Multi-stage crushing device applied to bauxite clinker production and operation method of multi-stage crushing device

Abstract

According to the multi-stage crushing device applied to bauxite clinker production and the operation method of the multi-stage crushing device, the feeding mechanism, the primary crushing mechanism, the secondary crushing mechanism and the screening and discharging mechanism are arranged, so that abnormal materials in incoming materials can be separated out and crushed, and the quality of the abnormal materials is improved; material blocking and stacking caused by abnormal materials and potential safety hazards caused by manual crushing of the abnormal materials by workers are avoided; according to the multi-stage crushing device disclosed by the invention, the bauxite mineral aggregate is subjected to abnormal material crushing, primary crushing and secondary crushing, so that the crushed mineral aggregate blocks are uniform in size, and when the mineral aggregate crushed by the multi-stage crushing device disclosed by the invention is fired, the temperature of a kiln can be relatively reduced, the energy consumption can be reduced, unqualified bauxite clinker blocks are greatly reduced, and the quality of bauxite clinker is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bauxite ore crushing, in particular to a multi-stage crushing device used in bauxite clinker production and an operating method thereof. Background Art

[0002] Bauxite, also known as bauxite or bauxite, is mainly composed of aluminum oxide. It is a hydrated aluminum oxide containing impurities and is a soil-like mineral. It is white or grayish white, and is brownish yellow or light red due to the iron content. Density 3.45g / cm 3 , hardness 1-3, opaque, brittle. Extremely difficult to melt. Insoluble in water, soluble in sulfuric acid and sodium hydroxide solution. Mainly used in aluminum smelting and refractory materials.

[0003] First of all, from the physical properties of bauxite, we can know that bauxite has low hardness and is easy to break. However, when bauxite is broken, abnormal bauxite materials, that is, large blocks of ore, cannot fall down and will be stuck at the discharge of the crushing equipment. At the least, it will affect the falling speed and cause the ore to pile up. At worst, the staff needs to use a sledgehammer to break the abnormal materials, which not only affects the production efficiency, but also poses a great safety hazard. Casualties caused by hitting the blocks have also occurred.

[0004] Secondly, when making raw materials for refractory products, many manufacturers crush the bauxite ore once and then transfer the ore to the kiln for firing. Due to the presence of large pieces of ore that are not completely crushed, the kiln temperature must be increased to burn the large pieces of ore. Insufficient temperature will affect the quality of the clinker.

[0005] Therefore, there is an urgent need to design a device that can handle abnormal materials and crush bauxite ore multiple times. Summary of the invention

[0006] The present invention provides a multi-stage crushing device and an operating method thereof for use in bauxite clinker production to solve the technical problems raised in the above-mentioned background technology.

[0007] The present invention provides a multi-stage crushing device for bauxite clinker production and an operation method thereof. The multi-stage crushing device for bauxite clinker production comprises a mounting frame, a feeding mechanism, a primary crushing mechanism, a secondary crushing mechanism, a screening and discharging mechanism, wherein the mounting frame is used to support and install various mechanism components; The feeding mechanism comprises a feeding hopper, a first conveyor belt, and an abnormal material separation and crushing assembly. The feeding hopper is fixed on a mounting frame. A hopper cover is detachably provided on the top of the feeding hopper. Inlets are provided on the left and right sides of the feeding hopper. A discharge port is provided at the bottom of the feeding hopper. Bauxite ore is input from the inlet by the first conveyor belt. The input bauxite ore passes through the abnormal material separation and crushing assembly and enters the primary crushing mechanism together with normal material from the discharge port. The primary crushing mechanism comprises a feeding channel, a crushing chamber and a first driving assembly, the upper end of the feeding channel is connected with the discharge port of the feeding mechanism, the feeding channel comprises an inner channel plate and an outer channel plate, the lower end of the feeding channel is connected with the crushing chamber, the crushing chamber comprises a fixed front plate, a fixed rear plate, a fixed outer plate and a slidable inner plate, the front plate and the rear plate are symmetrically arranged, and the inner sides of the front plate and the rear plate are both provided with side plate sliding grooves, side plate sliding blocks matching with the side plate sliding grooves are arranged on both sides of the inner plate, the upper end of the outer plate is connected with the lower end of the outer channel plate, the upper end of the inner plate is connected with the lower end of the inner channel plate by a flexible wear-resistant rubber belt, the lower end of the inner plate is connected with the side wall of the channel below it by a flexible wear-resistant rubber belt, and matching serrated protrusions are arranged on the opposite sides of the outer plate and the inner plate, and the first driving assembly is used to drive the inner plate to slide in the crushing chamber, and the outer plate and the inner plate cooperate to crush the mineral material in the crushing chamber; The secondary crushing mechanism comprises a roller crushing assembly and a second driving assembly, wherein the second driving assembly provides power to the roller crushing assembly to perform secondary crushing on the mineral material after the primary crushing mechanism has completed the operation; The screening and discharging mechanism includes a vibrating screen, a second conveyor belt and a discharging trough. The vibrating screen is arranged below the double-roll crushing assembly. The screened material of the vibrating screen is output by the second conveyor belt, and the screened material of the vibrating screen is output by the inclined discharging trough.

[0008] Optionally, the abnormal material separation and crushing assembly includes inclined rods, a crushing table, a baffle plate, mounting blocks, hydraulic cylinders, first inclined blocks, first chutes, first sliders, second inclined blocks, pressing blocks, guide posts, second chutes, second sliders, and first springs. The inclined rods are inclined and arranged in parallel on both sides of the crushing table. Baffle plates are connected to the two outermost inclined rods. One end of the inclined rod is connected to the inner wall of the feed hopper, and the other end is connected to the side surface of the crushing table and is flush with the upper surface of the crushing table. A plurality of inclined rods are provided. The mounting blocks are fixed above the crushing table. The first inclined blocks are slidably arranged horizontally on the mounting blocks. The upper surface of the mounting blocks is provided with a "丄"-shaped first chute. The bottom surface of the first inclined blocks is fixed with a "丄"-shaped first slider that cooperates with the first chute. The "丄"-shaped first chute restricts the upward displacement of the first slider. The first inclined blocks are provided with first inclined surfaces. One side of the first inclined blocks close to the front of the feed hopper is connected to the output end of the hydraulic cylinder through a push rod. The hydraulic cylinders are fixed on the mounting frame. The mounting blocks are vertically provided with mounting grooves. A second inclined block is slidably arranged up and down in the mounting grooves. The second inclined blocks are provided with second inclined surfaces. The first inclined surfaces cooperate with the second inclined surfaces. Second chutes are provided on both sides of the mounting grooves. Second sliders are fixed on both sides of the second inclined blocks and cooperate with the second chutes. Guide posts are vertically fixed in the second chutes. The guide posts pass through the second sliders. The second sliders can slide along the guide posts in the second chutes. First springs are sleeved on the guide posts below the second sliders. The bottom of the second inclined blocks is fixedly connected with pressing blocks. The pressing blocks can extend out of the mounting blocks from the bottom of the mounting grooves of the mounting blocks and cooperate with the crushing table to complete the downward pressing and crushing of abnormal materials.

