Grinding and sorting system and method for producing high-fine calcined clay and vertical grinding and sorting device

Abstract

The invention provides a grinding and sorting system and method for producing high-fine calcined clay and a vertical grinding and sorting device, and relates to the technical field of calcined clay processing. The vertical grinding and sorting device comprises a grinding cylinder and a sorting cylinder, wherein a material return opening and a material inlet are formed in the top of the grinding cylinder at intervals, and the sorting cylinder is vertically separated from the grinding cylinder through a grid plate; the sorting cylinder comprises a blanking chamber and a powder sorting chamber, and a first air inlet is formed in the side wall of the blanking chamber; the powder selecting chamber comprises a powder selecting rotor and a shell, the shell is communicated to the air inlet chamber, an annular separating area is reserved between the powder selecting rotor and the shell, and the annular separating area is downwards communicated to an ash hopper provided with a coarse material outlet; an inner cavity of the powder selecting rotor is downwards communicated to an air outlet pipe provided with a fine material outlet; a returned material elevator; a rear conveying mechanism; and a finished product warehouse. The grinding and sorting system provided by the invention is simple, convenient, low in cost and suitable for high-precision grinding, and meanwhile, the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to calcined clay processing technology, and in particular to a high-fineness calcined clay production grinding and sorting system, method and vertical grinding and sorting device. BACKGROUND

[0002] In recent years, mills and classifiers have been widely used in the grinding and sorting process of materials in the cement industry and other industries. However, the two machines are independently arranged, occupy a large space, and the materials need to be ground and sorted multiple times to separate the desired particle size product, which is a complex process that increases the cost of purchase, use and maintenance.

[0003] Chinese patent CN113399058B discloses a high-efficiency vertical dry-type stirring mill and its application. The mill includes a housing, a screw feeder, a grinding cylinder, a main shaft, a stirrer, an activation lining plate, a discharge device, a driving device, a classifier, and an air supply device. The classifier, the screw feeder, the grinding cylinder, the discharge device, and the driving device are sequentially arranged in the housing from top to bottom. The coarse particle return pipe of the classifier and the discharge end of the screw feeder are both in communication with the top of the grinding cylinder. The main shaft and the stirrer are arranged in the grinding cylinder, and the stirrer is fixed on the main shaft. The activation lining plate is arranged on the inner wall of the grinding cylinder. The discharge device is arranged at the bottom of the grinding cylinder and is fixed on the main shaft. The bottom of the main shaft is connected with the driving device. The space between the grinding cylinder and the housing forms an annular air chamber, and the air supply device is arranged below the discharge device and opposite to the annular air chamber. The material needs to pass through an upward channel from the bottom of the grinding cylinder to enter the classifier, and then the desired material is sorted out from the classifier. The path of the combination of the classifier and the grinding cylinder is not smooth, which makes the material lifting need to overcome its own gravity, thereby increasing the energy consumption.

[0004] Therefore, there is a need for a high-fineness calcined clay production grinding and sorting system, method and vertical grinding and sorting device to at least partially solve the above technical problems. SUMMARY

[0005] In view of this, the present application provides a high-fineness calcined clay production grinding and sorting system, method and vertical grinding and sorting device to at least solve one of the problems in the prior art.

[0006] The present application discloses a high-fineness calcined clay production grinding and sorting system, which comprises: A front conveying mechanism is used to convey the calcined clay. The vertical grinding and sorting device comprises a grinding cylinder with a return material port and a feeding port connected to the front conveying mechanism arranged at the top, and a sorting cylinder separated from the grinding cylinder by a grate plate, the sorting cylinder comprises a material falling chamber below the grate plate and a powder sorting chamber below the material falling chamber, a first air inlet for introducing a first gas is arranged on the sidewall of the material falling chamber to enable a part of the first gas to pass through the grate plate into the grinding cylinder and another part to enter the powder sorting chamber, the powder sorting chamber comprises a rotatable powder sorting rotor and a shell with air guide blades surrounding the powder sorting rotor, the shell is connected to an air inlet chamber for introducing a second gas, an annular separation zone is left between the powder sorting rotor and the shell, the annular separation zone is connected downward to a dust hopper with a coarse material outlet to enable the clay coarse material to fall from the dust hopper to the coarse material outlet through the annular separation zone, the inner cavity of the powder sorting rotor is connected downward to an air outlet pipe with a fine material outlet to enable the clay fine material to pass through the powder sorting rotor and be carried out to the fine material outlet along with the first gas and the second gas. A return material elevator connected to one end of the coarse material outlet and the other end of the return material port; A rear conveying mechanism connected to the fine material outlet for conveying the clay fine material; A finished product warehouse for storing the clay fine material.

