A new type of ball mill grinding and crushing system

Abstract

The application discloses a novel ball mill grinding and crushing system and relates to the technical field of ball mill crushing equipment.The ball mill grinding and crushing system comprises a soundproof machine room, a ball mill is arranged in the soundproof machine room, the ball mill comprises a barrel, feeding mechanisms and discharging mechanisms are arranged at the two ends of the barrel respectively, the discharging mechanism comprises a material receiving cover, a dust removal air inlet pipe is fixedly connected to the top of the material receiving cover, a bag-type dust collector is fixedly installed at the top of the soundproof machine room, the bag-type dust collector comprises an ash bucket bin, and one end of the dust removal air inlet pipe is fixedly connected to one side of the ash bucket bin.The suction of the air separation fan forms a negative pressure, the barrel discharges the material and air to the bag-type dust collector, the material with the required granularity in the ball mill is separated in time by using the principle of air classification, the material is not overground, the product granularity distribution is narrowed, and the purpose of reducing the energy consumption of the ball mill and improving the product quality is achieved.

Description

Technical Field

[0001] This invention relates to the field of ball mill grinding equipment technology, specifically a novel ball mill grinding and pulverizing system. Background Technology

[0002] Ball mills are key equipment for the initial crushing and further pulverization of large-shaped materials. They are made by loading a certain amount of grinding media into the cylinder to grind and pulverize various ores and other grindable materials. They are widely used in ore processing, cement, silicate products, new building materials, refractory materials, fertilizers, non-ferrous metal beneficiation, glass, ceramic and magnetic material processing, building materials and chemical industries.

[0003] Existing dry ball mills commonly used in the magnetic industry typically control the fineness of materials by increasing grinding time. The material moves within the mill through friction between the grinding media and the material, pushing it towards the discharge end. This method is not only inefficient but also results in already finely ground material continuing to be ground, occupying mill space, causing uneven particle size distribution, and unstable product quality. Therefore, how to improve existing ball mills to overcome these shortcomings is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a novel ball mill grinding and pulverizing system to solve the problem mentioned in the background art of the prior art where the ball mill continues to grind the already finely ground material, occupying the ball mill space and causing uneven particle size distribution.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A novel ball mill grinding and pulverizing system includes a soundproof machine room, inside which a ball mill is installed. The ball mill includes a cylinder, one end of which is designated as a feeding end and the other end as a discharging end. A receiving hood is provided on one side of the discharging end, and a dust removal air inlet pipe is fixedly connected to the top of the receiving hood.

[0007] A baghouse dust collector is fixedly installed on the top of the soundproof room. The baghouse dust collector includes a housing with several ash hoppers below it. One end of the dust collection inlet pipe is fixedly connected to one side of each ash hopper. A dust collection outlet pipe is fixedly connected to one side of the housing. One end of the dust collection outlet pipe is fixedly connected to an air classifier fan. An electric actuator for controlling the airflow is installed between the air classifier fan and the dust collection outlet pipe. The outlet of the air classifier fan is fixedly connected to the fan outlet pipe. A feeding and packaging mechanism is installed below the baghouse dust collector. A negative pressure controller is fixedly installed in the middle of the dust collection inlet pipe.

[0008] The cylinder is divided into a front silo and a rear silo. A docking turntable is fixedly connected to the end of the front silo near the rear silo and the end of the rear silo near the front silo. The two docking turntables are rotatably connected to each other, thereby enabling the front silo and the rear silo to be rotatably connected. A support component is provided at the junction of the front silo and the rear silo. The support component is used to support the front silo and the rear silo to improve the stability of the cylinder as a whole during the rotation process.

[0009] A middle silo plate is fixedly connected to one end of the inner wall of the front silo near the rear silo. Several material passage mesh holes are opened in the middle of the middle silo plate. The inner cavity of the material passage mesh holes is inclined. A receiving plate is fixedly connected to one end of the inner wall of the rear silo near the front silo. Several material guide ports are opened in the middle of the receiving plate. A guide plate is fixedly connected to the inner wall of each of the several guide ports. The guide plate is inclined.

[0010] Two sets of drive mechanisms are provided below the cylinder body. The two sets of drive mechanisms are used to drive the front silo and the rear silo respectively. The drive mechanisms are implemented using existing technology and include structures such as drive motors, reduction gears and transmission shafts. The outer walls of the front silo and the rear silo are provided with gear rings. Power is connected to the gears of the drive mechanism through the meshing of the gear rings to realize the driving of the front silo and the rear silo.

