Preparation method of large-particle terrazzo archaized brick with deep glaze three-dimensional effect

Abstract

The invention provides a preparation method of a large-particle terrazzo archaized brick with a deep glaze three-dimensional effect, and relates to the technical field of archaized brick preparation methods, and the method comprises the steps of green body preparation, cover glaze layer application, ink-jet printing, digital glue printing, high-calcium-boron dry particle distribution, archaized protection glaze spraying, firing and the like. According to the preparation method of the large-particle terrazzo archaized brick with the deep glaze three-dimensional effect, high-calcium-boron dry particles are accurately distributed at the positions of large particles and flaky particles in a terrazzo design pattern, and archaized protection glaze is arranged to form deep concave textures by utilizing the characteristics that the high-calcium-boron dry particles are very small in surface tension and physical property under the high-temperature condition, so that the large-particle terrazzo archaized brick with the deep glaze three-dimensional effect is obtained, and the large-particle terrazzo archaized brick with the deep glaze three-dimensional effect is obtained. The terrazzo-imitated archaized brick which has a good concave-convex three-dimensional effect and can realize a large-area concave-convex three-dimensional effect can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of methods for preparing antique bricks, and in particular to a method for preparing large-grain terrazzo antique bricks with deep glaze and three-dimensional effect. Background Art

[0002] Antique bricks are a type of glazed ceramic tile. The embryo is made of stoneware (water absorption rate is about 3%) or stoneware (water absorption rate is about 8%). They are used for building walls and floors. Because of the texture of the patterns, they are similar to the effect of stone veneers after long-term use. They are generally referred to as antique bricks in the industry. Antique bricks are not products of my country's building ceramics industry, but are introduced from abroad. Antique bricks evolved from glazed bricks. They are actually glazed porcelain bricks. Compared with ordinary glazed tiles, the difference is mainly reflected in the color of the glaze. Antique bricks belong to ordinary ceramic tiles and are basically the same as porcelain tiles. The only difference is that during the firing process, antique bricks imitate the previous styles to make them old. They are actually glazed porcelain tiles. They attract people's attention with their unique classical charm. In order to reflect the vicissitudes of time and the thickness of history, antique bricks create a nostalgic atmosphere through styles, colors, and patterns. Antique bricks are made of pure clay and are blue-gray after the process of "drinking water". They are different from ordinary antique tiles (such as porcelain tiles, vitrified tiles, ancient building blue bricks, etc.). They give people a simple, calm, simple, natural and peaceful beauty. They are breathable, water-absorbent, anti-oxidant, and air-purifying. They are an ideal decorative material for house walls and road decoration. With the improvement of people's living standards, consumers have put forward higher requirements for the decorative effects of decorative materials in modern building decoration materials, and are more inclined to personalized, refined, artistic and other diversified products. Tiles with patterns closer to natural stones and textures with more profound three-dimensional effects are becoming more and more popular in the market.

[0003] At present, the building ceramics industry usually uses the following processes to manufacture ceramic products with three-dimensional textures: ①, concave-convex mold process, which requires the preparation of concave-convex molds with various effects, and the design pattern texture cannot be aligned with the concave-convex effect of the mold, and the three-dimensional effect is not realistic. ②, the use of fine carving ink or sunken ink in combination with protective glaze to form a concave-convex effect. For example, the patent "A wax ceramic tile with three-dimensional decorative effect and its preparation method" disclosed in publication number CN 115677220A. The patent "A fully polished glazed tile with coarse and fine concave texture and its preparation process" disclosed in publication number CN 116253583A. The concave-convex effect manufactured by this process generally presents short lines or dots, and it is difficult to achieve a sheet-like concave-convex three-dimensional effect. The three-dimensional effect is not strong, and the printing of the sunken ink position will appear yellow-green appearance, affecting the appearance. ③, digital glaze inkjet printing, such as the patent "Preparation method and ceramic plate of imitation terrazzo ceramic plate with concave-convex texture" disclosed in publication number CN114195496A. The process is complicated, the digital glaze ink is easy to clog the nozzle, the production stability is poor, and the cost is high.

[0004] More specifically, patent CN 115677220A discloses "A wax ceramic tile with three-dimensional decorative effect and its preparation method" and patent CN 116253583A discloses "A fully polished glazed tile with coarse and fine concave texture and its preparation process", which use a digital inkjet machine to print fine carving ink and sunken ink in combination with protective glaze to form a concave-convex three-dimensional effect. The concave-convex three-dimensional effect formed by this process is precisely aligned with the texture of the design pattern, but the concave-convex three-dimensional effect is in the form of short lines or dots and the depth of the depression is limited. When printing the sunken ink position, the brick surface will present a yellow-green appearance, affecting the color of the sunken position, which is unnatural and unsightly.

[0005] Patent CN114195496A discloses a method for preparing a terrazzo-like ceramic plate with a concave-convex texture and a ceramic plate. The digital inkjet machine prints digital glaze ink and the glaze cabinet sprays digital glaze. The oily digital glaze ink and the water-based digital glaze repel each other on the blank, and a concave-convex three-dimensional effect is spontaneously formed. The concave-convex three-dimensional effect formed by this process is spontaneous, non-directional, diverse, and relatively natural, but the concave-convex three-dimensional effect cannot be accurately aligned with the large particles and flakes in the terrazzo pattern, and the large particles and flakes in the terrazzo design pattern cannot be reflected.

[0006] Patent CN112192739A discloses a process for manufacturing terrazzo-like ceramic plates and products obtained by using the process. It designs multiple sets of ceramic powder pressed tablet particle modules and combines them with a front lower hopper and a receiving belt to form an integrated distribution system for installation and use, so as to obtain a granular terrazzo texture. However, the molding method is still a mold distribution system, and the three-dimensional texture depends on the mold modeling. This process has a slow update speed for new products, the pattern cannot be flexibly adjusted according to demand, and the texture is single, the color is monotonous, the conversion process is complicated, and the labor intensity is high.

[0007] In order to overcome the shortcomings of the existing technology, this solution proposes a method for preparing large-grained terrazzo antique tiles with a deep glazed three-dimensional effect. It can effectively solve the problem of accurately positioning large particles and flakes in terrazzo patterns to form a concave-convex three-dimensional effect, and realize a variety of concave-convex three-dimensional effects, not only short lines or dots, but also large-area concave-convex three-dimensional effects. Summary of the invention

[0008] The purpose of the present invention is: in view of the above-mentioned problems, the present invention provides a method for preparing large-particle terrazzo antique tiles with deep glazed three-dimensional effect, by accurately arranging high-calcium boron dry particles in large-particle and flake-shaped positions in the terrazzo design pattern, and utilizing the physical characteristics of high-calcium boron dry particles with very small surface tension under high temperature conditions, the antique protective glaze is spread out to form a deep concave texture, so that a good concave-convex three-dimensional effect can be obtained, and a large-area concave-convex three-dimensional effect of imitation terrazzo antique tiles can be achieved.