[0007] In some embodiments of the present application, the grinding cylinder comprises: A first vertical shaft, the upper end of the first vertical shaft is connected to a first transmission system for driving the first vertical shaft to rotate; A stirring blade arranged to the first vertical shaft, the stirring blade is in a spiral shape and extends from the bottom to the top in the grinding cylinder for driving the clay to rise; Grinding bodies for grinding the clay together with the stirring blade; The sorting cylinder comprises: A rotating disc rotatably arranged above the powder sorting rotor to scatter and sprinkle the material into the annular separation zone; A second vertical shaft arranged in the inner cavity of the powder sorting rotor, the upper end of the second vertical shaft is connected to the rotating disc and the powder sorting rotor, and the lower end of the second vertical shaft is connected to a second transmission system for driving the powder sorting rotor and the rotating disc to rotate.

[0008] In some embodiments of the present application, a cooling sleeve is arranged around the outside of the sidewall of the grinding cylinder, and a gas inlet for pouring the first gas is arranged at the top of the cooling sleeve to enable the first gas to flow through the cooling sleeve as a cooling gas to cool the grinding cylinder.

[0009] In some embodiments of the present application, the air inlet chamber is volute-shaped and horizontally surrounds the periphery of the shell.

[0010] In some embodiments of the present application, the stirring blade is provided with a blade lining plate.

[0011] In some embodiments of the present application, the blade lining plate comprises a wave lining plate and a step lining plate, the wave lining plate is located below the step lining plate at the position of the stirring blade.

[0012] In some embodiments of the present application, the inner side of the side wall of the grinding cylinder is provided with a cylinder lining plate.

[0013] In some embodiments of the present application, the cylinder lining plate comprises an upper lining plate and a lower lining plate located below the upper lining plate, wherein the upper lining plate has a constant thickness, and the lower lining plate gradually thickens from top to bottom, for guiding the clay to fall down to the bottom of the grinding cylinder and then to the center.

[0014] In a second aspect, the present application further discloses a vertical powder grinding and sorting device, comprising: a grinding cylinder with a return port and a feeding port arranged at the top in intervals; a sorting cylinder separated from the grinding cylinder by a grate, the sorting cylinder comprises a material falling chamber located below the grate and a powder sorting chamber located below the material falling chamber; a side wall of the material falling chamber is provided with a first air inlet for introducing a first gas, so that part of the first gas passes through the grate into the grinding cylinder and the other part enters the powder sorting chamber; the powder sorting chamber comprises a rotatable powder sorting rotor and a shell surrounding the powder sorting rotor and provided with guide vanes, the shell is communicated to an air inlet chamber for introducing a second gas, an annular separation zone is left between the powder sorting rotor and the shell, the annular separation zone is downwardly communicated to a dust hopper provided with a coarse material outlet, so that the clay coarse material falls from the dust hopper to the coarse material outlet through the annular separation zone; the inner cavity of the powder sorting rotor is downwardly communicated to an air outlet pipe provided with a fine material outlet, so that the clay fine material passes through the powder sorting rotor and is carried out to the fine material outlet along with the first gas and the second gas.

[0015] In a third aspect, the present application further discloses a powder grinding and sorting method for high-fineness calcined clay production, comprising the following steps: S1: obtaining calcined clay by the front conveying mechanism, and conveying the calcined clay to the feeding port of the vertical powder grinding and sorting device; S2: grinding the calcined clay through the grinding cylinder, and making the ground calcined clay fall into the sorting cylinder through the grate plate; S3: sorting the ground calcined clay falling into the sorting cylinder through step S2, and obtaining the clay coarse material and the clay fine material through the coarse material outlet and the fine material outlet respectively; S4: transporting the clay coarse material to the return material port into the grinding cylinder through the return material elevator to regrind the clay coarse material; S5: transporting the clay fine material to the finished product warehouse and storing through the rear conveying mechanism.

[0016] By using the technical scheme according to the embodiment of the application, the beneficial effects obtained at least include: 1. The high-fine calcined clay production grinding and sorting system has less equipment and simple process flow, is convenient for process arrangement and maintenance, and reduces investment cost.

[0017] 2. The vertical grinding and sorting device of the high-fine calcined clay production grinding and sorting system has compact structure, the sorting cylinder is arranged below the grinding cylinder, so that the ground material can enter the sorting cylinder by gravity, and energy consumption is reduced.

