A talc powder concentrator

Abstract

The utility model relates to a talc powder concentrator, including the casing, main shaft assembly, first revolving cage, scatter material tray and cyclone, the upper end part of casing is provided with the feed port, and the lower end part of casing is provided with the discharge gate, the side wall on the lower end part of casing is provided with the air inlet, the main shaft assembly is arranged vertically in the casing, and the upper end part of main shaft assembly is rotatably connected with casing, the first revolving cage is fixedly sleeved in the middle part of main shaft assembly, the side wall of first revolving cage is provided with a plurality of first grinding balls, and the bottom of first revolving cage is provided with a plurality of second grinding balls, the scatter material tray is sleeved on the main shaft assembly, and the scatter material tray is below first revolving cage, the cyclone is provided with a plurality of, and the air inlet of multiple cyclones all are communicated with the upper end part of casing, relative to prior art, the utility model realizes double grinding structure, can more fast, fully refine talc powder, prevents talc powder from adhering to group, can accurate control finished product fine powder granularity, reduces qualified fine powder waste, reduces fine powder content in coarse powder.

Description

Technical Field

[0001] This utility model relates to the technical field of talc production equipment, and more specifically, to a talc powder classifier. Background Technology

[0002] A talc classifier is a device used for particle size classification and screening of talc powder. The classification chamber of the talc classifier has a cylindrical shell, with small fan blades and a feeding disc fixed on a vertical shaft. Driven by an electric motor, the fan rotates and generates a strong centrifugal force in the classification chamber. After the air-powder mixture enters the classification chamber, large or heavy particles are thrown to the edges of the classification chamber by centrifugal force and fall naturally as coarse powder and are discharged. Small or light materials are less affected by centrifugal force and are carried to a higher position by the airflow to enter the next component for further classification or collection.

[0003] Existing talc classifiers still have some problems in practical applications. For example, talc powder itself has a certain degree of hygroscopicity. If the water content is slightly high or the ambient humidity is high, it is easy to agglomerate and form large coarse particles, which affects the sorting accuracy of talc powder. In addition, the classification is achieved by relying on the balance of centrifugal force and airflow buoyancy. It has a weak ability to separate talc powder with near-critical particle size, and it is easy to produce coarse powder mixed with fine powder or fine powder mixed with coarse powder, making it difficult to produce talc powder products with narrow particle size distribution. Utility Model Content

[0004] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. Therefore, one objective of the present invention is to provide a talc classifier capable of precisely controlling the particle size of the finished fine powder and reducing the fine powder content in the coarse powder.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A talc classifier, comprising:

[0006] The machine housing has a feed inlet at its upper end and a discharge outlet at its lower end; an air inlet is provided on the side wall at the lower end of the machine housing.

[0007] A spindle assembly, wherein the spindle assembly is vertically arranged inside the housing, and the upper end of the spindle assembly is rotatably connected to the housing;

[0008] The first rotating cage is placed inside the housing and is fixedly mounted in the middle of the main shaft assembly. Multiple first grinding balls are fixedly arranged at equal intervals on the side wall of the first rotating cage, and multiple rotatable second grinding balls are provided at the bottom of the first rotating cage.

[0009] A material spreading disc is fixedly mounted on the main shaft assembly and is located below the first rotating drum.

[0010] The cyclone separator is provided in multiple ways. Each of the multiple cyclone separators is fixedly placed at one end of the housing, and the air inlet of each of the multiple cyclone separators is connected to the upper end of the housing.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, it also includes:

[0013] A drive unit is fixedly mounted on the upper end of the housing; the output end of the drive unit is connected to the end of the spindle assembly.

[0014] Furthermore, the driving device includes:

[0015] An electric motor, which is fixedly mounted on the upper end of the housing by a support;

[0016] The first pulley is fixedly mounted on the output end of the motor.

[0017] The second pulley extends from the top of the spindle assembly out of the housing. The second pulley is fixedly mounted on the top of the spindle assembly. The first pulley and the second pulley are connected by a belt.

[0018] Furthermore, it also includes:

[0019] A dripping device is placed inside the housing and fixedly connected to the inner wall of the housing. The dripping device is located at the lower end of the spreading disc.

[0020] Furthermore, it also includes:

[0021] The second rotating cage is placed inside the housing and at the lower end of the dripping device. The second rotating cage is fixedly connected to the main shaft assembly.

