Particle-regulated horizontal sand mill and operation method thereof

Abstract

The invention relates to the technical field of sand mills, and discloses a particle regulation and control horizontal sand mill and an operation method thereof, and the particle regulation and control horizontal sand mill comprises a rack, a primary grinding mechanism, a separation mechanism and a secondary grinding mechanism. The primary grinding mechanism is arranged on the rack; the discharging end of the first-stage grinding mechanism communicates with the feeding end of the separating mechanism, and the separating mechanism is used for separating material particles generated by the first-stage grinding mechanism according to the set particle size and pumping the material particles with the particle size larger than the set particle size to the first-stage grinding mechanism; the second-stage grinding mechanism is arranged on the rack, and the separating mechanism pumps material particles with the particle size smaller than or equal to the set particle size to the second-stage grinding mechanism; each of the primary grinding mechanism and the secondary grinding mechanism comprises a grinding cylinder and a main shaft, the main shafts are rotationally arranged in the grinding cylinders, the main shaft in the primary grinding mechanism is connected with an integral rotor, and the main shaft in the secondary grinding mechanism is connected with a rod pin type rotor. The particle size of material particles can be reduced, and meanwhile the uniformity of the material particles is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sand mills, and in particular to a particle-controlled horizontal sand mill and an operating method thereof. Background Art

[0002] Horizontal sand mill is a highly efficient ultra-fine wet grinding equipment, which is widely used in coatings, inks, ceramics, new materials and other fields. The working principle of horizontal sand mill is that the motor drives the stirring element to rotate, so that the grinding medium and the material are constantly rolling, grinding and mixing. The grinding medium has a strong collision, shearing and impact effect on the material, so that the material can be dispersed and refined.

[0003] Sand mills can be divided into coarse grinders, micron-grade sand mills and nano-grade sand mills according to the size of the grinding particles. Among them, nano-grade sand mills can grind materials to nano-grade fineness and are widely used in scientific fields such as semiconductors and medicine. They are of great significance to the development of science and technology. For example, cerium oxide is a highly efficient polishing material. As an important component of the polishing liquid in chemical mechanical polishing technology, the size and size uniformity of cerium oxide particles are important factors affecting the performance of the polishing liquid, and nano-grade sand mills can be used to achieve nano-grade grinding of cerium oxide particles.

[0004] However, most of the existing sand mills are single-cylinder grinding machines, and the particle size of the grinding medium is fixed, resulting in the particle size of the generated material particles can only be maintained within a certain range. There are problems such as large particle size and low particle uniformity. If material particles with small particle size and low particle uniformity are to be obtained, it is necessary to replace the grinding medium and perform multiple grinding. The grinding steps are cumbersome and the efficiency is low. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a particle-controlled horizontal sand mill and an operation method thereof, which can reduce the particle size of material particles while improving the particle uniformity.

[0006] The present invention provides a particle-controlled horizontal sand mill, comprising:

[0007] frame;

[0008] A primary grinding mechanism is arranged on the frame;

[0009] A separation mechanism, wherein the discharge end of the primary grinding mechanism is connected to the feed end of the separation mechanism, and the separation mechanism is used to separate the material particles generated by the primary grinding mechanism according to a set particle size, and pump the material particles with a particle size larger than the set particle size to the primary grinding mechanism;

[0010] A secondary grinding mechanism is arranged on the frame, and the separation mechanism pumps the material particles with a particle size less than or equal to a set particle size to the secondary grinding mechanism;

[0011] The primary grinding mechanism and the secondary grinding mechanism both include a grinding cylinder and a main shaft. The main shaft is rotatably arranged in the grinding cylinder. The main shaft in the primary grinding mechanism is connected to an integral rotor, and the main shaft of the secondary grinding mechanism is connected to a pin-type rotor.

[0012] Optionally, the integral rotor comprises:

[0013] A rotor base is sleeved on the main shaft and key-connected with the main shaft;

[0014] A turbine rotor, fixedly sleeved on the rotor base, wherein the turbine rotor is provided with a plurality of guide holes and a plurality of recessed parts;

[0015] The high-efficiency pin-bar rotor is composed of a plurality of high-efficiency pin-bar groups arranged at intervals, each of which is composed of a plurality of high-efficiency pin-bar groups circumferentially connected to the side wall of the rotor base, and two adjacent high-efficiency pin-bar groups are arranged in a staggered manner;

[0016] The separation rotor comprises a rotating drum and a plurality of high-efficiency rod pins connected to the outer peripheral wall of the rotating drum, wherein the rotating drum is connected to the end of the rotor base.