[0018] 3. The material falling chamber of the sorting cylinder of the vertical grinding and sorting device of the high-fine calcined clay production grinding and sorting system is provided with a first air inlet, so that the first gas can enter the grinding cylinder and the sorting cylinder, the first gas entering the grinding cylinder promotes the material fluidization in the grinding cylinder, which is beneficial to high-precision grinding of the material, and the first gas entering the sorting cylinder drives the clay fine material to realize material separation and collection of the clay fine material.

[0019] Additional advantages, objects, and features of the application will be set forth in part in the description which follows, and will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0020] It will be understood by those skilled in the art that the objects and advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. The components in the drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the application. For purposes of clarity and a consistent approach, portions of the drawings may have been exaggerated to show details of the application that would otherwise be obscure, in the drawings: Figure 1 Overall schematic diagram of the grinding and sorting system for producing high-fine calcined clay according to an embodiment of the application; Figure 2 Schematic diagram of the vertical grinding and sorting device in the grinding and sorting system for producing high-fine calcined clay according to another embodiment of the application; Figure 3 Schematic diagram of the grinding cylinder in the grinding and sorting system for producing high-fine calcined clay according to another embodiment of the application; Figure 4 Schematic diagram of the sorting cylinder in the grinding and sorting system for producing high-fine calcined clay according to another embodiment of the application; Figure 5 Top view of the powder sorting chamber in the grinding and sorting system for producing high-fine calcined clay according to another embodiment of the application; and Figure 6 Schematic diagram of the distribution of the blade lining in the grinding and sorting system for producing high-fine calcined clay according to another embodiment of the application.

[0022] Legend of reference signs: Front conveying mechanism 1; vertical grinding and sorting device 2; grinding cylinder 21; sorting cylinder 22; grate plate 23; return material port 211; feed port 212; first vertical shaft 213; first transmission system 214; stirring blade 215; grinding body 216; cooling sleeve 217; blade lining 218; wave lining 2181; stepped lining 2182; cylinder body lining 219; upper lining 2191; lower lining 2192; material falling chamber 221; powder sorting chamber 222; first air inlet 2211; powder sorting rotor 2221; housing 2222; air inlet chamber 2223; annular separation zone 2224; hopper 223; coarse material outlet 2231; air outlet pipe 224; fine material outlet 2241; rotating disc 225; second vertical shaft 226; second transmission system 227; return material elevator 3; rear conveying mechanism 4; finished product warehouse 5. DETAILED DESCRIPTION

[0023] The objects and advantages of the present application will be realized and attained by means of the instrumentalities and combinations particularly pointed out in the written description and appended drawings referred to herein. However, the present application should not be limited to the particular embodiments disclosed hereinabove, as this application is capable of being practiced in various forms and using various means. The detailed description set forth below in connection with the appended drawings is intended as a description of presently preferred embodiments of the application and is not intended to represent the only forms in which the present application can be practiced.

[0024] It should be noted that the terms used herein are merely for the purpose of describing specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0025] The ordinal numbers such as "first" and "second" used in the present application are merely identifiers and do not have any other meaning, for example, a particular order. Also, for example, the term "first member" itself does not imply the existence of a "second member," and the term "second member" itself does not imply the existence of a "first member."

[0026] It should be noted that the terms "upper," "lower," "front," "left," "right," "inner," "outer," and similar terms used herein are for illustrative purposes only and are not limiting.

[0027] The embodiment of the present application provides a grinding and sorting system for producing high-fineness calcined clay, which can include a front conveying mechanism 1, a vertical grinding and sorting device 2, a back material lifting machine 3, a rear conveying mechanism 4, and a finished product warehouse 5.

[0028] Specifically, the front conveying mechanism 1 is used to convey the calcined clay.

[0029] The vertical grinding and sorting device 2 includes a grinding cylinder 21 for grinding, which is provided with a back material port 211 and a feeding port 212 connected to the front conveying mechanism 1 at the top, and a sorting cylinder 22 which is separated from the grinding cylinder 21 up and down via a grate plate 23.

[0030] The sorting cylinder 22 includes a material falling chamber 221 arranged below the grate plate 23 and a powder sorting chamber 222 located below the material falling chamber 221. The side wall of the material falling chamber 221 is provided with a first air inlet 2211 for introducing a first gas.

[0031] Part of the first gas entering the material falling chamber 221 passes through the grate plate 23 into the grinding cylinder 21 upward, and the other part enters the powder sorting chamber 222 downward.