[0022] Furthermore, it also includes:

[0023] A jet ring is fixedly placed on the inner wall of the lower end of the housing, and the jet ring is arranged along the inner wall of the housing to form a ring structure; the jet ring is provided with a plurality of jet nozzles arranged sequentially at equal intervals, and the plurality of jet nozzles face the second rotating cage;

[0024] The air inlet of the jet ring is connected to the air inlet. The jet ring introduces airflow through the air inlet, and the airflow is ejected through the jet nozzle to form an air curtain inside the casing.

[0025] Furthermore, it also includes:

[0026] The upper end of the guide cylinder is connected to the feed inlet, and the lower end of the guide cylinder extends into the first rotating drum.

[0027] Furthermore, it also includes:

[0028] A discharge valve is fixedly placed at the discharge port of the machine housing.

[0029] The beneficial effects of this utility model are as follows: by using the fixed grinding ball of the first grinding ball for impact and the rotatable grinding ball of the second grinding ball for friction, a dual grinding structure is achieved, which can refine talc powder more quickly and thoroughly and prevent talc powder from adhering and clumping together; the graded design of airflow carrying and first rotating cage interception through hot airflow, combined with the efficient separation of cyclone, can accurately control the particle size of the finished fine powder, reduce the waste of qualified fine powder, and reduce the fine powder content in coarse powder. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a talc classifier according to the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the first rotating cage, the first grinding ball, and the second grinding ball of this utility model;

[0032] Figure 3 This is a top view of the jet ring of this utility model.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Casing; 2. Main shaft assembly; 3. First rotating drum; 4. First grinding ball; 5. Second grinding ball; 6. Feeding disc; 7. Cyclone; 8. Drive unit; 9. Drip device; 10. Second rotating drum.

[0035] 11. Jet ring; 1101. Jet nozzle;

[0036] 12. Feed guide cylinder; 13. Discharge valve. Detailed Implementation

[0037] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0038] like Figures 1 to 3 As shown, a talc classifier includes:

[0039] The machine housing 1 has a feed inlet at its upper end and a discharge outlet at its lower end; an air inlet is provided on the side wall at the lower end of the machine housing 1.

[0040] A spindle assembly 2 is vertically arranged inside the housing 1, and the upper end of the spindle assembly 2 is rotatably connected to the housing 1.

[0041] The first rotating cage 3 is placed inside the housing 1. The first rotating cage 3 is fixedly mounted in the middle of the main shaft assembly 2. Multiple first grinding balls 4 are fixedly arranged at equal intervals on the side wall of the first rotating cage 3. Multiple rotatable second grinding balls 5 are provided at the bottom of the first rotating cage 3.

[0042] The material spreading disc 6 is fixedly mounted on the main shaft assembly 2 and is located below the first rotating cage 3;

[0043] Cyclone 7, multiple cyclone 7 are provided, and multiple cyclone 7 are fixedly placed at one end of the housing 1. The air inlets of multiple cyclone 7 are connected to the upper end of the housing 1.

[0044] In practical applications, hot airflow is introduced through the air inlet of the casing, and the material enters the first rotating drum 3 from the feed inlet at the top of the casing. When the first rotating drum 3 rotates at high speed with the main shaft assembly 2, a strong centrifugal force field is formed inside and around it. When the material enters the first rotating drum 3, the centrifugal force generated by the rotation of the first rotating drum 3 has a stronger effect on coarse powder, causing it to be thrown to the outside of the rotating drum, detached from the airflow, and fall as coarse powder. The hot airflow has a more significant effect on fine powder, enabling it to overcome the centrifugal force and continue to rise through the gap of the first rotating drum 3, eventually entering the cyclone 7 for collection. This can more accurately separate the boundaries between coarse and fine powder and improve the classification accuracy.

[0045] The first grinding ball 4 on the side wall of the first rotating drum 3 rotates synchronously with the first rotating drum 3. The second grinding ball 5 at the bottom can rotate with the material flow and the first rotating drum 3. When the material flows inside and outside the first rotating drum 3, these first grinding balls 4 and second grinding balls 5 will collide and grind the incompletely dispersed talc powder agglomerates or coarse powder, breaking them into finer individual particles. This process is equivalent to adding an online fine crushing function in the grading process, which can reduce the fine powder mixed in the coarse powder and make the fine powder easier to be carried and separated by the hot airflow, thus improving the uniformity of product fineness.

