CN107935386B

CN107935386B - Granular dry particle glaze, granular dry particle glaze cloth stone-like brick and preparation method thereof

Info

Publication number: CN107935386B
Application number: CN201711130827.4A
Authority: CN
Inventors: 潘利敏; 赵勇; 杨元东; 刘洁芳; 黄玲艳
Original assignee: Monalisa Group Co Ltd
Current assignee: Monalisa Group Co Ltd
Priority date: 2017-11-15
Filing date: 2017-11-15
Publication date: 2021-06-11
Anticipated expiration: 2037-11-15
Also published as: CN107935386A

Abstract

The invention relates to granular dry granular glaze, a granular dry granular glaze cloth stone-like brick and a preparation method thereof. The preparation method of the granular dry grain glaze comprises the following steps: extruding the glaze powder into a blank cake; and crushing the blank cake to obtain granular dry granular glaze. The granular dry grain glaze can be obtained by a simple process, can be used for preparing ceramic tiles, and can obtain stone-like products with vivid patterns, rich layers, natural textures, strong stereoscopic impression and granular feeling.

Description

Granular dry particle glaze, granular dry particle glaze cloth stone-like brick and preparation method thereof

Technical Field

The invention relates to granular dry granular glaze, a granular dry granular glaze cloth stone-like brick and a preparation method thereof, belonging to the technical field of production and manufacturing of ceramic bricks.

Background

The ceramic glaze is an indispensable raw material for ceramic manufacture, and has a very important influence on the performance and quality of the ceramic product. The existing ceramic frits can be roughly classified into the following according to categories and uses: lead glaze and lead-free glaze; raw glaze and fritted glaze; glaze for primary firing or secondary firing; glaze for ceramic tiles, tableware, sanitary ceramics and electroceramics; high-temperature glaze and low-temperature glaze; high expansion glaze and low expansion glaze; colored glaze and colorless glaze; transparent glaze and opaque glaze; glossy glaze, matte glaze, semi-matte glaze or patterned glaze and functional glaze: such as fluorescent glaze, metallic glaze, crystalline glaze, dry grain glaze, etc. The current dry grain glaze is a hot new product in industrial production and research, the product has rich patterns and rich levels, has the effects of matte, wear resistance, skid resistance and pollution resistance, and is praised as a new era for creating ceramic tile production technology.

Reference 1 (application No. 201610196097.7) discloses a method for producing a natural stone texture-imitated tile, comprising: adding a ceramic pigment into the ceramic blank to obtain color slurry, wherein the color slurry can also contain colored dry particles; the slurry is spread on the green brick to form a pattern layer, and then fired. The wet glaze making process has single decoration effect on ceramic tiles and is difficult to realize the effect of imitating natural stone.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a preparation method of granular dry granular glaze, a stone-like product with vivid patterns, rich layers, natural textures, strong stereoscopic impression and granular impression and a preparation method thereof.

One aspect of the present application provides a method for preparing a granular dry-grain glaze, which is characterized by comprising:

extruding the glaze powder into a blank cake;

and crushing the blank cake to obtain granular dry granular glaze.

According to the invention, the granular dry grain glaze can be obtained through a simple process, and can be used for preparing ceramic tiles, so that stone-like products with vivid patterns, rich layers, natural textures, strong stereoscopic impression and granular sensation can be obtained.

Preferably, the water content of the glaze powder is 6-10%.

Preferably, the grain composition of the glaze powder is 30 meshes: less than or equal to 16 percent, 30-60 meshes: more than or equal to 70 percent, 60-80 meshes: less than or equal to 11 percent, 80 meshes below: less than or equal to 6 percent.

Preferably, after crushing, the granular dry granular glaze is obtained on a sieve with 8-20 meshes or a sieve with 30-60 meshes.

The glaze powder can be a single color or can be multi-colored (i.e., have at least two colors).

Another aspect of the present application provides a method for preparing a granular dry-grain glaze cloth stone-like brick, comprising the following steps:

(1) preparing a granular dry grain glaze according to any one of the preparation methods;

(2) the granular dry grain glaze is distributed on the blank according to the existing pattern in layers;

(3) after distributing, pre-pressing into green bricks with certain strength for the first time;

(4) spraying and printing a design pattern on the green brick by using an ink jet machine;

(5) pressing the green brick again;

(6) and sintering the obtained green bricks.

