Talc screening device and screening method thereof

Abstract

The application discloses a talc screening device and a screening method thereof. The talc screening device comprises a support, a roller, a pushing mechanism and a water supply mechanism. The roller is rotationally connected with the support. The roller is obliquely arranged relative to the support, so that one end of the roller is a high-position end, and the other end of the roller is a low-position end. A feeding position and a first waste stone discharging position are arranged on one side of the high-position end. A talc discharging position is arranged on one side of the low-position end. The feeding position, the first waste stone discharging position and the talc discharging position are all in communication with the inside of the roller. The roller has a sliding material area and a screening area. The feeding position and the talc discharging position are communicated through the sliding material area. The roller is used for rotating to drive the stone in the inside of the roller to be lifted from the sliding material area to the screening area. The pushing mechanism is connected with the support and arranged in the screening area corresponding to the first waste stone discharging position. The pushing mechanism moves towards the first waste stone discharging position. The water supply mechanism is connected with the support and arranged in the inside of the roller. The friction loss between the waste stone and the inner wall of the roller is effectively reduced, and the impurity content of the screened talc is reduced.

Description

Technical Field

[0001] This invention relates to the field of mineral processing equipment technology, and in particular to a talc screening device and screening method. Background Technology

[0002] Talc is an important industrial raw material, widely used in the paper, daily chemical, pharmaceutical, and rubber industries. my country has a long history of talc mining. Currently, the mining process mostly relies on manual methods to separate the large amount of impurities from the talc. This method is labor-intensive, inefficient, and results in incomplete separation. Small, broken talc particles cannot be picked out manually, leading to significant losses of mineral resources. Therefore, talc washing and screening machines are needed for proper screening.

[0003] Currently, talc washing and screening machines are commonly used to screen talc. Specifically, the stone material mixed with talc and other stones enters the drum of the talc washing and screening machine from the higher side of the drum. Due to the difference in friction between talc and other stones on the inner wall of the drum, the talc and other stones can be separated. Then, the separated stones are scraped off by scraping devices and other devices, while the talc slides towards the lower end of the inclined drum. Finally, the talc is removed from the lower end of the drum, completing the screening of talc and other stones.

[0004] However, in existing talc washing and sorting machines, the impurities are basically moved out of the drum from the lower end along with the talc. During the process of the impurities moving from the higher end of the drum to the lower end, they need to rub against the inner wall of the drum multiple times. That is, the inner wall of the drum needs to come into contact with the impurities with high friction. This causes the inner wall of the drum to wear out quickly, which in turn shortens the service life of the drum. Furthermore, since the impurities need to move together with the talc inside the drum, it is easy for the impurities to be mixed into the talc and moved out with it, resulting in a high impurity content in the sorted talc. Summary of the Invention

[0005] To address the above shortcomings, this invention provides a talc screening device and method that can reduce wear between the stone and the inner wall of the drum and produce talc with a low impurity content after screening.

[0006] To achieve the above objectives, the present invention provides a talc screening device, comprising: support; A roller is rotatably connected to the support. The roller is inclined relative to the support, such that one end of the roller is a high end and the other end is a low end. A feed position and a first miscellaneous stone discharge position are provided on one side of the high end, and a talc discharge position is provided on one side of the low end. The feed position, the first miscellaneous stone discharge position, and the talc discharge position are all connected to the inside of the roller. The roller has a sliding zone and a screening zone. The feed position and the talc discharge position are connected through the sliding zone. The roller is used to rotate to lift the stone inside the roller from the sliding zone to the screening zone. A vibrating feeder is connected to the support frame and is connected to the feed position; A pushing mechanism is connected to the support frame. The pushing mechanism is located in the screening area corresponding to the first stone discharge position. The pushing mechanism moves toward the first stone discharge position. A water supply mechanism is connected to the support and is located inside the drum.

[0007] In some embodiments, the pushing mechanism includes a brush, a transmission chain, and a pushing motor. The pushing motor is connected to the bracket, and the transmission chain is connected to the pushing motor. Multiple brushes are provided, and the multiple brushes are arranged sequentially at intervals along the length direction of the transmission chain and are all connected to the transmission chain. The brushes abut against the inner wall of the roller, and the transmission chain is used to drive the brushes to move towards the first aggregate discharge position.

