[0005] To achieve the above purposes, the technical scheme adopted by the utility model is as follows:

[0006] An ore particle grading and screening device includes a particle grading unit and a cyclone collection unit. The cyclone collection unit is arranged on one side of the particle grading unit. The particle grading unit and the lower part of the cyclone collection unit are both conical in shape. A feed pipe is connected to the lower end of the particle grading unit. A coarse particle recovery pipe is connected to the bottom of the particle grading unit. A blast ring cavity is arranged in the middle of the particle grading unit. A secondary blast pipe is connected to the side of the blast ring cavity. A grading wheel is installed in the particle grading unit. The grading wheel is arranged at the top of the particle grading unit and is horizontally arranged in the axial direction. A conveying pipe is arranged on the right side of the grading wheel. The conveying pipe penetrates the side wall of the particle grading unit and is connected to the inside of the cyclone collection unit.

[0007] Preferably, the outer wall of the particle grading unit is installed with a first motor through a mounting seat. The output end of the first motor is fixedly connected to the middle part of the grading wheel.

[0008] Preferably, the bottom of the cyclone collecting unit is provided with a discharge port, the cyclone collecting unit is fixedly connected with a dust removal fan bin above, the cyclone collecting unit communicates with the dust removal fan bin, the inside of the dust removal fan bin is provided with a centrifugal turbine, the top of the dust removal fan bin is provided with a second motor, the output end of the second motor is fixedly connected with the centrifugal turbine, the inside of the dust removal fan bin is provided with a spiral air duct, and one side of the dust removal fan bin is communicated with a dust collecting pipe.

[0009] Preferably, the dust collecting pipe communicates with an external filtering device.

[0010] Preferably, the secondary air supply pipe communicates with an external air supply fan.

[0011] The utility model has the beneficial effects compared with prior art:

[0012] 1、In the scheme, the inside of the particle grading unit is provided with a grading wheel, and the particles meeting the grading requirements are transported into the cyclone collecting unit through the blade gap of the grading wheel through centrifugal effect, and the coarse particles and part of the fine particles with large particle size are affected by the airflow of the secondary air supply in the descending process, the fine particles are carried upward into the grading wheel again by the airflow, the coarse particles are discharged from the coarse particle recovery pipe and sent to the ball mill for regrinding, the coarse particles are recycled and reprocessed, the raw material utilization rate is improved, and the yield is improved.

[0013] 2、The particle size of the grading passing particles can be adjusted by adjusting the rotating speed of the grading wheel and the air speed blown out of the secondary air supply pipe, and the diversified demand is met. DRAWINGS

[0014] Fig. 1 It is a structural schematic view of the utility model;

[0015] Fig. 2 It is a structural schematic view of the utility model.

[0016] The figure mark is:

[0017] 1、Particle grading unit;11、Feed pipe;12、Coarse particle recovery pipe;13、Air supply ring cavity;14、Secondary air supply pipe;15、Grading wheel;16、First motor;17、Conveying pipe;

[0018] 2、Cyclone collecting unit;21、Discharge port;22、Dust removal fan bin;23、Centrifugal turbine;24、Second motor;25、Dust collecting pipe. DETAILED DESCRIPTION

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. It is understood that the accompanying drawings are provided for reference and illustration only and are not intended to limit the present utility model. The connection relationships shown in the drawings are only for clear description and do not limit the connection method.

[0020] like Figs. 1-2 As shown, an ore particle grading and screening device includes a particle grading unit 1 and a cyclone collection unit 2. The cyclone collection unit 2 is located on one side of the particle grading unit 1. The lower parts of both the particle grading unit 1 and the cyclone collection unit 2 are conical. A feed pipe 11 is connected to the lower periphery of the particle grading unit 1. Ore particles crushed by a ball mill enter the particle grading unit 1 through the feed pipe 11. A coarse particle recovery pipe 12 is connected to the bottom of the particle grading unit 1. An air supply chamber 13 is located in the middle of the particle grading unit 1. A secondary air supply pipe 14 is connected to the periphery of the air supply chamber 13. The secondary air supply pipe 14 is connected to an external blower to provide high-speed airflow to the inside of the particle grading unit 1. A grading wheel 15 is installed inside the particle grading unit 1. The grading wheel 15 is located at the top of the particle grading unit 1 and is horizontally oriented in the axial direction. A conveying pipe 17 is located on the right side of the grading wheel 15. The conveying pipe 17 penetrates the side wall of the particle grading unit 1 and connects to the inside of the cyclone collection unit 2. A mounting base is installed on the outer wall of the particle grading unit 1. The first motor 16 has its output end fixedly connected to the middle of the classifying wheel 15. The first motor 16 drives the classifying wheel 15 to rotate at high speed. The ore particles entering the particle classification unit 1 rise under the influence of the rising airflow and contact the classifying wheel 15. The high-speed rotation of the classifying wheel 15 generates centrifugal force. Particles that meet the classification requirements pass through the gap between the blades of the classifying wheel 15 and are transported to the cyclone collection unit 2 through the conveying pipe 17. Coarse particles that do not meet the particle size requirements and some fine particles that do not pass through the classifying wheel 15 collide with each other and decelerate, and fall down along the inner wall of the particle classification unit 1. The fine particles are blown up by the secondary air blown out of the secondary air supply pipe 14 at the air supply chamber 13 and pass through the classifying wheel 15 again for classification. The falling coarse particles are discharged by the coarse particle recovery pipe 12 and conveyed to the ball mill for further grinding. After being crushed into smaller particles, they re-enter the particle classification unit 1 for classification and screening. The particle size of the passing particles can be adjusted by adjusting the rotation speed of the classifying wheel 15 and the air speed blown out of the secondary air supply pipe 14 to meet diverse needs.

