Impact type stirring mill and powder grinding system

Abstract

The present application relates to a kind of impact type stirring mill and powder grinding system, including drum, fixed end plate, impact grinding cavity driving device, stirring grinding shell, stirrer and other components.Drum is rotated with horizontal axis, and fixed end plate is fixed at the end of drum.Impact grinding cavity is connected with drum by driving device, and is formed in the inside of drum.Stirring grinding shell is the cylindrical member of axis extension, is fixed to fixed end plate, is equipped with stirring grinding cavity inside, and is equipped with stirring discharge screen hole in lower part.Stirrer is arranged in the inside of stirring grinding shell, and is rotated by stirring grinding driving device.The impact type stirring mill is accurately calculated and designed, has the advantages of separating device, pressurized integrated stirrer, integrated grinding and sorting, etc..Its ventilation device effectively prevents overheating, reduces auxiliary equipment, is suitable for superfine grinding, comprehensively improves performance, efficiency and environmental protection characteristics, and realizes efficient production control.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of powder grinding equipment, and particularly relates to an impact type stirring mill and a powder grinding system. BACKGROUND

[0002] The stirring mill is an important fine grinding equipment and is widely used in the fields of mining, pigments, chemical industry, building materials, medicine, etc. The basic structure thereof includes a driving device, a cylinder, a stirring and grinding cavity rotating shaft, a stirrer and grinding media. The cylinder is usually in a cylindrical structure, the stirrer has multiple forms such as a spiral type, a bar pin type and a disc type, and the grinding media covers spherical media such as steel balls, corundum balls, zirconium balls and natural river sand and pebbles. In operation, the cylinder of the stirring mill is usually static, the driving device drives the stirring and grinding cavity rotating shaft to rotate, and then the stirrer applies power to the grinding media. In this way, the grinding media and the material produce multi-dimensional circular motion and rotation motion, and the effective powder grinding of the material is realized through the effects of extrusion force, shearing force and a small amount of impact force. In the process of particle crushing, the main mode is friction crushing, the extrusion force and the impact force mainly affect the initial crushing effect of the particles, and the shearing force determines the fine grinding efficiency of the particles. Therefore, improving the shearing force between the grinding media is an effective way to improve the fine grinding efficiency.

[0003] The existing ball mill structure is relatively simple and is composed of a cylinder and grinding bodies. In the operation of the ball mill, the rotation of the cylinder causes the grinding bodies to adhere to the cylinder liner under the action of inertia, centrifugal force and friction force, and to fall at a certain height, so as to crush the material under the action of gravity and impact force, thereby realizing the powder grinding of the material. Due to the simple structure of the ball mill and the high reliability of the equipment, the ball mill has been widely used in the industries of building materials, mineral processing, metallurgy, electric power, medicine, food and chemical industry. The ball mill can be divided into dry type and wet type according to the grinding environment, and can be divided into center transmission and edge transmission according to the transmission mode.

[0004] Although the ball mill structure is simple, its grinding principle is mainly single-particle impact crushing, which leads to the problem of low grinding efficiency. In the process of material crushing, a large amount of energy is converted into the potential energy of the lifting of the steel balls and the material, the kinetic energy of the impact between the steel balls and the heat generated during the grinding. According to research data, the energy utilization rate of the ball mill is less than 5%. Since the ball mill mixes coarse and fine materials, the fine powder material meeting the product requirements is prone to agglomeration in the mill, forming a cushion layer. When the liner cushion layer is 0.2 mm, the impact force of the steel balls decreases by 80%. These problems lead to the problems of ball paste and full grinding in the production of the ball mill, so that the ball mill cannot produce normally, and also leads to very high energy consumption in production.

