Powder shaping device and granulating device for ceramic tile dry method powder production system

Abstract

The application discloses a powder shaping device and a granulating device for a ceramic tile dry-method powder production system, and relates to the field of ceramic tile production equipment. The powder shaping device is used for processing primary powder obtained by humidifying ceramic tile micro powder; and the device comprises a feeding mechanism, a roller, a discharging mechanism and a roller driving device, the feeding mechanism is communicated with the feeding end of the roller, the discharging mechanism is communicated with the discharging end of the roller, the inner wall of the roller is provided with one or more convex portions in the circumferential direction of the roller, the primary powder is conveyed from the feeding end to the discharging end of the roller under the driving of the roller rotation, and the primary powder rolls and climbs over the convex portions under the obstruction of the convex portions, so that the particles in the primary powder are mixed by mutual adhesion, the particle size is increased, and the particles tend to be spherical. Based on the powder shaping device, the particle grading of the powder can be improved, and the flowability of the powder can be improved.

Description

Technical Field

[0001] This invention relates to the field of ceramic tile production equipment, and in particular to a powder shaping device and a granulation device for a dry powder making system for ceramic tiles. Background Technology

[0002] Dry powder production for ceramic tiles is a new technology proposed by the ceramic tile industry. It generally refers to grinding various raw materials (usually using a vertical mill) and then adding water to granulate them into powder with a specific particle size distribution, thus meeting the requirements for subsequent transportation, storage, homogenization, and molding. The most critical step in the dry powder production process is granulation. Common granulation devices include roller granulators (such as patents CN111993530A and CN205269568U), disc granulators (such as patents CN110327843A and CN202540433U), and tower granulators (such as patent CN109603679A). Among these, disc granulators produce powder with a finer particle size distribution and require a high water content, resulting in higher energy consumption for subsequent drying. While tower granulators produce powder with a coarser particle size distribution, their output is low, often requiring multiple tower granulators per production line, leading to high equipment costs and large floor space requirements. In comparison, roller granulators produce powder with a more moderate particle size distribution, require less water during the humidification granulation process, and consume less energy during the subsequent drying process. Therefore, it is currently the most widely used dry granulator.

[0003] The applicant's prior patent application CN205269568U describes a roller granulator with a general structure consisting of a roller-type humidifying mixing drum and a V-shaped mixing drum. The powder obtained after humidification and mixing first enters the V-shaped mixing drum. When the corner of the V-shaped mixing device is at the bottom, the coarser particles in the powder, being heavier, accumulate at the front end of the corner. Further, as the corner of the V-shaped mixing device rotates to the top, the heavier coarser particles are discharged forward from the granulator, while the lighter fine particles return to the humidifying mixing drum. The applicant found that, in using a traditional roller granulator, for some ceramic tile formulations primarily composed of weathered raw materials, the roller granulator can achieve the particle size distribution required for production even at a low moisture content (<10%). However, for some compound formulations (with low weathered material content), the roller granulator often needs to increase the moisture content. Some materials even struggle to produce powder with a suitable particle size distribution at high moisture contents. In addition, powder tends to stick to the corners of the V-shaped mixing drum of the roller mixer, making it difficult to clean. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a powder shaping device for a dry powder making system for ceramic bricks, which can improve the flowability of powder and optimize the particle size distribution of powder.

[0005] Another technical problem to be solved by the present invention is to provide a powder shaping device for a dry powder making system for ceramic bricks.

[0006] To address the aforementioned technical problems, this invention provides a powder shaping device for a dry powder production system for ceramic bricks, used to process the initial powder obtained by humidifying ceramic brick micro powder; comprising: a feeding mechanism, a roller, a discharging mechanism, and a roller driving device, wherein the feeding mechanism is connected to the feeding end of the roller, and the discharging mechanism is connected to the discharging end of the roller; the inner wall of the roller is provided with one or more protrusions in the circumferential direction of the roller;

[0007] Driven by the rotation of the roller, the initial powder is conveyed from the feed end of the roller to the discharge end, and rolls over the protrusion under the obstruction of the protrusion, so that the particles in the initial powder adhere and mix with each other, the particle size increases, and tends to be spherical.

