Pellet ore unloading anti-crushing and anti-pulverization device
By designing a combined structure of a spiral unloading chute, a transition chute, a tapered receiving plate and a guide ring plate, the problem of crushing and pulverizing of pellets during unloading is solved, and uniform distribution and efficient storage of materials are achieved.
Patent Information
- Application Number
- CN202422929976.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-28
AI Technical Summary
During the pellet unloading process, existing technologies cannot effectively avoid or reduce the crushing and pulverization phenomenon, especially during storage in large warehouses, which leads to material loss and environmental pollution.
A spiral-structured discharge chute and transition chute are designed, combined with a conical receiving plate and a guide ring plate. Through the circumferential uniform distribution of the spiral discharge chute and the inclined setting of the guide ring plate, the falling height of the material and local accumulation are reduced, avoiding direct impact and crushing.
It significantly reduces the crushing and pulverization during the pellet unloading process, improves the uniform distribution and storage efficiency of the material, and reduces the risk of material loss and environmental pollution.
Smart Images
Figure CN223409020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pellet storage using large silos, in particular to a technology for preventing pellets from being crushed and pulverized during pellet storage and unloading. Background Art
[0002] With the country's increasingly stringent environmental protection requirements, my country's steel companies have fully implemented ultra-low emission standards. In particular, with regard to controlling fugitive emissions, major steel companies, design firms, and research institutes have actively responded, researching and applying a series of effective emission reduction measures tailored to various operating conditions, achieving significant environmental results. Among these measures, pellets, a key feedstock for blast furnace ironmaking and mini-process steelmaking, are highly favored due to their uniform particle size and high iron grade. Increasing the proportion of pellets in blast furnaces and promoting mini-process steelmaking technology have positive implications for reducing carbon emissions in the steelmaking process.
[0003] To address pellet storage issues, large-scale silo storage technology has emerged. This technology involves building large silos to store pellets. However, due to the large diameter and high elevation of the silo's center (for example, a silo with a storage capacity of 100,000 tons and a diameter of 56 meters may have a center elevation of over 30 meters), the pellets inevitably break down and pulverize during unloading from the center of the silo. Utility Model Content
[0004] The utility model aims to provide a device for preventing pellet unloading from crushing and pulverization, which can reduce or avoid the crushing of pellets during unloading by improving the structure of a pellet storage device.
[0005] To achieve the above-mentioned purpose, the utility model provides a device for preventing pellets from being crushed and pulverized. The device for preventing pellets from being crushed and pulverized includes a silo body, and a feed port is provided at the top of the silo body; the device for preventing pellets from being crushed and pulverized also includes a discharge chute, which extends spirally along the height direction of the silo body and is directly or indirectly fixedly connected to the silo body. The top of the discharge chute is used to receive materials from the feed port, and the discharge chute is provided with a plurality of distribution ports evenly distributed along the circumference of the discharge chute.
[0006] By providing a spiral-structured discharge chute, the top of which receives the material, the material gradually slides down to the bottom of the bin under the guidance of the spiral structure. This significantly prevents the pellets from falling and breaking during the discharge process. Furthermore, the chute has evenly distributed distribution openings around its circumference. As the material falls, materials of varying weights are ejected outward under the influence of gravity. This distributes the pellets' drop locations along the circumference of the chute, preventing the pellets from being discharged entirely from the bottom of the chute to the bottom of the bin, leading to localized accumulation.
[0007] Optionally, the pelletizing anti-crushing and pulverization device further includes a linearly extending transition trough, with the leading end of the transition trough facing the feed inlet and the trailing end facing the top of the discharge trough; the transition trough gradually slopes outward from top to bottom. By providing a transition trough connecting the feed inlet and the discharge trough, the initial velocity of the material is increased; at the same time, the material is prevented from directly falling from the feed inlet into the discharge trough and impacting the discharge trough.
