Screening system for limestone processing of surface mine

Abstract

The utility model discloses a screening system for processing limestone in a surface mine, which comprises a double-amplitude vibrating screen and further comprises a feeding assembly arranged at the feeding end of the double-amplitude vibrating screen and comprising a vibrating feeder; the re-crushing assembly comprises a cone crusher arranged at the discharging end of the double-amplitude vibrating screen, and a feeding part is arranged at the output end of the cone crusher; the grading assembly comprises a cyclone separator arranged at the output end of the feeding part, a conveying part is arranged at the fine material output end of the cyclone separator, a coarse material returning machine is arranged at the bottom of the coarse material output end of the cyclone separator, and a rebounding part is arranged at the top of the coarse material returning machine; according to the coarse material returning machine, the rebounding part is arranged at the top of the coarse material returning machine, the rebounding part generates elastic deformation in the discharging process, impact force is absorbed and dispersed through deformation of the rebounding part, blanking impact of coarse materials is buffered, and impact abrasion generated on the surface of a conveying belt of the coarse material returning machine in the discharging process is avoided.

Description

Technical Field

[0001] The utility model relates to the field of mine processing equipment, in particular to a screening system for limestone processing in open-pit mines. Background Art

[0002] Limestone, as a common ore, is widely used in many fields such as construction, chemical industry, and metallurgy. Existing limestone processing equipment generally uses a cyclone separator to grade and screen the limestone debris when processing limestone powder. The coarse material outlet at the bottom of the cyclone separator transports the coarse material back to the vibrating discharger through a belt conveyor for crushing. There is a height difference between the outlet end of the cyclone separator and the belt conveyor. Due to the lack of buffering treatment, the coarse material falls directly on the conveyor belt surface of the belt conveyor and impacts the conveyor belt surface. The surface of the conveyor belt is easily worn due to long-term impact. In order to solve this problem, a new screening system for limestone processing in open-pit mines is needed. Utility Model Content

[0003] The purpose of the utility model is to provide a screening system for limestone processing in open-pit mines to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a screening system for limestone processing in an open-pit mine, comprising a double-amplitude vibrating screen, and further comprising:

[0005] A feeding assembly, the feeding assembly being arranged at the feeding end of the dual-amplitude vibrating screen, the feeding assembly comprising a vibrating feeder;

[0006] A re-crushing assembly, the re-crushing assembly comprising a cone crusher disposed at the discharge end of the dual-amplitude vibrating screen, wherein the output end of the cone crusher is provided with a feed portion;

[0007] A grading component is used to grade the particle size of crushed ore. The grading component includes a cyclone separator arranged at the output end of the feeding part. The fine material output end of the cyclone separator is provided with a conveying part. The bottom of the coarse material output end of the cyclone separator is provided with a coarse material return conveyor. The top of the coarse material return conveyor is provided with a rebound part for buffering the impact of material discharge.

[0008] Preferably, the rebound part includes a material receiving box arranged on the top of the coarse material return conveyor, the inner cavity of the material receiving box is provided with a pressure-bearing inclined plate, the side of the pressure-bearing inclined plate is inserted and connected to the inner wall of the material receiving box, and a compression spring is provided at the insertion point of the pressure-bearing inclined plate and the material receiving box.

[0009] Preferably, an insert rod is provided on the side of the pressure-bearing inclined plate, the insert rod is sleeved on the middle part of the compression spring, and a pressure ring is provided on the outside of the insert rod and at one end of the compression spring close to the pressure-bearing inclined plate.

[0010] Preferably, an adjusting bolt is inserted through the outer thread of the material receiving box, and a pressure plate for adjusting the rebound force of the compression spring is provided at the end of the adjusting bolt.

[0011] Preferably, the output end of the coarse material return conveyor is arranged at the top of the feed port of the vibrating feeder.

[0012] Preferably, the conveying part includes a first belt conveyor provided at the fine material output end of the cyclone separator, and the first belt conveyor is used for completing the discharge and transportation of the limestone particles in a graded manner.

[0013] Preferably, the feeding part comprises a second belt conveyor arranged at the bottom of the output end of the cone crusher, and the output end of the second belt conveyor is arranged at the top of the feeding end of the cyclone separator.

[0014] Preferably, a third belt conveyor is provided at the output end of the vibrating feeder, and the discharge end of the third belt conveyor is arranged at the top of the feed port of the double-amplitude vibrating screen.

[0015] Technical effects and advantages of this utility model:

[0016] The utility model provides a rebound part for cushioning the discharge of coarse materials at the bottom of the coarse material outlet of the cyclone separator and the top of the coarse material return conveyor. The rebound part produces elastic deformation during discharge, thereby avoiding impact wear on the surface of the conveyor belt of the coarse material return conveyor during the discharge process. This design can cushion the impact of the coarse material falling, and utilizes the deformation of the rebound part to absorb and disperse the impact force, thereby reducing the impact on the conveyor belt of the coarse material return conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall principle of the utility model.

