A method for preparing ceramic tile base powder

Abstract

The invention discloses a method for preparing ceramic tile base blank powder, S310, premixing a plurality of color powders; S320, a mixing channel is provided in a mixing barrel, one end opening of the mixing channel is used as a feeding port, the mixing channel is inclined downward in a direction away from the feeding port, a plurality of overflow through holes are provided on the outer peripheral wall of the mixing barrel, the mixing barrel is rotated, and the premixed plurality of color powders are conveyed from the feeding port into the mixing channel, the color powders are continuously collided and mixed with the rotation of the mixing barrel, and fall downward through the overflow through holes for collection, the base blank powders after discharge are in a randomly mixed state, and after subsequent pressing and molding by a press, a brick base blank with a whole body effect is formed, the mixing effect is good, the color and texture are similar to the surface, the texture is improved, the aesthetics and the use effect are improved, and the operation difficulty and the production control difficulty are greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of methods for preparing ceramic tile base blank powder, and in particular to a method for preparing ceramic tile base blank powder. Background Art

[0002] The powder material of the brick base with a full-body effect is mostly produced by spreading the powder on a material cart, and the spreading of the material cart is achieved by spreading different color powders on the grid in batches, so that after pressing the grid, a brick base with a certain texture is formed. When using this method of spreading, certain requirements are required on the conveying position and speed of the color powder, which is difficult to operate and control in production. In addition, the structure of the material cart is complicated, which increases the production cost. Summary of the invention

[0003] The object of the present invention is to provide a method for preparing ceramic tile base powder to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problem is:

[0005] A method for preparing ceramic tile base powder, comprising the following steps: S310, premixing a plurality of color powders; S320, a mixing tube is provided with a mixing channel, one end of the mixing channel is opened as a feed port, the mixing channel is inclined downward in a direction away from the feed port, a plurality of overflow holes are provided on the outer peripheral wall of the mixing tube, the mixing tube is rotated, and the premixed plurality of color powders are conveyed from the feed port into the mixing channel, the color powders continuously collide and mix with the rotation of the mixing tube, and fall downward through the overflow holes for collection.

[0006] The technical solution has at least the following beneficial effects: a plurality of color powders include base material and different color powder materials, and the plurality of color powders are transported to the feed port of the mixing barrel through an external conveying device, and the mixing channel is tilted downward at one end away from the feed port, so that the color powder continuously entering the feed port can continue to move along the mixing channel, reducing powder blockage, and because the driving device drives the mixing barrel to rotate continuously, the rotation axis of the mixing barrel and its central axis are parallel or coincident with each other, and the plurality of color powders are continuously collided and stacked with the rotation of the mixing barrel, and the mixed base powder materials are discharged downward from the overflow through hole under the action of their gravity and collected, and the base powder materials after discharge are in a randomly mixed state, and the base powder materials in this state are subsequently pressed and formed by a press to form a brick base blank with a full-body effect, and the mixing effect is good, so that the brick base blank can be similar to its surface color and texture after forming, ensuring that the bottom see-through phenomenon will not occur during the processes of brick cutting and drilling, thereby improving the aesthetics and use effect.

[0007] As a further improvement of the above technical solution, in S320, the mixing barrel includes a closed section and a connecting section arranged along the length extension direction thereof, wherein: in the closed section, the mixing channel is isolated from the outside of the mixing barrel; in the connecting section, the overflow through hole is located in the connecting section. The mixing barrel body is divided into a connecting section and a closed section. After the color powder enters the closed section, it moves and mixes along the mixing barrel to prevent the color powder from falling from the mixing barrel, thereby preventing the color powder from falling too quickly, increasing the number of collisions and mixing time of the color powder in the mixing barrel, and after the mixed base material enters the connecting section, it can be discharged along the overflow through hole. After various color powders pass through the closed section, the color powder in the base powder is more evenly distributed, thereby achieving a better whole body effect.

[0008] As a further improvement of the above technical solution, the inner peripheral wall of the mixing barrel in the closed section is provided with a material transfer hole. When the color powder is in the closed section, as the mixing barrel rotates, the material transfer hole on the inner wall of the mixing barrel provides a certain friction force for the powder and drives the color powder to move. This prevents the color powder from falling, increases the number of collisions and mixing time after the color powder enters the closed section, and as the mixing barrel rotates, the material transfer hole on the inner wall of the mixing barrel provides a certain friction force for the color powder, so that the color powder close to the inner wall of the mixing barrel can fall after the mixing barrel rotates to a higher position, and overlap and collide with the color powder at the bottom, thereby improving the mixing effect.