[0011] As a further aspect of the present invention: a cooling mechanism is provided in the middle of the front silo and the middle of the rear silo. The cooling mechanism includes a water guide channel. Several water guide cavities are opened on both sides of the inner wall of the water guide channel. One side of each of the water guide cavities is connected to the outer wall of the cylinder to form a drainage hole. A sealing cover plate is rotatably connected to the inner wall of the water guide channel. A water inlet pipe is fixedly connected to the top of the sealing cover plate. One end of the water inlet pipe is fixedly connected to the output end of an external water pump.

[0012] As a further embodiment of the present invention: the feeding and packaging mechanism includes a conveying pipe, one end of which is fixedly installed with a conveying auger, a plurality of receiving pipes are fixedly connected to the top of the conveying pipe, a discharge pipe is fixedly installed at the bottom of each of the plurality of ash hoppers, a sealing discharge valve is fixedly installed in the middle of the discharge pipe, the plurality of receiving pipes are respectively arranged corresponding to the bottom of the plurality of discharge pipes, a packaging butterfly valve is fixedly installed at one end of the receiving pipe, and a ton bag packaging machine is arranged below the packaging butterfly valve.

[0013] As a further embodiment of the present invention: the central storage plate is divided into eight sub-plates, the eight sub-plates surround to form a disc shape with a through hole in the middle, and a plug is fixedly installed on the inner wall of the through hole.

[0014] As a further aspect of the present invention: steel balls are placed in the front silo, and steel columns are placed in the rear silo.

[0015] As a further aspect of the present invention: the supporting component includes a base, the top of the base is fixedly connected to a support frame, and the inner wall of the support frame is rotatably connected to a plurality of supporting rollers, the plurality of supporting rollers being divided into two groups, each group of supporting rollers being correspondingly arranged with the bottom of a docking plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention creates negative pressure through the suction action of the air classifier fan, drawing material and air from the discharge end of the cylinder into the bag filter. Utilizing the principle of wind-based classification, the material that has reached the required particle size after grinding within the ball mill is promptly separated, achieving over-grinding and narrowing the product particle size distribution, thereby reducing ball mill energy consumption and improving finished product quality. Under the combined action of the rotation of the front silo and the air suction, the material moves spirally along the inner wall of the front silo towards the rear silo at a certain angle. This application improves the smoothness of material passage by tilting the inner cavity of the material passage mesh.

[0017] This invention divides the cylinder into a front chamber and a rear chamber, and drives and controls them separately with two sets of drive mechanisms, so that the rotation speed and rotation direction of the front chamber and the rear chamber can be adjusted independently, which can better adapt to the actual grinding needs during use.

[0018] This invention uses a cooling mechanism to cool the ball mill by introducing cooling water through a water guide channel and guiding it through several water guide cavities, allowing it to move along the inside of the cylinder. This cools the cylinder and prevents the temperature rise from affecting the grinding effect of the ball mill. Attached Figure Description

[0019] Figure 1 This is a front view of the present invention;

[0020] Figure 2 This is a cross-sectional view of the cylinder of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the silo plate in this invention;

[0022] Figure 4 This is a schematic diagram showing the tilt angle of the mesh openings in this invention;

[0023] Figure 5 This is a schematic diagram of the structure of the receiving plate of the present invention;

[0024] Figure 6 This is a cross-sectional view of the cooling mechanism of the present invention;

[0025] Figure 7 This is a normal distribution diagram of the grinding particle size of a commonly used ball mill system;

[0026] Figure 8 This is a normal distribution diagram of the grinding particle size of the present invention.

[0027] In the diagram: 1. Ball mill; 101. Feed end; 102. Front silo; 103. Middle silo plate; 1031. Dividing plate; 1032. Feeding mesh; 1033. Plug; 104. Receiving plate; 1041. Feed guide port; 1042. Feed guide plate; 105. Rear silo; 106. Discharge end; 107. Connecting turntable; 108. Support frame; 109. Supporting roller; 110. Cooling machine Structure; 1101, sealing cover plate; 1102, water guide channel; 1103, water guide cavity; 2, air classifier fan; 3, electric actuator; 4, dust collector exhaust pipe; 5, fan exhaust pipe; 6, housing; 7, ash hopper; 8, sealed unloading valve; 9, dust collector inlet pipe; 10, negative pressure controller; 11, conveying pipe; 12, packaging butterfly valve; 13, ton bag packaging machine; 14, receiving cover; 15, receiving pipe. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-8 In this embodiment of the invention, a novel ball mill grinding and pulverizing system includes a soundproof machine room, inside which a ball mill 1 is installed. The ball mill 1 includes a cylinder, one end of which is set as a feed end 101, and the other end of which is set as a discharge end 106. A receiving hood 14 is provided on one side of the discharge end 106, and a dust removal air inlet pipe 9 is fixedly connected to the top of the receiving hood 14.