[0005] At present, the specification of the stirring mill is relatively small, and it is in the stage of gradually popularizing and applying. However, there are still a series of problems in the application. The movement degree of the material and medium in the existing stirring mill is weak, the high speed gradient area is limited, and the grinding area is mainly concentrated near the stirrer and near the inner wall of the cylinder, thereby leading to poor grinding effect and low fine grinding efficiency. Since the stirring mill is high-density filling, and under the action of high-speed movement of the stirrer, shearing, crushing and grinding are carried out, the stirring cylinder is easy to overheat, and the heat generation is large, and the cooling of the stirring cylinder becomes one of the key problems restricting the popularization and application of the stirring mill. In addition, the separation effect of the existing stirring mill after grinding is poor, the separation scale is not flexible enough, the control of the product fineness is weak, the qualified products cannot be discharged in time, the local material is seriously overground, the stability of the equipment is reduced, and the large-scale of the equipment is limited. SUMMARY

[0006] In view of the problems of low grinding efficiency, serious overgrinding, unflexible control of the discharge fineness and difficult heat dissipation of the existing ball mill, the application provides an impact type stirring mill and a grinding system.

[0007] The application is implemented in the following manner: an impact type stirring mill, characterized in that: a rotary drum, a fixed end plate, an impact grinding cavity driving device, an impact grinding cavity, a stirring and grinding shell, a stirrer and a stirring and grinding driving device are provided; the rotary drum forms an axis horizontal rotary member; the fixed end plate is fixed and forms an end cover member of the rotary drum; the impact grinding cavity driving device is connected with the rotary drum and drives the rotary drum to rotate; the impact grinding cavity is formed in the inside of the rotary drum; the inside of the stirring and grinding shell is provided with a stirring and grinding cavity, and the stirring and grinding shell is a cylindrical member extending in parallel with the axis of the rotary drum; the stirring and grinding shell is fixed to the fixed end plate and arranged inside the impact grinding cavity, and the lower part of the stirring and grinding shell is provided with a stirring and discharging sieve hole; the stirrer is arranged inside the stirring and grinding shell; and the stirring and grinding driving device is connected with the stirrer and drives the stirrer to rotate.

[0008] In the above technical solution, preferably, the two end portions of the rotary drum are installed with the fixed end plate through impact grinding cavity end cover sliding grooves, the impact grinding cavity end cover sliding grooves are annular grooves, the rotary drum is connected with a seat body supporting the rotary drum, the fixed end plate is provided with an impact grinding cavity feeding port communicating with the impact grinding cavity, and the outer end portion of the stirring and grinding shell is provided with a stirring and grinding cavity feeding port.

[0009] In the above technical solution, preferably, the stirring and grinding shell has two impact grinding chamber screening grates fixed on it. The two impact grinding chamber screening grates are located in the middle of the inner side of the impact grinding chamber. The impact grinding chamber screening grates form a partition component that crosses the impact grinding chamber. A discharge chamber is formed between the two impact grinding chamber screening grates. The rotating drum is provided with an impact grinding chamber discharge hole at the position corresponding to the discharge chamber.

[0010] In the above technical solution, preferably, an annular guide shell is provided on the outer side of the rotating drum, the position of the annular guide shell corresponds to the position of the discharge hole of the impact grinding chamber, the annular guide shell and the rotating drum form an annular guide cavity, the discharge hole of the impact grinding chamber connects the discharge cavity and the annular guide cavity, the lower part of the annular guide cavity is provided with a mill discharge port, and the upper part of the annular guide cavity is provided with a mill air outlet.

[0011] In the above technical solution, preferably, the impact grinding chamber drive device is connected to the rotating drum through an impact grinding sliding drive, the stirring grinding chamber rotating shaft is installed in the stirring grinding housing, N stirrers are arranged axially on the stirring grinding chamber rotating shaft, and the stirring grinding drive device is connected to the stirring grinding chamber rotating shaft through a drive.

[0012] In the above technical solution, preferably, the inner wall of the rotating drum is provided with a circumferential sliding groove for the impact grinding chamber screening grate, and the outer edge of the impact grinding chamber screening grate is combined with the sliding groove for the impact grinding chamber screening grate.

[0013] In the above technical solution, preferably, the stirrer includes a fixed ring arranged radially from the inside to the outside and N stirring rings. The fixed ring fixes the rotating shaft of the stirring and grinding chamber. The stirring rings are evenly provided with multiple through holes along the circumferential direction. Each stirring ring is divided into at least two parts. The stirring rings adjacent to the fixed ring are fixed to the fixed ring by radial bolts.