[0009] Optionally, the feeding mechanism also includes a material clearing component, which includes a fixed plate, a second spring, a sliding mounting block, an inclined surface block, a third spring, a bolt, a material clearing plate, an inclined surface top pulling block, a connecting rod, and a fixed inclined surface top block. The fixed plate is fixed to the side wall at the end of the mounting block. The sliding mounting block can be slidably arranged on the front side of the fixed plate. A second spring is connected between the fixed plate and the sliding mounting block. A sliding mounting groove is vertically provided on the upper surface of the sliding mounting block and does not penetrate therethrough. The inclined surface block can be slidably arranged in the sliding mounting groove. A bolt is screwed on the bottom surface of the inclined surface block. The part of the bolt located in the sliding mounting groove is sleeved with a third spring. One end of the bolt is away from the inclined surface block The cam block is provided with a third inclined surface, the third inclined surface faces the side away from the fixed plate, the clearing plate is connected to the sliding mounting block, the inclined surface top pulling block is connected to the push-pull rod through a connecting rod, the position of the inclined surface top pulling block matches the position of the inclined surface clamping block, the inclined surface top pulling block is provided with a fourth inclined surface, the fourth inclined surface cooperates with the third inclined surface, the fixed inclined surface top block is fixed on the side where the sliding mounting block is located at the front of the mounting block, the fixed inclined surface top block is provided with a fifth inclined surface cooperating with the third inclined surface, the fixed inclined surface top block is provided with a passing groove for accommodating the inclined surface top pulling block to pass through, and the width of the third inclined surface is greater than the width of the fourth inclined surface.

[0010] Optionally, the first driving assembly includes a driving motor, a first driving disc, a disc mounting seat, a support plate, and a motion frame, the driving motor is fixedly mounted on the mounting frame, the output end of the driving motor is connected to the first driving disc through a driving shaft, the first driving disc is rotatably mounted on the disc mounting seat, the disc mounting seat is fixed to the support plate, the support plate is fixedly connected to the mounting frame, an arc rack portion is arranged on the outer circumference of the first driving disc, the arc length corresponding to the arc rack portion is less than half of the circumference of the first driving disc, the motion frame is surrounded by a semicircular frame symmetrically arranged on the left and right sides and a linear rack frame symmetrically arranged on the upper and lower sides, guide fixing blocks are arranged on the left and right sides of the linear rack frame, a guide rod is fixed between the two guide fixing blocks on the same side, guide slide grooves for sliding of the guide rod are arranged on the upper and lower sides of the disc mounting seat, and inner side plates are connected on the left and right sides of the motion frame.

[0011] Optionally, the second driving assembly includes a second driving disc, a connecting column, a connecting rod, a sliding rod, a guide groove, and a driven gear. The second driving disc is coaxially arranged with the first driving disc, and the end of the driving shaft driving the first driving disc away from the driving motor is connected to the second driving disc. A connecting column is rotatably arranged on the outer side of the second driving disc. The end of the connecting column away from the second driving disc is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the upper end of the sliding rod. The sliding rod can slide up and down in the guide groove, and the guide groove is fixed on the mounting frame. A rack section that does not interfere with the guide groove is arranged at the lower part of the sliding rod, and driven gears meshing with the rack section are arranged on both sides of the rack section.

[0012] Optionally, the pair of roller crushing assembly includes two symmetrically arranged crushing rollers, with a distance between the two crushing rollers for qualified mineral materials to pass through, and protrusions for squeezing and crushing the mineral materials are evenly arranged on the roller surfaces of the crushing rollers. Roller shafts are arranged at both ends of the crushing rollers, and the roller shafts are rotatably connected to the mounting frame. The roller shaft on the side close to the driven gear is connected to the driven gear, and the driven gear can drive the roller shaft to rotate.

[0013] Optionally, the present invention also provides an operating method of a multi-stage crushing device for bauxite clinker production, comprising the following steps: S1, sorting and crushing abnormal materials of bauxite ore, the bauxite ore enters a feeding mechanism, and the abnormal materials with large blocks are selected and crushed in the feeding mechanism; S2, the bauxite ore is crushed once, and the normal materials and the abnormal materials processed by the feeding mechanism enter the crushing chamber of the primary crushing mechanism through a feeding channel for crushing; S3, the bauxite ore is crushed twice, the ore crushed by the primary crushing mechanism continues to fall to the secondary crushing mechanism, and the ore is crushed for the second time by a roller crushing assembly; S4, the crushed bauxite ore is screened, and the crushed bauxite ore is screened by a vibrating screen; S5, the screened bauxite ore is discharged, the upper material of the vibrating screen is sent out through a second conveyor belt, and is crushed again, and the lower material of the vibrating screen is sent out through a discharge trough.

[0014] The beneficial effects of the present invention are as follows: a multi-stage crushing device for bauxite clinker production provided by the present invention can separate abnormal materials from incoming materials through the abnormal material separation and crushing components arranged in the feeding mechanism, and crush the abnormal materials, thereby avoiding the safety hazards caused by blockage and stacking of materials due to abnormal materials and manual crushing of abnormal materials by staff; by setting the feeding mechanism, the primary crushing mechanism, and the secondary crushing mechanism, the bauxite ore is crushed multiple times, so that the size of the crushed ore blocks is uniform, and when the crushed ore of the present invention is fired, the kiln temperature can be relatively reduced, the energy consumption can be reduced, and the quality of bauxite clinker can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of a multi-stage crushing device for bauxite clinker production provided by the present invention; Figure 2 This is a schematic diagram of the structure of a feeding mechanism of a multi-stage crushing device for bauxite clinker production provided by the present invention; Figure 3 yes Figure 2 Enlarged schematic diagram of circle A.

