A pre-treatment sizing device for the mining industry

Abstract

The application discloses a kind of mining pretreatment grading screening device, belong to broken ore processing technical field.It includes side plate frame, side plate frame is connected with filter screen by transverse drive component, and the filter screen is equipped with limiting strip, and limiting strip divides filter screen into first screening zone and second screening zone;Filter screen horizontal movement is screened to different granularity materials;The upper side of filter screen is equipped with uniform material component for the uniform distribution of ore block material on filter screen, and the application is driven by shaking component to realize lateral shaking classification of ore block material by horizontal movement of filter screen and cooperate limiting strip, and three-stage separation of large block, medium block and fine material can be realized on single-layer screen by using inertia difference of different granularity materials.Compared with traditional multilayer vertical screening structure, equipment height, complexity and manufacturing and maintenance cost can be significantly reduced, energy saving and efficiency are increased, and the problem of easy blocking of lower screen is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of crushed ore processing technology, and in particular to a mining pretreatment grading and screening device. Background Technology

[0002] In the comprehensive development and utilization of coal-associated mineral resources (such as coal and key strategic minerals like lithium), efficient and precise pretreatment and classification are the core foundation for achieving green and low-carbon resource recovery. These associated mineral bodies have complex structures and diverse mineral distribution characteristics. The crushed materials often exhibit wide particle size distributions and irregular shapes, placing higher demands on the adaptability, accuracy, and stability of classification equipment compared to single minerals. The effectiveness of pretreatment directly determines the energy consumption, media consumption, and final concentrate grade of subsequent physical or chemical separation processes, and is a prerequisite for the efficient separation and clean utilization of associated resources.

[0003] Currently, this field generally uses traditional multi-layer vibrating screens for grading. These devices employ a vertically stacked multi-layer screen structure, relying on vibration to disperse materials and allow them to pass through the screen geometrically. However, this technology faces several bottlenecks when processing coal-bearing associated minerals, which are incompatible with green and efficient development concepts: First, the complex structure and large, heavy machine body not only lead to high initial investment and maintenance costs, but its significant energy consumption also contradicts the current trend of low-carbon and energy-saving industrial development. Second, the multi-layer screens, especially the middle and lower layers, are prone to clogging when processing sticky, wet, fine-grained materials, causing a sharp decline in screening efficiency. Frequent shutdowns for cleaning not only significantly increase labor and time costs but also disrupt production processes, increase system energy consumption, and severely restrict continuous production.