[0032] The powder selection chamber 222 comprises a rotatable powder selection rotor 2221 and a shell 2222 provided with air guide vanes around the powder selection rotor 2221. The shell 2222 is connected to an air inlet chamber 2223 for introducing the second gas. An annular separation zone 2224 is left between the powder selection rotor 2221 and the air guide vanes 2222. The annular separation zone 2224 is connected downwardly to a hopper 223 provided with a coarse material outlet 2231, so that the clay coarse material falls from the hopper 223 to the coarse material outlet 2231 through the grate plate 23 and the annular separation zone 2224. The inner cavity of the powder selection rotor 222 is connected downwardly to an air outlet pipe 224 provided with a fine material outlet 2241, so that the clay fine material is carried out to the fine material outlet 2241 with the first gas and the second gas from the air outlet pipe 224 through the grate plate 23 and the annular separation zone 2224.

[0033] A return elevator 3 is connected at one end to the coarse material outlet 2231 and at the other end to the return port 211.

[0034] A rear conveying mechanism 4 connected to the fine material outlet 2241 is used to convey the clay fine material.

[0035] A finished product warehouse 5 is used to store the clay fine material.

[0036] For a schematic diagram of the powder grinding and selection system for high-fineness calcined clay production and the vertical powder grinding and selection device, please refer to Figure 1 and Figure 2 It can be understood that the material in the embodiment is taken as an example of calcined clay, and only serves as a specific example for illustration. Of course, it can also be other materials to be ground and selected.

[0037] The front conveying mechanism 1 is used to convey the calcined clay to the vertical powder grinding and selection device 2. It can comprise one or more devices, and is not limited to the specific functions of the devices. For example, the front conveying mechanism 1 can comprise a material stabilizing bin for storing the calcined clay, an elevator for lifting the calcined clay, and a screw conveyor for stabilizing the continuous conveying of the calcined clay, without being limited thereto.

[0038] The grinding cylinder 21 is a structure for grinding. The specific way of grinding can be a vertical stirring mill or a ball mill. For example, as a vertical stirring mill structure, stirring vanes can be provided therein. Exemplarily, the stirring vanes can be composed of multiple flat vanes or spiral vanes.

[0039] The grate plate 23 is a structure for separating the grinding cylinder 21 and the sorting cylinder 22, which can be arranged between the grinding cylinder 21 and the sorting cylinder 22 by fixed connection. The grate plate 23 can block the clay that does not meet the particle size requirement from falling on one hand, and can be provided with a plurality of through holes to allow the ground clay that meets a certain particle size to pass through, for example, the diameter of the through hole can be 2mm. In addition, the grate plate 23 can allow the first gas to enter the grinding cylinder 21 from bottom to top, so as to reduce the possibility of unground clay blocking the grate plate 23 on one hand, and the first gas mixed with the material in the grinding cylinder 21 can drive the movement of the material on the other hand. When the clay falls through the grate plate 23, the first gas can also push the clay into the annular separation area 2224 in the sorting chamber 222.

[0040] Because of the actual process needs, the screen hole diameter provided by the grate plate 23 may not meet the requirement of the grinding fineness of the clay, or it is difficult to adapt to the fineness requirement of the clay due to the change of conditions, so it is necessary to separate the clay coarse material that does not meet the requirement from the clay fine material that meets the requirement in time, so that the clay coarse material can return to the grinding cylinder 21 for regrinding.

[0041] For the plan view of the structure of the sorting chamber 222, please refer to Figure 5 The sorting rotor 2221 can be a single cage rotor, or a double cage rotor with upper and lower structures. The sorting rotor 2221 can be provided with a plurality of moving blades or blades with different angles based on the position of the sorting rotor 2221, so as to realize the stable passing of the gas and the clay fine material. The rotating power of the sorting rotor 2221 can be driven synchronously by the power system shared with the grinding cylinder 21, or driven by another power system.

[0042] The shell 2222 is a horizontal annular structure surrounding the sorting rotor, and a plurality of air guide vanes are arranged on the shell 2222. On one hand, the air guide vanes allow the gas to pass through to realize the sorting function of the gas flow driving the clay fine material, and on the other hand, the air guide vanes block the clay to realize the stable operation of the machine. The air guide vanes arranged on the shell 2222 can be static vanes, such as parallel and equidistant arrangement, or moving vanes, such as spiral rotation, to realize the function of guiding the flow.

[0043] The air inlet chamber 2223 is used to introduce the second gas mainly used for separating the clay coarse material and the clay fine material. The second gas enters the shell 2222 from the air inlet chamber 2223 to realize the stable flow direction of the gas.

