Ore desliming preliminary screening device

Abstract

The utility model discloses an ore desliming and primary screening device which comprises four supporting rollers. The cleaning barrel is horizontally arranged on the four supporting rollers; the driving mechanism is rotationally connected with at least one supporting roller; the feeding sealing plate is arranged at the front end of the cleaning barrel, and a feeding hole is formed in the middle of the feeding sealing plate; the discharging sealing plate is arranged at the rear end of the cleaning barrel, and a discharging hole is formed in the middle of the discharging sealing plate; the material rolling net rack is arranged in the cleaning barrel; the feeding assembly is arranged at the front end of the cleaning barrel, and the tail end of the feeding assembly penetrates through the feeding hole and is located in the material rolling net frame; the spiral blade is arranged at the rear end of the material rolling net rack; the discharged material grading and screening assembly is arranged at the rear end of the cleaning barrel; the head end of the transfer unit is communicated with the discharging grading screening assembly, and the tail end of the transfer unit is communicated with the feeding assembly. According to the ore desliming device, part of ore with the relatively appropriate size after desliming can be added into the cleaning barrel again, more impact is provided for desliming of the ore with the large diameter, and the desliming efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of ore mining equipment, in particular to an ore desludging primary screening device. Background Art

[0002] During the mineral development process, it is necessary to clean the muddy ore on the mine to remove as much mud as possible from the surface of the ore. The most commonly used ore desludging equipment is the mine washer, which has a multi-layer tubular structure. The ore is placed in the mine washer, and then water is added. Finally, the inner layer or the entire washer is controlled to rotate, causing the ore to roll in the mine washer, thereby separating the mud from the ore surface.

[0003] The ore from some mines is highly uniform and has a larger diameter, meaning it contains fewer fine ores and is covered with a thicker layer of mud. When this type of ore is placed in a mine washer, because it contains fewer fine ores, the area of contact between the ores during tumbling in the washer is smaller. Therefore, it takes a long time to separate the mud from the surface by relying on the friction between the ores themselves, which seriously affects the desludging efficiency. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide an ore desludging primary screening device, which can add part of the ore with a relatively suitable size after desludging into the cleaning barrel again, provide more impact for the desludging of ore with a larger diameter, and improve the desludging efficiency.

[0005] The purpose of this utility model is achieved through such technical solution:

[0006] Ore desludging and primary screening device, including:

[0007] Four support rollers, distributed in a rectangular shape;

[0008] The cleaning bucket is cylindrical and placed flat on four support rollers;

[0009] a drive mechanism rotatably connected to at least one support roller, such that rotation of the support roller drives the cleaning bucket to rotate along its axis;

[0010] The feed sealing plate is arranged at the front end of the cleaning barrel and has a feed hole in the middle;

[0011] The discharge sealing plate is arranged at the rear end of the cleaning barrel and has a discharge hole in the middle; the diameter of the discharge hole is larger than the feed hole;

[0012] The rolling material grid is arranged in the cleaning barrel, and its two ends are respectively fixed to the feed sealing plate and the discharge sealing plate; the rolling material grid is provided with leakage holes for mud and water to pass through;

[0013] The feeding assembly is arranged at the front end of the cleaning barrel, and the rear end passes through the feeding hole and is located in the rolling grid;

[0014] The spiral blade is set at the rear end of the rolling grid. When the rolling grid rotates, it forces the ore box discharge hole in the rolling grid to move;

[0015] The discharge grading and screening component is installed at the rear end of the cleaning barrel, with its head end located just below the tail end of the roller grid. It receives the ore discharged from the roller grid and outputs the cleaned ore according to size classification.

[0016] The transfer unit has a head end connected to the discharge grading and screening component and a tail end connected to the feed component, and places the ore within a certain size range screened in the discharge grading and screening component back into the rolling grid.

[0017] Furthermore, the support roller is tapered into a conical gear; the cleaning barrel is provided with a conical toothed belt corresponding to the support roller; the four support rollers are divided into two groups along the axis of the cleaning barrel; the cone angles of the two groups of support rollers are facing each other or facing each other.