[0008] As an improvement to the above technical solution, the inner wall of the roller is provided with multiple annular protrusions, and a connecting part is provided between adjacent protrusions; the roller is inclined, and the inclination angle is 1~20°.

[0009] As an improvement to the above technical solution, the inner wall of the roller is provided with spirally distributed protrusions, and the roller is arranged horizontally.

[0010] As an improvement to the above technical solution, the cross-section of the protrusion is arc-shaped, triangular, trapezoidal, rectangular, or sawtooth-shaped.

[0011] As an improvement to the above technical solution, the roller includes a main body and a plurality of transmission rings disposed outside the main body, the plurality of transmission rings being connected by reinforcing ribs; one or more transmission rings are connected to the roller drive device.

[0012] The main body of the cylinder is provided with multiple annular protrusions, and there are arc-shaped grooves connecting the adjacent protrusions. The protrusions and connecting parts are connected to form the circumferential cylindrical wall of the main body of the cylinder.

[0013] As an improvement to the above technical solution, the protrusions are evenly distributed on the main body of the cylinder; the ratio of the distance between adjacent protrusions to the bottom width of the protrusion is (1.8~4):1; the ratio of the height of the protrusion to the depth of the arc-shaped groove is 1:(0.8~1).

[0014] As an improvement to the above technical solution, the protrusion includes a first protrusion and a second protrusion; the first protrusion is disposed near the feed end of the roller, and the second protrusion is disposed near the discharge end of the roller.

[0015] The ratio of the distance between adjacent first protrusions to the distance between adjacent second protrusions is 1:(1.5~3); the ratio of the height of the first protrusion to the height of the second protrusion is 1:(1.2~2); and the ratio of the depth of the first connecting portion to the depth of the second connecting portion is 1:(1.5~3).

[0016] As an improvement to the above technical solution, a scraping device is also included, which includes a scraping plate, a support shaft and a scraping drive device;

[0017] The scraper is located inside the roller and is fixedly connected to the support shaft. The support shaft passes through the roller wall at the feed end and / or discharge end and is connected to the scraper drive device.

[0018] Accordingly, the present invention also discloses a granulation device for a dry powder production system for ceramic bricks, including a humidifying and stirring device and the aforementioned powder shaping device; the humidifying and stirring device is a roller-type humidifying granulator and / or a disc granulator.

[0019] As an improvement to the above technical solution, the humidifying and stirring device includes:

[0020] Stirring drum;

[0021] A feeding mechanism, which is connected to the mixing drum, is used to add micro powder to the mixing drum;

[0022] A spray mixing mechanism is used to add water into the mixing drum and mix the powder and water.

[0023] A discharge mechanism, connected to the mixing drum, is used to discharge the initial powder material discharged from the mixing drum; and

[0024] A stirring drum drive mechanism is used to drive the stirring drum to rotate.

[0025] Implementing this invention has the following beneficial effects:

[0026] 1. The powder shaping device of the present invention includes a feeding mechanism, a roller, a discharging mechanism, and a roller driving device. The feeding mechanism is connected to the feeding end of the roller, and the discharging mechanism is connected to the discharging end of the roller. The inner wall of the roller is provided with one or more protrusions along the circumferential direction of the roller. After the initial powder enters the roller, it moves towards the discharging end under the action of the roller rotation. When it encounters the protrusions, the particles in the initial powder roll over the protrusions due to the obstruction of the protrusions, thereby causing the particles to adhere and mix with each other, increasing the particle size of the initial powder and making it more spherical, thus improving the particle size distribution and flowability of the finished powder.