[0044] By the first gas and the second gas, with the rotation of the powder selection rotor 2221, the clay fine material enters the inner cavity of the powder selection rotor 2221 with the gas and enters the air outlet pipe 224, so as to reach the fine material outlet 2241 and be discharged; while the clay coarse material cannot be driven by the gas, and thus falls along the inner wall of the ash chute 223 to the coarse material outlet 2231, and then is returned to the return port 211 above by the lifting action of the return lifting machine 3, and enters the grinding cylinder for regrinding.

[0045] The rear conveying mechanism 4 is used for conveying the clay fine material selected by the vertical grinding and sorting device 2, and can also include one or more devices, and specifically can include a dust collector, a lifting machine and other functional devices, which are not limited here.

[0046] In this way, the grinding cylinder 21 and the sorting cylinder 22 in the vertical grinding and sorting device 2 are designed in one body, so that the processing system of the calcined clay is simple and convenient, and the maintenance and manufacturing costs are reduced. The first gas introduced into the material falling chamber 221 not only promotes the movement of the material in the grinding cylinder 21 and reduces the possibility of the material accumulating and blocking on the grate plate 23, but also causes the material to fall in the material falling chamber 221, and promotes the separation of the clay fine material in the powder selection chamber 222, so that the efficiency of grinding and sorting is improved compared with the simple combination of the grinding cylinder 21 and the sorting cylinder 22. The clay coarse material discharged from the coarse material outlet 2231 is lifted to the return port 211 by the return lifting machine 3, and reenters the grinding cylinder 21 for regrinding, so that the material can be fully utilized.

[0047] In some embodiments, the grinding and sorting system for producing high-fine calcined clay according to the embodiments of the present application, wherein the grinding cylinder 21 can include a first vertical shaft 213 and stirring blades 215.

[0048] The first vertical shaft 213 is connected to the first transmission system 214 for driving the rotation of the first vertical shaft 213.

[0049] The stirring blades 215 arranged to the first vertical shaft 213 are helical and extend from the bottom to the top in the grinding cylinder 21, and are used to drive the clay upward.

[0050] The grinding bodies 216 are used to grind the clay together with the stirring blades 215.

[0051] In some embodiments, the grinding and sorting system for producing high-fine calcined clay according to the embodiments of the present application, the sorting cylinder 22 can include a rotating disc 225 and a second vertical shaft 226.

[0052] The rotating disc 225 is rotatably arranged above the powder selection rotor 2221, so as to scatter and spread the material into the annular separation area 2224.

[0053] The second vertical shaft 226 is arranged in the inner cavity of the powder selection rotor 2221, the upper end of the second vertical shaft 226 is connected to the rotating disc 225 and the powder selection rotor 2221, and the lower end of the second vertical shaft 226 is connected to the second transmission system 227 for driving the powder selection rotor 2221 and the rotating disc 225 to rotate.

[0054] For the structure of the grinding cylinder 21 and the sorting cylinder 22, please refer to Figure 3 and Figure 4 It can be understood that the stirring blade 215 in the first vertical shaft 213 has a spiral structure, which can be in a double helix structure or a single helix structure. The grinding body 216 in the embodiment is an object for matching the grinding, which can be a spherical structure with a large density such as a steel ball. The grinding cylinder 21 adopts a structure similar to a vertical spiral stirring mill, and the material and the grinding body 216 are lifted and pushed to the upper part of the cylinder by the high-speed rotating spiral stirring blade 215, and then the material falls from the space between the stirring blade 215 and the cylinder wall at the upper part of the cylinder. The material meeting a certain particle size fineness can pass through the grate plate 23 below to enter the sorting cylinder 22, and the material that is not sufficiently ground will be lifted again by the stirring blade 215 to achieve multiple grinding. For example, a distance of 2.5-3 times the diameter of the grinding body 216 can be left between the stirring blade 215 and the cylinder wall to facilitate the falling of the material lifted to the upper part after grinding. The sorting cylinder 22 of the embodiment further includes a rotatable rotating disc 225 to realize the scattering of the material after falling on the rotating disc 225, and the material enters the annular separation zone 2224 with an initial horizontal outward speed without an initial vertical speed, which is more conducive to the separation of clay coarse material and clay fine material. The grinding cylinder 21 and the sorting cylinder 22 adopt independent power systems to respectively control the fineness of the grinding and the fineness of the powder selection, and when the particle size requirement of the material changes, the control mode of the process is simpler.