According to the invention, the granular dry glaze and the powder dry glaze are distributed in layers in advance and are molded into a green brick, and then the dry grain distribution and the ink-jet printing are combined by combining the ink-jet printing technology, so that the stone-like effect with randomly changed patterns, vividness, rich layers, natural textures, strong stereoscopic impression and granular sensation can be obtained.

Preferably, the granular dry grain glaze and the powder dry grain glaze are distributed on the blank according to the existing pattern in layers. Preferably, the dry particle glaze of the powder is powder prepared from glaze materials with the same or different temperature formulas and colors.

Preferably, the grain composition of the powder dry grain glaze is as follows: 30-60 meshes: 30-37.5 wt%, 60-80 mesh: 42.5-50 wt%, 80-100 mesh: 12.5-17.5 wt%, 100 mesh: less than or equal to 5wt percent.

Preferably, in the step (2), the formula of the blank is as follows: by weight, SiO₂：60～67％、Al₂O₃：19～23％、Fe₂O₃：0.5～1.0％、TiO₂：0.15～0.30％、CaO：0.4～0.7％、MgO：0.3～0.8％、K₂O：2.5～3.5％、Na₂O: 2.7-3.5%, loss on ignition: 4.5 to 5.5 percent. In the blank formula, the content of alumina is properly increased, the high-temperature deformation resistance of the blank is enhanced, the expansion coefficient of the blank is reduced, the difference of the expansion coefficients of the blank and the glaze is reduced, the adaptability of the blank glaze is improved, and the control of the shape of bricks fired by a kiln is facilitated.

Preferably, in the step (1), the dry glaze powder particles are powder prepared from glaze materials with the same or different temperature formulas and colors.

Preferably, the cloth pattern in the step (2) and the inkjet pattern in the step (4) are coordinated with each other to form a natural stone effect. The granular dry grain glaze cloth has rough patterns and fine ink-jet patterns, the patterns are mutually related and have complementary artistry and are carefully matched, the natural fusion of the effects of the cloth patterns and the ink-jet patterns is ensured, the grain of the natural stone is like the grain of the natural stone, and the granular effect of the natural stone is perfectly reproduced.

Preferably, in the step (2), a multi-machine-position carving roller is adopted to positively beat the secondary material distribution method for material distribution. Therefore, multi-layer cloth can be better realized. The secondary material distribution of the multi-machine-position carving roller positive beating refers to that carving rollers with different patterns are arranged on a plurality of control devices, and various dry granular glazes are distributed with patterns on the surface of a blank body through the carving rollers.

Preferably, the grain composition of the billet is: 30 meshes: less than or equal to 16 percent, 30-60 meshes: more than or equal to 70 percent, 60-80 meshes: less than or equal to 11 percent, 80 meshes below: less than or equal to 6 percent.

Preferably, in the step (3), a roller is adopted for pre-pressing forming, and the roller is a plane.

Preferably, in the step (5), a mold is used for compression molding, and the mold is a mold with a concave-convex effect or a plane mold.

Preferably, a drying step is further included between the step (5) and the step (6), and the green brick is dried to have the moisture content of less than or equal to 0.5 wt%.

Preferably, between step (5) and step (6), further comprising: applying protective glaze on the green brick, or uniformly scattering fine frit dry particles on the decorative pattern, wherein the particle size of the fine frit dry particles is preferably as follows: 0.5 to 1.5 mm. Thereby, the natural flow effect of the surface can be enhanced.

Preferably, the firing temperature is 1180-1220 ℃, and the firing period is 60-70 minutes.

The application also provides the granular dry-grain glaze cloth stone-like brick prepared by any one of the preparation methods.

The granular dry grain glaze cloth stone-like brick can be a matte or highlight product and has the characteristics of vivid natural stone-like pattern, rich layers, natural texture, strong stereoscopic impression, strong granular sense and the like. The surface of the ceramic tile presents three-in-one three-dimensional stone surface phase of bright light, soft light and natural surface creatively, the blending effect with the greatest regret property is brought for design and space application, and one stone has three surfaces and the surface is colored.

