Wear-resistant granite ceramic tile with three-dimensional decorative effect and its preparation method

Abstract

The present invention relates to a wear-resistant granite ceramic tile with a three-dimensional decorative effect and a preparation method thereof. The polycrystalline wear-resistant green body formula is composed of the following components by weight percentage: ball clay 8% - 15%, high-white kaolin 8% - 15%, mixed mud 10% - 15%, calcined talc 0% - 5%, bentonite 3 - 6%, potassium and sodium feldspar powder 15 - 25%, finely ground lithium tailings 8% - 15%, calcined bauxite 4% - 8%, fine corundum powder 15% - 25%, ultrafine zirconium silicate 0% - 5%, high-purity anatase titanium dioxide powder 0% - 5%, green body strengthening agent 0 - 1%, deflocculant 1 - 3%; the fine corundum powder is α-Al2O3 with an Al2O3 content of 99.9 - 100%, an Fe2O3 content of 0 - 0.1%, and a particle size D50 < 3 μm.

Description

Technical Field

[0001] The present invention belongs to the technical field of granite ceramic tiles, and particularly relates to a wear-resistant granite ceramic tile with a three-dimensional decorative effect and a preparation method thereof. Background Art

[0002] All along, natural stones have been preferred for outdoor decoration. As a natural stone, granite is mainly composed of minerals such as feldspar and quartz, with a Mohs hardness between 6 and 7 degrees. Due to the uniform structure, hard texture, wear resistance, and beautiful appearance of granite, the processed products are dense and sparse, with concave and convex harmony, and can present the natural traces of history in terms of the texture trend and texture quality. Therefore, it is widely used in high-end architectural decoration projects such as villas, gardens, and communities, as well as public places with a large flow of people such as leisure squares, municipal projects, landscaping, subway stations, and railway stations.

[0003] However, as a natural stone directly taken from nature, granite is non-renewable. With the increasing depletion of mineral resources and the improvement of the country's environmental governance efforts, the mining and application of granite have been greatly restricted. In addition, there are certain drawbacks in the application of granite for decoration, such as poor stain resistance, poor weather resistance, low strength, radioactive risk, and impact on the load-bearing capacity of buildings. Therefore, it is necessary to develop a new decorative material to replace natural granite, so that its surface effect is close to that of granite, and its various physical and chemical properties reach or exceed those of natural granite. Summary of the Invention

[0004] The purpose of the present invention is to provide a wear-resistant granite ceramic tile with a three-dimensional decorative effect and a preparation method thereof, which uses a polycrystalline phase green body formula for high-temperature firing to react and generate a high-hardness wear-resistant decorative layer, so that the product has both the properties of high hardness and good wear resistance of natural granite, and also has better physical and chemical properties such as stain resistance, strength, and radioactivity.

[0005] The technical solution of the present invention is that the wear-resistant granite ceramic tile with a three-dimensional decorative effect is characterized in that the polycrystalline phase wear-resistant green body formula is composed of the following components by weight percentage: ball clay 8% - 15%, high-white kaolin 8% - 15%, mixed mud 10% - 15%, calcined talc 0% - 5%, bentonite 3 - 6%, potassium-sodium stone powder 15 - 25%, finely ground lithium tailings 8% - 15%, calcined bauxite 4% - 8%, fine corundum powder 15% - 25%, ultrafine zirconium silicate 0% - 5%, high-purity anatase titanium dioxide powder 0% - 5%, green body strengthening agent 0 - 1%, and deflocculant 1 - 3%; the fine corundum powder is α - Al2O3 with an Al2O3 content of 99.9 - 100% and an Fe2O3 content of 0 - 0.1%, and the particle size D50 < 3μm.

[0006] Preferably, the chemical composition of the finely ground lithium tailings consists of the following components by weight percentage: Al2O3 15-20wt%, SiO2 65-75wt%, K2O 2-5wt%, Fe2O3 0-4wt%, Na2O 2-5wt%, CaO 0-2wt%, MgO 0-1wt%, Li2O 0.3-1wt%, trace elements ≥ 0.1wt%, loss on ignition 0-5wt%; the particle size of the finely ground lithium tailings is D50 between 4μm and 8μm; the trace elements include rubidium, gallium, strontium, cadmium, nickel; the ZrO2 content of the ultrafine zirconium silicate is > 64%, and the particle size D50 < 1μm.

