Mineral aggregate screening and crushing device

Abstract

The invention relates to a mineral aggregate screening and crushing device. The device comprises a conveying belt machine, a discharging mechanism, a screening mechanism and an excess material recycling mechanism, a leveling assembly is installed on the conveying belt machine, the conveying belt machine is divided into a feeding section and a discharging section through the leveling assembly, the discharging mechanism capable of adjusting the discharging direction is installed at the discharging section, and a gap is reserved between the discharging mechanism and the conveying belt machine; screening mechanisms corresponding to the discharging mechanisms are arranged on the two sides of the belt conveyor. The bottom of the discharging section is further provided with an excess material recycling mechanism used for recycling mineral aggregate leaking through the gap. According to the scheme, mineral aggregate can be automatically screened and crushed, through non-contact discharging, friction between the discharging plate and the conveying belt is reduced, and the service life of the discharging plate and the service life of the conveying belt are prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of mineral material conveying equipment, and in particular to a mineral material screening and crushing device. Background Art

[0002] In the smelting process, the materials are generally fed through a trough-type conveyor belt. By setting the support rollers in an arc shape, the conveyor belt is made into a groove shape with high sides and low in the middle, which facilitates the transportation of ore.

[0003] When feeding the bottom-blown furnace, since some lump ore is mixed in the ore particles, the large lump ore needs to be sorted out before entering the furnace to ensure the smelting quality; the sorted lump ore is generally crushed by manual crusher and then enters the silo to supply the bottom-blown furnace.

[0004] The following problems exist in this process: First, since the feeding process operates 24 hours a day, relying on manual sorting and crushing is not only labor-intensive, but also prone to fragments splashing during crushing, which poses a major safety hazard. Second, in the traditional unloading process, the unloading plate needs to be in contact with the conveyor belt at all times, resulting in high friction, and the unloading plate and conveyor belt need to be frequently maintained and replaced. If the replacement is not timely, a gap will form between the unloading plate and the conveyor belt due to wear, and the ore will pass through the gap, resulting in leakage. Summary of the invention

[0005] In order to solve or partially solve the problems existing in the related technology, the present application provides a mineral screening and crushing device, which can automatically screen and crush the mineral, and unload the material through non-contact, thereby reducing the friction between the unloading plate and the conveyor belt, and increasing the service life of the unloading plate and the conveyor belt.

[0006] The present application provides a mineral material screening and crushing device, comprising a conveyor belt conveyor, a discharge mechanism, a screening mechanism, and a residual material recovery mechanism. A leveling component is installed on the conveyor belt conveyor, and the conveyor belt conveyor is divided into a feeding section and a discharge section by the leveling component. A discharge mechanism with adjustable discharge direction is installed at the discharge section, and a gap is left between the discharge mechanism and the conveyor belt conveyor; screening mechanisms corresponding to the discharge mechanism are arranged on both sides of the conveyor belt conveyor; and a residual material recovery mechanism for recovering mineral materials leaking through the gap is also installed at the bottom of the discharge section.

[0007] Optionally, in some embodiments, the leveling assembly includes an adjustment box, an adjustment block, adjustment teeth, a pressure roller, and a clamping tooth. The adjustment box is fixed to the conveyor belt machine through a first support plate, and an adjustment block is slidably connected inside the adjustment box, and a pressure roller corresponding to the conveyor belt of the conveyor belt machine is rotatably installed on the adjustment block; adjustment teeth are evenly arranged on the left and right sides of the adjustment block, and a clamping tooth corresponding to the adjustment tooth is slidably installed on the adjustment box, and the height position of the pressure roller can be adjusted by clamping the clamping tooth on the adjustment teeth at different positions.

[0008] Optionally, in some embodiments, a first spring is disposed at the bottom of the regulating box, an end of the first spring is fixedly connected to the regulating block, and the first spring is always in a compressed state.

