Feeding system of semi-autogenous mill

Abstract

The utility model relates to the technical field of semi-autogenous mills, in particular to a semi-autogenous mill feeding system which comprises a feeding belt, a belt blanking hopper, a V-shaped receiving hopper, a square rubber flexible connector, a feeding trolley, a horn-shaped flow guide bushing, a rubber sealing ring and two spiral spray heads used for spraying ore feeding water. The V-shaped material receiving hopper is located in the belt blanking hopper and located on a material falling route, the square rubber flexible connector is connected between a discharging port of the belt blanking hopper and a feeding port of the feeding trolley, and the joint of the square rubber flexible connector and the feeding trolley is fixed through a clamp. And the trumpet-shaped flow guide bushing is arranged at the feed port of the semi-autogenous mill and is connected with the discharge port of the feeding trolley. The feeding system of the semi-autogenous mill can operate efficiently and stably, the fault downtime is obviously shortened, the production efficiency is improved, meanwhile, flying dust generated during blanking can be effectively restrained, water leakage and material leakage are prevented, and the production environment is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of semi-autogenous grinding mill technology, specifically to a semi-autogenous grinding mill feeding system. Background Technology

[0002] The statements in this section are merely to provide background information related to the technical solutions of this application to aid understanding, and do not necessarily constitute prior art for the technical solutions of this application.

[0003] The existing feeding system of the semi-autogenous mill has several problems during operation. First, the drop height between the feed belt and the mill inlet is too high, and the material drop point is misaligned. This results in excessive impact force on the feed trolley and hopper when the ore falls, leading to rapid wear and high failure rate, requiring monthly shutdowns for maintenance. Second, the connection between the feed trolley and the mill inlet has poor sealing, causing water and material leaks, hindering efficient production. Third, during maintenance, the flange connection between the trolley and the belt feed hopper results in material accumulation at the flange joints, making it difficult and time-consuming to push the trolley out. Fourth, during production, the belt feed generates dust, polluting the working environment. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a semi-autogenous grinding mill feeding system, comprising a feeding belt, a belt discharge hopper, a V-shaped receiving hopper, a square rubber flexible connector, a feeding trolley, a horn-shaped guide bushing, a rubber sealing ring, and two spiral nozzles for spraying feed water. The discharge end of the feeding belt is higher than the feed end of the feeding belt; the belt discharge hopper is located below the discharge end of the feeding belt; the V-shaped receiving hopper is located inside the belt discharge hopper and on the path of the material being conveyed by the feeding belt; the square rubber flexible connector is located below the belt discharge hopper; and the feeding trolley is located below the square rubber flexible connector. Below, the square rubber flexible connector connects the discharge port of the belt conveyor hopper to the inlet of the feeding trolley. The connection between the square rubber flexible connector and the feeding trolley is secured with clamps. The horn-shaped guide bushing is installed at the inlet of the semi-autogenous mill and connected to the discharge port of the feeding trolley. The part where the horn-shaped guide bushing connects to the feeding trolley is provided with the rubber sealing ring. The two spiral nozzles for spraying feed water are located near the belt conveyor hopper, with one spiral nozzle located above the belt conveyor hopper and spraying feed water into the belt conveyor hopper in a vertically downward manner.

[0005] In one embodiment, a liner is installed in the V-shaped receiving hopper.

[0006] In one embodiment, the liner is detachably installed in the V-shaped hopper.

[0007] In one embodiment, the larger diameter end of the horn-shaped flow guide bushing faces the interior of the semi-autogenous mill.

[0008] In one embodiment, the square rubber flexible joint is provided with springs around its perimeter. When the clamp is released, the square rubber flexible joint is pulled up by the springs and disengaged from the feeding trolley.

[0009] In one embodiment, the lower half of the belt conveyor hopper gradually narrows downwards.

[0010] In one embodiment, the angle between the feed belt and the horizontal plane is between 10 and 14 degrees.

[0011] In one embodiment, the angle between the feed belt and the horizontal plane is 12 degrees.