[0009] The present invention is achieved through the following technical solutions:

[0010] The present invention provides: a method for preparing large-grained terrazzo antique tiles with deep glaze and three-dimensional effect, comprising the following steps:

[0011] (1) pressing by a press to obtain a green body;

[0012] (2) After being polished, the green body is dried in a drying kiln to obtain a green body;

[0013] (3) spraying water on the surface of the green blank to wet the surface of the green blank to obtain a wet green blank;

[0014] (4) applying a glaze layer on the wetted biscuit by a bell-jar glazing method to obtain a glazed body; the raw materials of the glaze include the following chemical components by weight percentage: IL: 2.0-5.0%; SiO2: 55-65%; Al2O3: 18-21%; Fe2O3: 0.1-0.2%; TiO2: 0.03-0.05%; CaO: 0.5-1.0%; MgO: 1.0-2.0%; K2O: 0.8-1.2%; Na2O: 4.0-5.0%; BaO: 5.0-6.0%; ZrO2: 4.0-5.0%; the sum of the weight percentages of the chemical components is 100%;

[0015] (5) inkjet printing a terrazzo pattern on the surface of the green body to which the glaze is applied, to obtain an inkjet-printed green body;

[0016] (6) Printing digital glue on the surface of the inkjet-printed blank using a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue;

[0017] (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1500-2000 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 1-3 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85%-90% in the range of 100-200 mesh, 5%-10% in the range of greater than 100 mesh, and less than 5% in the range of less than 200 mesh;

[0018] (8) Spraying antique protective glaze on the surface of the green body with high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; the process parameters of spraying antique protective glaze are: glaze spraying amount: 350-450g / m 2 , specific gravity is 1.35-1.45g / ml; two caliber spray guns are used to spray antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 8.0-12.0%; SiO2: 40-50 %; Al2O3: 15~20%; Fe2O3: 0.1~0.25%; TiO2: 0.05~0.15%; CaO: 6.0~9.0%; MgO: 2.0~4.0%; K2O: 3.0~5.0%; Na2O: 1.0~3.0%; BaO: 2.0~4.0%; SrO: 4.0~6.0%; ZnO: 3.0~5.0%; the sum of the percentages of the chemical composition is 100%;

[0019] (9) The green body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 40 to 45 minutes, and the highest temperature in the high temperature zone is 1200 to 1215°C.

[0020] Furthermore, the green body prepared in the step (1) is a green body having a large granular and flake-shaped layer imitating terrazzo; the preparation method of the green body having a large granular and flake-shaped layer imitating terrazzo is as follows: 1) firstly prepare the green body with a basic powder; 2) prepare the green body layer material: the green body layer material is mixed with a basic powder, a speckled powder, and a flake particle powder in a certain proportion, and the composition ratio is basic powder: speckled powder: flake particle powder = (45% to 65%): (6% to 10%): (20% to 40%); wherein the preparation method of the speckled powder is: select a color that matches the surface color of the product The preparation method of the flake particle powder is as follows: a colorant matching the surface color of the product is selected, an equal amount of base powder is added to the colorant, the mixture is stirred and mixed, and powder is obtained by spraying the powder in a spray tower, and the powder is prepared into flake particle powders of different particle sizes and random shapes by a granulator; 3) the blank layer material is spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo.

[0021] Furthermore, the water spraying amount in step (3) is: 60-100 g / m 2 Two spray guns are used for spraying water, and the size of the spray gun nozzle is: 0.52~0.62mm.

[0022] Furthermore, the process parameters of the glaze in step (4) are: the glaze amount is 480-580g / m 2 , specific gravity is 1.82-1.92 g / ml, flow rate is 26-32 seconds; the fineness requirement of the glaze is that the residue on the sieve of 325 mesh reaches 0.5-0.8wt%.

[0023] Furthermore, in the step (6), the digital glue printing grayscale value is between 20% and 100%, and the thermal decomposition temperature of the digital glue is between 600 and 800°C.

[0024] Furthermore, in the step (7), high calcium boron dry particles are distributed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1700-2000 r / min, and the dry particles not located on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 2-3 mm, thereby obtaining a blank distributed with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 86%-90% in the range of 100-200 mesh, 6%-10% in the range of greater than 100 mesh, and less than 5% in the range of less than 200 mesh.

[0025] Furthermore, the chemical composition of the high calcium boron dry particles in step (7) is: SiO2: 45% to 50%, Al2O3: 0.5% to 2%, Na2O: 8% to 12%, CaO: 14% to 18%, K2O: 0.05% to 0.1%, B2O3: 21% to 26%, Cs2O: 0.1% to 0.5%, and the sum of the mass percentages of the chemical composition is 100%.

[0026] Furthermore, in order to avoid the problem of uneven local glaze spraying and large deviation in the glaze spraying amount between the two sides and the middle position in the step (8), the spacing between adjacent spray guns A and spray gun B is 30 cm, and the spacing between adjacent spray guns B and spray gun B is 20 cm. In addition, taking the middle position of the brick blank as the reference line, the six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick blank is close to that in the middle position; the spray gun nozzle is above the brick blank, at a height of 80 to 90 cm from the surface of the brick blank, the spray gun is inclined at an angle of 45 degrees to the surface of the brick blank, and the gun mouth is tilted backwards; when spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4 to 4.5 MPa.

[0027] Furthermore, the fineness requirement of the antique protective glaze in step (8) is: the residue on the sieve of 325 mesh is 0.4-0.6wt%.

[0028] Furthermore, in step (9), in order to improve the feel of the cloth grain area, the surface of the fired large-grain terrazzo antique tile with a deep glazed three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400 mesh and 600 mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

[0029] The present invention discloses a method for preparing large-grained terrazzo antique tiles with deep glaze three-dimensional effect, which has the following beneficial effects:

[0030] 1. The method of the present invention uses digital glue printing to accurately coincide with the design pattern file, so that the dry particles are bonded with the digital glue to achieve accurate coincidence with the design pattern texture, and then the characteristics of high calcium boron dry particles in the high temperature firing process can be used to obtain a large area of ​​non-line, non-dot concave and convex three-dimensional effect;

[0031] 2. The preparation method of the present invention is relatively simple and convenient, and can realize flexible production. In view of the demand for personalized customized products in the current market, it can realize small batches and rapid production of various styles;

[0032] 3. At present, in the production process of antique porcelain tiles, the brick surface is prone to the defect of prickly heat bubbles, which seriously affects the feel of the brick surface. The method of the present invention develops a formula for antique brick surface glaze, which can effectively solve the problem of prickly heat bubbles on the antique brick surface. BaO is used to increase the viscosity of the glaze at low temperature during the firing process, and to melt the residual quartz at high temperature, thereby effectively solving the problem of prickly heat bubbles on antique bricks; the brick surface of the antique brick produced has a better touch and a more uniform glossiness of 6-10 degrees. Combined with terrazzo patterns, a better decorative effect can be formed, which can more realistically restore the effect of natural stone.

