Low-grade ore recovery crushing device and crushing process thereof

Abstract

The application relates to the technical field of low-grade ore recovery crushing, and discloses a low-grade ore recovery crushing device, which comprises a device shell, a mounting rack is fixedly installed at the top of the device shell, a crushing device main body is fixedly installed on the mounting rack, a discharge port is formed in the front of the device shell, and a screening mechanism is installed in the device shell; the screening mechanism comprises a mounting seat which is fixedly installed on the inner wall of the device shell; the crushed ore is screened by a screening plate; the center shaft is driven to rotate by a driving component, so that the screening plate is driven to rotate; when the screening plate rotates slightly, the ore can be shaken and scattered, so that the ore can be better screened; meanwhile, large ore bodies can be better shaken to the edges of the screening plate, and the ore falls from the screening plate to the discharge port.

Description

Technical Field

[0001] This invention relates to the field of low-grade ore recovery and crushing technology, specifically to a low-grade ore recovery and crushing device and its crushing process. Background Technology

[0002] Ore refers to a mineral aggregate from which useful components can be extracted or which possesses certain usable properties. It can be divided into metallic minerals and non-metallic minerals. Ore structure refers to the distribution characteristics reflected by the morphology, size, and spatial relationships of the mineral aggregates that make up the ore. Ore texture refers to the distribution characteristics reflected by the morphology, size, and spatial relationships of individual mineral crystal grains in the ore, and is generally divided into lean ore, common ore, and rich ore. Sometimes it is only divided into lean ore and rich ore; there is no unified standard for this classification, and each industrial sector and mining area generally has its own calculation range. Based on the properties of the useful minerals contained and the characteristics of utilization, ores are divided into two main categories: metallic ores and non-metallic ores. Low-grade zinc oxide ore is a type of mineral, and it needs to be crushed during processing.

[0003] To ensure the crushed ore meets specifications, existing crushing equipment often incorporates screening structures inside the crushing unit or at its discharge port. These screening structures fall into two main categories to remove larger particles. The first type uses inclined screen plates, where the ore rolls along the plate to achieve screening. Larger particles roll to the collection point, while smaller particles fall through the screen holes. While this method allows for continuous and rapid screening, it results in a large number of small particles rolling to the collection point along with the larger ones, leading to low screening efficiency. The second type uses horizontally placed screen plates. Larger particles remain on the plate, while smaller particles fall through the screen holes, effectively preventing small particles from rolling to the collection point. However, this method requires frequent cleaning of the large particles from the screen plate, increasing workload and offering only a slight improvement in screening efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a low-grade ore recovery and crushing device and its crushing process to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-grade ore recovery and crushing device, comprising an equipment shell, an installation frame fixedly installed on the top of the equipment shell, a crushing equipment body fixedly installed on the installation frame, a discharge port opened on the front of the equipment shell, and a screening mechanism installed inside the equipment shell;

[0006] The screening mechanism includes a mounting base, which is fixedly installed on the inner wall of the equipment housing. A screening chamber is fixedly installed on the outer wall of the mounting base. The top of the screening chamber has a feed inlet, the bottom of the screening chamber has a discharge outlet, and the right side of the screening chamber has a distribution outlet located on the lower half of the screening chamber. The inner wall of the screening chamber is rotatably connected to a central shaft via bearings. A screening plate is fixedly installed on the outer wall of the central shaft, dividing the interior of the screening chamber into non-communicating spaces. An arc-shaped plate is fixedly installed on the top left end of the screening plate, and an arc-shaped plate is fixedly installed on the bottom right end of the screening plate. The outer surfaces of the arc-shaped plates are attached to the inner wall of the screening chamber. The inner diameters of the feed inlet, discharge outlet, and distribution outlet are the same, and the outer diameters of the arc-shaped plates are larger than the inner diameters of the feed inlet, discharge outlet, and distribution outlet. A driving component is located at the rear of the screening chamber and is connected to the central shaft via a transmission connection.