[0012] In one embodiment, the feeding trolley has a drive unit and wheels, the drive unit including a motor and a reducer.

[0013] The semi-autogenous mill feeding system of this invention can operate efficiently and stably, significantly reduce downtime due to malfunctions, and completely solve the problems of water and material leakage and excessive dust. Its beneficial effects include:

[0014] (1) It extends the service life of the belt feeder and the feeding trolley, reduces the frequency of equipment maintenance and repair, and lowers production costs.

[0015] (2) The sealing between the feeding trolley and the semi-autogenous mill inlet has been improved, solving the problems of water and material leakage and improving the production environment.

[0016] (3) A square rubber flexible connection is designed between the feeding trolley and the belt hopper to avoid material accumulation at the joint. The square rubber flexible connection is clamped by quick clamps. When the trolley needs to be pushed out, the quick clamps are released and the flexible connection is pulled up by the spring. At this time, the trolley is disconnected from the upper hopper and can be pushed out smoothly. At the same time, it can also play a sealing role.

[0017] (4) The feed water of the semi-autogenous mill is set above the conveyor belt hopper, and water is supplied from two directions. The high temperature positive pressure air is pressed down, and the material is washed from the side of the conveyor belt, which effectively reduces dust and avoids environmental pollution.

[0018] (5) The feeding structure has been optimized, reducing the occurrence of material blockage and improving production efficiency and capacity.

[0019] (6) The feeding trolley is designed with electric drive, which facilitates maintenance operations and saves time and manpower. Attached Figure Description

[0020] The embodiments of this utility model will be further described below with reference to the accompanying drawings, wherein:

[0021] Figure 1 This is a structural schematic diagram of a semi-autogenous mill feeding system according to one embodiment.

[0022] Figure 2 The motion curve of the conveyor belt unloading is shown;

[0023] Figure 3 This is a cross-sectional schematic diagram of a feeding system according to one embodiment;

[0024] Figure 4 This is a schematic diagram of a horn-shaped flow guide bushing according to one embodiment;

[0025] Figure 5 This is an assembly diagram of a horn-shaped flow guide bushing, a rubber sealing ring, and a feeding trolley according to one embodiment;

[0026] Figure 6 This is a schematic diagram showing the assembly details of the horn-shaped flow guide bushing and the rubber sealing ring according to one embodiment.

[0027] The meanings of the reference numerals in the attached drawings are as follows: 1-Feeding belt; 2-Belt discharge hopper; 3-V-type receiving hopper; 4-Square rubber flexible connector; 5-Feeding trolley; 6-Drive device; 7-Manhole; 8-Rubber sealing ring; 9-Flare-type guide bushing; 10-Semi-autogenous mill feed inlet; 11-Semi-autogenous mill. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0029] Figure 1 This is a structural schematic diagram of a semi-autogenous mill feeding system according to one embodiment. The semi-autogenous mill feeding system includes a feeding belt 1, a belt discharge hopper 2, a V-shaped receiving hopper 3, a square rubber flexible connector 4, a feeding trolley 5, a horn-shaped guide bushing 9, a rubber sealing ring 8, and two spiral nozzles located near the belt discharge hopper 2 for spraying feed water.

[0030] The discharge end of the feeding belt 1 is set higher than the feed end, allowing the feeding belt 1 to throw the material out at a certain angle. In one embodiment, the angle between the feeding belt 1 and the horizontal plane (i.e., the angle of elevation of the feeding belt 1) is between 10 and 14 degrees, for example, 12 degrees. The belt hopper 2 is located below the discharge end of the feeding belt 1, and the V-shaped receiving hopper 3 is located inside the belt hopper 2 and on the falling path of the material conveyed by the feeding belt 1. The square rubber flexible connector 4 is located below the belt hopper 2, and the feeding trolley 5 is located below the square rubber flexible connector 4. The square rubber flexible connector 4 connects the discharge port of the belt hopper 2 and the feed port of the feeding trolley 5. To facilitate the separation of the square rubber flexible connector 4 from the feeding trolley 5 when needed, clamps are used to fix the connection between the square rubber flexible connector 4 and the feeding trolley 5. Thus, when the clamps are released, the feeding trolley 5 can be disconnected from the square rubber flexible connector 4. A horn-shaped guide bushing 9 is installed at the feed inlet 10 of the semi-autogenous mill and connected to the discharge outlet of the feeding trolley 5. A rubber sealing ring 8 is provided at the connection between the horn-shaped guide bushing 9 and the feeding trolley 5.

