Ore feeding device and layer screening equipment

Abstract

The utility model provides an ore feeding device and layer screening equipment. The ore feeding device comprises a first cover plate and a bottom frame located on one side of the first cover plate. A first opening is formed in the first cover plate and is used for ore pulp to pass through; the bottom frame is provided with a discharging port, and the discharging port is used for ore pulp to flow into a screen of the layer screening device. Orthographic projections of the discharge port and the first opening on the plane where the bottom frame is located do not coincide. According to the scheme, after flowing into the feeding device from a high position, ore pulp does not directly fall into the screen, but falls into the screen through the discharge port after being buffered by the bottom frame of the feeding device, so that the ore pulp is prevented from directly falling into the screen through the feeding device, the impact on the screen is reduced, the condition that the ore pulp blocks screen holes of the screen is improved, and the service life of the ore pulp is prolonged. The abrasion of the screen is reduced, the consumption of the screen is reduced, the layer screening efficiency of the screen is improved, the service life of the ore feeding device and the screen is prolonged, and the fault rate of the ore feeding device and the screen is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ore grinding and beneficiation technology, and in particular to a feeding device and a layer screening device. Background Technology

[0002] In iron ore grinding and beneficiation processes, stacked screens are important production equipment used for wet screening to classify iron ore particles. During production, stacked screens suffer from problems such as uneven screen wear, easy clogging of screen holes, rapid wear of the feeding device, and a high proportion of fine particles in the screened product. The main reason for these problems is that the feeding device of the stacked screen cannot evenly feed the slurry onto the screen mesh. Utility Model Content

[0003] In view of this, the present invention proposes a feeding device and a layered screen equipment, which solves the problems in the existing layered screen equipment where the slurry cannot be evenly distributed to the screen due to the structural defects of the feeding device, resulting in uneven screen wear, easy clogging of screen holes, rapid wear of the feeding device, and a high proportion of fine particles in the screened product.

[0004] On one hand, this utility model embodiment provides a ore feeding device, which includes:

[0005] A first cover plate, the first cover plate having a first opening for the passage of slurry;

[0006] A bottom frame located on one side of the first cover plate has a discharge port for allowing slurry to flow into the bottom frame and thus into the screen of the layered screen device; wherein...

[0007] The discharge port and the first opening do not coincide on the plane of the bottom frame.

[0008] In some embodiments, the bottom frame also has a buffer section and a flow guide section, the buffer section, the flow guide section and the discharge port are connected in sequence, and the buffer section is arranged opposite to the first opening.

[0009] In some embodiments, the buffer section includes a base plate and a first side plate, a second side plate, a third side plate, and a fourth side plate respectively connected to the base plate. The buffer section is connected to the base plate of the flow guide section through the first side plate.

[0010] The distance between the bottom plate of the buffer section and the first opening is L1, the distance between the end of the guide section connected to the buffer section and the first opening is L2, and the distance between the end of the bottom plate of the guide section connected to the discharge port and the first opening is L3. The relationship between L1, L2 and L3 is: L2 < L3 < L1.

[0011] In some embodiments, the feeding device further includes a plurality of guide bars disposed on the bottom plate of the guide section.

[0012] In some embodiments, the ore feeding device further includes: a first splash guard and a second splash guard;

[0013] The discharge port includes a first side plate connected to the flow guide and a second side plate corresponding to the first side plate. A first splash curtain is disposed on the first side plate and a second splash curtain is disposed on the second side plate.

[0014] In some embodiments, the feeding device further includes:

[0015] A first bracket connected to the second side plate and a second bracket connected to the fourth side plate are respectively used to connect the layer screen device.

[0016] In some embodiments, the side of the first cover plate facing the bottom frame is covered with a ceramic liner; the inner wall of the bottom frame is covered with a ceramic liner.

[0017] In some embodiments, the feeding device further includes:

[0018] Second cover plate;

[0019] The first cover plate is also provided with a second opening, the second cover plate is arranged opposite to the second opening, and is detachably connected to the first cover plate.