[0014] In the above technical solution, preferably, the rotating shaft of the stirring and grinding chamber is provided with several grooves along the axial direction and is provided with a rotating shaft shell, the grooves and the rotating shaft shell forming an oil groove; the agitator is provided with several branch oil passages along the radial direction from the center to the outer edge, one end of the branch oil passage is connected to the oil groove of the rotating shaft of the stirring and grinding chamber, and the other end is connected to the inner edge of the outer edge of the agitator; a hydraulic piston and a hydraulic rod are provided in the inner cavity of the branch oil passage, and the hydraulic piston and hydraulic rod slide in the branch oil passage; the outer edge of the agitator is evenly provided and divided into several segments of agitator high-pressure rings, each segment being connected to a corresponding hydraulic rod; the outer edge of the agitator is wrapped by an annular sealing sleeve.

[0015] This invention relates to an impact-type stirred mill, which, through the ingenious arrangement of a stirring and grinding mechanism and an impact grinding mechanism, achieves primary and secondary grinding of materials, and simultaneously allows for graded and graded grinding of materials with different particle sizes. Specifically, this invention has the following advantages and effects:

[0016] 1. Precise Calculation Design: For the same material, considering factors such as grindability, particle size distribution, and moisture content, the key parameters of the stirring and impact grinding mechanisms, such as grinding chamber length, grinding media and filling rate, agitator shape, and grate shape and size, are precisely calculated and designed. This feature helps improve grinding efficiency, reduce grinding energy consumption, and maximize the performance of the mechanism's design structure.

[0017] 2. Separation device controls material fineness: A separation device is installed inside the stirring and grinding mechanism and the impact grinding mechanism to effectively control the fineness of the material in the impact mill and prevent over-grinding. This design allows the grinding and sorting of materials to be completed inside the impact mill, eliminating the need for an external classifier, thereby reducing plant height and floor space, reducing related auxiliary equipment, and saving investment costs.

[0018] 3. Pressurized integrated mixer: The pressurized integrated mixer can apply a certain amount of roller pressure to the grinding cylinder on the side of the mixer according to the characteristics of the material, which enhances the grinding capacity of the stirred mill, improves the shearing force of the mixer and the material crushing potential, and further improves the grinding efficiency of the stirred mill.

[0019] 4. Integrated grinding and sorting: This invention integrates grinding and sorting into one unit, reducing the process flow and improving the system's air consumption efficiency. Compared with traditional circulating systems, the air volume is reduced by 50-70%, thereby reducing the system's air energy consumption.

[0020] 5. Ventilation device to prevent overheating: The impact grinding mechanism is equipped with a ventilation device, which effectively solves the problem of local high temperature that may occur on the outside of the cylinder when grinding materials, so that the cylinder can quickly ventilate and dissipate heat, thus extending its service life.

[0021] 6. Reduced auxiliary equipment: This invention eliminates auxiliary equipment such as elevators, conveying chutes and conveying inclined troughs, reducing potential pollution points such as leaks and spills in the system, reducing disorderly dust emissions, and promoting cleaner production and environmental protection.

[0022] 7. Applicable to ultrafine grinding: This invention is more suitable for grinding ultrafine powders, and can discharge the generated qualified fine powder in time, reduce the over-grinding of materials in the ball mill, save grinding power consumption, and help production enterprises achieve energy conservation and emission reduction.

[0023] 8. Highly efficient production control: This invention can shorten the finished product quality adjustment time, realize real-time adjustment of material quantity and finished product quantity in the ball mill, efficiently control the finished product rate, improve production efficiency, and reduce production costs.

[0024] A second objective of the present invention is to provide a grinding system equipped with the aforementioned impact-type stirred mill. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the impact stirring mill described in this invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the impact stirring mill described in this invention;

[0027] Figure 3 This is a schematic diagram of the stirrer in this invention;

[0028] Figure 4 This is a schematic diagram of the material flow direction of the impact stirring mill described in this invention;

[0029] Figure 5 This is a flow chart of the open-circuit grinding system of the integrated stirred ball mill;

[0030] Figure 6 This is a flow chart of the integrated stirred ball mill circulating grinding system;

[0031] Figure 7 This is a flow chart of a combined dust collector and circulating grinding system for an integrated stirred ball mill.

[0032] Figure 8 This is a flow chart of a combined grinding system for a roller press and agitated ball mill.