[0031] In one embodiment, the feeding trolley 5 has a drive unit 6 and wheels, the drive unit 6 including a motor and a reducer. This drive unit and wheels allow the feeding trolley 5 to be moved to the desired location after it has been disconnected from the square rubber flexible connection 4.

[0032] In traditional semi-autogenous mill feeding systems, belt feeders are often damaged, mainly due to two reasons: (1) The material drop is large. Usually, the relative height between the feed belt and the semi-autogenous mill inlet is 5.8 meters. As materials such as slag fall from the feed belt, the huge gravitational potential energy is converted into kinetic energy, which directly impacts the belt feeder and causes it to be damaged; (2) The belt feeder lacks a removable liner with excellent wear resistance and impact resistance. It is impossible to protect the belt feeder with the liner and replace it quickly when the liner is damaged.

[0033] The semi-autogenous mill feeding system described in this application typically employs a V-shaped receiving hopper 3 installed within the belt feed hopper 2 below the feeding belt 1. This hopper buffers the kinetic energy of materials such as slag. The V-shaped receiving hopper 3 is located inside the belt feed hopper 2 and along the falling path of the material conveyed by the feeding belt 1. To determine the installation position of the V-shaped receiving hopper 3, it is necessary to determine the trajectory of the material conveyed by the feeding belt 1. As mentioned above, the feeding belt 1 can throw the material obliquely at a certain angle; therefore, the material will move in a parabolic trajectory after leaving the feeding belt 1 (see...). Figure 2Based on the parabolic motion formula and parameters such as the feed belt speed and feed belt elevation angle, the trajectory of the material after leaving the feed belt 1 can be calculated, thereby determining the position where the material impacts the belt discharge hopper 2 after being thrown out, and a V-shaped receiving hopper 3 is set at this position. The V-shaped receiving hopper 3 can store the material, thus forming a material-on-material pattern, effectively reducing the direct impact of the material on the belt discharge hopper 2.

[0034] In one embodiment, a liner, such as a thickened impact-resistant liner, is installed in the V-shaped receiving hopper 3. In one embodiment, liners can be installed on the opposite side and below the V-shaped receiving hopper 3 according to the material's movement trajectory, thereby increasing the service life of the belt conveyor hopper 2. In one embodiment, the liner is detachably installed in the V-shaped receiving hopper 3, allowing for convenient and quick replacement of the liner when it is damaged due to prolonged use. In one embodiment, the liner can be made of an impact-resistant and wear-resistant alloy material to extend its service life, and the liner design can be optimized to facilitate installation and replacement.

[0035] In one embodiment, the lower half of the belt conveyor hopper 2 gradually narrows downwards. By gradually tightening the lower half of the belt conveyor hopper 2 from all sides towards the feed inlet of the feeding trolley, and by designing the structure of the belt conveyor hopper 2 and the feeding trolley 5, the angle of the belt conveyor hopper 2 can be matched with the feeding angle of the feeding trolley 5. This ensures that when material falls from the feeding belt 1, it can smoothly enter the feed inlet of the feeding trolley 5 through the belt conveyor hopper 3, ensuring smooth material flow and utilizing the potential energy of the material to quickly enter the semi-autogenous mill, avoiding material accumulation and blockage inside the feeding trolley 5. In one embodiment, the feeding trolley 5 is provided with a manhole 7.

