A laboratory ore sample grinding and automatic screening integrated instrument

Abstract

The utility model discloses a kind of ore sample grinding and automatic screening integration instrument for laboratory, it is related to ore grinding and screening technical field, the instrument includes pedestal, transmission electric control system is respectively equipped on the pedestal, horizontal ball mill and screening device, the horizontal ball mill is communicated with screening device, transmission electric control system is connected with horizontal ball mill, screening device. Utilize the utility model, can realize the closed operation of whole process of ore grinding, screening operation, avoid the dust pollution possibly caused between two processes, improve the work efficiency of two processes simultaneously, and the instrument has customization function, can adjust instrument screening fineness and screening efficiency parameter according to different experimental needs.

Description

Technical Field

[0001] This utility model relates to the field of ore grinding and sieving technology, specifically to an integrated instrument for grinding and automatically sieving mineral samples for laboratory use. Background Technology

[0002] When conducting ore grade analysis or beneficiation experiments in the laboratory, the raw ore blocks are typically crushed and ground to the required particle size before being graded and screened. Finally, fine particles with different specific surface areas are subjected to different beneficiation or ore grade analysis methods. Currently, the grinding equipment commonly used in this workflow is a conical wet ball mill or a horizontal dry mill, while the screening tools are typically manual sieves or negative pressure sieves. Therefore, ore grinding and mineral powder screening naturally become two separate processes. This not only reduces the efficiency of laboratory personnel but also causes mineral powder leakage during the screening process after ore grinding, resulting in laboratory environmental pollution and potential health risks to laboratory staff.

[0003] With the progress of the times, people have begun to pay increasing attention to environmental protection and health issues. Although they wear masks in daily life and use instruments with better sealing for the above-mentioned work, they still cannot solve the problems at their source. Especially after grinding, the screening process inevitably involves manual handling, which is the main factor causing the large amount of mineral dust in the air. Although there are various types of screening instruments on the market, they mainly solve the problem of dust generated during the screening process and improve screening efficiency, but they cannot solve the problem of mineral dust generated during the handling of ore powder after grinding and the collection of ore powder after screening.

[0004] Therefore, there is an urgent need to propose a new device to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an integrated instrument for grinding and automatically screening mineral samples in the laboratory, which addresses the shortcomings of the existing technology. This instrument enables a closed-loop operation of the entire process of grinding and screening ore, avoids dust pollution that may occur between the two processes, reduces manual handling, and improves the efficiency of both processes. In addition, the instrument has a customization function, and the screening fineness and screening efficiency parameters can be adjusted according to different experimental needs.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a laboratory mineral sample grinding and automatic sieving integrated instrument, including a base, on which a transmission and control system, a horizontal ball mill and a sieving device are respectively provided. The horizontal ball mill is connected to the sieving device, and the transmission and control system is connected to the horizontal ball mill and the sieving device.

[0007] Furthermore, the transmission control system mainly consists of a three-phase asynchronous motor, a cycloidal pinwheel reducer, a transformer, a micro motor, and an integrated switch panel;

[0008] The three asynchronous motors provide power for the rolling motion of the horizontal ball mill, and the drive shafts of the three asynchronous motors are connected to the cycloidal pinwheel reducer.

[0009] The cycloidal pinwheel reducer is used to reduce the speed of the drive shaft of the three-phase asynchronous motor, so as to avoid the horizontal ball mill speed being too high, and at the same time alleviate the large torque of the horizontal ball mill on the three-phase asynchronous motor.

[0010] The transformer provides the necessary low-voltage power to the instrument's related components;

[0011] The micro motor provides power to the four-axis brush inside the screening device and controls its rotation speed;

[0012] The integrated switch panel is used to control the start and stop of the instrument, as well as the timely activation and deactivation of related functions of related components of the instrument.

[0013] Furthermore, the horizontal ball mill mainly consists of a high-strength wear-resistant steel tank, steel balls, a feed inlet, a feed inlet cover, fastening buckles, a cylindrical hollow shaft, a baffle mesh, rolling bearings, and a positive pressure high-speed blower;

[0014] The feed inlet is located at the center of the high-strength wear-resistant steel tank and is used to add steel balls and pour in ore blocks at regular intervals; the horizontal ball mill is mainly used to drive the steel balls inside the tank to grind the ore.

