An integrated ore crushing and grinding device

Abstract

The present invention discloses an integrated ore crushing and grinding device. The upper housing of the crushing mechanism is provided with two crushing rollers and a feeding port is provided above the two crushing rollers. The two crushing rollers are connected to the output shaft of a power source via a transmission mechanism I. The grinding mechanism has a grinding roller rotating in a grinding drum. A gap is provided between the outer wall of the grinding roller and the inner wall of the grinding drum. The grinding roller is connected to the output shaft of the power source via a transmission mechanism II. A discharge port II is provided below the grinding roller on the bottom surface of the grinding drum. The lower housing of the screening mechanism is provided with a screening frame below the discharge port II. The screening frame is connected to the output shaft of the power source via a transmission mechanism III. The lower housing is provided with a discharge port IV below the screening frame. The present invention integrates crushing, grinding, and screening into one, which can solve the problem in the prior art that large pieces of ore still remain after ore crushing and that the grinding effect is poor, resulting in low ore beneficiation efficiency. The present invention has the characteristics of compact structure, easy operation, low wear, good crushing and grinding effect, and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and in particular to an integrated ore crushing and grinding device which has the advantages of compact structure, easy operation, low loss, good crushing and grinding effect and high efficiency. Background Art

[0002] Crushing and grinding fully separate the useful minerals from the gangue in the ore, and are the first step in the development and utilization of mineral resources. They are responsible for providing the appropriate particle size of the selected materials for subsequent mineral processing operations. Since the appropriate ore particle size is the key to improving resource utilization, overly coarse ore particles do not fully separate the useful minerals from the gangue, resulting in low concentrate grade and recovery rate. On the other hand, overly fine ore particles contain many fine particles that are difficult to separate, making it difficult to effectively recover them using current mineral processing methods.

[0003] In the mineral processing industry, investments in crushing and grinding account for the largest portion of the entire beneficiation process, with grinding contributing significantly to overall operating costs. Therefore, the strategy of "increasing crushing and reducing grinding" has long been a key approach to reducing beneficiation costs and improving the efficiency of subsequent product separation. Appropriate crushing and grinding processes and equipment directly impact the technical and economic performance of mineral processing. Traditionally, ore development and utilization involves crushing, then grinding, and then, if necessary, screening before further extraction. Crushing, grinding, and screening are performed separately, resulting in complex and bulky machinery and high energy consumption. Furthermore, the ore must be transported between various pieces of equipment via conveyors, increasing losses, operating costs, and maintenance. Furthermore, this transport also creates noise and dust pollution. Furthermore, current ore crushing processes suffer from unevenness, resulting in large lumps of ore remaining after crushing, severely impacting subsequent grinding operations. This is a key factor hindering the implementation of the "increasing crushing and reducing grinding" strategy.