[0018] Figure 2 This is a schematic structural diagram of the hierarchical components of the present utility model.

[0019] Figure 3 It is a front view of the rebound part of the utility model.

[0020] Figure 4 It is a cross-sectional view of the rebound portion of the utility model.

[0021] In the figure: 1. Double-amplitude vibrating screen; 2. Vibrating feeder; 201. Third belt conveyor; 3. Cone crusher; 4. Second belt conveyor; 5. Cyclone separator; 501. Coarse material return conveyor; 502. First belt conveyor; 6. Rebound part; 601. Material receiving box; 602. Pressure inclined plate; 603. Compression spring; 604. Insert rod; 605. Pressure ring; 606. Adjusting bolt; 607. Pressure plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the 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.

[0023] The utility model provides Figure 1-4 The screening system for limestone processing in an open-pit mine shown includes a double-amplitude vibrating screen 1, a feeding assembly, a re-crushing assembly, and a classification assembly;

[0024] Specifically, the feeding assembly is arranged at the feeding end of the double-amplitude vibrating screen 1, and the feeding assembly includes a vibrating feeder 2, and a third belt conveyor 201 is provided at the output end of the vibrating feeder 2, and the discharge end of the third belt conveyor 201 is arranged at the top of the feeding port of the double-amplitude vibrating screen 1;

[0025] It should be noted that the mesh size of the dual-amplitude vibrating screen 1 is adjustable to achieve preliminary screening of limestone powder. The vibrating feeder 2 can be used to crush the ore. The third belt conveyor 201 conveys the ore crushed by the vibrating feeder 2 to the top of the dual-amplitude vibrating screen 1 for unloading.

[0026] Specifically, the re-crushing component includes a cone crusher 3 arranged at the discharge end of the double-amplitude vibrating screen 1. The output end of the cone crusher 3 is provided with a feeding part, and the fine material screened by the double-amplitude vibrating screen 1 is directly transported to the next operation;

[0027] It should be noted that the feeding section includes a second belt conveyor 4 arranged at the bottom of the output end of the cone crusher 3, and the grading assembly includes a cyclone separator 5 arranged at the output end of the feeding section, and the output end of the second belt conveyor 4 is arranged at the top of the feed end of the cyclone separator 5;

[0028] Specifically, the second belt conveyor 4 conveys the limestone crushed by the cone crusher 3 to the feed port of the cyclone separator 5;

[0029] Specifically, the grading component is used to grade the particle size of the crushed ore. The fine material output end of the cyclone separator 5 is provided with a conveying part, and the coarse material output end bottom of the cyclone separator 5 is provided with a coarse material return conveyor 501;

[0030] It should be noted that the fine material output end of the cyclone separator 5 can be provided with an electrostatic precipitator to remove impurities in the dust. The output end of the coarse material return conveyor 501 is provided at the top of the feed port of the vibrating feeder 2. The vibrating feeder 2 crushes the coarse material output from the cyclone separator 5 again, thereby recirculating the operation.

[0031] Specifically, the conveying part includes a first belt conveyor 502 provided at the fine material output end of the cyclone separator 5 , and the first belt conveyor 502 discharges and transports the classified limestone particles.

[0032] When in use, the machines in the screening system are started, run and stopped through the PLC controller, allowing staff to monitor the operating status and fault information of the equipment in real time;

[0033] The top of the coarse material return conveyor 501 is provided with a rebound portion 6 for buffering the impact of material discharge;

[0034] Specifically, the rebound portion 6 includes a material receiving box 601 provided on the top of the coarse material return conveyor 501. The inner cavity of the material receiving box 601 is provided with a pressure-bearing inclined plate 602. The side of the pressure-bearing inclined plate 602 is connected to the inner wall of the material receiving box 601 through insertion. A compression spring 603 is provided at the insertion point between the pressure-bearing inclined plate 602 and the material receiving box 601.

[0035] It should be noted that the bottom of the receiving box 601 is fixed to the side of the coarse material return conveyor 501 by welding. The coarse material return conveyor 501 is a belt conveyor. The pressure inclined plate 602 corresponds to the coarse material discharge port of the cyclone separator 5. The pressure inclined plate 602 is in close contact with the inner wall of the receiving box 601, so that the outer friction of the pressure inclined plate 602 acts as a damper, converting the impact energy into frictional heat.