[0033] The invention discloses a method for preparing large-grained terrazzo antique bricks with deep glazed three-dimensional effect. The prepared green body is a green body with large-grained and flake-shaped layers of imitation terrazzo, so that after sintering, the green body has the imitation terrazzo granular and flake-shaped effects that are consistent with the design pattern on the surface of the brick green body, has the effect of being consistent inside and outside, and the surface effect of the prepared antique bricks is better; reasonably controlling the parameters and arrangement of the spray gun can avoid the problems of uneven local glaze spraying and large deviation of the glaze spraying amount between the two sides and the middle, and can effectively avoid the antique protective glaze blocking the spray head; lightly brushing the surface of the large-grained terrazzo antique bricks with deep glazed three-dimensional effect by a polishing machine; and then lightly brushing with 400-mesh and 600-mesh fiber grinding blocks can effectively improve the hand feel of the dry grain area of ​​the large-grained terrazzo antique bricks with deep glazed three-dimensional effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an overall picture of the product prepared in Example 1 of the present invention;

[0035] Figure 2 The three-dimensional effect of the brick surface details of the product prepared in Example 1 of the present invention Figure 1 ;

[0036] Figure 3 The three-dimensional effect of the brick surface details of the product prepared in Example 1 of the present invention Figure 2 . DETAILED DESCRIPTION

[0037] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0038] The present invention discloses a method for preparing large-grained terrazzo antique tiles with a deep glaze three-dimensional effect. The basic powder in step (1) of the following embodiment refers to the blank for making a blank, and the composition ratio of the blank can be configured according to actual conditions. The composition ratio of the basic powder used in the following embodiment is: IL: 3.8.0-4.6%; SiO2: 65-70%; Al2O3: 18-22%; Fe2O3: 0.3-0.8%; TiO2: 0.1-0.2%; CaO: 0.3-0.8%; MgO: 0.5-1.0%; K2O: 3.0-4.0%; Na2O: 2.0-3.0%, totaling 100%; the particle size distribution of the basic powder is: by mass percentage, 20 mesh: ≤1%, 30 mesh and above: 10-20%, 30-60 mesh: 65-75%, 60-80 mesh: ≤12%, below 80 mesh: ≤6%. The colorant used in the spotted powder and the flake particle powder can be one or a combination of multiple colorants; the spotted powder and the flake particle powder in step (1) of the following embodiment are respectively composed of the brown colorant of sequence number 7 and the gray colorant of sequence number 8, and the colorant used can be selected according to actual conditions, which should not limit the scope of protection of the present invention.

[0039] Example 1

[0040] A method for preparing large-grain terrazzo antique tiles with deep glaze three-dimensional effect, comprising the following steps:

[0041] (1) Pressing a blank to prepare a blank; the blank prepared is a blank having a terrazzo-like large-particle and flake-like layer; the method for preparing a blank having a terrazzo-like large-particle and flake-like layer is as follows: 1) first preparing a blank using a base powder; 2) preparing materials for the blank layer: the blank layer materials are mixed with a base powder, a spot powder, and a flake particle powder in a certain proportion, and the composition weight percentage ratio is base powder: spot powder: flake particle powder = 65%: 10%: 25%; wherein the method for preparing the spot powder is as follows: selecting a colorant that matches the surface color of the product, Adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a spotted powder with a moisture content of 6.0; the preparation method of the flake particle powder is as follows: selecting a colorant that matches the surface color of the product, adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a powder, and the powder is passed through a granulator to prepare flake particle powders of different particle sizes and random shapes; 3) using the blank layer material to spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo;

[0042] (2) After being polished, the green body is dried in a drying kiln to obtain a green body; the drying kiln is a four-layer drying kiln with a length of 100 m; the drying time is 40 min, and the moisture content of the green body after drying is controlled to be 0.2 wt%;

[0043] (3) Spray water on the surface of the blank at a rate of 60 g / m 2 Two spray guns are used for water spraying, and the nozzle size of the spray gun is: 0.52mm, to wet the surface of the blank to obtain a wetted blank;

[0044] (4) applying a top glaze layer on the wetted blank by a bell jar glazing method to obtain a blank with top glaze applied; the process parameters of the top glaze glazing are: the glaze amount is 480g / m 2 , specific gravity is 1.82g / ml, flow rate is 26 seconds; the raw materials of the glaze include the following chemical components by weight percentage: IL: 2.0%; SiO2: 60.15%; Al2O3: 21%; Fe2O3: 0.1%; TiO2: 0.05%; CaO: 0.5%; MgO: 2.0%; K2O: 1.2%; Na2O: 4.0%; BaO: 5.0%; ZrO2: 4.0%; the sum of the mass percentages of the chemical composition is 100%; the fineness requirement of the glaze is: the residue on the sieve of 325 mesh reaches 0.5wt%;

[0045] (5) inkjet printing a terrazzo pattern on the surface of the glazed body to obtain an inkjet-printed body; the color and texture of the design pattern can be appropriately adjusted according to the requirements of the three-dimensional effect;

[0046] (6) Printing digital glue on the surface of the inkjet-printed blank with a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced by using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing is completely overlapped with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; the grayscale value of the digital glue printing is 20%, and the thermal decomposition temperature of the digital glue is 600° C.;

[0047] (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1500 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 1 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85.5% of 100-200 mesh, 10% of particles larger than 100 mesh, and 4.5% of particles smaller than 200 mesh; the chemical composition of the high calcium boron dry particles is: SiO2: 50%, Al2O3: 0.5%, Na2O: 8%, CaO: 15.3%, K2O: 0.1%, B2O3: 26%, Cs2O: 0.1%, and the sum of the mass percentages of the chemical composition is 100%;

[0048] (8) Spraying antique protective glaze on the surface of the green body with high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; the process parameters for spraying the antique protective glaze are: glaze spraying amount: 350g / m 2 , with a specific gravity of 1.35g / ml; two caliber spray guns are used for spraying antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 8.0%; SiO2: 50%; Al2O3: 15%; Fe2O3: 0.25%; TiO2: 0.05%; CaO: 6.0%; MgO: 4.0%; K2O: 3.0%; Na2O: 2.7%; BaO: 2.0%; SrO: 4.0%; ZnO: 5.0%; the sum of the percentages of the chemical composition is 100%; the fineness requirement of the antique protective glaze is: the residue on the sieve of 325 mesh is 0.4wt%;

[0049] The spacing between adjacent spray guns A and B is 30 cm, and the spacing between adjacent spray guns B and B is 20 cm. The middle position of the brick is taken as the reference line. The six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick is close to that in the middle position. The spray gun nozzle is above the brick, and the height from the brick surface is 80 cm. The spray gun is inclined at an angle of 45 degrees to the brick surface, and the gun mouth is tilted backwards. When spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4 MPa.