[0008] Optionally, the discharge chute is arranged around a central axis extending in the height direction; the top end of the transition chute is located on the central axis; and the bottom end of the transition chute is spaced horizontally from the central axis. Thus, the initial position of the material's descent can be set beside the dispensing opening, ensuring orderly descent of the material.
[0009] Optionally, the pelletizing anti-crushing and pulverization device further comprises a conical receiving plate, wherein the tip of the receiving plate protrudes toward the side near the discharge chute in the height direction. The tip of the receiving plate protrudes toward the side of the discharge chute, thereby guiding the material and preventing local accumulation of the material.
[0010] Optionally, the central axis passes through the tip, which is beneficial for uniform distribution of the material in the circumferential direction.
[0011] Optionally, the radial dimension of the discharge chute is smaller than the radial dimension of the receiving plate, thereby enabling the collection of materials circumferentially around the discharge chute.
[0012] Optionally, the anti-crushing and pulverization device of the pelletized ore also includes a guide ring plate, which has an inner ring side and an outer ring side, the inner ring side is used to connect with the edge of the receiving plate, and the outer ring side is fixed to the silo body; from the outer ring side toward the inner ring side, the guide ring plate gradually tilts downward.
[0013] By setting a guide ring plate as another material receiving area outside the material receiving plate, materials at a higher position of the discharge chute can be received; the guide ring plate is set at an angle, so that materials that escape from a higher position of the discharge chute can first contact the guide ring plate and then slide into the area where the material receiving plate is located. In this way, the falling height of these materials is effectively reduced, thereby avoiding the crushing of these materials.
[0014] Optionally, in the height direction, the inner ring side of the guide ring plate is opposite to the edge of the receiving plate; and is located above the edge of the receiving plate, thereby saving the horizontal dimension of the storage device while ensuring material receiving.
[0015] Optionally, the pelletizing anti-crushing and pulverization device further includes a plurality of vertically extending columns, the top and bottom ends of which are directly or indirectly fixed to the silo body; the plurality of vertical columns are arranged around the discharge chute and fixedly connected to the discharge chute. The provision of the vertical columns connects the discharge chute to the silo body and reduces interference with the discharged material.
[0016] Optionally, the columns are staggered with respect to the material distribution opening in the circumferential direction of the discharge chute, thereby further reducing the interference between the columns and the discharged material.
[0017] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.
[0019] Figure 1 This is a schematic structural diagram of a device for preventing pellet unloading from crushing and pulverization in an embodiment of the present invention;
[0020] Figure 2 yes Figure 1 Cross-section along line AA.
[0021] Figure numerals: 1-belt conveyor; 2-feeding port; 3-transition chute; 4-discharging chute; 5-column; 6-level meter; 7-sedimentation observation point; 8-receiving plate; 9-guide ring plate; 10-bin body. DETAILED DESCRIPTION
[0022] The utility model provides a device for preventing pellet ore from being crushed and pulverized during unloading. By improving the structure of a pellet ore storage device, the crushing during unloading of the pellet ore can be reduced or avoided.
[0023] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.
[0024] Relational terms such as “first” and “second” are used merely to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.
[0025] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic structural diagram of a device for preventing pellet unloading from crushing and pulverization in an embodiment of the present invention; Figure 2 yes Figure 1 Cross-section along line AA.
[0026] The present invention provides a device for preventing pellets from being crushed and pulverized during unloading. The device includes a silo 10 with a feed port 2 defined at the top. The feed port 2 is adapted to engage a belt conveyor 1 disposed at the top of the silo 10. Material is conveyed to the feed port 2 by the belt conveyor 1. In one embodiment, the material is pellets, and the particle size of the pellets can range from 8 mm to 16 mm, or other particle size ranges, by adjusting the corresponding parameters of the storage device described herein.