[0015] The feed inlet cover is used to close the feed inlet, and the inner side of the feed inlet cover is equipped with a rubber gasket to facilitate sealing of the high-strength wear-resistant steel tank.

[0016] The fastening buckle is used to fix the feed port cover onto the feed port;

[0017] The cylindrical hollow shaft is open at one end and closed at the other end. The open end is connected to the high-strength wear-resistant steel tank body through a flange, and the closed end is connected to the reducer drive shaft through screws.

[0018] The baffle mesh consists of two pieces, which are respectively installed on the side of the cylindrical hollow shaft inside the high-strength wear-resistant steel tank and on the side of the screening device. Its main function is to prevent larger particles of ore and steel balls inside the high-strength wear-resistant steel tank from entering the cylindrical hollow shaft or the screening device during the rotary grinding process.

[0019] There are two rolling bearings, namely a small-diameter rolling bearing and a large-diameter rolling bearing. The outer ring of the small-diameter rolling bearing is fixed to the base, and the inner ring is fixed to the hollow cylindrical shaft. The outer ring of the large-diameter rolling bearing is fixed to the base, and the inner ring is fixed to the high-strength wear-resistant steel tank.

[0020] The positive pressure high-speed blower is located inside the cylindrical hollow shaft and is used to blow high-speed airflow into the high-strength wear-resistant steel tank. The airflow carries the fine mineral powder into the screening device for classification. The closed end of the cylindrical hollow shaft is provided with a vent hole to facilitate the introduction of airflow.

[0021] Furthermore, the feed inlet is cylindrical and protrudes slightly from the surface of the high-strength wear-resistant steel tank.

[0022] Furthermore, the power supply line of the positive pressure high-speed blower is connected through a wire hole. The line is fixed outside the cylindrical hollow shaft and connected to the slip ring on the reducer drive shaft. One side of the brush is fixed to the housing of the cycloidal pinwheel reducer, and the graphite side of the brush contacts the slip ring. In this way, the current is guided from the fixed part to the rotating part, ensuring that the positive pressure high-speed blower is supplied with current during the operation of the horizontal ball mill.

[0023] Furthermore, the screening device mainly consists of a stainless steel grading screening tank, a top cover plate, a pull-out sealing plate, a sample collection funnel, a conical filter plate, a four-axis brush, a square screen, a round screen, a negative pressure high-speed blower, a screen groove, and a rubber gasket.

[0024] The stainless steel grading and screening tank mainly consists of three parts. The upper part is a cuboid, formed by welding four stainless steel plates to form the side tank body, specifically including three screening sections. An opening is made on the side closest to the horizontal ball mill, and an intermediate cylinder is connected to it via flanges and rubber gaskets. The intermediate cylinder is fixedly installed on the base and communicates with the horizontal ball mill. A rubber gasket is installed between the intermediate cylinder and the rolling bearing to form a seal. The middle part is an arc-shaped tank bottom, which is spliced ​​from four arc-shaped stainless steel plates, one for each screening section. The lower part is a sample collection funnel, used to collect the ground mineral powder, one for each screening section. The upper, middle, and lower parts of the stainless steel grading and screening tank are all welded together to form a whole.

[0025] The upper cover is a cuboid with protruding strips on three sides, used to seal the stainless steel grading and screening tank. Rubber gaskets are provided on the inner perimeter and the upper part of the corresponding square screen inside the tank to facilitate sealing the stainless steel grading and screening tank and the three-stage screening area inside the tank.

[0026] The pull-out sealing plate is located at the top of the upper end of the sample collection funnel and is fixed by a groove. It can be opened and closed by a pull-out method to connect with the arc-shaped bottom of the stainless steel grading and screening tank. Rubber gaskets are bonded to its four sides to increase the sealing of the connection.

[0027] The conical filter is located inside the rectangular tank of the last stage of the stainless steel grading and screening tank, in order to prevent the last stage of mineral powder from entering the negative pressure high-speed blower with the airflow.