[0004] More importantly, the traditional vibrating screen grading process relies entirely on the particles' own ability to pass through the screen and the passive effect of vibration, resulting in a relatively low sorting efficiency. For the large quantities of near-screen-sized particles and irregularly shaped lumps found in coal-bearing associated minerals, their trajectories are highly random, easily leading to particle size mismatch—that is, some qualified large lumps mistakenly enter the fine-grained product, or fine-grained materials fail to pass through the screen in time and mix with coarse-grained products. This mismatch not only directly reduces the recovery rate of the target mineral, causing resource waste, but also seriously pollutes the sorting environment of associated minerals, increases the consumption of reagents and equipment load in subsequent sorting operations, and greatly hinders the improvement of the overall recovery efficiency of coal-bearing associated mineral resources. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of screen clogging, large material burial, low grading efficiency, and insufficient screening of fine material that occur in traditional multi-layer vibrating screens during grading and screening. Therefore, a mining pretreatment grading and screening device is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A mining pretreatment grading and screening device includes a side plate frame. The side plate frame is connected to a filter screen via a transverse drive assembly. The filter screen is provided with a limiting strip, which divides the filter screen into a first screening section and a second screening section. The top of the limiting strip near the first screening section has an inclined surface, and the side of the limiting strip near the second screening section is a vertical surface. The filter screen moves horizontally to screen materials of different particle sizes. Large pieces of material quickly approach the limiting bar due to the inertia of the horizontal movement of the filter screen. Guided by the inclined surface inside the limiting bar, the large pieces of material can quickly roll over the limiting bar and be thrown to the outermost second screening zone. The inertia of medium-sized blocks is insufficient to cause them to roll over the limiting bar in the first screening section in the middle of the filter screen; Fine materials pass through the sieve openings of the filter screen; Above the filter screen is a material leveling component for evenly distributing the mineral material on the filter screen. The material leveling component includes a support frame and a material leveling plate connected to the distance adjustment component. A synchronous belt is installed inside the material leveling plate for transmission. A swing component is installed at the bottom of the synchronous belt. The swing component includes a swing plate with an adjustable angle. When the two material leveling plates are close together, the swing plate sorts and transfers the large mineral material stuck on one side of the material leveling plate. The outer side of the synchronous belt can contact the ore block material; it is used to transfer the ore block material that is piled up at a high position to a low position. The distance adjustment component drives the material leveling component to move back and forth within a certain range on the filter screen, which is used to process the material accumulated on the filter screen within a certain range. The lateral drive assembly includes a first electric push rod fixedly connected to the side plate frame. The fixed end of the first electric push rod is fixedly connected to the side plate frame, and the telescopic end of the first electric push rod is fixedly connected to the side plate on one side of the filter screen. The filter screen is moved horizontally by the first electric push rod. The filter screen is graded and screened by inertia and friction. The thickness of the limiting strip is the dividing line between the size of the ore blocks in the first screening zone and the second screening zone; The support plate is fixedly connected to the bottom of the synchronous belt; the second electric push rod is used to drive the swing plate to swing, separate the accumulated ore blocks, and eliminate the coal and lithium ore blocks piled up on one side of the uniform plate. The swing assembly also includes a support plate, which is movably hinged to the swing plate. A second electric push rod is mounted on the support plate, and a slide rail is provided on the swing plate. The telescopic end of the second electric push rod is movably hinged to a slide block that corresponds to the slide rail. The angle between the support plate and the swing plate is adjusted by the second electric push rod to clean impurities on the timing belt and the swing plate.

[0007] In some embodiments, a first pressure sensor is provided on the synchronous belt to detect the location of ore accumulation on one side of the synchronous belt, and a second pressure sensor is provided on the swing plate to detect the location of impurities attached to the synchronous belt and the swing plate.

[0008] In some embodiments, the top of the side plate frame is provided with a material hopper, the outlet of which corresponds to the center of the filter screen; the outer side of the side plate frame is provided with a vibration component and an elastic connecting seat for driving the filter screen to vibrate continuously to feed material.

[0009] In some embodiments, the discharge end of the filter screen is provided with a first collection channel and a second collection channel configured with a flexible ring, for the first collection channel and the second collection channel to move with the filter screen; a collection plate is provided below the filter screen for centralized collection of mineral blocks of different sizes.

[0010] Compared with the prior art, the present invention provides a mining pretreatment grading and screening device, which has the following beneficial effects.

[0011] 1. This invention utilizes a shaking component to drive the horizontal movement of a filter screen, which, in conjunction with limiting bars, achieves lateral shaking and grading of lumpy materials such as coal and lithium ore. By leveraging the inertial differences of materials of different particle sizes, three-stage separation of large, medium, and fine materials can be achieved on a single-layer screen. Compared to traditional multi-layer vertical screening structures, this invention significantly reduces equipment height, complexity, and manufacturing and maintenance costs, while also saving energy and increasing efficiency. Furthermore, it greatly reduces the problem of lower-layer screen clogging.

[0012] 2. The material leveling component in the device of the present invention senses the material pile condition in real time through a pressure sensor, and disperses or transfers the coal, lithium ore and other lumps that are piled up or stuck on one side of the material leveling component through active intervention, thereby effectively reducing the mixing between different particle sizes and improving the recovery rate of the target material and the overall screening efficiency.

[0013] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0015] Figure 2 This is a top view of the structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the material leveling component of the present invention.

[0017] Figure 4This is a schematic diagram of the structure of the collection channel of the present invention.

[0018] Figure 5 This is a schematic diagram of the synchronous belt drive structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the distance adjustment component of the present invention.

[0020] Figure 7 This is a schematic diagram of the internal structure of the uniform material plate of the present invention.

[0021] Figure 8 This is a schematic diagram of the structure of the swing component of the present invention.