[0009] Optionally, in some embodiments, a wing plate is provided on the side of the adjustment box, a guide rod is fixed on the wing plate, a slider is slidably connected to the guide rod, a latch tooth corresponding to the adjustment tooth is provided at the end of the slider, and a second spring is provided between the slider and the wing plate, and the second spring is always in a compressed state.

[0010] Optionally, in some embodiments, a first bracket is provided on the conveyor belt machine, and a support roller corresponding to the unloading section is rotatably mounted on the first bracket.

[0011] Optionally, in some embodiments, the unloading mechanism includes a second bracket, a first telescopic rod, a reversing plate, and a unloading plate. The second bracket is fixedly mounted on the fixed plate, a reversing plate is hinged at the end of the second bracket, and the unloading plate is fixedly mounted on the reversing plate. A gap is left between the bottom surface of the unloading plate and the conveyor belt of the conveyor belt machine; one end of the first telescopic rod is hinged on the fixed plate, and the other end is hingedly connected to the reversing plate. The unloading direction of the reversing plate can be adjusted by extending or shortening the first telescopic rod.

[0012] Optionally, in some embodiments, the screening mechanism includes a screening box, a partition, a screen, and a clearing assembly. The screening box is arranged on the left and right sides of the unloading section, and the screening box is separated into a first discharge chamber and a second discharge chamber by a partition. A screen is installed obliquely at the first discharge chamber, and a clearing assembly for cleaning the screen is also installed in the screening box. The first discharge chamber is connected to the silo through a discharge pipe, and the second discharge chamber is connected to the crusher through a lump ore conduit.

[0013] Optionally, in some embodiments, the clearing assembly includes a second telescopic rod, a cleaning frame, and a cleaning rod. The second telescopic rod is fixedly installed in the screening box, and the end of the second telescopic rod is fixedly connected to the cleaning frame. Cleaning rods corresponding to the gaps in the screen are evenly arranged on the cleaning frame, and the cleaning rods are parallel to the screen.

[0014] Optionally, in some embodiments, the residual material recovery mechanism includes a recovery box, a cleaning brush, a return pipe, a sealing plate, a fixing assembly, and a vibration motor. The recovery box is fixedly arranged at the bottom of the unloading section, and the bottom of the recovery box is respectively connected to different silos through two return pipes. A sealing plate is also installed in the recovery box through a fixing assembly, and the return pipe can be blocked by the sealing plate to control the flow direction of the mineral material; a cleaning brush for cleaning the conveyor belt is installed in the recovery box, and a vibration motor is installed at the bottom of the recovery box.

[0015] Optionally, in some embodiments, the fixing assembly includes a hinge support, a fixing seat, and a pressure block. The hinge support and the fixing seat are both fixed on the recycling box, and the distance between the hinge support and the fixing seat is consistent with the width of the sealing plate. The hinge support is hinged with a pressure block, and the pressure block and the fixing seat are connected by a pin.

[0016] The technical solution provided by this application may have the following beneficial effects:

[0017] The present application uses non-contact unloading to reduce the friction on the conveyor belt and the unloading plate, thereby increasing their service life; the unloading direction of the unloading plate can be changed through the unloading mechanism, thereby achieving unloading to different silos; the residual material recovery mechanism can collect the missed mineral materials generated during unloading and directly introduce them into the silo, thereby avoiding mineral material spillage and improving resource utilization.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0020] Figure 1 It is a schematic diagram of the overall structure of this application;

[0021] Figure 2 It is a structural schematic diagram of the conveyor belt conveyor and the unloading mechanism of the present application;

[0022] Figure 3 It is a structural schematic diagram of the conveyor belt machine of the present application;

[0023] Figure 4 It is a schematic diagram of the structure of the regulating component of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of the regulating component of the present application;

[0025] Figure 6It is a structural schematic diagram of the unloading mechanism of this application;

[0026] Figure 7 It is a partial structural diagram of this application;

[0027] Figure 8 It is a structural schematic diagram of the screening mechanism of the present application;

[0028] Fig. 9 It is a partial structural schematic diagram of the screening mechanism of the present application;

[0029] Fig.10 It is a structural diagram of the waste material recycling mechanism of this application;

[0030] Fig.11 It is a partial structural diagram of the residual material recovery mechanism of this application;

[0031] Fig.12 It is a schematic diagram of the overall structure of this application.