[0028] There are two quadrilateral brushes, located in the primary screening zone and the secondary screening zone respectively, fixed on the drive shaft of the micro motor and powered by the micro motor.

[0029] The circular screen is located at the inlet end of the stainless steel grading and screening tank and is the first grading screen. Rubber gaskets are bonded to the four sides of the circular screen to increase the sealing of the connection parts.

[0030] There are two square screens located inside the stainless steel grading and screening tank. They are the second and third grading screens, which divide the stainless steel grading and screening tank into three equal spaces of the same size, which is the three-stage screening process.

[0031] The screen grooves are located in the upper rectangular tank of the stainless steel grading and screening tank, at the connection point with the horizontal ball mill, at one-third and two-thirds of the tank, and are used to fix the circular screen and the square screen.

[0032] The negative pressure high-speed blower is fixed to the end of the stainless steel grading and screening tank by bolts, providing negative pressure airflow for the screening device and power airflow for mineral powder grading.

[0033] Furthermore, the upper part of the stainless steel grading and screening tank has 6 pairs of magnetic plates, which are fixed to the outer edge of the upper part of the cuboid tank; the inner side of the two protruding strips of the upper cover plate is equipped with 6 pairs of magnetic plates, which are opposite to the 6 pairs of magnetic plates on the upper part of the stainless steel grading and screening tank. The upper cover plate and the stainless steel grading and screening tank are fixed by magnetic attraction, which facilitates disassembly and installation.

[0034] Furthermore, the upper end of the sample collection funnel is a cube, the middle end of the sample collection funnel is a frustum cavity with the same width and diameter as the cube, and the lower end of the sample collection funnel is a cylindrical discharge port with a raised strip around it to facilitate tying the sample bag to the cylindrical discharge port.

[0035] Furthermore, the square screen can be selected with different aperture sizes according to actual needs; rubber gaskets and magnetic plates are bonded to the square screen frame to increase the sealing between the three screening spaces of the stainless steel grading screening tank, and to prevent ungraded mineral powder particles from entering the next screening space from the outer edge of the screen.

[0036] Furthermore, the base mainly consists of a cast steel base, supporting vertical beams, and horizontal beams;

[0037] The cast steel base primarily provides a flat support surface for the instrument;

[0038] There are four pairs of supporting vertical beams, which are fixed to the long side of the cast steel base by bolts in pairs;

[0039] The crossbeam secures the various components of the instrument to the supporting vertical beam.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] (1) The integrated instrument for grinding and automatic screening of mineral samples provided by this utility model integrates the two processes of grinding and screening, which improves the sample preparation efficiency, eliminates the need for mineral sample transfer, and improves the degree of automation.

[0042] (2) This instrument integrates grinding and sieving operations, has good sealing performance, and avoids the leakage of mineral dust, which may cause environmental pollution or affect the health of experimental personnel.

[0043] (3) A detachable sieve is used, and sieves of different fineness can be added to meet different experimental requirements;

[0044] (4) A rotating brush is designed in the screening device, which can continuously throw the mineral powder that falls on the handle of the pull-out sealing plate onto the screen, greatly improving the screening efficiency. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the integrated laboratory mineral sample grinding and automatic sieving instrument of this utility model;

[0046] Figure 2 for Figure 1 Top view of the screening device of the embodiment shown;

[0047] Figure 3 for Figure 1 A front view of the screening apparatus of the embodiment shown;

[0048] Figure 4 for Figure 1 Left view of the screening device of the illustrated embodiment;

[0049] Figure 5 for Figure 1 A schematic diagram of the overall screening device in the embodiment shown;

[0050] Figure 6 for Figure 1 Enlarged view of the square screen of the screening device in the illustrated embodiment;

[0051] Figure 7 for Figure 1 A schematic diagram showing the connection between the screen groove and the square screen in the screening device of the embodiment shown.

[0052] Figure 8 for Figure 1 Enlarged view of the sample collection funnel of the screening device in the embodiment shown;

[0053] Figure 9 for Figure 1 The diagram shown is an enlarged schematic of the circuit connection of the positive pressure high-speed blower in the embodiment shown.

[0054] Figure 10 for Figure 1 The diagram shows the electronic control system of the embodiment.