[0027] The pellet crushing and pulverization prevention device also includes a discharge chute 4. The central axis of the discharge chute 4 extends spirally along the height of the silo 10 and is directly or indirectly fixedly connected to the silo 10. The central axis extends along the height direction. When the discharge chute 4 is projected in the height direction, the discharge chute 4 forms a closed circular ring. The closed circular rings formed by projecting the discharge chute 4 at any height can overlap in the height direction.
[0028] By providing a spiral-structured discharge chute 4, the top of which receives the material, the material gradually slides to the bottom of the bin under the guidance of the spiral structure. This method can significantly prevent the pellets from being crushed and pulverized during the discharge process.
[0029] In the above embodiment, the top of the discharge chute 4 receives material from the feed port 2. The discharge chute 4 is provided with a plurality of dispensing openings 11 evenly distributed along the circumference of the discharge chute 4. Dispensing openings 11 allow material to be ejected by inertia as it slides down the discharge chute 4. Dispensing openings 11 can be intermittent or continuous.
[0030] For example, the discharge chute 4 may include a first trough plate and a second trough plate, with the first trough plate and the second trough plate being arranged at an angle, extending generally horizontally and the second trough plate generally vertically. Projecting the first trough plate in the height direction forms the aforementioned closed circular ring. The second trough plate is arranged on the outer side of the first trough plate, leaving the inner side of the first trough plate unobstructed.
[0031] Alternatively, the first slot plate is further connected to a third slot plate, and the third slot plate is provided with a plurality of openings in its spiral direction, and these openings serve as material distribution openings.
[0032] The second trough plate interacts with the first trough plate to partially stop the descending material, allowing it to roll along the discharge chute 4. As the pellets roll downward, due to their varying particle sizes and weights, they escape from the chute 4 at different heights, forming a parabolic shape before falling to the bin floor. This ensures that pellets fall to the bin floor along the entire height of the chute 4. This creates a number of discharge points distributed circumferentially around the chute 4 on one side of the bin floor. The remaining pellets within the chute 4 that do not escape automatically fall to an area on the bin floor that is opposite the chute 4 in height.
[0033] The discharge chute 4 is also provided with evenly distributed material distribution openings 11 along the circumference. During the falling process of the materials, materials of different weights are ejected outwards under the action of gravity acceleration. This can form a plurality of drop points distributed along the circumference of the discharge chute 4 in the silo 10. This can prevent the pellets from being discharged entirely from the lower part of the discharge chute 4 into the silo 10, resulting in localized accumulation of materials.
[0034] In the above technical solution, the pellets can roll in the discharge chute 4 due to the special structure of the pellets, which makes it easier for them to escape outwards under the action of potential energy.
[0035] In the above embodiment, the pelletizing device also includes a linear transition chute 3. The transition chute 3 is a straight chute, with its head end facing the feed inlet 2 and its tail end facing the top of the discharge chute 4. The transition chute 3 slopes gradually outward from top to bottom. By providing a transition between the feed inlet 2 and the discharge chute 4, the transition chute 3 provides an initial velocity for the material to descend. It also prevents material from directly falling from the feed inlet 2 into the discharge chute 4 and impacting the chute 4.
[0036] In this embodiment, the top of the transition trough 3 is located on the central axis; the bottom of the transition trough 3 is horizontally spaced from the central axis. A projection of the transition trough 3 in the height direction forms a projection extending radially from the center of the projection of the annular discharge chute 4. This allows the initial position of material flow to be positioned adjacent to the dispensing opening 11, ensuring an orderly flow of material.
[0037] In other embodiments, the structure of the material receiving portion of the silo bottom is modified accordingly. The device for preventing pellet crushing and pulverization also includes a conical receiving plate 8 disposed below the discharge chute 4. The tip of the receiving plate 8 protrudes vertically toward the side closest to the discharge chute 4. This protrusion toward the side of the discharge chute 4 guides the material and prevents localized accumulation. The central axis passes through the tip, which promotes uniform circumferential distribution of the material.