[0027] 2. The powder shaping device of the present invention has a scraper inside the roller, which makes the roller easy to clean.

[0028] 3. The granulation device in the present invention includes a humidifying and stirring device and a powder shaping device. The humidifying and stirring device can adopt a disk granulator or a roll granulator. When using a roll granulator, the V-shaped stirring cylinder at the rear end can be not provided, which simplifies the structure of the granulator, improves its operating stability, and effectively solves the problem of difficult cleaning at the corners of the V-shaped stirring cylinder. Brief Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the powder shaping device in an embodiment of the present invention;

[0030] Figure 2 is a schematic cross-sectional structural diagram of the powder shaping device in Embodiment 1 of the present invention;

[0031] Figure 3 is Figure 2 a partial enlarged view of A in;

[0032] Figure 4 is a schematic cross-sectional structural diagram of the powder shaping device in Embodiment 2 of the present invention;

[0033] Figure 5 is Figure 4 a partial enlarged view of B in;

[0034] Figure 6 is Figure 4 a partial enlarged view of C in;

[0035] Figure 7 is a schematic structural diagram of the granulation device in Embodiment 3 of the present invention. Detailed Embodiments

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. It is hereby declared that the orientation terms such as upper, lower, left, right, front, rear, inner, and outer that appear or will appear in the present invention are only based on the drawings of the present invention, and they do not specifically limit the present invention.

[0037] Embodiment 1 Powder Shaping Device

[0038] Refer Figure 1 、 Figure 2This embodiment provides a powder shaping device, including a feeding mechanism 1, a roller 2, a discharging mechanism 3, and a roller driving device 4. The feeding mechanism 1 is connected to the feeding end of the roller 2, and the discharging mechanism is connected to the discharging end of the roller 2. Multiple protrusions 21 are provided on the inner wall of the roller 2 along its circumference. In the dry powdering system, the dry micro-powder (moisture content <1%) obtained by the vertical mill is humidified by a stirring and humidifying device to obtain preliminary powder (moisture content 8~12%). The preliminary powder enters the feeding end of the roller 2 via the feeding mechanism 1, and is then conveyed to the discharging end of the roller 2 under the drive of the roller 2's rotation, and finally discharged by the discharging mechanism. When the initial powder is conveyed to the position of the protrusion 21, the particles in the initial powder are obstructed by the protrusion 21 and crawl over the protrusion 21 in a rotating manner. During the process of crawling over the protrusion 21, they mix and adhere with other particles in the initial powder, which increases the particle size of the initial powder and makes the particles tend to be spherical, thus achieving the purpose of shaping.

[0039] It should be noted that, due to the inherent properties of the ceramic powder and the performance of the humidifying and mixing device, the initial powder still contains a considerable number of fine particles. These fine particles are relatively light, and when they enter the roller 2 through the feeding mechanism 1, the lighter fine particles are more concentrated near the discharge end of the roller 2, while the heavier coarser particles are more concentrated near the feed end. Therefore, as the roller 2 rotates, the coarser particles at the feed end move forward (to the discharge end), adhering to the fine particles, further increasing the particle size of the coarse particles and gradually making them more spherical, thus enhancing the flowability of the finished powder.

[0040] Among them, reference Figure 2 The feeding mechanism 1 is specifically a feeding hopper, which is rotatably connected to the roller 2. To further optimize the distribution of coarse and fine particles when the initial powder enters the roller 2, the distance d between the bottom surface of the feeding mechanism 1 and the bottom surface of the roller 2 should be controlled to be ≥ 1 / 4 of the roller diameter D, and the angle α between the side of the feeding hopper away from the roller 2 and the central axis of the roller 2 should be ≥ 60°. Preferably, in this embodiment, the distance d between the bottom surface of the feeding mechanism 1 and the bottom surface of the roller 2 is 1 / 3 of the roller diameter D; and the angle α between the side of the feeding hopper away from the roller 2 and the central axis of the roller 2 is 70°.