[0020] In some embodiments, the feeding device also includes a flange connected to the first opening.

[0021] On the other hand, this utility model embodiment also provides a layer screening device, which includes: a layer screening device and a feeding device as described in any of the above embodiments connected to the layer screening device.

[0022] This utility model has at least the following beneficial effects:

[0023] This utility model provides a feeding device and a layered screening device. The feeding device provided by this utility model includes: a first cover plate and a bottom frame located on one side of the first cover plate. The first cover plate has a first opening for the passage of slurry; the bottom frame has a discharge port for the slurry to flow into the screen of the layered screening device; the orthographic projection of the discharge port and the first opening on the plane of the bottom frame does not coincide. Therefore, after the slurry flows from a height through the first opening on the first cover plate into the bottom frame of the feeding device, it does not fall directly into the screen, but is buffered by the bottom frame and then falls into the screen through the discharge port. This avoids the slurry falling directly into the screen through the feeding device, reduces the impact on the screen, improves the clogging of the screen holes by the slurry, reduces screen wear, reduces screen consumption, improves the layered screening efficiency of the screen, and increases the service life of the feeding device, screen, and layered screening device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of a ore feeding device provided in related technologies;

[0026] Figure 2 This is a schematic diagram of the structure of a ore feeding device provided in an embodiment of the present utility model;

[0027] Figure 3a A front view of a first splash guard and a second splash guard provided for embodiments of this utility model;

[0028] Figure 3b for Figure 3a Side view of the first and second splash curtains.

[0029] [Explanation of Labels in the Attached Image]

[0030] 2: Feed inlet; 3: Rear side panel; 4: Left side panel; 5: Front side panel; 6: Discharge outlet; 7: Support frame; 8: Right side panel;

[0031] 10: First cover plate; 11: First opening; 12: First bolt hole;

[0032] 20: Base frame; 21: Discharge port; 211: First side plate of discharge port; 212: Second side plate of discharge port; 213: Third side plate of discharge port; 214: Fourth side plate of discharge port; 22: Flow guide; 221: Base plate of flow guide; 222: Flow guide strip; 23: Buffer section; 232: First side plate of buffer section; 233: Second side plate of buffer section; 234: Third side plate of buffer section; 235: Fourth side plate of buffer section; 236: First bracket; 237: Second bracket; 238: Third bolt hole;

[0033] 30: First splash guard; 40: Second splash guard; 50: Second cover plate; 60: Flange; 61: Fourth bolt hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to specific examples and accompanying drawings.

[0035] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0036] In iron ore grinding and beneficiation processes, stacked screens are crucial production equipment used for wet screening to classify iron ore particles. During production, stacked screens suffer from problems such as easy clogging of screen holes, uneven screen wear, rapid wear of the feeding device, and a high proportion of fine particles in the screened product. The main reason for these problems is structural defects in the feeding device of the stacked screen.

[0037] After the slurry enters the collection box, it is distributed to the screens of the stacked screen through pipelines and feeding devices. Figure 1 A schematic diagram of a ore feeding device provided in the related art is shown. For example... Figure 1 The feeding device shown includes: inlet 2, frame box and support 7. The frame box includes front side plate 5, left side plate 4, rear side plate 3 and right side plate 8. The slurry falls from a height and enters the feeding device from inlet 2 and flows out from outlet 6.

[0038] Due to such Figure 1 The feeding device shown is a vertical, flat, trumpet-shaped device. When slurry falls from a height (e.g., more than 1 meter away from the feeding device), it is difficult to spread it along the trumpet opening. This results in uneven distribution of slurry onto the screen through the feeding device, leading to problems such as screen hole blockage, uneven screen wear, rapid wear of the feeding device, and a high proportion of fine particles in the product on the screen. This affects the screening efficiency of the stacked screen, increases the circulating load, has a significant impact on production, and also increases operating costs and the probability of failure.