[0038] In this embodiment, the bottom of the discharge chute 4 is not directly aligned with the tip in height, but rather radially away from the central axis. This is because as the pellets roll out of the bottom of the discharge chute 4, their potential energy causes them to fall radially along a specific path, with the tip located along this path. Consequently, upon contacting the tip, the conical receiving plate 8 disperses the pellets from the tip to the surrounding area. This further prevents localized accumulation of material.
[0039] Optionally, the radial dimension of the discharge chute 4 is smaller than the radial dimension of the receiving plate 8. Thus, the material in the circumference of the discharge chute 4 can be collected.
[0040] In another embodiment, the device for preventing pellets from being crushed and pulverized further includes a guide ring plate 9, which has an inner ring side and an outer ring side. The inner ring side is used to connect with the edge of the receiving plate 8, and the outer ring side is fixed to the silo body 10; from the outer ring side toward the inner ring side, the guide ring plate 9 gradually tilts downward.
[0041] In this way, a accommodating space with an annular groove is formed at the bottom of the warehouse. In this way, the circumferential space of the warehouse bottom can be effectively utilized for storage.
[0042] By setting the guide ring plate 9 as another material receiving area outside the material receiving plate 8, the material at a higher position of the discharge chute 4 can be received; the guide ring plate 9 is set at an angle, so that the material escaped from the higher position of the discharge chute 4 can first contact the guide ring plate 9 and then slide into the area where the material receiving plate 8 is located. In this way, the falling height of these materials is effectively reduced, thereby avoiding the crushing of these materials.
[0043] In another embodiment, in the height direction, the inner ring side of the guide ring plate 9 is opposite to the edge of the receiving plate 8; and is located above the edge of the receiving plate 8, thereby saving the horizontal dimension of the storage device while ensuring the receiving of materials.
[0044] That is to say, a baffle is connected between the edge of the guide ring plate 9 and the material receiving plate 8. The baffle extends in the height direction, one end of which is connected to the guide ring plate 9 and the other end is connected to the material receiving plate 8, so as to increase the material holding space at the bottom of the warehouse.
[0045] The connection between the discharge chute 4 and the silo 10 is described below. The pellet ore anti-crushing and pulverization device also includes a plurality of columns 5 extending in the height direction. The top and bottom ends of the columns 5 are directly or indirectly fixed to the silo 10. The plurality of columns 5 are arranged around the discharge chute 4 and are fixedly connected to the discharge chute 4. The provision of the columns 5 ensures the connection between the discharge chute 4 and the silo, while also reducing interference with the discharged material.
[0046] Optionally, the columns 5 and the material distribution opening are staggered in the circumferential direction of the discharge chute 4. This can further reduce the interference between the columns 5 and the discharging material.
[0047] Of course, in addition to the vertically extending columns 5, horizontally extending columns 5 may also be used to connect the discharge chute 4. Those skilled in the art may make their own settings.
[0048] Example 1
[0049] The technical solution of this application is described below with a specific embodiment.
[0050] Due to the excellent fluidity of the pellets, finished pellets with a particle size between 8 and 16 mm are continuously unloaded into the feed port 2 via a belt conveyor 1. The material from the feed port 2 first falls into a linearly extending transition trough 3, where it rolls downward. The angle between the transition trough 3 and the central axis is greater than the material's angle of repose, allowing the material to have an initial flow velocity. Under the action of gravity, pellets with different kinetic energies that fall from the transition trough 3 into the discharge trough 4 can all escape from the discharge trough 4 through the distribution port 11 along the circumference and fall to the bottom of the bin along a parabolic path. Due to the different particle sizes, kinetic energies, and deadweights of the pellets, pellets fall to the bottom of the bin throughout the entire height of the discharge trough 4. As the pellets are continuously unloaded, they gradually fill up evenly along the circumference from the bottom of the bin.
