Feeding system of semi-autogenous mill

Abstract

The invention 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] The invention relates to the technical field of semi-autogenous mills, and in particular to a feeding system for a semi-autogenous mill. Background Art

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

[0003] During the use of the SAG mill, there are many problems with the existing feeding system. First, there is a high height difference between the SAG mill feeding belt and the mill inlet, and the position of the drop point is not correct. When the ore falls, the impact force on the feeding trolley and the hopper is too great, resulting in excessive wear of the feeding trolley and the hopper, a high failure rate, and monthly shutdown for repair and maintenance. Second, the sealing of the connection between the feeding trolley and the SAG mill inlet is poor, and there are water and material leakage phenomena, which brings inconvenience to civilized production. Third, during maintenance, the trolley and the belt drop hopper are connected by flanges. There is material accumulation at the flange joint, which makes it difficult to push the trolley out, and the resistance is huge. It takes time and effort to push the trolley out each time. Fourth, during production, the belt drop generates dust, which pollutes the working environment. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a semi-autogenous grinding mill feeding system, which includes a feeding belt, a belt dropping hopper, a V-shaped receiving hopper, a square rubber flexible connection, a feeding trolley, a trumpet-shaped guide bushing, a rubber sealing ring, and two spiral nozzles for spraying mineral water; the discharge end of the feeding belt is higher than the feed end of the feeding belt, the belt dropping hopper is located below the discharge end of the feeding belt, the V-shaped receiving hopper is located inside the belt dropping hopper and on the falling path of the material conveyed by the feeding belt, the square rubber flexible connection is located below the belt dropping hopper, and the feeding trolley is located above the square rubber flexible connection. At the bottom, the square rubber flexible connection is connected between the discharge port of the belt dropping hopper and the feed port of the feeding trolley, the connection between the square rubber flexible connection and the feeding trolley is fixed by a clamp, the trumpet-shaped guide bushing is arranged at the feed port of the semi-autogenous mill and connected to the discharge port of the feeding trolley, the rubber sealing ring is provided at the connection portion between the trumpet-shaped guide bushing and the feeding trolley, the two spiral nozzles for spraying mineral water are located near the belt dropping hopper, one of the spiral nozzles is located above the belt dropping hopper, and is installed vertically downward to spray mineral water toward the inside of the belt dropping hopper.

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

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

[0007] In one embodiment, the end with a larger diameter of the trumpet-shaped flow guide bushing faces the interior of the SAG mill.

[0008] In one embodiment, springs are arranged around the square rubber flexible connection. When the clamp is released, the square rubber flexible connection is pulled up by the springs and separated from the feeding trolley.

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

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

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

[0012] In one embodiment, the feeding trolley has a driving device and wheels, and the driving device includes a motor and a reducer.

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

[0014] (1) Extend the service life of the belt hopper and feeding trolley, reduce the frequency of equipment repair and maintenance, and reduce production costs.

[0015] (2) The sealing performance between the feed trolley and the inlet of the semi-autogenous grinding mill has been enhanced, which has solved the problem of water leakage and material leakage and improved 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 a quick clamp. When the trolley needs to be pushed out, the quick clamp is released and the flexible connection is pulled up by the spring. At this time, the trolley is disconnected from the upper hopper, and the feeding trolley can be smoothly pushed out, and it can also play a sealing role.

[0017] (4) The semi-autogenous grinding mill feed water is set above the belt discharge hopper, and water is supplied in two directions, which presses down the high-temperature positive pressure air and washes the belt discharge from the side, effectively reducing dust and avoiding environmental pollution.

[0018] (5) The feeding structure is optimized, the occurrence of material blockage is reduced, and production efficiency and capacity are improved.

[0019] (6) The feeding trolley is designed with electric drive, which facilitates maintenance operations and saves time and manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The embodiments of the present invention are further described below with reference to the accompanying drawings, in which:

[0021] Figure 1 Schematic diagram of the structure of a semi-autogenous mill feeding system according to one embodiment.