[0036] The horn-shaped guide bushing 9 is used to quickly guide the material flow, allowing the material to enter the semi-autogenous mill rapidly and preventing material from splashing outwards. It provides excellent sealing performance and also protects the hollow shaft of the semi-autogenous mill. In one embodiment, the larger diameter end of the horn-shaped guide bushing 9 faces the interior of the semi-autogenous mill. In traditional semi-autogenous mill feeding systems, the main point of material leakage is the mating point between the feeding trolley and the semi-autogenous mill. The original mating method was a direct socket structure, and the gap between the feeding trolley chute and the semi-autogenous mill inlet was too large, making it impossible to seal. Material leakage would occur whenever the semi-autogenous mill was in operation. In this application, to change this unreasonable structure, the connection between the feeding trolley and the semi-autogenous mill inlet is redesigned. A trumpet-shaped guide bushing 9 is designed at the semi-autogenous mill inlet, with the "larger diameter" end of the trumpet-shaped guide bushing 9 facing the interior of the semi-autogenous mill. When the material enters the feeding trolley, it directly enters the semi-autogenous mill through the trumpet-shaped guide bushing 9. The trumpet-shaped guide bushing 9 also prevents material thrown up by the semi-autogenous mill during operation from splashing outwards. The trumpet-shaped guide bushing 9 also protects the hollow shaft, replacing the original bushing liner with a high failure rate. In addition, by setting a rubber sealing ring 8 at the connection between the trumpet-shaped guide bushing 9 and the feeding trolley 5, good sealing performance is achieved during the operation of the semi-autogenous mill, achieving zero leakage. In one embodiment, the gap between the rubber sealing ring 8 and the trumpet-shaped guide bushing 9 is less than 1 mm.

[0037] In one embodiment, the square rubber flexible connection 4 is surrounded by springs. When the clamps at the connection between the square rubber flexible connection 4 and the feeding trolley 5 are released, the square rubber flexible connection 4 is pulled up by the springs and disengaged from the feeding trolley 5, allowing the feeding trolley 5 to move freely. In traditional semi-autogenous mill feeding systems, it is often difficult to push the feeding trolley out during maintenance. The main reason is that material accumulates between the feeding trolley and the upper belt conveyor hopper. After long-term operation, the accumulated material adheres severely, jamming the feeding trolley and making it difficult to push it out. In order to both quickly disengage the feeding trolley from the upper belt conveyor hopper during maintenance and provide a good seal during production, the connection method between the feeding trolley and the belt conveyor hopper has been redesigned. Specifically, a square rubber flexible connection with springs has been designed. After the feeding trolley is installed in place, the square rubber flexible connection is pulled down and clamped onto the feeding trolley using quick clamps. When it is necessary to push the feeding trolley out, the quick clamp is released, and the square rubber flexible connector is pulled up by the springs around it. At this time, the feeding trolley is disconnected from the components above it, and the feeding trolley can be moved away conveniently and quickly.

[0038] Traditional feeding trolleys lack a drive mechanism, requiring manual or other mechanical assistance to operate. In one embodiment of this application, the feeding trolley 5 has a drive unit 6 and wheels. The drive unit 6 includes a motor and a reducer. Using the drive unit 6 and wheels, the feeding trolley 5 can be moved to the desired location after being disconnected from the square rubber flexible connection 4. In one embodiment, considering the compact site structure, a KA-type reducer can be selected. After load calculation, a 7.5KW motor is chosen as the power source, with a reduction ratio of 1:270 and a running speed of 10m / min. A wireless remote control can also be provided. When maintenance requires pushing the feeding trolley out, the operator releases the quick clamp of the square rubber flexible connection and uses the remote control to control the feeding trolley to move backward to the designated position, saving time and manpower.

[0039] In one embodiment, the semi-autogenous mill feeding system includes two spiral nozzles located near the belt conveyor hopper 2 for spraying feed water. One spiral nozzle is positioned above the belt conveyor hopper 2 and sprays feed water into the hopper 2 in a vertically downward manner. In another embodiment, the other spiral nozzle may be located to the side above the belt conveyor hopper 2 to spray feed water to wash away the material discharged from the feed belt 1, preventing dust generation. To prevent feed water from spraying onto the feed belt 1, a concentric reducer can be installed on the outside of the spiral nozzle to control the spray angle, thus suppressing dust and preventing material from being carried back onto the belt.