[0007] Furthermore, the driving component includes an electric drive structure or a manual drive structure. The electric drive structure includes a geared motor, which is fixedly installed on the back of the equipment housing. A rotating shaft is fixedly installed at the output end of the geared motor, and the rotating shaft is connected to the central shaft through a pulley set.

[0008] Furthermore, the manual drive structure includes a connecting plate, a support plate, an upper limit plate, and a lower limit plate. The connecting plate is fixedly installed on the rear end of the central shaft. A rotating arm is fixedly installed on the back of the connecting plate. A guide groove is provided on the top of the rotating arm. The guide groove is close to the left end of the rotating arm. A slide is slidably arranged inside the guide groove. A pull rope is fixedly installed at the bottom of the slide. A counterweight is fixedly installed at the bottom end of the pull rope. The support plate, upper limit plate, and lower limit plate are fixedly installed on the back of the screening chamber. The counterweight rests on the support plate. The right end of the rotating arm is located between the upper limit plate and the lower limit plate.

[0009] Furthermore, a material distribution pipe and a discharge pipe are fixedly installed on the outer wall of the screening chamber. The material distribution pipe is connected to the material distribution port, and the discharge pipe is connected to the discharge port.

[0010] Furthermore, a guide block is fixedly installed on the inner wall of the main body of the crushing equipment. There are two guide blocks, which are parallel to the crushing roller inside the main body of the crushing equipment. Crushing teeth are fixedly installed on the outer wall of the guide block facing the crushing roller.

[0011] Furthermore, a spray frame is fixedly installed on the upper surface of the guide block, and a spray head is fixedly installed on the outer wall of the spray frame facing the crushing roller.

[0012] Furthermore, the outer walls of the first and second arc-shaped plates are provided with water-permeable holes, the left half of the screening plate is a flat plate, and the right half of the screening plate is a slanted plate.

[0013] Furthermore, a guide plate is fixedly installed on the bottom inner wall of the equipment housing, with the front end of the guide plate facing the discharge port.

[0014] Furthermore, a feeding bin is fixedly installed on the outer wall of the mounting frame, a slide rail is fixedly installed on the inner side of the feeding bin, a second geared motor is fixedly installed on the outer wall of the feeding bin, a reciprocating lead screw is fixedly installed at the output end of the second geared motor, a slider is threaded on the outer wall of the reciprocating lead screw, the slider is slidably disposed in the slide rail, and a feeding rod is rotatably connected to the bottom of the slider through a bearing.

[0015] A crushing process for a low-grade ore recovery and crushing device includes the following steps:

[0016] S1. Use conveying equipment to transport the ore into the feed hopper;

[0017] S2. Move the material-pulling rod left and right to push the ore to the left and right;

[0018] S3. The ore falls from the feed hopper into the main body of the crushing equipment and is crushed by the crushing rollers inside the main body of the crushing equipment.

[0019] S4. Turn on the spray head to spray water onto the crushing roller;

[0020] S5. The crushed ore enters the screening bin from the feed inlet;

[0021] S6. The ore falls onto the screening plate and is screened. Small ore passes through the screening plate and is discharged from the outlet, while large ore remains on the screening plate.

[0022] S7. The screen plate is rotated by the central shaft, so that the screen plate rotates back and forth at a small angle. When the discharge port is not blocked by the arc plate, large ore is thrown into the discharge port.

[0023] S8. When a large amount of ore remains in the screening plate, the central shaft drives the screening plate to rotate at a large angle, causing the entire feed opening to be exposed. At this time, the feed inlet is blocked by the arc plate, and the large ore on the screening plate is discharged from the feed opening.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. The crushed ore is screened using a screening plate. The drive component rotates the central shaft, which in turn rotates the screening plate. When the screening plate rotates slightly, it can shake the ore apart, allowing it to be screened better. At the same time, larger ore particles are shaken to the edge of the screening plate and then leak out through the feed inlet. The ore rolls from the screening plate into the feed inlet. When the screening plate rotates at a larger angle, the feed inlet is completely exposed. At this time, the screening plate is tilted at a large angle, and the arc plate blocks the feed inlet. All the large ore particles on the screening plate fall into the feed inlet. This design not only improves the screening efficiency of the ore but also reduces the waste of small ore particles.