[0033] Figure 9 This is a flow chart of a combined grinding system for a vertical mill and a stirred ball mill. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] To address the problems of low grinding efficiency, severe over-grinding, inflexible control of output fineness, and difficulty in heat dissipation in existing ball mills, this invention provides an impact-mixed mill. This impact-mixed mill features precise calculation and design, a separation device to control material fineness, an integrated pressurized agitator, integrated grinding and sorting, a ventilation system to prevent overheating, reduced auxiliary equipment, suitability for ultrafine grinding, and efficient production control, comprehensively improving the performance, efficiency, and environmental characteristics of impact-mixed mills. To further illustrate the structure of this invention, a detailed description is provided below in conjunction with the accompanying drawings:

[0036] Example 1

[0037] Please see Figures 1-4 An impact-type stirred mill includes a rotating drum 1, a fixed end plate 2, an impact grinding chamber drive device 3, an impact grinding chamber 4, a stirring grinding housing 5, a stirrer 6, and a stirring grinding drive device 7. The rotating drum forms a horizontally axially rotating component. The fixed end plate is fixed and forms an end cap component of the rotating drum. The impact grinding chamber drive device is connected to the rotating drum and drives it to rotate. The impact grinding chamber is formed inside the rotating drum. The stirring grinding housing has a stirring grinding chamber inside and is a cylindrical component extending in a direction parallel to the axis of the rotating drum. The stirring grinding housing is fixed to the fixed end plate and located inside the impact grinding chamber. The stirrer is located inside the stirring grinding housing. The stirring grinding drive device is connected to the stirrer and drives it to rotate.

[0038] The impact mill in this technical solution consists of two parts: a stirring grinding mechanism and an impact grinding mechanism. The stirring grinding mechanism mainly comprises a stirring grinding shell, a stirrer, and a stirring grinding drive device; the impact grinding mechanism mainly comprises a rotating drum, a fixed end plate, and an impact grinding chamber drive device. The stirring grinding mechanism is embedded within the impact grinding mechanism, specifically located at an angled upward. The material undergoes primary grinding in the stirring grinding mechanism, and after being ground to a certain fineness, the material passes through a screening grate into the next stage impact grinding mechanism for secondary grinding. The impact grinding mechanism is circular, specifically the impact grinding chamber is cylindrical, filled with a certain amount of grinding media.

[0039] In this embodiment, specifically, the two ends of the rotating drum are connected to the fixed end plate through the sliding groove 8 of the impact grinding chamber end cover. The sliding groove of the impact grinding chamber end cover is annular and located at the end of the inner wall of the rotating drum. The fixed end plate is connected to the rotating drum through the sliding groove of the impact grinding chamber end cover. The fixed end plate is provided with an impact grinding chamber inlet communicating with the impact grinding chamber. The outer end of the stirring grinding shell is provided with a stirring grinding chamber inlet, and the lower part of the stirring grinding shell is provided with a stirring discharge sieve hole. The feature of this structure is its reasonable design, which can realize a reliable connection between the rotating drum, the end cover, and the fixed end plate. The base 9 is connected to the end of the rotating drum through a bearing seat, that is, the end of the rotating drum is supported and installed on the base through a ring bearing, realizing the rotation setting of the rotating drum and the formation of the impact grinding chamber. The impact grinding chamber driving device is a drive motor, which drives the rotating drum through the sliding shoe 10. The drive motor adopts a permanent magnet direct drive or a motor plus a reducer drive method, and drives the impact grinding drum to rotate through the sliding shoe. It is a known rotating component.

[0040] The media filling rate inside the impact grinding chamber is between 30% and 60%, and is adjusted according to the characteristics of different materials. The inner wall of the rotating drum is equipped with grinding liners.

[0041] In this embodiment, the impact-mixed mill is symmetrically arranged, with two feeding ports at each end: one for the grinding chamber of the mixing and grinding mechanism and the other for the grinding chamber of the impact-mixed grinding mechanism. For materials with larger particle sizes, it is preferable to feed them into the grinding chamber of the impact-mixed grinding mechanism; for materials with smaller particle sizes, it is preferable to feed them into the grinding chamber of the mixing and grinding mechanism, thus achieving graded and gradient grinding of materials of different particle sizes.