[0007] Preferably, the high-purity anatase titanium dioxide powder is anatase titanium white with TiO2 content > 98%, the whiteness value of the powder ≥ 96%, the volatile matter at 105° ≤ 0.5%, the residue on 325-mesh sieve < 0.1%, and the particle size D50 < 1μm.

[0008] The technical solution of the present invention is a preparation method of the wear-resistant granite ceramic tile with a three-dimensional decorative effect, which is characterized in that it includes the following steps:

[0009] ⑴ Preparation of the polycrystalline phase wear-resistant green body formula slurry: Weigh and ball mill according to the formula to obtain the polycrystalline phase wear-resistant green body formula slurry. After iron removal, it is sent to the transfer slurry tank for storage and aging for later use;

[0010] ⑵ Preparation of different color powders: According to the design requirements of the texture pattern, different color pigments with a set ratio are added to the polycrystalline phase wear-resistant green body formula slurry in step ⑴. After stirring evenly, it is sent to the spray drying tower for powder making to obtain color powders and stored for aging for later use;

[0011] ⑶ Modification of the color powders: A surface modifier is added to the color powders qualified for aging in step ⑵, and the dry mixing process is used to modify the performance of the color powders to obtain modified color powders;

[0012] ⑷ Through-body cloth laying: The prepared different color modified color powders are formed into a three-dimensional decorative green body layer according to the preset pattern through a numerical control cloth laying system;

[0013] ⑸ Compression molding: The green body layer is compression molded to obtain a wear-resistant green body;

[0014] ⑹ Spraying and printing alignment codes: The wear-resistant green body in step ⑸ is sprayed and printed with codes according to the corresponding pattern numbers;

[0015] ⑺ The molded green body is dried, and the surface of the dried green body is wetted by spraying water;

[0016] ⑻ On the basis of the polycrystalline phase wear-resistant green body formula in step ⑴, ceramic pigments, kaolin color slurries, and raw materials are introduced, and after calcination, grinding, and spray drying processes, color slurries are obtained;

[0017] ⑼ Using the color slurry from step ⑻, according to the inkjet code in step ⑹, perform digital inkjet spraying process on the wetted green body according to the same preset pattern as the green body to form a decorative wear-resistant layer;

[0018] ⑽ Apply a base slurry to the bottom of the green body in step ⑼;

[0019] ⑾ Feed the green body coated with the base slurry into a roller hearth kiln for high-temperature firing;

[0020] ⑿ Process the fired product to obtain a wear-resistant granite ceramic tile with a three-dimensional decorative effect.

[0021] Preferably: The different color pigments described in step ⑵ include ceramic pigments of different colors such as blue, red, yellow, black, green, etc.; 3 to 6 different colors are set for the color powder according to design requirements;

[0022] Preferably: The spray drying tower described in step ⑵ adopts a centrifugal spray drying system; the drying chamber diameter of the centrifugal drying system is greater than 5000mm, the drying output is 5 to 10t / h, the rotation speed of the centrifugal atomizer is controlled at 50 to 350r / s, and the particle size distribution of the color powder is obtained: the particles passing through a 30-mesh sieve account for 100%, the particles between 40 and 60 meshes account for 20% - 25%, the particles between 60 and 80 meshes account for 40% - 45%, the particles between 80 and 100 meshes account for 15% - 20%, the particles below 100 meshes account for <3%, and the specific gravity of the color powder is 1.0 - 1.2g / cm 3 , and the angle of repose is 30° - 32°.

[0023] Preferably: The modified color powder described in step ⑶ is composed of the following components by weight percentage: color powder: 97 - 99wt%, surface modifier: 1 - 3wt%; the surface modifier is composed of one or several combinations of calcium stearate, aluminum stearate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid - polyoxyethylene, aminopropyltriethoxysilane, trimethoxysilane, dimethoxysilane, polyphosphate, sodium alkylbenzene sulfonate, etc.;

[0024] Preferably: For the pressing and forming in step ⑸, the pressing pressure > 40MPa / cm 2 , and the thickness of the brick blank is 9mm - 40mm;

[0025] Preferably: For the drying in step ⑺, the time is 50 - 120 minutes; the residual moisture of the dried green body ≤ 0.5%.