Drawings

FIG. 1 is a process flow diagram of one example of the present invention;

FIG. 2 shows a schematic view of a granular dry-grain glaze production plant;

FIG. 3 shows a schematic diagram of an exemplary film dispenser configuration;

FIG. 4 shows an exemplary diagram of an engraved film;

FIG. 5 shows a schematic view of an exemplary embossing roll distribution device;

FIG. 6 shows a photograph of a shiny side of a particulate dry-grain glazed cloth stone-like tile made in accordance with an example of the present invention;

FIG. 7 shows a photograph of a granular dry-grained glaze (left) and a photograph of a natural surface of a granular dry-grained glaze cloth stone-like tile (right) made according to an example of the present invention;

FIG. 8 shows a large-scale tiling effect (matte) of a granular dry-grain glazed cloth stone-like tile made according to an example of the present invention;

fig. 9 shows a large-size patchwork effect (matte) of a granular dry-grain glazed cloth stone-like tile produced according to another example of the present invention.

Detailed Description

The present invention is further described below in conjunction with the following embodiments and the accompanying drawings, it being understood that the drawings and the following embodiments are illustrative of the invention only and are not limiting. In the present invention, the content percentages are mass percentages unless otherwise specified.

In one embodiment of the invention, dry grain cloth and ink-jet printing are combined, and on the basis of carrying out detailed research and analysis on the surface texture of the natural stone, a plurality of cloth film patterns and ink-jet patterns with unique effects of imitating the texture of the natural stone are designed through high-precision scanning and aesthetic processing. During production, the granular dry grain glaze is firstly prepared, then the granular dry grain glaze is layered and distributed on the blank according to different patterns, and optionally, the granular dry grain glaze and the powder dry grain glaze are mixed and then layered and distributed on the blank according to different patterns, namely, the granular dry grain glaze can be independently distributed or mixed with the powder dry grain glaze, and the distribution depends on the design requirements of the patterns. The powder dry grain glaze refers to round powdery dry grain glaze and can be colorful. The term "colorful" means that the colorful dry grain glaze has at least one color, and specifically, the colorful dry grain glaze can be a dry grain glaze of one color, can also be a mixture of multiple dry grain glazes of different colors, and can also be a dry grain glaze itself having multiple colors. Then adopting a mould with concave-convex effect or a plane mould to press green bricks; high-definition patterns of different stone textures are restored to the surface of the brick according to cloth patterns by a digital ink-jet printing technology, and finally, the stone-like product with vivid patterns, rich layers, natural textures, strong stereoscopic impression and granular sensation is obtained by high-temperature firing. In addition, after the ink-jet printing, protective glaze can be sprayed or fine fritted block dry particles can be uniformly scattered on the decorative pattern to strengthen the natural smooth effect of the surface.

Figure 1 shows a process flow diagram of one example of the invention. Hereinafter, the process flow will be specifically described with reference to fig. 1.

Pattern design

On the basis of carrying out detailed research and analysis on the surface texture of the natural stone, a plurality of dry grain glaze cloth patterns and ink-jet patterns imitating the texture effect of the natural stone are designed through high-precision scanning and aesthetic processing, and the dry grain glaze cloth patterns are matched and coordinated with the ink-jet patterns.

Specifically, the pattern is designed into two parts: firstly, the design of cloth patterns requires natural texture and stone effect; secondly, the design of the ink-jet pattern and the creative idea of color matching are derived from natural stone, and the artistic processing of removing impurities and retaining reality is carried out.

The two parts are designed in a mutual correlation mode, have complementary artistry and are formed through meticulous matching, and the natural fusion of the effects of the cloth pattern and the ink-jet pattern is ensured to be similar to the texture of natural stone.