[0009] As another improvement of the above technical solution, a material distribution port is provided at the other end of the mixing channel away from the feed port, and color powder blocks or impurities larger than the aperture of the overflow through hole can be dropped and collected from the material distribution port. Powder materials that meet the size of the overflow through hole continuously fall out of the overflow through hole along the mixing channel as the mixing barrel rotates, and then enter the molding stage, while some large-particle impurities or agglomerated powder materials continuously move along the mixing channel, and finally separate from the mixing barrel and fall out of the material distribution port, realizing the removal of large-particle materials. The mixing barrel can not only realize the mixing effect, but also realize the screening and separation effect of large-particle materials, thereby improving the quality of the base powder and thus improving the quality of the formed brick base, with a simple and reliable structure and diverse functions.

[0010] As another improvement of the above technical solution, S310 includes the following steps: S311, multiple color powders are respectively conveyed to the second conveyor belt through multiple first conveyor belts, so that the multiple color powders are superimposed on the second conveyor belt, and the second conveyor belt continuously conveys toward the direction of the feed port; S312, multiple powders are conveyed to the feed port after passing through the blocking structure on the second conveyor belt, wherein multiple discharge gaps are arranged in the blocking structure along a horizontal direction perpendicular to the powder conveying direction, and multiple powders are pre-mixed through the discharge gaps. Multiple color materials are first superimposed on the second conveyor belt, so that different color powder materials can be stacked into the base material to achieve the first step of mixing, and then, the multiple color materials move relative to the blocking structure with the movement of the second conveyor belt, change the movement trajectory of the color powder, and are squeezed out from the discharge gap to achieve preliminary mixing.

[0011] As another improvement of the above technical solution, before performing S310, the following steps are also included: S301, preparing slurry, wherein the main control point standard of the slurry performance is: specific gravity is 1.69±0.03g / cm 3 , flow rate is 30-80S, moisture is 32-37%, fineness is controlled at 0.8%-1.0%, multiple colorants are added with water to form color paste and are mixed into different batches of slurries to form multiple slurries; S302, the multiple slurries formed in S301 are granulated to form multiple color powders, and the multiple color powders are sent to different powder silos for aging. In step S301, the ceramic raw material may be first prepared into a slurry by a wet ball mill, and water is added to the colorant to form a color paste and mixed into the slurry. Then, the prepared slurry is granulated to form various color powders and sent to different powder bins for aging, thereby completing the preparation of the color powder and conveniently forming the slurry to form color powder, thereby providing a basis for subsequent color powder mixing, base blank pressing and other processing steps. In fact, when the color powder needs to be mixed, the powder bin continuously outputs the color powder to its corresponding first conveyor belt, and then transports it to the second conveyor belt, so that different color powder materials can be stacked in the base blank material, and the stacked multiple color powders are transferred through the second conveyor belt to facilitate subsequent mixing.

[0012] As another improvement of the above technical solution, the moisture content of the powder prepared in S302 is 6.7-7.2%, the particle size distribution is ≤0.5% for particles above 20 mesh, 50-60% for particles above 40 mesh, ≤3% for particles below 100 mesh, the vibration time of the sieve is 2 minutes, and the bulk density is ≥0.87. This ensures that the toner meets the powder molding standard, providing a basis for subsequent processing steps such as toner mixing and base pressing.

[0013] As another improvement of the above technical solution, the plurality of overflow through holes are in accordance with an 8-mesh screen, thereby improving the mixing effect of the toner.

[0014] As another improvement of the above technical solution, the rotation axis of the mixing barrel coincides with the central axis of the mixing channel, and the rotation frequency of the mixing barrel is 15 to 35 Hz. The rotation speed of the mixing barrel is adjusted to adapt to powders of different particle sizes, ensuring that most of the powders will not fall directly along the overflow through hole 142 and will not be scattered with the rotation of the mixing barrel 130.