[0041] The roller 2 can be a single integral cylinder with protrusions 21 on its inner wall. The roller 2 can also be a composite layer structure, but is not limited thereto. Preferably, in one embodiment of the invention, the roller 2 includes a main body 22 and multiple transmission rings 23 disposed outside the main body 22, wherein one or more transmission rings 23 are connected to the roller drive device 4, and the multiple transmission rings 23 are connected by reinforcing ribs 24. Based on the structure of this embodiment, the operation of the roller 2 can be stabilized, the overall weight of the roller 2 can be reduced, materials can be saved, and manufacturing can be facilitated. More preferably, in this embodiment, the roller 2 includes a main body 22 and three transmission rings 23 fixedly connected to the outside of the main body 22, the three transmission rings 23 being evenly distributed on the main body 22. The transmission ring 23 located in the middle is connected to the roller drive device; the bottom of the transmission rings 23 located on both sides is provided with stabilizing bearings 25 to further improve the operational stability of the roller 2. Furthermore, based on the roller structure described above, the wall of the main body 22 can be entirely corrugated, meaning that the main body 22 directly uses the protrusions 21 and the connecting portions 26 between the protrusions 21 as the wall. Based on this structure, the thickness of the wall of the main body 22 can be significantly reduced (2~5mm), reducing the processing difficulty of the protrusions 21 inside the roller 2.

[0042] Specifically, in this embodiment, to accelerate the shaping speed, the roller 2 is inclined, meaning the feed end of the roller 2 is higher than the discharge end. Specifically, the inclination angle is 1~20°. When the inclination angle is >20°, the initial powder moves too quickly within the roller 2, even falling directly from the top of the protrusion to the discharge end, failing to achieve effective shaping. When the inclination angle is <1°, the initial powder moves too slowly within the roller 2, resulting in low output; and it easily causes initial powder accumulation, with an unreasonable distribution of coarse and fine particles, failing to effectively achieve rolling adhesion, i.e., failing to achieve the shaping effect.

[0043] It should be noted that in another embodiment of the present invention, the roller 2 may not be inclined. When this arrangement is adopted, in order to speed up the shaping process, the protrusions 21 can be arranged in a spiral pattern along the inner circumference of the roller 2 (similar to an internally threaded tube structure). However, when the protrusions 21 are of this shape, the height of the protrusions 21 should be controlled to be less than 40 mm to prevent the initial powder movement from becoming entirely forward conveying, making it impossible to roll over the protrusions 21 and weakening the shaping effect. Preferably, the height of the protrusions is controlled to be 20-35 mm. In addition, the pitch of the protrusions 21 is controlled to be 50-200 mm.

[0044] In another embodiment of the present invention, the roller 2 may not be inclined. When this arrangement is adopted, in order to speed up the shaping process, multiple elliptical protrusions 21 can be provided on the inner circumferential wall 27 of the roller 2, that is, the angle between the plane containing the elliptical protrusions 21 and the plane containing the central axis of the roller 2 is <90°. When the protrusions 21 are set in this shape, the height of the protrusions 21 should be controlled to be <30mm so that the initial powder can roll over the protrusions 21 to achieve the shaping purpose.

[0045] For details, please refer to Figure 3 In this embodiment, the main body 22 of the cylinder has multiple annular protrusions 21 (i.e., the annular protrusions 21 are perpendicular to the central axis of the roller 2), and the cross-section of the protrusions 21 is arc-shaped; a connecting portion 26 is provided between adjacent protrusions 21; wherein the connecting portion 26 is an arc-shaped groove. Through the protrusions 21 and connecting portions 26 of this shape, a corrugated appearance can be formed on the main body 22, optimizing the shaping effect. Specifically, the protrusions 21 are evenly distributed on the main body 22, the ratio of the distance δ1 between adjacent protrusions to the bottom width δ2 of the protrusion is (1.8~4):1, and the ratio of the height h1 of the protrusion 21 to the depth of the connecting portion 26 is 1:(0.8~1). Based on the above ratios, the rolling adhesion effect of the protrusions 21 can be further optimized, improving the particle size distribution and flowability of the finished powder.