[0026] Preferably, the numerically controlled fabricating system described in step (4) is an automatic operation technology directly controlled by digital information, which can simultaneously fabricate 4 to 10 different color powders. Its structure consists of four parts: a central control device, a fabricating device, a transfer storage mechanism, and a transportation mechanism. The central control device is used for presetting, adjusting, and outputting numerically controlled patterns, and controlling the operation of the numerically controlled fabricating system. The fabricating device arranges the blank layer according to the pattern texture preset in the central control device, and several groups can be set according to the thickness requirement of the blank layer. The aperture of the fabricating nozzle is 1 to 5 mm. The transfer storage mechanism is used to store different color powders, and 4 to 10 groups are set according to the fabricating needs. The transportation mechanism is used to connect the transfer storage mechanism and the fabricating device to ensure that the color powders can be accurately and quickly transported to the fabricating device for arranging the blank layer. The three-dimensional decorative blank layer is formed by the numerically controlled fabricating system using numerical control technology to fabricate according to the preset pattern. The fabricating texture forms a consistent pattern texture from the bottom to the top of the blank body layer, and the thickness of the material layer is 18 mm to 80 mm.

[0027] Preferably, the color slurry described in step (8) consists of the following components by weight percentage: basic slurry 95 to 99%, ceramic colorant 1 to 5%. After being prepared according to the weight percentage and stirred evenly, the color slurry is obtained. The specific gravity of the color slurry is 1.75 ± 0.5 g / cm 3 , the viscosity at 40° is 60 to 150 mPa·s, and the D50 particle size is 10 μm to 15 μm. The ceramic colorant consists of one or several colorants among blue, red, yellow, black, and green. The basic slurry consists of the following components by weight percentage: lightly calcined wear-resistant material 78 to 90%, kaolin 8 to 20%, CMC 0.2 to 1%, melamine 0.5 to 1%, defoaming agent 0.2 to 1%. The formulation of the lightly calcined wear-resistant material is the same as that of the polycrystalline wear-resistant blank, except that it needs to be lightly calcined.

[0028] Preferably, the light calcination process is as follows: After the formulation is prepared according to the weight percentage, it is ball-milled into a slurry by a wet process. The water content of the slurry is 35 to 40%, the viscosity at 40° is 40 to 80 mPa·s, and the D50 particle size is 3 to 6 μm. The ball-milled slurry is spray-dried to obtain a powder, and the obtained powder is loaded into a crucible made of refractory material or spread evenly on a flat plate made of refractory material, and fired at a temperature of 1050 to 1150 °C to obtain the lightly calcined wear-resistant material.

[0029] Preferably, the decorative wear-resistant layer described in step (9) is formed by using a numerically controlled spraying process to spray and print with a variety of different color slurries according to a preset pattern texture. The digital spraying pattern is the same as the preset pattern texture of the body's numerical control cloth, and the pattern is narrowed by 0.2 mm to 0.4 mm. The thickness of the decorative wear-resistant layer is 0 mm to 1 mm. The digital spraying process directly controls the spraying by using digital information, and can simultaneously realize the spraying of 4 to 10 different color slurries, and the spraying amount per square meter is controlled to be 0 to 1800 g.

[0030] Preferably, for the high-temperature firing described in step (11), the kiln used has a length of more than 300 m, an inner width greater than 2 m, a firing temperature of 1180 to 1250 °C, a firing time of 60 to 120 minutes, the water absorption rate of the fired product is ≤ 0.5%, and the Ra value of the product out of the kiln. The Ra value refers to the arithmetic mean deviation of the profile, that is, the surface roughness is between 1.5 and 3 μm.

[0031] Preferably, the processing described in step (12) includes two cases:

[0032] (1) Directly grinding the edges of the product after firing in step (11);

[0033] (2) First polishing the product obtained in step (11) and then grinding the edges;

[0034] Among them, the polishing is the polishing of the wear-resistant layer. The polishing process parameters are as follows: the pressure of the polishing machine is below 0.6 Mpa, the polishing speed is 15 to 30 m / min, and the polishing abrasive block combination is: 10 to 15 groups of 3000-mesh elastic abrasive blocks, 15 to 20 groups of 5000-mesh elastic abrasive blocks, 15 to 25 groups of 6000-mesh elastic abrasive blocks, 5 to 10 groups of 2000-mesh fiber abrasive blocks, 5 to 10 groups of 3000-mesh fiber abrasive blocks, the polishing cutting amount is less than 0.05 mm, and the Ra value of the polished product is ≦ 0.1 μm.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] (1) In the polycrystalline phase wear-resistant body formula of the present invention, by introducing fine corundum powder, lithium tailings, ultrafine zirconium silicate and titanium dioxide powder, and cooperating with the use of other raw materials, the reaction during the sintering process of the body is more sufficient, promoting the production of a variety of high-hardness wear-resistant crystals including mullite, corundum, zircon, baddeleyite, quartz, cristobalite, rutile, anorthite, cordierite, etc., and improving the strength and wear resistance of the ceramic.