[0032] Reference numerals:

[0033] 1- conveyor belt, 11- feeding section, 12- leveling assembly, 121- first support plate, 122- adjusting box, 123- adjusting block, 1231- limiting groove, 124- adjusting tooth, 125- first spring, 126- pressure roller, 127- wing plate, 1271- guide rod, 128- second spring, 129- slider, 1291- latching tooth, 13- unloading section, 14- first bracket, 15- supporting roller, 16- driving roller;

[0034] 2-unloading mechanism, 21-fixed plate, 22-second bracket, 23-support, 24-first telescopic rod, 25-second support, 26-connector, 27-third support, 28-reversing plate, 29-unloading plate;

[0035] 3-screening mechanism, 31-screening box, 32-partition, 33-screen, 34-side plate, 35-baffle, 36-blocking clearing assembly, 361-second support plate, 362-second telescopic rod, 363-cleaning frame, 364-cleaning rod, 37-first discharging cavity, 38-second discharging cavity;

[0036] 4-residue material recovery mechanism, 41-recovery box, 42-cleaning brush, 43-return material pipe, 44-sealing plate, 45-fixing assembly, 451-hinge support, 452-fixing seat, 453-pressing block, 46-vibration motor;

[0037] 5-floor, 6-gap, 7-down pipe, 71-bin, 8-ore conduit, 81-ore bin, 82-vibrating feeder, 83-crusher. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0039] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] See also Figure 1 , a mineral material screening and crushing device, comprising: a conveyor belt conveyor 1, a discharging mechanism 2, a screening mechanism 3, and a residual material recovery mechanism 4. The conveyor belt conveyor 1 is modified from a trough-type conveyor belt conveyor. For specific modification methods, see Figure 2, the end of the trough-type conveyor belt is extended, and the conveyor belt is adjusted from a trough type to a plane type through a flattening component 12, so that the conveyor belt 1 is divided into a trough-type feeding section 11 and a plane-type unloading section 13 with the flattening component 12 as the boundary, and a discharge mechanism 2 with adjustable unloading direction is installed at the unloading section 13. By adjusting the unloading direction, the ore can flow to different silos, thereby ensuring the stability of the feeding process. Further, the present application adopts non-contact unloading, and a gap 6 is left between the unloading mechanism 2 and the conveyor belt 1, thereby reducing the friction between the unloading mechanism 2 and the conveyor belt 1 and improving its service life. Screening mechanisms 3 corresponding to the unloading mechanism 2 are arranged on both sides of the conveyor belt 1. The block ore mixed in the ore can be separated by the screening mechanism 3, thereby ensuring the smelting quality; a residual material recovery mechanism 4 for recovering the ore leaking from the gap 6 is also installed at the bottom of the unloading section 13 to improve the utilization rate of resources.