[0022] Figure 2 The motion curve of belt dropping is shown;

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

[0024] Figure 4 is a schematic diagram of a trumpet-shaped flow guide bushing according to an embodiment;

[0025] Figure 5 It is a schematic diagram of the assembly of a trumpet-shaped flow guide bushing, a rubber sealing ring and a feeding trolley according to an embodiment;

[0026] Figure 6 It is a schematic diagram of assembly details of a trumpet-shaped flow guide bushing and a rubber sealing ring according to an embodiment.

[0027] The meanings of the accompanying numbers are as follows: 1-feeding belt; 2-belt drop hopper; 3-V-shaped receiving hopper; 4-square rubber flexible connection; 5-feeding trolley; 6-driving device; 7-manhole; 8-rubber sealing ring; 9-trumpet-shaped guide bushing; 10-semi-autogenous mill feed port; 11-semi-autogenous mill. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

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

[0030] The discharge end of the feeding belt 1 is set to be higher than the feed end of the feeding belt 1, so that the feeding belt 1 can throw the material out obliquely at a certain elevation angle. In one embodiment, the angle between the feeding belt 1 and the horizontal plane (that is, the elevation angle of the feeding belt 1) is between 10-14 degrees, for example, 12 degrees. The belt drop 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 drop hopper 2 and on the falling path of the material transported by the feeding belt 1. The square rubber flexible connection 4 is located below the belt drop hopper 2, and 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 drop hopper 2 and the feed port of the feeding trolley 5. In order to conveniently detach the square rubber flexible connection 4 from the feeding trolley 5 when needed, a clamp is used to fix the connection between the square rubber flexible connection 4 and the feeding trolley 5, so that when the clamp is released, the feeding trolley 5 can be disconnected from the square rubber flexible connection 4. The trumpet-shaped flow guide bushing 9 is arranged at the feed port 10 of the semi-autogenous mill and connected to the discharge port of the feeding trolley 5 . A rubber sealing ring 8 is provided at the connection position between the trumpet-shaped flow guide bushing 9 and the feeding trolley 5 .

[0031] In one embodiment, the feeding trolley 5 has a driving device 6 and wheels, wherein the driving device 6 includes a motor and a reducer. Through the driving device and wheels, the feeding trolley 5 can be moved to a desired location after the feeding trolley 5 is disconnected from the square rubber flexible connection 4.

[0032] In the traditional SAG mill feeding system, the belt hopper is often easily damaged. This is mainly due to two reasons: (1) The material drop height is large. Usually, the relative height between the feeding belt and the SAG mill inlet is 5.8 meters. As slag and other materials fall from the feeding belt, the huge gravitational potential energy is converted into kinetic energy, which directly impacts the belt hopper and causes damage to it; (2) There is a lack of a removable liner with excellent wear resistance and impact resistance inside the belt hopper. The liner cannot be used to protect the belt hopper and cannot be quickly replaced when the liner is damaged.

[0033] The semi-autogenous grinding mill feeding system of the present application is usually adopted, and a V-shaped receiving hopper 3 is designed and installed in the belt hopper 2 below the feeding belt 1, which is used to buffer the kinetic energy of materials such as slag. 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. In order to determine the installation position of the V-shaped receiving hopper 3, it is necessary to determine the movement trajectory of the material conveyed by the feeding belt 1. As mentioned above, the feeding belt 1 can obliquely throw the material out at a certain elevation angle. Therefore, the material will move in a parabola after leaving the feeding belt 1 (see Figure 2). According to the parabolic motion formula and parameters such as the feeding belt speed and feeding belt inclination angle, the motion trajectory of the material after leaving the feeding belt 1 can be calculated, so as to determine the position where the material hits the belt drop hopper 2 after being thrown out, and set a V-shaped receiving hopper 3 at this position. The V-shaped receiving hopper 3 can store materials, thus forming a material smashing mode, which effectively reduces the direct impact of the material on the belt drop hopper 2.

[0034] In one embodiment, a liner, such as a thickened anti-smashing liner, is installed in the V-shaped receiving hopper 3. In one embodiment, a liner can be set on the opposite side and below the V-shaped receiving hopper 3 according to the movement trajectory of the material, so as to increase the service life of the belt dropping hopper 2. In one embodiment, the liner is installed in the V-shaped receiving hopper 3 in a detachable manner, so that when the liner is damaged due to long-term use, the liner can be replaced quickly and conveniently. In one embodiment, an alloy material that is resistant to smashing and wear can be selected to make the liner, thereby increasing the service life of the liner, and the liner design can be optimized to make the liner easy to install and replace.