[0018] Furthermore, the rolling grid includes a feed pipe, a cleaning pipe, and a discharge pipe in sequence along the axial direction of the cleaning barrel from the front end to the rear end of the cleaning barrel; the front end of the feed pipe is fixedly connected to the inner side surface of the feed sealing plate; the spiral blades are arranged on the inner wall of the discharge pipe; the rear end of the discharge pipe is fixedly connected to the discharge sealing plate; the feed pipe is funnel-shaped, and the front end diameter is smaller than the rear end; the cleaning pipe is a circular tube; the discharge pipe is funnel-shaped, and the front end diameter is larger than the rear end.

[0019] Furthermore, at least three supporting rollers are provided in the cleaning barrel to support the rolling grid in the cleaning pipe; the inner walls of the feed pipe and the cleaning pipe are provided with teeth; the height of the spiral blade does not exceed one-fifth of the diameter of the end of the discharge pipe.

[0020] Furthermore, at least three support rods are provided on the outer surface of the discharge pipe, and the support rods are evenly distributed in a circular array around the axis of the discharge pipe, with one end fixed to the outer side surface of the discharge pipe and the other end fixed to the inner wall of the discharge hole.

[0021] Furthermore, the discharge grading and screening component includes:

[0022] The coarse material receiving trough is tiltedly arranged at the rear end of the cleaning barrel through a vibrating frame, with the head end located just below the tail end of the rolling material grid; a coarse hole is provided at the bottom of the coarse material receiving trough;

[0023] The medium material receiving trough is tilted and arranged directly below the coarse material receiving trough through a vibrating frame to receive the ore falling from the coarse holes of the coarse material receiving trough; the bottom of the medium material receiving trough is provided with medium material; the discharge port of the medium material receiving trough is connected to the head end of the transfer unit;

[0024] The fine material receiving trough is tilted and arranged directly below the medium material receiving trough through a vibrating frame to receive the ore falling from the middle hole of the medium material receiving trough.

[0025] Furthermore, the transfer unit includes:

[0026] The low-level horizontal conveyor belt has its head end located just below the discharge port of the intermediate material receiving trough;

[0027] The lifting conveyor belt has its lower end located just below the tail end of the low level conveyor belt;

[0028] The head end of the high-level horizontal conveyor belt is located directly below the upper end of the lifting conveyor belt, and the tail end is located directly above the feed assembly.

[0029] Furthermore, the low-level horizontal conveyor belt, the lifting conveyor belt, and the high-level horizontal conveyor belt are all conveyor belt structures with side rails; the side rails on both sides of the middle of the lifting conveyor belt are provided with notches; and a material receiving box is provided directly below the notch of the side rails in the middle of the lifting conveyor belt.

[0030] Furthermore, a plurality of groups of V-shaped rollers are provided in the middle of the lifting conveyor belt, with the tips facing upwards; the conveying surface in the middle of the lifting conveyor belt is formed into a ridge shape; and the material receiving box is provided at an angle.

[0031] Furthermore, the cleaning barrel is provided with a tubular water injection pipe, which is sheathed outside the rolling grid; the two ends of the water injection pipe are respectively fixed to the feed sealing plate and the discharge sealing plate; the water injection pipe is provided with a plurality of water outlet holes obliquely pointing to the rear end of the cleaning barrel; the inner wall of the cleaning barrel is frustum-shaped, and the inner diameter of the front end is smaller than the inner diameter of the rear end; the discharge sealing plate is provided with at least one drainage port in the area between the water injection pipe and the inner wall of the cleaning barrel;

[0032] The feed sealing plate is a liquid rotary joint with an external inlet and a side outlet; the liquid outlet of the feed sealing plate faces the area between the water injection pipe and the inner wall of the cleaning barrel.

[0033] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0034] A spiral blade is set inside the conventional cleaning barrel to quickly output the desludging ore, realizing continuous desludging production; the desludging ore is graded and screened, and the ore of suitable size is selected and mixed with the undesludging ore again through the rotating unit to speed up the desludging efficiency.

[0035] Other advantages, objectives and features of the present invention will be described in part in the following description and will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings of the present invention are as follows:

[0037] Figure 1 This is a schematic diagram of the top view of the ore desliming and primary screening device in this embodiment.

[0038] Figure 2 for Figure 1 Schematic diagram of the structure at the AA section.

[0039] Figure 3 for Figure 1 Schematic diagram of the structure of the middle BB section.

[0040] Figure 4 for Figure 3 Enlarged structural diagram at point C in the middle.