[0017] Optionally, the turbine rotor, the high-efficiency pin rotor, and the separation rotor are arranged in sequence along a direction close to the discharge end of the grinding cylinder.

[0018] Optionally, the grinding cylinder is connected to the frame via a bearing seat, and the grinding cylinder comprises:

[0019] An outer cylinder connected to the bearing seat;

[0020] The inner cylinder is arranged inside the outer cylinder, and a plurality of protrusions are arranged at intervals on the inner wall of the inner cylinder.

[0021] Optionally, a spiral pipe is provided on the inner wall of the outer cylinder, and the spiral pipe is connected to an external chiller.

[0022] Optionally, the separation mechanism includes:

[0023] A separation cylinder, fixedly connected to the frame;

[0024] A secondary shaft is rotatably connected to the separation cylinder, and a portion of the secondary shaft is located inside the separation cylinder;

[0025] The separator is arranged in the separation cylinder and connected with the secondary shaft.

[0026] Optionally, the separation mechanism further includes:

[0027] The buffer tank is connected with the discharge end of the grinding cylinder of the primary grinding mechanism and the feed end of the separation cylinder through pipelines.

[0028] Optionally, the particle-controlled horizontal sand mill further comprises:

[0029] A mechanical sealing mechanism is provided at the connection between the main shaft and the grinding cylinder and at the connection between the secondary shaft and the separation cylinder.

[0030] The embodiment of the present invention further provides a method for using a particle-controlled horizontal sand mill, using the particle-controlled horizontal sand mill as described above, comprising:

[0031] conveying the material into the grinding cylinder of the primary grinding mechanism;

[0032] Grinding the material by using the primary grinding mechanism, and conveying the material particles produced by the primary grinding mechanism to the separation mechanism;

[0033] The separation mechanism separates the material particles according to the set particle size to obtain material particles with a particle size greater than the set value and material particles with a particle size less than the set value;

[0034] Pumping material particles with a particle size larger than a set value into the grinding cylinder of the primary grinding mechanism for further grinding;

[0035] The material particles with a particle size smaller than the set value are pumped into the grinding cylinder of the secondary grinding mechanism for grinding to obtain final material particles.

[0036] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0037] In the particle-controlled horizontal sand mill provided by the embodiment of the present invention, after the material is ground by the primary grinding mechanism, it enters the separation mechanism, and the material particles are separated in the separation mechanism according to the set particle size to obtain material particles with a particle size greater than the set value and material particles with a particle size less than the set value. The separation mechanism pumps the material particles with a particle size greater than the set value to the primary grinding mechanism for grinding again, while the material particles with a particle size less than the set value enter the secondary grinding mechanism for grinding, thereby obtaining the final material particles. The large particle material and the small particle material are separated by the separation mechanism, and the large particle material is subjected to secondary grinding, and the small particle material is finely ground in the secondary grinding mechanism, thereby achieving the purpose of reducing the particle size of the material particles and improving the uniformity of the material particles. In addition, for materials of different particle sizes, the grinding time, grinding medium and other operating processes of the primary grinding mechanism and the secondary grinding mechanism can be controlled by partitioning to achieve the purpose of reducing the particle size of the material particles and improve the uniformity of the material particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic structural diagram of a particle-controlled horizontal sand mill provided in an embodiment of the present invention.

[0039] Figure 2 A schematic structural diagram of a primary grinding mechanism in a particle-controlled horizontal sand mill provided in an embodiment of the present invention.

[0040] Figure 3 A structural cross-sectional view of a primary grinding mechanism in a particle-controlled horizontal sand mill provided in an embodiment of the present invention.

[0041] Figure 4 A schematic structural diagram of an integral rotor in a particle-controlled horizontal sand mill provided in an embodiment of the present invention.

[0042] Figure 5 A schematic structural diagram of a separation mechanism in a particle-controlled horizontal sand mill provided in an embodiment of the present invention.

[0043] Figure 6 A structural cross-sectional view of a separation mechanism in a particle-controlled horizontal sand mill provided in an embodiment of the present invention.