[0030] A baghouse dust collector is fixedly installed on the top of the soundproof room. The baghouse dust collector includes a housing 6 (housing a clean air chamber, a filter chamber, pulse valves, an air manifold, a blower pipe, a tube sheet, filter bags, and a frame, all implemented using existing technology). Two dust hoppers 7 are located below the housing 6. One end of the dust collection inlet pipe 9 is fixedly connected to one side of each of the two dust hoppers 7. A dust collection outlet pipe 4 is fixedly connected to one side of the housing 6. One end of the dust collection outlet pipe 4 is fixedly connected to an air classifier fan 2. The air classifier fan 2... An electric actuator 3 for controlling airflow is installed between the dust removal outlet duct 4 and the outlet of the air classifier 2 is fixedly connected to the air outlet duct 5. A negative pressure is created by the suction action of the air classifier 2, drawing material and air from the discharge end 106 of the cylinder into the bag filter. Utilizing the principle of wind-driven classification, the material that has reached the required particle size after grinding within the ball mill 1 is promptly separated, achieving over-grinding of materials and narrowing of product particle size distribution. This reduces the energy consumption of the ball mill 1 and improves the quality of the finished product. Please refer to [link to relevant documentation]. Figures 7-8In comparison, it can be seen that the normal distribution of grinding particle size in the present invention is narrowed, and the particle size distribution is uniform and concentrated.

[0031] A feeding and packaging mechanism is installed at the bottom of the bag filter; a negative pressure controller 10 is fixedly installed in the middle of the dust collection inlet pipe 9; the negative pressure controller 10 detects the negative pressure of the dust collection inlet pipe 9 and outputs it to the control system to control the electric actuator 3 to control the opening of the sorting fan, thereby adjusting the air volume of the air classifier fan 2 to meet the need for continuous material suction.

[0032] Please see Figure 2 The cylinder is divided into a front silo 102 and a rear silo 105. The front silo 102 contains steel balls, which are cast steel balls of ø90, ø80, ø50, ø40 and ø30 added in proportion. The rear silo 105 contains steel columns, which are Ø25×30, Ø30×35, Ø20×25 and Ø16×18 added in proportion.

[0033] Two sets of drive mechanisms are arranged at the bottom of the cylinder. The two sets of drive mechanisms are used to drive the front cylinder 102 and the rear cylinder 105 respectively. The drive mechanisms are implemented using existing technology and include structures such as drive motors, reduction gears and transmission shafts. The outer walls of the front cylinder 102 and the rear cylinder 105 are provided with gear rings. Power is connected to the gears of the drive mechanism through the meshing of the gear rings to drive the front cylinder 102 and the rear cylinder 105. Since the two sets of drive mechanisms are set independently, the drive of the front cylinder 102 and the rear cylinder 105 can be performed separately. The rotation speed and rotation direction of the front cylinder 102 and the rear cylinder 105 can be controlled independently, so that the rotation speed of the two cylinders can be adjusted according to the actual grinding needs during use.

[0034] A docking turntable 107 is fixedly connected to one end of the front silo 102 near the rear silo 105 and the other end of the rear silo 105 near the front silo 102. The two docking turntables 107 are rotatably connected to each other, thereby enabling the front silo 102 and the rear silo 105 to be rotatably connected. A support component is provided at the junction of the front silo 102 and the rear silo 105. The support component is used to support the front silo 102 and the rear silo 105 to improve the overall stability of the cylinder during the rotation process.

[0035] The support assembly includes a base, and a support frame 108 is fixedly connected to the top of the base. Several support rollers 109 are rotatably connected to the inner wall of the support frame 108. The several support rollers 109 are divided into two groups. Each group of support rollers 109 is correspondingly set to the bottom of a docking plate, so as to support and accommodate the rotation needs of the two cylinders in different directions and at different speeds.