[0046] Multiple first grinding balls 4 arranged at equal intervals are located in the middle of the inner side of the first rotating cage 3, and second grinding balls 5 are located at the bottom of the first rotating cage 3. During the rotation of the first rotating cage 3, the incompletely dispersed talc powder agglomerates, coarse powder and second grinding balls 5 rotate along the inner wall of the first rotating cage 3 under the action of centrifugal force. The multiple first grinding balls 4 limit the incompletely dispersed talc powder agglomerates, coarse powder and second grinding balls 5 during the rotation of the first rotating cage 3, so that the incompletely dispersed talc powder agglomerates, coarse powder and second grinding balls 5 are located at the bottom of the inner side of the first rotating cage 3 for rotation and grinding, thereby improving grinding efficiency.

[0047] Coarse powder falls onto the spreading disc 6 through the gap of the first rotating drum 3; the spreading disc 6 is fixedly mounted on the main shaft assembly 2 and rotates with the main shaft assembly 2. Under the action of centrifugal force, the coarse powder is thrown out radially and dispersed in the powder classifier chamber inside the casing 1; the dispersed coarse powder meets the rising hot airflow entering from the air inlet on the lower end side wall of the casing 1, and the fine powder carried in the coarse powder is carried away and separated by the hot airflow. The fine powder finally enters the cyclone 7, improving the uniformity of product fineness.

[0048] The above embodiments also include:

[0049] A drive device 8 is fixedly placed at the upper end of the housing 1; the output end of the drive device 8 is connected to the end of the spindle assembly 2.

[0050] In the above embodiments, the driving device 8 includes:

[0051] The motor is fixedly mounted on the upper end of the housing 1 by means of a support;

[0052] The first pulley is fixedly mounted on the output end of the motor.

[0053] The second pulley extends from the top of the main shaft assembly 2 out of the housing 1. The second pulley is fixedly mounted on the top of the main shaft assembly 2. The first pulley and the second pulley are connected by a belt.

[0054] In practical applications, the motor is fixed to the upper end of the housing 1 by a support. After starting, it drives the first pulley at the output end to rotate. The first pulley transmits power to the second pulley at the top of the main shaft assembly 2 through a belt, thereby driving the main shaft assembly 2 to rotate. The main shaft assembly 2 transmits the rotational power synchronously to the first rotating cage 3 and the spreading disc 6, ensuring that the two maintain a stable speed with the main shaft assembly 2, and ensuring the coordination of grinding and spreading actions.

[0055] This embodiment uses belt drive, which, compared to rigid connection, can reduce the impact load at startup and reduce wear on the motor and main shaft assembly 2. At the same time, belt drive has a certain degree of elasticity, which can absorb slight vibrations during operation and improve the stability of equipment operation. Belt drive has lower requirements for installation accuracy and is easy to debug on site. The motor is placed at the top of the housing 1, away from the dust area below, which can reduce the corrosion of the motor by dust and improve the reliability of the equipment.

[0056] The above embodiments also include:

[0057] A dripping device 9 is placed inside the housing 1 and fixedly connected to the inner wall of the housing 1. The dripping device 9 is located at the lower end of the spreading disc 6.

[0058] In practical applications, after the material is scattered in all directions by the feeding disc 6, some of the incompletely dispersed material clumps will fall to the dripping device 9. The dripping device 9 intercepts and diverts the falling coarse powder through its own structure, breaking up the agglomerated coarse powder and making the material more evenly dispersed. As the dispersed coarse powder continues to fall, it will come into full contact with the rising hot airflow introduced by the air inlet at the bottom of the casing 1. The qualified fine powder is carried upward by the hot airflow into the cyclone 7 and collected, while the coarse powder continues to fall to the discharge port at the bottom of the casing 1.

[0059] In this embodiment, the dripping device 9 further disperses the coarse powder thrown out by the feeding disc 6, effectively breaking up the coarse powder agglomeration and avoiding insufficient grinding or powder selection deviation caused by coarse powder clumping, thus ensuring the uniformity of subsequent hot airflow classification. The dispersed coarse powder has a larger contact area with the rising hot airflow, making the hot airflow's ability to carry fine powder more stable and improving powder selection accuracy. The dripping device 9 can slow down the falling speed of the coarse powder, prolonging the residence time of the coarse powder in the casing 1, giving the ground fine powder a greater chance to be captured by the hot airflow, thus improving the recovery rate of the finished fine powder. The dripping device 9 is located between the feeding disc 6 and the bottom of the casing 1, so it does not interfere with the rotation of the main shaft assembly 2 and can cooperate with the feeding, grinding, and airflow systems, making it suitable for the processing needs of easily agglomerated materials such as talc.