[0044] Figure 7 A schematic structural diagram of a separator in a particle-controlled horizontal sand mill provided in an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1. Frame; 2. Primary grinding mechanism; 3. Separation mechanism; 31. Separation cylinder; 32. Secondary shaft; 33. Separator; 34. Buffer tank; 4. Secondary grinding mechanism; 5. Bearing seat; 6. Grinding cylinder; 61. Outer cylinder; 62. Inner cylinder; 7. Main shaft; 8. Integral rotor; 81. Rotor base; 82. Turbine rotor; 83. High-efficiency rod pin rotor; 831. High-efficiency rod pin; 84. Separation rotor; 9. Rod pin rotor; 10. Driving mechanism; 11. Mechanical sealing mechanism. DETAILED DESCRIPTION

[0047] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0048] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] The horizontal sand mill is a highly efficient ultra-fine wet grinding equipment. Its working principle is to use a motor to drive the stirring element to rotate, so that the grinding medium and the material are constantly rolling, grinding and mixing. The grinding medium has a strong collision, shearing and impact effect on the material, so that the material can be dispersed and refined.

[0050] Sand mills can be divided into coarse grinders, micron-grade sand mills and nano-grade sand mills according to the size of the grinding particles. Among them, nano-grade sand mills can grind materials to nano-level fineness and are widely used in scientific fields such as semiconductors and medicine. They are of great significance to promoting the development of science and technology.

[0051] For example, cerium oxide is a highly efficient polishing material, which is often used in the polishing of optical glass devices, semiconductor crystals and other devices to improve the performance and reliability of the devices. Cerium oxide can not only be used as a grinding medium for sand mills, which helps to achieve ultra-fine grinding and dispersion of materials; at the same time, cerium oxide is also an important component of polishing liquid in chemical mechanical polishing technology, which has the effect of improving polishing quality.

[0052] Among them, the size and uniformity of cerium oxide particles are important factors affecting polishing performance. Nano-scale sand mills can be used to achieve nano-scale grinding of cerium oxide particles. With the growing prosperity of the semiconductor market, the requirements for semiconductor polishing quality are becoming increasingly stringent. Therefore, optimizing the size and uniformity of cerium oxide particles can improve the quality of semiconductor polishing and promote the high-quality development of the semiconductor industry. Therefore, optimizing the sand mill, reducing the particle size of the material particles it produces, and improving the uniformity are important goals for promoting the development of sand mills.

[0053] However, most of the existing sand mills are single-cylinder grinding machines, and the particle size of the grinding medium is fixed, resulting in the particle size of the generated material particles can only be maintained within a certain range. There are problems such as large particle size and low particle uniformity. If material particles with small particle size and low particle uniformity are to be obtained, it is necessary to replace the grinding medium and perform multiple grinding. The grinding steps are cumbersome and the efficiency is low.

[0054] To this end, an embodiment of the present invention provides a particle-controlled horizontal sand mill and an operating method thereof, which can fully disperse and grind the material and the grinding medium during the grinding process through a special rotor design and an improvement in the overall structure of the horizontal sand mill, thereby achieving the goal of reducing the size of the output particle while improving the uniformity of the output particles.

[0055] At least one embodiment of the present invention provides a particle-controlled horizontal sand mill, comprising a frame, a primary grinding mechanism, a separation mechanism and a secondary grinding mechanism. The primary grinding mechanism is arranged on the frame; the discharge end of the primary grinding mechanism is connected to the feed end of the separation mechanism, the separation mechanism is used to separate the material particles generated by the primary grinding mechanism according to the set particle size, and pump the material particles with a particle size greater than the set particle size to the primary grinding mechanism; the secondary grinding mechanism is arranged on the frame, and the separation mechanism pumps the material particles with a particle size less than or equal to the set particle size to the secondary grinding mechanism; the primary grinding mechanism and the secondary grinding mechanism both include a grinding cylinder and a main shaft, the main shaft is rotatably arranged in the grinding cylinder, the main shaft in the primary grinding mechanism is connected to an integral rotor, and the main shaft of the secondary grinding mechanism is connected to a pin-type rotor.

[0056] In the particle-controlled horizontal sand mill provided in the above-mentioned embodiment of the present invention, after the material is ground by the primary grinding mechanism, it enters the separation mechanism, and the material particles are separated in the separation mechanism according to the set particle size to obtain material particles with a particle size greater than the set value and material particles with a particle size less than the set value. The material particles with a particle size greater than the set value enter the primary grinding mechanism again and are ground again, while the material particles with a particle size less than the set value enter the secondary grinding mechanism and are ground to obtain the final material particles. The large-particle material and the small-particle material are separated by the separation mechanism, and the large-particle material is ground for the second time, and the small-particle material is finely ground in the secondary grinding mechanism, thereby achieving the purpose of reducing the particle size of the material particles and improving the uniformity of the material particles.