Granular dry grain glaze

Hereinafter, a method for producing the granular dry-particle glaze will be described with reference to fig. 1 and 2. Fig. 2 shows a schematic view of a granular dry-grain glaze preparation apparatus. As shown in fig. 2The equipment comprises a powder hopper 1, wherein the powder hopper 1 can be loaded with glaze powder. The grain composition of the glaze powder can be as follows: 30 meshes: less than or equal to 16 percent, 30-60 meshes: more than or equal to 70 percent, 60-80 meshes: less than or equal to 11 percent, 80 meshes below: less than or equal to 6 percent. As shown in fig. 1, the preparation steps of the glaze powder can include: dry glaze proportioning, ball milling, sieving to remove iron, ageing the slurry, color matching and spray granulation. Wherein the slurry may be a single color. The glaze powder can be formed by mixing glaze powders with one color or different colors. Glaze powder having a specific color can be obtained by mixing glaze with toner. The glaze may have a chemical composition of: SiO 2₂：55～65％、Al₂O₃：18～22％、Fe₂O₃：0.3～0.7％、TiO₂：0.1～0.35％、CaO：0.3～4.0％、MgO：0.5～1.5％、K₂O：2.0～3.5％、Na₂O: 2.5-6.0%, loss on ignition: 4.5 to 5.5 percent.

A double roller 2 is arranged below the discharge port of the powder hopper 1. The twin rolls 2 are arranged in parallel and may have the same diameter, for example 500mm to 800 mm. Preferably, the discharge opening extends in the same direction as the axis of the twin roll 2. The rolls 2 are spaced apart by a distance of, for example, 1.5 to 3 mm. The gap between the rolls 2 may be aligned with the discharge opening. The twin rolls 2 are each rotatable inwardly (the space between them). The rotation speed can be 20-60 rpm. The glaze powder of multiple colors discharged from the discharge port of the powder hopper 1 is pressed by the twin rolls 2 in the space between the twin rolls 2, thereby forming a green cake.

A crushing device is arranged below the twin rolls 2. The billet cake extruded by the twin rolls 2 falls into a crushing device to be crushed. As shown in fig. 2, the crushing apparatus may include a vibrating screen 4 and a rotating bar 3 disposed in the vibrating screen 4. The rotating bar 3 may rotate in a clockwise or counterclockwise direction in a horizontal plane within the vibrating screen 4. The diameter of the rotating rod 3 may be 10mm to 30 mm. The rotating speed of the rotating rod 3 can be 50-120 r/min. The cake dropped into the vibrating screen 4 is crushed into particles by the rotation of the rotating rod 3.

The crushed particles fall into a material receiving conveyer belt 5 arranged below the vibrating screen 4 through the screen holes of the vibrating screen 4. The aperture of the sieve pore of the vibrating sieve 4 can be 6-10 meshes.

The particles falling into the receiving material conveying belt 5 are conveyed to a drum screen 7 through a conveying belt 6. The trommel 7 may extend in a horizontal direction or a nearly horizontal direction and may be rotatable about its axis. The rotating speed of the rotary screen 7 can be 10-60 revolutions per minute. The aperture of the drum screen 7 can be 8-20 meshes or 30-60 meshes. An undersize fine powder recovery hopper 8 may be provided below the drum sieve 7 to recover the sieved fine powder. The fine powder which is not sieved can be conveyed to a required position by an oversize material conveyer belt 9 to be used as granular dry grain glaze. A physical representation of an exemplary particulate dry glaze is shown in the left panel of fig. 7.

Powder dry particle glaze

In the invention, inorganic dry granular glaze can be adopted, which has the advantages of environmental protection and no toxicity. The chemical composition of the powder dry grain glaze can be consistent with the components of the common ceramic glaze. In one example, the chemical composition of the dry particle glaze is: SiO 2₂：55～65％、Al₂O₃：18～22％、Fe₂O₃：0.3～0.7％、TiO₂：0.1～0.35％、CaO：0.3～4.0％、MgO：0.5～1.5％、K₂O：2.0～3.5％、Na₂O: 2.5-6.0%, loss on ignition: 4.5 to 5.5 percent. The chemical compositions of the granular dry granular glaze and the powder dry granular glaze can be consistent.