[0055] In some embodiments, the grinding and sorting system for producing high-fineness calcined clay can further include a cooling sleeve 217 arranged around the outside of the side wall of the grinding cylinder 21. The top of the cooling sleeve 217 is provided with a gas inlet for pouring the first gas, so that the first gas flows through the cooling sleeve 217 as a cooling gas to cool the grinding cylinder 21.

[0056] It can be understood that the grinding cylinder 21 will generate additional heat during the grinding process. In order to reduce the temperature of the grinding cylinder 21, the cooling sleeve 217 can be arranged around the outside of the side wall. For example, the cooling sleeve 217 can be connected to the first air inlet 2211 of the material falling chamber 221 by introducing the first gas, so that after reducing the temperature of the outer cylinder wall, the first gas is introduced from the first air inlet 2211 into the material falling chamber 221 and passes through the grate plate 23 upward, which can also play a role in reducing the temperature.

[0057] In some embodiments, the air inlet chamber 2223 can be a volute shape and horizontally surrounds the periphery of the shell 2222.

[0058] It can be understood that the air inlet chamber 2223 is designed as a volute shape, so that the second gas can be stably and uniformly blown from the fan along the air duct, and the air flow resistance is reduced by the guide vanes on the shell 2222, and the uniform air inlet in multiple directions also makes the material more dispersed.

[0059] In some embodiments, the stirring blade 215 can be provided with a blade lining plate 218.

[0060] It can be understood that the blade lining plate 218 can be made of wear-resistant material, and the fixing mode of the blade lining plate 218 can be fixed on the surface of the stirring blade 215 by bolts or dovetail grooves. In order to facilitate replacement, a plurality of blade lining plates 218 can be spliced. By arranging the blade lining plate 218, the contact between the stirring blade 215 and the material is reduced, thereby reducing the wear of the stirring blade 215 and reducing the maintenance cost.

[0061] The blade lining plate 218 can be designed in various shapes to cooperate with the grinding body 216 to achieve fine grinding of the material. For example, the blade lining plate 218 includes a wave lining plate 2181 and a stepped lining plate 2182, and the wave lining plate 2181 is located below the stepped lining plate 2182 at the position of the stirring blade 215.

[0062] It can be understood that below refers to the observation from top to bottom or from bottom to top along the upper surface of the stirring blade 215, and the wave lining plate 2181 with a wave structure is located below the stepped lining plate 2182 with a trapezoidal structure. Based on the movement mode of the clay in the stirring mill, along the stirring blade 215 spirally upward, the pressure of the material particles extruded by each other below is larger, and the material particles are relatively fine; the material and the steel ball above are less, and the pressure of the material extruded by each other is also smaller, and the material particles are relatively coarse. Compared with the wave lining plate 2181, the stepped lining plate 2182 is more conducive to absorbing the impact caused by the falling of the grinding body 216, and the wave lining plate 2181 is more conducive to cooperating with the grinding body 216 to reduce the retention of the material. Therefore, in order to adapt to the contact of the blade lining plate 218 with the material of different fineness, the structure of the stepped lining plate 2182 can be designed to improve the crushing efficiency of the large particle material above by cooperating the blade lining plate with the grinding body. The structure of the wave lining plate can be designed to ensure the fineness of the small particle material. Specifically, the position of the wave lining plate 2181 and the stepped lining plate 2182 is subject to the actual needs in work, for example, as shown in the figure, the wave lining plate 2181 is located below the stepped lining plate 2182 at the position of the stirring blade 215. Figure 6For the stirring blade 215 with three pitch heights, the step lining plate 2182 can be arranged on the stirring blade 215 at one pitch height above the stirring blade, and the wave lining plate 2181 is arranged below and spliced with the step lining plate 2182. In other words, the length value of the first vertical shaft 213 corresponding to the stirring blade 215 provided with the wave lining plate 2181 can be twice the length value of the first vertical shaft 213 corresponding to the stirring blade 215 provided with the step lining plate 2182.

[0063] In some embodiments, the inner side of the side wall of the grinding cylinder 21 can be further provided with a cylinder lining plate 219.

[0064] It can be understood that the cylinder lining plate 219 can protect the inner side of the side wall of the grinding cylinder 21, and reduce the degree of wear of the inner side of the side wall of the grinding cylinder 21 by the grinding body 216 and the material.

[0065] The cylinder lining plate 219 can also take various shapes for matching grinding, such as a wave-shaped lining plate, a smooth-shaped lining plate, and a ridge-shaped lining plate, and the specific arrangement manner and arrangement position are subject to the requirements of improving the grinding effect and reducing impact damage.