[0060] The above embodiments also include:

[0061] The second rotating cage 10 is placed inside the housing 1 and at the lower end of the dripping device 9. The second rotating cage 10 is fixedly connected to the main shaft assembly 2.

[0062] In practical applications, the material dispersed by the dripping device 9 continues to fall and enters the working area of ​​the second rotating cage 10. The second rotating cage 10, which rotates at high speed with the main shaft assembly 2, impacts and shears the falling particles again through its side wall structure, further refining the coarse powder that has not been sufficiently ground, and further reducing the particle size of the material. At the same time, the rotation of the second rotating cage 10 will create local airflow disturbance, which will cooperate with the rising airflow at the air inlet at the lower end of the casing 1: extremely fine particles can pass through the gap of the second rotating cage and flow back upward with the airflow, while the coarse powder that still does not meet the standard is intercepted by the second rotating cage 10 and thrown towards the inner wall of the casing, and finally falls down along the wall to the bottom discharge port.

[0063] This embodiment achieves stepped grinding of talc particles through the initial grinding of the first rotating drum 3 and the fine grinding of the second rotating drum 10. This can quickly break up large pieces of coarse powder and further refine the coarse powder, greatly improving the yield of fine powder. It is especially suitable for the fine processing requirements of high-purity talc. The second rotating drum 10 performs secondary screening of the coarse powder dispersed by the dripping device 9 through the dual action of physical interception and airflow disturbance, further separating coarse powder and fine powder, reducing the fine powder entrained in the coarse powder, reducing the cost of subsequent re-grinding, and improving the purity of the finished fine powder.

[0064] The above embodiments also include:

[0065] A jet ring 11 is fixedly placed on the inner wall of the lower end of the housing 1. The jet ring 11 is arranged along the inner wall of the housing 1 to form a ring structure. A plurality of jet nozzles 1101 are arranged sequentially at equal intervals on the jet ring 11. The plurality of jet nozzles 1101 face the second rotating cage 10.

[0066] The air inlet of the jet ring 11 is connected to the air inlet. The jet ring 11 introduces airflow through the air inlet, and the airflow is ejected through the jet nozzle 1101 to form an air curtain inside the housing 1.

[0067] In practical application, the air inlet at the lower end of the casing 1 guides the hot airflow into the jet ring 11. After the hot airflow is evenly distributed in the annular cavity, it is directionally sprayed onto the second rotating drum 10 through multiple equally spaced jet nozzles 1101. The sprayed hot airflow forms an annular air curtain around the second rotating drum 10. This air curtain works in conjunction with the original rising airflow inside the casing 1: on the one hand, the air curtain forms a barrier against the coarse powder thrown out by the second rotating drum 10, preventing the fine powder entrained in the coarse powder from diffusing to the inner wall of the casing, forcing the fine powder to re-enter the airflow circulation; on the other hand, the directional airflow impacts the surface of the second rotating drum 10, which can blow off the material attached to the rotating drum grid to avoid blockage, while enhancing the secondary dispersion of the coarse powder. The airflow of the air curtain supplements the intensity of the rising airflow, making it easier for the fine powder ground by the second rotating drum 10 to be carried to the upper area and enter the cyclone 7.

[0068] In this embodiment, the annular air curtain effectively intercepts fine powder entrained in coarse powder, reducing the loss of fine powder discharged with coarse powder and allowing more qualified fine powder to enter the cyclone 7. It is especially suitable for the recovery of high-value-added fine powders such as talc. The jet nozzle 1101 directionally blows the surface of the second rotating drum 10, which can remove the attached material in time, avoid the airflow obstruction or grinding efficiency reduction caused by the blockage of the rotating drum grid, and extend the continuous operation time of the equipment. The jet ring 11, through its annular layout and equally spaced jet nozzles 1101, makes the airflow in the lower part of the casing 1 form a uniform annular distribution, avoiding powder selection deviation caused by excessively strong or weak local airflow and improving the stability of classification accuracy.

[0069] The above embodiments also include:

[0070] The upper end of the guide cylinder 12 is connected to the feed inlet, and the lower end of the guide cylinder 12 extends into the first rotating cage 3.