[0039] In view of this, in order to solve at least one of the above technical problems, this utility model provides a ore feeding device and a layer screening device.

[0040] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0041] The first aspect of this utility model embodiment provides a ore feeding device. For example... Figure 2 As shown, the feeding device includes a first cover plate 10 and a bottom frame 20 located on one side of the first cover plate 10. The first cover plate 10 has a first opening 11 for passing slurry. The bottom frame 20 has a discharge port 21 for passing slurry flowing into the bottom frame, so that the slurry flows into the screen of the layered screening device. The discharge port 21 and the first opening 11 do not coincide in their orthographic projections onto the plane of the bottom frame 20.

[0042] The feeding device provided in this embodiment can be applied to layered screening equipment, such as single-layer screens and stacked screens, and is not specifically limited thereto. Layered screening equipment may include a layered screening device, which may include a screen and a frame for connecting the feeding device.

[0043] The first cover plate 10 and the bottom frame 20 can be made of metal, such as stainless steel.

[0044] In this invention, the orthographic projections of the discharge port 21 and the first opening 11 on the plane of the bottom frame 20 do not coincide. Therefore, when the feeding device is working, the slurry flows from a height through the first opening 11 on the first cover plate 10 of the feeding device into the bottom frame 20 of the feeding device. It does not fall directly into the screen, but is buffered by the bottom frame 20 before falling into the screen through the discharge port 21. This avoids the slurry falling directly into the screen through the feeding device, reduces the impact and wear of the slurry on the screen, improves the clogging of the screen holes by the slurry, increases the layer screening efficiency of the screen, increases the service life of the feeding device and the layer screening equipment, and reduces the failure rate of the feeding device and the layer screening equipment.

[0045] In some examples, the first cover plate 10 and the bottom frame 20 are detachably connected for ease of disassembly and cleaning. For example, the first cover plate 10 and the bottom frame 20 can be connected by bolts or other means.

[0046] In some examples, such as Figure 2 As shown, the first cover plate 10 is provided with a plurality of first bolt holes 12 for bolts to pass through, and the end face of the bottom frame 20 that abuts against the first cover plate 10 is provided with a plurality of second bolt holes for bolts to pass through. The bolts are passed through the first bolt holes 12 and the second bolt holes and tightened to achieve a detachable connection between the bottom frame 20 and the first cover plate 10.

[0047] In some embodiments of this utility model, such as Figure 2 As shown, the bottom frame 20 also has a buffer section 23 and a flow guide section 22. The buffer section 23, the flow guide section 22 and the discharge port 21 are connected in sequence, and the buffer section 23 is arranged opposite to the first opening 11.

[0048] The slurry falls from a height and flows into the buffer section 23 of the bottom frame 20 of the feeding device through the first opening 11. The buffer section 23 buffers the force generated by the falling slurry. After being buffered by the buffer section 23, the slurry passes through the guide section 22, which guides the slurry to make the distribution of the slurry more uniform. The uniformly distributed slurry falls onto the screen through the discharge port 21.

[0049] Therefore, the feeding device provided by this utility model embodiment can make the slurry fall evenly onto the screen, and can further reduce the impact and wear of the slurry on the screen, further improve the clogging of the screen holes by the slurry, further improve the layer screening efficiency of the screen, further improve the service life of the feeding device and the layer screening equipment, reduce the circulating load, and reduce the failure rate of the feeding device and the layer screening equipment.

[0050] In some embodiments of this utility model, such as Figure 2 As shown, the buffer section 23 may include a base plate and a first side plate 232, a second side plate 233, a third side plate 234, and a fourth side plate 235 respectively connected to the base plate. The buffer section 23 is connected to the base plate 221 of the flow guide section 22 through the first side plate 232.