[0008] In some embodiments, the talc screening device further includes a first roller brush, which is rotatably connected to the bracket. The first roller brush is located on the side of the screening area away from the talc area. The axial direction of the first roller brush is the same as the axial direction of the drum, and the sidewall of the first roller brush abuts against the inner wall of the drum.

[0009] In some embodiments, the talc screening device further includes a second roller brush, which is connected to the bracket and disposed inside the drum. The second roller brush is located on the side of the first roller brush near the screening area. A second miscellaneous stone discharge position is also provided on the lower end side. The second miscellaneous stone discharge position is in communication with the inside of the drum. The second roller brush is set corresponding to the second miscellaneous stone discharge position, and the side wall of the second roller brush abuts against the inner wall of the drum.

[0010] In some embodiments, the talc screening device further includes a drive mechanism connected to the roller.

[0011] In some embodiments, the drive mechanism includes a drive motor and a drive wheel, the drive wheel being connected to the power output shaft of the drive motor; the outer periphery of the roller is provided with a protrusion, and the drive wheel abuts against the protrusion.

[0012] In some embodiments, the water supply mechanism includes a water supply pipe connected to the support and disposed inside the roller, and the water supply pipe has multiple water outlet holes.

[0013] In some embodiments, the talc screening device further includes an identification mechanism connected to the support, the identification mechanism being used to photograph the stone inside the drum.

[0014] In some embodiments, the talc screening device further includes a control mechanism, wherein the vibrating feeder, the pushing mechanism, the water supply mechanism, and the identification mechanism are all electrically connected to the control mechanism, and the control mechanism is used to control the working status and signal transmission and reception of the vibrating feeder, the pushing mechanism, the water supply mechanism, and the identification mechanism.

[0015] A screening method applied to the above-mentioned talc screening device includes the following steps: S1. The water supply mechanism sprays water into the inside of the drum, and the material pushing mechanism is activated; S2. The stone material enters the sliding zone from the feeding position; S3. The roller rotates to move the stone in the sliding zone along the rotation direction of the roller. The stone with friction between it and the roller that is greater than the preset friction is lifted to the screening zone. The pushing mechanism pushes the stone in the screening zone to the first miscellaneous stone discharge position. The stone with friction between it and the roller that is less than the preset friction slides down to the sliding zone and moves along the sliding zone to the talc discharge position.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the support bracket provides support for the drum, enabling the drum to rotate. A mixture of talc and miscellaneous stones enters the drum through the feed inlet. Under gravity, the stones accumulate in the slippery area at the bottom of the drum and move along the slippery area towards the talc outlet at the lower end of the drum. The drum rotates to move the stones in the direction of rotation, i.e., from the slippery area to the screening area. Due to the low friction between the talc and the inner wall of the drum, it slides back down to the slippery area at the bottom of the drum after moving a certain distance. The miscellaneous stones, due to the high friction between the talc and the drum, move further than the talc and eventually reach the screening area. During the drum rotation, the talc inside the drum cannot move to the screening area, while the miscellaneous stones are driven by the drum to reach the screening area and move there for a longer period. The pushing mechanism pushes the miscellaneous stones in the screening area, causing them to exit the drum from the first miscellaneous stone outlet at the higher end of the drum. The talc moves along the slippery area to the talc outlet and exits the drum, thus achieving the separation of the miscellaneous stones and talc. With the above settings, the stones can pass through the screening area and exit the drum via the first stone discharge displacement after entering the drum. The stones do not need to move from the high end to the low end of the drum together with the talc, which reduces the contact area between the inner wall of the drum and the stones, effectively reducing frictional wear between the stones and the inner wall of the drum and improving the service life of the drum. In addition, reducing the residence time of the stones in the drum effectively prevents the stones from mixing with the talc and reduces the impurity content in the talc after screening. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the structure of the lower end of the talc screening device according to an embodiment of the present invention.