[0055] Explanation of the reference numerals in the figure:

[0056] 1. Lower end of the sampling funnel; 2. Middle end of the sampling funnel; 3. Upper end of the sampling funnel; 4. Pull-out sealing plate handle; 5. Arc-shaped tank bottom; 6. Micro motor; 7. Four-axis brush; 8. Crossbeam; 9. Negative pressure high-speed blower; 10. Conical filter; 11. Three-phase asynchronous motor; 12. Transformer; 13. Reducer drive shaft; 14. Vent hole; 15. Supporting vertical beam; 16. Cast steel base; 17. Hollow cylindrical shaft; 18. Positive pressure high-speed blower; 19. Bearing A; 20. Material retainer A; 21. High-strength wear-resistant steel tank body; 22. Material inlet cover; 23. Steel ball; 24. Material retainer B 25. Bearing B; 26. Square screen; 27. Top cover plate; 28. Magnetic suction plate A; 29. ​​Stainless steel grading and screening tank; 30. Bolt hole; 31. Rubber gasket A; 32. Pull-out sealing plate; 33. Columnar discharge port; 34. Rubber gasket B; 35. Screen groove; 36. Magnetic suction plate B; 37. Rubber gasket C; 38. Circular screen; 39. Cycloidal pinwheel reducer; 40. Integrated switch panel; 41. Feed inlet; 42. Fastening buckle; 43. Square screen frame; 44. Magnetic suction plate C; 45. Rubber gasket D; 46. Slip ring; 47. Brush; 48. Wire hole. Detailed Implementation

[0057] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0058] Reference Figures 1 to 10 This embodiment provides an integrated instrument for grinding and automatically sieving mineral samples in the laboratory, including a base. The base is equipped with a transmission and control system, a horizontal ball mill, and a sieving device. The horizontal ball mill is connected to the sieving device, and the transmission and control system is connected to the horizontal ball mill and the sieving device.

[0059] In this embodiment, the transmission control system mainly consists of a three-phase asynchronous motor 11, a cycloidal pinwheel reducer 39, a transformer 12, a micro motor 6, and an integrated switch panel 40;

[0060] The three asynchronous motors 11 provide power for the rolling of the horizontal ball mill, and the drive shaft of the three asynchronous motors 11 is connected to the cycloidal pinwheel reducer 39;

[0061] The cycloidal pinwheel reducer 39 is used to reduce the speed of the drive shaft of the three-phase asynchronous motor 11, so as to avoid the horizontal ball mill speed being too high, and at the same time alleviate the large torque of the horizontal ball mill on the three-phase asynchronous motor 11.

[0062] The transformer 12 ( Figure 10 The T) provides the necessary low-voltage power supply for the instrument’s related components (such as the positive pressure high-speed blower 18 of the horizontal ball mill, the micro motor 6 of the sieving device, and the negative pressure high-speed blower 9);

[0063] The micro motor 6 provides power to the four-axis brush 7 inside the screening device and controls its rotation speed;

[0064] The integrated switch panel 40 is used to control the start and stop of the instrument, as well as the timely start and stop of related functions of related components of the instrument.

[0065] In this embodiment, the horizontal ball mill is mainly composed of a high-strength wear-resistant steel tank 21, steel balls 23, feed inlet 41, feed inlet cover 22, fastening buckle 42, cylindrical hollow shaft 17, baffle mesh, rolling bearing, and positive pressure high-speed blower 18.

[0066] The horizontal ball mill uses a high-strength wear-resistant steel tank 21 to improve its service life; the feed inlet 41 is located at the center of the high-strength wear-resistant steel tank 21 and is used to add steel balls 23 and pour in ore blocks at regular intervals; the horizontal ball mill is mainly used to drive the steel balls 23 in the tank to grind the ore.

[0067] The feed inlet 41 is cylindrical and protrudes slightly from the surface of the high-strength wear-resistant steel tank 21.