[0051] The distance between the bottom plate of the buffer section 23 and the first opening 11 is L1, the distance between the end of the flow guide section connected to the buffer section 23 and the first opening 11 is L2, and the distance between the end of the bottom plate 221 of the flow guide section 22 connected to the discharge port 21 and the first opening 11 is L3. The following relationship is satisfied between L1, L2 and L3: L2 < L3 < L1.

[0052] The slurry falls from a height and flows into the buffer section 23 of the bottom frame 20 of the feeding device through the first opening 11. The buffer section 23 buffers the force generated by the falling slurry. By making the distance L1 between the bottom plate of the buffer section 23 and the first opening 11 smaller than the distance L2 between the end of the guide section connecting the buffer section 23 and the first opening 11, the impact force of the slurry on other parts of the bottom frame can be further reduced. The slurry with the further reduced impact force can be more evenly distributed when passing through the guide section 22, so that the slurry falls onto the screen more evenly.

[0053] Therefore, the feeding device provided by this utility model embodiment can make the slurry fall onto the screen more evenly, and can further reduce the impact and wear of the slurry on the screen, further improve the clogging of the screen holes by the slurry, further improve the layer screening efficiency of the screen, further improve the service life of the feeding device and the layer screening equipment, reduce the circulating load, and reduce the failure rate of the feeding device and the layer screening equipment.

[0054] In some examples, the slurry falls from a height and flows into the buffer section 23 of the bottom frame 20 of the feeding device through the first opening 11. The bottom plate of the buffer section 23 will reflect the slurry into the guide section 22 through the reaction force. In order to ensure that all the slurry in the buffer section can be reflected to the guide section 22, the difference ΔL (i.e., L2-L1) between the distance between the bottom plate of the buffer section 23 and the first opening 11 and the distance between the end of the guide section 22 connecting the buffer section 23 and the first opening 11 can be in the range of 150mm to 200mm.

[0055] In some examples, in order to improve the reliability of the feeding device and reduce the wear of the slurry on the buffer section 23, the thickness of the buffer section 23 can be increased so that the thickness of the buffer section 23 is greater than the thickness of the guide section and the discharge port.

[0056] In some examples, in order to improve the reliability of the feeding device and reduce the wear of the slurry on the buffer section 23, a non-metallic lining can be added to the inside of the buffer section 23.

[0057] In some embodiments of this utility model, such as Figure 2 As shown, the ore feeding device may also include: a plurality of guide bars 222 disposed on the bottom plate 221 of the guide section 22.

[0058] The guide bar 222 allows the slurry to fall onto the screen more evenly.

[0059] In some examples, the material of the flow guide 222 can be metal, such as stainless steel, to improve the flow guiding effect of the flow guide.

[0060] In some examples, the guide strip 222 can be welded to the base plate 221 of the guide section.

[0061] In some examples, the cross-section of the guide bar along the X direction can be circular, rectangular, square, or other shapes.

[0062] In some examples, the length of the guide strip 222 is slightly less than the length of the base plate 221 of the guide section. For example, the length of the guide strip 222 can be 90%, 80%, 70%, 60%, etc., of the length of the base plate 221 of the guide section, and no specific limitation is made here. By making the length of the guide strip 222 slightly less than the length of the base plate 221 of the guide section, the guiding effect of the guide strip can be improved.

[0063] In some embodiments of this utility model, such as Figure 3a and 3b As shown, the ore feeding device may also include: a first splash guard 30 and a second splash guard 40.

[0064] Reference Figure 2 , 3a In addition to 3b, the discharge port 21 includes a first side plate 211 connected to the flow guide 22 and a second side plate 212 corresponding to the first side plate 211. A first splash curtain 30 is disposed on the first side plate 211 of the discharge port, and a second splash curtain 40 is disposed on the second side plate 212 of the discharge port.

[0065] The first splash curtain 30 and the second splash curtain 40 can prevent slurry splashing and improve the cleanliness of the feeding device.