[0004] In the prior art, in order to solve the above-mentioned problem, a crushing roller is installed on the upper part of an integrated box to crush the ore. After the initial crushing, the ore falls onto the partition. Then, a horizontally arranged hydraulic cylinder drives the push plate so that the crushing teeth on it cooperate with the crushing teeth on the fixed plate, further squeezing and crushing the ore on the partition, and then falls onto the fixed screen at the bottom for screening and discharge. Although the integrated two-stage crushing can improve the crushing effect and screening can also prevent the adverse effects of large ore on subsequent grinding operations, the compression crushing operation is inefficient and energy-consuming. In addition, the two-stage crushing and screening can only solve the problem of large ore blocks remaining, and cannot effectively reduce the particle size of the ore. Therefore, a large amount of subsequent grinding operations are still required. In addition, a fixed crushing plate is fixed on one side of the box body, and a plurality of dynamic crushing plates with different spacings are provided on the other side of the box body for sliding from top to bottom. By driving the dynamic crushing plate to slide back and forth, the ore is gradually squeezed and crushed from top to bottom, and a screening mechanism is fixed on the dynamic crushing plate to achieve synchronous screening. In addition, a grinding plate is fixed at the bottom end of the dynamic crushing plate, and a screen hole is set on the box body below the grinding plate. The grinding plate moves back and forth under the drive of the dynamic crushing plate, so that the crushed ore falling from the upper part after screening is reciprocally ground and refined, and finally the refined ore that meets the specification requirements falls through the screen hole. The ore of the above-mentioned integrated device is squeezed and crushed step by step, and then screened, ground, and re-screened. It can effectively improve the uniformity of the ore and reduce the particle size of the ore, thereby reducing the workload of subsequent grinding. However, due to the low efficiency and high power consumption of reciprocating extrusion crushing, the large-sized ore that is not fully crushed in the upper part is easy to fall into the narrow extrusion gap in the lower part during the reciprocating process, which can easily cause the extrusion device to get stuck and form a production safety accident. In addition, a gravity coarse crushing device with free-fall motion is installed on the upper part of the shell. Under the combined action of the lifting electromagnet and pneumatic spring, the ore inside is hammered and coarsely crushed. Then, an extrusion and grinding secondary crushing device is installed in the middle of the shell. The coarse ore entering it is rotated, extruded and crushed by the motor to form secondary crushing. Then, a multi-stage ball mill and screen are installed at the bottom of the shell. The ore after secondary crushing is subjected to multi-stage ball milling to form ore powder or ore pulp that meets the requirements. Although the integrated structure reduces losses in the intermediate conveying link, and the combination of secondary crushing and multi-stage ball milling can effectively reduce the particle size after crushing and avoid safety accidents such as jamming, its intermittent gravity crushing efficiency is low. The separate power source not only increases the loss of energy conversion, but also complicates the overall structure, making maintenance and use more difficult. Summary of the Invention

[0005] The object of the present invention is to provide an integrated ore crushing and grinding device with compact structure, easy operation, low wear and tear, good crushing effect and high efficiency.

[0006] The present invention is realized as follows: comprising a crushing mechanism, a grinding mechanism, a screening mechanism,

[0007] The crushing mechanism includes an upper box body and a transmission mechanism I. Two crushing rollers are arranged in parallel in the upper box body. A feeding port is provided above the two crushing rollers in the upper box body. The two crushing rollers in the upper box body are connected to the output shaft of the power source through the transmission mechanism I to rotate.

[0008] The grinding mechanism includes a grinding cylinder vertically fixed to the lower end of the discharge port I of the upper box body, and a transmission mechanism II. A grinding roller is rotatably arranged vertically in the grinding cylinder. A grinding gap that narrows from top to bottom is provided between the outer wall of the grinding roller and the inner wall of the grinding cylinder. The grinding roller is connected to the output shaft of the power source through the transmission mechanism II for rotation. A discharge port II is provided on the bottom surface of the grinding cylinder below the grinding roller.

[0009] The screening mechanism includes a lower box body fixed at the lower end of the discharge port II of the grinding cylinder and a transmission mechanism III. A screening frame is provided in the lower box body below the discharge port II. The screening frame is connected to the output shaft of the power source through the transmission mechanism III for reciprocating movement. The lower box body is provided with a discharge port IV below the screening frame.

[0010] The beneficial effects of the present invention are:

[0011] 1. The present invention integrates crushing, grinding and screening into one, and can simultaneously realize the continuous operation of coarse crushing, grinding and screening of ore, greatly reducing the crushing and grinding process, reducing the types of equipment and reducing equipment power consumption. In particular, the roller crushing mechanism with simple structure and large processing capacity is used to coarsely crush the ore, and then the grinding roller of the grinding mechanism rotates and cooperates with the grinding drum to grind the coarsely crushed ore, and finally the screening frame that reciprocates in the screening mechanism is used to sort the ground ore. This not only solves the problems in the prior art that large pieces of ore still remain after the ore is crushed, and the grinding effect is poor, resulting in low ore beneficiation efficiency, but the continuous operation also makes the crushing and grinding efficiency higher, and the top-down integrated structure allows the ore to be fed by its own weight, which reduces transportation loss and energy consumption compared with the traditional split structure, and can significantly reduce noise and dust pollution.