[0040] When using a traditional semi-autogenous mill feeding system, the grinding workshop generates significant dust. The dust primarily originates from the semi-autogenous mill's feed belt. As material falls from the belt at an angle, fine stone particles are stirred up. Below the material drop point is the operating semi-autogenous mill. The high-temperature gas generated during mill operation moves upwards from the feed inlet. These fine particles, propelled by the high-temperature airflow, move at a certain speed, tumbling and dispersing outwards. This air is called induced air. Induced air entrains some dust, which flows with the airflow, forming unorganized dust emissions. This dust disperses and drifts into the surrounding air, causing dust pollution within a certain distance and range of the working environment. After prolonged operation, it spreads throughout the entire workshop. The dust generation at these pollution points has the following characteristics: 1) They are all forms of unorganized emission pollution, making dust difficult to capture; 2) They are significantly affected by the induced high-temperature positive pressure airflow within the feed hopper; 3) The dust particles are relatively fine. Traditional semi-autogenous mills have their feed water installed on the side of the feeding trolley, which cannot solve the problem of dust pollution. In the solution of this application, a spiral nozzle is set above the belt feed hopper 2, which can both spray the material unloaded by the feeding belt 1 to suppress dust and suppress or block the high-temperature airflow generated by the mill, thus achieving two goals at once.

[0041] The semi-autogenous mill feeding system of this application can be a completely new system or it can be achieved by modifying an existing system. The following describes the installation methods of some components of the semi-autogenous mill feeding system of this application in the case of modifying an existing system. Those skilled in the art will understand that these installation methods are only for illustrative purposes and are not intended to limit the semi-autogenous mill feeding system of this application.

[0042] (a) Installation of the horn-shaped flow guide bushing

[0043] In one embodiment, the horn-shaped guide bushing flange has eight φ38 bolt holes, while the traditional semi-autogenous mill feed inlet bushing does not have bolt holes, requiring on-site drilling and positioning of these eight bolt holes. Significant positioning errors can lead to poor trolley sealing or even prevent proper installation. Removing the semi-autogenous mill feed inlet bushing and positioning it allows for acceptable error, but the feed inlet bushing weighs 7 tons, making disassembly and installation difficult. After comprehensive consideration, it was decided to perform online positioning and installation without removing the feed inlet bushing. However, after several years of operation, a suitable reference surface for positioning could no longer be found on-site for the semi-autogenous grinding mill. Therefore, a positioning mold was designed. The positioning mold is a ring-shaped flat flange, 10mm thick, with a pitch circle diameter matching that of the flared guide bushing flange. It has eight evenly distributed φ36 holes. This mold is machined on a machine tool with an error controlled within 0.05mm. The positioning flange is placed at the feed inlet, where four evenly distributed fixing blocks are installed. Each fixing block is fitted with a set screw to secure the positioning flange to the bushing, restricting its horizontal freedom. Four positioning blocks are also evenly welded onto the positioning flange, and set screws are installed on these blocks for adjustment. To ensure the concentricity of the positioning flange and the feed inlet, a fixed bracket was installed next to the feed inlet to mount a dial indicator. The dial indicator was used to calibrate the inner hole of the positioning flange. The semi-autogenous mill was then started at slow drive, and the deviation data of the positioning flange was recorded. Simultaneously, the positioning block screws of the positioning flange were adjusted, and the dial indicator was repeatedly used for adjustment until the final positioning error was within 0.1mm, meeting the design requirements. After calibrating the concentricity of the positioning flange, a magnetic drill was used to drill holes according to the pre-drilled holes on the positioning flange. After drilling, M36 bolts were installed and the nuts were tightened. The bolt heads were then diagonally welded for fixation. After the bolts cooled to room temperature, the positioning flange was removed, completing the positioning work. A crane and forklift were used to install the horn-shaped guide bushing at the feed inlet of the semi-autogenous mill.