[0057] The present invention is described below by several specific embodiments. In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one accompanying drawings, the component may be represented by the same reference numeral in each of the accompanying drawings.

[0058] Reference Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a particle-controlled horizontal sand mill, comprising a frame 1, a primary grinding mechanism 2, a separation mechanism 3 and a secondary grinding mechanism 4. The primary grinding machine 2 is arranged on the frame 1; the discharge end of the primary grinding mechanism 2 is connected to the feed end of the separation mechanism 3, and the separation mechanism 3 is used to separate the material particles produced by the primary grinding mechanism 2 according to the set particle size, and pump the material particles with a particle size greater than the set particle size to the primary grinding mechanism 2; the secondary grinding mechanism 4 is arranged on the frame 1, and the separation mechanism 3 pumps the material particles with a particle size less than or equal to the set particle size to the secondary grinding mechanism 4; the primary grinding mechanism 2 and the secondary grinding mechanism 4 both include a grinding cylinder 6 and a main shaft 7, the main shaft 7 is rotatably arranged in the grinding cylinder 6, the main shaft 7 in the primary grinding mechanism 2 is connected to an integral rotor 8, and the main shaft 7 of the secondary grinding mechanism 4 is connected to a rod-pin type rotor 0.

[0059] Specifically, the frame 1 serves as a mounting and fixing platform for the primary grinding mechanism 2, the secondary grinding mechanism 4 and the separation mechanism 3, and can be a frame structure. The frame 1 can be provided with two layers, and the primary grinding mechanism 2 and the secondary grinding mechanism 4 can be installed on the upper layer of the frame 1, and the separation mechanism 3 can be installed on the lower layer of the frame 1.

[0060] The primary grinding mechanism 2 also includes a bearing seat 5. The bearing seat 5 can be fixed to the frame 1 by bolts, the grinding cylinder 6 is fixedly arranged relative to the bearing seat 5, the main shaft 7 is rotatably connected to the bearing seat 5, and one end of the main shaft 7 is a rotating end, and the other end is a transmission end. The rotating end of the main shaft 7 is located inside the grinding cylinder 6, and the transmission end is located on one side of the bearing seat 5. The main shaft 7 can be driven to rotate through the transmission end, and the integral rotor 8 is fixedly sleeved on one side of the rotating end of the main shaft 7. Among them, the axis of the main shaft 7 coincides with the axis of the grinding cylinder 6. When the main shaft 7 rotates, it can drive the integral rotor 8 to rotate. When the integral rotor 8 rotates at a high speed, it stirs the grinding media and materials in the grinding cylinder 6, so that the grinding media and materials are continuously rolled, collided and mixed, thereby achieving material grinding.

[0061] The primary grinding mechanism 2 has a feed end and a discharge end. Before the grinding starts, the material and the grinding medium can be conveyed to the grinding cylinder 6 through the feed end. After the grinding is completed, the material can be discharged through the discharge end. A screening element can be provided at the discharge end port to separate the material and the grinding medium. Only the material can be discharged, while the grinding medium will remain in the grinding cylinder 6. The screening element can be a screen.

[0062] The separation mechanism 3 can be fixed on the frame 1. The separation mechanism 3 has a feed end and at least two discharge ends. The discharge end of the primary grinding mechanism 2 is connected to the feed end of the separation mechanism 3, and the material produced by the primary grinding mechanism 2 enters the separation mechanism 3. The separation mechanism 3 can separate material particles by stepless speed regulation, and the separated particle size can be achieved by controlling the speed, so that material particles with a particle size greater than a set value and material particles with a particle size less than the set value can be separated. One of the discharge ends of the separation mechanism 3 is connected to the feed end of the primary grinding mechanism 2, and material particles with a particle size greater than the set value can be pumped into the primary grinding mechanism 2 again for secondary grinding, and this cycle is repeated until the particle size of all material particles is less than the set value.