[0050] (9) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 40 minutes, and the highest temperature in the high-temperature zone is 1200°C; in order to improve the feel of the dry grain area, the surface of the fired large-grained terrazzo antique brick with a deep glaze and three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400-mesh and 600-mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

[0051] Example 2

[0052] A method for preparing large-grain terrazzo antique tiles with deep glaze three-dimensional effect, comprising the following steps:

[0053] (1) Pressing a blank to form a blank; the blank prepared is a blank having a terrazzo-like large particle and flake-like layer; the preparation method of the blank having a terrazzo-like large particle and flake-like layer is as follows: 1) Firstly, a blank is prepared using a basic powder; 2) Preparing materials for the blank layer: the blank layer materials are mixed with a basic powder, a spot powder, and a flake particle powder in a certain proportion, and the weight percentage ratio is basic powder: spot powder: flake particle powder = 60%: 10%: 30%; wherein the preparation method of the spot powder is as follows: Select a colorant that matches the surface color of the product, Adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a spotted powder with a moisture content of 7.5%; the preparation method of the flake particle powder is as follows: selecting a colorant that matches the surface color of the product, adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a powder, and the powder is passed through a granulator to prepare flake particle powders of different particle sizes and random shapes; 3) using the blank layer material to spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo;

[0054] (2) After being polished, the green body is dried in a drying kiln to obtain a green body; the drying kiln is a four-layer drying kiln with a length of 100 m; the drying time is 60 min, and the moisture content of the green body after drying is controlled to be 0.4 wt%;

[0055] (3) Spray water on the surface of the blank, the amount of water sprayed is: 100g / m 2 Two spray guns are used for water spraying, and the nozzle size of the spray gun is: 0.62mm, to wet the surface of the blank to obtain a wetted blank;

[0056] (4) applying a top glaze layer on the wetted blank by a bell-shaped glaze pouring method to obtain a blank with top glaze applied; the process parameters of the top glaze pouring are: the glaze amount is 580 g / m 2 , specific gravity is 1.92g / ml, flow rate is 32 seconds; the raw materials of the glaze include the following chemical components by weight percentage: IL: 3.0%; SiO2: 60.15%; Al2O3: 20%; Fe2O3: 0.1%; TiO2: 0.05%; CaO: 0.5%; MgO: 1.0%; K2O: 1.2%; Na2O: 4.0%; BaO: 6.0%; ZrO2: 4.0%; the sum of the mass percentages of the chemical composition is 100%; the fineness requirement of the glaze is: the residue on the sieve of 325 mesh reaches 0.8wt%;

[0057] (5) inkjet printing a terrazzo pattern on the surface of the glazed body to obtain an inkjet-printed body; the color and texture of the design pattern can be appropriately adjusted according to the requirements of the three-dimensional effect;

[0058] (6) Printing digital glue on the surface of the inkjet-printed blank using a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; the grayscale value of the digital glue printing is 100%, and the thermal decomposition temperature of the digital glue is 800° C.;

[0059] (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 2000 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 3 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85.5% of 100-200 mesh, 10% of particles larger than 100 mesh, and 4.5% of particles smaller than 200 mesh; the chemical composition of the high calcium boron dry particles is: SiO2: 48%, Al2O3: 0.5%, Na2O: 11%, CaO: 15.3%, K2O: 0.1%, B2O3: 25%, Cs2O: 0.1%, and the sum of the mass percentages of the chemical composition is 100%;

[0060] (8) Spraying antique protective glaze on the surface of the green body with high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; the process parameters for spraying the antique protective glaze are: glaze spraying amount: 450g / m 2 , with a specific gravity of 1.45g / ml; two caliber spray guns are used to spray the antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 9.0%; SiO2: 49%; Al2O3: 16%; Fe2O3: 0.25%; TiO2: 0.05%; CaO: 6.0%; MgO: 3.0%; K2O: 3.0%; Na2O: 2.7%; BaO: 2.0%; SrO: 4.0%; ZnO: 5.0%; the sum of the percentages of the chemical composition is 100%; the fineness requirement of the antique protective glaze is: the residue on the sieve of 325 mesh is 0.6wt%;

[0061] The spacing between adjacent spray guns A and B is 30 cm, and the spacing between adjacent spray guns B and B is 20 cm. The middle position of the brick is taken as the reference line. The six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick is close to that in the middle position. The spray gun nozzle is above the brick, at a height of 90 cm from the surface of the brick, and the spray gun is inclined at an angle of 45 degrees to the surface of the brick, and the gun mouth is tilted backwards. When spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4.5 MPa.

[0062] (9) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 45 minutes, and the highest temperature in the high-temperature zone is 1215°C; in order to improve the feel of the dry grain area, the surface of the fired large-grained terrazzo antique brick with a deep glaze and three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400-mesh and 600-mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

[0063] Example 3

[0064] A method for preparing large-grain terrazzo antique tiles with deep glaze three-dimensional effect, comprising the following steps:

[0065] (1) Pressing a blank to form a blank; the blank prepared is a blank having a terrazzo-like large particle and flake-like layer; the preparation method of the blank having a terrazzo-like large particle and flake-like layer is as follows: 1) Firstly, a blank is prepared using a basic powder; 2) Preparing materials for the blank layer: the blank layer materials are mixed with a basic powder, a spot powder, and a flake particle powder in a certain proportion, and the weight percentage ratio is basic powder: spot powder: flake particle powder = 63%: 10%: 27%; wherein the preparation method of the spot powder is as follows: Select a colorant that matches the surface color of the product, Adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a spotted powder with a moisture content of 6.5%; the preparation method of the flake particle powder is as follows: selecting a colorant that matches the surface color of the product, adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a powder, and the powder is passed through a granulator to prepare flake particle powders of different particle sizes and random shapes; 3) using the blank layer material to spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo;

[0066] (2) After being polished, the green body is dried in a drying kiln to obtain a green body; the drying kiln is a four-layer drying kiln with a length of 100 m; the drying time is 50 min, and the moisture content of the green body after drying is controlled to be 0.3 wt%;

[0067] (3) Spray water on the surface of the blank at a rate of 80 g / m 2 Two spray guns are used for water spraying, and the nozzle size of the spray gun is: 0.55mm, to wet the surface of the blank to obtain a wetted blank;

[0068] (4) applying a top glaze layer on the wetted biscuit by a bell-shaped glazing method to obtain a glazed body; the process parameters of the top glazing are: the glaze amount is 520 g / m 2 , specific gravity is 1.88g / ml, flow rate is 28 seconds; the raw materials of the glaze include the following chemical components by weight percentage: IL: 4.0%; SiO2: 58.05%; Al2O3: 21%; Fe2O3: 0.1%; TiO2: 0.05%; CaO: 0.6%; MgO: 1.9%; K2O: 1.1%; Na2O: 4.2%; BaO: 5.0%; ZrO2: 4.0%; the sum of the mass percentages of the chemical composition is 100%; the fineness requirement of the glaze is: the residue on the sieve of 325 mesh reaches 0.7wt%;

[0069] (5) inkjet printing a terrazzo pattern on the surface of the glazed body to obtain an inkjet-printed body; the color and texture of the design pattern can be appropriately adjusted according to the requirements of the three-dimensional effect;

[0070] (6) Printing digital glue on the surface of the inkjet-printed blank with a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced by using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; the grayscale value of the digital glue printing is 60%, and the thermal decomposition temperature of the digital glue is 700° C.;