[0066] The cylinder lining plate 219 can include an upper lining plate 2191 and a lower lining plate 2192 located below the upper lining plate 2191, wherein the thickness of the upper lining plate 2191 is constant, and the thickness of the lower lining plate 2192 gradually increases from top to bottom, for guiding the clay to fall downward to the bottom of the grinding cylinder 21 and then to the center.

[0067] It can be understood that, in order to avoid the material accumulation in the corner of the side wall of the grinding cylinder 21 and the grate plate 23, the thickness of the cylinder lining plate 219 can gradually change from top to bottom, for forming a certain slope to make the material close to the center of the cylinder, so that the material is more convenient to be repeatedly lifted by the stirring blade 215 for grinding.

[0068] The embodiment of the present application also discloses a vertical grinding and sorting device 2. The vertical grinding and sorting device 2 can include a grinding cylinder 21 for grinding, which is provided with a return port 211 and a feeding port 212 at the top, and a sorting cylinder 22 which is separated from the grinding cylinder 21 up and down via a grate plate 23.

[0069] Specifically, the sorting cylinder 22 can include a material falling chamber 221 arranged below the grate plate 23 and a powder sorting chamber 222 located below the material falling chamber 221.

[0070] The side wall of the material falling chamber 221 is provided with a first air inlet 2211 for introducing a first gas. Part of the first gas entering the material falling chamber 221 passes through the grate plate 23 into the grinding cylinder 21 upward, and another part enters the powder sorting chamber 222 downward.

[0071] The powder selection chamber 222 comprises a rotatable powder selection rotor 2221 and a shell 2222 provided with air guide blades around the powder selection rotor 2221. The shell 2222 is communicated to an air inlet chamber 2223 for introducing the second gas. An annular separation zone 2224 is left between the powder selection rotor 2221 and the air guide blades 2222. The annular separation zone 2224 is downwardly communicated to a hopper 223 provided with a coarse material outlet 2231, so that the clay coarse material falls from the hopper 223 to the coarse material outlet 2231 through the grate plate 23 and the annular separation zone 2224. The inner cavity of the powder selection rotor 222 is downwardly communicated to an air outlet pipe 224 provided with a fine material outlet 2241, so that the clay fine material is carried out to the fine material outlet 2241 with the first gas and the second gas from the air outlet pipe 224 through the grate plate 23 and the annular separation zone 2224.

[0072] It can be understood that the vertical grinding and sorting device 2 is the core device of the above-mentioned grinding and sorting system for high-fineness calcined clay production. In actual use, the vertical grinding and sorting device 2 can be placed alone as a device in other processes to play the role of sorting and grinding, or can be combined with other one or even multiple vertical grinding devices 2 in the process to improve the grinding efficiency and / or improve the grading effect, so as to maximize its role.

[0073] The embodiment of the present application also discloses a processing method for calcined clay in a grinding and sorting system for high-fineness calcined clay production, which can comprise the following steps: S1: obtaining the calcined clay through the front conveying mechanism 1 and conveying the calcined clay to the feed inlet 212 of the vertical grinding and sorting device 2.

[0074] S2: grinding the calcined clay through the grinding cylinder 21 and making the ground calcined clay fall into the sorting cylinder 22 through the grate plate 23.

[0075] S3: sorting the ground calcined clay falling into the sorting cylinder 22 through the coarse material outlet 2231 and the fine material outlet 2241 to obtain the clay coarse material and the clay fine material respectively.

[0076] S4: conveying the clay coarse material to the return material inlet 211 into the grinding cylinder 21 through the return material elevator 3 to regrind the clay coarse material.

[0077] S5: conveying the clay fine material to the finished product warehouse 5 and storing through the rear conveying mechanism 4.

[0078] It can be understood that the grinding and sorting system for high-fineness calcined clay production in the above-mentioned embodiment is adopted in the method, and the calcined clay is used as a specific embodiment, and similar other materials can also be ground and sorted by using the method, which is not limited here.

[0079] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

Claims

1. A grinding and sorting system for producing fine calcined clay, characterized in that, include: The front conveying mechanism is used to transport calcined clay. Vertical grinding and sorting device, including: A grinding cylinder with a return port and an inlet connected to the front conveying mechanism is provided at the top; A sorting cylinder, separated from the grinding cylinder by a grate plate; The sorting cylinder includes a material discharge chamber located below the grate and a powder sorting chamber located below the material discharge chamber. The side wall of the material discharge chamber is provided with a first air inlet for introducing a first gas. The powder classifier chamber includes a rotatable powder classifier rotor and a housing with guide vanes surrounding the powder classifier rotor. The housing is connected to an air inlet chamber for introducing a second gas. An annular separation zone is provided between the powder classifier rotor and the housing. The annular separation zone is connected downward to an ash hopper with a coarse material outlet. The inner cavity of the powder classifier rotor is connected downward to an air outlet pipe with a fine material outlet. A return material elevator, one end of which is connected to the coarse material outlet and the other end of which is connected to the return material inlet; A rear conveying mechanism connected to the fine material outlet is used to convey clay fines; The finished product warehouse is used to store the clay fines.