[0019] Figure 2 This is a front view of the lower end side of a talc screening device according to an embodiment of the present invention.

[0020] Figure 3 This is a side view of a talc screening device according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the internal support structure of the drum in a talc screening device according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the internal structure of the drum in a talc screening device according to an embodiment of the present invention.

[0023] In the diagram, 100 is the support frame; 110 is the vibrating feeder; 200 is the drum; 201 is the feed position; 202 is the first waste stone discharge position; 203 is the talc discharge position; 204 is the second waste stone discharge position; 205 is the protrusion; 210 is the sliding zone; 220 is the screening zone; 300 is the pushing mechanism; 310 is the brush; 320 is the transmission chain; 330 is the pushing motor; 400 is the water supply mechanism; 410 is the water supply pipe; 500 is the first roller brush; 600 is the second roller brush; 700 is the drive mechanism; 710 is the drive motor; 720 is the drive wheel; and 800 is the identification mechanism. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, Figure 1 A schematic diagram of the structure of one side of the lower end of the talc screening device according to an embodiment of the present invention is shown. Figure 2 This is a front view of the lower end side of a talc screening device according to an embodiment of the present invention. Figure 3A schematic diagram of the structure of a talc screening device according to an embodiment of the present invention is shown. The present invention provides a talc screening device, which includes a support 100, a drum 200, a vibrating feeder 110, a pushing mechanism 300, and a water supply mechanism 400. The drum 200 is rotatably connected to the support 100 and is inclined relative to the support 100, such that one end of the drum 200 is a high end and the other end is a low end. A feed position 201 and a first miscellaneous stone discharge position 202 are provided on one side of the high end, and a talc discharge position 203 is provided on one side of the low end. The feed position 201, the first miscellaneous stone discharge position 202, and the talc discharge position 203 are all connected to the interior of the drum 200. The drum 200 has a talc material zone 210 and a screening zone 220. The feed position 201 and the talc discharge position... Position 203 is connected to the sliding area 210. The roller 200 is used to rotate to lift the stone inside the roller 200 from the sliding area 210 to the screening area 220. The vibrating feeder 110 is connected to the support 100 and is connected to the feeding position. The pushing mechanism 300 is connected to the support 100 and is located in the screening area 220 corresponding to the first miscellaneous stone discharge position 202. The pushing mechanism 300 moves towards the first miscellaneous stone discharge position 202. The water supply mechanism 400 is connected to the support 100 and is located inside the roller 200.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, in some preferred embodiments, the roller 200 is inclined on the support 100, so that one end of the roller 200 is higher and the other end is lower, forming a high end and a low end. The vibrating feeder 110 provides stone to the feed position 201. The roller 200 can rotate around its own central axis. The water supply mechanism 400 is used to spray water on the inner wall of the roller 200, so that the inner wall of the roller 200 remains slippery, thereby reducing the friction between the stone and the inner wall of the roller 200. The pushing mechanism 300 is located inside the roller 200 and is used to push the miscellaneous stones in the screening area 220 out of the roller 200 from the first miscellaneous stone discharge position 202. The talc slides from the high end to the talc discharge position 203 at the low end to complete the screening of talc and miscellaneous stones.

[0029] In use, the water supply mechanism 400 is turned on to keep the inner wall of the drum 200 moist. The mixture of talc and aggregate enters the drum 200 through the feed position 201. The vibrating feeder 110 pushes the stone to the feed position 201, allowing it to enter the drum 200. The stone falls to the bottom of the drum 200, i.e., the slippery area 210. The rotation of the drum 200 causes the stone to move in the direction of rotation, thus lifting it towards the screening area 220. Because the frictional force on the inner wall of the drum 200 is greater than that on the talc, the aggregate... The longer movement distance allows the aggregate to move from the sliding zone 210 to the screening zone 220, while the talc cannot be lifted to the screening zone 220. The pushing mechanism 300 continues to operate, pushing the aggregate in the screening zone 220 to the first aggregate discharge position 202, thereby screening the aggregate. The talc slides down from the high end of the sliding zone 210 to the talc discharge position 203 at the low end, and moves out of the roller 200 from the talc discharge position 203. During this process, the talc is continuously lifted to a certain height by the roller 200 and then falls back to the sliding zone 210 to ensure that the talc can slide along the sliding zone 210.