[0068] The feed inlet cover 22 is used to close the feed inlet 41, and the inner side of the feed inlet cover 22 is equipped with a rubber gasket to facilitate better sealing of the high-strength wear-resistant steel tank 21;

[0069] The fastening buckle 42 is used to fix the feed port cover 22 onto the feed port 41;

[0070] The cylindrical hollow shaft 17 is open at one end and closed at the other end. The open end is connected to the high-strength wear-resistant steel tank body 21 through a flange, and the closed end is connected to the reducer drive shaft 13 through screws.

[0071] The material blocking mesh consists of two pieces (material blocking mesh A 20 and material blocking mesh B 24), which are respectively installed on the side of the cylindrical hollow shaft inside the high-strength wear-resistant steel tank 21 and on the side of the screening device. Their main function is to prevent larger particles of ore and steel balls inside the high-strength wear-resistant steel tank 21 from entering the cylindrical hollow shaft or the screening device during the rotary grinding process.

[0072] There are two rolling bearings, namely a small-diameter rolling bearing (bearing A 19) and a large-diameter rolling bearing (bearing B 25). The outer ring of the small-diameter rolling bearing is fixed to the base, and the inner ring is fixed to the cylindrical hollow shaft 17. The outer ring of the large-diameter rolling bearing is fixed to the base, and the inner ring is fixed to the high-strength wear-resistant steel tank body 21.

[0073] The positive pressure high-speed blower 18 is located inside the cylindrical hollow shaft 17 and is used to blow high-speed airflow (20m / s-100m / s) into the high-strength wear-resistant steel tank 21. The airflow carries the fine mineral powder into the screening device for classification. The closed end of the cylindrical hollow shaft 17 is provided with a vent hole 14 to facilitate the introduction of airflow.

[0074] In this embodiment, the power supply line of the positive pressure high-speed blower 18 is connected through the wire hole 48. Its line is fixed outside the cylindrical hollow shaft 17 and connected to the slip ring 46 on the reducer transmission shaft 13. One side of the brush 47 is fixed to the housing of the cycloidal pinwheel reducer 39, and the graphite side of the brush is in contact with the slip ring 46. In this way, the current is guided from the fixed part (electric control system end) to the rotating part (cylindrical hollow shaft 17 of the horizontal ball mill), ensuring that the positive pressure high-speed blower 18 is supplied with current during the operation of the horizontal ball mill.

[0075] In this embodiment, the screening device mainly consists of a stainless steel grading screening tank 29, a top cover plate 27, a pull-out sealing plate 32, a sample collection funnel, a conical filter 10, a four-axis brush, a square screen 26, a circular screen 38, a negative pressure high-speed blower 9, a screen groove 35, a magnetic suction plate, and a rubber gasket.

[0076] The stainless steel grading and screening tank 29 mainly consists of three parts. The upper part is a cuboid, which is formed by welding and assembling four stainless steel plates to form a side tank body, specifically including three screening sections. An opening is made on the side near the horizontal ball mill, and an intermediate cylinder is connected to it through a flange and rubber gaskets (rubber gasket A 31, to increase the sealing of the connection). The intermediate cylinder is fixedly installed on the base and communicates with the horizontal ball mill. A rubber gasket is installed between the intermediate cylinder and the rolling bearing to form a seal. The middle part is an arc-shaped tank bottom 5, which is spliced ​​from four arc-shaped stainless steel plates, one for each screening section. The lower part is a sample collection funnel, used to collect the ground mineral powder, one for each screening section. The upper, middle and lower parts of the stainless steel grading and screening tank 29 are all welded together to form a whole. The upper part of the stainless steel grading and screening tank 29 has 6 pairs of magnetic plates (magnetic plates B 36), which are fixed to the outer edge of the upper part of the cuboid tank body.

[0077] The upper cover plate 27 is a cuboid with protruding strips on three sides, used to seal the stainless steel grading screening tank 29. Rubber gaskets (rubber gaskets C 37) are glued to the inner four sides and the upper part of the corresponding square screen inside the tank to facilitate sealing of the stainless steel grading screening tank and the three-stage screening area inside the tank. Six pairs of magnetic plates (magnetic plates A 28) are attached to the inner sides of the two protruding strips of the upper cover plate, which are opposite to the six pairs of magnetic plates NS grade on the upper part of the stainless steel grading screening tank. The upper cover plate 27 and the stainless steel grading screening tank 29 are fixed by magnetic attraction, which is convenient for disassembly and installation.