[0046] Specifically, in this embodiment, the powder shaping device further includes a scraping device 5, which includes a scraper plate 51, a support shaft 52, and a scraping drive device (not shown in the figure). The scraper plate 51 is disposed inside the roller 2, more specifically inside the main body 22 of the roller. The scraper plate 51 is fixedly connected to the support shaft 52, which passes through the roller wall at the feed end and / or discharge end of the roller 2 and is connected to the scraping drive device. The cross-sectional shape of the scraper plate 51 is adapted to the shape of the inner wall of the roller 2. When scraping is required, the scraping drive device lifts the scraper plate 51 up through the support shaft 52, bringing it close to the inner wall of the roller 2 to achieve scraping.

[0047] The working principle of the powder shaping device based on the above embodiment is as follows: the preliminary powder obtained by moistening the ceramic brick micro powder enters the roller 2 through the feeding mechanism 1 and is conveyed to the discharge end of the roller 2 under the drive of the rotation of the roller 2; during the conveying process, when it encounters the protrusion 21, the particles in the preliminary powder roll over the protrusion 21 under the obstruction of the protrusion 21, thereby causing the particles in the preliminary powder to adhere and mix with each other, and obtain finished powder with large particles and high particle sphericity.

[0048] Example 2 Powder Shaping Device

[0049] The powder shaping device in this embodiment is based on Embodiment 1, and the similarities will not be repeated here. The difference between the powder shaping device in this embodiment and Embodiment 1 lies in the specific structure of the protrusion 21 and the connecting portion 26 within the roller 2. Specifically, refer to... Figures 4-6 In this embodiment, the protrusion 21 includes a first protrusion 211 and a second protrusion 212. The first protrusion 211 is disposed near the feed end of the cylinder body 22, and the second protrusion 212 is disposed near the discharge end of the cylinder body 22. The first protrusions 211 are connected by a first connecting portion 261, and the second protrusions 212 are connected by a second connecting portion 262. The total length of the first protrusion 211 and the first connecting portion 261 : the total length of the second protrusion 212 and the second connecting portion 262 is 1 : (2~4). The height of the first protrusion 211 is less than the height of the second protrusion 212, and the distance between adjacent first protrusions 211 is greater than the distance between adjacent second protrusions 212. Preferably, the ratio of the distance δ1 between adjacent first protrusions 211 to the distance δ2 between adjacent second protrusions 212 is 1:(1.5~3); the ratio of the height h1 of the first protrusion 211 to the height h3 of the second protrusion 212 is 1:(1.2~2); and the ratio of the depth h2 of the first connecting portion 261 to the depth h4 of the second connecting portion 262 is 1:(1.5~3). Based on the above structure, there are more coarse particles on the first protrusions 211 and the first connecting portion 261 near the feed end, and their rolling forward speed is fast with less adhesion; while on the second protrusion 212 near the discharge end, the flow of coarse particles is slower, and more fine particles distributed near the discharge end adhere, further optimizing the shaping effect.

[0050] Example 3 Granulation apparatus

[0051] This embodiment provides a granulation device for a dry powder production system for ceramic bricks, referencing... Figure 7 The device includes the powder shaping device 100 and the stirring and humidifying device 200 of Embodiment 1. The stirring and humidifying device 200 includes a stirring drum 210, a feeding mechanism 220, a spray stirring mechanism 230, a discharge mechanism 240, and a stirring drum drive mechanism 250. The feeding mechanism 220 includes a screw conveyor 221, a first motor 222, and a feed inlet 223, which communicates with the stirring drum 210. The spray stirring mechanism 230 includes a stirring shaft 231, multiple spray stirring paddles 232 connected to the stirring shaft 231, a second motor 233, and a water supply device (not shown in the figure). The multiple spray stirring paddles 232 are disposed inside the stirring drum 210, the second motor 233 is disposed outside the stirring drum 210 and drives the spray stirring paddles 232 to rotate via the stirring shaft 231, and the water supply device supplies water to the spray stirring paddles 232 via the stirring shaft 231.