[0030] It should be noted here that, as Figure 2 As shown, the sliding zone 210 is the bottom area of ​​the drum 200, allowing the stone to slide from the high end to the low end in this area. The screening zone 220 is located on one side of the sliding zone 210. Since the drum 200 is a cylindrical structure, the horizontal height of the screening zone 220 is higher than that of the corresponding sliding zone 210, so that the rotation of the drum 200 can drive the stone from the sliding zone 210 to the screening zone 220. The vibrating feeder 110 can control the speed at which the stone enters the drum 200, avoiding the stone entering the drum 200 at too slow a speed, resulting in low efficiency, or at too fast a speed, resulting in poor screening effect.

[0031] With the above configuration, after the aggregate enters the drum 200, it moves to the screening area 220 under the drive of the drum 200 and exits the drum 200 through the first aggregate discharge position 202 at the high end, completing the screening. The aggregate only moves at the high end, effectively reducing the residence time of the aggregate in the drum 200 and limiting the contact area between the aggregate and the drum 200 to the high end, reducing friction between the aggregate and the inner wall of the drum 200, reducing wear of the drum 200, and increasing the service life of the drum 200. In addition, the short residence time of the aggregate in the drum 200 reduces the mixing time between the aggregate and talc, and the aggregate and talc move out of the drum 200 from opposite directions, effectively preventing the aggregate from re-mixing with the talc during the screening process, effectively reducing the aggregate content in the talc after screening.

[0032] Furthermore, because the contact area between the stones and the roller 200 is small, the wear of the roller 200 is reduced, resulting in less iron content in the talc and stones obtained from screening. This further reduces the impurity rate of the screened stone, facilitating subsequent production. Currently, to prevent wear and damage to the roller 200 during long-term use, it is usually made of high-quality, high-hardness metal materials, such as hard alloy steel and composite steel. Through the above settings, the material for the roller 200 can be selected according to the usage requirements, using relatively lower-quality metal materials, such as ordinary structural steel and low-carbon steel, while still achieving good performance, thereby reducing production costs.

[0033] In some embodiments, the feeding mechanism 300 includes a brush 310, a transmission chain 320, and a feeding motor 330. The feeding motor 330 is connected to the bracket 100, and the transmission chain 320 is connected to the feeding motor 330. Multiple brushes 310 are provided, and the multiple brushes 310 are arranged sequentially at intervals along the length direction of the transmission chain 320 and are all connected to the transmission chain 320. The brushes 310 abut against the inner wall of the roller 200, and the transmission chain 320 is used to drive the brushes 310 to move towards the first aggregate discharge position 202.

[0034] like Figure 1 , Figure 2 and Figure 4 As shown, in some preferred embodiments, the pusher motor 330, the transmission chain 320, and the brushes 310 are all located inside the drum 200. The transmission chain 320 forms a ring structure, allowing it to rotate cyclically. Multiple brushes 310 are sequentially and spaced apart from the transmission chain 320, and the pusher motor 330 drives the transmission chain 320 and the brushes 310 to move. The brushes 310 abut against the inner wall of the drum 200 and move towards the first stone discharge position 202 under the drive of the transmission chain 320. The brushes 310 push the stones located in the screening area 320 out of the drum 200 from the first stone discharge position 202. With the above arrangement, the brushes 310 can push the stones out of the drum 200. The brushes 310 have a large coverage area and a good stone cleaning effect, effectively preventing stones from remaining inside the drum 200.

[0035] In some embodiments, the talc screening device further includes a first roller brush 500, which is rotatably connected to the support 100. The first roller brush 500 is located on the side of the screening area 220 away from the slippery area 210. The axial direction of the first roller brush 500 is the same as the axial direction of the drum 200, and the sidewall of the first roller brush 500 abuts against the inner wall of the drum 200.