[0042] Specifically, the mixing and grinding shell has two impact grinding chamber screening grates 11 fixed in place. These two screening grates form a partition component that crosses the impact grinding chamber in the middle of its inner side. A discharge chamber is formed between the two screening grates, and the rotating drum has an impact grinding chamber discharge hole 12 at the corresponding position. In addition, the inner wall of the rotating drum has a circumferential sliding groove for the impact grinding chamber screening grates, ensuring that the impact grinding chamber screening grates engage with the sliding grooves. The aperture of the impact grinding chamber screening grates is 0.6 to 0.8 times the diameter of the grinding media.

[0043] On the outer side, there is a circumferential guide housing 13, whose position corresponds to the discharge port of the impact grinding chamber. The circumferential guide housing and the rotating drum form an annular guide cavity, through which the discharge port of the impact grinding chamber is connected to the annular guide cavity. The lower part of the guide cavity is provided with a mill discharge port 14, and the upper part is provided with a mill air outlet 15.

[0044] The impact grinding mechanism is equipped with an impact grinding chamber screening grate, a discharge port, and an air outlet at its center. Under the rotation of the drive unit, the grinding media and the material after the first grinding in the impact grinding mechanism are ground again. Then, qualified materials are separated through the impact grinding chamber screening grate and enter the elevator for the next sorting device.

[0045] The outer end of the stirring and grinding housing is provided with a stirring and grinding chamber inlet 16. A stirring and grinding chamber rotating shaft 17 is installed in the stirring and grinding housing, and N stirrers are arranged circumferentially on the stirring and grinding chamber rotating shaft. The stirring and grinding drive device is connected to the stirring and grinding chamber rotating shaft for transmission.

[0046] Specifically, the agitators are arranged sequentially and evenly on the rotating shaft of the mixing and grinding chamber. The agitators can be disc-type, rod-type, etc. In this embodiment, the agitator is disc-type and is fixed on the rotating shaft of the mixing and grinding chamber. Multiple through holes 6-1 are evenly arranged along the circumference of the agitator ring. Each agitator ring is divided into two or more parts. The agitator ring adjacent to the fixed ring is fixed to the fixed ring by radial bolts. The larger diameter agitator ring is fixed to the adjacent smaller diameter agitator ring by radial bolts. In the above manner, the fixed ring and the agitator ring are fixedly combined to form a complete agitator, which is convenient for disassembly and maintenance.

[0047] The outer wall of the rotating shaft of the stirring and grinding chamber is provided with several grooves 17-1 and a housing 17-2. The grooves extend axially and are evenly distributed around the outer wall of the rotating shaft. The grooves and the housing together form a closed cavity, which allows hydraulic oil to enter and exit; this cavity can also be called an oil tank. Each agitator has several branch oil passages 6-2 arranged radially from the center outwards, with the branch oil passages located between adjacent agitator rings. One end of each branch oil passage is connected to the oil tank of the rotating shaft, and the other end extends to the inner edge of the outer edge of the agitator. The inner cavity of the branch oil passage contains a hydraulic piston 6-3 and a hydraulic rod 6-4, which can slide freely according to the oil pressure. The outer edge of the agitator is evenly divided into several high-pressure rings 6-5, each connected to a corresponding hydraulic rod, allowing it to move radially with the hydraulic rod. The outer edge of the agitator is wrapped by an annular sealing sleeve 6-6, made of elastic wear-resistant material, which seals the outer edge of the agitator. Specifically, the inner edge of the annular sealing sleeve is in close contact with the outer circumferential surface of the agitator. A centralized hydraulic oil supply station can be installed around the impact mill, connected to an oil tank in the rotating shaft of the grinding chamber via a connecting device. The connecting device can utilize oil pipes and rotary joints. Each agitator distributed on the rotating shaft of the grinding chamber can be connected to this oil tank, forming a continuous oil circuit. The centralized hydraulic oil supply station can apply a certain oil pressure, causing the outer edge of the agitator to apply a certain pressure to the grinding cylinder, thereby enhancing the projected pressure of the ground material. The projected pressure applied to the grinding cylinder is 400~1500kN / m. 2 between.