[0066] In some examples, the length of the first splash curtain 30 along the Z direction is greater than the length of the second splash curtain 40 along the Z direction. By making the length of the first splash curtain 30 along the Z direction greater than the length of the second splash curtain 40 along the Z direction, the flow direction of the slurry can be guided, allowing the slurry to flow along the direction of the exposure surface.

[0067] In some examples, the first splash curtain 30 and the second splash curtain 40 are connected to the outlet side plate in a detachable manner, such as by bolts, which facilitates the disassembly of the first splash curtain 30 and the second splash curtain 40.

[0068] In some examples, the materials of the first splash curtain 30 and the second splash curtain 40 can be non-metallic materials, such as polyurethane.

[0069] In some examples, the feeding device may also include a first pressure plate and a second pressure plate. The first pressure plate and the first splash curtain 30 are connected to the first side plate 211 of the guide section by bolts, thereby reducing the wear of the bolts on the first splash curtain 30.

[0070] The second pressure plate and the second splash curtain 40 are connected to the second side plate 212 of the flow guide by bolts, thereby reducing the wear of the bolts on the second splash curtain 40.

[0071] In some examples, the length of the first splash curtain 30 along the Y direction may be greater than the length of the second splash curtain 40 along the Y direction.

[0072] The discharge port may also include a third side plate 213 and a fourth side plate 214. This allows the first splash guard 30 to extend onto the third side plate 213 and the fourth side plate 214 of the discharge port, thereby further improving the splash guard's splash-proof effect and its flow guiding effect.

[0073] In some embodiments of this utility model, such as Figure 2 As shown, the feeding device may further include: a first support 236 connected to the second side plate 233 of the buffer section and a second support 237 connected to the fourth side plate 235 of the buffer section.

[0074] The first support 236 and the second support 237 are used to connect the layer screen device, respectively.

[0075] In some examples, the first support 236 and the second support 237 are detachably connected to the sieve assembly. Taking the first support 236 as an example, the connection method between the support and the sieve assembly will be explained.

[0076] The first support 236 may have a groove that runs through the support along its length. The first support 236 is provided with a third bolt hole 238 at one end away from the buffer part 23. When the first support 236 is connected to the frame of the layer screening device, the frame of the layer screening device can be inserted into the groove and abut against the end of the first support 236 provided with the third bolt hole 238. The first support 236 is connected to the frame of the layer screening device by passing the bolt through the third bolt hole 238 of the first support 236 and the bolt hole of the frame of the layer screening device in sequence.

[0077] In some embodiments of this utility model, such as Figure 2 As shown, the side of the first cover plate 10 facing the bottom frame 20 is covered with a ceramic lining; the inner wall of the bottom frame 20 is covered with a ceramic lining.

[0078] Ceramic linings can increase the wear resistance of the feeding device and extend its service life.

[0079] In some examples, such as Figure 2 As shown, ceramic linings can be laid on the side of the bottom frame 20 where components such as the buffer section 23, the guide section 22, the discharge port 21, and the guide strip 222 can directly contact the slurry, thereby improving the wear resistance and service life of the feeding device.

[0080] In some embodiments of this utility model, such as Figure 2 As shown, the ore feeding device may also include a second cover plate 50. The first cover plate 10 is still provided with a second opening (not shown), the second cover plate 50 is disposed opposite to the second opening, and is detachably connected to the first cover plate 10.

[0081] The material of the second cover plate 50 can be metal, such as stainless steel. The second cover plate 50 can be connected to the first cover plate 10 by bolts, thereby facilitating the maintenance and unblocking of the ore feeding device.

[0082] In some embodiments of this utility model, such as Figure 2 As shown, the feeding device may also include a flange 60 connected to the first opening 11.

[0083] As the slurry falls from the slurry collection tank, it flows through the hose into the first opening 11 of the feeding device, and then into the bottom frame 20 of the feeding device. A sleeve flange can be installed at the end of the hose near the first switch. This sleeve flange is detachably connected to the flange 60 of the feeding device located at the first opening 11. This facilitates the maintenance and unblocking of the feeding device, and also improves the reliability of the connection between the hose and the feeding device, reducing the failure rate.