[0078] The pull-out sealing plate 32 is located at the top of the upper end 3 of the sample collection funnel and is fixed by a groove. It can be opened and closed by a pull-out method to connect with the arc-shaped bottom 5 of the stainless steel grading and screening tank 29. Rubber gaskets (rubber gasket B 34) are bonded to its four sides to increase the sealing of the connection.

[0079] The upper end 3 of the sample collection funnel is a cube, the middle end 2 of the sample collection funnel is a frustum cavity with the same width and diameter as the cube, and the lower end 1 of the sample collection funnel is a cylindrical discharge port 33, and the cylindrical discharge port 33 has a ring of protruding strips to facilitate the binding of the sample bag on the cylindrical discharge port 33.

[0080] The conical filter 10 is located in the rectangular tank of the last stage of the stainless steel grading and screening tank 29, and is used to prevent the last stage of mineral powder from entering the negative pressure high-speed blower 9 with the airflow.

[0081] There are two quadrilateral brushes 7, located in the primary screening zone and the secondary screening zone respectively. They are fixed on the drive shaft of the micro motor 6 and powered by the micro motor. The quadrilateral brushes 7 consist of two pairs of axisymmetric brushes. Their main function is to continuously throw the mineral sample deposited on the pull-out sealing plate 32 onto the square screen 26 during the screening process. At the same time, they generate turbulent flow and vibration in the void area in the stainless steel grading screening tank 29, which improves the screening efficiency of mineral powder and can effectively avoid incomplete grading.

[0082] The circular screen 38 is located at the inlet end of the stainless steel grading and screening tank 29 and is the first grading screen. Rubber gaskets are bonded to the four sides of the circular screen 38 to increase the sealing of the connection parts.

[0083] The square screen 26 consists of two pieces, located inside the stainless steel grading and screening tank 29, which are the second and third grading screens, respectively. The stainless steel grading and screening tank 29 is evenly divided into three equal spaces of the same size, which is the three-stage screening process.

[0084] The square screen 26 can be selected with different apertures, such as -200 mesh or -400 mesh, according to actual needs; rubber gaskets (rubber gasket D 45) and magnetic suction plates (magnetic suction plates C 44) are bonded to the square screen frame 43 to increase the sealing between the three screening spaces of the stainless steel grading screening tank and prevent ungraded mineral powder particles from entering the next screening space from the outer edge of the screen;

[0085] The screen groove 35 is located in the upper rectangular tank of the stainless steel grading and screening tank 29, at the connection part with the horizontal ball mill, at one-third and two-thirds of the location, and is used to fix the circular screen 38 and the square screen 26.

[0086] The negative pressure high-speed blower 9 is fixed to the end of the stainless steel grading and screening tank 29 by bolts, providing negative pressure airflow for the screening device and power airflow for mineral powder grading.

[0087] In this embodiment, the base mainly consists of a cast steel base 16, a supporting vertical beam 15, and a horizontal beam 8;

[0088] The cast steel base 16 mainly provides a flat support surface for the instrument;

[0089] The supporting vertical beams 15 are in four pairs, and are fixed to the long side of the cast steel base 16 by bolts in pairs.

[0090] The crossbeam 8 fixes the various components of the instrument to the supporting vertical beam 15.

[0091] This embodiment also provides a method for using the above-mentioned integrated laboratory mineral sample grinding and automatic sieving instrument, including the following steps:

[0092] (1) Open the fastening buckle 42, pour the ore into the high-strength wear-resistant steel tank 21, and tighten the fastening buckle 42;

[0093] (2) Take three sample bags and put the cylindrical outlet 33 into the sample bags until the convex strip is submerged. Tie the sample bags to the cylindrical outlet 33 with a rope or rubber band.

[0094] (3) Turn on the main switch (K) and the horizontal ball mill control switch (K1) in sequence, and the horizontal ball mill will start working;

[0095] (4) Turn on the control switch (K3) of the positive pressure high-speed blower 18. The positive pressure high-speed blower 18 starts to work and blows the mineral powder ground to a certain fineness into the screening device. The speed of the positive pressure high-speed blower 18 can be controlled by adjusting the resistance (R1). The speed can be flexibly adjusted according to the amount of sample in this experiment.