[0036] like Figure 1 , Figure 2 and Figure 5As shown, in some preferred embodiments, the first roller brush 500 abuts against the inner wall of the roller 200 and is located on the side of the screening area 220 away from the sliding area 210. It is easily understood that if the stone moves a distance beyond the screening area 220 under the influence of the roller 200, it will come into contact with the first roller brush 500. This arrangement prevents the stone from rising above the screening area 220, thus preventing some stones from crossing the screening area 220 and failing to be pushed out of the roller 200 by the pushing mechanism 300 to complete the screening.

[0037] Furthermore, in actual production, small-diameter gravel may remain in the stone. This gravel, upon contact with water inside the drum 200, easily adheres to the inner wall of the drum 200 and continues to rotate. Prolonged use can lead to a large amount of gravel adhering to the inner wall of the drum 200, affecting its normal operation. By installing a first roller brush 500, the gravel can be brushed off and pushed to the first waste stone discharge position 202 by the pushing mechanism 300, preventing a large amount of gravel from adhering to the inner wall of the drum 200 and affecting the talc screening effect. The first roller brush 500 also cleans the inner wall of the drum 200. Specifically, after stone screening, the drum 200 and the first roller brush 500 can be driven to rotate, and the first roller brush 500 cleans the inner wall of the drum 200.

[0038] In some embodiments, the talc screening device further includes a second roller brush 600, which is connected to the support 100 and disposed inside the drum 200. The second roller brush 600 is located on the side of the first roller brush 500 near the screening area 220. A second miscellaneous stone discharge position 204 is also provided on the lower end side, which is connected to the inside of the drum 200. The second roller brush 600 is disposed corresponding to the second miscellaneous stone discharge position 204, and the side wall of the second roller brush 600 abuts against the inner wall of the drum 200.

[0039] like Figure 1 , Figure 2 and Figure 5As shown, in some preferred embodiments, the second roller brush 600 is located below the first roller brush 500, and the length of the second roller brush 600 is less than the length of the first roller brush 500. In use, the first roller brush 500 is used to brush off the gravel inside the drum 200. Some gravel may get stuck between the first roller brush 500 and the drum 200. The gravel stuck between the first roller brush 500 and the drum 200 moves towards the lower end of the drum 200. When a certain amount of gravel accumulates at the lower end between the first roller brush 500 and the drum 200, this part of the gravel at the lower end will slide down the drum 200 (i.e., towards the screening area 220 and the sliding area 210). The second roller brush 600 can receive this part of gravel and push it towards the second waste stone discharge position 204, thereby removing it from the drum 200 and preventing the gravel from accumulating inside the drum 200. The above settings can prevent crushed stone from accumulating inside the drum 200 and reduce the impurity content in the talc after screening.

[0040] In some embodiments, the talc screening device further includes a drive mechanism 700 connected to the drum 200.

[0041] like Figure 1 and Figure 2 As shown, the drive mechanism 700 is used to drive the roller 200 to rotate. The drive mechanism 700 can be an electric motor, diesel engine, etc. Through the above settings, the rotation of the roller 200 can be controlled, thereby adjusting the speed of the roller 200 to a suitable level.

[0042] In some embodiments, the drive mechanism 700 includes a drive motor 710 and a drive wheel 720, the drive wheel 720 being connected to the power output shaft of the drive motor 710; the outer periphery of the roller 200 is provided with a protrusion 205, and the drive wheel 720 abuts against the protrusion 205.

[0043] like Figure 1 and Figure 2 As shown, in some preferred embodiments, the protrusion 205 has an annular structure, and the protrusion 205 is arranged around the outer periphery of the roller 200. The drive motor 710 drives the drive wheel 720 to rotate, and the drive wheel 720 drives the protrusion 205 and the roller 200 to rotate. With the above arrangement, the rotation of the roller 200 can be controlled. The drive wheel 720 and the protrusion 205 abut against each other, making the rotation of the roller 200 more stable, reducing the vibration when the roller 200 rotates, and the protrusion 205 has a stable structure and is not easily damaged after long-term use.