[0063] The structure of the secondary grinding mechanism 4 is similar to that of the primary grinding mechanism 2, and both can grind the material. The difference is that the rotor for stirring inside the primary grinding mechanism 2 is an integral rotor 8, and the rotor for stirring in the secondary grinding mechanism 4 is a rod-pin type rotor 9. The secondary grinding mechanism 4 also has a feed end and a discharge end. The other discharge end of the separation mechanism 3 is connected to the feed end of the secondary grinding mechanism 4. Material particles with a particle size smaller than the set value are pumped into the secondary grinding mechanism 4. After the material is ground in the secondary grinding mechanism 4, the final material particles are obtained. At the same time, the discharge end of the secondary grinding mechanism 4 can be connected to a separation device for separating the material and the grinding medium, which is used to separate the final material particles from the grinding medium.

[0064] The particle size of the grinding medium in the primary grinding mechanism 2 is larger than that in the secondary grinding mechanism 4. The separation mechanism 3 is used to separate the large particle material from the small particle material, and the large particle material is subjected to secondary grinding, and the small particle material is finely ground in the secondary grinding mechanism 4, thereby achieving the purpose of reducing the particle size of the material and also facilitating improving the uniformity of the material particles.

[0065] In addition, during the grinding process, by controlling the grinding time, grinding media and other factors of the primary grinding mechanism and the secondary grinding mechanism, material particles of different particle sizes can be obtained. Therefore, in actual operation, for materials of different particle sizes, the grinding time, grinding media and other operating processes of the primary grinding mechanism and the secondary grinding mechanism can be controlled by partitioning to achieve the grinding of materials of different particle sizes, and the uniformity of the material particles can be improved while reducing the particle size of the material particles.

[0066] In one embodiment of the present invention, referring to Figure 3 and Figure 4 As shown, the integral rotor 8 includes a rotor base 81, a turbine rotor 82, a high-efficiency pin rotor 83 and a separation rotor 84. Among them, the rotor base 81 is sleeved on the main shaft 7 and keyed to the main shaft 7; the turbine rotor 82 is fixedly sleeved on the rotor base 81, and a plurality of guide holes and a plurality of recessed portions are provided on the turbine rotor 82; the high-efficiency pin 831 rotor 83 is composed of a plurality of high-efficiency pin groups, each of which is composed of a plurality of high-efficiency pins 831 circumferentially connected to the side wall of the rotor base 81, and two adjacent high-efficiency pin groups are staggered; the separation rotor 84 includes a rotating drum and a plurality of high-efficiency pin groups connected to the outer peripheral wall of the rotating drum, and the rotating drum is connected to the end of the rotor base 81.

[0067] Specifically, the rotor base 81 can be a cylindrical barrel structure, and the rotor base 81 is sleeved on the main shaft 7 and key-connected with the main shaft 7, so that the rotor base 81 can be driven to rotate when the main shaft 7 rotates. Since the turbine rotor 82, the high-efficiency rod pin rotor 83 and the separation rotor 84 are all connected to the rotor base 81, they need to rotate at a high speed during the grinding process, so the rotor base 81 can be made of silicon carbide, which has high hardness and wear resistance, and is also convenient for opening mounting screw holes.

[0068] The turbine rotor 82 is fixedly sleeved on the rotor base 81. The turbine rotor 82 may be a cylindrical structure as a whole. A connection hole for sleeved on the rotor base 81 is opened in the middle of the cylindrical structure. The interior of the turbine rotor 82 is hollowed out, and a plurality of guide holes are evenly spaced on the outer wall of the turbine rotor 82. The guide holes are connected to the hollow interior of the turbine rotor 82. In addition, a plurality of depressions are processed on the outer wall of the turbine rotor 82. During the grinding process, the turbine rotor 82 rotates at a high speed, and the plurality of guide holes and depressions provided on the turbine rotor 82 can break up the agglomeration of material particles, facilitate the passage of materials, and fully mix the materials and the grinding media, thereby avoiding the situation where the materials agglomerate and cause insufficient grinding.

[0069] High-efficiency rod pin 831 The rotor 83 is composed of multiple groups of high-efficiency rod pin groups, and each group of high-efficiency rod pin groups is composed of multiple high-efficiency rod pins 831. For example, there are four groups of high-efficiency rod pin groups, and they are arranged in sequence along the axis of the rotor base 81. Each group of high-efficiency rod pin groups includes four high-efficiency rod pins 831. The high-efficiency rod pins 831 can be fixedly connected to the outer peripheral wall of the rotor base 81 by bolts. The four high-efficiency rod pins 831 are evenly spaced around the axis of the rotor base 81. The two adjacent groups of high-efficiency rod pin groups are staggered. The staggered arrangement of high-efficiency rod pins 831 is conducive to improving the grinding effect. In addition, the high-efficiency rod pins 831 can be a fan-shaped block structure, which can reduce the resistance when the rotor rotates, thereby increasing the linear speed of the entire rotor 8, and further improving the grinding effect.