[0036] Please see Figure 3A middle silo plate 103 is fixedly connected to one end of the inner wall of the front silo 102 near the rear silo 105. Several material passage mesh holes 1032 are opened in the middle of the middle silo plate 103. The inner cavity of the material passage mesh holes 1032 is inclined at 10 degrees, and the inclination direction is biased towards the rotation direction of the front silo 102. Figure 4 As shown, Figure 4 This is a top view of the cross-section of the middle silo plate 103. In the figure, a is the inclination direction of the material passage mesh 1032, and b is the direction of material movement during operation. Under the combined action of the rotation of the front silo 102 and the air suction, the material moves spirally along the inner wall of the front silo 102 towards the rear silo 105 at a certain angle. By tilting the inner cavity of the material passage mesh 1032, the smoothness of material passage is improved.

[0037] The central panel 103 is divided into eight sub-panels 1031. The eight sub-panels 1031 are arranged to form a disc with a through hole in the middle. A plug 1033 is fixedly installed on the inner wall of the through hole. The plug 1033 is used to connect and fix each sealing plate and to seal the middle.

[0038] Please see Figure 5 A receiving plate 104 is fixedly connected to one end of the inner wall of the rear silo 105 near the front silo 102. Several guide ports 1041 are opened in the middle of the receiving plate 104. Guide plates 1042 are fixedly connected to the inner walls of the several guide ports 1041. The guide plates 1042 are inclined. By setting the guide plates 1042, the middle silo plate 103 is supported, improving the positional structural stability of the middle silo plate 103 and assisting in the separation of grinding media (steel balls and steel columns) in the two silos. By setting the guide plates 1042 inclined, the material is guided and its reverse flow is blocked. The inclination direction of the guide plates 1042 satisfies that the airflow direction generated during its rotation is consistent with the air extraction direction of the dust removal air inlet pipe 9, thereby providing a certain suction force to clean the material blocked in the material passage mesh 1032 and assist the material to move towards the discharge end 106.

[0039] Please see Figure 1 Cooling mechanisms 110 are provided in the middle of the front silo 102 and the middle of the rear silo 105. Each cooling mechanism 110 includes a water guide trough 1102. (See also...) Figure 6 Several water guiding chambers 1103 are provided on both sides of the inner wall of the water guiding channel 1102. One side of each water guiding chamber 1103 is connected to the outer wall of the cylinder to form a drainage hole. A sealing cover plate 1101 is rotatably connected to the inner wall of the water guiding channel 1102. A water inlet pipe is fixedly connected to the top of the sealing cover plate 1101. One end of the water inlet pipe is fixedly connected to the output end of an external water pump. Cooling water is sent into the water guiding channel 1102 through a cooling mechanism 110 and guided by several water guiding chambers 1103. The water flows along the inside of the cylinder to cool the cylinder, thereby avoiding the impact of temperature rise on the grinding effect of the ball mill 1.

[0040] Please see Figure 1 The feeding and packaging mechanism includes a conveying pipe 11, with a conveying auger fixedly installed at one end of the conveying pipe 11. Two receiving pipes 15 are fixedly connected to the top of the conveying pipe 11. Discharge pipes are fixedly installed at the bottom of several ash hoppers 7. Sealed discharge valves 8 are fixedly installed in the middle of the discharge pipes. Several receiving pipes 15 are respectively set at the bottom of several discharge pipes. The two sealed discharge valves 8 automatically discharge material and do not open at the same time, discharging material separately to ensure that the entire ball mill system is in a negative pressure state. The material is conveyed by pushing the conveying auger. A packaging butterfly valve 12 is fixedly installed at one end of the receiving pipe 15. A ton bag packaging machine 13 is set below the packaging butterfly valve 12. The feeding speed is controlled by the packaging butterfly valve 12, and the ton bag packaging machine 13 receives and packages the material.

[0041] In use, the material to be ground is fed into the cylinder of the ball mill 1 through the feed end 101 and received by the front hopper 102. The drive mechanism is started to drive the front hopper 102 and the rear hopper 105 to rotate. The rotation speed is adjusted so that the grinding media and material are carried to a certain height and then fall down in a parabolic trajectory. At this time, the steel balls and steel columns have a large impact on the material, resulting in a better crushing effect.