[0043] In some embodiments, see Figure 3-5The leveling assembly 12 includes an adjustment box 122, an adjustment block 123, an adjustment tooth 124, a pressure roller 126, and a latching tooth 1291. The adjustment box 122 is a square box structure. Two adjustment boxes 122 are symmetrically fixed at both ends of the first support plate 121. The first support plate 121 is fixed to the bracket of the conveyor belt machine 1. The adjustment block 123 is slidably connected in the adjustment box 122. The pressure roller 126 corresponding to the conveyor belt of the conveyor belt machine 1 is rotatably installed on the adjustment block 123. The pressure roller 126 presses down the two sides of the conveyor belt, so that the conveyor belt changes from a groove type to a flat type, thereby facilitating unloading. Due to the wear problem of the pressure roller 126 after long-term use, it is impossible to flatten the two sides of the conveyor belt, affecting the flatness of the unloading section 13. Therefore, by designing the flattening component 12 to be adjustable, when the diameter of the pressure roller 126 becomes smaller due to wear, the flatness of the conveyor belt at the unloading section 13 can be ensured by adjusting the downward pressure of the pressure roller 126, thereby facilitating unloading; the implementation method is: adjusting teeth 124 are evenly arranged on the left and right sides of the adjustment block 123, and the corresponding adjusting teeth are slidably installed on the adjustment box 122. The height position of the pressure roller 126 can be adjusted by clamping the clamping teeth 1291 on the adjustment teeth 124 at different positions, thereby adjusting the downward pressure distance of the pressure roller 126 to ensure the flatness of the unloading section 13. Furthermore, in order to facilitate the adjustment of the downward pressing distance of the pressure roller 126, a wing plate 127 is provided on the side of the adjustment box 122, and a guide rod 1271 is fixed laterally on the upper edge of the wing plate 127, and a slider 129 is slidably connected to the guide rod 1271, and a latch tooth 1291 corresponding to the adjusting tooth 124 is provided at the end of the slider 129, and a second spring 128 is provided between the slider 129 and the wing plate 127. The second spring 128 is always in a compressed state. When making adjustments, the adjustment block 123 is directly pressed, and the latch tooth 1291 is squeezed by the adjusting tooth 124, driving the slider 129 to slide outward, squeezing the second spring 128 to shrink it. After the adjustment is completed, the slider 129 drives the latch tooth 1291 to press against the adjusting tooth 124 under the action of the second spring 128, thereby fixing the adjustment block 123. In order to avoid over-adjustment due to excessive force when pressing the adjustment block 123, a first spring 125 is provided at the bottom of the adjustment box 122, and the end of the first spring 125 is fixedly connected to the adjustment block 123, and the first spring 125 is always in a compressed state, thereby increasing the resistance when pressing down the adjustment block 123 and improving the stability of the adjustment process. In order to ensure the stability of the sliding process of the adjustment block 123, a limiting groove 1231 is opened on the adjustment block 123, and a limiting protrusion is provided on the adjustment box 122, and the adjustment block 123 is slidably connected to the limiting protrusion through the limiting groove 1231.

[0044] In order to further improve the flatness of the unloading section 13, a first bracket 14 is fixed on the bracket of the conveyor belt machine 1, and a support roller 15 is rotatably mounted on the first bracket 14. The support roller 15 supports the bottom surface of the conveyor belt at the unloading section 13 to prevent it from sagging due to the weight of the material, thereby keeping the conveyor belt flat and facilitating unloading.

[0045] In some embodiments, see Figure 2 , 5 The unloading mechanism 2 includes a second bracket 22, a first telescopic rod 24, a reversing plate 28, and a unloading plate 29. The second bracket 22 is fixedly mounted on the fixed plate 21. The fixed plate 21 is fixed at the floor 5 of the upper layer of the factory building. A connector 26 is welded and fixed at the end of the second bracket 22. A third support 27 is arranged at the middle position of the reversing plate 28. The connector 26 is hingedly connected to the third support 27. A first support 23 is also arranged on the fixed plate 21. A second support 25 is arranged at an eccentric position of the reversing plate 28. One end of the first telescopic rod 24 is hingedly connected to the first support 23, and the other end is hingedly connected to the second support 25. By controlling the elongation of the first telescopic rod 24, the reversing plate 28 can be rotated around the third support 27, thereby changing the unloading direction.