[0022] Figure 9 This is a top view of the structure of the two swing components of the present invention.

[0023] Figure 10 This is a schematic diagram of the structure after the angle of the swing plate of the present invention is adjusted.

[0024] In the picture: 1. Side plate frame; 2. Filter screen; 201. Side plate; 3. Gathering hopper; 4. Vibration assembly; 5. Elastic connecting seat; 6. Base plate; 601. Side fixing plate; 7. Horizontal drive assembly; 701. Restriction strip; 7011. Inclined surface; 702. First screening section; 7021. First collection channel; 703. Second screening section; 7031. Second collection channel; 704. Collection plate; 7041. Collection hood; 705. First electric push rod; 8. Material leveling assembly; 801. Support frame; 8011. Horizontal... Plate; 8012, Vertical plate; 802, Material leveling plate; 8021, Driving gear; 8022, Driven gear; 8023, Synchronous belt; 8024, Drive motor; 803, Lifter; 9, Distance adjustment assembly; 901, Moving motor; 902, Threaded shaft; 903, Limiting groove; 904, Internal threaded slider; 10, Swing assembly; 1001, Support plate; 1002, Second electric push rod; 1003, Swing plate; 1004, Hinge; 1005, Slide rail; 1006, Slide seat. Detailed Implementation

[0025] 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.

[0026] Reference Figure 1-10A mining pretreatment grading and screening device includes a side plate frame 1, with a filter screen 2 installed on the inner side of the side plate frame 1. A material hopper 3 is installed at the top of one end of the side plate frame 1. Large and small pieces of coal, lithium ore, etc., that need to be graded and screened fall into the center of the filter screen 2 through the material hopper 3. A deceleration mechanism can be installed inside the material hopper 3 to reduce the falling speed of the material and reduce damage to the filter screen 2. A vibration component 4 is installed on the outer side of the side plate frame 1, and elastic connecting seats 5 are installed at the four corners of the side plate frame 1. The vibration component 4 includes a vibration motor. The elastic connecting seats 5 are used to cooperate with the vibration component 4 to make the side plate frame 1 and the filter screen 2 vibrate continuously for the downward movement of the material.

[0027] The side panel frame 1 is equipped with a transverse drive assembly 7 for the transverse movement of the filter screen 2. As one type of transverse drive assembly 7, the transverse drive assembly 7 includes a first electric push rod 705 fixedly connected to the side panel frame 1. The fixed end of the first electric push rod 705 is fixedly connected to the side panel frame 1, and the telescopic end of the first electric push rod 705 is fixedly connected to a side plate 201 on one side of the filter screen 2. The filter screen 2 is provided with a limiting strip 701, which divides the filter screen 2 into a first screening section 702 located in the middle and a second screening section 703 located on the outer side. The second screening section 703 is composed of the limiting strip 701, the side plate 201, and the filter screen 2. The first screening section 702 is composed of two limiting strips 701 and the filter screen 2.

[0028] The thickness of the limiting strip 701 serves as the dividing line between the specifications of coal, lithium ore, and other block materials in the first screening section 702 and the second screening section 703, thus determining the specifications of the coal and lithium ore block materials in the first screening section 702 and the second screening section 703. The discharge end of the filter screen 2 is provided with a first collection channel 7021 and a second collection channel 7031. The first collection channel 7021 is connected to the first screening section 702, and the second collection channel 7031 is connected to the second screening section 703. The first collection channel 7021 and the second collection channel 7031 are partially designed as flexible rings for the first collection channel 7021 and the second collection channel 7031 to move horizontally with the filter screen 2. A collection plate 704 is provided below the filter screen 2, and a material collection cover 7041 is provided at the bottom end of the collection plate 704.

[0029] As a type of elastic connecting seat 5, the elastic connecting seat 5 includes an upper elastic part and a lower fixed part. The bottom of the lower fixed part is connected to a base plate 6, and the upper elastic part is fixedly connected to the side plate frame 1.