[0071] (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1700 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 2 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85.5% of 100-200 mesh, 10% of particles larger than 100 mesh, and 4.5% of particles smaller than 200 mesh; the chemical composition of the high calcium boron dry particles is: SiO2: 49%, Al2O3: 1.5%, Na2O: 9%, CaO: 14.3%, K2O: 0.1%, B2O3: 26%, Cs2O: 0.1%, and the sum of the mass percentages of the chemical composition is 100%;

[0072] (8) Spraying antique protective glaze on the surface of the green body with high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; the process parameters for spraying antique protective glaze are: glaze spraying amount: 380g / m 2, with a specific gravity of 1.38g / ml; two caliber spray guns are used to spray the antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 9.0%; SiO2: 48%; Al2O3: 16%; Fe2O3: 0.25%; TiO2: 0.05%; CaO: 7.0%; MgO: 3.0%; K2O: 3.0%; Na2O: 2.7%; BaO: 2.0%; SrO: 4.0%; ZnO: 5.0%; the sum of the percentages of the chemical composition is 100%; the fineness requirement of the antique protective glaze is: the residue on the sieve of 325 mesh is 0.5wt%;

[0073] The spacing between adjacent spray guns A and B is 30 cm, and the spacing between adjacent spray guns B and B is 20 cm. The middle position of the brick is taken as the reference line. The six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick is close to that in the middle position. The spray gun nozzle is above the brick, and the height from the brick surface is 85 cm. The spray gun is inclined at an angle of 45 degrees to the brick surface, and the gun mouth is tilted backwards. When spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4.3 MPa.

[0074] (9) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 42 minutes, and the highest temperature in the high-temperature zone is 1210°C; in order to improve the feel of the dry grain area, the surface of the fired large-grained terrazzo antique brick with a deep glaze and three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400-mesh and 600-mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

[0075] Example 4

[0076] A method for preparing large-grain terrazzo antique tiles with deep glaze three-dimensional effect, comprising the following steps:

[0077] (1) a press presses the blank to form a blank;

[0078] (2) After being polished, the green body is dried in a drying kiln to obtain a green body; the drying kiln is a four-layer drying kiln with a length of 100 m; the drying time is 50 min, and the moisture content of the green body after drying is controlled to be 0.3 wt%;

[0079] (3) Spray water on the surface of the blank at a rate of 80 g / m 2Two spray guns are used for water spraying, and the nozzle size of the spray gun is: 0.55mm, to wet the surface of the blank to obtain a wetted blank;

[0080] (4) applying a top glaze layer on the wetted biscuit by a bell-shaped glazing method to obtain a glazed body; the process parameters of the top glazing are: the glaze amount is 520 g / m 2 , specific gravity is 1.88g / ml, flow rate is 28 seconds; the raw materials of the glaze include the following chemical components by weight percentage: IL: 4.0%; SiO2: 58.05%; Al2O3: 21%; Fe2O3: 0.1%; TiO2: 0.05%; CaO: 0.6%; MgO: 1.9%; K2O: 1.1%; Na2O: 4.2%; BaO: 5.0%; ZrO2: 4.0%; the sum of the mass percentages of the chemical composition is 100%; the fineness requirement of the glaze is: the residue on the sieve of 325 mesh reaches 0.7wt%;

[0081] (5) inkjet printing a terrazzo pattern on the surface of the glazed body to obtain an inkjet-printed body; the color and texture of the design pattern can be appropriately adjusted according to the requirements of the three-dimensional effect;

[0082] (6) Printing digital glue on the surface of the inkjet-printed blank with a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced by using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; the grayscale value of the digital glue printing is 60%, and the thermal decomposition temperature of the digital glue is 700° C.;

[0083] (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1700 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 2 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85.5% of 100-200 mesh, 10% of particles larger than 100 mesh, and 4.5% of particles smaller than 200 mesh; the chemical composition of the high calcium boron dry particles is: SiO2: 49%, Al2O3: 1.5%, Na2O: 9%, CaO: 14.3%, K2O: 0.1%, B2O3: 26%, Cs2O: 0.1%, and the sum of the mass percentages of the chemical composition is 100%;

[0084] (8) Spraying antique protective glaze on the surface of the green body with high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; the process parameters for spraying antique protective glaze are: glaze spraying amount: 380g / m 2, with a specific gravity of 1.38g / ml; two caliber spray guns are used to spray the antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 9.0%; SiO2: 48%; Al2O3: 16%; Fe2O3: 0.25%; TiO2: 0.05%; CaO: 7.0%; MgO: 3.0%; K2O: 3.0%; Na2O: 2.7%; BaO: 2.0%; SrO: 4.0%; ZnO: 5.0%; the sum of the percentages of the chemical composition is 100%; the fineness requirement of the antique protective glaze is: the residue on the sieve of 325 mesh is 0.5wt%;

[0085] The spacing between adjacent spray guns A and B is 30 cm, and the spacing between adjacent spray guns B and B is 20 cm. The middle position of the brick is taken as the reference line. The six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick is close to that in the middle position. The spray gun nozzle is above the brick, and the height from the brick surface is 85 cm. The spray gun is inclined at an angle of 45 degrees to the brick surface, and the gun mouth is tilted backwards. When spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4.3 MPa.

[0086] (9) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 42 minutes, and the highest temperature in the high-temperature zone is 1210°C; in order to improve the feel of the dry grain area, the surface of the fired large-grained terrazzo antique brick with a deep glaze and three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400-mesh and 600-mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

[0087] Example 5

[0088] A method for preparing large-grain terrazzo antique tiles with deep glaze three-dimensional effect, comprising the following steps:

[0089] (1) Pressing a blank to form a blank; the blank prepared is a blank having a terrazzo-like large particle and flake-like layer; the preparation method of the blank having a terrazzo-like large particle and flake-like layer is as follows: 1) Firstly, a blank is prepared using a basic powder; 2) Preparing materials for the blank layer: the blank layer materials are mixed with a basic powder, a spot powder, and a flake particle powder in a certain proportion, and the weight percentage ratio is basic powder: spot powder: flake particle powder = 63%: 10%: 27%; wherein the preparation method of the spot powder is as follows: Select a colorant that matches the surface color of the product, Adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a spotted powder with a moisture content of 6.5%; the preparation method of the flake particle powder is as follows: selecting a colorant that matches the surface color of the product, adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a powder, and the powder is passed through a granulator to prepare flake particle powders of different particle sizes and random shapes; 3) using the blank layer material to spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo;

[0090] (2) After being polished, the green body is dried in a drying kiln to obtain a green body; the drying kiln is a four-layer drying kiln with a length of 100 m; the drying time is 50 min, and the moisture content of the green body after drying is controlled to be 0.3 wt%;

[0091] (3) Spray water on the surface of the blank at a rate of 80 g / m 2 Two spray guns are used for water spraying, and the nozzle size of the spray gun is: 0.55mm, to wet the surface of the blank to obtain a wetted blank;