[0037] ⑵ The digital spraying and decorating method adopted by the present invention can spray with a variety of different color slurries according to the preset pattern textures. The digital spraying pattern is the same as the pattern texture preset by the numerical control cloth laying of the green body. The printing process is directly controlled by digital information, greatly increasing the production convenience, breaking through the drawback that traditional glaze spraying cannot be aligned, expanding the richness of pattern design, and achieving the overall decorative effect of precise matching of the pattern texture from the inside to the outside of the product. At the same time, for the glaze slurry used in digital spraying, when it is prepared, the formula raw materials are lightly burned and then wet ball milled to make wear-resistant glaze slurry. The light burning process promotes the growth of wear-resistant crystals, enabling the product to reach or even exceed the surface hardness and wear resistance of natural granite, meeting the market demand for granite ceramic tiles with higher hardness and wear resistance.

[0038] ⑶ To meet the accuracy requirements of the digital powder spraying process and the decorative pattern effect, the present invention introduces surface modifiers such as calcium stearate and trimethoxysilane in the color powder of digital spraying. Through the hydrophilic groups of the modifiers, physical and chemical interactions can occur with the surface of inorganic powders, adsorbing on the particle surface, making the surface of inorganic powders change from hydrophilic to hydrophobic, thereby improving the surface activity of inorganic powder materials, enhancing the dispersion and flow performance of the powder, avoiding agglomeration or friction during digital powder spraying, which may cause blockage of the nozzle and conveying pipeline, affecting the cloth laying effect and efficiency of digital powder spraying, enriching the product detail display effect, and further broadening the terminal application space of wear-resistant granite ceramic tiles.

[0039] ⑷ A large amount of fine corundum powder is introduced into the formula of the present invention, which can increase the aluminum content of the formula and simultaneously enhance the reaction activity of the green body during the sintering process, thereby promoting the formation of wear-resistant crystals such as mullite, feldspar, and corundum. Introducing ultrafine zirconium silicate and titanium dioxide powder into the formula can promote the formation of zircon and rutile crystals. Zircon and rutile crystals are both substances with high hardness, which can preferably improve the wear resistance of the product.

[0040] ⑸ The present invention finely grinds lithium tailings and introduces them into the green body formula. In addition to containing conventional elements such as silicon, aluminum, potassium, and sodium, lithium tailings also contain special elements such as rubidium, gallium, strontium, cadmium, and nickel and have a high SiO2 content. Fine grinding can promote the fluxing effect of trace elements, simultaneously enhance the reaction activity of SiO2, and promote the growth of quartz crystal phases. The introduction of lithium and the growth of quartz crystals can both improve the wear resistance of granite ceramic tiles. Description of the Drawings

[0041] Figure 1 is the phase detection result diagram of the ceramic tile prepared by the method of Example 1 of the present invention;

[0042] Figure 2 is the phase detection result diagram of the ceramic tile prepared by the method of Comparative Example 1;

[0043] Figure 3It is the phase detection result diagram of the ceramic tile prepared by the method of Comparative Example 2;

[0044] Figure 4 It is the effect diagram of the wear-resistant granite ceramic tile of the present invention. Specific embodiments

[0045] The present invention will be further described in detail below in conjunction with embodiments:

[0046] Example 1:

[0047] A preparation method of a wear-resistant granite ceramic tile with a three-dimensional decorative effect, comprising the following steps:

[0048] ⑴ Preparation of a polycrystalline phase wear-resistant green body formula slurry, proportioning and ball milling according to the formula to obtain a polycrystalline phase wear-resistant green body formula slurry, and after iron removal, it is sent to a transfer slurry tank for storage and aging for later use;

[0049] The polycrystalline phase wear-resistant green body formula is composed of the following components by weight percentage: ball clay 9.55%, high-white kaolin 10%, mixed mud 12%, calcined talc 4%, bentonite 4%, potassium-sodium stone powder 19%, finely ground lithium tailings 10%, calcined bauxite 5%, fine corundum powder 20%, ultrafine zirconium silicate 3%, high-purity anatase titanium dioxide powder 2%, green body enhancer 0.35%, deflocculant 1.1%.