[0026] 2. The reciprocating screw is driven by the second geared motor to rotate, which causes the slider to move left and right, and in turn drives the feeding rod to move left and right. This is used to push the ore in the feed bin apart, so that the ore is dispersed into the main body of the crushing equipment, making it easier for the main body of the crushing equipment to crush the ore. Also, because the feeding rod can rotate, it can rotate under force when pushing the ore, which can prevent the feeding rod from getting stuck with the ore.

[0027] 3. As more large ore remains on the screening plate, the plate will tilt, exposing the discharge port. The ore will then be discharged from the discharge port. The tilting of the screening plate will cause the central shaft to rotate, which in turn causes the connecting plate to rotate, resulting in the rotation of the rotating arm. The rotation of the rotating arm will then cause the slide to move, causing the pull rope to pull the counterweight upward. The slide will slide along the guide groove towards the center of the rotating arm, reducing the lever arm acting on the left end of the rotating arm. This allows the screening plate to maintain its tilt for a certain period of time, giving the large ore on the screening plate enough time to roll into the discharge port. This method can automatically discharge the large ore from the screening plate without the need for electrical operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 Structural diagram of the rear view;

[0030] Figure 3 For the present invention Figure 1 A structural schematic diagram of the front sectional view;

[0031] Figure 4 For the present invention Figure 1 A structural schematic diagram of the right-side sectional view;

[0032] Figure 5 This is a schematic diagram of the structure of the screening chamber of the present invention (front sectional view).

[0033] Figure 6 This is a schematic diagram of the electric drive structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the material guide block and spray frame of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the feed hopper from top view;

[0036] Figure 9 This is a schematic diagram of the slide rail, slide table, and material feeding rod of the present invention;

[0037] Figure 10 This is a schematic diagram of the manual drive structure of the present invention.

[0038] In the diagram: 1. Equipment casing; 2. Mounting frame; 3. Crushing equipment body; 4. Discharge port; 5. Screening mechanism; 501. Mounting base; 502. Screening bin; 503. Central shaft; 504. Feed inlet; 505. Discharge outlet; 506. Distribution port; 507. Screening plate; 508. Arc plate one; 509. Arc plate two; 6. Distribution pipe; 7. Discharge pipe; 8. Drive components; 801. Gear motor one; 802. Rotating shaft; 8 03. Connecting plate; 804. Rotating arm; 805. Guide groove; 806. Slide table; 807. Pull rope; 808. Counterweight; 809. Support plate; 8010. Upper limit plate; 8011. Lower limit plate; 9. Guide block; 10. Crushing tooth; 11. Spray frame; 12. Spray head; 13. Feed hopper; 14. Slide rail; 15. Reciprocating screw; 16. Slider; 17. Feeding rod; 18. Gear motor II; 19. Guide plate. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example 1

[0040] Please see Figures 1-10 The present invention provides a technical solution: a low-grade ore recovery and crushing device, including an equipment shell 1, an installation frame 2 fixedly installed on the top of the equipment shell 1, a crushing equipment body 3 fixedly installed on the installation frame 2, a discharge port 4 opened on the front of the equipment shell 1, and a screening mechanism 5 installed inside the equipment shell 1.