[0021] The bottom of the cyclone collecting unit 2 is provided with a discharge port 21 for discharging the final product, the upper portion of the cyclone collecting unit 2 is fixedly connected with a dust removal fan bin 22, the cyclone collecting unit 2 is communicated with the dust removal fan bin 22, the inside of the dust removal fan bin 22 is provided with a centrifugal turbine 23, the upper portion of the dust removal fan bin 22 is provided with a second motor 24, the output end of the second motor 24 is fixedly connected with the centrifugal turbine 23, the inside of the dust removal fan bin 22 is provided with a spiral air duct, one side of the dust removal fan bin 22 is communicated with a dust collecting pipe 25, the high-speed airflow carries the qualified ore particles into the cyclone collecting unit 2 along the tangential direction, the airflow changes from linear motion to circular motion along the inner wall of the cyclone collecting unit 2 and flows downwards in a spiral shape, the ore particles are continuously collided with the inner wall of the cyclone collecting unit 2 under the action of the centrifugal force, the speed is reduced, and finally falls along the inner wall and is discharged from the discharge port 21, the airflow continuously flows into the central part of the separator during the descending process, forms the centripetal radial airflow, the airflow constitutes the upward rotating inner vortex and moves upwards with the finer dust, the airflow carries a part of the unseparated particles into the dust removal fan bin 22 during the upward process, the high-speed rotation of the centrifugal turbine 23 in the dust removal fan bin 22 causes the pressure difference between the dust removal fan bin 22 and the cyclone collecting unit 2, the airflow carries the particles into the centrifugal turbine 23 along the axial direction and is discharged from the radial direction of the centrifugal turbine 23, and finally is discharged through the dust collecting pipe 25, the dust collecting pipe 25 is communicated with the external filtering equipment, part of the particles can be captured by filtering, and the dust generated during the crushing process can be collected to avoid environmental pollution.

[0022] The principle of the utility model is that: the ore particles carried in the high-speed airflow are classified by the classification wheel 15 in the particle classification unit 1, the particles meeting the particle size requirement are sent into the cyclone collecting unit 2 through the conveying pipe 17, the coarse particles carry part of the fine particles during the descending process through the air supply ring surrounding cavity 13, under the action of the secondary air, the fine particles are carried upwards into the classification wheel 15 again for classification, the coarse particles are discharged from the coarse particle recovery pipe 12 and are sent into the ball mill again for grinding, the ore particles in the cyclone collecting unit 2 contact the inner wall, the speed is reduced after rotating and descending, and finally are discharged from the discharge port 21, the finer dust moves upwards under the action of the centripetal radial airflow and carries part of the particles into the dust removal fan bin 22, under the action of the centrifugal turbine 23, the particles and the dust are conveyed to the external filtering equipment through the dust collecting pipe 25, so that the environment is not polluted by the dust discharge.

[0023] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A particle grading and screening device for ore, characterized in that: Including particle grading unit (1) and cyclone collection unit (2), the cyclone collection unit (2) is arranged on one side of the particle grading unit (1), the particle grading unit (1) and the lower part of the cyclone collection unit (2) are conical, the lower end of the particle grading unit (1) is communicated with the feed pipe (11), the bottom of the particle grading unit (1) is communicated with the coarse particle recovery pipe (12), the middle part of the particle grading unit (1) is provided with a blast ring around the cavity (13), the periphery of the blast ring around the cavity (13) is communicated with the secondary air supply pipe (14), the inside of the particle grading unit (1) is provided with a grading wheel (15), the grading wheel (15) is arranged on the top of the particle grading unit (1) and its axial direction is horizontally arranged, the right side of the grading wheel (15) is provided with a conveying pipe (17), the conveying pipe (17) penetrates the side wall of the particle grading unit (1) and is communicated with the inside of the cyclone collection unit (2).

2. An apparatus for sizing and sorting ore particles as claimed in claim 1 wherein: The outer wall of the particle grading unit (1) is provided with a first motor (16) through a mounting seat, and the output end of the first motor (16) is fixedly connected with the middle part of the grading wheel (15).

3. A device for sizing and sorting ore particles according to claim 1, characterized in that: The bottom of the cyclone collection unit (2) is provided with a discharge port (21), the upper part of the cyclone collection unit (2) is fixedly connected with a dust removal fan bin (22), the cyclone collection unit (2) is communicated with the dust removal fan bin (22), the inside of the dust removal fan bin (22) is provided with a centrifugal turbine (23), the upper part of the dust removal fan bin (22) is provided with a second motor (24), the output end of the second motor (24) is fixedly connected with the centrifugal turbine (23), the inside of the dust removal fan bin (22) is provided with a spiral air duct, and one side of the dust removal fan bin (22) is communicated with a dust collection pipe (25).

4. An apparatus for sizing and sorting ore particles as claimed in claim 3 wherein: The dust collection pipe (25) is communicated with an external filtering device.

5. A device for sizing and sorting ore particles according to claim 1, characterized in that: The secondary air supply pipe (14) is communicated with an external air supply machine.

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