[0051] In the above embodiment, the feed port 2 is welded to the transition trough 3. The angle between the transition trough 3 and the central axis is greater than 48°. The bottom of the transition trough 3 is welded to the discharge chute 4. The width of the discharge chute 4 can be adjusted according to the radial dimension of the silo 10, and its optional width range is between 0.8m and 1.2m.
[0052] The silo 10 comprises a steel structure main body and a concrete structure base. The diameter of the silo 10 is between 10 and 60 meters, and the diameter and straight section height are determined according to the required storage capacity of the single silo.
[0053] Optionally, a material level meter 6 is provided on the top of the silo for observing the material level of the pellets. The material level meter 6 can be interlocked with the belt conveyor 1 to stop feeding when the material level is high.
[0054] Several settlement observation points 7 are provided on the outer wall of the silo body to monitor the settlement and stability of the silo foundation.
[0055] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims
1. A device for preventing pellet unloading from crushing and pulverization, characterized in that: It comprises a silo (10), wherein a feed port (2) is provided at the top of the silo (10); The pellet ore anti-crushing and pulverization device further comprises a discharge chute (4), the discharge chute (4) extending in a spiral shape along the height direction of the bin body (10), and being directly or indirectly fixedly connected to the bin body (10), the top end of the discharge chute (4) being used to receive the material from the feed port (2), and the bottom end being used to discharge part of the material, the discharge chute (4) further comprising a plurality of distribution openings (11), the plurality of distribution openings (11) being evenly distributed along the circumference of the discharge chute (4).
2. The device for preventing pellet discharge from crushing and pulverization according to claim 1, characterized in that: It also includes a transition groove (3) extending in a straight line, wherein the head end of the transition groove (3) is opposite to the feed port (2), and the tail end is opposite to the top end of the discharge groove (4); the transition groove (3) is gradually inclined outward from top to bottom in the height direction.
3. The device for preventing pellet discharge from crushing and pulverization according to claim 2, characterized in that: The discharge chute (4) is arranged around a central axis, and the central axis extends in a height direction; The top end of the transition groove (3) is located on the central axis; The bottom end of the transition groove (3) is spaced apart from the central axis in the horizontal direction.
4. The device for preventing pellet discharge from crushing and pulverization according to claim 3, characterized in that: It also includes a material receiving plate (8) arranged in a conical shape, wherein in the height direction, the tip of the material receiving plate (8) protrudes toward the side close to the discharge trough (4).
5. The device for preventing pellet unloading from crushing and pulverization according to claim 4, characterized in that: The central axis passes through the tip.
6. The device for preventing pellet discharge from crushing and pulverization according to claim 5, characterized in that: The radial dimension of the discharge trough (4) is smaller than the radial dimension of the receiving plate (8).
7. The device for preventing pellet unloading from crushing and pulverization according to claim 5, characterized in that: It also includes a guide ring plate (9), the guide ring plate (9) having an inner ring side and an outer ring side, the inner ring side is used to connect with the edge of the receiving plate (8), and the outer ring side is fixed to the warehouse body (10); From the outer ring side toward the inner ring side, the guide ring plate (9) gradually tilts downward.
8. The device for preventing pellet discharge from crushing and pulverization according to claim 7, characterized in that: In the height direction, the inner ring side of the guide ring plate (9) is opposite to the edge of the receiving plate (8) and is located on the upper part of the receiving plate (8).
9. The device for preventing pellet discharge from crushing and pulverization according to any one of claims 1 to 8, characterized in that: It also includes a plurality of columns (5) extending in the height direction, wherein the top and bottom ends of the columns (5) are directly or indirectly fixed to the bin body (10); the plurality of columns (5) are arranged around the discharge chute (4) and are fixedly connected to the discharge chute (4).
10. The device for preventing pellet discharge from crushing and pulverization according to claim 9, characterized in that: In the circumferential direction of the discharge trough (4), the upright column (5) and the material distribution opening (11) are staggered.