[0030] In this invention, the coal, lithium ore, and other lumps to be screened are first introduced into the middle of the filter screen 2 through the hopper 3. Under the vibration action of the vibration component 4 and the elastic connecting seat 5 on the side plate frame 1 and the filter screen 2, the side plate frame 1 and the filter screen 2 are continuously vibrated. The side plate frame 1 and the filter screen 2 are both inclined. The hopper 3 is located at the high position of the side plate frame 1. Under the vibration action of the side plate frame 1 and the filter screen 2, the coal and lithium ore lumps falling from the hopper 3 onto the filter screen 2 continue to move downward. Under the restriction action of the limiting strip 701, the coal and lithium ore lumps on the filter screen 2 gather in the first screening section 702 and continue to move downward under the vibration action. Coal and lithium ore lumps smaller than the aperture of the filter screen 2 fall continuously into the collection plate 704 after passing through the filter screen 2. The collection plate 704 is inclined, just like the filter screen 2. Through the vibration of the filter screen 2, the coal and lithium ore lumps on the collection plate 704 move to a lower position and are finally collected and discharged through the collection hood 7041.

[0031] refer to Figures 1 to 4In one specific implementation, as lumps of coal, lithium ore, etc., move downwards along the inclined filter screen 2, the first electric push rod 705 in the transverse drive assembly 7 drives the filter screen 2 to move horizontally back and forth. The first electric push rod 705 is perpendicular to the filter screen 2, and a limiting support component movably connected to the filter screen 2 is provided opposite the first electric push rod 705. The limiting support component includes a limiting cylinder fixed on the side plate frame 1 and a telescopic column located on the side of the filter screen 2 away from the first electric push rod 705. The limiting cylinder provides limiting and support for the filter screen 2 through the telescopic column. During the horizontal back and forth movement of the filter screen 2 driven by the first electric push rod 705, coal and lithium ore particles of different sizes rely on high-frequency, small-amplitude transverse shaking. Under the action of inertia and friction, coal and lithium ore particles of different sizes produce different motion responses on the filter screen 2, thereby achieving the classification and screening of coal and lithium ore particles of different sizes. Unlike traditional vibrating screens where multiple layers of screens are vertically stacked and the mesh size gradually decreases from top to bottom, relying on gravity and vibration for layer-by-layer screening, this single-layer filter screen 2 is sufficient to classify and screen coal and lithium ore of different particle sizes. Specifically, the filter screen 2 is divided into large, medium, and fine particles according to their size. During the back-and-forth movement of the filter screen 2 driven by the first electric push rod 705, large particles have greater inertia, and their tops extend beyond the upper surface of the limiting bar 701. The limiting bar 701 has a sloping surface 7011 on its top side near the first screening section 702. Due to the inertia of the filter screen 2 moving horizontally, the large particles quickly approach the limiting bar 701. When the large particles come into contact with the limiting bar 701, they are guided by the sloping surface 7011 on the inner side of the limiting bar 701 and quickly roll over it, being thrown towards the outermost second screening section 703. The side of the screen closest to the second screening section 703 is vertical. When large pieces of material in the second screening section 703 come into contact with the limiting strip 701, the limiting strip 701 provides a lateral reaction force to the large pieces, preventing them from returning to the first screening section 702. Medium-sized pieces have moderate inertia, and their tops are lower than the upper surface of the limiting strip 701. During the back-and-forth movement of the filter screen 2, the inertia of medium-sized pieces is insufficient to make them roll over the limiting strip 701. As the filter screen 2 continues to vibrate, the medium-sized pieces move downwards in the first screening section 702 in the middle of the filter screen 2. Fine materials have low inertia and are easier to pass through the screen holes of the filter screen 2. Through the vibration of the vibrating component 4, the fine materials sink to the bottom of the coal and lithium ore pieces and fall through the screen holes of the filter screen 2 to the collection plate 704 for collection.

[0032] Furthermore, it is understandable that when lumps of coal, lithium ore, etc., fall through the hopper 3 onto the filter screen 2, they will form localized accumulations on the screen. The vibration of the filter screen 2 makes it difficult to evenly spread the lumps, resulting in fine materials not having enough time to pass through the screen. The burying of large lumps by medium and fine materials also hinders the rapid transfer of large lumps to the second screening zone 703. To solve these problems, refer to... Figures 1 to 5 Above the filter screen 2, there is a material distribution component 8 for uniformly distributing coal and lithium ore blocks on the filter screen 2; the material distribution component 8 includes a support frame 801 and a material distribution plate 802, and there are two material distribution components 8.