[0070] The separation rotor 84 includes a drum and a high-efficiency rod pin 831. The drum is fixedly connected to the end of the rotor base 81, and the axis of the drum coincides with the axis of the rotor base 81. The high-efficiency rod pin 831 on the drum has the same structure and the same arrangement as the high-efficiency rod pin 831 in the high-efficiency rod pin rotor 83. The high-efficiency rod pin 831 provided on the drum can also be used for grinding, and the cavity inside the drum can play a centrifugal role during the rotation process, which can throw materials with larger particle sizes, agglomerates or grinding media to the wall of the grinding drum 6, which is beneficial to improve the grinding effect. At the same time, a plurality of guide holes are provided on the side wall of the drum to facilitate the passage of materials and grinding media.

[0071] Furthermore, the turbine rotor 82, the high-efficiency pin rotor 83 and the separation rotor 84 are arranged in sequence along the direction close to the discharge end of the grinding cylinder 6, which is conducive to improving the grinding effect. The turbine rotor 82 is arranged on the side close to the feeding end of the grinding cylinder 6, which can fully break up the material that has just entered the grinding cylinder 6. During the grinding process, the material and the grinding medium are mostly gathered in the middle, and the high-efficiency pin rotor 83 arranged in the middle can fully grind the material, and the separation rotor 84 is arranged on the side close to the discharge end of the grinding cylinder 6, which is convenient for separating the material and the grinding medium and facilitating the discharge.

[0072] It should be noted that the use of an integral rotor 8 in the primary grinding mechanism 2 can fully break up the material. The different grinding effects produced by multiple rotors can improve the grinding effect and effectively reduce the particle size of the material particles. The use of a pin-type rotor 9 in the secondary grinding mechanism 4 can fully grind the material, reduce the overall particle size of the material particles, narrow the range of the material particle size, and improve the uniformity of the material.

[0073] Reference Figure 1 As shown, the particle-controlled horizontal sand mill also includes a driving mechanism 10, which is used to provide driving force for the primary grinding mechanism 2, the secondary grinding mechanism 4 and the separation mechanism 3. The driving mechanism 10 may include a driving motor for driving the main shaft 7 of the primary grinding mechanism 2, a driving motor for driving the secondary shaft 32 of the separation mechanism 3, a driving motor for driving the main shaft 7 of the secondary grinding mechanism 4, and a driving motor for driving the separation device at the discharge end of the secondary grinding mechanism 4.

[0074] In one embodiment of the present invention, referring to Figure 3 As shown, the grinding cylinder 6 is connected to the frame through the bearing seat 5, and the grinding cylinder 6 includes an outer cylinder 61 and an inner cylinder 62. The inner cylinder 62 is arranged inside the outer cylinder 61, and a plurality of protrusions are evenly arranged on the inner wall of the inner cylinder 62. The plurality of protrusions are conducive to mixing and colliding the material and the grinding medium, which can further improve the grinding effect.

[0075] In the above embodiment, during the grinding process, the integral rotor 8 rotates at a high speed, so that the stirred material and the grinding medium are continuously rolled, which easily increases the temperature of the material, the grinding medium and the body of the grinding cylinder 6, affecting the grinding effect.

[0076] To this end, an embodiment of the present invention provides an improved approach.

[0077] Reference Figure 3 As shown, a spiral pipe is provided on the inner wall of the outer cylinder 61, and the spiral pipe is connected to an external chiller. During the grinding process, the external chiller can continuously input cooling water into the spiral pipe, which can effectively reduce the temperature of the cylinder and the interior of the grinding cylinder 6. At the same time, a sealing ring can be provided at the connection between the outer cylinder 61 and the inner cylinder 62 to improve the sealing performance and prevent cooling water leakage.

[0078] In one embodiment of the present invention, referring to Figure 6 , Figure 7 As shown, the separation mechanism 3 includes a separation cylinder 31, a secondary shaft 32 and a separator 33. The separation cylinder 31 is fixedly connected to the frame 1; the secondary shaft 32 is rotatably connected to the separation cylinder 31, and a part of the secondary shaft 32 is located inside the separation cylinder 31; the separator 33 is connected to one end of the secondary shaft 32 located inside the separation cylinder 31.