[0046] For further information, see Figure 7 A discharge plate 29 is fixedly mounted on the reversing plate 28. A gap 6 is left between the bottom surface of the discharge plate 29 and the conveyor belt of the conveyor belt machine 1. The width of the gap 6 is 5-10 mm. Since the diameter of the block ore to be screened out in the ore is above 30 mm, the ore passing through the gap 6 can be directly smelted. By setting the gap 6, the discharge plate 29 does not contact the conveyor belt, thereby reducing the friction between the discharge plate 29 and the conveyor belt and improving their service life. During unloading, the ore on the conveyor belt is guided by the discharge plate 29 to fall into the screening mechanism 3 for screening. Due to the existence of the gap 6, a small amount of ore will pass through the gap 6 and be collected by the residual material recovery mechanism 4, thereby avoiding the leakage of the ore.

[0047] In some embodiments, see Figure 8The screening mechanism 3 includes a screening box 31, a partition 32, a screen 33, and a clearing assembly 36. The two screening boxes 31 are respectively arranged on the left and right sides of the unloading section 13, and the first discharging chamber 37 and the second discharging chamber 38 are separated by the partition 32 in the screening box 31. The top of the first discharging chamber 37 is obliquely installed with a screen 33, and the lump ore can be screened out through the screen 33. The bottom of the first discharging chamber 37 is connected to the silo 71 through the feeding pipe 7, and the second discharging chamber 38 is connected to the crusher 83 through the lump ore conduit 8. The screen 33 is a strip net. Since the shape of the lump ore is usually uneven, and the lump ore has a greater impact on the screen 33 during the unloading process, it is easy to cause the lump ore to be stuck on the screen 33 during screening. Therefore, a clearing assembly 36 for cleaning the lump ore stuck on the screen 33 is also installed in the screening box 31. Furthermore, side plates 34 are provided on the left and right sides of the screen 33 to prevent the ore from spilling, and a baffle 35 is also provided on the screening box 31 to guide the lump ore so that the lump ore can fall into the lump ore guide tube 8. Fig.12 After the ore material doped with lump ore falls into the screening mechanism 3, the ore material that can be smelted directly passes through the screen 33, and is introduced into the silo 71 from the first discharge chamber 37 through the discharge pipe 7, waiting for smelting; while the lump ore is blocked by the screen 33, and rolls along the screen 33 to the second discharge chamber 38, and is introduced into the lump ore bin 81 through the lump ore guide tube 8 for collection. A vibrating feeder 82 is installed at the bottom of the lump ore bin 81, and the lump ore is transported to the crusher 83 for crushing by the vibrating feeder 82, and then the crushed ore is introduced into the silo 71, waiting for smelting.

[0048] See also Fig. 9 The clearing assembly 36 includes a second telescopic rod 362, a cleaning frame 363, and a cleaning rod 364. The second telescopic rod 362 is vertically fixedly mounted on the second support plate 361. The second support plate 361 is fixed in the screening box 31. The cleaning frame 363 is fixedly connected to the end of the second telescopic rod 362. Cleaning rods 364 corresponding to the gaps of the screen 33 are evenly arranged on the cleaning frame 363. The cleaning rods 364 are parallel to the screen 33, and the length of the cleaning rods 364 is consistent with the length of the strip-shaped screen holes of the screen 33. When in use, the second telescopic rod 362 is controlled to extend, driving the cleaning frame 363 to rise, so that the cleaning rod 364 extends from the strip-shaped screen hole, thereby lifting the block ore stuck on the screen hole to complete the cleaning.

[0049] In some embodiments, see Fig.10The residual material recovery mechanism 4 includes a recovery box 41, a cleaning brush 42, a return pipe 43, a sealing plate 44, a fixing component 45, and a vibration motor 46. The recovery box 41 is fixedly arranged at the bottom of the unloading section 13, and the bottom surface of the recovery box 41 is an inclined surface. At the lowest point of the bottom, two return pipes 43 are respectively connected to different silos 71. A sealing plate 44 is also installed in the recovery box 41 through the fixing component 45. The return pipe 43 can be blocked by the sealing plate 44, thereby controlling the flow direction of the mineral material; a cleaning brush 42 for cleaning the conveyor belt is installed in the recovery box 41, and a vibration motor 46 for convenient material unloading is installed at the bottom of the recovery box 41. When in use, a small amount of mineral material passing through the gap 6 falls into the recovery box 41 under the action of gravity, and the conveyor belt of the conveyor belt machine 1 can be cleaned by the cleaning brush 42 to prevent the mineral material from adhering to the conveyor belt. The mineral material in the recovery box 41 is introduced into the silo 71 from the return pipe 43 under the action of the vibration motor 46, and the return pipe 43 can be blocked by the sealing plate 44, thereby controlling the flow of the mineral material to the designated silo 71.