[0033] The base plate 6 has a side fixing plate 601 on one side, and the support frame 801 is connected to the side fixing plate 601. The side fixing plate 601 and the base plate 6 are detached from each other, and the vibration of the vibration component 4 is not transmitted to the side fixing plate 601 and the material leveling component 8. The material leveling plate 802 has a movable groove inside, and the two ends of the movable groove are respectively provided with a driving gear 8021 and a driven gear 8022. The driving gear 8021 is driven by a drive motor 8024, which is located on the top of the material leveling plate 802. The outer sides of the driving gear 8021 and the driven gear 8022 are connected to a synchronous belt 8023, and the top of the synchronous belt 8023 is movably connected to the movable groove. The top of the movable trough is provided with a limiting groove, and the top of the synchronous belt 8023 is provided with a sliding block adapted to the limiting groove to provide limiting support for the synchronous belt 8023. An internal rack is provided on the inner side of the synchronous belt 8023, and the driving gear 8021 and the driven gear 8022 mesh with the synchronous belt 8023. A lifting device 803 for adjusting the horizontal height of the uniform material plate 802 is provided between the support frame 801 and the uniform material plate 802. The two lifting devices 803 are of the same model. Of the two uniform material plates 802, the one closer to the hopper 3 is higher. The lower surface of the uniform material plate 802 closer to the hopper 3 is higher than the large pieces of material, and the thickness of the uniform material plate 802 covers the upper part of the piled coal and lithium ore blocks, preventing material from passing over the top layer of the uniform material plate 802.

[0034] In use, a set of material leveling components 8 is positioned close to the material hopper 3. When the coal, lithium ore, and other lumps falling onto the filter screen 2 move between the material leveling plates 802, one side of the material leveling plates 802 blocks and limits the top of the piled coal and lithium ore lumps, restricting the height of the piled coal and lithium ore lumps to below the upper surface of the limiting strip 701. At the same time, the drive motor 8024 drives the drive gear 8021 to rotate at a constant speed. Through the transmission cooperation between the synchronous belt 8023 and the driven gear 8022, the synchronous belt 8023 circulates in the movable groove along the material movement direction of the filter screen 2, that is, from high to low. A first pressure sensor is installed on the synchronous belt 8023. This sensor has a preset pressure threshold P1, used to detect the accumulation position of coal and lithium ore lumps. For example, if coal and lithium ore lumps accumulate on the side of the filter screen 2 closest to the vibrating component 4, the synchronous belt 8023, driven by the drive motor 8024, moves away from the vibrating component 4 on the side closest to the coal and lithium ore lumps, thus moving the material. Through this arrangement, the outer surface of the synchronous belt 8023 directly contacts the blocked upper coal and lithium ore lumps, generating a continuous auxiliary conveying force on large and medium-sized lumps. This pushes the coal and lithium ore lumps falling onto the filter screen 2 to quickly and evenly disperse, ensuring that the subsequent lateral screening action of the lateral drive component 7 can act on each lump. This avoids large lumps being buried by medium and fine lumps due to an excessively thick material layer, and prevents the material pile from compacting the lower layer of fine material due to its own weight, causing the fine material to be squeezed and agglomerated and unable to pass smoothly through the screen holes. Ultimately, fine materials can pass through the screen holes more quickly and fall into the collection plate 704, while large materials can be fully exposed on the screen surface of the filter screen 2. During the subsequent transverse screening by the transverse drive component 7, large materials can quickly contact the limiting bar 701 and roll into the second screening section 703, while medium-sized materials remain stably in the first screening section 702 and move downwards. This solves the problem of low screening efficiency and incomplete grading effect caused by the accumulation of coal and lithium ore lumps, thereby further ensuring the stability and accuracy of the grading screening of this single-layer filter screen 2.