[0041] The screening mechanism 5 includes a mounting base 501, which is fixedly installed on the inner wall of the equipment housing 1. A screening chamber 502 is fixedly installed on the outer wall of the mounting base 501. The top of the screening chamber 502 has a feed inlet 504, the bottom of the screening chamber 502 has a discharge outlet 505, and the right side of the screening chamber 502 has a distribution outlet 506 located on the lower half of the screening chamber 502. A central shaft 503 is rotatably connected to the inner wall of the screening chamber 502 via bearings. A screening plate 507 is fixedly installed on the outer wall of shaft 503. The screening plate 507 divides the interior of screening chamber 502 into non-communicating spaces. An arc-shaped plate 508 is fixedly installed on the top left end of the screening plate 507, and an arc-shaped plate 509 is fixedly installed on the bottom right end of the screening plate 507. The outer surfaces of arc-shaped plates 508 and 509 are attached to the inner wall of screening chamber 502. The inner diameters of the inlet 504, outlet 505, and distribution outlet 506 are the same. The outer diameter of the screening chamber 509 is larger than the inner diameter of the feed inlet 504, discharge outlet 505, and distribution outlet 506. A drive unit 8 is located behind the screening chamber 502, and the drive unit 8 is connected to the central shaft 503. The screening plate 507 is used to screen the crushed ore. The drive unit 8 drives the central shaft 503 to rotate, which in turn drives the screening plate 507 to rotate. When the screening plate 507 rotates slightly, it can disperse the ore, allowing for better screening of larger ore volumes. Larger particles are more easily shaken to the edge of the screening plate 507 and then leak out through the feed inlet 506. The ore rolls from the screening plate 507 into the feed inlet 506. When the screening plate 507 rotates at a large angle, the feed inlet 506 is completely exposed. At this time, the screening plate 507 is tilted at a large angle, and the arc plate 508 blocks the feed inlet 504. All the large ore on the screening plate 507 falls into the feed inlet 506. This design can not only improve the screening efficiency of ore, but also reduce the waste of small particles of ore.

[0042] The drive component 8 includes an electric drive structure or a manual drive structure. The electric drive structure includes a geared motor 801, which is fixedly installed on the back of the equipment housing 1. A rotating shaft 802 is fixedly installed at the output end of the geared motor 801. The rotating shaft 802 is connected to the central shaft 503 through a pulley set. The geared motor 801 drives the rotating shaft 802 to rotate, thereby driving the central shaft 503 to rotate.

[0043] The outer wall of the screening chamber 502 is fixedly installed with a material distribution pipe 6 and a discharge pipe 7. The material distribution pipe 6 is connected to the material distribution port 506, and the discharge pipe 7 is connected to the discharge port 505.

[0044] Two guide blocks 9 are fixedly installed on the inner wall of the main body 3 of the crushing equipment. They are parallel to the crushing roller inside the main body 3 of the crushing equipment. Crushing teeth 10 are fixedly installed on the outer wall of the guide block 9 facing the crushing roller. The guide blocks 9 are used to guide the ore to the crushing roller inside the main body 3 of the crushing equipment. The crushing teeth 10 can cooperate with the crushing roller to crush the ore.

[0045] A spray frame 11 is fixedly installed on the upper surface of the guide block 9. A spray head 12 is fixedly installed on the outer wall of the spray frame 11 facing the crushing roller. Water is sprayed onto the crushing roller through the spray head 12, so that the water and ore are mixed together, which can increase the fluidity of the ore and cool down the crushing roller, reducing the working fatigue of the crushing roller.

[0046] Water-permeable holes are provided on the outer walls of the first arc plate 508 and the second arc plate 509. The left half of the screening plate 507 is a flat plate and the right half of the screening plate 507 is a sloping plate. Water-permeable holes are provided on the first arc plate 508 and the second arc plate 509 so that when the first arc plate 508 blocks the feed inlet 504, water can still flow into the screening bin 502 and then impact the ore on the screening plate 507, accelerating the ore to roll into the feed outlet 506.

[0047] A guide plate 19 is fixedly installed on the bottom inner wall of the equipment shell 1. The front end of the guide plate 19 faces the discharge port 4. The screened ore is guided to the discharge port 4 through the guide plate 19, making it easier for workers to take out the ore.