[0048] The stirring and grinding drive unit is located at one end of the impact mill, arranged horizontally or tilted at a certain angle, preferably 3-10°. The drive unit employs a permanent magnet direct drive or a motor with a reducer. The drive motor is fixed by a bracket at a certain height. The transmission of the stirring and grinding drive unit passes through the fixed end plate at one end of the impact grinding mechanism, and is connected to the rotating shaft of the stirring and grinding chamber via gears or hinges, driving the agitator fixed on the rotating shaft and the grinding media inside the stirring and grinding shell to rotate at high speed. A grinding liner is installed on the inner wall of the stirring and grinding shell. In the stirring and grinding mechanism, the filling rate of the grinding media in the grinding chamber of the stirring and grinding shell is between 60% and 90%, and is adjusted according to the fineness requirements of the finished product and the characteristics of the material.

[0049] In this technical solution, the stirring and grinding mechanism is embedded in the impact grinding mechanism and located at the upper right of the impact grinding mechanism (from the feeding end direction, assuming the impact grinding mechanism cylinder rotates clockwise). This avoids the parabolic trajectory of the material falling from the top to the bottom of the cylinder during the collision, compression, and grinding process with the grinding media in the impact grinding mechanism, thus preventing long-term erosion of the stirring and grinding cylinder and extending its service life.

[0050] Example 2

[0051] An open-flow grinding system for an impact-type stirred mill includes, specifically, such as Figure 5 As shown, in this embodiment, the impact-mixed mill 300 has a first feeding port and a second feeding port on both sides. The first feeding port is connected to the first feeding buffer chamber 100 via a first belt conveyor 200, and the second feeding port is connected to the second feeding buffer chamber 101 via a second belt conveyor 201. The impact-mixed mill has a discharge port at the bottom and an air outlet at the top. It also includes a baghouse dust collector 400, whose inlet is connected to the air outlet of the impact-mixed mill, and whose outlet is connected to the inlet of a fan 500. The fan outlet is connected to a chimney 600. Finished product chute 700 is provided below the discharge port of the impact-mixed mill and below the discharge port of the baghouse dust collector. These are inclined receiving chute troughs used to receive finished products, and the upper finished product chute guides the finished product into the lower finished product chute.

[0052] For materials of different particle sizes, they are fed into the mill through the first and second feed ports respectively, and the materials are ground in different particle sizes to improve grinding efficiency.

[0053] Example 3

[0054] To better control the fineness of the finished product, a dynamic classifier is added to the grinding system to classify the finished product from the impact mill. Qualified finished product is collected by a dust collector, while unqualified material is returned to the mill for further grinding via a buffer bin. Specifically, the discharge port of the impact mill is connected to an elevator 800, which in turn connects to the dynamic classifier 900. The finished product from the impact mill is fed into the dynamic classifier for classification. The dust collection port of the dynamic classifier is connected to a bag filter, the outlet of which is connected to the inlet of a fan, and the outlet of the fan is connected to a chimney. The discharge port of the dynamic classifier is connected to the first feeding buffer bin, through which unqualified material is returned to the mill for further grinding.

[0055] Example 4

[0056] For Example 3, the grinding process was optimized, such as... Figure 7 The air outlet of the impact mixer mill is merged into the air inlet of the dust collector, reducing the number of dust collectors and simplifying the grinding process. The bag dust collector, fan, and chimney connected to the dynamic classifier are shared with the bag dust collector, fan, and chimney connected to the impact mixer mill, forming a single system.

[0057] Example 5

[0058] Impact mill can be combined with roller press for grinding to form a combined grinding system, such as... Figure 8 As shown, the material discharged from the discharge port of the impact mixer mill is introduced into the roller press grinding line by the elevator. The semi-finished material after being ground by the roller press 1100 enters the impact mixer mill for further grinding through the coarse powder discharge port of the dynamic classifier.