2. The grinding and sorting system for producing fine calcined clay according to claim 1, characterized in that, The grinding cylinder includes: A first vertical shaft, the upper end of which is connected to a first transmission system for driving the first vertical shaft to rotate; The stirring blades are arranged on the first vertical shaft. The stirring blades are spiral-shaped and extend from the bottom to the top of the grinding cylinder to drive the clay upward. The grinding media is used in conjunction with the stirring blades to grind clay. The sorting cylinder includes: A turntable, rotatably disposed above the powder separator rotor, to disperse and sprinkle the material into the annular separation zone; A second vertical shaft is disposed in the inner cavity of the powder-selecting rotor. The upper end of the second vertical shaft is connected to the turntable and the powder-selecting rotor, and the lower end of the second vertical shaft is connected to a second transmission system for driving the rotor and the turntable to rotate.

3. The grinding and sorting system for producing fine calcined clay according to claim 1, characterized in that, A cooling sleeve is provided around the outer side wall of the grinding cylinder, and an air inlet for injecting a first gas is provided at the top of the cooling sleeve so that the first gas acts as a cooling gas to cool the grinding cylinder when it flows through the cooling sleeve.

4. The grinding and sorting system for producing fine calcined clay according to claim 1, characterized in that, The air inlet chamber is volute-shaped and horizontally surrounds the periphery of the housing.

5. The grinding and sorting system for producing fine calcined clay according to claim 1, characterized in that, The stirring blades are provided with blade liners.

6. The grinding and sorting system for producing fine calcined clay according to claim 5, characterized in that, The blade liner includes a corrugated liner and a stepped liner, wherein the corrugated liner is located below the position of the stirring blade.

7. The grinding and sorting system for producing fine calcined clay according to claim 1, characterized in that, The grinding cylinder has a cylinder liner plate on the inner side wall.

8. The grinding and sorting system for producing fine calcined clay according to claim 7, characterized in that, The cylinder liner includes an upper liner and a lower liner located below the upper liner. The upper liner has a constant thickness, while the lower liner gradually thickens from top to bottom to guide the clay downwards to the bottom of the grinding cylinder and then towards the center.

9. A vertical grinding and sorting device, characterized in that, include: A grinding cylinder with a return port and a feed port spaced apart at the top; A sorting cylinder is separated from the grinding cylinder by a grate plate. The sorting cylinder includes a material discharge chamber located below the grate plate and a powder classification chamber located below the material discharge chamber. The side wall of the material discharge chamber is provided with a first air inlet for introducing the first gas, so that a portion of the first gas passes through the grate and enters the grinding cylinder, while another portion enters the powder classifier chamber; The classifying chamber includes a rotatable classifying rotor and a housing with guide vanes surrounding the classifying rotor. The housing is connected to an air inlet chamber for introducing a second gas. An annular separation zone is provided between the classifying rotor and the housing. The annular separation zone is connected downward to a hopper with a coarse material outlet, so that coarse clay material falls from the hopper to the coarse material outlet through the annular separation zone. The inner cavity of the classifying rotor is connected downward to an air outlet pipe with a fine material outlet, so that fine clay material is carried out from the air outlet pipe to the fine material outlet along with the first gas and the second gas through the classifying rotor.

10. A method for grinding and separating fine calcined clay using the grinding and separating system for producing fine calcined clay according to any one of claims 1 to 8, characterized in that, Includes the following steps: The calcined clay is obtained through the front conveying mechanism and transported to the feed inlet of the vertical grinding and sorting device. The calcined clay is ground through the grinding cylinder, and the ground calcined clay falls into the sorting cylinder through the grate. The calcined clay that has been ground and falls into the sorting cylinder is sorted, and the coarse clay and fine clay are obtained through the coarse material outlet and the fine material outlet, respectively. The obtained clay coarse material is transported to the return port by the return material elevator and then enters the grinding cylinder so that the clay coarse material can be re-ground. The obtained clay fines are transported to the finished product warehouse and stored via the rear conveying mechanism.

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