[0041] Figure 5 for Figure 3 Enlarged structural diagram at point D in the middle.

[0042] In the figure: 1. Support roller; 2. Cleaning barrel; 21. Conical toothed belt; 3. Driving mechanism; 4. Feed sealing plate; 41. Feed hole; 5. Discharge sealing plate 5; 51. Discharge hole; 52. Drain outlet; 61. Feed pipe; 62. Cleaning pipe; 63. Discharge pipe; 64. Support roller; 65. Support rod; 66. Spiral blade; 7. Feed assembly; 81. Vibrating frame; 82. Coarse material receiving trough; 83. Medium material receiving trough; 84. Fine material receiving trough; 91. Low-level horizontal conveyor belt; 92. Lifting conveyor belt; 93. High-level horizontal conveyor belt; 94. Side railing; 95. Notch; 96. Material receiving box; 97. V-shaped roller; 10. Water injection pipe; 101. Water outlet. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] Example:

[0045] like Figures 1 to 5 As shown, the ore desludging and primary screening device includes:

[0046] Four support rollers 1, distributed in a rectangular shape;

[0047] The cleaning barrel 2 is cylindrical and placed flat on four supporting rollers 1;

[0048] A driving mechanism 3 is rotatably connected to at least one supporting roller 1, so that the rotation of the supporting roller 1 drives the cleaning bucket 2 to rotate along its axis;

[0049] The feed sealing plate 4 is arranged at the front end of the cleaning barrel 2 and has a feed hole 41 in the middle;

[0050] The discharge sealing plate 5 is arranged at the rear end of the cleaning barrel 2 and has a discharge hole 51 in the middle; the diameter of the discharge hole 51 is larger than the feed hole 41;

[0051] The material rolling grid is arranged in the cleaning barrel 2, and its two ends are respectively fixed to the feed sealing plate 4 and the discharge sealing plate 5; the material rolling grid is provided with a leakage hole (not shown in the figure) for muddy water to pass through;

[0052] The feeding assembly 7 is arranged at the front end of the cleaning barrel 2, and the rear end passes through the feeding hole 41 and is located in the rolling grid;

[0053] The spiral blade 66 is provided at the rear end of the rolling grid. When the rolling grid rotates, the ore box discharge hole 51 in the rolling grid is forced to move.

[0054] The discharge grading and screening component is arranged at the rear end of the cleaning barrel 2, with its head end located just below the tail end of the roller grid. It receives the ore discharged from the roller grid and outputs the cleaned ore according to size classification.

[0055] The transfer unit has a head end connected to the discharge grading and screening component and a tail end connected to the feed component 7, and places the ores within a certain size range screened in the discharge grading and screening component back into the rolling grid.

[0056] A spiral blade 66 is provided inside the conventional cleaning barrel 2 to quickly output the desludging ore, thereby realizing continuous desludging production; the desludging ore is graded and screened, and the ore of suitable size is selected and mixed with the undesludging ore again through the rotating unit to accelerate the desludging efficiency.

[0057] In this embodiment, the support roller 1 is tapered into a bevel gear; the cleaning barrel 2 is provided with a conical toothed belt 21 corresponding to the support roller 1; the four support rollers 1 are divided into two groups along the axis of the cleaning barrel 2; the cone angles of the two groups of support rollers 1 are facing each other or facing each other.

[0058] The gear transmission is more stable, and the above-mentioned conical structure design can keep the cleaning barrel stable during the rotation process, and will not appear the situation of left and right displacement along its axis.

[0059] In this embodiment, the rolling grid includes an inlet pipe 61, a cleaning pipe 62, and an outlet pipe 63 in sequence along the axial direction of the cleaning barrel 2 from the front end to the rear end of the cleaning barrel 2; the front end of the inlet pipe 61 is fixedly connected to the inner side surface of the feed sealing plate 4; the spiral blade 66 is arranged on the inner wall of the outlet pipe 63; the rear end of the outlet pipe 63 is fixedly connected to the outlet sealing plate 5; the inlet pipe 61 is funnel-shaped, and the front end diameter is smaller than the rear end; the cleaning pipe 62 is a circular tube; the outlet pipe 63 is funnel-shaped, and the front end diameter is larger than the rear end.