[0015] As another improvement of the above technical solution, a plurality of color powders are set in different proportions according to the desired spot effect, and the plurality of color powders are mixed and collected by the mixing drum to form a base blank powder, and then the base blank powder is pressed to form a brick base blank with a full-body spot effect. It is ensured that the pressed brick base blank forms a spot effect, so that after the surface of the brick base blank is colored, the brick base blank body can be similar in color and texture to its surface, ensuring that the bottom will not be visible during the process of cutting and drilling the brick body, thereby improving the aesthetics and use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0017] Figure 1 A device for preparing ceramic tile base powder provided by one embodiment of the present invention;

[0018] Figure 2 It is a structural diagram of a powder bin, a first conveyor belt, a second conveyor belt and a material blocking structure provided by an embodiment of the present invention.

[0019] In the attached drawings: 120-collecting trough, 121-discharging port, 122-distributing port, 130-mixing barrel, 131-connecting section, 132-closed section, 140-mixing channel, 141-feeding port, 142-overflow hole, 210-first conveyor belt, 220-second conveyor belt, 230-material blocking structure, 231-discharging gap, 240-powder bin. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the present invention can be combined interchangeably without conflicting with each other.

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0024] Reference Figure 1The preparation method of ceramic tile base powder includes the following steps: S310, premixing a plurality of color powders; S320, a mixing channel 140 is provided in a mixing barrel 130, an opening at one end of the mixing channel 140 is used as a feed port 141, the mixing channel 140 is inclined downward in a direction away from the feed port 141, a plurality of overflow holes 142 are provided on the outer peripheral wall of the mixing barrel 130, the mixing barrel 130 is rotated, and the premixed plurality of color powders are transported from the feed port 141 into the mixing channel 140, the color powders are continuously collided and mixed with the rotation of the mixing barrel 130, and fall downward through the overflow holes 142 for collection. Specifically, a collecting trough 120 with an upward opening is provided at the bottom of the mixing barrel 130, and a discharge port 121 is provided at the bottom of the collecting trough 120. The end of the mixing channel 140 away from the feeding port 141 is inclined downward, so that the powder continuously entering the feeding port 141 can continue to move along the mixing channel 140 driven by the gravity component force, thereby reducing the blockage of the powder. Because the driving device rotates to drive the mixing barrel 130 to operate continuously, the powder continuously collides and stacks with the rotation of the mixing barrel 130. Under the action of its gravity, the powder of the blank bottom mixed with the color powder flows out of the discharge port 121 from the bottom of the mixing barrel 130 along the overflow through hole 142 and the collecting trough 120 in turn. After discharging, the color powder is randomly mixed in the powder of the blank bottom. After the powder of the blank bottom in this state is pressed and formed by a subsequent press, it is formed into a brick bottom blank with a full-body effect, and the mixing effect is good. At the same time, because the use of a material cart to distribute the material will make the texture of each brick base produced almost the same, reducing the real effect, while in the present invention, the powder also rotates with the mixing barrel 130 in the process of moving away from the discharge port 121, and the powder falling from the overflow through hole 142 has a certain sense of lines, which improves the texture, aesthetics and use effect. In this embodiment, the rotation axis and central axis of the mixing barrel 130 coincide with the rotation axis and central axis of the mixing channel 140, which is convenient for installation. In fact, the driving device rotates and drives the mixing barrel 130, and the rotation axis of the mixing barrel 130 can be parallel to the central axis, which improves the random mixing effect. Moreover, it should be noted that, in the process of the colorants descending along the mixing channel 140, there is a mutual collision movement. Then, after the colorants contact the inner wall of the rotating mixing barrel 130, driven by the overflow through hole 142 on the inner wall of the mixing barrel 130, various colorants undergo random collision movement, so that the colorants falling out of the discharge port 121 will be in a randomly mixed state, thereby improving the mixing effect. Moreover, compared with the method of using a material cart to spread the materials, the difficulty of operation and production control is greatly reduced, the mixing quality is improved, and the production cost is reduced.

[0025] In fact, the mixing channel 140 is inclined at an angle of 3° to 10° to the horizontal plane. As the mixing barrel 130 rotates, the toner is mixed with the mixing barrel 130 while continuously moving in the mixing channel 140 in a direction away from the feed port 141 and discharged from the plurality of overflow holes 142, thereby preventing the powder from constantly turning in the mixing channel 140 without falling, thereby reducing the clogging of the powder. Moreover, the inclined angle is 3° to 10°, which is relatively small, thereby increasing the number of times the powder is rotated and mixed, thereby improving the mixing effect. In this embodiment, the mixing channel 140 is inclined at an angle of 5° to the horizontal plane.