[0044] Furthermore, the drive wheel 720 can be made of soft materials, such as rubber, which can reduce friction on the protrusions 205 of the roller 200, reduce wear on the roller 200, further reduce vibration when the roller 200 rotates, and improve the stability of the roller 200 when rotating.

[0045] In some embodiments, the talc screening device also includes an identification mechanism 800 connected to the support 100, which is used to capture images of the stone inside the roller 200.

[0046] like Figure 1 and Figure 2 As shown, in some preferred embodiments, the identification mechanism 800 may be an AI recognition camera. The identification mechanism 800 is located inside the roller 200 and faces the sliding area 210 and the screening area 220 to capture the movement of the stone in the sliding area 210 and the screening area 220. In use, the roller 200 rotates to drive the stone to move. When the stone moves from the sliding area 210 to the screening area 220, the identification mechanism 800 identifies and records the trajectory of the stone. If the stone is not pushed out of the roller 200 by the pushing mechanism 300 and removed from the talc discharge position 203 during subsequent movement, the operator is prompted that there are impurities mixed in with the talc and it is removed from the talc discharge position 203. The operator can remove the impurities by screening through the captured video or pictures, thereby avoiding the inclusion of impurities in the screened talc and reducing the impurity content of the talc. The above settings can effectively identify the unscreened stones during the screening process and prompt the operator to remove them, effectively reducing the impurity content of talc after screening, and eliminating the need for manual identification, thus improving identification efficiency and accuracy.

[0047] It should be noted that the above-mentioned method for identifying the movement trajectory of stone is a feasible existing technology, which will not be elaborated on here.

[0048] In some embodiments, the talc screening device also includes a control mechanism (not shown in the figure). The vibrating feeder 110, the pushing mechanism 300, the water supply mechanism 400 and the identification mechanism 800 are all electrically connected to the control mechanism. The control mechanism is used to control the working status and signal transmission and reception of the vibrating feeder 110, the pushing mechanism 300, the water supply mechanism 400 and the identification mechanism 800.

[0049] The control mechanism can receive relevant signals from the identification mechanism 800, thereby recording the running trajectory of the stone inside the drum 200 to adjust the operating status of each mechanism in real time. Specifically, if the stone inside the drum 200 is all piled up in the sliding area 210, the vibrating feeder 110 is controlled to reduce the feeding amount to avoid the stone being unable to be screened due to excessive stone inside the drum 200; if the miscellaneous stones move to the screening area 220 and then return to the sliding area 210, the control mechanism controls the pushing mechanism 300 to increase its operating speed to ensure that the miscellaneous stones entering the screening area 220 can be pushed to the first miscellaneous stone discharge position 202; if the running trajectory of the stone inside the drum 200 fluctuates greatly, the water supply mechanism 400 is controlled to increase the water spray volume. It should be noted that the above scheme is only a partial feasible embodiment and does not limit the specific implementation scheme. Through the above settings, the operating status of multiple mechanisms can be adjusted in real time according to the activity of the stone to ensure that the stone screening is carried out normally, improve the level of automation, and save time and effort in operation.

[0050] In some embodiments, the water supply mechanism 400 includes a water supply pipe 410, which is connected to the support 100 and located inside the roller 200. The water supply pipe 410 has multiple water outlet holes (not shown in the figure).

[0051] like Figure 1 , Figure 2 and Figure 5 As shown, in some preferred embodiments, a water supply pipe 410 is disposed inside the drum 200, with its length direction parallel to the axial direction of the drum 200. Multiple water outlets are sequentially spaced along the length of the water supply pipe 410, allowing liquid to be sprayed into the interior of the drum 200 through these outlets, thus wetting the inner wall of the drum 200. This arrangement ensures that water is evenly sprayed onto the inner wall of the drum 200, guaranteeing uniform water coverage and preventing uneven friction due to partial lack of water coverage, which could negatively impact the screening effect. Furthermore, spraying water into the drum 200 effectively reduces dust generated when the stone slides or rolls within the drum, thereby improving the working environment.