[0017] Figure 4 This is a schematic diagram of the structure of a first chute and a first slider of a multi-stage crushing device for bauxite clinker production provided by the present invention; Figure 5 This is a schematic diagram of the structure of installing the second inclined block of a multi-stage crushing device for bauxite clinker production provided by the present invention in a mounting block; Figure 6 It is a schematic diagram of the structure of the inclined surface block of a multi-stage crushing device for bauxite clinker production provided by the present invention being installed in a sliding installation block; Figure 7 This is a schematic diagram of the structure of the crushing chamber of a multi-stage crushing device for bauxite clinker production provided by the present invention; Figure 8 This is a schematic diagram of the structure of a second drive assembly of a multi-stage crushing device for bauxite clinker production provided by the present invention; Fig. 9 This is a schematic diagram of the connection structure of the first drive assembly and the second drive assembly of a multi-stage crushing device for bauxite clinker production provided by the present invention; In the figure: 100. mounting frame, 200. feeding mechanism, 201. feeding hopper, 2011. hopper cover, 2012. feeding port, 202. first conveyor belt, 203. abnormal material separation and crushing assembly, 2031. inclined rod, 2032. crushing table, 2033. mounting block, 2034. hydraulic cylinder, 2035. first inclined block, 20351. first inclined surface, 2036. first chute, 2037. first slider, 2038. second inclined block, 20381. second inclined surface, 2039. pressing block, 20310. guide Column, 20311. Second slide, 20312. Second slider, 20313. First spring, 20314. Push-pull rod, 204. Cleaning assembly, 2041. Fixed plate, 2042. Second spring, 2043. Sliding mounting block, 20431. Sliding mounting groove, 2044. Inclined block, 20441. Third inclined plane, 2045. Third spring, 2046. Bolt, 2047. Cleaning plate, 2048. Inclined top pull block, 20481. Fourth inclined plane, 2049. Connecting rod, 20410. Fixed inclined plane Top block, 204101. Fifth inclined plane, 204102. Through slot, 300. Primary crushing mechanism, 301. Feeding channel, 302. Crushing chamber, 3021. Front plate, 3022. Rear plate, 3023. Outer plate, 3024. Inner plate, 3025. Side plate chute, 3026. Flexible wear-resistant rubber belt, 303. First drive assembly, 3031. Drive motor, 3032. First drive disc, 30321. Circular arc rack, 3033. Disc mounting seat, 3034. Motion frame, 30341. Straight Wire rack frame, 30342. Semicircular frame, 30343. Guide fixed block, 30344. Guide rod, 400. Secondary crushing mechanism, 401. Double roller crushing assembly, 4011. Crushing roller, 402. Second driving assembly, 4021. Second driving disc, 4022. Connecting column, 4023. Connecting rod, 4024. Sliding rod, 40241. Rack segment, 4025. Guide groove, 4026. Driven gear, 500. Screening and discharging mechanism, 501. Vibrating screen, 502. Second conveyor belt, 503. Discharging trough. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. It will be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] See also Figures 1 to 9 The multi-stage crushing device used in the production of bauxite clinker of the present invention comprises a mounting frame 100, a feeding mechanism 200, a primary crushing mechanism 300, a secondary crushing mechanism 400, and a screening and discharging mechanism 500. The mounting frame 100 is used to support and install various mechanism components; In this embodiment, the feeding mechanism 200 includes a feeding hopper 201, a first conveyor belt 202, and an abnormal material separation and crushing assembly 203. The feeding hopper 201 is fixed on the mounting frame 100. A hopper cover 2011 is detachably provided on the top of the feeding hopper 201. Feed ports 2012 are provided on the left and right sides of the feeding hopper 201. A discharge port is provided at the bottom of the feeding hopper 201. Bauxite ore is input from the feeding port 2012 by the first conveyor belt 202. The input bauxite ore is subjected to the action of the abnormal material separation and crushing assembly 203, and enters the primary crushing mechanism 300 from the discharge port together with normal material. Specifically, the abnormal material separation and crushing assembly 203 includes inclined rods 2031, a crushing table 2032, mounting blocks 2033, hydraulic cylinders 2034, first inclined blocks 2035, first chutes 2036, first sliders 2037, second inclined blocks 2038, pressing blocks 2039, guide posts 20310, second chutes 20311, second sliders 20312, and first springs 20313. The inclined rods 2031 are inclined and arranged in parallel on both sides of the crushing table 2032. The two outermost inclined rods 2031 are both connected with baffle plates. One end of the inclined rod 2031 is connected to the inner side wall of the feed hopper 201, and the other end is connected to the side surface of the crushing table 2032 and is flush with the upper surface of the crushing table 2032. There are multiple inclined rods 2031, and the distance between adjacent inclined rods 2031 is the same. The mounting blocks 2033 are fixed above the crushing table 2032. The first inclined blocks 2035 can be horizontally slidably arranged on the mounting blocks 2033. The upper surface of the mounting blocks 2033 is provided with a "丄"-shaped first chute 2036. The bottom surface of the first inclined block 2035 is fixed with a "丄"-shaped first slider 2037 that cooperates with the first chute 2036. The "丄"-shaped first chute 2036 restricts the upward displacement of the first slider 2037. The first inclined block 2035 is provided with a first inclined surface 20351. One side of the first inclined block 2035 close to the front of the feed hopper 201 is connected to the output end of the hydraulic cylinder 2034 through a push rod 20314. The hydraulic cylinder 2034 is fixed on the mounting frame 100. The mounting blocks 2033 are vertically provided with mounting grooves. A second inclined block 2038 can be slidably arranged up and down in the mounting grooves. The second inclined block 2038 is provided with a second inclined surface 20381. The first inclined surface 20351 cooperates with the second inclined surface 20381. Second chutes 20311 are arranged on both sides of the mounting grooves. Second sliders 20312 fixed to both sides of the second inclined block 2038 cooperate with the second chutes 20311. Guide posts 20310 are vertically fixed in the second chutes 20311. The guide posts 20310 pass through the second sliders 20312, and the second sliders 20312 can slide along the guide posts 20310 in the second chutes 20311. A first spring 20313 is sleeved on the guide posts 20310 below the second sliders 20312. The bottom of the second inclined block 2038 is fixedly connected with a pressing block 2039. The pressing block 2039 can extend out of the mounting blocks 2033 from the bottom of the mounting grooves of the mounting blocks 2033 and cooperate with the crushing table 2032 to complete the downward pressing and crushing of abnormal materials. When in use, the bauxite ore is fed into the feed hopper 201 through the feeding port 2012 provided on the first conveyor belt 202. A flexible rubber curtain can be provided at the feeding port 2012 to reduce dust escape. The bauxite ore falls onto the inclined rods 2031. The normal materials continue to fall through the spaces between the inclined rods 2031 to the discharge port of the feed hopper 201. The abnormal materials are separated and crushed by the abnormal material separation and crushing assembly 203. The abnormal materials in the present invention refer to bauxite ore with larger lumps, which are prone to causing material blockage and stacking in daily production and require manual crushing by workers.Abnormal materials fall onto the inclined rod 2031. Since the inclined rod 2031 is inclined and multiple inclined rods 2031 are arranged in parallel to form an inclined rod 2031 combination, most of the mineral materials fall directly on the inclined rod 2031 combination, and the abnormal materials are prevented from falling by the inclined rod 2031. Under the action of the inclined rod 2031, the mineral materials slide down along the inclined rod 2031 to the crushing table 2032. The mineral materials falling to both sides of the outermost inclined rod 2031 fall into the range of the inclined rod 2031 combination under the action of the baffle. The hydraulic cylinder 2034 is started, and the piston rod of the hydraulic cylinder 2034 pushes the first inclined block 2035 to move along the first slide groove 2036. The first inclined surface 20351 and the first inclined surface 20351 are connected to the crushing table 2032. The second inclined surface 20381 contacts, the first inclined block 2035 continues to move forward, the second inclined block 2038 moves downward under the action of the first inclined block 2035, the second slider 20312 moves downward along the guide column 20310, the second inclined block 2038 compresses the first spring 20313, and at the same time, the second inclined block 2038 drives the pressing block 2039 to press down and crush the abnormal material on the crushing table 2032, then the hydraulic cylinder 2034 returns, the first inclined block 2035 retreats under the drive of the hydraulic cylinder 2034, and the second slider 20312 moves upward under the elastic force of the first spring 20313 until the second inclined block 2038 is reset; Furthermore, the feeding mechanism 200 also includes a cleaning component 204, which includes a fixed plate 2041, a second spring 2042, a sliding mounting block 2043, an inclined clamping block 2044, a third spring 2045, a bolt 2046, a cleaning plate 2047, an inclined top pull block 2048, a connecting rod 2049, and a fixed inclined top block 20410. The fixed plate 2041 is fixed to the side wall at the end of the mounting block 2033, the sliding mounting block 2043 can be slidably arranged on the front side of the fixed plate 2041, a second spring 2042 is connected between the fixed plate 2041 and the sliding mounting block 2043, a sliding mounting groove 20431 is vertically opened downwardly on the upper surface of the sliding mounting block 2043 without passing through, and the inclined clamping block 2044 can be slidably arranged on In the sliding installation groove 20431, the bottom surface of the inclined surface block 2044 is screwed with a bolt 2046, and the part of the bolt 2046 located in the sliding installation groove 20431 is sleeved with a third spring 2045, and the end of the bolt 2046 away from the inclined surface block 2044 passes through the sliding installation groove 20431 and is fixed with the sliding installation block 2043, and the inclined surface block 2044 is provided with a third inclined surface 20441, and the third inclined surface 20441 faces the side away from the fixed plate 2041, and the cleaning plate 2047 is connected to the sliding installation block 2043, and the inclined surface top pull block 2048 is connected to the push-pull rod 20314 through the connecting rod 2049, and the position of the inclined surface top pull block 2048 matches the position of the inclined surface block 2044, and the inclined surface top pull block 2048 is provided with a third inclined surface 20441. There are four inclined surfaces 20481, and the fourth inclined surface 20481 cooperates with the third inclined surface 20441. When the push-pull rod 20411 drives the inclined surface top pull block 2048 to move forward to the position of the inclined surface clamping block 2044, the fourth inclined surface 20481 can contact the third inclined surface 20441. The fixed inclined surface top block 20410 is fixed on the side where the sliding mounting block 2043 is located at the front of the mounting block 2033. The fixed inclined surface top block 20410 is provided with a fifth inclined surface 204101 that cooperates with the third inclined surface 20441. The fixed inclined surface top block 20410 is provided with a passing groove 204102 that allows the inclined surface top pull block 2048 to pass through. The width of the third inclined surface 20441 is greater than the width of the fourth inclined surface 20481. When the hydraulic cylinder 2034 pushes the first inclined block 20441 forward, the hydraulic cylinder 2034 pushes the first inclined block 20441 forward. 035, at the same time, the first inclined block 2035 drives the inclined surface top pulling block 2048 to move forward, the inclined surface top pulling block 2048 contacts the inclined surface clamping block 2044, the fourth inclined surface 20481 located at the inclined surface top pulling block 2048 contacts the third inclined surface 20441 located at the inclined surface clamping block 2044, the inclined surface top pulling block 2048 continues to move forward, and the inclined surface clamping block 2044 moves downward in the sliding installation groove 20431 under the action of the inclined surface top pulling block 2048. The third spring 2045 is compressed, and the inclined surface top pulling block 2048 continues to move forward. When the inclined surface top pulling block 2048 and the inclined surface clamping block 2044 end their action, the inclined surface clamping block 2044 bounces upward and resets under the elastic force of the third spring 2045. At this time, the first inclined block 2035 moves to the maximum position.That is, the second inclined block 2038 moves downward to the lowest position, and then the hydraulic cylinder 2034 is reset. At this time, the back of the inclined top pulling block 2048 contacts the back of the inclined clamping block 2044, and the inclined top pulling block 2048 pulls the inclined clamping block 2044 to move. The sliding mounting block 2043 moves under the drive of the inclined clamping block 2044, and the cleaning plate 2047 moves under the drive of the sliding mounting block 2043. The cleaning plate 2047 cleans the ore on the crushing table 2032. When it moves to the fixed inclined plane top block 20410, the inclined plane top pull block 2048 passes through the through slot 204102, and the fifth inclined plane 204101 of the fixed inclined plane top block 20410 contacts the third inclined plane 20441 of the inclined plane clamping block 2044, and the inclined plane clamping block 2044 moves downward until the inclined plane clamping block 2044 is separated from the inclined plane top pull block 2048, and the sliding mounting block 2043 is reset under the elastic force of the second spring 2042, and the cleaning plate 2047 also returns to the starting position.