[0012] 2. The grinding mechanism of the present invention cooperates with the rotating grinding roller and the grinding drum to perform the initial grinding of the coarsely crushed ore. The rotating grinding structure enables continuous grinding operations. Not only is the efficiency higher than that of the existing reciprocating extrusion grinding, but the rotary grinding also allows the ore entering it to be continuously squeezed, ground and crushed as the grinding gap gradually shrinks. Not only is the ore crushed more uniform, but the axial and circumferential forces on the grinding roller and the grinding drum are also more uniform, which can effectively improve the service life of the equipment. Moreover, the friction resistance of the rotating structure is smaller than that of the reciprocating sliding operation of the reciprocating extrusion type, so its power consumption is reduced. Moreover, since the grinding gap that narrows from top to bottom does not change during the grinding process, the problem of large-particle ore easily falling off and causing the device to get stuck in the reciprocating extrusion type can be avoided.

[0013] 3. The screening mechanism of the present invention uses a power source to reciprocate the screening frame through transmission mechanism III to achieve sorting of the ground ore. In particular, the slider-slideway sliding fit between the screening frame and the lower housing effectively improves the reliability of the screening mechanism.

[0014] 4. The present invention further provides a liftable grinding disc at the bottom of the grinding roller, and the bottom end of the grinding disc cooperates with the inner bottom surface of the grinding tube to form a grinding surface, so that after the ore after the initial grinding falls to the bottom of the grinding tube and accumulates to a certain amount, the grinding disc can be controlled to descend and rotate under the drive of the grinding roller to perform secondary grinding on the ore, thereby further improving the grinding effect and facilitating subsequent mineral processing; further, a liftable sealing block is provided at the bottom of the grinding tube, and a scraper is fixedly provided at the bottom of the grinding roller, so that the ore after the secondary grinding can fall smoothly into the screening mechanism, and the problem of easy blockage of the discharge channel in the existing grinding structure can be avoided.

[0015] 5. The present invention uses different transmission mechanisms to enable the coarse crushing-grinding-screening operations to be powered by the same power source or provided with separate power sources as needed, thereby not only improving the flexibility of use but also effectively simplifying the overall structural complexity, making maintenance and use easier, and the various mechanisms can automatically achieve synchronous operation.

[0016] Therefore, the present invention has the characteristics of compact structure, easy operation, low loss, good crushing effect and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 for Figure 1 Lower left bottom view;

[0019] Figure 3 for Figure 2 A enlarged view;

[0020] Figure 4 for Figure 1 Schematic diagram of longitudinal section structure;

[0021] Figure 5 for Figure 1 Schematic diagram of power transmission structure;

[0022] Figure 6 for Figure 2 Schematic diagram of the discharge control mechanism structure;

[0023] Figure 7 for Figure 6 Exploded diagram of the discharge control mechanism;

[0024] Figure 8 for Figure 2 Schematic diagram of the longitudinal section structure of the grinding mechanism;

[0025] Figure 9 for Figure 8 Schematic diagram of the structure of removing the grinding cylinder;

[0026] In the figure: 1-upper box, 2-grinding cylinder, 3-lower box, 4-limiting frame, 5-connecting rod, 6-turntable, 7-power source, 8-mounting plate, 9-drive shaft I, 10-drive shaft II, 11-drive belt, 12-pulley I, 13-spur gear I, 14-spur gear II, 15-bevel gear I, 16-spur gear III, 17-chute, 18-screening frame, 19-push rod, 20-crushing roller, 21-mounting frame, 22-conical protective cover, 23-slider, 24-pulley II , 25-sealing block, 26-electric telescopic rod Ⅰ, 27-U-type mounting seat, 28-bevel gear Ⅱ, 29-bevel gear Ⅲ, 30-mounting shaft, 31-guide rod, 32-electric telescopic rod Ⅱ, 33-scraper, 34-grinding disc, 35-bevel gear Ⅳ, 36-grinding roller, 37-feeding port, 38-discharge port Ⅰ, 39-discharge port Ⅱ, 40-discharge port Ⅳ, 41-cavity, 42-upper jaw tooth, 43-spur gear Ⅳ, 44-avoidance groove, 45-straight jaw tooth, 46-inclined surface. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figures 1 to 9 As shown, the present invention includes a crushing mechanism, a grinding mechanism, and a screening mechanism.