The powder dry glaze can have various colors. For example, the pigment can be added into white base glaze slurry according to the design requirement of the pattern, and the mixture is sprayed by a spray tower according to the particle composition and the water content requirement to obtain the product. Various high and low temperature frits may be added to the dry glaze to adjust the expansion coefficient of the dry glaze to match the expansion coefficient of the green body. In addition, the dry grain glaze can also have the effects of flashing and the like by adding a metal flashing sheet and the like. In one example, the granular dry glaze can be mixed with dry glaze with multiple colors and/or glittering effects according to different proportions, and the surface decoration effect of the brick is richer by matching the granular dry glaze and the dry glaze with the multiple colors and/or glittering effects.

The grain composition of the powder dry grain glaze can be as follows:

more than 30 meshes: 0

30-60 meshes: 30 to 37.5 percent

60-80 meshes: 42.5 to 50 percent

80-100 meshes: 12.5 to 17.5 percent

Under 100 meshes: less than or equal to 5 percent;

the dry granular glaze has larger particles, generates less dust in the process of distributing and producing, and is easy to collect.

Blank material

On the basis of matching with various physical and chemical properties of dry particles, in order to control the deformation degree of the brick, the content of alumina can be properly increased on the basis of a general blank formula, so that the high-temperature deformation resistance of a blank is enhanced, the expansion coefficient of the blank is reduced, the difference of the expansion coefficients of the blank and a glaze is reduced, the adaptability of the blank glaze is improved, and the control of the shape of the brick fired by a kiln is facilitated. In one embodiment of the present invention, the formulation of the blank is: by weight, SiO₂：60～67％、Al₂O₃：19～23％、Fe₂O₃：0.5～1.0％、TiO₂：0.15～0.30％、CaO：0.4～0.7％、MgO：0.3～0.8％、K₂O：2.5～3.5％、Na₂O: 2.7-3.5%, loss on ignition: 4.5 to 5.5 percent. The blank of the formula has excellent slurry performance, green body drying rate and drying strength, and has excellent physical and chemical properties after being fired. In the invention, the expansion coefficients of the blank and the glaze can be matched by adjusting the formula of the blank and/or the glaze, for example, the difference of the expansion coefficients is less than 1 x 10^-5and/K. Therefore, the defects of deformation, cracking of the special-shaped dry grain glaze and the like after the brick body is fired can be effectively overcome. In one example, the formulation chemistry of the green body is shown in table 1, and the expansion coefficient of the green body and glaze (e.g., including granular dry glaze and powder dry glaze) is shown in table 2:

TABLE 1 Green body chemistry (wt%)

TABLE 2 comparison of expansion coefficients of green bodies and glazes

The method for producing the preform is not limited, and for example, a conventional method for producing a preform can be used. In one example, as shown in FIG. 1, the feedstock is first collected to conform to the formulated chemistry of the blank. Then, crushing the raw materials, preparing materials by a forklift, carrying out wet ball milling, sieving to remove iron, carrying out spray milling, and aging to obtain blank powder. The process parameters in the milling process can be as follows:

mud proportion: 1.69 to 1.71

Ball milling fineness: 1 to 1.2% (250 mesh screen)

Particle grading: 30 meshes: less than or equal to 16 percent

30-60 meshes: not less than 70 percent

60-80 meshes: less than or equal to 11 percent

80 meshes below: less than or equal to 6 percent

Moisture content of powder: 7.2 to 7.8 percent.