[0052] In some embodiments, the talc screening device further includes a conveyor belt (not shown in the figure), which is located at a high end and is set corresponding to the first waste stone discharge position 202.

[0053] like Figure 1 , Figure 2 and Figure 3As shown, in some preferred embodiments, the conveyor belt is located below the discharge position of the first waste stone discharge position 202, so that the waste stones removed from the roller 200 from the first waste stone discharge position 202 can fall onto the conveyor belt. The conveyor belt is used to transport the waste stones to the waste stone storage area or to other processes. With the above arrangement, the screened waste stones can be moved to the designated position without manual operation, improving the level of automation and saving time and effort in operation.

[0054] In some embodiments, the talc screening device further includes a support (not shown) connected to the bottom end of the support 100.

[0055] In some preferred embodiments, the bracket 100 has multiple support rods, with supports connected to the lower ends of the support rods and resting on a support surface such as the ground. This arrangement improves the stability of the support.

[0056] A screening method applied to the above-mentioned talc screening device includes the following steps: S1. The water supply mechanism 400 sprays water into the inside of the drum 200, and the material pushing mechanism 300 is started; S2. The stone material enters the slip zone 210 from the feeding position 201; S3. The roller 200 rotates to move the stone in the sliding zone 210 along the rotation direction of the roller 200. The stone with friction with the roller 200 greater than the predetermined friction is lifted to the screening zone 220. The pushing mechanism 300 pushes the stone in the screening zone 220 to the first miscellaneous stone discharge position 202. The stone with friction with the roller 200 less than the predetermined friction slides down to the sliding zone 210 and moves along the sliding zone 210 to the talc discharge position 203.

[0057] like Figure 1 , Figure 2 and Figure 3As shown, in some preferred embodiments, when talc needs to be screened using the aforementioned talc screening device, the water supply mechanism 400 is activated to spray water into the inside of the drum 200, and the pushing mechanism 300 is activated to start operation; a mixture of talc and miscellaneous stones is added into the drum 200, with the stones entering the drum 200 from the feed position 201. After entering the drum 200, the stones fall to the bottom position of the drum 200 (i.e., the talc area); the drum 200 is driven to rotate. Since the inner wall of the drum 200 rotates through the lowest point during the rotation, the inner wall of the drum 200 can be covered with water, and the friction between the stones and the drum 200 is greater than that of the roller 200. The stones with a predetermined friction force are mixed stones. Among the stones, those with less friction with the roller 200 are talc. As the roller 200 rotates, the mixed stones with greater friction are lifted more by the roller 200 and can move to the screening area 220. The pushing mechanism 300 pushes the mixed stones that have moved to the screening area 220 to the first mixed stone discharge position 202 to remove them from the roller 200. The talc with less friction is lifted less and can fall back to the sliding area 210 at the bottom of the roller 200. The talc can slide along the sliding area 210 from the high end to the low end of the talc discharge position 203 and finally remove them from the roller 200 to complete the screening of talc and mixed stones.

[0058] It should be noted that the predetermined friction force is set in advance based on the friction force between the aggregate and the inner wall of the roller 200 and the friction force between the talc and the inner wall of the roller 200. That is, the predetermined friction force is less than the friction force between the aggregate and the inner wall of the roller 200 and greater than the friction force between the talc and the inner wall of the roller 200. Specifically, when the friction force between the stone and the roller 200 is equal to the predetermined friction force, the stone can be moved to the boundary position between the screening area 220 and the sliding area 210 under the drive of the roller 200. This allows the aggregate with a friction force greater than the predetermined friction force to be lifted to the screening area, while the talc with a friction force less than the predetermined friction force cannot be lifted to the screening area 220, thereby achieving the screening of talc and aggregate. Furthermore, the distance the stone is lifted within the drum 200 is also related to the weight of the stone itself. That is, heavier stones cannot be lifted to the screening area 220 by the drum 200 due to their greater gravity. It should be noted that the stone needs to be screened before entering the talc screening device to ensure that the stones entering the talc screening device are all small in size, so as to avoid inaccurate screening due to excessively large stones.