[0029] The crushing mechanism includes an upper box body 1 and a transmission mechanism I. Two crushing rollers 20 are arranged in parallel in the upper box body 1. A feeding port 37 is provided above the two crushing rollers 20 in the upper box body 1. The two crushing rollers 20 in the upper box body 1 are connected to the output shaft of the power source 7 through the transmission mechanism I for rotation.

[0030] The grinding mechanism includes a grinding drum 2 vertically fixed to the lower end of the discharge port I 38 of the upper box body 1, and a transmission mechanism II. A grinding roller 36 is rotatably arranged vertically in the grinding drum 2. A grinding gap that narrows from top to bottom is provided between the outer wall of the grinding roller 36 and the inner wall of the grinding drum 2. The grinding roller 36 is connected to the output shaft of the power source 7 through the transmission mechanism II for rotation. A discharge port II 39 is provided on the bottom surface of the grinding drum 2 below the grinding roller 36.

[0031] The screening mechanism includes a lower box body 3 fixed at the lower end of the discharge port II39 of the grinding cylinder 2, and a transmission mechanism III. A screening frame 18 is provided below the discharge port II39 in the lower box body 3. The screening frame 18 is connected to the output shaft of the power source 7 through the transmission mechanism III for reciprocating movement. The lower box body 3 is provided with a discharge port IV40 below the screening frame 18.

[0032] like Figure 4 、 8 As shown in Figure 9, a pressing mechanism is also provided at the bottom of the grinding roller 36, which includes a guide rod 31, an electric telescopic rod II 32, and a grinding disc 34. A cavity 41 is provided in the grinding roller 36, and the electric telescopic rod II 32 is vertically fixed in the cavity 41. The grinding disc 34 is coaxially arranged below the grinding roller 36. The guide rod 31 is vertically fixed to the upper end of the grinding disc 34 and slides through the grinding roller 36 and extends into the cavity 41. The extended end II of the electric telescopic rod II 32 penetrates the grinding roller 36 and is fixedly connected to the grinding disc 34. A number of upper jaw teeth 42 that can cooperate with the inner bottom surface of the grinding cylinder 2 are evenly distributed on the bottom surface of the grinding disc 34.

[0033] like Figure 4 、 6 As shown in Figure 7, a discharge control mechanism is also provided at the top of the lower box body 3, and the discharge control mechanism includes a sealing block 25, an electric telescopic rod I 26, and a U-shaped mounting seat 27. The two side legs of the U-shaped mounting seat 27 are vertically fixed to the bottom end of the grinding cylinder 2, and the two sides of the sealing block 25 are slidably set on the two side legs of the U-shaped mounting seat 27. The side of the sealing block 25 facing the grinding cylinder 2 is fixedly provided with a sealing protrusion that can be embedded in the discharge port II 39. The electric telescopic rod I 26 is fixedly set on the U-shaped mounting seat 27, and the extended end II of the electric telescopic rod I 26 passes through the U-shaped mounting seat 27 and is fixedly connected to the sealing block 25.

[0034] The inner bottom surface of the grinding cylinder 2 is a plane or an inverted cone or concave arc structure with a high outer circumference and a low inner circumference. The slope of the inverted cone structure of the inner bottom surface of the grinding cylinder 2 is 1 to 3%, and the inner bottom surface of the grinding cylinder 2 is evenly distributed with a number of lower jaw teeth.