[0021] In this embodiment, the primary crushing mechanism 300 includes a feeding channel 301, a crushing chamber 302 and a first driving assembly 303. The upper end of the feeding channel 301 is connected to the discharge port of the feeding mechanism 200. The feeding channel 301 includes an inner channel plate and an outer channel plate. The lower end of the feeding channel 301 is connected to the crushing chamber 302. The crushing chamber 302 includes a fixed front plate 3021, a fixed rear plate 3022, a fixed outer plate 3023 and a slidable inner plate 3024. The front plate 3021 and the rear plate 3022 are symmetrically arranged, and the inner sides of the front plate 3021 and the rear plate 3022 are both provided with side plate slide grooves 3025. The inner plate Side plate sliders matched with the side plate slide grooves 3025 are arranged on both sides of 3024, the upper end of the outer plate 3023 is connected to the lower end of the outer channel plate, the upper end of the inner plate 3024 is connected to the lower end of the inner channel plate through a flexible wear-resistant rubber belt 3026, and the lower end of the inner plate 3024 is connected to the side wall of the channel below it through a flexible wear-resistant rubber belt 3026. Matching serrated protrusions are arranged on the opposite sides of the outer plate 3023 and the inner plate 3024. The first driving component 303 is used to drive the inner plate 3024 to slide in the crushing chamber 302, and the outer plate 3023 and the inner plate 3024 cooperate to crush the mineral materials in the crushing chamber 302; Specifically, the first driving assembly 303 includes a driving motor 3031, a first driving disc 3032, a disc mounting seat 3033, a support plate, and a motion frame 3034. The driving motor 3031 is fixedly mounted on the mounting frame 100. The output end of the driving motor 3031 is connected to the first driving disc 3032 through a driving shaft. The first driving disc 3032 is rotatably mounted on the disc mounting seat 3033. The disc mounting seat 3033 is fixed on the support plate. The support plate is fixedly connected to the mounting frame 100. The outer periphery of 3032 is provided with an arc rack portion 30321, and the arc length corresponding to the arc rack portion 30321 is less than half of the circumference of the first driving disc 3032. The motion frame 3034 is surrounded by a semicircular frame 30342 symmetrically arranged on the left and right sides and a linear rack frame 30341 symmetrically arranged on the upper and lower sides. The linear rack frame 30341 is provided with a guide fixing block 30343 on both sides of the left and right sides, and a guide rod 30344 is fixed between the two guide fixing blocks 30343 on the same side. The disc mounting seat 3033 is provided with a guide rod 30344 on the upper and lower sides. The guide slide groove of the guide rod 30344 slides, and the inner side plates 3024 are connected to the left and right sides of the motion frame 3034. When in use, the drive motor 3031 is started, the drive motor 3031 drives the drive shaft to rotate, the drive shaft drives the first drive disc 3032 to rotate, the arc rack part 30321 of the first drive disc 3032 rotates, and the arc rack part 30321 does not contact the two inner sides of the motion frame 3034 during the rotation process. When the arc rack part 30321 rotates to the linear rack frame 30341 of the motion frame 3034, Due to the mutual meshing of the racks, the moving frame 3034 will be driven to swing left and right. The guide fixing block 30343 set on the moving frame 3034 will drive the guide rod 30344 to swing left and right in the guide slot set on the disc mounting seat 3033. The guide fixing block 30343, the guide rod 30344 and the guide slot make the movement of the moving frame 3034 more stable. The inner side plate 3024 connected to the moving frame 3034 continuously makes reciprocating motion under the action of the moving frame 3034 to impact and crush the mineral materials in the crushing chamber 302.