[0052] Based on the above-described granulation device, a V-shaped mixing cylinder is not required on the stirring and humidifying device 200, avoiding the problem of difficult-to-clean accumulated material. Furthermore, the powder shaping device 100 effectively improves the particle size distribution and flowability of the finished powder. This also broadens the application of dry powdering technology in materials with different physical properties.

[0053] Example 4 Granulation apparatus

[0054] This embodiment provides a granulation device for a dry powder production system for ceramic bricks, comprising the powder shaping device 100 and the stirring and humidifying device 200 of Embodiment 2. The stirring and humidifying device 200 includes a stirring drum 210, a feeding mechanism 220, a spray stirring mechanism 230, a discharge mechanism 240, and a stirring drum drive mechanism 250. The feeding mechanism 220 includes a screw conveyor 221, a first motor 222, and a feed inlet 223, which communicates with the stirring drum 210. The spray stirring mechanism 230 includes a stirring shaft 231, multiple spray stirring paddles 232 connected to the stirring shaft 231, a second motor 233, and a water supply device (not shown in the figures). The multiple spray stirring paddles 232 are disposed inside the stirring drum 210, the second motor 233 is disposed outside the stirring drum 210 and drives the spray stirring paddles 232 to rotate via the stirring shaft 231, and the water supply device supplies water to the spray stirring paddles 232 via the stirring shaft 231.

[0055] Based on the above-described granulation device, a V-shaped mixing cylinder is not required on the stirring and humidifying device 200, avoiding the problem of difficult-to-clean accumulated material. Furthermore, the powder shaping device 100 effectively improves the particle size distribution and flowability of the finished powder. This also broadens the application of dry powdering technology in materials with different physical properties.

[0056] Test case

[0057] Experiments were conducted using the raw material formulas of ceramic medium plates from a certain factory. Formula 1 was mainly prepared using weathered materials, while Formula 2 was mainly prepared using compound materials. Specifically, without the presence of additives (body strengthening agents, deflocculants, etc.), the powder was prepared using a traditional wet powder preparation process. After pressing and testing, the green strength of Formula 1 was 0.9 MPa, and the green strength of Formula 2 was 0.7 MPa.

[0058] The raw materials of the two formulations above were ground using a vertical mill until the residue on a 250-mesh sieve was 2 wt% and the moisture content was 0.8 wt%, yielding micro-powder. The micro-powder was granulated using the granulation devices of Examples 3 and 4 to obtain semi-finished powder; then, it was dried in a fluidized bed using the method described in the comparative document (CN205269568U) to obtain the finished powder. Alternatively, a conventional wet granulation system was used, employing the GRC granulator from the comparative document, followed by fluidized bed drying (CN205269568U). The granulated powder was subjected to the following tests:

[0059] (1) Particle size distribution: Particle size distribution was determined by vibrating screen (see "Ceramic Tile Production Technology", edited by Zhu Yongping, Tianjin University Press, 1st edition, 2009, page 188).

[0060] (2) Flowability, the specific measurement method is as follows: place a glass cylinder with a diameter of 30 mm and a height of 50 mm on a glass plate, fill it with ceramic plate powder and level it, then lift the glass cylinder, and record the maximum height H of the material pile after the ceramic plate powder naturally flows out. s Then liquidity f =50-H s .

[0061] The specific results are shown in the table below:

[0062]

[0063] As can be seen from the table, after using the granulation device in the embodiments of this application, the particle size distribution and flowability of the granulated powder are greatly improved.