[0060] The feed pipe 61 is designed so that the incoming ore moves to the middle of the lower cleaning barrel 2 under the action of gravity to achieve feeding; the cleaning pipe is horizontal, so that the ore can stay here for a long time and be fully desludged, and finally be discharged under the action of the spiral blades 66 of the discharge pipe 63, forming a complete assembly line.

[0061] In this embodiment, at least three supporting rollers 64 are provided in the cleaning barrel 2 to support the roller grid in the cleaning pipe 62; the inner walls of the feed pipe 61 and the cleaning pipe 62 are provided with teeth (not shown in the figure); the height of the spiral blade 66 does not exceed one-fifth of the diameter of the end of the discharge pipe 63.

[0062] The teeth and protrusions function in the same way as the baffles in a drum washing machine, preventing the ore from sliding relative to the roller grid, thus preventing the ore from rolling and colliding within the grid. Support rollers 64 are provided to prevent the center of the grid from deforming due to the weight of the ore and the impact of the ore falling over time.

[0063] In this embodiment, at least three support rods 65 are provided on the outer surface of the discharge pipe 63. The support rods 65 are evenly distributed in a circular array around the axis of the discharge pipe 63, one end of which is fixedly connected to the outer side surface of the discharge pipe 63, and the other end is fixedly connected to the inner wall of the discharge hole 51.

[0064] The support rod 65 allows the end of the discharge pipe 63 to extend out of the cleaning bucket, making it convenient for the cleaned ore to fall smoothly into the discharge grading and screening assembly. At the same time, the support rod 65 will not block the overflow of mud and water in the cleaning bucket.

[0065] In this embodiment, the discharge grading and screening component includes:

[0066] The coarse material receiving trough 82 is tiltedly arranged at the rear end of the cleaning barrel 2 through the vibrating frame 81, with the head end located just below the tail end of the rolling mesh frame; the bottom of the coarse material receiving trough 82 is provided with a coarse hole;

[0067] The medium material receiving trough 83 is tilted and arranged directly below the coarse material receiving trough 82 through the vibrating frame 81 to receive the ore falling from the coarse holes of the coarse material receiving trough 82; the bottom of the medium material receiving trough 83 is provided with medium material; the discharge port of the medium material receiving trough 83 is connected to the head end of the transfer unit;

[0068] The fine material receiving trough 84 is tiltedly arranged directly below the medium material receiving trough 83 through the vibration frame 81 to receive the ore falling from the middle hole of the medium material receiving trough 83.

[0069] The vibrating frame 81 adopts a conventional frame structure with springs and eccentric wheels; the coarse material receiving trough 82, the medium material receiving trough 83 and the fine material receiving trough 84 classify the desludged ore according to diameter, and select the ore with appropriate particle diameter for reuse through the transfer unit.

[0070] In this embodiment, the transfer unit includes:

[0071] The head end of the low-level horizontal conveyor belt 91 is located just below the discharge port of the intermediate material receiving trough 83;

[0072] The lower end of the lifting conveyor belt 92 is located directly below the tail end of the low-level horizontal conveyor belt 91;

[0073] The head end of the high-level horizontal conveyor belt 93 is located just below the upper end of the lifting conveyor belt 92 , and the tail end is located just above the feeding assembly 7 .

[0074] The conveyor belt adopts the belt conveyor belt commonly used in the mining industry.

[0075] In this embodiment, the low-level horizontal conveyor belt 91, the lifting conveyor belt 92, and the high-level horizontal conveyor belt 93 are all conveyor belt structures with side fences 94; the side fences 94 on both sides of the middle of the lifting conveyor belt 92 are provided with notches 95; and a material receiving box 96 is provided directly below the notch 95 of the side fence 94 in the middle of the lifting conveyor belt 92.

[0076] The notch 95 allows the ore being screened and intended for reuse, if it has fewer sharp corners, to roll due to gravity on the lifting conveyor belt 92 and eventually fall through the notch 95 into the receiving box 96, thereby achieving the goal of screening out ore with sharp corners. When the ore with sharp corners is mixed with the ore with mud for desludging, the impact force on the ore is more concentrated, thereby achieving the goal of faster desludging.

[0077] In this embodiment, a plurality of groups of V-shaped rollers 97 are provided in the middle of the lifting conveyor belt 92, with the tips facing upwards; the conveying surface in the middle of the lifting conveyor belt 92 is formed into a ridge shape; and the receiving box 96 is provided at an angle.