[0044] (II) Installation of belt conveyor hopper

[0045] The conveyor belt hopper is fabricated on-site according to the design drawings. After fabrication, the internal liner is installed inside the hopper, and drilling is performed on-site to minimize installation errors of the liner bolt holes. The old conveyor belt hopper is removed, the new hopper is installed, and finally the internal liner is installed. It is important to note that the bolts of the hopper liner must be fitted with rubber sealing washers and tightened with metal cup-shaped caps to prevent water leakage.

[0046] (III) Installation of the feeding trolley

[0047] The semi-autogenous mill feeding trolley has been redesigned with the addition of an electric drive device. The chassis and trolley bucket of the feeding trolley are prefabricated and placed on the running track. Since the trolley chute is designed with an annular rubber seal and matches with the horn-shaped guide bushing, it is necessary to ensure the concentricity of the two, which directly affects the sealing performance of the trolley. Therefore, during the installation of the feeding trolley, the height error of the trolley must be controlled within 1mm. Move the trolley chassis and hopper to the feed inlet of the semi-autogenous mill. Use four jacks to support the trolley hopper on the chassis and adjust its height. Observe that the annular rubber seal of the trolley chute can basically insert into the horn-shaped guide bushing. At this point, rotate the feeding trolley chassis to slowly move the trolley forward, while simultaneously fine-tuning the trolley height so that the annular seal inserts into the horn-shaped guide bushing. Use a frame level to calibrate the flatness of the trolley, and use a feeler gauge to measure the gap between the annular seal and the horn-shaped guide bushing. After adjusting until the error meets the design requirements, use 20# channel steel to fabricate and install the support between the trolley hopper and chassis on-site, and install scissor braces for reinforcement. The overall frame of the trolley is now complete. Similar to the belt conveyor hopper, drill and install the liner.

[0048] (iv) Assembly of feeding trolley and belt conveyor hopper

[0049] A square rubber flexible connector is installed between the feeding trolley and the belt conveyor hopper. First, the flexible connector needs to be fitted into the belt conveyor hopper. Then, the feeding trolley is driven to the predetermined position, and the lower flange of the square rubber flexible connector is placed on the flange of the feeding trolley. After the position is adjusted, the distance between the belt conveyor hopper and the square rubber flexible connector is measured. A blind flange is sealed between the hopper and the flexible connector. The blind flange is welded on site. Quick clamp hooks are installed on the lower flange of the flexible connector, and clamp handles are installed on the upper flange of the feeding trolley. Eight quick clamps can quickly fix the flexible connector. Eight springs with a wire diameter of 4mm and a diameter of 30mm are installed around the flexible connector. The spring installation position is adjusted. When the quick clamps are released, the springs will pull the flexible connector up by 20mm. At this time, the trolley can be driven freely. It should be noted that the flange surface of the square rubber flexible connector must be flat and there should be no water leakage after installation.

[0050] (v) Install mine water supply pipelines

[0051] First, remove the old feed water pipeline and lay the new feed water pipeline above the conveyor belt hopper. Install a tee of equal diameter on the main pipeline to divide the feed water into two branches: one directly above the conveyor belt hopper and the other on the opposite side of the conveyor belt discharge direction. After the pipeline is installed, install spiral nozzles at the ends of the pipelines. To control the spray angle, a concentric reducer can be fitted onto the spiral nozzle on the vertical pipeline, and a 45-degree elbow can be fitted onto the spiral nozzle on the pipeline opposite the conveyor belt discharge direction. Select appropriate positions according to the material movement trajectory. The positions of the two nozzles should not interfere with the material, and the sprayed feed water should not splash onto the conveyor belt, while still achieving the design requirements and objectives.