[0048] A feed bin 13 is fixedly installed on the outer wall of the mounting frame 2. A slide rail 14 is fixedly installed on the inner side of the feed bin 13. A second geared motor 18 is fixedly installed on the outer wall of the feed bin 13. A reciprocating screw 15 is fixedly installed at the output end of the second geared motor 18. A slider 16 is threaded on the outer wall of the reciprocating screw 15. The slider 16 is slidably disposed in the slide rail 14. A feeding rod 17 is rotatably connected to the bottom of the slider 16 through a bearing. The second geared motor 18 drives the reciprocating screw 15 to rotate, causing the slider 16 to move left and right, which in turn drives the feeding rod 17 to move left and right. This is used to push the ore in the feed bin 13 apart, so that the ore is dispersed into the main body 3 of the crushing equipment, which facilitates the crushing of the ore by the main body 3 of the crushing equipment. Since the feeding rod 17 can rotate, it can rotate under force when pushing the ore, which can prevent the feeding rod 17 from getting stuck with the ore.

[0049] Working principle: During use, the conveying equipment transports the ore into the feed hopper 13. The geared motor 18 is turned on, driving the reciprocating screw 15 to rotate, causing the slider 16 to move left and right, which in turn drives the material-pulling rod 17 to move left and right, thus dispersing the ore in the feed hopper 13 and allowing it to disperse into the crushing equipment body 3. The crushing equipment body 3 crushes the ore. The spray head 12 is turned on to spray water onto the crushing rollers. The crushed ore enters the screening hopper 502 from the feed inlet 504, falls onto the screening plate 507 for screening, and smaller pieces pass through the screening plate 507 and exit from the discharge outlet 502. 05. Large ore is discharged, leaving it on the screening plate 507. The geared motor 801 is turned on, driving the rotating shaft 802 to rotate, which in turn drives the central shaft 503 to rotate. The central shaft 503 drives the screening plate 507 to rotate, causing the screening plate 507 to rotate back and forth at small angles. When the feed opening 506 is not blocked by the arc plate 509, the large ore is thrown into the feed opening 506. The central shaft 503 drives the screening plate 507 to rotate at a large angle, causing the feed opening 506 to be completely exposed. At this time, the feed inlet 504 is blocked by the arc plate 508, and the large ore on the screening plate 507 is discharged from the feed opening 506. Example 2

[0050] Please see Figure 10 The present invention provides a technical solution: a low-grade ore recovery and crushing device, including an equipment shell 1, an installation frame 2 fixedly installed on the top of the equipment shell 1, a crushing equipment body 3 fixedly installed on the installation frame 2, a discharge port 4 opened on the front of the equipment shell 1, and a screening mechanism 5 installed inside the equipment shell 1.

[0051] The screening mechanism 5 includes a mounting base 501, which is fixedly installed on the inner wall of the equipment housing 1. A screening chamber 502 is fixedly installed on the outer wall of the mounting base 501. The top of the screening chamber 502 has a feed inlet 504, the bottom of the screening chamber 502 has a discharge outlet 505, and the right side of the screening chamber 502 has a distribution outlet 506 located on the lower half of the screening chamber 502. The inner wall of the screening chamber 502 is rotatably connected to a central shaft 503 via bearings. A screening plate 507 is fixedly installed on the outer wall of the central shaft 503. The screening plate 507 filters the contents of the screening chamber 502. The screening chamber 502 is divided into non-interconnected spaces. An arc-shaped plate 508 is fixedly installed on the top left end of the screening plate 507, and an arc-shaped plate 509 is fixedly installed on the bottom right end of the screening plate 507. The outer surfaces of the arc-shaped plates 508 and 509 are attached to the inner wall of the screening chamber 502. The inner diameters of the feed inlet 504, the discharge outlet 505, and the distribution outlet 506 are the same. The outer diameters of the arc-shaped plates 508 and 509 are larger than the inner diameters of the feed inlet 504, the discharge outlet 505, and the distribution outlet 506. A drive component 8 is provided at the rear of the screening chamber 502, and the drive component 8 is connected to the central shaft 503 for transmission.

[0052] Drive component 8 includes an electric drive structure or a manual drive structure.