[0050] The fine corundum powder is α-Al2O3 with an Al2O3 content of 99.94% and an Fe2O3 content of 0.06%; the particle size D50 is 1.86 μm;

[0051] The chemical composition of the finely ground lithium tailings is composed of the following by weight percentage: Al2O3 17.83 wt%, SiO2 69.11 wt%, K2O 3.50 wt%, Fe2O3 0.87 wt%, Na2O 3.45 wt%, CaO 0.84 wt%, MgO 0.42 wt%, Li2O 0.41 wt%, trace elements 0.18 wt%, loss on ignition 3.39 wt%. The trace elements include special elements such as rubidium, gallium, strontium, cadmium, nickel, etc.; the particle size D50 is 5.4 μm;

[0052] The ZrO2 content of the ultrafine zirconium silicate is 64.8%, and the particle size D50 is 0.82 μm;

[0053] The high-purity anatase titanium dioxide powder is anatase titanium white with a TiO2 content of 98.6%, the whiteness value of the powder is 97.2%, the volatile matter at 105° is 0.3%, the residue on a 325-mesh sieve is 0.01%, and the particle size D50 is 0.93 μm;

[0054] ⑵ Preparation of colored powders. According to the design requirements of the texture pattern, a certain proportion of different colored pigments is added to the polycrystalline wear-resistant green body formula slurry in step ⑴. After stirring evenly, it is sent to a spray drying tower for powder making to obtain colored powders, which are stored and aged for later use;

[0055] Four types of colored powders are set, specifically including:

[0056] Obtained by spray drying the polycrystalline wear-resistant green body formula slurry in step ⑴ after adding 1% cobalt blue pigment, 2% encapsulated red pigment, 3% orange pigment, and 1% black pigment respectively;

[0057] The spray drying tower adopts a centrifugal spray drying system. The drying chamber diameter of the centrifugal drying system is 7000mm, the drying output is 8t / h, the rotation speed of the centrifugal atomizer is 150r / s, and the particle size distribution of the obtained colored powders is as follows: the proportion of particles passing through a 30-mesh sieve is 100%, the proportion of particles between 40 and 60 meshes is 23%, the proportion of particles between 60 and 80 meshes is 42%, the proportion of particles between 80 and 100 meshes is 17%, the proportion of particles below 100 meshes is 1%, and the specific gravity of the colored powders is 1.1g / cm 3 , and the angle of repose is 30°;

[0058] ⑶ Modification of colored powders. A surface modifier is added to the qualified aged colored powders in step ⑵, and the performance of the colored powders is modified by a dry mixing process to obtain modified colored powders;

[0059] The modified colored powders are composed of the following components by weight percentage: colored powders: 98wt%, surface modifier: 2wt%; the surface modifier is composed of calcium stearate: trimethoxysilane in a ratio of 1:1 by weight percentage;

[0060] ⑷ Through-body cloth laying. The obtained different colored modified colored powders are formed into a three-dimensional decorative green body layer according to a preset pattern through a numerical control cloth laying system;

[0061] The numerical control cloth laying system is an automatic operation technology directly controlled by digital information, and its structure consists of four parts: a central control device, a cloth laying device, a transfer and storage mechanism, and a transportation mechanism;

[0062] The central control device in this embodiment is used for presetting, adjusting, and outputting numerical control patterns, and controlling the operation of the numerical control cloth laying system;

[0063] The cloth laying device in this embodiment arranges the green body layer according to the pattern texture preset by the above central control device. There are a total of three groups, and the aperture of the cloth laying nozzle is 2mm;

[0064] The transfer and storage mechanism in this embodiment has a total of four groups, which are used to store four different colored powders;

[0065] The transport mechanism described in this embodiment is used to connect the transfer storage mechanism and the cloth feeding device, ensuring that the color powder can be accurately and quickly transported to the cloth feeding device for arranging the blank layer;

[0066] The three-dimensional decorative blank layer is formed by the numerical control cloth feeding system using numerical control technology according to a preset pattern. The cloth texture forms a consistent pattern texture from the bottom to the top of the blank layer, and the thickness of the cloth layer is 40 mm;

[0067] ⑸ Pressing and forming to obtain a wear-resistant blank by pressing the blank layer;