[0026] In addition, in some embodiments, the rotation axis of the mixing barrel 130 coincides with the central axis of the mixing channel 140, and the rotation frequency of the mixing barrel 130 is 15 to 35 Hz. The rotation speed of the mixing barrel 130 is adjusted to adapt to powders of different particle sizes to ensure that most of the color powder does not fall directly along the overflow hole 142 and does not float away with the rotation of the mixing barrel 130.

[0027] Moreover, in some embodiments, in S320, the mixing barrel 130 includes a closed section 132 and a connecting section 131 arranged along the length extension direction thereof, wherein: in the closed section 132, the mixing channel 140 is isolated from the outside of the mixing barrel 130; in the connecting section 131, the overflow through hole 142 is located in the connecting section 131. In fact, the connecting section 131 and the closed section 132 are cylindrical, and the connecting section 131 and the closed section 132 can be connected in sequence, or a closed section 132 is provided between the two connecting sections 131. In addition, the closed section 132 of the mixing barrel 130 may not be provided with an overflow through hole 142 to prevent the powder from falling out, and the mixing barrel 130 can be formed into a structure having the connecting section 131 and the closed section 132 at one time.

[0028] Furthermore, a material transfer hole is provided on the inner peripheral wall of the mixing barrel 130 in the closed section 132. When the toner is in the closed section 132, as the mixing barrel 130 rotates, the material transfer hole on the inner wall of the mixing barrel 130 provides a certain friction force for the powder and drives the toner to move. This prevents the toner from falling, increases the number of collisions and the mixing time after the toner enters the closed section 132, and as the powder rotates with the mixing barrel 130, the overflow through hole 142 on the inner wall of the mixing barrel 130 provides a certain friction force for the toner and drives the toner to rotate, thereby improving the mixing effect.

[0029] In order to achieve the screening and separation of large particles in the powder, in this embodiment, a material distribution port 122 is set at the other end of the mixing channel 140 away from the feed port 141, and the color powder blocks or impurities larger than the aperture of the overflow through hole 142 can fall and be collected from the material distribution port 122. To achieve the removal of large particles, the mixing barrel 130 can not only achieve the mixing effect, but also achieve the screening and separation of large particles, thereby improving the quality and strength of the brick base after molding. It should be noted that the opening at the other end of the mixing channel 140 away from the material distribution port 122 can actually be closed, and large particles will accumulate at the opening, and the staff needs to regularly clean the accumulated large particles.

[0030] In addition, in some embodiments, S310 includes the following steps: S311, multiple color powders are transported to the second conveyor belt 220 through multiple first conveyor belts 210 respectively, so that the multiple color powders are superimposed on the second conveyor belt 220, and the second conveyor belt 220 continuously transports toward the feed port 141; S312, multiple powders are transported to the feed port 141 after passing through the blocking structure 230 on the second conveyor belt 220, wherein multiple discharge gaps 231 are arranged in the blocking structure 230 along a horizontal direction perpendicular to the powder conveying direction, and multiple powders are pre-mixed through the discharge gaps 231. Specifically, different color powders can be stacked in the base material to achieve the first step of mixing, and then, the powder moves relative to the blocking structure 230 with the movement of the second conveyor belt 220, so as to achieve the effect of extruding the powder from the discharge gap 231, and achieve preliminary mixing. In fact, the second conveyor belt 220 can be a second conveyor belt 220 formed by a conveyor belt on a belt conveyor, which prevents the powder from falling, realizes preliminary mixing, and improves the powder mixing effect. Moreover, in this embodiment, the bracket is arranged at one end of the second conveyor belt 220 close to the feed port 141, and the bracket is provided with a mounting section spanning the second conveyor belt 220, and the mounting section is provided with a mixing rod, which is a material blocking structure 230, and a plurality of mixing rods are arranged at intervals along the extension direction of the mounting section, and the bottom ends of the mixing rods extend in the direction close to the second conveyor belt 220, and a discharge gap 231 is formed between two adjacent mixing rods. The second conveyor belt 220 is arranged on the frame, and the bracket is relatively fixed to the frame, and a rake-tooth shape is formed between the plurality of mixing rods. During the conveying process, the plurality of powders are first partially blocked by the plurality of mixing rods, and then flow out from the discharge gap 231 formed between two adjacent mixing rods, so as to realize pre-mixing, facilitate the movement of the powders, and improve the mixing effect. In practical applications, the mounting section is connected to the bracket by bolts, and the bolts are threadedly connected to the bracket, so that the height of the mounting section can be adjusted to suit different powder thicknesses. In addition, the mixing rod can be positioned and mounted on the mounting section by welding, threading, and clamping with a clamping plate threadedly connected to the mounting section.