[0050] See also Fig.11 The fixing assembly 45 includes a hinge support 451, a fixing seat 452, and a pressure block 453. The hinge support 451 and the fixing seat 452 are both fixed on the recycling box 41, and the distance between the hinge support 451 and the fixing seat 452 is consistent with the width of the sealing plate 44. A pressure block 453 is hinged on the hinge support 451. When in use, the sealing plate 44 is placed between the hinge support 451 and the fixing seat 452, and the bottom of the sealing plate 44 blocks the corresponding return pipe 43 opening. The sealing plate 44 is fixed by pressing the pressure block 453, and then a pin is used to pass through the end of the pressure block 453 and fixedly connected to the fixing seat 452 to complete the fixation.

[0051] Specific working process:

[0052] The ore material doped with lump ore enters the unloading section 13 from the feeding section 11, and is guided by the unloading plate 29 to slide onto the screen 33. Qualified ore material directly passes through the screen 33 and is introduced into the silo 71. The lump ore is blocked by the screen 33 and is introduced into the crusher 83 for crushing. A small amount of ore material passes through the gap 6 and enters the recovery box 41, and is then introduced into the silo 71 via the return pipe 43, completing the automatic screening and crushing of the ore material. While reducing the labor intensity of the workers, the friction on the unloading plate 29 and the conveying belt of the conveyor belt machine 1 is reduced, thereby increasing their service life.

[0053] Finally, it should be noted that, in this article, relationships such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms include, include or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A mineral material screening and crushing device, characterized in that: The invention comprises a conveyor belt conveyor (1), a discharge mechanism (2), a screening mechanism (3), and a residual material recovery mechanism (4). The conveyor belt conveyor (1) is provided with a leveling component (12), and the conveyor belt conveyor (1) is divided into a feeding section (11) and a discharge section (13) by the leveling component (12). The discharge section (13) is provided with a discharge mechanism (2) capable of adjusting the discharge direction, and a gap (6) is left between the discharge mechanism (2) and the conveyor belt conveyor (1); screening mechanisms (3) corresponding to the discharge mechanism (2) are provided on both sides of the conveyor belt conveyor (1); and a residual material recovery mechanism (4) for recovering mineral materials leaking through the gap (6) is also installed at the bottom of the discharge section (13).

2. The mineral material screening and crushing device according to claim 1, characterized in that: The leveling component (12) comprises an adjusting box (122), an adjusting block (123), an adjusting tooth (124), a pressure roller (126), and a latching tooth (1291); the adjusting box (122) is fixed on the conveyor belt machine (1) through a first support plate (121), and the adjusting block (123) is slidably connected inside the adjusting box (122); a pressure roller (126) corresponding to the conveyor belt of the conveyor belt machine (1) is rotatably mounted on the adjusting block (123); the adjusting teeth (124) are evenly arranged on the left and right sides of the adjusting block (123); a latching tooth (1291) corresponding to the adjusting tooth (124) is slidably mounted on the adjusting box (122); and the height position of the pressure roller (126) can be adjusted by latching the latching tooth (1291) on the adjusting teeth (124) at different positions.

3. The mineral material screening and crushing device according to claim 2 is characterized in that: A first spring (125) is arranged at the bottom of the regulating box (122), an end of the first spring (125) is fixedly connected to the regulating block (123), and the first spring (125) is always in a compressed state.