[0035] like Figure 4 、 8 As shown in Figures 9 and 9, the outer wall of the grinding roller 36 and the inner wall of the grinding cylinder 2 are respectively provided with a plurality of straight jaw teeth 45 in the circumferential direction; the diameter of the grinding roller 36 gradually increases from top to bottom or increases step by step, or the diameter is consistent from top to bottom and an inclined surface 46 is provided on the upper part.

[0036] The circumscribed circle diameter of the discharge port II 39 is smaller than the diameter of the lower end surface of the grinding roller 36, and at least two scrapers 33 are evenly distributed on the lower end surface of the grinding roller 36; the grinding disc 34 is provided with an avoidance groove 44 that runs through the upper and lower parts and corresponds to the position of the scraper 33, and the scraper 33 on the lower end surface of the grinding roller 36 can pass through the avoidance groove 44 on the grinding disc 34 without obstacles.

[0037] like Figure 1 、 2 As shown in Figures 4 and 5, a plurality of crushing teeth are fixedly provided on the outer circumferential surface of the crushing roller 20, and the transmission mechanism I includes a spur gear I13 and a spur gear II14 respectively fixed on the core shaft extending from the two crushing rollers 20 to the outer side of the upper box body 1, and the spur gear I13 and the spur gear II14 are meshed with each other, and the spur gear I13 or the spur gear II14 is connected to the output shaft of the power source 7.

[0038] A pulley I12 is coaxially fixed on the spur gear I13 or the spur gear II14, and a transmission shaft II10 is rotatably provided on the outer wall of the grinding cylinder 2. A pulley II24 and a bevel gear I15 are coaxially fixed on the transmission shaft II10, and the pulley I12 is connected to the pulley II24 through a transmission belt 11. A transmission shaft I9 parallel to the axis of the grinding roller 36 is also provided outside the grinding cylinder 2, and a bevel gear IV35 is coaxially fixed on the top of the transmission shaft I9. The bevel gear IV35 is meshed with the bevel gear I15, and the transmission shaft I9 is connected to the output shaft of the power source 7.

[0039] like Figure 4 and 8As shown, a mounting frame 21 is fixedly provided horizontally on the upper part of the grinding cylinder 2, and a mounting shaft 30 is coaxially fixedly provided on the top of the grinding roller 36. The mounting shaft 30 is arranged horizontally and rotates through the mounting frame 21; the transmission mechanism II includes a transmission shaft II10, a bevel gear II28, and a bevel gear III29. The bevel gear III29 is coaxially fixed on the mounting shaft 30. The transmission shaft II10 is horizontally rotatable and passes through the side wall of the grinding cylinder 2. The bevel gear II28 is coaxially fixed on the transmission shaft II10 in the grinding cylinder 2 and meshes with the bevel gear III29. The transmission shaft II10 is also connected to the output shaft of the power source 7.

[0040] A conical protective cover 22 fixedly connected to the mounting frame 21 is provided above the grinding roller 36 in the grinding cylinder 2. The bottom diameter of the conical protective cover 22 is larger than the diameter of the upper end surface of the grinding roller 36 and smaller than the inner diameter of the grinding cylinder 2. The bevel gear II 28 and the bevel gear III 29 are arranged in the conical protective cover 22, and the transmission shaft II 10 passes through the conical protective cover 22 and the side wall of the grinding cylinder 2.

[0041] like Figure 1 、 2 As shown in , 4 and 5, the transmission shaft II 10 is coaxially fixed with a bevel gear I 15 outside the grinding cylinder 2. A transmission shaft I 9 parallel to the axis of the grinding roller 36 is also provided outside the grinding cylinder 2. A bevel gear IV 35 is coaxially fixed to the top of the transmission shaft I 9. The bevel gear IV 35 is meshed with the bevel gear I 15. The transmission shaft I 9 is connected to the output shaft of the power source 7.