[0092] (4) applying a top glaze layer on the wetted biscuit by a bell-shaped glazing method to obtain a glazed body; the process parameters of the top glazing are: the glaze amount is 520 g / m 2 , specific gravity is 1.88g / ml, flow rate is 28 seconds; the raw materials of the glaze include the following chemical components by weight percentage: IL: 4.0%; SiO2: 58.05%; Al2O3: 21%; Fe2O3: 0.1%; TiO2: 0.05%; CaO: 0.6%; MgO: 1.9%; K2O: 1.1%; Na2O: 4.2%; BaO: 5.0%; ZrO2: 4.0%; the sum of the mass percentages of the chemical composition is 100%; the fineness requirement of the glaze is: the residue on the sieve of 325 mesh reaches 0.7wt%;

[0093] (5) inkjet printing a terrazzo pattern on the surface of the glazed body to obtain an inkjet-printed body; the color and texture of the design pattern can be appropriately adjusted according to the requirements of the three-dimensional effect;

[0094] (6) Printing digital glue on the surface of the inkjet-printed blank with a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced by using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; the grayscale value of the digital glue printing is 60%, and the thermal decomposition temperature of the digital glue is 700° C.;

[0095] (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1700 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 2 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85.5% of 100-200 mesh, 10% of particles larger than 100 mesh, and 4.5% of particles smaller than 200 mesh; the chemical composition of the high calcium boron dry particles is: SiO2: 49%, Al2O3: 1.5%, Na2O: 9%, CaO: 14.3%, K2O: 0.1%, B2O3: 26%, Cs2O: 0.1%, and the sum of the mass percentages of the chemical composition is 100%;

[0096] (8) Spraying antique protective glaze on the surface of the green body with high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; the process parameters for spraying antique protective glaze are: glaze spraying amount: 380g / m 2 , with a specific gravity of 1.38g / ml; two caliber spray guns are used to spray the antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 9.0%; SiO2: 48%; Al2O3: 16%; Fe2O3: 0.25%; TiO2: 0.05%; CaO: 7.0%; MgO: 3.0%; K2O: 3.0%; Na2O: 2.7%; BaO: 2.0%; SrO: 4.0%; ZnO: 5.0%; the sum of the percentages of the chemical composition is 100%; the fineness requirement of the antique protective glaze is: the residue on the sieve of 325 mesh is 0.5wt%;

[0097] The spacing between adjacent spray guns A and B is 30 cm, and the spacing between adjacent spray guns B and B is 20 cm. The middle position of the brick is taken as the reference line. The six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick is close to that in the middle position. The spray gun nozzle is above the brick, and the height from the brick surface is 85 cm. The spray gun is inclined at an angle of 45 degrees to the brick surface, and the gun mouth is tilted backwards. When spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4.3 MPa.

[0098] (9) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 42 minutes, and the highest temperature in the high temperature zone is 1210°C.

[0099] Comparative Example 1

[0100] A method for preparing large-grain terrazzo antique tiles with deep glaze three-dimensional effect, comprising the following steps:

[0101] (1) Pressing a blank to form a blank; the blank prepared is a blank having a terrazzo-like large particle and flake-like layer; the preparation method of the blank having a terrazzo-like large particle and flake-like layer is as follows: 1) Firstly, a blank is prepared using a basic powder; 2) Preparing materials for the blank layer: the blank layer materials are mixed with a basic powder, a spot powder, and a flake particle powder in a certain proportion, and the weight percentage ratio is basic powder: spot powder: flake particle powder = 63%: 10%: 27%; wherein the preparation method of the spot powder is as follows: Select a colorant that matches the surface color of the product, Adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a spotted powder with a moisture content of 6.5%; the preparation method of the flake particle powder is as follows: selecting a colorant that matches the surface color of the product, adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a powder, and the powder is passed through a granulator to prepare flake particle powders of different particle sizes and random shapes; 3) using the blank layer material to spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo;

[0102] (2) After being polished, the green body is dried in a drying kiln to obtain a green body; the drying kiln is a four-layer drying kiln with a length of 100 m; the drying time is 50 min, and the moisture content of the green body after drying is controlled to be 0.3 wt%;

[0103] (3) Spray water on the surface of the blank at a rate of 80 g / m 2 Two spray guns are used for water spraying, and the nozzle size of the spray gun is: 0.55mm, to wet the surface of the blank to obtain a wetted blank;

[0104] (4) applying a top glaze layer on the wetted biscuit by a bell-shaped glazing method to obtain a glazed body; the process parameters of the top glazing are: the glaze amount is 520 g / m 2 , specific gravity is 1.88g / ml, flow rate is 28 seconds; the raw materials of the glaze include the following chemical components by weight percentage: IL: 4.0%; SiO2: 58.05%; Al2O3: 21%; Fe2O3: 0.1%; TiO2: 0.05%; CaO: 0.6%; MgO: 1.9%; K2O: 1.1%; Na2O: 4.2%; BaO: 5.0%; ZrO2: 4.0%; the sum of the mass percentages of the chemical composition is 100%; the fineness requirement of the glaze is: the residue on the sieve of 325 mesh reaches 0.7wt%;

[0105] (5) inkjet printing a terrazzo pattern on the surface of the glazed body to obtain an inkjet-printed body; the color and texture of the design pattern can be appropriately adjusted according to the requirements of the three-dimensional effect;

[0106] (6) Printing digital glue on the surface of the inkjet-printed blank with a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced by using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; the grayscale value of the digital glue printing is 60%, and the thermal decomposition temperature of the digital glue is 700° C.;

[0107] (7) Spraying antique protective glaze on the surface of the blank printed with digital glue to obtain a blank sprayed with antique protective glaze; the process parameters for spraying antique protective glaze are: glaze spraying amount: 380g / m 2 , with a specific gravity of 1.38g / ml; two caliber spray guns are used to spray the antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 9.0%; SiO2: 48%; Al2O3: 16%; Fe2O3: 0.25%; TiO2: 0.05%; CaO: 7.0%; MgO: 3.0%; K2O: 3.0%; Na2O: 2.7%; BaO: 2.0%; SrO: 4.0%; ZnO: 5.0%; the sum of the percentages of the chemical composition is 100%; the fineness requirement of the antique protective glaze is: the residue on the sieve of 325 mesh is 0.5wt%;

[0108] The spacing between adjacent spray guns A and B is 30 cm, and the spacing between adjacent spray guns B and B is 20 cm. The middle position of the brick is taken as the reference line. The six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick is close to that in the middle position. The spray gun nozzle is above the brick, and the height from the brick surface is 85 cm. The spray gun is inclined at an angle of 45 degrees to the brick surface, and the gun mouth is tilted backwards. When spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4.3 MPa.