[0042] Simultaneously, the air classifier 2 starts, and the dust removal inlet pipe 9 draws air to generate negative pressure, which drives the material in the cylinder to move towards the discharge end 106. The material passes through the material passage mesh 1032 on the middle silo plate 103 and the guide hole on the receiving plate 104 in sequence from the front silo 102, and then enters the rear silo 105 and then enters the dust removal inlet pipe 9 from the discharge end 106. It then moves along the dust removal inlet pipe 9 to the ash hopper 7 of the bag filter, where the bag filter starts to remove dust. The material that has been dusted falls from the discharge pipe to the receiving pipe 15, and then the conveying auger starts to transport the material to the ton bag packaging machine 13 for packaging.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A novel ball mill grinding and pulverizing system, comprising a soundproof machine room, wherein a ball mill (1) is installed inside the soundproof machine room, the ball mill (1) comprising a cylinder, characterized in that, The discharge end (106) of the cylinder is provided with a receiving cover (14), and the top of the receiving cover (14) is fixedly connected to a dust removal air inlet pipe (9); a bag dust collector is fixedly installed on the top of the soundproof machine room. The bag dust collector includes a box (6), and several ash hoppers (7) are provided below the box (6). One end of the dust removal air inlet pipe (9) is fixedly connected to one side of several ash hoppers (7). A feeding and packaging mechanism is provided below the bag dust collector. A negative pressure controller (10) is fixedly installed in the middle of the dust removal air inlet pipe (9). The negative pressure controller (10) is electrically connected to the electric actuator (3). The cylinder is divided into a front silo (102) and a rear silo (105), which are rotatably connected. A drive mechanism is provided at the bottom of the cylinder to drive the front silo (102) and the rear silo (105). The two drive mechanisms can independently control the rotation speed and direction of the front silo (102) and the rear silo (105). A middle silo plate (103) is fixedly connected to one end of the inner wall of the front silo (102) near the rear silo (105). A number of inclined material passage mesh holes (1032) are opened in the middle of the middle silo plate (103). The inner cavity of the material passage mesh hole (1032) is inclined at 10 degrees and the inclination direction is biased towards the rotation direction of the front silo (102). A receiving plate (104) is fixedly connected to one end of the inner wall of the rear silo (105) near the front silo (102). Several material guide ports (1041) are opened in the middle of the receiving plate (104). An inclined material guide plate (1042) is fixedly connected to the inner wall of each of the material guide ports (1041). The inclination direction of the material guide plate (1042) is such that the airflow direction generated by it during rotation is consistent with the air extraction direction of the dust removal air inlet pipe (9). The feeding and packaging mechanism includes a feeding pipe (11), one end of which is fixedly equipped with a feeding auger. Several receiving pipes (15) are fixedly connected to the top of the feeding pipe (11). Several ash hoppers (7) are fixedly equipped with unloading pipes at their bottoms. A sealing unloading valve (8) is fixedly installed in the middle of the unloading pipe. The two sealing unloading valves (8) are not opened at the same time to maintain the negative pressure of the system. Several receiving pipes (15) are respectively set to correspond to the bottom of several unloading pipes. A packaging butterfly valve (12) is fixedly installed at one end of the receiving pipe (15). A ton bag packaging machine (13) is set below the packaging butterfly valve (12).

2. The novel ball mill grinding and pulverizing system according to claim 1, characterized in that, The front silo (102) contains steel balls, and the rear silo (105) contains steel columns.

3. The novel ball mill grinding and pulverizing system according to claim 1, characterized in that, Cooling mechanisms (110) are provided in the middle of the front silo (102) and the middle of the rear silo (105). The cooling mechanism (110) includes a water guide channel (1102). Several water guide chambers (1103) are opened on both sides of the inner wall of the water guide channel (1102). One side of each of the water guide chambers (1103) is connected to the outer wall of the cylinder to form a drainage hole. A sealing cover plate (1101) is rotatably connected to the inner wall of the water guide channel (1102). A water inlet pipe is fixedly connected to the top of the sealing cover plate (1101).

4. The novel ball mill grinding and pulverizing system according to claim 1, characterized in that, A dust removal air outlet pipe (4) is fixedly connected to one side of the housing (6), and a wind classifier (2) is fixedly connected to one end of the dust removal air outlet pipe (4). An electric actuator (3) for controlling the air volume is provided between the wind classifier (2) and the dust removal air outlet pipe (4), and a fan outlet pipe (5) is fixedly connected to the air outlet of the wind classifier (2).

5. A novel ball mill grinding and pulverizing system according to claim 1, characterized in that, A support assembly is provided at the junction of the front silo (102) and the rear silo (105). The support assembly includes a base, and a support frame (108) is fixedly connected to the top of the base. Several support rollers (109) are rotatably connected to the inner wall of the support frame (108).

6. The novel ball mill grinding and pulverizing system according to claim 1, characterized in that, The central storage plate (103) is divided into eight sub-plates (1031), which together form a disc shape with a through hole in the middle. A plug (1033) is fixedly installed on the inner wall of the through hole.

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