[0068] The pressing pressure for the pressing and forming is 45 MPa / cm 2 , and the thickness of the brick blank is 20 mm;

[0069] ⑹ Spraying alignment codes, and spraying and coding the wear-resistant blank in step ⑸ according to the corresponding pattern number;

[0070] ⑺ Drying the formed blank and spraying water on the surface of the dried blank to wet the surface;

[0071] The drying time is 110 minutes; the residual moisture content of the green blank after drying is 0.42%;

[0072] ⑻ On the basis of the polycrystalline phase wear-resistant blank formula in step ⑴, introducing ceramic colorants, pigments and raw materials such as kaolin, and obtaining color slurries through processes such as calcination, grinding, and spray drying;

[0073] Eight kinds of color slurries are provided in this embodiment, specifically:

[0074] Base slurry cobalt blue colorant 99% + 1%, base slurry 97% + 3% vanadium zirconium blue colorant, base slurry 98% + 2% brown colorant, base slurry 998% + 2% encapsulated red colorant, base slurry 97% + 3% orange colorant, base slurry 97% + 3% encapsulated yellow colorant, base slurry 99% + 1% black colorant, base slurry 98% + 2% green colorant. After being prepared according to the weight percentage, use the wet ball milling process to grind into color slurries. The specific gravity of the color slurries is 1.75 g / cm 3 , the viscosity at 40° is 66 mPa·s, and the D50 particle size is 12 μm;

[0075] The base slurry in this embodiment is composed of the following components by weight percentage: lightly burned wear-resistant material 89%, kaolin 9.72%, CMC 0.32%, melamine 0.56%, defoamer 0.4%;

[0076] The formulation composition of the lightly calcined wear-resistant material in this embodiment is the same as that of the polycrystalline wear-resistant green body in step (1), except that it needs to be lightly calcined. For the light calcination process, after formulating the formula according to weight percentage, it is ball-milled into slurry by wet process. The moisture content of the slurry is 36%, the viscosity at 40° is 60 mPa·s, and the D50 particle size is 4 μm. The ball-milled slurry is spray-dried to obtain powder, and the obtained powder is filled into a sagger made of refractory material or spread flat on a flat plate made of refractory material, and fired at a temperature of 1080°C to obtain the lightly calcined wear-resistant material;

[0077] ⑼ Use the color slurry in step (8), and according to the inkjet coding in step (6), perform digital inkjet spraying process on the wetted green body according to the same preset pattern as the green body to form a decorative wear-resistant layer;

[0078] The decorative wear-resistant layer is formed by decorative inkjet printing using a variety of different color slurries according to the preset pattern texture by numerical control inkjet spraying process. The digital inkjet pattern is the same as the preset pattern texture of the digital control cloth laying of the green body, the pattern is narrowed by 0.2 mm, and the thickness of the decorative wear-resistant layer is 0.8 mm;

[0079] The digital inkjet spraying process described in step (9) of this embodiment is a process that directly controls inkjet printing using digital information, and the inkjet printing amount per square meter is 1400 g;

[0080] ⑽ Apply bottom slurry to the bottom of the green body in step (9);

[0081] ⑾ Send the green body coated with bottom slurry into a roller hearth kiln for high-temperature firing;

[0082] For the high-temperature firing, the length of the kiln used is 380 m, the inner width is 2.2 m, the firing temperature is 1220°C, the firing time is 75 minutes, the water absorption rate of the fired product is 0.06%, and the Ra value of the product out of the kiln is 1.72 μm;

[0083] ⑿ Process the fired product to obtain a wear-resistant granite ceramic tile with a three-dimensional decorative effect;

[0084] The processing is specifically to first polish the product obtained in step (11) and then grind the edges. The polishing is the polishing of the decorative wear-resistant layer. Polishing process parameters: the pressure of the polishing machine is 0.4 Mpa, the polishing speed is 20 m / min, the polishing block combination: 12 groups of 3000-mesh elastic polishing blocks, 18 groups of 5000-mesh elastic polishing blocks, 20 groups of 6000-mesh elastic polishing blocks, 6 groups of 2000-mesh fiber polishing blocks, 8 groups of 3000-mesh fiber polishing blocks, the polishing cutting amount is 0.042 mm, and the Ra value of the product after polishing is 0.052 μm.