[0071] In practical applications, after talc powder is fed into the feed port at the top of the casing 1, it directly enters the guide cylinder 12. Through the directional guidance of the guide cylinder 12, the talc powder is accurately conveyed into the interior of the first rotating drum 3, instead of being directly scattered into other areas of the casing 1. The talc powder entering the first rotating drum 3 can directly contact the first grinding ball 4 on the side wall of the first rotating drum 3 and the second grinding ball 5 at the bottom. Under the centrifugal force of the high-speed rotation of the first rotating drum 3, the talc powder is quickly thrown towards the grinding balls, immediately starting the grinding process and reducing the ineffective residence of the material in the casing 1. The closed channel structure of the guide cylinder 12 can prevent the phenomenon of flying material due to airflow disturbance when the talc powder is fed, and prevent the talc powder from being carried into the cyclone 7 by the airflow before entering the grinding area, thus preventing coarse powder in the talc powder from entering the cyclone 7.

[0072] The above embodiments also include:

[0073] Discharge valve 13 is fixedly placed at the discharge port of the housing 1.

[0074] In practical applications, after multi-stage grinding and grading, the coarse powder that does not meet the standards falls to the bottom of the casing 1 and is temporarily stored above the discharge port. The discharge valve 13 is opened or closed manually or automatically. When the coarse powder accumulates to a certain amount, the discharge valve 13 opens to discharge the coarse powder from the casing 1. After the discharge is completed, the valve closes to prevent untreated external air from entering the casing 1 directly. The opening and closing rhythm of the discharge valve 13 can be matched with the equipment operating parameters to ensure that the airflow balance inside the casing 1 is not disrupted while discharging the coarse powder.

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A talc classifier, characterized in that, include: The machine housing has a feed inlet at its upper end and a discharge outlet at its lower end. An air inlet is provided on the lower end side wall of the housing; A spindle assembly, wherein the spindle assembly is vertically arranged inside the housing, and the upper end of the spindle assembly is rotatably connected to the housing; The first rotating cage is placed inside the housing and is fixedly mounted in the middle of the main shaft assembly. Multiple first grinding balls are fixedly arranged at equal intervals on the side wall of the first rotating cage, and multiple rotatable second grinding balls are provided at the bottom of the first rotating cage. A material spreading disc is fixedly mounted on the main shaft assembly and is located below the first rotating drum. The cyclone separator is provided in multiple ways. Each of the multiple cyclone separators is fixedly placed at one end of the housing, and the air inlet of each of the multiple cyclone separators is connected to the upper end of the housing.

2. The talc classifier according to claim 1, characterized in that, Also includes: A drive unit is fixedly mounted on the upper end of the housing; the output end of the drive unit is connected to the end of the spindle assembly.

3. The talc classifier according to claim 2, characterized in that, The driving device includes: An electric motor, which is fixedly mounted on the upper end of the housing by a support; The first pulley is fixedly mounted on the output end of the motor. The second pulley extends from the top of the spindle assembly out of the housing. The second pulley is fixedly mounted on the top of the spindle assembly. The first pulley and the second pulley are connected by a belt.

4. The talc classifier according to claim 1, characterized in that, Also includes: A dripping device is placed inside the housing and fixedly connected to the inner wall of the housing. The dripping device is located at the lower end of the spreading disc.

5. The talc classifier according to claim 4, characterized in that, Also includes: The second rotating cage is placed inside the housing and at the lower end of the dripping device. The second rotating cage is fixedly connected to the main shaft assembly.

6. The talc classifier according to claim 5, characterized in that, Also includes: A jet ring is fixedly placed on the inner wall of the lower end of the housing, and the jet ring is arranged along the inner wall of the housing to form a ring structure; the jet ring is provided with a plurality of jet nozzles arranged sequentially at equal intervals, and the plurality of jet nozzles face the second rotating cage; The air inlet of the jet ring is connected to the air inlet. The jet ring introduces airflow through the air inlet, and the airflow is ejected through the jet nozzle to form an air curtain inside the casing.

7. The talc classifier according to claim 1, characterized in that, Also includes: The upper end of the guide cylinder is connected to the feed inlet, and the lower end of the guide cylinder extends into the first rotating drum.

8. The talc classifier according to claim 1, characterized in that, Also includes: A discharge valve is fixedly placed at the discharge port of the machine housing.

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