4. The mineral material screening and crushing device according to claim 2, characterized in that: A wing plate (127) is arranged on the side of the regulating box (122), a guide rod (1271) is fixed on the wing plate (127), a slider (129) is slidably connected to the guide rod (1271), a latching tooth (1291) corresponding to the regulating tooth (124) is arranged at the end of the slider (129), and a second spring (128) is arranged between the slider (129) and the wing plate (127), and the second spring (128) is always in a compressed state.

5. The mineral material screening and crushing device according to claim 1, characterized in that: The conveyor belt machine (1) is provided with a first bracket (14), on which a support roller (15) corresponding to the unloading section (13) is rotatably mounted.

6. The mineral material screening and crushing device according to claim 1, characterized in that: The unloading mechanism (2) comprises a second bracket (22), a first telescopic rod (24), a reversing plate (28), and a unloading plate (29); the second bracket (22) is fixedly mounted on a fixed plate (21); a reversing plate (28) is hingedly mounted at the end of the second bracket (22); a unloading plate (29) is fixedly mounted on the reversing plate (28); a gap (6) is left between the bottom surface of the unloading plate (29) and the conveying belt of the conveyor belt machine (1); one end of the first telescopic rod (24) is hingedly mounted on the fixed plate (21), and the other end is hingedly connected to the reversing plate (28); the unloading direction of the reversing plate (28) can be adjusted by extending or shortening the first telescopic rod (24).

7. The mineral material screening and crushing device according to claim 1, characterized in that: The screening mechanism (3) comprises a screening box (31), a partition (32), a screen (33), and a clearing assembly (36); the screening box (31) is arranged on the left and right sides of the discharge section (13); the screening box (31) is separated into a first discharge chamber (37) and a second discharge chamber (38) by the partition (32); the first discharge chamber (37) is provided with a screen (33) at an angle; the screening box (31) is also provided with a clearing assembly (36) for clearing the screen (33); the first discharge chamber (37) is connected to a silo (71) via a feed pipe (7); and the second discharge chamber (38) is connected to a crusher (83) via a lump ore guide tube (8).

8. The mineral material screening and crushing device according to claim 7, characterized in that: The blockage clearing assembly (36) comprises a second telescopic rod (362), a cleaning frame (363), and a cleaning rod (364); the second telescopic rod (362) is fixedly installed in the screening box (31); the end of the second telescopic rod (362) is fixedly connected to the cleaning frame (363); cleaning rods (364) corresponding to the gaps of the screen (33) are evenly arranged on the cleaning frame (363); and the cleaning rods (364) are parallel to the screen (33).

9. The mineral material screening and crushing device according to claim 1, characterized in that: The residual material recovery mechanism (4) comprises a recovery box (41), a cleaning brush (42), a return pipe (43), a sealing plate (44), a fixing assembly (45), and a vibration motor (46); the recovery box (41) is fixedly arranged at the bottom of the unloading section (13), and the bottom of the recovery box (41) is respectively connected to different silos (71) through two return pipes (43); a sealing plate (44) is also installed in the recovery box (41) through the fixing assembly (45); the return pipe (43) can be blocked by the sealing plate (44), thereby controlling the flow direction of the mineral material; a cleaning brush (42) for cleaning the conveying belt of the conveyor belt machine (1) is installed in the recovery box (41), and a vibration motor (46) is installed at the bottom of the recovery box (41).

10. The mineral material screening and crushing device according to claim 9, characterized in that: The fixing assembly (45) comprises a hinge support (451), a fixing seat (452), and a pressure block (453); the hinge support (451) and the fixing seat (452) are both fixed on the recovery box (41); the distance between the hinge support (451) and the fixing seat (452) is consistent with the width of the sealing plate (44); the pressure block (453) is hinged on the hinge support (451); and the end of the pressure block (453) is connected to the fixing seat (452) by a latch.

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