[0035] Furthermore, as a preferred embodiment, it is understood that, due to the different shapes of coal and lithium ore lumps, some uniformly shaped large lumps can quickly roll into the second screening section 703 during the lateral movement of the filter screen 2. However, some large lumps with weak rolling ability have difficulty rolling into the second screening section 703 within a limited time, resulting in these large lumps that meet the requirements of the second screening section 703 remaining in the first screening section 702. To solve the above problem, refer to... Figures 1 to 9 ; A swing assembly 10 is provided at the bottom of the synchronous belt 8023. In the initial state, the swing assembly 10 is located in the middle of the uniform plate 802. The swing assembly 10 includes a support plate 1001 fixedly connected to the synchronous belt 8023, a second electric push rod 1002, and a swing plate 1003. One end of the support plate 1001 is movably hinged to one end of the swing plate 1003. The second electric push rod 1002 is provided on one side of the support plate 1001. A slide rail 1005 is provided at the corresponding position of the swing plate 1003 and the second electric push rod 1002. The telescopic end of the second electric push rod 1002 passes through the support plate 1001 and is movably hinged to a slide block 1006. The slide block 1006 is slidably connected inside the slide rail 1005. In use, the first pressure sensor detects and judges the pressure. When the pressure threshold P1 on the first pressure sensor on the synchronous belt 8023 reaches the first pressure sensor, the drive motor 8024 drives the synchronous belt. As 8023 moves downward, the swing assembly 10 approaches the area where pressure increases. Initially, the swing plate 1003 is located inside the synchronous belt 8023. When the swing assembly 10 corresponds to the accumulated area, the second electric push rod 1002 extends and retracts rapidly, and the swing plate 1003 swings rapidly around the pivot point of the hinge 1004. Since the bottom of the swing plate 1003 is closer to the filter screen 2 than the synchronous belt 8023, it can act synchronously on different layers of accumulated coal and lithium ore during the swing process, thereby dispersing and separating the accumulated coal and lithium ore through the swing, eliminating the coal and lithium ore piles gathered on one side of the uniform material plate 802, and preventing the coal and lithium ore from accumulating too high under the limiting action on one side of the uniform material plate 802. Then, during the lateral movement of the filter screen 2, the non-large coal and lithium ore enters the second screening section 703. Furthermore, the above method can serve as an inspection method, avoiding misjudgment as large pieces of material accumulating on one side of the uniform material plate 802. The side fixing plate 601 is equipped with a distance adjustment component 9 for driving the uniform material assembly 8 to move horizontally. The distance adjustment component 9 can drive the uniform material assembly 8 to move horizontally, so that the uniform material assembly 8 can move back and forth within a certain range on the filter screen 2, thereby increasing the processing range of the uniform material assembly 8 on the material accumulated on the filter screen 2.When dealing with large pieces of coal and lithium ore that have weak rolling ability and are stuck in the first screening section 702, a pressure threshold P2 is preset in the first pressure sensor, where P2 > P1. When the first pressure sensor reaches the pressure threshold P2, it indicates that large pieces of material are stuck on one side of the equalizing plate 802. To address this, two equalizing components 8 are used. These two components 8 are synchronously driven by a distance adjustment component 9 to move closer or further apart. First, the synchronous belt 8023 is reset by the drive motor 8024. Then, the drive motor 8024 controls the swing plates 1003 on the two synchronous belts 8023 to align. Next, driven by the distance adjustment component 9, the two equalizing components 8 are moved closer together by two support frames 801, and the two swing plates 1003 clamp the stuck large pieces of material. The swing plate 1003 is equipped with a second pressure sensor, which has a preset pressure threshold P3. When the pressure threshold of the second pressure sensor reaches P3, the distance adjustment component 9 adjusts the distance between the two components. The distance adjustment component 9 stops shortening the distance between the two material leveling components 8, thus completing the tight clamping of large pieces of material and preventing them from falling again. Then, the two drive motors 8024 drive the synchronous belt 8023 to move at the same speed and in the same direction, transferring the large pieces of material stuck in the first screening section 702 to the second screening section 703. If the swing plate 1003 is lower than the height of the limit bar 701, the two sets of lifting devices 803 synchronously drive the swing plate 1003 to move upward to a position higher than the limit bar 701. When the large pieces of material are above the second screening section 703, the distance adjustment component 9 starts again to move the two swing plates 1003 away from each other, releasing the large pieces of material between the two swing plates 1003. This achieves the sorting of the large pieces of material stuck in the first screening section 702 to the second screening section 703, preventing the large pieces of material from being stuck on one side of the limit bar 701, causing medium or fine pieces of material to accumulate there and move to the mismatched screening section during the lateral movement of the filter screen 2, resulting in mismatch. By accurately intervening in the processing of large materials as described above, the recovery rate of the target material and the overall screening efficiency can be improved.