[0042] like Figures 2 to 5 As shown, sliders 23 parallel to each other are fixedly provided on both sides of the screening frame 18, and chutes 17 parallel to each other are provided on both sides of the inner wall of the lower box body 3. The sliders 23 on both sides of the screening frame 18 are slidably provided in the chutes 17 of the inner wall of the lower box body 3; a connecting rod 5 parallel to the slider 23 is fixedly provided on one side of the screening frame 18 perpendicular to the slider 23, and the connecting rod 5 passes through the lower box body 3 and a limit frame 4 is fixedly provided on the end face thereof vertically. A transmission shaft I9 parallel to the axis of the grinding roller 36 is also provided outside the lower box body 3, and a turntable 6 is fixedly provided at the bottom end of the transmission shaft I9, and a push rod 19 is eccentrically provided on the lower end face of the turntable 6. The push rod 19 is movably inserted in the limit frame 4, and the transmission shaft I9 is connected to the output shaft of the power source 7.

[0043] The working principle or working process of the present invention:

[0044] like Figures 1 to 9As shown, when working, the motor (i.e., the power source 7) is started, the output shaft of the motor rotates to drive the spur gear IV43, the spur gear IV43 drives the meshing spur gear III16 to rotate, the rotation of the spur gear III16 causes the transmission shaft I9 fixed thereto to rotate, the transmission shaft I9 drives the bevel gear IV35 to rotate, the bevel gear IV35 drives the meshing bevel gear I15 to rotate, the bevel gear I15 drives the transmission shaft II10 fixed thereto to rotate, the rotating transmission shaft II10 drives the pulley II24 fixed thereon, the pulley II24 drives the pulley I12 to rotate via the transmission belt 11, the pulley I12 drives the connected spur gear I13 to rotate, the spur gear I13 drives the meshing spur gear II14 to rotate, thereby causing the two crushing rollers 20 to rotate in opposite directions; ore blocks are fed from the feeding port 37 at the top of the upper housing 1, and the ore blocks fall between the crushing rollers 20 under their own weight. The rotating crushing rollers 20, under the interaction of the crushing teeth thereon, crush the ore blocks that enter between them, thereby completing the coarse crushing;

[0045] The coarsely crushed ore falls into the grinding cylinder 2 under the action of its own weight, and falls into the grinding gap under the guidance of the conical protective cover 22; the transmission shaft II 10 rotates under the drive of the motor to rotate the bevel gear II 28 fixed on it, and the bevel gear II 28 drives the meshing bevel gear III 29 to rotate, and the bevel gear III 29 then drives the mounting shaft 30 to which it is fixed to rotate, so that the mounting shaft 30 drives the grinding roller 36 to rotate, so that the ore falling into the grinding gap is continuously squeezed, ground and crushed and falls to the bottom of the grinding cylinder 2. When the ore at the bottom of the grinding cylinder 2 accumulates to a certain amount, the electric telescopic rod II 32 is controlled to extend to drive the grinding plate 34 to descend. After the grinding plate 34 descends, the rotating grinding roller 36 drives the grinding plate 34 to rotate under the joint action of the electric telescopic rod II 32 and the guide rod 31. The grinding plate 34 performs secondary grinding on the ore through the upper jaw teeth 42 on the bottom surface that cooperates with the inner bottom surface of the grinding cylinder 2, thereby improving the grinding effect. After the grinding is completed, the electric telescopic rod II 32 is controlled to retract. The grinding disc 34 is driven to rise through the scraper 33, and then the electric telescopic rod I 26 is controlled to contract to drive the sealing block 25 to descend, so that the sealing block 25 is removed from the discharge port II 39 at the bottom of the grinding cylinder 2. Subsequently, the rotating grinding roller 36 drives the scraper 33 fixed at the bottom end to rotate, scraping the secondary ground ore on the inner bottom surface of the grinding cylinder 2 to the discharge port II 39 for discharge. After completion, the electric telescopic rod I 26 is controlled to extend, and the sealing block 25 is lifted and embedded in the discharge port II 39 to complete the secondary grinding.