[0053] The manual drive structure includes a connecting plate 803, a support plate 809, an upper limit plate 8010, and a lower limit plate 8011. The connecting plate 803 is fixedly installed on the rear end of the central shaft 503. A rotating arm 804 is fixedly installed on the back of the connecting plate 803. A guide groove 805 is opened on the top of the rotating arm 804, and the guide groove 805 is close to the left end of the rotating arm 804. A slide table 806 is slidably arranged inside the guide groove 805. A pull rope 807 is fixedly installed on the bottom of the slide table 806, and a counterweight 808 is fixedly installed at the bottom end of the pull rope 807. The support plate 809, the upper limit plate 8010, and the lower limit plate 8011 are fixedly installed on the back of the screening chamber 502. The counterweight 808 rests on the support plate 809. The right end of the rotating arm 804 is located between the upper limit plate 8010 and the lower limit plate 8011. When a large amount of large ore remains on the screening plate 507, the screening plate 507 will tilt, exposing the feed outlet 506. The ore will be discharged from the feed outlet 506. The tilting of the screening plate 507 will cause the central shaft 503 to rotate. The rotation of the central shaft 503 will cause the connecting plate 803 to rotate, causing the rotating arm 804 to rotate. The rotation of the rotating arm 804 will cause the slide table 806 to move, causing the pull rope 807 to pull the counterweight 808 to rise. The slide table 806 will slide along the guide groove 805 towards the center of the rotating arm 804, making the lever arm acting on the left end of the rotating arm 804 smaller. This allows the screening plate 507 to maintain its tilt for a certain period of time, giving the large ore on the screening plate 507 enough time to roll into the feed outlet 506. This method can automatically discharge the large ore on the screening plate 507 without the need for electrical operation.

[0054] The outer wall of the screening chamber 502 is fixedly installed with a material distribution pipe 6 and a discharge pipe 7. The material distribution pipe 6 is connected to the material distribution port 506, and the discharge pipe 7 is connected to the discharge port 505.

[0055] Two guide blocks 9 are fixedly installed on the inner wall of the main body 3 of the crushing equipment. They are parallel to the crushing roller inside the main body 3 of the crushing equipment. Crushing teeth 10 are fixedly installed on the outer wall of the guide block 9 facing the crushing roller.

[0056] A spray frame 11 is fixedly installed on the upper surface of the guide block 9, and a spray head 12 is fixedly installed on the outer wall of the spray frame 11 facing the crushing roller.

[0057] Water-permeable holes are provided on the outer walls of the arc plate 1 508 and the arc plate 2 509. The left half of the screening plate 507 is a flat plate, and the right half of the screening plate 507 is a slanted plate.

[0058] A guide plate 19 is fixedly installed on the bottom inner wall of the equipment housing 1, with the front end of the guide plate 19 facing the discharge port 4;

[0059] A feeding bin 13 is fixedly installed on the outer wall of the mounting frame 2. A slide rail 14 is fixedly installed on the inner side of the feeding bin 13. A second geared motor 18 is fixedly installed on the outer wall of the feeding bin 13. A reciprocating screw 15 is fixedly installed at the output end of the second geared motor 18. A slider 16 is threaded on the outer wall of the reciprocating screw 15. The slider 16 is slidably disposed in the slide rail 14. A feeding rod 17 is rotatably connected to the bottom of the slider 16 through a bearing.

[0060] Working Principle: During operation, the ore is conveyed into the feed hopper 13 using a conveying device. The geared motor 18 is activated, driving the reciprocating screw 15 to rotate, causing the slider 16 to move left and right. This, in turn, moves the material-pushing rod 17 left and right, separating the ore in the feed hopper 13 and dispersing it into the crushing equipment body 3. The crushing equipment body 3 crushes the ore. The spray head 12 sprays water onto the crushing rollers. The crushed ore enters the screening hopper 502 through the feed inlet 504. The ore falls onto the screening plate 507 and is screened. Small ore passes through the screening plate 507 and is discharged from the discharge outlet 505, while large ore remains on the screening plate 507. As more large ore remains on the screening plate 507, the screening plate 507 will tilt. When the feed inlet 506 is exposed, the ore will be discharged from the feed inlet 506. The tilting of the screening plate 507 will cause the central shaft 503 to rotate. The rotation of the central shaft 503 will cause the connecting plate 803 to rotate, which will cause the rotating arm 804 to rotate. The rotation of the rotating arm 804 will cause the slide table 806 to move, which will cause the pull rope 807 to pull the counterweight 808 to rise. The slide table 806 will slide along the guide groove 805 towards the center of the rotating arm 804, which will reduce the lever arm acting on the left end of the rotating arm 804. This will allow the screening plate 507 to maintain its tilt for a certain period of time, giving large ore on the screening plate 507 enough time to roll into the feed inlet 506. This method can automatically discharge large ore on the screening plate 507 without the need for electrical operation. Example 3