[0022] In this embodiment, the secondary crushing mechanism 400 includes a roller crushing assembly 401 and a second drive assembly 402. The second drive assembly 402 provides power to the roller crushing assembly 401 to perform secondary crushing on the mineral material after the primary crushing mechanism 300 has completed the operation. Specifically, the second driving assembly 402 includes a second driving disc 4021, a connecting column 4022, a connecting rod 4023, a sliding rod 4024, a guide groove 4025, and a driven gear 4026. The second driving disc 4021 is coaxially arranged with the first driving disc 3032, and the end of the driving shaft driving the first driving disc 3032 away from the driving motor 3031 is connected to the second driving disc 4021. The outer side of the second driving disc 4021 is rotatably provided with a connecting column 4022, and the connecting rod 4023 is connected to the driven gear 4026. One end of the connecting column 4022 away from the second driving disc 4021 is rotatably connected to one end of the connecting rod 4023, and the other end of the connecting rod 4023 is rotatably connected to the upper end of the sliding rod 4024. The sliding rod 4024 can slide up and down in the guide groove 4025, and the guide groove 4025 is fixed on the mounting frame 100. The lower part of the sliding rod 4024 is provided with a rack segment 40241 that does not interfere with the guide groove 4025, and the two sides of the rack segment 40241 are provided with driven gears 4026 that mesh with it. Specifically, the roller crushing assembly 401 includes two symmetrically arranged crushing rollers 4011, and a distance is left between the two crushing rollers 4011 for qualified mineral materials to pass through. The roller surfaces of the crushing rollers 4011 are evenly provided with protrusions for squeezing and crushing the mineral materials. Roller shafts are provided at both ends of the crushing rollers 4011, and the roller shafts can be rotatably connected to the mounting frame 100. The roller shaft on the side close to the driven gear 4026 is connected to the driven gear 4026, and the driven gear 4026 can drive the roller shaft to rotate. When in use, since the second driving disc 4021 is coaxially arranged with the first driving disc 3032, the driving shaft drives the second driving disc 4021 to rotate, and the second driving disc 4021 drives the connecting column 4022 to make a circular motion. , the connecting column 4022 drives the connecting movement. Since the connecting rod 4023 is rotatably connected to the sliding rod 4024 and the sliding rod 4024 is connected to the guide groove 4025, the guide rod 30344 reciprocates up and down, and the rack segment 40241 arranged on the guide rod 30344 also reciprocates up and down. The rack segment 40241 is engaged with the driven gear 4026, driving the driven gear 4026 to reciprocate clockwise and counterclockwise for less than one circle. The driven gear 4026 drives the two crushing rollers 4011 to reciprocate clockwise and counterclockwise. The two crushing rollers 4011 squeeze and crush the ore falling thereon, and the crushed ore falls from the space between the two crushing rollers 4011.

[0023] In this embodiment, the screening and discharging mechanism 500 includes a vibrating screen 501, a second conveyor belt 502 and a discharging trough 503. The vibrating screen 501 is arranged below the double-roll crushing assembly 401. The screened material of the vibrating screen 501 is output by the second conveyor belt 502, and the screened material of the vibrating screen 501 is output by the inclined discharging trough 503. Since the vibrating screen 501 is a prior art and is a very commonly used equipment in production, the present invention will not describe the structure of the vibrating screen 501 in detail, and the vibrating screen 501 can be purchased according to actual needs.