[0084] like Figure 2As shown, the flange 60 may be provided with a fourth bolt hole 61. The flange 60 of the feeding device can be detachably connected to the sleeve flange by bolts passing through the fourth bolt hole 61.

[0085] Based on the same concept, according to another aspect of the present invention, an embodiment of the present invention also provides a layer screening device, which includes: a layer screening device and a feeding device as described in any of the above embodiments connected to the layer screening device.

[0086] Specifically, the slurry collection tank can include: a slurry collection tank, a feeding device, and a slurry collection tank. The slurry collection tank is connected to the feeding device via a hose, and the feeding device is connected to the slurry collection tank via a frame.

[0087] When the layered screening equipment is working, the slurry falls from the slurry collection tank and flows through the hose into the feeding device. The feeding device buffers and diverts the slurry, then evenly flows it onto the screen of the layered screening equipment. Because the slurry does not fall directly onto the screen, but is buffered by the bottom frame of the feeding device before falling into the screen, the impact and wear of the slurry on the screen are reduced, the clogging of the screen holes by the slurry is improved, the layered screening efficiency of the screen is increased, the service life of the feeding device and the layered screening equipment is extended, and the failure rate of the feeding device and the layered screening equipment is reduced.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A ore feeding device, characterized in that, include: A first cover plate, wherein the first cover plate is provided with a first opening for the passage of slurry; A bottom frame located on one side of the first cover plate, the bottom frame having a discharge port for allowing slurry flowing into the bottom frame to flow into the screen of the layered screening device; wherein... The discharge port and the first opening do not coincide on the orthographic projection of the plane where the bottom frame is located.

2. The ore feeding device according to claim 1, characterized in that, The bottom frame also has a buffer section and a flow guide section, the buffer section, the flow guide section and the discharge port are connected in sequence, and the buffer section is arranged opposite to the first opening.

3. The ore feeding device according to claim 2, characterized in that, The buffer section includes a base plate and a first side plate, a second side plate, a third side plate, and a fourth side plate respectively connected to the base plate. The buffer section is connected to the base plate of the flow guide section through the first side plate. Wherein, the distance between the bottom plate of the buffer section and the first opening is L1, the distance between the end of the guide section connected to the buffer section and the first opening is L2, and the distance between the end of the bottom plate of the guide section connected to the discharge port and the first opening is L3. L1, L2, and L3 satisfy the following relationship: L2 < L3 < L1.

4. The ore feeding device according to claim 2, characterized in that, Also includes: Several guide strips are provided on the bottom plate of the guide section.

5. The ore feeding device according to claim 2, characterized in that, Also includes: First splash guard and second splash guard; The discharge port includes a first side plate connected to the flow guide and a second side plate corresponding to the first side plate. The first splash curtain is disposed on the first side plate and the second splash curtain is disposed on the second side plate.

6. The ore feeding device according to claim 3, characterized in that, Also includes: A first bracket connected to the second side plate and a second bracket connected to the fourth side plate, the first bracket and the second bracket being used to connect the layer sieve device.

7. The ore feeding device according to any one of claims 1 to 6, characterized in that, The side of the first cover plate facing the bottom frame is covered with a ceramic liner; The inner wall of the bottom frame is covered with a ceramic lining.

8. The ore feeding device according to any one of claims 1 to 6, characterized in that, Also includes: Second cover plate; The first cover plate is also provided with a second opening, the second cover plate is disposed opposite to the second opening, and is detachably connected to the first cover plate.

9. The ore feeding device according to any one of claims 1 to 6, characterized in that, Also includes: A flange connected to the first opening.

10. A layer screening device, characterized in that, include: The sieve device and the feeding device connected to the sieve device as described in any one of claims 1 to 9.

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