[0109] (8) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 42 minutes, and the highest temperature in the high-temperature zone is 1210°C; in order to improve the feel of the dry grain area, the surface of the fired large-grained terrazzo antique brick with a deep glaze and three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400-mesh and 600-mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

[0110] Comparative Example 2

[0111] A method for preparing large-grain terrazzo antique tiles with deep glaze three-dimensional effect, comprising the following steps:

[0112] (1) Pressing a blank to form a blank; the blank prepared is a blank having a terrazzo-like large particle and flake-like layer; the preparation method of the blank having a terrazzo-like large particle and flake-like layer is as follows: 1) Firstly, a blank is prepared using a basic powder; 2) Preparing materials for the blank layer: the blank layer materials are mixed with a basic powder, a spot powder, and a flake particle powder in a certain proportion, and the weight percentage ratio is basic powder: spot powder: flake particle powder = 63%: 10%: 27%; wherein the preparation method of the spot powder is as follows: Select a colorant that matches the surface color of the product, Adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a spotted powder with a moisture content of 6.5%; the preparation method of the flake particle powder is as follows: selecting a colorant that matches the surface color of the product, adding the same weight of base powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a powder, and the powder is passed through a granulator to prepare flake particle powders of different particle sizes and random shapes; 3) using the blank layer material to spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo;

[0113] (2) After being polished, the green body is dried in a drying kiln to obtain a green body; the drying kiln is a four-layer drying kiln with a length of 100 m; the drying time is 50 min, and the moisture content of the green body after drying is controlled to be 0.3 wt%;

[0114] (3) Spray water on the surface of the blank at a rate of 80 g / m 2 Two spray guns are used for water spraying, and the nozzle size of the spray gun is: 0.55mm, to wet the surface of the blank to obtain a wetted blank;

[0115] (4) applying a top glaze layer on the wetted biscuit by a bell-shaped glazing method to obtain a glazed body; the process parameters of the top glazing are: the glaze amount is 520 g / m 2 , specific gravity is 1.88g / ml, flow rate is 28 seconds; the raw materials of the glaze include the following chemical components by weight percentage: IL: 5.0%; SiO2: 59.05%; Al2O3: 21%; Fe2O3: 0.1%; TiO2: 0.05%; CaO: 0.6%; MgO: 1.9%; K2O: 1.1%; Na2O: 4.2%; BaO: 3.0%; ZrO2: 4.0%; the sum of the mass percentages of the chemical composition is 100%; the fineness requirement of the glaze is: the residue on the sieve of 325 mesh reaches 0.7wt%;

[0116] (5) inkjet printing a terrazzo pattern on the surface of the glazed body to obtain an inkjet-printed body; the color and texture of the design pattern can be appropriately adjusted according to the requirements of the three-dimensional effect;

[0117] (6) Printing digital glue on the surface of the inkjet-printed blank with a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced by using the terrazzo pattern file printed by inkjet in step (5), and through precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; the grayscale value of the digital glue printing is 60%, and the thermal decomposition temperature of the digital glue is 700° C.;

[0118] (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1700 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 2 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85.5% of 100-200 mesh, 10% of particles larger than 100 mesh, and 4.5% of particles smaller than 200 mesh; the chemical composition of the high calcium boron dry particles is: SiO2: 49%, Al2O3: 1.5%, Na2O: 9%, CaO: 14.3%, K2O: 0.1%, B2O3: 26%, Cs2O: 0.1%, and the sum of the mass percentages of the chemical composition is 100%;

[0119] (8) Spraying antique protective glaze on the surface of the green body with high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; the process parameters for spraying antique protective glaze are: glaze spraying amount: 380g / m 2, with a specific gravity of 1.38g / ml; two caliber spray guns are used to spray the antique protective glaze: 0.52mm spray gun A and 0.62mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 9.0%; SiO2: 48%; Al2O3: 16%; Fe2O3: 0.25%; TiO2: 0.05%; CaO: 7.0%; MgO: 3.0%; K2O: 3.0%; Na2O: 2.7%; BaO: 2.0%; SrO: 4.0%; ZnO: 5.0%; the sum of the percentages of the chemical composition is 100%; the fineness requirement of the antique protective glaze is: the residue on the sieve of 325 mesh is 0.5wt%;

[0120] The spacing between adjacent spray guns A and B is 30 cm, and the spacing between adjacent spray guns B and B is 20 cm. The middle position of the brick is taken as the reference line. The six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick is close to that in the middle position. The spray gun nozzle is above the brick, and the height from the brick surface is 85 cm. The spray gun is inclined at an angle of 45 degrees to the brick surface, and the gun mouth is tilted backwards. When spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4.3 MPa.

[0121] (9) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 42 minutes, and the highest temperature in the high-temperature zone is 1210°C; in order to improve the feel of the dry grain area, the surface of the fired large-grained terrazzo antique brick with a deep glaze and three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400-mesh and 600-mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

[0122] The parameters of the terrazzo antique tiles obtained in the above-mentioned Examples 1-5 and Comparative Examples 1-2 are shown in Table 1 below:

[0123] Table 1

[0124]

[0125]

[0126] By comparing the visual effects of the large-grained terrazzo antique tiles with deep glaze three-dimensional effects in Examples 1-3 and 4, it can be seen that the visual effects of the products of Examples 1-3 are better. It can be seen that the prepared green body is a green body with imitation terrazzo large-grained and flaky layers, so that the green body has imitation terrazzo granular and flaky effects after sintering, which are consistent with the design pattern on the surface of the brick body, and have a consistent effect inside and outside, and the surface effect of the produced antique tiles is better.

[0127] The present invention discloses a method for preparing a large-particle terrazzo antique brick with a deep glazed three-dimensional effect. The method adopts digital glue printing to accurately overlap with the design pattern file, so that the dry particles are bonded with the digital glue to achieve accurate overlap with the design pattern texture, and then the characteristics of high-calcium boron dry particles in the high-temperature firing process are used to obtain a non-linear, non-point-shaped large-area concave-convex three-dimensional effect; the preparation method of the method of the present invention is relatively simple and convenient, and flexible production can be achieved. In view of the demand for personalized customized products in the current market, small batches and multiple styles of rapid production can be achieved; the method of the present invention develops a formula for antique brick glaze, which can effectively solve the problem of easy occurrence of prickly heat bubbles on the antique brick surface, and BaO is used during the firing process to increase the viscosity of the glaze at low temperature and melt the residual quartz at high temperature, thereby effectively solving the problem of prickly heat bubbles on antique bricks; the brick surface of the obtained antique brick has a better touch and a more uniform glossiness of 6-10 degrees. Combining the terrazzo pattern can form a better decorative effect, and the effect of natural stone can be restored more realistically. Reasonable control of spray gun parameters and arrangement can avoid problems such as uneven local glaze spraying and large deviation in the amount of glaze sprayed between the sides and the middle, and can effectively prevent the antique protective glaze from clogging the nozzle; lightly brush the surface of the large-grained terrazzo antique tile with a deep glaze and three-dimensional effect with a polishing machine; then lightly brush with 400 mesh and 600 mesh fiber grinding blocks, which can effectively improve the feel of the dry grain area of ​​the large-grained terrazzo antique tile with a deep glaze and three-dimensional effect.