[0024] When used as a whole, bauxite ore enters the feed hopper 201 from the first conveyor belt 202 through the feed port 2012 set on the feed hopper 201, and the bauxite ore falls to the inclined rod 2031. Normal material continues to fall to the discharge port of the feed hopper 201 through the inclined rod 2031, and abnormal material falls onto the inclined rod 2031. Since the inclined rod 2031 is inclined and multiple inclined rods 2031 are arranged in parallel to form an inclined rod 2031 combination, most of the ore falls directly on the inclined rod 2031 combination, and the abnormal material is prevented from falling by the inclined rod 2031. Under the action of the inclined rod 2031, it slides down along the inclined rod 2031 to the crushing table 2032. The ore falling to both sides of the outermost inclined rod 2031 falls within the range of the inclined rod 2031 combination under the action of the baffle. 034 is started, the piston rod of the hydraulic cylinder 2034 pushes the first inclined block 2035 to move along the first slide groove 2036, the first inclined surface 20351 contacts the second inclined surface 20381, the first inclined block 2035 continues to move forward, the second inclined block 2038 moves downward under the action of the first inclined block 2035, the second slider 20312 moves downward along the guide column 20310, the second inclined block 2038 compresses the first spring 20313, and at the same time, the second inclined block 2038 drives the pressing block 2039 to press down and crush the abnormal material on the crushing table 2032, then the hydraulic cylinder 2034 returns, the first inclined block 2035 retreats under the drive of the hydraulic cylinder 2034, and the second slider 20312 moves upward under the elastic force of the first spring 20313 until the second inclined block 2035 moves forward. The block 2038 is reset. At the same time, the push-pull rod 20314 drives the inclined top pull block 2048 to move forward. The inclined top pull block 2048 contacts the inclined clamping block 2044. The fourth inclined surface 20481 located at the inclined top pull block 2048 contacts the third inclined surface 20441 located at the inclined clamping block 2044. The inclined top pull block 2048 continues to move forward. The inclined clamping block 2044 moves downward in the sliding mounting groove 20431 under the action of the inclined top pull block 2048. The third spring 2045 is compressed, and the inclined top pull block 2048 continues to move forward. When the inclined top pull block 2048 and the inclined clamping block 2044 end their action, the inclined clamping block 2044 bounces upward and resets under the elastic force of the third spring 2045. At this time, the first inclined block 2035 moves to The maximum position, that is, the second inclined block 2038 moves downward to the lowest position, and then the hydraulic cylinder 2034 is reset. At this time, the back of the inclined top pulling block 2048 contacts the back of the inclined clamping block 2044, and the inclined top pulling block 2048 pulls the inclined clamping block 2044 to move. The sliding mounting block 2043 moves under the drive of the inclined clamping block 2044, and the cleaning plate 2047 moves under the drive of the sliding mounting block 2043. The cleaning plate 2047 cleans the mineral materials on the crushing table 2032. When the inclined clamping block 2044 moves to the fixed inclined top block 20410, the inclined top pulling block 2048 passes through the through groove 204102, and the fifth inclined surface 204101 of the fixed inclined top block 20410 contacts the third inclined surface 20441 of the inclined clamping block 2044.The inclined surface block 2044 moves downward until the inclined surface block 2044 is disengaged from the inclined surface top pull block 2048, and the sliding mounting block 2043 is reset under the elastic force of the second spring 2042, and the cleaning plate 2047 also returns to the starting position; then the driving motor 3031 is started, and the driving motor 3031 drives the driving shaft to rotate, and the driving shaft drives the first driving disc 3032 to rotate, and the arc rack portion 30321 of the first driving disc 3032 rotates, and the arc rack portion 30321 does not contact the two inner sides of the moving frame 3034 during the rotation process. When the arc rack portion 30321 rotates to the linear rack frame 30341 of the moving frame 3034, due to the mutual meshing between the racks, it will drive the moving frame 3034 to swing left and right, and the moving frame 303 The guide fixing block 30343 arranged on the upper surface of the movable frame 3034 drives the guide rod 30344 to swing left and right in the guide slot arranged on the disc mounting seat 3033. The guide fixing block 30343, the guide rod 30344 and the guide slot make the movement of the moving frame 3034 more stable. The inner plate 3024 connected to the moving frame 3034 continuously performs reciprocating motion under the action of the moving frame 3034 to impact and crush the mineral materials in the crushing chamber 302. The flexible wear-resistant rubber belt 3026 connected to the inner plate 3024 can make the inner plate 3024 perform reciprocating motion without leaking the mineral materials. The mineral materials fall from the bottom plate through the opening and closing of the bottom plate; the mineral materials continue to fall through the obliquely arranged guide plate and fall onto the roller crushing assembly 401. 21 is coaxially arranged with the first driving disc 3032, the driving shaft drives the second driving disc 4021 to rotate, the second driving disc 4021 drives the connecting column 4022 to make a circular motion, the connecting column 4022 drives the connecting motion, since the connecting rod 4023 is rotatably connected with the sliding rod 4024 and the sliding rod 4024 is connected with the guide groove 4025, the guide rod 30344 makes an up-and-down reciprocating motion, the rack segment 40241 arranged on the guide rod 30344 also makes an up-and-down reciprocating motion, the rack segment 40241 meshes with the driven gear 4026, drives the driven gear 4026 to make a clockwise and counterclockwise reciprocating rotation of less than one circle, and the driven gear 4026 drives the two crushing rollers 4011 to make a clockwise and counterclockwise reciprocating motion. The two crushing rollers 4011 squeeze and crush the ore falling on them, and the crushed ore falls from the space between the two crushing rollers 4011; the ore after the secondary crushing mechanism 400 falls onto the vibrating screen 501, and the vibrating screen 501 works to screen the crushed ore. The ore that meets the requirements falls below the vibrating screen 501 and is discharged from the obliquely arranged discharge trough 503. The ore that does not meet the requirements remains on the vibrating screen 501 and falls from the vibrating screen 501 screen material discharge port onto the second conveyor belt 502 for output. In actual use, a conveyor belt for lifting ore can be set between the second conveyor belt 502 and the third conveyor belt, and the ore that does not meet the requirements is transported to the first conveyor belt 202 and enters the device again for crushing.