[0036] Understandably, when large pieces of material are detected lingering on one side of the equalization plate 802, the horizontal drive assembly 7 can be temporarily stopped from horizontally shaking the filter screen 2 to prevent excessive displacement of large pieces of material from affecting the stable clamping of the two swing plates 1003. It also prevents large pieces of material from accumulating when they are close to the limiting bar 701, causing the height of non-large pieces of material to increase, and entering the second screening zone 703 during the horizontal movement of the filter screen 2. At the same time, it can also prevent non-large lithium ore lumps from quickly agglomerating at the location of large pieces of material and causing jamming. After the lingering large pieces of material are sorted to the second screening zone 703, the horizontal drive assembly 7 is restarted.

[0037] As one type of the aforementioned distance adjustment component 9, the distance adjustment component 9 includes a movable motor 901 fixedly connected to the side fixing plate 601. The rotating end of the movable motor 901 is provided with a threaded shaft 902, and an internally threaded slider 904 is threadedly driven on the threaded shaft 902. The external threads at both ends of the threaded shaft 902 are in opposite directions, and the two sets of external threads are respectively adapted to the two internally threaded sliders 904. A limiting groove 903 is provided on the top of the side fixing plate 601, and the bottom of the internally threaded slider 904 is limited by the side fixing plate 601. The slide groove 903 limits the sliding connection, and the bottom end of the support frame 801 is fixedly connected to the internal thread slider 904. The moving motor 901 is threadedly engaged with the internal thread slider 904 through the threaded shaft 902. The limiting action of the limiting slide groove 903 on the bottom of the internal thread slider 904 causes the internal thread slider 904 to drive the support frame 801 and the uniform plate 802 to move horizontally. A sliding part is provided at the other end of the support frame 801 away from the moving motor 901 to form a support and sliding engagement at the other end of the support frame 801.