[0036] Specifically, an insertion rod 604 is provided on the side of the pressure inclined plate 602, and the insertion rod 604 is sleeved in the middle of the compression spring 603. A pressure ring 605 is provided on the outside of the insertion rod 604 and at one end of the compression spring 603 close to the pressure inclined plate 602;

[0037] It should be noted that the insertion rod 604 is welded and fixed to the pressure inclined plate 602, and the insertion rod 604 is welded and fixed to the middle part of the pressure ring 605, and the pressure ring 605 is used to perform extrusion deformation of the compression spring 603;

[0038] Specifically, an adjusting bolt 606 is inserted through the outer thread of the receiving box 601, and a pressure plate 607 for adjusting the rebound force of the compression spring 603 is provided at the end of the adjusting bolt 606;

[0039] It should be noted that a threaded hole is provided at the bottom of the receiving box 601, and a movable groove for inserting a pressure plate 607 is provided at the top of the threaded hole. The pressure plate 607 is welded and fixed to the end of the compression spring 603. By rotating the adjusting bolt 606, the compressed length of the compression spring 603 is adjusted, thereby controlling the rebound force of the pressure-bearing inclined plate 602.

[0040] During actual use, a rebound portion 6 for cushioning the discharge of coarse materials is provided at the bottom of the coarse material outlet of the cyclone separator 5 and the top of the coarse material return conveyor 501. The rebound portion 6 produces elastic deformation during discharge, thereby avoiding impact wear on the surface of the conveyor belt of the coarse material return conveyor 501 during the discharge process. This design can cushion the impact of the coarse material falling, and utilize the deformation of the rebound portion 6 to absorb and disperse the impact force, thereby reducing the impact of the coarse material falling on the conveyor belt of the coarse material return conveyor 501.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Screening system for limestone processing in open pit mines, comprising a double-amplitude vibrating screen (1), characterized in that: Also includes: A feeding assembly, the feeding assembly being arranged at a feeding end of a double-amplitude vibrating screen (1), the feeding assembly comprising a vibrating feeder (2); A re-crushing assembly, the re-crushing assembly comprising a cone crusher (3) arranged at the discharge end of the double-amplitude vibrating screen (1), the output end of the cone crusher (3) being provided with a feeding portion; A grading assembly is provided for grading the particle size of crushed ore, the grading assembly comprising a cyclone separator (5) arranged at the output end of a feeding section, a conveying section being provided at the fine material output end of the cyclone separator (5), a coarse material return conveyor (501) being provided at the bottom of the coarse material output end of the cyclone separator (5), and a rebound section (6) for buffering the impact of material discharge being provided at the top of the coarse material return conveyor (501).

2. The screening system for limestone processing in open pit mines according to claim 1, characterized in that: The rebound portion (6) includes a material receiving box (601) arranged on the top of the coarse material return conveyor (501), the inner cavity of the material receiving box (601) is provided with a pressure-bearing inclined plate (602), the side of the pressure-bearing inclined plate (602) is connected to the inner wall of the material receiving box (601), and a compression spring (603) is provided at the intersection of the pressure-bearing inclined plate (602) and the material receiving box (601).

3. The screening system for limestone processing in open pit mines according to claim 2, characterized in that: An insertion rod (604) is provided on the side of the pressure-bearing inclined plate (602), and the insertion rod (604) is sleeved on the middle part of the compression spring (603). A pressure ring (605) is provided on the outside of the insertion rod (604) and at one end of the compression spring (603) close to the pressure-bearing inclined plate (602).

4. The screening system for limestone processing in open pit mines according to claim 2, characterized in that: An adjusting bolt (606) is inserted and connected to the outer thread of the material receiving box (601), and a pressure plate (607) for adjusting the rebound force of the compression spring (603) is provided at the end of the adjusting bolt (606).

5. The screening system for limestone processing in open pit mines according to claim 1, characterized in that: The output end of the coarse material return conveyor (501) is arranged at the top of the feed port of the vibrating feeder (2).

6. The screening system for limestone processing in open pit mines according to claim 1, characterized in that: The conveying section comprises a first belt conveyor (502) arranged at the fine material output end of the cyclone separator (5), and the first belt conveyor (502) is used for completing the discharge and transportation of limestone particles in a graded manner.

7. The screening system for limestone processing in open pit mines according to claim 1, characterized in that: The feeding part comprises a second belt conveyor (4) arranged at the bottom of the output end of the cone crusher (3), and the output end of the second belt conveyor (4) is arranged at the top of the feed end of the cyclone separator (5).

8. The screening system for limestone processing in open pit mines according to claim 1, characterized in that: The output end of the vibrating feeder (2) is provided with a third belt conveyor (201), and the discharge end of the third belt conveyor (201) is provided at the top of the feed port of the double-amplitude vibrating screen (1).

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