[0059] The above method can be used to screen talc and miscellaneous stones, reduce the time that miscellaneous stones stay in the drum 200, reduce the wear of the drum 200 by the miscellaneous stones, improve the service life of the drum 200, and prevent the miscellaneous stones and talc from mixing, thereby reducing the impurity content of the talc after screening.

[0060] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A talc screening device, characterized in that, include: support; A roller is rotatably connected to the support. The roller is inclined relative to the support, such that one end of the roller is a high end and the other end is a low end. A feed position and a first miscellaneous stone discharge position are provided on one side of the high end, and a talc discharge position is provided on one side of the low end. The feed position, the first miscellaneous stone discharge position, and the talc discharge position are all connected to the inside of the roller. The roller has a sliding zone and a screening zone. The feed position and the talc discharge position are connected through the sliding zone. The roller is used to rotate to lift the stone inside the roller from the sliding zone to the screening zone. A vibrating feeder is connected to the support frame and is connected to the feed position; A pushing mechanism is connected to the support frame. The pushing mechanism is located in the screening area corresponding to the first stone discharge position. The pushing mechanism moves toward the first stone discharge position. A water supply mechanism is connected to the support and is located inside the drum.

2. The talc screening device according to claim 1, characterized in that, The pushing mechanism includes a brush, a transmission chain, and a pushing motor. The pushing motor is connected to the bracket, and the transmission chain is connected to the pushing motor. Multiple brushes are provided, and the multiple brushes are arranged sequentially at intervals along the length direction of the transmission chain and are all connected to the transmission chain. The brushes abut against the inner wall of the roller, and the transmission chain is used to drive the brushes to move towards the first aggregate discharge position.

3. The talc screening device according to claim 1, characterized in that, It also includes a first roller brush, which is rotatably connected to the bracket. The first roller brush is located on the side of the screening area away from the sliding area. The axial direction of the first roller brush is the same as the axial direction of the drum, and the sidewall of the first roller brush abuts against the inner wall of the drum.

4. The talc screening device according to claim 3, characterized in that, It also includes a second roller brush, which is connected to the bracket and disposed inside the drum. The second roller brush is located on the side of the first roller brush near the screening area. A second stone discharge position is also provided on the lower end side. The second stone discharge position is connected to the inside of the drum. The second roller brush is set corresponding to the second stone discharge position. The side wall of the second roller brush abuts against the inner wall of the drum.

5. The talc screening device according to claim 1, characterized in that, It also includes a drive mechanism, which is connected to the roller.

6. The talc screening device according to claim 5, characterized in that, The drive mechanism includes a drive motor and a drive wheel, the drive wheel being connected to the power output shaft of the drive motor; the outer periphery of the roller is provided with a protrusion, and the drive wheel abuts against the protrusion.

7. The talc screening device according to claim 1, characterized in that, The water supply mechanism includes a water supply pipe, which is connected to the support and located inside the drum. The water supply pipe has multiple water outlet holes.

8. The talc screening device according to claim 1, characterized in that, It also includes an identification mechanism connected to the bracket, which is used to photograph the stone inside the drum.

9. The talc screening device according to claim 8, characterized in that, It also includes a control mechanism, wherein the vibrating feeder, the pushing mechanism, the water supply mechanism and the identification mechanism are all electrically connected to the control mechanism, and the control mechanism is used to control the working status and signal transmission and reception of the vibrating feeder, the pushing mechanism, the water supply mechanism and the identification mechanism.

10. A screening method applied to the talc screening apparatus according to any one of claims 1-9, characterized in that, Including the following steps: S1. The water supply mechanism sprays water into the inside of the drum, and the material pushing mechanism is activated; S2. The stone material enters the sliding zone from the feeding position; S3. The roller rotates to move the stone in the sliding zone along the rotation direction of the roller. The stone with friction between it and the roller that is greater than the preset friction is lifted to the screening zone. The pushing mechanism pushes the stone in the screening zone to the first miscellaneous stone discharge position. The stone with friction between it and the roller that is less than the preset friction slides down to the sliding zone and moves along the sliding zone to the talc discharge position.

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