[0064] The above description is a preferred embodiment of the invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the invention, and these improvements and modifications are also considered to be within the scope of protection of the invention.

Claims

1. A powder shaping device for a ceramic tile dry method powder production system for processing a primary powder obtained by humidifying a ceramic tile micro-powder; characterized in that, include: The system includes a feeding mechanism, a roller, a discharging mechanism, and a roller drive device. The feeding mechanism is connected to the feeding end of the roller, and the discharging mechanism is connected to the discharging end of the roller. The inner wall of the roller has multiple protrusions in the circumferential direction, and a connecting part is provided between adjacent protrusions. The roller uses the protrusions and the connecting parts as its wall. The height of the protrusions is 20~35mm. The initial powder is conveyed from the feed end to the discharge end of the roller under the drive of the roller rotation, and rolls over the protrusion under the obstruction of the protrusion.

2. The powder shaper for a ceramic tile dry process powder production system according to claim 1, characterized in that, The inner wall of the roller is provided with multiple annular protrusions; the roller is inclined, with an inclination angle of 1~20°.

3. The powder shaper for a ceramic tile dry milling system according to claim 1, wherein, The inner wall of the roller is provided with spirally distributed protrusions, and the roller is arranged horizontally.

4. The powder shaper for a ceramic tile dry process powder production system according to any one of claims 1 to 3, characterized in that, The cross-section of the protrusion is arc-shaped, triangular, trapezoidal, rectangular, or sawtooth-shaped.

5. The powder shaper for a ceramic tile dry milling system according to claim 1, wherein, The roller includes a main body and a plurality of transmission rings disposed outside the main body, the plurality of transmission rings being connected by reinforcing ribs; one or more transmission rings are connected to the roller drive device; The main body of the cylinder is provided with multiple annular protrusions, and there are arc-shaped grooves connecting the adjacent protrusions. The protrusions and connecting parts are connected to form the circumferential cylindrical wall of the main body of the cylinder.

6. The powder shaper for a ceramic tile dry milling system according to claim 5, wherein, The protrusions are evenly distributed on the main body of the cylinder; the ratio of the distance between adjacent protrusions to the bottom width of the protrusion is (1.8~4):1; the ratio of the height of the protrusion to the depth of the arc-shaped groove is 1:(0.8~1).

7. The powder shaper for a ceramic tile dry milling system according to claim 2, wherein The protrusion includes a first protrusion and a second protrusion; the first protrusion is disposed near the feed end of the roller, and the second protrusion is disposed near the discharge end of the roller. The ratio of the distance between adjacent first protrusions to the distance between adjacent second protrusions is 1:(1.5~3); the ratio of the height of the first protrusion to the height of the second protrusion is 1:(1.2~2); and the ratio of the depth of the first connecting portion to the depth of the second connecting portion is 1:(1.5~3).

8. The powder shaper for a ceramic tile dry milling system according to claim 1, wherein, It also includes a scraping device, which includes a scraper plate, a support shaft and a scraping drive device; The scraper is located inside the roller and is fixedly connected to the support shaft. The support shaft passes through the roller wall at the feed end and / or discharge end and is connected to the scraper drive device.

9. A granulation device for a dry powder production system for ceramic bricks, comprising a humidifying and stirring device and a powder shaping device as described in any one of claims 1 to 8; wherein the humidifying and stirring device is a roller-type humidifying granulator and / or a disc granulator.

10. The granulating apparatus for a ceramic tile dry process powdering system according to claim 9, wherein The humidifying and stirring device includes: Stirring drum; A feeding mechanism, which is connected to the mixing drum, is used to add micro powder to the mixing drum; A spray mixing mechanism is used to add water into the mixing drum and mix the powder and water. A discharge mechanism, connected to the mixing drum, is used to discharge the initial powder material discharged from the mixing drum; and A stirring drum drive mechanism is used to drive the stirring drum to rotate.

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