[0035] In one embodiment, the lower half of the belt drop hopper 2 gradually narrows downward. By gradually tightening the lower half of the belt drop hopper 2 from all sides toward the feeding port of the feeding trolley, and designing the structures of the belt drop hopper 2 and the feeding trolley 5, the angle of the belt drop hopper 2 can be matched with the feeding angle of the feeding trolley 5, so that when the material falls from the feeding belt 1, it can smoothly enter the feeding port of the feeding trolley 5 through the belt drop hopper 3, ensuring smooth material flow, and using the potential energy of the material to quickly enter the interior of the semi-autogenous mill, avoiding the formation of backlogs inside the feeding trolley 5 and causing blockage. In one embodiment, a manhole 7 is provided on the feeding trolley 5.

[0036] The trumpet-shaped flow guide bushing 9 is used to quickly guide the material flow, so that the material quickly enters the interior of the semi-autogenous mill, and prevents the material inside the semi-autogenous mill from splashing outward. It can play an excellent sealing performance and protect the hollow shaft of the semi-autogenous mill. In one embodiment, the end with a large diameter of the trumpet-shaped flow guide bushing 9 faces the interior of the semi-autogenous mill. In the traditional semi-autogenous mill feeding system, the main place where leakage occurs is the matching point between the feeding trolley and the semi-autogenous mill. The original matching method is a direct socket structure. The gap between the feeding trolley chute and the semi-autogenous mill feed port is too large and cannot be sealed. As long as the semi-autogenous mill is rotating, leakage will occur. In the present application, in order to change this unreasonable structure, the matching mode between the feeding trolley and the feed port of the semi-autogenous mill is redesigned, and a trumpet-shaped flow guide bushing 9 is designed at the feed port of the semi-autogenous mill. The "large-caliber" end of the trumpet-shaped flow guide bushing 9 faces the inside of the semi-autogenous mill. When the material enters the feeding trolley, it directly enters the semi-autogenous mill through the trumpet-shaped flow guide bushing 9. The trumpet-shaped flow guide bushing 9 also blocks the material thrown up by the semi-autogenous mill from splashing outward when it is running. The trumpet-shaped flow guide bushing 9 can also play a role in protecting the hollow shaft, replacing the original bushing liner with a high failure rate. In addition, by arranging a rubber sealing ring 8 at the position where the trumpet-shaped flow guide bushing 9 is connected to the feeding trolley 5, it can play a good sealing role when the semi-autogenous mill is running, and achieve zero leakage. In one embodiment, the gap between the rubber sealing ring 8 and the trumpet-shaped flow guide bushing 9 is less than 1 mm.

[0037] In one embodiment, the square rubber flexible connection 4 is provided with springs around it. When the clamp at the connection between the square rubber flexible connection 4 and the feeding trolley 5 is loosened, the square rubber flexible connection 4 is pulled up by the spring and separated from the feeding trolley 5, so that the feeding trolley 5 can move freely. In the traditional semi-autogenous mill feeding system, it is often difficult to push out the feeding trolley during maintenance. The main reason is that there is material accumulation between the feeding trolley and the upper belt drop hopper. After long-term operation, the accumulated material is seriously adhered, which blocks the feeding trolley and makes it difficult to push it out. In order to enable the feeding trolley and the upper belt drop hopper to be quickly disconnected during maintenance and to play a good sealing role during production, the connection method between the feeding trolley and the belt drop hopper is redesigned. Specifically, a square rubber flexible connection with a spring is designed. When the feeding trolley is installed in place, the square rubber flexible connection is pulled down and clamped to the feeding trolley using a quick clamp. When the feeding trolley needs to be pushed out, the quick clamp is released, and the square rubber flexible connection is pulled up by the springs arranged 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] The traditional feeding trolley has no driving mechanism, and the operation of the feeding trolley requires manual or other mechanical assistance. In one embodiment of the present application, the feeding trolley 5 has a driving device 6 and wheels, and the driving device 6 includes a motor and a reducer. Through the driving device 6 and the wheels, the feeding trolley 5 can be moved to the required place after the feeding trolley 5 is disconnected from the square rubber flexible connection 4. In one embodiment, considering the compact structure on site, a KA-type reducer can be selected. After load calculation, a 7.5KW motor is selected as the power source, with a reduction ratio of 1:270 and a running speed of 10m / min. It can also be equipped with a wireless remote control. When the feeding trolley needs to be pushed out for maintenance, the operator loosens the quick clamp of the square rubber flexible connection, and uses a remote control to control the feeding trolley to run backward to the specified position, which can save time and manpower.