[0078] The V-shaped roller 97 forms a ridge on the surface of the conveyor belt, and the ridge height is generally controlled within 3 cm to prevent too much ore from falling into the receiving box 96 from the gap 95. The V-shaped roller 97 with the tip upward is a conventional roller on the lower surface of the concave conveyor belt that is inverted.

[0079] In this embodiment, a tubular water injection pipe 10 is further provided in the washing barrel 2 and is sheathed outside the rolling grid; the two ends of the water injection pipe 10 are respectively fixed to the feed sealing plate 4 and the discharge sealing plate 5; the water injection pipe 10 is provided with a plurality of water outlet holes 101 obliquely pointing to the rear end of the washing barrel 2; the inner wall of the washing barrel 2 is frustum-shaped, and the inner diameter of the front end is smaller than the inner diameter of the rear end; the discharge sealing plate 5 is provided with at least one drain port 52 in the area between the water injection pipe 10 and the inner wall of the washing barrel 2;

[0080] The feed sealing plate 4 is a liquid rotary joint with an external inlet and a side outlet; the liquid outlet of the feed sealing plate 4 faces the area between the water injection pipe 10 and the inner wall of the cleaning barrel 2.

[0081] Water can be injected into the cleaning barrel 2 through the liquid rotary joint without the need for a separate water filling pipe. At the same time, the water entering is between the water filling pipe 10 and the inner wall of the cleaning barrel, so that the sediment settled by gravity can be impacted and discharged from the drain port 52 along the inner wall of the cleaning barrel, reducing sediment accumulation and ensuring desilting efficiency.

[0082] The ore desliming and primary screening device of this embodiment is used as follows: the ore to be deslimed is placed into the roller grid through the chute of the feed component 7, and the driving mechanism 3 (reduction motor or hydraulic motor) is started, and water is injected into the cleaning barrel 2 through the feed sealing plate 4.

[0083] As the roller grid rotates, the ore is turned inward and finally desludged. It is discharged by the spiral blade 66 and falls into the coarse material receiving trough 82. The smaller diameter ore falls into the medium material receiving trough 83. The smaller diameter ore falls from the medium material receiving trough 83 into the fine material receiving trough 84. The ore obtained from the medium material receiving trough 83 falls into the low horizontal conveyor belt 91 and then enters the lifting conveyor belt 92. At this time, the relatively rounded ore rolls under the action of gravity and falls into the receiving box 96 through the gap 95. The ore with irregular surface and edges enters the high horizontal conveyor belt 93 and finally mixes with the new desludged ore and enters the cleaning barrel 2.

[0084] During the cleaning process, a large amount of water enters the cleaning barrel 2 and overflows from the discharge hole 51. The water containing more mud and sand is discharged through the drainage hole every time it reaches the middle and lower position as the discharge plate rotates. In this way, the mud and sand content in the cleaning barrel is kept at a low level, ensuring the continuous production of the equipment.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. Ore desliming and primary screening device, characterized in that: include: Four support rollers, distributed in a rectangular shape; The cleaning bucket is cylindrical and placed flat on four support rollers; a drive mechanism rotatably connected to at least one support roller, so that rotation of the support roller drives the cleaning bucket to rotate along its axis; The feed sealing plate is arranged at the front end of the cleaning barrel and has a feed hole in the middle; The discharge sealing plate is arranged at the rear end of the cleaning barrel and has a discharge hole in the middle; the diameter of the discharge hole is larger than the feed hole; The rolling material grid is arranged in the cleaning barrel, and its two ends are respectively fixed to the feed sealing plate and the discharge sealing plate; the rolling material grid is provided with leakage holes for mud and water to pass through; The feeding assembly is arranged at the front end of the cleaning barrel, and the rear end passes through the feeding hole and is located in the rolling grid; The spiral blade is set at the rear end of the rolling grid. When the rolling grid rotates, it forces the ore box discharge hole in the rolling grid to move; The discharge grading and screening component is installed at the rear end of the cleaning barrel, with its head end located just below the tail end of the roller grid. It receives the ore discharged from the roller grid and outputs the cleaned ore according to size classification. The transfer unit has a head end connected to the discharge grading and screening component and a tail end connected to the feed component, and places the ore within a certain size range screened in the discharge grading and screening component back into the rolling grid.