[0046] The secondary ground ore discharged from the discharge port II 39 falls into the screening frame 18. At this time, the rotating transmission shaft I9 drives the turntable 6 fixed thereon to rotate, and the turntable 6 drives the eccentrically fixed push rod 19 thereon to make a circular motion in the limit frame 4, so that the limit frame 4 moves back and forth. The limit frame 4 drives the screening frame 18 to move back and forth through the two connecting rods 5 fixed thereon, and screens the secondary ground ore on the screening frame 18 to complete the ore crushing operation.

[0047] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An integrated ore crushing and grinding device, characterized in that Including crushing mechanism, grinding mechanism, screening mechanism, The crushing mechanism comprises an upper box (1) and a transmission mechanism I. Two crushing rollers (20) are arranged in parallel in the upper box (1). A feeding port (37) is provided above the two crushing rollers (20) in the upper box (1). The two crushing rollers (20) in the upper box (1) are connected to the output shaft of the power source (7) through the transmission mechanism I for rotation. The grinding mechanism includes a grinding cylinder (2) vertically fixed to the lower end of the discharge port I (38) of the upper box (1), and a transmission mechanism II. A grinding roller (36) is rotatably arranged vertically in the grinding cylinder (2). A grinding gap narrowing from top to bottom is provided between the outer wall of the grinding roller (36) and the inner wall of the grinding cylinder (2). The grinding roller (36) is connected to the output shaft of the power source (7) through the transmission mechanism II for rotation. A discharge port II (39) is provided on the bottom surface of the grinding cylinder (2) below the grinding roller (36). The screening mechanism comprises a lower box body (3) fixed at the lower end of the discharge port II (39) of the grinding cylinder (2), and a transmission mechanism III. A screening frame (18) is provided in the lower box body (3) below the discharge port II (39). The screening frame (18) is connected to the output shaft of the power source (7) through the transmission mechanism III for reciprocating movement. The lower box body (3) is provided with a discharge port IV (40) below the screening frame (18). A pressing mechanism is also provided at the bottom of the grinding roller (36), and the pressing mechanism includes a guide rod (31), an electric telescopic rod II (32), and a grinding disc (34). A cavity (41) is provided in the grinding roller (36), and the electric telescopic rod II (32) is vertically fixed in the cavity (41). The grinding disc (34) is coaxially arranged below the grinding roller (36). The guide rod (31) is vertically fixed to the upper end of the grinding disc (34) and slides through the grinding roller (36) and extends into the cavity (41). The extended end II of the electric telescopic rod II (32) penetrates the grinding roller (36) and is fixedly connected to the grinding disc (34). A plurality of upper jaw teeth (42) that can cooperate with the inner bottom surface of the grinding cylinder (2) are uniformly distributed on the bottom surface of the grinding disc (34); A discharge control mechanism is also provided at the top of the lower box (3), and the discharge control mechanism includes a sealing block (25), an electric telescopic rod I (26), and a U-shaped mounting seat (27). The two side legs of the U-shaped mounting seat (27) are vertically fixed to the bottom end of the grinding cylinder (2), and the two sides of the sealing block (25) are slidably provided on the two side legs of the U-shaped mounting seat (27). A sealing protrusion that can be embedded in the discharge port II (39) is fixedly provided on the side of the sealing block (25) facing the grinding cylinder (2). The electric telescopic rod I (26) is fixedly provided on the U-shaped mounting seat (27), and the extended end II of the electric telescopic rod I (26) passes through the U-shaped mounting seat (27) and is fixedly connected to the sealing block (25); The circumscribed circle diameter of the discharge port II (39) is smaller than the diameter of the lower end surface of the grinding roller (36), and at least two scrapers (33) are evenly distributed on the lower end surface of the grinding roller (36); the grinding disc (34) is provided with an avoidance groove (44) running through the upper and lower parts and corresponding to the position of the scraper (33), and the scraper (33) on the lower end surface of the grinding roller (36) can pass through the avoidance groove (44) on the grinding disc (34) without hindrance.