Cloth material

And (3) distributing the blank and the dry glaze, namely distributing the dry glaze on the blank according to different patterns by using a film. The dry glaze comprises granular dry glaze, and also can comprise powdery dry glaze and/or dry glaze with different colors and different shapes (such as at least one of sheet, packaged and strip shapes). In the invention, the dry grain cloth (fabric) can be carried out by adopting a multi-screen printing plate (multi-film). For example, 1 to 4 sheets of film can be used. The amount of each film stock (varying according to the pattern) can be: and (3) network connection film: 480-500 g, pattern film: 100-300 g. In one example, a TECNO ITALIA cloth device is adopted to mix dry glaze (such as granular dry glaze, or granular, flaky, wrapped and/or noodle-shaped dry glaze with different colors) according to different proportions, and a multi-film secondary cloth system is adopted to realize a multi-layer cloth effect. Specifically, dry glaze (such as granular dry glaze, or powder and special-shaped dry glaze with multiple colors) is secondarily distributed in a press mold cavity according to different proportions and patterns by using a perforated film (or carved film) in a layering manner. Fig. 3 shows a schematic view of an exemplary film dispenser configuration. As shown in fig. 3, the film distributor comprises a dry grain glaze hopper 11, and an engraved film 12 located below the dry grain glaze hopper 11. The engraved film 12 can be wound at both ends around two film drive shafts 13, respectively. Under the engraved film 12 is placed a green brick 14 to be distributed. The dry grain glaze is discharged from a discharge port of a dry grain glaze hopper 11 onto the engraved film 12. The relative position of the engraved film 12 on the green brick 14 is changed by the rotation of the film transmission shaft 3, and dry grain glaze is coated on the green brick 14. Figure 4 shows an example engraved film. As shown in fig. 4, the machine position films are a machine position film 1, a machine position film 2, a machine position film 3 and a machine position film 4, wherein four groups of films jointly form two stone texture patterns, one row on the left corresponds to one group of stone texture patterns, one row on the right corresponds to one group of stone texture patterns, the machine position films correspond to different dry grains in the hopper, the patterns are different, the green bricks respectively and sequentially pass through the carving films, and the dry grains are sequentially distributed on the green bricks according to the carving patterns by rotating the films. In the invention, the dry grain glaze cloth stone-like brick can be produced by combining a multi-film dry grain cloth technology and a digital ink-jet printing technology on the basis of a common ceramic brick production process, so that a pattern with a natural stone surface decoration effect is perfectly reproduced on the surface of the ceramic brick.

The dry particle material distribution can also be carried out by adopting a mode of positively beating a multi-machine-position pattern carving roller to carry out secondary material distribution. Figure 5 shows a schematic view of an exemplary embossing roll distribution device. As shown in fig. 5, the device for distributing the engraved roll comprises a plurality of hoppers 111, 112, 113: and embossing

cylinders

114, 115, 116, respectively, located below each hopper. Below the embossing cylinders, the pre-pressed green bricks 117 are moved by means of a large driving belt 118 along the direction of arrangement of the embossing cylinders. Granular dry glaze or dry grains with different colors or types are fed into a hopper on the carving roller through a material pipe, and when the pre-pressed green bricks pass through the roller, the dry grains in the roller are distributed on the green bricks according to the carved patterns through the carved holes. And then pressing and molding by a press, drying the molded green brick by a drying kiln, performing ink-jet printing and applying a covering glaze, and then performing kiln firing.

Initial forming

After the cloth is finished, the cloth is dry-pressed and molded as shown in fig. 1. In one embodiment, the green brick with certain strength is pre-pressed for the first time, then is subjected to ink-jet printing, and is subjected to compression molding by adopting a mold. In one example, pre-press forming is performed using a roll. The roller is a plane. The pressing pressure can be 300-360 bar, and the pressing period can be 3.5-3.8 times/min. In one example, the molding process is: a press machine type: PH 3000; molding pressure: 360 bar; and (3) pressing period: 3.8 times/min. Compared with the production of common glazed tiles, the invention reduces the wet glaze making process by adopting one-step molding of the blank glaze, does not additionally increase the emission of pollutants in the production and meets the requirement of environmental protection.

Ink jet printing

And (4) carrying out jet printing on the design pattern on the green brick by an ink jet machine erected on the distributor. As for the design of the pattern by ink jet printing, as shown in fig. 1, the material of the natural stone is selected, and high-precision scanning, pattern design, and color separation design are performed. The ink-jet printing pattern is matched with the dry particle cloth pattern to restore the high-definition patterns of different stone textures to the brick surface. Common colors of ink include pink, red brown, orange, light yellow, cyan, black, etc. The specific color can be selected according to the desired pattern to be formed.