2. The ore desliming and primary screening device according to claim 1, characterized in that: The support roller is tapered into a conical gear; the cleaning barrel is provided with a conical toothed belt corresponding to the support roller; the four support rollers are divided into two groups along the axis of the cleaning barrel; the cone angles of the two groups of support rollers are facing each other or facing each other.

3. The ore desliming and primary screening device according to claim 1, characterized in that: The rolling grid includes a feed pipe, a cleaning pipe, and a discharge pipe in sequence from the front end to the rear end of the cleaning barrel along the axial direction of the cleaning barrel; the front end of the feed pipe is fixedly connected to the inner side surface of the feed sealing plate; the spiral blades are arranged on the inner wall of the discharge pipe; the rear end of the discharge pipe is fixedly connected to the discharge sealing plate; the feed pipe is funnel-shaped, and the front end diameter is smaller than the rear end; the cleaning pipe is a circular tube; the discharge pipe is funnel-shaped, and the front end diameter is larger than the rear end.

4. The ore desliming and primary screening device according to claim 3, characterized in that: At least three supporting rollers are provided in the cleaning barrel to support the rolling grid in the cleaning pipe; the inner walls of the feeding pipe and the cleaning pipe are both provided with teeth; the height of the spiral blade does not exceed one fifth of the diameter of the end of the discharge pipe.

5. The ore desliming and primary screening device according to claim 3, characterized in that: At least three support rods are provided on the outer surface of the discharge pipe. The support rods are evenly distributed in a circular array around the axis of the discharge pipe, one end of the support rods is fixedly connected to the outer side surface of the discharge pipe, and the other end is fixedly connected to the inner wall of the discharge hole.

6. The ore desliming and primary screening device according to claim 1, characterized in that: The discharging grading and screening component comprises: The coarse material receiving trough is tiltedly arranged at the rear end of the cleaning barrel through a vibrating frame, with the head end located just below the tail end of the rolling mesh frame; a coarse hole is provided at the bottom of the coarse material receiving trough; The medium material receiving trough is tilted and arranged directly below the coarse material receiving trough through a vibrating frame to receive the ore falling from the coarse holes of the coarse material receiving trough; the bottom of the medium material receiving trough is provided with medium material; the discharge port of the medium material receiving trough is connected to the head end of the transfer unit; The fine material receiving trough is tilted and arranged directly below the medium material receiving trough through a vibrating frame to receive the ore falling from the middle hole of the medium material receiving trough.

7. The ore desliming and primary screening device according to claim 6, characterized in that: The transfer unit includes: The low-level horizontal conveyor belt has its head end located just below the discharge port of the intermediate material receiving trough; The lifting conveyor belt has its lower end located just below the tail end of the low level conveyor belt; The head end of the high-level horizontal conveyor belt is located directly below the upper end of the lifting conveyor belt, and the tail end is located directly above the feed assembly.

8. The ore desliming and primary screening device according to claim 7, characterized in that: The low-level horizontal conveyor belt, the lifting conveyor belt, and the high-level horizontal conveyor belt are all conveyor belt structures with side rails; the side rails on both sides of the middle of the lifting conveyor belt are provided with notches; and a material receiving box is provided directly below the middle of the lifting conveyor belt opposite the notch of the side rails.

9. The ore desliming and primary screening device according to claim 8, characterized in that: A plurality of groups of V-shaped rollers are arranged in the middle of the lifting conveyor belt, with the tips facing upwards; the conveying surface in the middle of the lifting conveyor belt is formed into a ridge shape; and the material receiving box is arranged obliquely.

10. The ore desliming and primary screening device according to claim 8, characterized in that: The cleaning barrel is also provided with a tubular water injection pipe, which is sheathed outside the rolling grid; the two ends of the water injection pipe are respectively fixed to the feed sealing plate and the discharge sealing plate; the water injection pipe is provided with a plurality of water outlet holes obliquely pointing to the rear end of the cleaning barrel; the inner wall of the cleaning barrel is frustum-shaped, and the inner diameter of the front end is smaller than the inner diameter of the rear end; the discharge sealing plate is provided with at least one drainage port in the area between the water injection pipe and the inner wall of the cleaning barrel; The feed sealing plate is a liquid rotary joint with an external inlet and a side outlet; the liquid outlet of the feed sealing plate faces the area between the water injection pipe and the inner wall of the cleaning barrel.

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