2. The integrated ore crushing and grinding device according to claim 1 is characterized in that A plurality of crushing teeth are fixedly provided on the outer circumferential surface of the crushing roller (20), and the transmission mechanism I comprises a spur gear I (13) and a spur gear II (14) respectively fixedly provided on the core shaft extending from the two crushing rollers (20) to the outer side of the upper box body (1), the spur gear I (13) and the spur gear II (14) are meshed with each other, and the spur gear I (13) or the spur gear II (14) is connected to the output shaft of the power source (7).

3. The integrated ore crushing and grinding device according to claim 2 is characterized in that A pulley I (12) is coaxially fixed on the spur gear I (13) or the spur gear II (14), a transmission shaft II (10) is rotatably provided on the outer wall of the grinding cylinder (2), a pulley II (24) and a bevel gear I (15) are coaxially fixed on the transmission shaft II (10), the pulley I (12) is connected to the pulley II (24) through a transmission belt (11), a transmission shaft I (9) parallel to the axis of the grinding roller (36) is further provided outside the grinding cylinder (2), a bevel gear IV (35) is coaxially fixed on the top end of the transmission shaft I (9), the bevel gear IV (35) is meshed with the bevel gear I (15), and the transmission shaft I (9) is connected to the output shaft of the power source (7).

4. The integrated ore crushing and grinding device according to claim 1 is characterized in that A mounting frame (21) is fixedly arranged horizontally on the upper part of the grinding cylinder (2), and a mounting shaft (30) is coaxially fixedly arranged on the top of the grinding roller (36), and the mounting shaft (30) is rotatably passed through the mounting frame (21); the transmission mechanism II comprises a transmission shaft II (10), a bevel gear II (28), and a bevel gear III (29), wherein the bevel gear III (29) is coaxially fixed on the mounting shaft (30), the transmission shaft II (10) is arranged horizontally and rotatably passed through the side wall of the grinding cylinder (2), the bevel gear II (28) is coaxially fixed on the transmission shaft II (10) in the grinding cylinder (2) and meshes with the bevel gear III (29), and the transmission shaft II (10) is also connected to the output shaft of the power source (7).

5. The integrated ore crushing and grinding device according to claim 4 is characterized in that A conical protective cover (22) fixedly connected to the mounting frame (21) is provided above the grinding roller (36) in the grinding cylinder (2). The bottom diameter of the conical protective cover (22) is larger than the diameter of the upper end surface of the grinding roller (36) and smaller than the inner diameter of the grinding cylinder (2). The bevel gear II (28) and the bevel gear III (29) are provided in the conical protective cover (22). The transmission shaft II (10) passes through the conical protective cover (22) and the side wall of the grinding cylinder (2).

6. The integrated ore crushing and grinding device according to claim 4, characterized in that The transmission shaft II (10) is coaxially fixed with a bevel gear I (15) outside the grinding cylinder (2). A transmission shaft I (9) parallel to the axis of the grinding roller (36) is also provided outside the grinding cylinder (2). A bevel gear IV (35) is coaxially fixed to the top end of the transmission shaft I (9). The bevel gear IV (35) is meshed with the bevel gear I (15). The transmission shaft I (9) is connected to the output shaft of the power source (7).

7. The integrated ore crushing and grinding device according to claim 1, characterized in that The two sides of the screening frame (18) are respectively fixed with mutually parallel sliders (23), and the two sides of the inner wall of the lower box body (3) are respectively provided with mutually parallel slide grooves (17), and the sliders (23) on both sides of the screening frame (18) are slidably arranged in the slide grooves (17) of the inner wall of the lower box body (3); the screening frame (18) is fixed with a connecting rod (5) parallel to the slider (23) on one side perpendicular to the slider (23), and the connecting rod (5) passes through the lower box body (3) and is fixedly provided with a limit frame (4) at the end face thereof. A transmission shaft I (9) parallel to the axis of the grinding roller (36) is also provided outside the lower box body (3), and a turntable (6) is fixedly provided at the bottom end of the transmission shaft I (9), and a push rod (19) is eccentrically provided on the lower end face of the turntable (6), and the push rod (19) is movably inserted into the limit frame (4), and the transmission shaft I (9) is connected to the output shaft of the power source (7).

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