[0031] In addition, refer to Figure 2 In this embodiment, before performing S310, the following steps are also included: S301, preparing slurry, wherein the main control point standard of the slurry performance is: specific gravity is 1.69±0.03g / cm 3 , flow rate is 30-80S, water content is 32-37%, fineness is controlled at 0.8%-1.0%, multiple colorants are added with water to form color paste and are mixed into different batches of slurries to form multiple slurries; S302, the multiple slurries formed in S301 are granulated to form multiple color powders, and the multiple color powders are sent to different powder bins 240 and aged. In step S301, the ceramic raw material may be first prepared into slurry by a wet ball mill, and the colorant is added with water to form a color paste and mixed into the slurry to facilitate adjustment of slurry parameters. Alternatively, the ceramic raw material and the colorant are mixed and directly prepared into slurry by a wet ball mill. In addition, in some embodiments, the main control point standard of the slurry performance is: specific gravity is 1.69±0.03g / cm 3 , flow rate is 30-80S, water content is 32-37%, and fineness is controlled at 0.8%-1.0%. The slurry formed conveniently is granulated to form toner, which provides a basis for subsequent toner mixing, base pressing and other processing steps. After the slurry parameter detection is qualified, step S302 is entered. In fact, when the toner needs to be mixed, the powder bin 240 continuously outputs the toner to its corresponding first conveyor belt 210, and then transports it to the second conveyor belt 220, so that different toner materials can be stacked in the base material. The stacked multiple toners are transferred through the second conveyor belt 220 and pre-mixed aggressively through the blocking structure 230, and then input into the mixing channel 140 for mixing. The structure is simple and the mixing effect is good.

[0032] Moreover, in step S302, the slurry can be made into powder by spray granulation in a spray tower to form powder that can be used for ceramic brick pressing, and in some embodiments, the moisture content of the powder made in step S2 is 6.7-7.2%, the particle grading is ≤0.5% above 20 mesh, 50-60% above 40 mesh, ≤3% below 100 mesh, the vibration time of the sieve is 2 minutes, and the bulk density is ≥0.87. Ensure that the color powder meets the powder molding standard, and provide a basis for subsequent color powder mixing, bottom blank pressing and other processing steps. In addition, the powder is sent to the press mold cavity and pressed to form a brick bottom blank; the brick bottom blank is glazed by the glazing equipment in the glaze line; the glazed brick bottom blank is subjected to inkjet printing or screen printing to make its surface have texture color; the printed brick bottom blank enters the firing kiln and is sintered at a high temperature of about 1150°C; the semi-finished product fired at high temperature can be packaged and stored after polishing and edging. In addition, the plurality of overflow through holes 142 conform to the 8-mesh screen. Improve the mixing effect of color powder.

[0033] In addition, in some embodiments, a plurality of color powders are set in different proportions according to the desired spot effect, and the plurality of color powders are mixed and collected by the mixing barrel 130 to form a base blank powder, and then the base blank powder is pressed to form a brick base blank with a full-body spot effect. It is ensured that the pressed brick base blank forms a spot effect, so that after the surface of the brick base blank is colored, the brick base blank body can be similar to the color and texture of its surface, ensuring that the bottom will not be transparent during the process of brick cutting and drilling, thereby improving the aesthetics and use effect. In addition, the color powder can include 50-60% of the base blank material, 10-20% of the dark black material and 25-35% of the gray material to ensure that the pressed brick base blank is mainly based on the color of the base blank material, and has uniform dark black and gray spots. In fact, in this embodiment, the proportion of the base blank material is 55%, the proportion of the dark black material is 15%, and the proportion of the gray material is 30%, so as to form a brick base blank product with full-body spots.