[0038] Further, refer to Figure 9 The swing plate 1003 can form a certain angle between the swing plate 1003 and the support plate 1001 under the rotational engagement of the support plate 1001 and the end hinge 1004 of the swing plate 1003, and the sliding engagement of the slide block 1006 in the slide rail 1005. This angle is referred to as the angle swing plate 1003. At this time, the end of the angle swing plate 1003 away from the hinge 1004 will extend out of the synchronous belt 8023. Driven by the distance adjustment component 9, the two equalizing plates 802 are brought closer together, causing the angled oscillating plate 1003 to come into contact with another oscillating plate 1003 parallel to one side of the synchronous belt 8023. Then, the drive motor 8024 on the angled oscillating plate 1003 remains in a power-off locked state, while the other drive motor 8024 drives the synchronous belt 8023 to rotate, causing the synchronous belt 8023 to move horizontally in contact with the angled oscillating plate 1003. During this process, as the synchronous belt 8023 passes the angled oscillating plate 1003, impurities on it are scraped off by the end of the angled oscillating plate 1003. The second pressure sensor on the 3 can preset a pressure threshold P4. When the synchronous belt 8023 passes the angle swing plate 1003 and the second pressure sensor detects that the pressure threshold P4 has been reached, the drive motor 8024 on the angle swing plate 1003 drives the slide rail 1005 to move back and forth, scraping the area that causes resistance multiple times to avoid the impurities on the synchronous belt 8023 not being cleaned properly. The lifting device 803 can adjust the correspondence between the angle swing plate 1003 and the synchronous belt 8023 or the swing plate 1003. The two swing plates 1003 scrape and clean the impurities on the outside of the two synchronous belts 8023 respectively.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A mineral pretreatment grading and screening device, comprising a side plate frame (1), characterized in that, The side panel frame (1) is connected to a filter screen (2) via a transverse drive assembly (7). The filter screen (2) is provided with a limiting strip (701), which divides the filter screen (2) into a first screening section (702) and a second screening section (703). The top of the limiting strip (701) near the first screening section (702) has an inclined surface (7011), and the side of the limiting strip (701) near the second screening section (703) is a vertical surface. The filter screen (2) moves horizontally to screen materials of different particle sizes. Due to the inertia of the filter screen (2) moving horizontally, the large pieces of material quickly approach the limiting bar (701). Guided by the inclined surface (7011) inside the limiting bar (701), the large pieces of material can quickly roll over the limiting bar (701) and be thrown to the outermost second screening section (703). The inertia of the medium-sized block is insufficient to make it roll over the limiting bar (701) in the first screening section (702) in the middle of the filter screen (2). Fine material passes through the sieve holes of the filter screen (2); Above the filter screen (2) is a material distribution assembly (8) for uniformly distributing the ore blocks on the filter screen (2). The material distribution assembly (8) includes a support frame (801) connected to the distance adjustment assembly (9) and a material distribution plate (802). The material distribution plate (802) is internally equipped with a synchronous belt (8023). The bottom of the synchronous belt (8023) is equipped with a swing assembly (10). The swing assembly (10) includes an angle-adjustable swing plate (1003). When the two material distribution plates (802) are close together, the swing plate (1003) sorts and transfers the large ore blocks that remain on one side of the material distribution plate (802). The outer side of the synchronous belt (8023) can contact the ore block material; it is used to transfer the ore block material piled up at a high position to a low position. The distance adjustment component (9) drives the material leveling component (8) to move back and forth within a certain range on the filter screen (2) for processing the accumulated material within a certain range on the filter screen (2); The transverse drive assembly (7) includes a first electric push rod (705) fixedly connected to the side plate frame (1). The fixed end of the first electric push rod (705) is fixedly connected to the side plate frame (1), and the telescopic end of the first electric push rod (705) is fixedly connected to the side plate (201) on one side of the filter screen (2). The filter screen (2) is driven to move horizontally by the first electric push rod (705). The filter screen (2) is graded and screened by inertia and friction. The thickness of the limiting strip (701) is the dividing line between the specifications of the ore blocks in the first screening zone (702) and the second screening zone (703); The support plate (1001) is fixedly connected to the bottom of the synchronous belt (8023); the second electric push rod (1002) is used to drive the swing plate (1003) to swing, separate the accumulated ore blocks, and eliminate the coal and lithium ore blocks piled up on one side of the uniform plate (802); The swing assembly (10) also includes a support plate, the support plate (1001) and the swing plate (1003) are movably hinged, the second electric push rod (1002) is provided on the support plate (1001), the swing plate (1003) is provided with a slide rail (1005), the telescopic end of the second electric push rod (1002) is movably hinged with a slide block corresponding to the slide rail (1005), the angle between the support plate (1001) and the swing plate (1003) is adjusted by the second electric push rod (1002) to clean impurities on the synchronous belt (8023) and the swing plate (1003).

2. The mining pretreatment grading and screening device according to claim 1, characterized in that, The synchronous belt (8023) is equipped with a first pressure sensor for detecting the position of the ore block accumulation on one side of the synchronous belt (8023), and the swing plate (1003) is equipped with a second pressure sensor for detecting the position of the impurities attached to the synchronous belt (8023) and the swing plate (1003).

3. A mining pretreatment grading and screening device according to claim 2, characterized in that, The top of the side plate frame (1) is provided with a material hopper (3), and the outlet of the material hopper (3) corresponds to the center of the filter screen (2); the outer side of the side plate frame (1) is provided with a vibration component (4) and an elastic connecting seat (5) to drive the filter screen (2) to vibrate continuously to feed material.

4. A mining pretreatment grading and screening device according to claim 3, characterized in that, The discharge end of the filter screen (2) is provided with a first collection channel (7021) and a second collection channel (7031) configured with a flexible ring, which are used for the first collection channel (7021) and the second collection channel (7031) to move with the filter screen (2); a collection plate (704) is provided below the filter screen (2) for the centralized collection of mineral blocks of different sizes.

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