Then, the mold is used for compression molding. In one example, a mold with a concave-convex effect or a plane mold is used for pressing a green brick. In order to achieve the surface concave-convex effect of the imitated natural stone, a mould with the surface effect of the imitated natural stone can be adopted. Specifically, the surface of the natural stone is scanned with high precision to obtain the pattern of the natural stone, and the pattern is distributed to the carving of each detail texture to obtain the surface effect of the imitated natural stone through artistic processing. That is, a mold with a vivid concave-convex effect is designed and manufactured by combining dry particle cloth (such as multi-machine engraved-roller dry particle cloth and multi-film cloth) and ink-jet patterns. During molding, the molding pressure can be 300-360 bar, and the pressing period can be 3.5-4.5 times/min.

The shaped green brick is dried as shown in fig. 1. The drying temperature may be 120 to 200 ℃, for example, 140 ℃, and the drying time may be 60 to 90 minutes, for example, 60 minutes. Preferably, the moisture content of the dried green body is less than or equal to 0.5 percent.

Optionally, after ink-jet printing, a protective glaze (e.g., a smolyticam, vitreric import glaze) or a full-polish clear glaze may be further applied. The high-definition patterns with different stone textures are restored to the surface of the brick by fusing a digital ink-jet printing technology and cloth patterns, and the matte or high-gloss product is formed by spraying protective glaze or fully polishing transparent glaze and then sintering at high temperature once. In one example, the formulation of the protective glaze may be: 12% of calcined kaolin, 5% of alumina, 18% of calcined talcum powder, 40% of potassium feldspar powder, 17% of calcite powder, 8% of kaolin, 0.2% of methyl, 0.35% of trimerization and 40% of water. The preparation of the protective glaze may include: collecting raw materials, preparing glaze materials, ball milling, sieving to remove iron, and aging for later use. According to the requirement, one of the glaze spraying and the glaze pouring can be selected to apply the protective glaze (or covering glaze). After the cover glaze is applied, on one hand, the antifouling effect can be achieved, and on the other hand, the ink-jet pattern can be protected from being worn off. In one example, the glazing process is as follows:

specific gravity of the cover glaze: 1.3-1.35 glaze spraying weight: 30-35 g/disc; or

Pouring glaze proportion: 1.78-1.86 weight of glaze pouring: 52. + -.2 g/disc.

Optionally, after ink-jet printing, the fine frit dry particles may be uniformly spread on the decorative pattern using a dry particle spreader to enhance the natural flow effect of the surface. The particle size of the fine frit dry particles may be 0.5 to 1.5 mm.

Then, as shown in fig. 1, the green body is subjected to primary firing. The firing temperature can be 1180-1220 ℃, and the firing period can be 60-70 minutes. After firing, the edge can be ground and packaged in grades. In one example, the firing process includes: and (3) firing in a kiln: a roller kiln; the highest firing temperature: 1220 ℃; and (3) firing period: and 65 min.

The obtained product has a unique stone-like texture style, and the dry particle cloth is highly matched with the ink-jet printing and die effects, so that the characteristic that the pattern of the product changes randomly is fully embodied. The stone-like brick has granular dry grain glaze decoration, can comprise three types of polished surfaces, matte surfaces and mould surfaces, and meets the requirements of consumers. FIG. 6 shows a photograph of a shiny side of a particulate dry-grain glazed cloth stone-like tile made in accordance with an example of the present invention; the right hand picture in fig. 7 shows a photograph of a natural surface of a particulate dry-grain glazed cloth stone-like tile made in accordance with one example of the present invention; FIG. 8 shows a large-scale tiling effect (matte) of a granular dry-grain glazed cloth stone-like tile made according to an example of the present invention; fig. 9 shows a large-size patchwork effect (matte) of a granular dry-grain glazed cloth stone-like tile produced according to another example of the present invention. The invention can make the surface of the ceramic tile show three-in-one three-dimensional stone surface phase of bright light, soft light and natural surface. The granular dry-grain glaze cloth stone-like brick has vivid patterns, rich layers, natural textures, strong stereoscopic impression and granular impression.