[0039] In one embodiment, the SAG mill feeding system includes two spiral nozzles for spraying feed water near the belt hopper 2, one of which is located above the belt hopper 2 and sprays feed water toward the inside of the belt hopper 2 in a vertically downward installation. In one embodiment, the other spiral nozzle may be located above the side of the belt hopper 2 to spray feed water to wash the materials discharged from the feed belt 1 to avoid dust. In order to prevent the feed water from being sprayed onto the feed belt 1, a concentric reducer may be installed on the outside of the spiral nozzle to control the spraying angle, which not only suppresses dust but also prevents the belt from carrying materials on the return trip.

[0040] When using the traditional SAG mill feeding system, the dust in the grinding workshop is relatively large. The dust in the grinding workshop mainly comes from the SAG mill feeding belt. When the material falls from the feeding belt at an angle, some fine stone particles will be raised during the material dropping process. The lower part of the dropping point is the running SAG mill. The high-temperature gas generated by the SAG mill during operation moves upward from the feed port. These fine particles move at a certain speed driven by the high-temperature airflow and roll around to escape. This part of the air is called induced air. The induced air will suck in a part of the dust and flow with the air to form unorganized dust. This part of the dust diffuses and floats to the surrounding air, thereby causing dust pollution to the air within a certain distance and range of the working environment, and spreads to the entire workshop after long-term operation. The dust occurrence at the above-mentioned pollution points has the following characteristics: 1) They all belong to the form of unorganized emission pollution, and the dust is difficult to capture; 2) They are greatly affected by the induced high-temperature positive pressure wind in the dropping hopper; 3) The dust particles are relatively fine. The traditional semi-autogenous mill water inlet is installed on the side of the feeding trolley, which cannot solve the problem of dust pollution. In the solution of the present application, a spiral nozzle is arranged above the belt drop hopper 2, which can not only spray the material discharged from the feeding belt 1 to suppress dust, but also suppress or block the high-temperature airflow generated by the mill, which can kill two birds with one stone.

[0041] The SAG mill feeding system of the present application can be a completely new system, or it can be realized by modifying an old system. The following describes the installation methods of some components of the SAG mill feeding system of the present application with respect to the modification of the old system. Those skilled in the art understand that these installation methods are only used for illustration and are not limitations of the SAG mill feeding system of the present application.

[0042] (I) Installation of trumpet-type guide bushing

[0043] In one embodiment, the trumpet-shaped guide bushing flange has 8 φ38 bolt holes, while the traditional SAG mill feed inlet bushing has no bolt holes, and these 8 bolt holes need to be drilled and positioned on site. If the positioning error is large, the trolley will be poorly sealed or even unable to be installed in place. If the SAG mill feed inlet bushing is disassembled and taken down for positioning, the allowable error can be achieved, but the feed inlet bushing weighs 7 tons, and it is difficult to disassemble and install. After comprehensive consideration, it was decided not to disassemble the feed inlet bushing and perform positioning and installation online. However, after the semi-autogenous grinding mill had been in operation for several years, no reference surface for positioning could be found on site. Therefore, a positioning mold was designed. The positioning mold is an annular flat flange with a thickness of 10mm. The pitch circle diameter is consistent with the pitch circle of the trumpet-shaped guide bushing flange, and 8 φ36 holes are evenly distributed. The mold is processed on a machine tool, and the error is controlled within the range of 0.05mm. The positioning flange is placed at the feed inlet, and 4 fixing blocks are evenly distributed at the feed inlet. A top screw is installed on each fixing block to fix the positioning flange and the bushing to limit the horizontal degree of freedom. Four positioning blocks are evenly welded on the positioning flange, and top screws are also installed on the positioning blocks to adjust the positioning. To check the concentricity of the positioning flange and the feed inlet, a fixed bracket is installed next to the feed inlet to set up a dial indicator. The dial indicator is used to calibrate the inner hole of the positioning flange. At this time, the semi-autogenous mill is started to drive slowly, the deviation data of the positioning flange is recorded, and the positioning block top screw of the positioning flange is adjusted at the same time. The table is repeatedly used for adjustment. The final positioning error is within 0.1mm, which meets the design requirements. After calibrating the concentricity of the positioning flange, a magnetic drill is used to drill holes according to the prefabricated holes of the positioning flange. After drilling, M36 bolts are installed and nuts are tightened. The bolt heads are fixed by diagonal welding. After the bolt temperature drops to room temperature, the positioning flange is removed to complete the positioning work. Use a crane and a forklift to install the trumpet-shaped guide bushing at the feed inlet of the semi-autogenous mill.