[0079] Specifically, the separation mechanism 3 is connected to the primary grinding mechanism 2 through a pipeline, the separation cylinder 31 can be connected to the lower layer of the frame 1 through a fixed mounting seat, and the separator 33 is a vortex structure. When the secondary shaft 32 rotates, the separator 33 is driven to rotate. When the separator 33 rotates, it can separate the material with large particle size from the material with small particle size under the action of centrifugal force. The material with large particle size is thrown out along the vortex, while the material with small particle size is gathered in the center of the vortex. The particle size of the separated material is achieved by controlling the rotation speed of the secondary shaft 32. Of course, the separator 33 can also be a gap screen structure, and the aperture of the screen is controlled to separate materials of different particle sizes.

[0080] In one embodiment of the present invention, referring to Figure 1 As shown, the separation mechanism 3 further includes a buffer tank 34, which is disposed between the discharge end of the grinding cylinder 6 of the primary grinding mechanism 2 and the feed end of the separation cylinder 31, and the buffer tank 34 is connected to the discharge end of the grinding cylinder 6 of the primary grinding mechanism 2 and the feed end of the separation cylinder 31 through a pipeline. The material produced by the primary grinding mechanism 2 first enters the buffer tank 34 and is then transported to the separation mechanism 3. The material can first be deposited in the buffer tank 34 for a certain amount before entering the separation mechanism 3 for separation.

[0081] In the above embodiment, during the grinding and separation processes, the main shaft 7 and the secondary shaft 32 are required to rotate at high speed, the main shaft 7 rotates relative to the grinding cylinder 6, and the secondary shaft 32 rotates relative to the separation cylinder 31. To ensure the safety and sealing of the equipment, it is necessary to ensure the sealing effect and stability of the connection between the main shaft 7 and the grinding cylinder 6, and the secondary shaft 32 and the separation cylinder 31.

[0082] To this end, an embodiment of the present invention provides an improved approach.

[0083] Reference Figure 3 , Figure 6 As shown, the particle-controlled horizontal sand mill also includes a mechanical sealing mechanism, which is provided at the connection between the main shaft 7 and the grinding cylinder 6 and at the connection between the secondary shaft 32 and the separation cylinder 31. The mechanical sealing structure adopts a double-end mechanical seal, which can ensure the sealing effect and connection effect of the connection between the main shaft 7 and the grinding cylinder 6 and the connection between the secondary shaft 32 and the separation cylinder 31, and ensure that the equipment can operate safely and stably.

[0084] The embodiment of the present invention further provides a method for using a particle-controlled horizontal sand mill, which uses the particle-controlled horizontal sand mill described above, comprising:

[0085] The material is conveyed into the grinding cylinder 6 of the primary grinding mechanism 2;

[0086] The material is ground by the primary grinding mechanism 2, and the material particles produced by the primary grinding mechanism 2 are transported to the separation mechanism 3;

[0087] The separation mechanism 3 separates the material particles according to the set particle size to obtain material particles with a particle size greater than the set value and material particles with a particle size less than the set value;

[0088] The material particles with a particle size larger than the set value are transported to the grinding cylinder 6 of the primary grinding mechanism 2 for further grinding;

[0089] The material particles with a particle size smaller than the set value are transported to the grinding cylinder 6 of the secondary grinding mechanism 4 for grinding to obtain final material particles.

[0090] Specifically, before grinding, grinding media are selected according to the grinding material, and the grinding media include primary grinding media and secondary grinding media. The particle size of the primary grinding media is larger than that of the secondary grinding media. The primary grinding media and the material are input into the grinding cylinder 6 of the primary grinding mechanism 2, and the secondary grinding media are input into the grinding cylinder 6 of the secondary grinding mechanism 4. After the material is ground in the primary grinding mechanism 2, it enters the separation mechanism 3, and the material particles with a particle size larger than the set value are transported to the primary grinding mechanism 2 for re-grinding in the separation mechanism 3, and the material particles with a particle size smaller than the set value are transported to the secondary grinding mechanism 4 for grinding, so as to obtain the final material particles using the secondary grinding mechanism 4.

[0091] In actual operation, for materials with different particle sizes, the grinding time, grinding media and other operating processes of the first-level grinding mechanism 2 and the second-level grinding mechanism 3 can be controlled by partitioning to achieve the grinding of materials with different particle sizes and achieve the purpose of reducing the particle size of the material particles, while also improving the uniformity of the material particles.