[0025] The present invention also provides an operating method of a multi-stage crushing device for bauxite clinker production, comprising the following steps: S1, sorting and crushing abnormal materials of bauxite ore, the bauxite ore enters the feeding mechanism 200, and the abnormal materials with large blocks are selected and crushed in the feeding mechanism 200; S2, primary crushing of the bauxite ore, the normal materials and the abnormal materials processed by the feeding mechanism 200 enter the crushing chamber 302 of the primary crushing mechanism 300 through the feeding channel 301 for crushing; S3, the bauxite ore is crushed by the feeding mechanism 200, and the normal materials and the abnormal materials processed by the feeding mechanism 200 enter the crushing chamber 302 of the primary crushing mechanism 300 through the feeding channel 301 for crushing; S4, the bauxite ore is crushed by the feeding mechanism 200, and the normal materials and the abnormal materials processed by the feeding mechanism 200 enter the crushing chamber 302 of the primary crushing mechanism 300 through the feeding channel 301 for crushing; S5, the bauxite ore is crushed by the feeding mechanism 200, and the normal materials and the abnormal materials processed by the feeding mechanism 200 enter the crushing chamber 302 of the primary crushing mechanism 300 through the feeding channel 301 for crushing; S6, the bauxite ore is crushed by the feeding mechanism 200, and the normal materials and the abnormal materials processed by the feeding mechanism 200 enter the crushing chamber 302 of the primary crushing mechanism 300 through the feeding channel 301 for crushing; S7, the bauxite ore is crushed by the feeding mechanism 200, and the normal materials and the abnormal materials processed by the feeding mechanism 200 enter the crushing chamber 302 of the primary crushing mechanism 300 through the feeding channel 301; S8, the bauxite ore is crushed by the feeding mechanism 200, and the normal The bauxite material is crushed for the second time. The material crushed by the primary crushing mechanism 300 continues to fall to the secondary crushing mechanism 400, and the roller crushing assembly 401 crushes the material for the second time; S4, the crushed bauxite material is screened, and the crushed bauxite material is screened by the vibrating screen 501; S5, the screened bauxite material is discharged, and the material on the vibrating screen 501 is sent out through the second conveyor belt 502, and is crushed again, and the material under the vibrating screen 501 is sent out through the discharge trough 503.

[0026] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-stage crushing device for bauxite clinker production, characterized in that: It comprises a mounting frame (100), a feeding mechanism (200), a primary crushing mechanism (300), a secondary crushing mechanism (400), and a screening and discharging mechanism (500), wherein the mounting frame (100) is used to support and install various mechanism components; The feeding mechanism (200) comprises a feeding hopper (201), a first conveyor belt (202), and an abnormal material separation and crushing assembly (203); the feeding hopper (201) is fixed on the mounting frame (100); a hopper cover (211) is detachably provided on the top of the feeding hopper (201); a feeding port (212) is provided on the left and right sides of the feeding hopper (201); and a discharging port is provided on the bottom of the feeding hopper (201); bauxite ore is input from the feeding port (212) by the first conveyor belt (202); the input bauxite ore passes through the abnormal material separation and crushing assembly (203) and enters the primary crushing mechanism (300) together with normal material from the discharging port; The primary crushing mechanism (300) comprises a feeding channel (301), a crushing chamber (302) and a first driving assembly (303); the upper end of the feeding channel (301) is connected to the discharge port of the feeding mechanism (200); the feeding channel (301) comprises an inner channel plate and an outer channel plate; the lower end of the feeding channel (301) is connected to the crushing chamber (302); the crushing chamber (302) comprises a fixed front plate (3021), a fixed rear plate (3022), a fixed outer plate (3023) and a slidable inner plate (3024); the front plate (3021) and the rear plate (3022) are symmetrically arranged, and the inner sides of the front plate (3021) and the rear plate (3022) are both provided with side plate sliding grooves (3025); the inner plate Side plate sliders matching with the side plate slide grooves (3025) are arranged on both sides of the outer plate (3023), the upper end of the outer plate (3023) is connected to the lower end of the outer channel plate, the upper end of the inner plate (3024) is connected to the lower end of the inner channel plate via a flexible wear-resistant rubber belt (3026), the lower end of the inner plate (3024) is connected to the side wall of the channel below it via a flexible wear-resistant rubber belt (3026), and matching sawtooth protrusions are arranged on the opposite sides of the outer plate (3023) and the inner plate (3024), the first driving component (303) is used to drive the inner plate (3024) to slide in the crushing chamber (302), and the outer plate (3023) and the inner plate (3024) cooperate to crush the mineral materials in the crushing chamber (302); The secondary crushing mechanism (400) comprises a double-roll crushing assembly (401) and a second driving assembly (402), wherein the second driving assembly (402) provides power to the double-roll crushing assembly (401) to perform secondary crushing on the mineral material after the primary crushing mechanism (300) has completed the operation; The screening and discharging mechanism (500) comprises a vibrating screen (501), a second conveyor belt (502) and a discharging trough (503); the vibrating screen (501) is arranged below the roller crushing assembly (401); the oversize material of the vibrating screen (501) is discharged by the second conveyor belt (502); and the undersize material of the vibrating screen (501) is discharged by the inclined discharging trough (503).

2. The multi-stage crushing device for bauxite clinker production according to claim 1 is characterized in that: The abnormal material separation and crushing assembly (203) includes inclined rods (2031), a crushing table (2032), a material baffle, mounting blocks (2033), hydraulic cylinders (2034), first inclined blocks (2035), first chutes (2036), first sliders (2037), second inclined blocks (2038), pressing blocks (2039), guide columns (20310), second chutes (20311), second sliders (20312), and first springs (20313). The inclined rods (2031) are inclined and arranged in parallel on both sides of the crushing table (2032). Material baffles are connected to the two outermost inclined rods (2031). One end of the inclined rod (2031) is connected to the inner side wall of the feed hopper (201), and the other end is connected to the side surface of the crushing table (2032) and is flush with the upper surface of the crushing table (2032). A plurality of inclined rods (2031) are provided. The mounting blocks (2033) are fixed above the crushing table (2032). The first inclined blocks (2035) can be horizontally slidably arranged on the mounting blocks (2033). The upper surface of the mounting blocks (2033) is provided with "丄”-shaped first chutes (2036). The bottom surface of the first inclined blocks (2035) is fixed with "丄”-shaped first sliders (2037) that cooperate with the first chutes (2036). The "丄”-shaped first chutes (2036) restrict the upward displacement of the first sliders (2037). The first inclined blocks (2035) are provided with first inclined surfaces (20351). One side of the first inclined blocks (2035) close to the front of the feed hopper (201) is connected to the output end of the hydraulic cylinder (2034) through a push rod (20314). The hydraulic cylinder (2034) is fixed on the installation frame (100). The mounting blocks (2033) are vertically provided with installation grooves. A second inclined block (2038) can be slidably arranged up and down in the installation grooves. The second inclined blocks (2038) are provided with second inclined surfaces (20381). The first inclined surfaces (20351) cooperate with the second inclined surfaces (20381). Second chutes (20311) are arranged on both sides of the installation grooves. Second sliders (20312) that cooperate with the second chutes (20311) are fixed on both sides of the second inclined blocks (2038). Guide columns (20310) are vertically fixed in the second chutes (20311). The guide columns (20310) pass through the second sliders (20312). The second sliders (20312) can slide along the guide columns (20310) in the second chutes (20311). First springs (20313) are sleeved on the guide columns (20310) below the second sliders (20312). The bottom of the second inclined blocks (2038) is fixedly connected with pressing blocks (2039). The pressing blocks (2039) can extend out of the mounting blocks (2033) from the bottom of the installation grooves of the mounting blocks (2033) and cooperate with the crushing table (2032) to complete the downward pressing and crushing of abnormal materials.