[0044] (II) Installation of belt drop hopper

[0045] The belt hopper is made on site according to the design drawings. After the production is completed, the internal liner is installed in the hopper and drilled on site to minimize the installation error of the liner bolt holes. The old belt hopper is removed, the new hopper is installed, and finally the internal liner is installed. It should be noted that the hopper liner bolts should be installed with rubber sealing gaskets and tightened with metal bowl-shaped glands to avoid water leakage.

[0046] (III) Installation of feeding trolley

[0047] The feeding trolley of the semi-autogenous grinding mill has been completely redesigned, with an electric drive device added. The chassis and trolley bucket of the feeding trolley are prefabricated and placed on the running track. Since the chute part of the trolley is designed with an annular rubber seal and cooperates with the trumpet-type 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 should be controlled within 1mm. Move the trolley chassis and trolley bucket to the feed port of the semi-autogenous mill. Use 4 jacks to support the trolley bucket on the trolley chassis and adjust the height of the trolley bucket. Observe that the annular rubber seal of the trolley chute can basically be inserted into the trumpet-type guide bushing. At this time, turn the feeding trolley chassis and slowly move the trolley forward. At the same time, fine-tune the height of the trolley so that the annular seal is inserted into the trumpet-type guide bushing. Use a frame level to calibrate the flatness of the trolley. Use a feeler gauge to measure the gap between the annular seal and the trumpet-type guide bushing. After adjusting until the error meets the design requirements, use 20# channel steel to make and install the support of the trolley bucket and chassis on site, and install scissor braces for reinforcement. The overall frame of the trolley is completed. Like the belt drop hopper, drill and install the liner.

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

[0049] A square rubber flexible connection is installed between the feeding trolley and the belt hopper. First, the flexible connection needs to be inserted into the belt hopper, and then the feeding trolley is driven to the predetermined position, and the lower flange of the square rubber flexible connection is placed on the flange of the feeding trolley. After the position is adjusted, measure the distance between the belt hopper and the square rubber flexible connection. A blind plate is sealed around the hopper and the flexible connection. The blind plate is welded on site, and a quick clamp hook is installed on the flange below the flexible connection. A clamp pressure handle is installed on the flange above the feeding trolley. 8 quick clamps can quickly fix the flexible connection. 8 springs with a wire diameter of 4mm and a diameter of 30mm are installed around the flexible connection. Adjust the installation position of the spring. When the quick clamp is released, the spring pulls up the flexible connection by 20mm. At this time, the trolley can be driven freely. It should be noted that the flange surface of the square rubber flexible connection must be flat and there should be no water leakage after installation.

[0050] (V) Installation of mine water pipeline

[0051] First, remove the old feed water pipeline, lay the new feed water pipeline above the belt drop hopper, install an equal diameter tee on the main pipeline, and divide the feed water into two branches. One branch is installed just above the belt drop hopper, and the other branch is installed on the opposite side of the belt drop direction. After the pipeline is installed, install the spiral nozzle at the end of the pipeline. In order to control the spraying angle, a concentric reducer can be put on the spiral nozzle of the vertical pipeline, and a 45-degree elbow can be put on the spiral nozzle of the pipeline on the opposite side of the belt drop. Choose the appropriate position according to the movement trajectory of the material. The positions of the two nozzles cannot interfere with the material, and the sprayed feed water cannot splash onto the belt, and can meet the design requirements and purposes.