[0096] (5) Turn on the control switch (K4) of the negative pressure high-speed blower 9 and the control switch (K2) of the four-axis brush 7 in sequence. The sieving device will start working. The speed of the negative pressure high-speed blower 9 can be controlled by adjusting the resistance (R2). The speed can be flexibly adjusted according to the number of samples in this experiment.

[0097] (6) After the grading is completed, turn off the horizontal ball mill control switch (K1), the negative pressure high-speed blower 9 control switch (K4), the positive pressure high-speed blower 18 control switch (K3), the four-axis brush 7 control switch (K2), and the main switch (K) in sequence.

[0098] (7) Pull out the sealing plate 32 by pulling the handle 4 of the sealing plate. The mineral powder enters the sample bag through the sample collection funnel. The experiment ends here.

[0099] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A laboratory-grade integrated instrument for grinding and automatically sieving mineral samples, characterized in that: The system includes a base on which a transmission and control system, a horizontal ball mill, and a screening device are mounted. The horizontal ball mill is connected to the screening device, and the transmission and control system is connected to both the horizontal ball mill and the screening device. The horizontal ball mill mainly consists of a high-strength wear-resistant steel tank, steel balls, a feed inlet, a feed inlet cover, fastening buckles, a cylindrical hollow shaft, a baffle screen, rolling bearings, and a positive pressure high-speed blower. The screening device mainly consists of a stainless steel grading screening tank, a top cover, a pull-out sealing plate, a sample collection funnel, a conical filter, a four-axis brush, a square screen, a circular screen, a negative pressure high-speed blower, screen grooves, and rubber gaskets.

2. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 1, characterized in that: The transmission and control system mainly consists of a three-phase asynchronous motor, a cycloidal pinwheel reducer, a transformer, a micro motor, and an integrated switch panel; The three asynchronous motors provide power for the rolling motion of the horizontal ball mill, and the drive shafts of the three asynchronous motors are connected to the cycloidal pinwheel reducer. The cycloidal pinwheel reducer is used to reduce the speed of the drive shaft of the three-phase asynchronous motor; The transformer provides the necessary low-voltage power to the instrument's related components; The micro motor provides power to the four-axis brush inside the screening device and controls its rotation speed; The integrated switch panel is used to control the start and stop of the instrument, as well as the timely activation and deactivation of related functions of the instrument's components.

3. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 2, characterized in that: The feed inlet is located at the center of the high-strength wear-resistant steel tank and is used to add steel balls and pour in ore blocks at regular intervals. The feed inlet cover is used to close the feed inlet, and the inner side of the feed inlet cover is equipped with a rubber gasket to facilitate sealing of the high-strength wear-resistant steel tank. The fastening buckle is used to fix the feed port cover onto the feed port; The cylindrical hollow shaft is open at one end and closed at the other end. The open end is connected to the high-strength wear-resistant steel tank body through a flange, and the closed end is connected to the reducer drive shaft through screws. The baffle mesh consists of two pieces, which are respectively installed on the side of the cylindrical hollow shaft inside the high-strength wear-resistant steel tank and on the side of the screening device. There are two rolling bearings, namely a small-diameter rolling bearing and a large-diameter rolling bearing. The outer ring of the small-diameter rolling bearing is fixed to the base, and the inner ring is fixed to the hollow cylindrical shaft. The outer ring of the large-diameter rolling bearing is fixed to the base, and the inner ring is fixed to the high-strength wear-resistant steel tank. The positive pressure high-speed blower is located inside the cylindrical hollow shaft and is used to blow high-speed airflow into the high-strength wear-resistant steel tank. The airflow carries the fine mineral powder into the screening device for classification. The closed end of the cylindrical hollow shaft is provided with a vent hole.

4. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 3, characterized in that: The feed inlet is cylindrical and protrudes from the surface of the high-strength wear-resistant steel tank.

5. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 3, characterized in that: The power supply line of the positive pressure high-speed blower is connected through a wire hole. The line is fixed outside the cylindrical hollow shaft and connected to the slip ring on the reducer drive shaft. One side of the brush is fixed to the housing of the cycloidal pinwheel reducer, and the graphite side of the brush contacts the slip ring. In this way, the current is guided from the fixed part to the rotating part, ensuring that the positive pressure high-speed blower is supplied with current during the operation of the horizontal ball mill.

6. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 3, characterized in that: The stainless steel grading and screening tank mainly consists of three parts. The upper part is a cuboid, formed by welding and assembling four stainless steel plates to form the side tank body, specifically including three screening sections. An opening is made on the side closest to the horizontal ball mill, and an intermediate cylinder is connected to it via flanges and rubber gaskets. The intermediate cylinder is fixedly installed on the base and communicates with the horizontal ball mill. A rubber gasket is installed between the intermediate cylinder and the rolling bearing to form a seal. The middle part is an arc-shaped tank bottom, spliced ​​from four arc-shaped stainless steel plates, one for each screening section. The lower part is a sample collection funnel, one for each screening section. The upper, middle, and lower parts of the stainless steel grading and screening tank are all welded together to form a whole. The upper cover is a cuboid with protruding strips on three sides, used to seal the stainless steel grading and screening tank. Rubber gaskets are glued to the inside perimeter and the upper part of the corresponding square screen inside the tank to facilitate sealing the stainless steel grading and screening tank and the three-stage screening area inside the tank. The pull-out sealing plate is located at the top of the upper end of the sample collection funnel and is fixed by a groove. It can be opened and closed by a pull-out method to connect with the arc-shaped bottom of the stainless steel grading and screening tank. Rubber gaskets are bonded to its four sides to increase the sealing of the connection. The conical filter is located inside the rectangular tank of the last stage of the stainless steel grading and screening tank, in order to prevent the last stage of mineral powder from entering the negative pressure high-speed blower with the airflow. There are two quadrilateral brushes, located in the primary screening zone and the secondary screening zone respectively, fixed on the drive shaft of the micro motor and powered by the micro motor. The circular screen is located at the inlet end of the stainless steel grading and screening tank and is the first grading screen. Rubber gaskets are bonded to the four sides of the circular screen to increase the sealing of the connection parts. The square screen consists of two pieces, located inside the stainless steel grading and screening tank, serving as the second and third grading screens, which evenly divide the stainless steel grading and screening tank into three equal spaces of the same size. The screen grooves are located in the upper rectangular tank of the stainless steel grading and screening tank, at the connection point with the horizontal ball mill, at one-third and two-thirds of the tank, and are used to fix the circular screen and the square screen. The negative pressure high-speed blower is fixed to the end of the stainless steel grading and screening tank by bolts, providing negative pressure airflow for the screening device and power airflow for mineral powder grading.

7. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 6, characterized in that: The stainless steel grading and screening tank has 6 pairs of magnetic plates on the upper part, which are fixed to the outer edge of the upper part of the cuboid tank. The upper cover plate has 6 pairs of magnetic plates attached to the inner side of the two protruding strips, which are opposite to the 6 pairs of magnetic plates on the upper part of the stainless steel grading and screening tank. The upper cover plate and the stainless steel grading and screening tank are fixed by magnetic attraction.

8. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 6, characterized in that: The upper end of the sample collection funnel is a cube, the middle end of the sample collection funnel is a frustum cavity with the same width and diameter as the cube, and the lower end of the sample collection funnel is a cylindrical discharge port with a raised strip around it.

9. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 6, characterized in that: The square screen can be selected with different aperture sizes according to actual needs; rubber gaskets and magnetic plates are glued to the square screen frame to facilitate the sealing between the three screening spaces of the stainless steel grading screening tank.

10. The laboratory mineral sample grinding and automatic sieving integrated instrument according to claim 1, characterized in that: The base is mainly composed of a cast steel base, supporting vertical beams, and horizontal beams; The cast steel base primarily provides a flat support surface for the instrument; There are four pairs of supporting vertical beams, which are fixed to the long side of the cast steel base by bolts in pairs; The crossbeam secures the various components of the instrument to the supporting vertical beam.

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