[0059] Example 6

[0060] A vertical mill with a capacity of 2000 rpm can replace a roller press. An impact-stirred mill can be combined with a vertical mill to form a combined external circulation grinding system, such as... Figure 9 As shown, the material discharged from the discharge port of the impact mixer mill is introduced into the vertical mill for grinding via an elevator. The semi-finished material after grinding by the vertical mill 2100 enters the impact mixer mill again for further grinding through the coarse powder discharge port of the dynamic classifier.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An impact-type stirred mill, characterized in that... include: Rotating drum, which forms a rotating component with a horizontal axis; A fixed end plate, which is fixed and forms the end cap component of the rotating cylinder; An impact grinding chamber drive device, wherein the impact grinding chamber drive device is connected to the rotating drum and drives the rotating drum to rotate; An impact grinding chamber is formed inside the rotating cylinder; A stirring and grinding housing, wherein the stirring and grinding housing has a stirring and grinding chamber inside, and the stirring and grinding housing is a cylindrical component extending in a direction parallel to the axis of the rotating drum; the stirring and grinding housing is fixed to the fixed end plate and located inside the impact grinding chamber, and the lower part of the stirring and grinding housing is provided with a stirring discharge screen hole; A stirrer, wherein the stirrer is disposed inside the stirring and grinding housing; A stirring and grinding drive device, which is connected to the stirrer and drives the stirrer to rotate; The impact grinding chamber drive device is connected to the rotating drum via an impact grinding sliding drive. The stirring grinding chamber rotating shaft is installed in the stirring grinding housing. N stirring devices are arranged axially on the stirring grinding chamber rotating shaft. The stirring grinding drive device is connected to the stirring grinding chamber rotating shaft via a drive. The inner wall of the rotating drum is provided with a circumferential sliding groove for the impact grinding chamber screening grate, and the outer edge of the impact grinding chamber screening grate is combined with the sliding groove of the impact grinding chamber screening grate. The agitator includes a fixed ring arranged radially from the inside to the outside and N agitating rings. The fixed ring fixes the rotating shaft of the agitation and grinding chamber. The agitating rings are evenly provided with multiple through holes along the circumferential direction. Each agitating ring is divided into at least two parts. The agitating rings adjacent to the fixed rings are fixed to the fixed rings by radial bolts. The stirring and grinding chamber rotating shaft is provided with several grooves along the axial direction and is provided with a stirring and grinding chamber rotating shaft shell. The grooves and the stirring and grinding chamber rotating shaft shell form an oil groove. The agitator is provided with several branch oil passages along the radial direction from the center to the outer edge. One end of the branch oil passage is connected to the oil groove of the stirring and grinding chamber rotating shaft, and the other end is connected to the inner edge of the outer edge of the agitator. The inner cavity of the branch oil passage is provided with a hydraulic piston and a hydraulic rod, which slide within the branch oil passage. The outer edge of the agitator is evenly provided with several segments of agitator high-pressure rings, each segment being connected to a corresponding hydraulic rod. The outer edge of the agitator is wrapped by an annular gap sealing sleeve.

2. The impact-type stirred mill according to claim 1, characterized in that: The fixed end plate is installed at both ends of the rotating drum through the sliding groove of the impact grinding chamber end cover. The sliding groove of the impact grinding chamber end cover is an annular groove. The rotating drum is connected to a seat that supports the rotating drum. The fixed end plate is provided with an impact grinding chamber inlet that communicates with the impact grinding chamber. The outer end of the stirring grinding shell is provided with a stirring grinding chamber inlet.

3. The impact-type stirred mill according to claim 2, characterized in that: The stirring and grinding shell has two impact grinding chamber screening grates fixed on it. The two impact grinding chamber screening grates are located in the middle of the inner side of the impact grinding chamber. The impact grinding chamber screening grates form a partition component that crosses the impact grinding chamber. A discharge chamber is formed between the two impact grinding chamber screening grates. The rotating drum is provided with an impact grinding chamber discharge hole at the position corresponding to the discharge chamber.

4. The impact-type stirred mill according to claim 3, characterized in that: The outer side of the rotating drum is provided with an annular guide shell, the position of which corresponds to the position of the discharge hole of the impact grinding chamber. The annular guide shell and the rotating drum form an annular guide cavity. The discharge hole of the impact grinding chamber connects the discharge cavity and the annular guide cavity. The lower part of the annular guide cavity is provided with a mill discharge port, and the upper part of the annular guide cavity is provided with a mill air outlet.

5. A grinding system, characterized in that, The grinding system is equipped with an impact-type stirred mill as described in any one of claims 1-4.

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