[0034] The preferred embodiments of the present invention are specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for preparing ceramic tile base powder, characterized in that: The following steps are involved: S310, premixing a plurality of toners; S310 includes the following steps: S311, the plurality of toners are respectively conveyed to the second conveyor belt (220) via the plurality of first conveyor belts (210), so that the plurality of toners are superimposed on the second conveyor belt (220), and the second conveyor belt (220) continuously conveys toward the feed port (141); S312, the multiple powders pass through the material blocking structure (230) on the second conveyor belt (220) and are transported to the feed port (141), wherein a plurality of discharge gaps (231) are arranged in the material blocking structure (230) in a horizontal direction perpendicular to the powder conveying direction, and the multiple powders are pre-mixed after passing through the discharge gaps (231); S320, a mixing channel (140) is provided in the mixing barrel (130), one end opening of the mixing channel (140) is used as a feed port (141), the mixing channel (140) is inclined downward in a direction away from the feed port (141), a plurality of overflow through holes (142) are provided on the outer peripheral wall of the mixing barrel (130), the mixing barrel (130) is rotated, and a plurality of pre-mixed color powders are conveyed from the feed port (141) into the mixing channel (140), the color powders continuously collide and mix with the rotation of the mixing barrel (130), and fall downward through the overflow through holes (142) to be collected; The rotation speed of the mixing drum (130) is adjusted to adapt to powders of different particle sizes, ensuring that most of the toner does not fall directly along the overflow through hole (142) and does not float away with the rotation of the mixing drum (130); The mixing cylinder (130) mixes and collects the various color powders to form a base powder, and then presses the base powder; Wherein, in S320, the mixing barrel (130) comprises a closed section (132) and a connecting section (131) arranged along a length extension direction thereof, wherein: In the closed section (132), the mixing channel (140) and the exterior of the mixing barrel (130) are isolated from each other; In the connecting section (131), the overflow through hole (142) is located in the connecting section (131); The mixing barrel (130) is provided with a material transfer hole on its inner peripheral wall in the closed section (132); when the toner is in the closed section (132), as the mixing barrel (130) rotates, the material transfer hole on the inner wall of the mixing barrel (130) provides a certain friction force for the powder and drives the toner to move.

2. The method for preparing a ceramic tile base powder according to claim 1, characterized in that: A material distribution opening (122) is provided at the other end of the mixing channel (140) away from the material feed opening (141), and toner blocks or impurities larger than the aperture of the overflow through hole (142) can fall from the material distribution opening (122) and be collected.

3. The method for preparing a ceramic tile base powder according to claim 1, characterized in that: Before performing S310, the following steps are also included: S301, preparing slurry, wherein the main control point standards of the slurry performance are: specific gravity of 1.69±0.03 g / cm³, flow rate of 30-80S, water content of 32-37%, fineness controlled at 0.8%-1.0%, multiple colorants are added with water to form color paste and are respectively mixed into different batches of slurry to form multiple slurries; S302, the various slurries formed in S301 are granulated to form various toners, and the various toners are respectively sent to different powder bins (240) for aging.

4. The method for preparing a ceramic tile base powder according to claim 3, characterized in that: In S302, the moisture content of the powder is 6.7-7.2%, the particle size distribution is ≤0.5% for particles above 20 mesh, 50-60% for particles above 40 mesh, and ≤3% for particles below 100 mesh. The sieve vibration time is 2 minutes, and the bulk density is ≥0.

87.

5. The method for preparing a ceramic tile base powder according to claim 1, characterized in that: The plurality of overflow through holes (142) are adapted to fit a 6-10 mesh sieve.

6. The method for preparing a ceramic tile base powder according to claim 1, characterized in that: The rotation axis of the mixing barrel (130) coincides with the central axis of the mixing channel (140), and the rotation frequency of the mixing barrel (130) is 15-35 Hz.

7. The method for preparing a ceramic tile base powder according to claim 1, characterized in that: The various color powders are arranged in different proportions according to the desired spot effect, and the various color powders are mixed and collected by the mixing barrel (130) to form a base blank powder material, and then the base blank powder material is pressed to form a brick base blank with a spot effect throughout the body.

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