[0085] Comparative Example 1:

[0086] Wear-resistant granite ceramic tile with three-dimensional decorative effect, the body formula of which consists of the following components by weight percentage (ordinary body formula): 20% of 35# stone powder, 28% of ultra-white washed mud, 24% of potassium-sodium stone powder, 10% of water milled abrasive, 3% of strong plastic clay, 5% of talc particles, 8.25% of ordinary mud paste, 0.45% of body strengthening agent, 1.3% of deflocculant;

[0087] The difference between Comparative Example 1 and Example 1 is that the polycrystalline phase wear-resistant body formula of Example 1 is replaced with an ordinary body formula. The preparation method of Comparative Example 1 is the same as that of Example 1.

[0088] Specifically, the granite ceramic tiles were prepared by the methods of Example 1 and Comparative Example 1 respectively, and the obtained ceramic tiles and polished natural granite were subjected to wear resistance depth, flexural strength, water absorption, and Mohs hardness performance tests according to the national standard test method or conventional test method of ceramic tiles for ceramic tiles. The results are shown in Table 1 below:

[0089] Table 1 Performance comparison of Example 1, Comparative Example 1 and natural granite (polished surface)

[0090]

[0091] From the test results of Example 1, Comparative Example 1 and polished natural granite, it can be seen that when the polycrystalline phase wear-resistant body formula in the present invention is replaced with an ordinary body formula, the wear resistance, Mohs hardness and flexural strength of the prepared ceramic plate will decrease significantly. From Figure 1 and Figure 2 The results of the phase detection of show that: using the polycrystalline phase wear-resistant body formula generates more crystal phases than the ordinary body formula, including mullite, corundum, zircon, baddeleyite, quartz, cristobalite, rutile, anorthite, cordierite and other high-hardness wear-resistant crystals. Not only are there many types of crystal phases, but the content is also high. Therefore, the wear resistance of the granite ceramics prepared according to Example 1 is significantly higher than that of Comparative Example 1 and natural granite.

[0092] Comparative Example 2:

[0093] Preparation method of wear-resistant granite ceramic tile with three-dimensional decorative effect, including the following steps:

[0094] ⑴ Preparation of polycrystalline phase wear-resistant body formula slurry: The raw materials in the body formula are proportioned and ball-milled to obtain polycrystalline phase wear-resistant body formula slurry. After iron removal, it is sent to a transfer slurry tank for storage and aging for later use;

[0095] ⑵ Preparation of different color powders: According to the requirements of texture pattern design, a certain proportion of different color pigments are added to the polycrystalline phase wear-resistant body formula slurry in step ⑴, stirred evenly and then sent to a spray drying tower for powder making to obtain color powders and store them for aging for later use;

[0096] Four kinds of color powder materials are provided, specifically as follows:

[0097] The polycrystalline wear-resistant green body formula slurry in step (1) is respectively added with 1% cobalt blue pigment, 2% encapsulated red pigment, 3% orange pigment, and 1% black pigment, and then spray-dried to obtain;

[0098] The spray drying tower adopts a centrifugal spray drying system. The drying chamber diameter of the centrifugal drying system is 7000 mm, the drying output is 8 t / h, the rotation speed of the centrifugal atomizer is 150 r / s, and the particle size distribution of the obtained color powder material is: the particles passing through a 30-mesh sieve account for 100%, the particles between 40 mesh and 60 mesh account for 23%, the particles between 60 mesh and 80 mesh account for 42%, the particles between 80 mesh and 100 mesh account for 17%, the particles below 100 mesh account for 1%, and the specific gravity of the color powder material is 1.1 g / cm 3 , and the angle of repose is 30°;

[0099] (3) Modification of the color powder material. A surface modifier is added to the color powder material qualified after aging in step (2), and the properties of the color powder material are modified by a dry mixing process to obtain a modified color powder material;

[0100] The modified color powder material is composed of the following components by weight percentage: color powder material: 98 wt%, surface modifier: 2 wt%;

[0101] The surface modifier is composed of calcium stearate: methyltrimethoxysilane in a combination of 1:1 by weight percentage;

[0102] (4) Through-body cloth laying. The obtained different color modified color powder materials are formed into a three-dimensional decorative green body layer according to a preset pattern through a numerical control cloth laying system;

[0103] The numerical control cloth laying system is an automatic operation technology directly controlled by digital information, and its structure is composed of 4 parts: a central control device, a cloth laying device, a transfer storage mechanism, and a transportation mechanism;