[0061] Please see Figures 1-9 This invention provides a technical solution: a crushing process for a low-grade ore recovery and crushing device, comprising the following steps:

[0062] S1. Use conveying equipment to transport the ore into the feed hopper 13;

[0063] S2. By moving the material pusher 17 left and right, the ore is pushed to the left and right, so that the ore is dispersed into the main body 3 of the crushing equipment, making it easier for the main body 3 of the crushing equipment to crush the ore.

[0064] S3. The ore falls from the feed hopper 13 into the main body 3 of the crushing equipment and is crushed by the crushing rollers inside the main body 3 of the crushing equipment.

[0065] S4. Turn on the spray head 12 to spray water onto the crushing roller, so that the water mixes with the ore, which can increase the fluidity of the ore and cool down the crushing roller, reducing the working fatigue of the crushing roller.

[0066] S5. The crushed ore enters the screening bin 502 from the feed inlet 504;

[0067] S6. The ore falls onto the screening plate 507 and is screened. Small ore passes through the screening plate 507 and is discharged from the discharge port 505, while large ore remains on the screening plate 507.

[0068] S7. The screen plate 507 is rotated by the central shaft 503, so that the screen plate 507 rotates back and forth at a small angle. When the feed opening 506 is not blocked by the arc plate 509, the large ore is thrown into the feed opening 506.

[0069] S8. When a large amount of ore remains in the screening plate 507, the central shaft 503 drives the screening plate 507 to rotate at a large angle, causing the entire feed port 506 to be exposed. At this time, the feed port 504 is blocked by the arc plate 508, and the large ore on the screening plate 507 is discharged from the feed port 506.

[0070] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A low-grade ore recovery and crushing device, comprising an equipment shell (1), wherein a mounting frame (2) is fixedly installed on the top of the equipment shell (1), and a crushing equipment body (3) is fixedly installed on the mounting frame (2), and a discharge port (4) is provided on the front of the equipment shell (1), characterized in that: A screening mechanism (5) is installed inside the outer casing (1) of the equipment. The screening mechanism (5) includes a mounting base (501), which is fixedly installed on the inner wall of the equipment housing (1). A screening chamber (502) is fixedly installed on the outer wall of the mounting base (501). A feed inlet (504) is provided at the top of the screening chamber (502), and a discharge outlet (505) is provided at the bottom of the screening chamber (502). A distribution outlet (506) is provided on the right side of the screening chamber (502), and the distribution outlet (506) is located on the lower half of the screening chamber (502). A central shaft (503) is rotatably connected to the inner wall of the screening chamber (502) through a bearing. A screening plate (507) is fixedly installed on the outer wall of the central shaft (503). The screening plate (507) holds the screening chamber (502) (504) in place. 2) The interior is divided into non-interconnected spaces. An arc plate one (508) is fixedly installed on the top left end of the screening plate (507), and an arc plate two (509) is fixedly installed on the bottom right end of the screening plate (507). The outer surfaces of the arc plate one (508) and the arc plate two (509) are attached to the inner wall of the screening chamber (502). The inner diameters of the feed inlet (504), the discharge outlet (505), and the distribution outlet (506) are the same. The outer diameters of the arc plate one (508) and the arc plate two (509) are larger than the inner diameters of the feed inlet (504), the discharge outlet (505), and the distribution outlet (506). A driving component (8) is provided at the rear of the screening chamber (502), and the driving component (8) is connected to the central shaft (503) in a transmission manner. The driving component (8) includes a manual driving structure, which includes a connecting plate (803), a support plate (809), an upper limit plate (8010), and a lower limit plate (8011). The connecting plate (803) is fixedly installed on the rear end of the central shaft (503). A rotating arm (804) is fixedly installed on the back of the connecting plate (803). A guide groove (805) is provided on the top of the rotating arm (804). The guide groove (805) is close to the left end of the rotating arm (804). 5) The internal sliding arrangement is provided with a slide table (806), and a pull rope (807) is fixedly installed at the bottom of the slide table (806). A counterweight (808) is fixedly installed at the bottom end of the pull rope (807). The support plate (809), the upper limit plate (8010), and the lower limit plate (8011) are fixedly installed on the back of the screening chamber (502). The counterweight (808) rests on the support plate (809). The right end of the rotating arm (804) is located between the upper limit plate (8010) and the lower limit plate (8011).