[0052] References herein to "various embodiments", "some embodiments", "one embodiment" or "an embodiment" etc. refer to that a particular feature, structure or property described in conjunction with the embodiment is included in at least one embodiment. Therefore, the phrases "in various embodiments", "in some embodiments", "in one embodiment" or "in an embodiment" etc. appearing throughout this document do not necessarily refer to the same embodiment. In addition, particular features, structures or properties may be combined in any suitable manner in one or more embodiments. Therefore, the particular features, structures or properties shown or described in conjunction with one embodiment may be combined in whole or in part with features, structures or properties of one or more other embodiments without restriction, as long as the combination is not illogical or inoperable. Expressions similar to "according to A", "based on A", "through A" or "using A" appearing herein are intended to be non-exclusive, that is, "according to A" may cover "according to A only" or "according to A and B", unless it is specifically stated that its meaning is "according to A only". In this application, for the sake of clarity, some exemplary operating steps are described in a certain order, but those skilled in the art will understand that each of these operating steps is not essential, and some of the steps may be omitted or replaced by other steps. These operation steps do not have to be executed sequentially in the manner shown; on the contrary, some of these operation steps can be executed in different orders or in parallel according to actual needs, as long as the new execution manner is not illogical or inoperable.

[0053] Some exemplary embodiments of the present invention are described above. It can be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention. The features in these embodiments can be recombined in a suitable manner, and the scheme obtained thereby is still within the protection scope required by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the protection scope required by the present invention.

Claims

1. A semi-autogenous mill feeding system, characterized in that: The invention comprises a feeding belt (1), a belt dropping hopper (2), a V-shaped receiving hopper (3), a square rubber flexible connection (4), a feeding trolley (5), a trumpet-shaped flow guide bushing (9), a rubber sealing ring (8), and two spiral nozzles for spraying mineral water; the discharge end of the feeding belt (1) is higher than the feed end of the feeding belt (1); the belt dropping hopper (2) is located below the discharge end of the feeding belt (1); the V-shaped receiving hopper (3) is located inside the belt dropping hopper (2) and on the falling path of the material transported by the feeding belt (1); the square rubber flexible connection (4) is located below the belt dropping hopper (2); the feeding trolley (5) is located below the square rubber flexible connection (4); the square The rubber flexible connection (4) is connected between the discharge port of the belt 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 a clamp; the trumpet-shaped guide bushing (9) is arranged at the feed port (10) of the semi-autogenous mill and connected to the discharge port of the feeding trolley (5); the rubber sealing ring (8) is provided at the connection portion between the trumpet-shaped guide bushing (9) and the feeding trolley (5); the two spiral nozzles for spraying mineral water are located near the belt hopper (2); one of the spiral nozzles is located above the belt hopper (2) and is installed vertically downward to spray mineral water toward the inside of the belt hopper (2).

2. The semi-autogenous mill feeding system according to claim 1, characterized in that: A lining plate is installed in the V-shaped receiving hopper (3).

3. The semi-autogenous mill feeding system according to claim 1, characterized in that: The liner is installed in the V-shaped receiving hopper (3) in a detachable manner.

4. The semi-autogenous mill feeding system according to claim 1, characterized in that: The end with a larger diameter of the trumpet-shaped flow guide bushing (9) faces the interior of the semi-autogenous mill.

5. The semi-autogenous mill feeding system according to claim 1, characterized in that: The square rubber flexible connection (4) is provided with springs around it. When the clamp is released, the square rubber flexible connection (4) is pulled up by the springs and is separated from the feeding trolley (5).

6. The SAG mill feeding system according to claim 1, characterized in that: The lower half of the belt drop hopper (2) gradually narrows downward.

7. The SAG mill feeding system according to claim 1, characterized in that: The angle between the feeding belt (1) and the horizontal plane is between 10 and 14 degrees.

8. The SAG mill feeding system according to claim 7, characterized in that: The angle between the feeding belt (1) and the horizontal plane is 12 degrees.

9. The SAG mill feeding system according to claim 1, characterized in that: The feeding trolley (5) has a driving device (6) and wheels, and the driving device (6) includes a motor and a reducer.

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