[0052] References to “various embodiments,” “some embodiments,” “one embodiment,” or “embodiment” throughout this document refer to specific features, structures, or properties described in connection with said embodiments that are included in at least one embodiment. Therefore, the appearance of phrases such as “in various embodiments,” “in some embodiments,” “in one embodiment,” or “in an embodiment” throughout this document does not necessarily refer to the same embodiment. Furthermore, specific features, structures, or properties can be combined in any suitable manner in one or more embodiments. Therefore, specific features, structures, or properties shown or described in connection with one embodiment can be combined, in whole or in part, with features, structures, or properties of one or more other embodiments without limitation, provided that such combination is not illogical or inoperable. Expressions such as “according to A,” “based on A,” “by A,” or “using A” appearing throughout this document are non-exclusive; that is, “according to A” can cover “according to A only” or “according to A and B,” unless specifically stated otherwise. In this application, some illustrative operational steps are described in a certain order for clarity, but those skilled in the art will understand that each of these operational steps is not essential, and some steps can be omitted or replaced by others. These steps do not necessarily have to be performed sequentially as shown. Instead, some of these steps can be performed in different orders or in parallel as needed, as long as the new execution method is not illogical or ineffective.

[0053] The foregoing description describes some exemplary embodiments of this utility model. It is understood that the above embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model. The features in these embodiments can be recombine in a suitable manner, and the resulting solutions are still within the scope of protection claimed by this utility model. Based on the above embodiments, all other embodiments obtained by those skilled in the art without inventive effort, that is, all modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by this utility model.

Claims

1. A semi-autogenous mill feed system characterised in that, The device comprises a feeding belt (1), a belt material hopper (2), a V-shaped material receiving hopper (3), a square rubber flexible connection (4), a feeding trolley (5), a horn-shaped flow guide bushing (9), a rubber sealing ring (8), and two spiral nozzles for spraying water on the feed material; the discharge end of the feeding belt (1) is higher than the feed end of the feeding belt (1), the belt material hopper (2) is located below the discharge end of the feeding belt (1), the V-shaped material receiving hopper (3) is located inside the belt material hopper (2) and on the falling route of the material conveyed by the feeding belt (1), the square rubber flexible connection (4) is located below the belt material hopper (2), the feeding trolley (5) is located below the square rubber flexible connection (4), the square rubber flexible connection (4) is connected between the discharge port of the belt material hopper (2) and the feed port of the feeding trolley (5), the connection between the square rubber flexible connection (4) and the feeding trolley (5) is fixed by using a clamp, the horn-shaped flow guide bushing (9) is arranged at the feed port (10) of the semi-autogenous mill and is connected with the discharge port of the feeding trolley (5), the part where the horn-shaped flow guide bushing (9) is connected with the feeding trolley (5) is provided with the rubber sealing ring (8), and the two spiral nozzles for spraying water on the feed material are located near the belt material hopper (2), one of which is located above the belt material hopper (2) and sprays water vertically downward towards the inside of the belt material hopper (2).

2. A semi-autogenous mill feed system according to claim 1, characterised in that, The V-shaped material receiving hopper (3) is provided with a lining plate.

3. A semi-autogenous mill feed system according to claim 2, characterised in that, The lining plate is detachably installed in the V-shaped material receiving hopper (3).

4. A semi-autogenous mill feed system according to claim 1, characterised in that, The horn-shaped flow guide bushing (9) has a large-diameter end facing the inside of the semi-autogenous mill.

5. A semi-autogenous mill feed system according to claim 1 wherein, The square rubber flexible connection (4) is provided with springs around it, and when the clamp is loosened, the square rubber flexible connection (4) is pulled up by the springs and separated from the feeding trolley (5).

6. A semi-autogenous mill feed system according to claim 1 wherein, The lower half of the belt material hopper (2) is gradually narrowed downward.

7. A semi-autogenous mill feed system according to claim 1 wherein, The angle between the feeding belt (1) and the horizontal plane is between 10-14 degrees.

8. A semi-autogenous mill feed system according to claim 7, characterised in that, The angle between the feeding belt (1) and the horizontal plane is 12 degrees.

9. A semi-autogenous mill feed system according to claim 1 wherein, The feeding trolley (5) has a driving device (6) and wheels, and the driving device (6) comprises a motor and a speed reducer.

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