3. The multi-stage crushing device for bauxite clinker production according to claim 2 is characterized in that: The feeding mechanism (200) further comprises a material clearing assembly (204), wherein the material clearing assembly (204) comprises a fixed plate (2041), a second spring (2042), a sliding mounting block (2043), an inclined surface clamping block (2044), a third spring (2045), a bolt (2046), a material clearing plate (2047), an inclined surface top pulling block (2048), a connecting rod (2049), and a fixed inclined surface top block (20410), wherein the fixed plate (2041) is fixed to a side wall at the end of the mounting block (2033), and the sliding mounting block (2043) is slidably disposed in front of the fixed plate (2041). A second spring (2042) is connected between the fixing plate (2041) and the sliding mounting block (2043); a sliding mounting groove (20431) is vertically provided on the upper surface of the sliding mounting block (2043) and does not penetrate therethrough; the inclined surface block (2044) can be slidably arranged in the sliding mounting groove (20431); a bolt (2046) is screwed on the bottom surface of the inclined surface block (2044); a third spring (2045) is sleeved on a portion of the bolt (2046) located in the sliding mounting groove (20431); an end of the bolt (2046) away from the inclined surface block (2044) passes through the sliding mounting groove (20431); The sliding mounting groove (20431) is fixed with the sliding mounting block (2043); the inclined surface clamping block (2044) is provided with a third inclined surface (20441); the third inclined surface (20441) faces the side away from the fixed plate (2041); the cleaning plate (2047) is connected to the sliding mounting block (2043); the inclined surface top pull block (2048) is fixedly connected to the push-pull rod (20314) through a connecting rod (2049); the position of the inclined surface top pull block (2048) matches the position of the inclined surface clamping block (2044); the inclined surface top pull block (2048) is provided with a fourth inclined surface ( 20481), the fourth inclined surface (20481) cooperates with the third inclined surface (20441), the fixed inclined surface top block (20410) is fixed on the side of the front sliding mounting block (2043) of the mounting block (2033), the fixed inclined surface top block (20410) is provided with a fifth inclined surface (204101) that cooperates with the third inclined surface (20441), the fixed inclined surface top block (20410) is provided with a passing groove (204102) that allows the inclined surface top pull block (2048) to pass through, and the width of the third inclined surface (20441) is greater than the width of the fourth inclined surface (20481).

4. The multi-stage crushing device for bauxite clinker production according to claim 1 is characterized in that: The first driving assembly (303) comprises a driving motor (3031), a first driving disc (3032), a disc mounting seat (3033), a support plate, and a motion frame (3034); the driving motor (3031) is fixedly mounted on a mounting frame (100); an output end of the driving motor (3031) is connected to the first driving disc (3032) via a driving shaft; the first driving disc (3032) is rotatably mounted on the disc mounting seat (3033); the disc mounting seat (3033) is fixed on the support plate; the support plate is fixedly connected to the mounting frame (100); and an arc rack portion (30321) is provided on the outer circumference of the first driving disc (3032). The arc length corresponding to the arc rack portion (30321) is less than half the circumference of the first driving disc (3032); the motion frame (3034) is surrounded by a semicircular frame (30342) symmetrically arranged on the left and right sides and a linear rack frame (30341) symmetrically arranged on the top and bottom sides; the linear rack frame (30341) is provided with guide fixing blocks (30343) on the left and right sides; a guide rod (30344) is fixed between the two guide fixing blocks (30343) on the same side; guide slide grooves for the guide rod (30344) to slide are provided on the upper and lower sides of the disc mounting seat (3033); and the motion frame (3034) is connected to inner plates (3024) on the left and right sides.

5. The multi-stage crushing device for bauxite clinker production according to claim 4 is characterized in that: The second driving assembly (402) comprises a second driving disc (4021), a connecting column (4022), a connecting rod (4023), a sliding rod (4024), a guide groove (4025), and a driven gear (4026); the second driving disc (4021) is coaxially arranged with the first driving disc (3032); an end of a driving shaft for driving the first driving disc (3032) away from the driving motor (3031) is connected to the second driving disc (4021); a connecting column (4022) is rotatably arranged on an outer side surface of the second driving disc (4021); the connecting column One end of (4022) away from the second driving disc (4021) is rotatably connected to one end of the connecting rod (4023), and the other end of the connecting rod (4023) is rotatably connected to the upper end of the sliding rod (4024). The sliding rod (4024) can slide up and down in the guide groove (4025), and the guide groove (4025) is fixed on the mounting frame (100). The lower part of the sliding rod (4024) is provided with a rack section (40241) that does not interfere with the guide groove (4025), and driven gears (4026) that mesh with the rack section (40241) are provided on both sides of the rack section (40241).

6. The multi-stage crushing device for bauxite clinker production according to claim 5, characterized in that: The roller crushing assembly (401) comprises two symmetrically arranged crushing rollers (4011), a distance between the two crushing rollers (4011) being left through which qualified mineral materials can pass, protrusions for squeezing and crushing the mineral materials being evenly arranged on the roller surfaces of the crushing rollers (4011), roller shafts being arranged at both ends of the crushing rollers (4011), the roller shafts being rotatably connected to the mounting frame (100), and the roller shaft on one side close to the driven gear (4026) being connected to the driven gear (4026), and the driven gear (4026) being able to drive the roller shaft to rotate.

7. An operating method of a multi-stage crushing device for bauxite clinker production as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Sorting and crushing of abnormal materials of bauxite ore. The bauxite ore enters the feeding mechanism (200), and abnormal materials with large blocks are selected and crushed in the feeding mechanism (200); S2, primary crushing of bauxite ore, normal material and abnormal material processed by the feeding mechanism (200) enter the crushing chamber (302) of the primary crushing mechanism (300) through the discharge channel (301) for crushing; S3, secondary crushing of bauxite ore, the ore crushed by the primary crushing mechanism (300) continues to fall to the secondary crushing mechanism (400), and the roller crushing assembly (401) performs secondary crushing on the ore; S4, screening the crushed bauxite ore, screening the crushed bauxite ore through a vibrating screen (501); S5. The bauxite ore material after screening is discharged. The material on the vibrating screen (501) is sent out through the second conveyor belt (502) and is crushed again. The material under the vibrating screen (501) is sent out through the discharge trough (503).

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