[0128] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A method for preparing large-grained terrazzo antique tiles with deep glaze and three-dimensional effect, characterized in that: The following steps are involved: (1) Pressing by a press to obtain a green body; (2) After being polished, the green body is dried in a drying kiln to obtain a green body; (3) spraying water on the surface of the green blank to wet the surface of the green blank to obtain a wet green blank; (4) applying a top glaze layer on the wetted biscuit by a bell jar glazing method to obtain a glazed body; the raw materials of the top glaze include the following chemical components by weight percentage: IL: 2.0-5.0%; SiO2: 55-65%; Al2O3: 18-21%; Fe2O3: 0.1-0.2%; TiO2: 0.03-0.05%; CaO: 0.5~1.0%; MgO: 1.0~2.0%; K2O: 0.8~1.2%; Na2O: 4.0~5.0%; BaO: 5.0~6.0%; ZrO2: 4.0~5.0%; the sum of the mass percentages of the chemical composition is 100%; (5) inkjet printing a terrazzo pattern on the surface of the green body to which the glaze is applied, to obtain an inkjet-printed green body; (6) Printing digital glue on the surface of the inkjet-printed blank using a glue dryer, wherein the file for printing the digital glue is a large-grained, flake-shaped terrazzo pattern file produced using the terrazzo pattern file printed by inkjet in step (5), and by precise alignment, ensuring that the position of the digital glue printing completely overlaps with the terrazzo pattern printed by the digital inkjet machine, thereby obtaining a blank printed with digital glue; (7) High calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1500-2000 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 1-3 mm, thereby obtaining a blank covered with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 85%-90% in the range of 100-200 mesh, 5%-10% in the range of greater than 100 mesh, and less than 5% in the range of less than 200 mesh; (8) spraying antique protective glaze on the surface of the green body made of high calcium boron dry particles to obtain a green body sprayed with antique protective glaze; The process parameters of spraying antique protective glaze are: spraying glaze amount: 350~450g / m 2 , with a specific gravity of 1.35-1.45 g / ml; two caliber spray guns are used for spraying antique protective glaze: 0.52 mm spray gun A and 0.62 mm spray gun B; there are two groups of spray guns A and four groups of spray guns B; the installation order of the six groups of spray guns is: spray gun A→spray gun B→spray gun B→spray gun B→spray gun A; the raw materials of the antique protective glaze include the following chemical components by weight percentage: IL: 8.0-12.0%; SiO2: 40~50%; Al2O3: 15~20%; Fe2O3: 0.1~0.25%; TiO2: 0.05~0.15%; CaO: 6.0-9.0%; MgO: 2.0~4.0%; K2O: 3.0~5.0%; Na2O: 1.0~3.0%; BaO: 2.0~4.0%; SrO: 4.0-6.0%; ZnO: 3.0-5.0%; the sum of the percentages of the chemical composition is 100%; (9) The body sprayed with antique protective glaze is dried in a pre-kiln drying kiln and then fired in a kiln to obtain the large-grained terrazzo antique brick with a deep glaze and three-dimensional effect; the kiln firing cycle is 40 to 45 minutes, and the highest temperature in the high temperature zone is 1200 to 1215°C.

2. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: The green body prepared in step (1) is a green body with large granular and flake-shaped layers imitating terrazzo; the preparation method of the green body with large granular and flake-shaped layers imitating terrazzo is as follows: 1) firstly prepare the green body with basic powder; 2) prepare the green body layer material: the green body layer material is mixed with basic powder, spot powder and flake particle powder in a certain proportion, and the composition ratio is basic powder: spot powder: flake particle powder = (45% to 65%): (6% to 10%): (20% to 40%); wherein the preparation method of the spot powder is: select a colorant that matches the surface color of the product, Adding an equal weight portion of basic powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a spotted powder with a moisture content of 6.0-7.5%; the preparation method of the flake particle powder is as follows: selecting a colorant that matches the surface color of the product, adding an equal weight portion of basic powder to the colorant, stirring and mixing evenly, and then passing through a spray tower to obtain a powder, and the powder is passed through a granulator to prepare flake particle powders of different particle sizes and random shapes; 3) using the blank layer material to spread all over or twice on the blank in step 1) to obtain a blank with large granular and flake-like layers imitating terrazzo.

3. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: The water spraying amount in step (3) is: 60-100 g / m 2 Two spray guns are used for spraying water, and the size of the spray gun nozzle is: 0.52~0.62mm.

4. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: The process parameters of the glaze in step (4) are: the glaze amount is 480-580g / m 2 , specific gravity is 1.82-1.92 g / ml, flow rate is 26-32 seconds; the fineness requirement of the glaze is that the residue on the sieve of 325 mesh reaches 0.5-0.8wt%.

5. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: The grayscale value of the digital glue printing in step (6) is between 20% and 100%, and the thermal decomposition temperature of the digital glue is between 600 and 800°C.

6. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: In the step (7), high calcium boron dry particles are placed on the surface of the blank printed with digital glue, the fan speed is controlled to be 1700-2000 r / min, and the dry particles not on the digital glue layer are sucked away by the fan to form a high calcium boron dry particle layer with a thickness of 2-3 mm, thereby obtaining a blank with high calcium boron dry particles; the particle grading of the high calcium boron dry particles is 86%-90% in the range of 100-200 mesh, 6%-10% in the range of larger than 100 mesh, and less than 5% in the range of smaller than 200 mesh.

7. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: The chemical composition of the high calcium boron dry particles in step (7) is as follows: SiO2: 45% to 50%, Al2O3: 0.5% to 2%, Na2O: 8% to 12%, CaO: 14% to 18%, K2O: 0.05% to 0.1%, B2O3: 21% to 26%, Cs2O: 0.1% to 0.5%, and the sum of the mass percentages of the chemical composition is 100%.

8. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: In the step (8), in order to avoid the problem of uneven local glaze spraying and large deviation in the glaze spraying amount between the two sides and the middle position, the spacing between adjacent spray guns A and spray gun B is 30 cm, and the spacing between adjacent spray guns B and spray gun B is 20 cm. In addition, taking the middle position of the brick blank as the reference line, the six groups of spray guns are 5 cm away from the reference line respectively, and are arranged in sequence one left and one right along the reference line, which can effectively ensure that the glaze spraying amount on both sides of the brick blank is close to that in the middle position; the spray gun nozzle is above the brick blank, at a height of 80 to 90 cm from the surface of the brick blank, the spray gun is inclined at an angle of 45 degrees to the surface of the brick blank, and the gun mouth is tilted backwards; when spraying the antique protective glaze, the pressure of the high-pressure glaze spraying machine is set to 4 to 4.5 MPa.

9. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: The fineness requirement of the antique protective glaze in step (8) is: the residue on the sieve of 325 mesh is 0.4-0.6wt%.

10. The method for preparing a large-grained terrazzo antique tile with a deep glaze and three-dimensional effect according to claim 1, characterized in that: In the step (9), in order to improve the feel of the cloth grain area, the surface of the fired large-grain terrazzo antique tile with a deep glaze three-dimensional effect is lightly brushed by a polishing machine; then lightly brushed with 400 mesh and 600 mesh fiber grinding blocks, and then edged, graded, and packaged for storage.

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