2. The low-grade ore recovery and crushing device according to claim 1, characterized in that: The outer wall of the screening chamber (502) is fixedly installed with a material distribution pipe (6) and a discharge pipe (7). The material distribution pipe (6) is connected to the material distribution port (506), and the discharge pipe (7) is connected to the discharge port (505).

3. The low-grade ore recovery and crushing device according to claim 1, characterized in that: The inner wall of the main body (3) of the crushing equipment is fixedly installed with a guide block (9). There are two guide blocks (9) and they are parallel to the crushing roller inside the main body (3). The outer wall of the guide block (9) facing the crushing roller is fixedly installed with crushing teeth (10).

4. The low-grade ore recovery and crushing device according to claim 3, characterized in that: A spray frame (11) is fixedly installed on the upper surface of the guide block (9), and a spray head (12) is fixedly installed on the outer wall of the spray frame (11) facing the crushing roller.

5. The low-grade ore recovery and crushing device according to claim 1, characterized in that: The outer walls of the first arc plate (508) and the second arc plate (509) are provided with water-permeable holes. The left half of the sieve plate (507) is a flat plate, and the right half of the sieve plate (507) is a slanted plate.

6. The low-grade ore recovery and crushing device according to claim 1, characterized in that: A guide plate (19) is fixedly installed on the bottom inner wall of the equipment housing (1), with the front end of the guide plate (19) facing the discharge port (4).

7. The low-grade ore recovery and crushing device according to claim 1, characterized in that: The outer wall of the mounting frame (2) is fixedly installed with a feeding bin (13), the inner side of the feeding bin (13) is fixedly installed with a slide rail (14), the outer wall of the feeding bin (13) is fixedly installed with a second geared motor (18), the output end of the second geared motor (18) is fixedly installed with a reciprocating screw (15), the outer wall of the reciprocating screw (15) is threaded with a slider (16), the slider (16) is slidably disposed in the slide rail (14), and the bottom of the slider (16) is rotatably connected to a feeding rod (17) through a bearing.

8. A crushing process utilizing a low-grade ore recovery and crushing device according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Use conveying equipment to transport the ore into the feed silo (13); S2. Move the material-pulling rod (17) left and right to push the ore to the left and right; S3. The ore falls from the feed bin (13) into the main body (3) of the crushing equipment and is crushed by the crushing rollers inside the main body (3); S4. Turn on the spray head (12) to spray water onto the crushing roller; S5. The crushed ore enters the screening bin (502) from the feed inlet (504); S6. The ore falls onto the screening plate (507) and is screened. Small ore passes through the screening plate (507) and is discharged from the discharge port (505), while large ore remains on the screening plate (507). S7. The screen plate (507) is driven to rotate by the central shaft (503), so that the screen plate (507) rotates back and forth at a small angle. When the feed opening (506) is not blocked by the arc plate (509), the large ore is thrown into the feed opening (506). S8. When a lot of ore remains in the screening plate (507), the central shaft (503) drives the screening plate (507) to rotate at a large angle, so that the feed outlet (506) is completely exposed. At this time, the feed inlet (504) is blocked by the arc plate (508), and the large ore on the screening plate (507) is discharged from the feed outlet (506).

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