[0092] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A particle-controlled horizontal sand mill, characterized in that: include: Rack (1); A primary grinding mechanism (2) is arranged on the frame (1); A separation mechanism (3), wherein the discharge end of the primary grinding mechanism (2) is connected to the feed end of the separation mechanism (3), and the separation mechanism (3) is used to separate the material particles generated by the primary grinding mechanism (2) according to a set particle size, and to pump the material particles having a particle size larger than the set particle size to the primary grinding mechanism (2); A secondary grinding mechanism (4) is arranged on the frame (1), and the separation mechanism (3) pumps material particles with a particle size less than or equal to a set particle size to the secondary grinding mechanism (4); The primary grinding mechanism (2) and the secondary grinding mechanism (4) both comprise a grinding cylinder (6) and a main shaft (7); the main shaft (7) is rotatably arranged in the grinding cylinder (6); an integral rotor (8) is connected to the main shaft in the primary grinding mechanism (2); and a pin-type rotor (9) is connected to the main shaft of the secondary grinding mechanism (4).

2. The particle-controlled horizontal sand mill according to claim 1, characterized in that: The integral rotor (8) comprises: A rotor base (81) is sleeved on the main shaft (7) and key-connected to the main shaft (7); A turbine rotor (82) is fixedly sleeved on the rotor base (81), and a plurality of guide holes and a plurality of recessed portions are provided on the turbine rotor (82); A high-efficiency pin rotor (83) is composed of a plurality of high-efficiency pin groups arranged at intervals, each of the high-efficiency pin groups is composed of a plurality of high-efficiency pins (831) circumferentially connected to the side wall of the rotor base (81), and two adjacent high-efficiency pin groups are staggered; The separation rotor (84) comprises a rotating drum and a plurality of high-efficiency rod pins (831) connected to the outer peripheral wall of the rotating drum, wherein the rotating drum is connected to the end of the rotor base (81).

3. The particle-controlled horizontal sand mill according to claim 2, characterized in that: The turbine rotor (82), the high-efficiency pin rotor (83), and the separation rotor (84) are arranged in sequence along a direction close to the discharge end of the grinding cylinder (6).

4. The particle-controlled horizontal sand mill according to claim 1, characterized in that: The grinding cylinder (6) is connected to the frame via a bearing seat (5), and the grinding cylinder (6) comprises: An outer cylinder (61) connected to the bearing seat (5); The inner cylinder (62) is arranged inside the outer cylinder (61), and a plurality of protrusions are arranged at intervals on the inner wall of the inner cylinder (62).

5. The particle-controlled horizontal sand mill according to claim 4, characterized in that: A spiral pipe is provided on the inner wall of the outer cylinder (61), and the spiral pipe is connected to an external chiller.

6. The particle-controlled horizontal sand mill according to claim 1, characterized in that: The separation mechanism (3) comprises: A separation cylinder (31) fixedly connected to the frame (1); A secondary shaft (32) is rotatably connected to the separation cylinder (31), and a portion of the secondary shaft (32) is located inside the separation cylinder (31); The separator (33) is arranged in the separation cylinder (31) and connected to the secondary shaft (32).

7. The particle-controlled horizontal sand mill according to claim 6, characterized in that: The separation mechanism (3) further comprises: The buffer tank (34) is connected to the discharge end of the grinding cylinder (6) of the primary grinding mechanism (2) and the feed end of the separation cylinder (31) through a pipeline.

8. The particle-controlled horizontal sand mill according to claim 6, characterized in that: Also includes: A mechanical sealing mechanism (11) is provided at the connection between the main shaft (7) and the grinding cylinder (6) and at the connection between the secondary shaft (32) and the separation cylinder (31).

9. A method for using a particle-controlled horizontal sand mill, characterized in that: A horizontal sand mill with particle control as claimed in any one of claims 1 to 8, comprising: conveying the material into the grinding cylinder (6) of the primary grinding mechanism (2); Grinding the material using the primary grinding mechanism (2), and conveying the material particles produced by the primary grinding mechanism (2) to the separation mechanism (3); The separation mechanism (3) separates the material particles according to the set particle size to obtain material particles with a particle size greater than the set value and material particles with a particle size less than the set value; Pumping material particles with a particle size greater than a set value into the grinding cylinder (6) of the primary grinding mechanism (2) for further grinding; The material particles with a particle size smaller than the set value are pumped into the grinding cylinder (6) of the secondary grinding mechanism (4) for grinding to obtain final material particles.

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