Granular dry grain glaze cloth and an ink-jet printing technology are combined in granular dry grain cloth natural stone tile imitating series products, so that the products have the characteristics of vivid stone imitating effect, rich layers, natural textures, strong stereoscopic impression, strong granular sensation and the like, and the product quality is greatly improved. The product has rich colors and sizes, wide application range, can be paved on the ground and also can be used for walls, can completely replace natural marble, and can be used for home decoration and commercial space. And can perform linear, curvilinear cutting and various complex processes.

The quality of the granular dry-grain glaze cloth stone-like brick obtained by the invention meets the requirement of GB/T23266-2009 standard appendix G, the radioactivity index meets the requirement of A-type decoration materials in GB6566-2001 standard, and the application range is not limited. The main technical indexes are shown in the following table:

item

Water absorption rate

Modulus of rupture

Resistance to cracking of glaze

Stain resistance

Internal irradiation

External irradiation

Unit of

％

MPa

------

Results

0.05

38

Conform to

Grade 5

0.6

1.0

The fracture strength was 2338N, and the steel sheet was free from cracks or peeling in the test of vibration resistance, and had a wear resistance of 1500 rpm (class 3). The product has excellent anti-skid performance and excellent mechanical properties, and is a preferred material for high-grade decoration.

Claims

1. A preparation method of a granular dry grain glaze cloth stone-like brick is characterized by comprising the following steps:

(1) extruding the glaze powder into a blank cake; crushing the blank cake, and then taking the crushed blank cake to be screened by an 8-20-mesh sieve, or screening by a 30-60-mesh sieve to obtain granular dry granular glaze;

(2) mixing the granular dry glaze particles and the colorful round powdery dry glaze particles, and then distributing the mixture on the pre-pressed blank body according to the existing pattern in layers, wherein the granulesThe granular dry grain glaze has the same chemical composition with the colorful round powdery dry grain glaze and is SiO₂：55～65%、Al₂O₃：18～22%、Fe₂O₃：0.3～0.7%、TiO₂：0.1～0.35%、CaO：0.3～4.0%、MgO：0.5～1.5%、K₂O：2.0～3.5%、Na₂O: 2.5-6.0%, loss on ignition: 4.5-5.5%, and the sum of the compositions is 100%; the grain composition of the round powdery dry grain glaze is as follows: 30-60 meshes: 30-37.5 wt%, 60-80 mesh: 42.5-50 wt%, 80-100 mesh: 12.5-17.5 wt%, 100 mesh: less than or equal to 5wt percent; the formula of the blank is as follows: by weight, SiO₂：60～67%、Al₂O₃：19～23%、Fe₂O₃：0.5～1.0%、TiO₂：0.15～0.30%、CaO：0.4～0.7%、MgO：0.3～0.8%、K₂O：2.5～3.5%、Na₂O: 2.7-3.5%, loss on ignition: 4.5-5.5%, and the sum of the compositions is 100%; the expansion coefficient difference between the blank and the glaze is less than 1 x 10 by adjusting the formula of the blank and/or the glaze^-5/K；

(3) After distributing, pressing a green brick;

(4) spraying and printing a design pattern on the green brick by using an ink-jet machine, and matching and coordinating the dry grain glaze cloth pattern in the step (2) with the ink-jet pattern to form a natural stone effect;

(5) and sintering the obtained green bricks.

2. The method according to claim 1, wherein the glaze powder has a water content of 6 to 10%.

3. The method according to claim 1 or 2, wherein the glaze powder has a particle size distribution of 30 mesh: less than or equal to 16 percent, 30-60 meshes: more than or equal to 70 percent, 60-80 meshes: less than or equal to 11 percent, 80 meshes below: less than or equal to 6 percent.

4. The preparation method according to claim 1, wherein in the step (2), the material is distributed by using a multi-machine-position carving roller direct beating secondary material distribution method.

5. The method according to claim 1, further comprising, between step (4) and step (5): applying protective glaze on the green brick, or uniformly scattering dry particles of fine frits on the decorative pattern.

6. The method of claim 5, wherein the fine frit dry particles have a particle size of: 0.5 to 1.5 mm.

7. A granular dry-grain glazed cloth stone-like tile produced by the production method of any one of claims 1 to 6.