[0104] The central control device is used for presetting, adjusting, and outputting numerical control patterns, and controlling the operation of the numerical control cloth laying system;

[0105] The cloth laying device arranges the green body layer according to the pattern texture preset by the above central control device. A total of 3 groups are set, and the aperture of the cloth laying nozzle is 2 mm;

[0106] A total of 4 groups of the transfer storage mechanism are set to store four different color powder materials;

[0107] The transportation mechanism is used to connect the transfer storage mechanism and the cloth laying device to ensure that the color powder material can be accurately and quickly transported to the cloth laying device for green body layer arrangement;

[0108] The three-dimensional decorative blank layer is formed by the numerical control cloth system using numerical control technology according to a preset pattern. The cloth texture forms a consistent pattern texture from the bottom to the top of the blank layer, and the thickness of the cloth layer is 40 mm;

[0109] ⑸Pressing and forming, pressing the blank layer to form a wear-resistant blank;

[0110] The pressing pressure for the pressing and forming is 45 MPa / cm 2 , and the thickness of the brick blank is 20 mm;

[0111] ⑹Spraying alignment codes, spraying and coding the wear-resistant blank in step ⑸ according to the corresponding pattern number;

[0112] ⑺Drying the formed blank, and spraying water on the surface of the dried blank to wet the surface;

[0113] The drying time is 110 minutes; the residual moisture content of the green blank after drying is 0.42%;

[0114] ⑻On the basis of the polycrystalline phase wear-resistant blank formula in step ⑴, introducing ceramic colorants, pigments and raw materials such as kaolin, and obtaining color slurries through processes such as calcination, grinding, and spray drying;

[0115] Eight kinds of color slurries are set in this embodiment, specifically: base slurry 99% + 1% cobalt blue colorant, base slurry 97% + 3% vanadium zirconium blue colorant, base slurry 98% + 2% brown colorant, base slurry 99.8% + 2% encapsulated red colorant, base slurry 97% + 3% orange colorant, base slurry 97% + 3% encapsulated yellow colorant, base slurry 99% + 1% black colorant, base slurry 98% + 2% green colorant. After being prepared according to the weight percentage, use the wet ball milling process to grind into color slurries. The specific gravity of the color slurries is 1.75 g / cm 3 , the viscosity at 40° is 66 mPa·s, and the D50 particle size is 12 μm;

[0116] The base slurry is composed of the following components according to the weight percentage: ball clay 9.72%, high-white kaolin 10%, mixed mud 12%, calcined talc 4%, bentonite 4%, potassium and sodium stone powder 19%, finely ground lithium tailings 10%, calcined bauxite 5%, fine corundum powder 20%, ultrafine zirconium silicate 3%, high-purity anatase titanium dioxide powder 2%, CMC 0.32%, trimer 0.56%, defoaming agent 0.4%. After being prepared according to the weight percentage, grind into a base slurry by the wet process, control the moisture content to 36%, the viscosity at 40° is 60 mPa·s, and the D50 particle size is 4 μm;

[0117] ⑼ Using the color slurry in step ⑻, according to the inkjet code in step ⑹, spray ink the wetted green body onto the preset pattern identical to the green body by digital inkjet process to form a decorative wear-resistant layer;

[0118] The said decorative wear-resistant layer is formed by decorative inkjet printing using a numerical control inkjet process with a variety of different color slurries according to the preset pattern texture. The digital inkjet pattern is the same as the preset pattern texture of the digital control cloth laying of the green body. The pattern is narrowed by 0.2 mm, and the thickness of the said decorative wear-resistant layer is 0.8 mm;

[0119] The said digital inkjet process is a process that directly controls inkjet printing using digital information, and the inkjet amount per square meter is 1400 g;

[0120] ⑽ Apply primer coating to the bottom of the green body in step ⑼;

[0121] ⑾ Feed the green body coated with primer into a roller hearth kiln for high-temperature firing;

[0122] For the said high-temperature firing, the length of the kiln used is 380 m, the inner width is 2.2 m, the firing temperature is 1220 °C, the firing time is 75 minutes, the water absorption rate of the fired product is 0.06%, and the Ra value of the product out of the kiln is 1.72 μm;

[0123] ⑿ Process the fired product to obtain a wear-resistant granite ceramic tile with a three-dimensional decorative effect;

[0124] The said processing specifically means that the product obtained in step ⑾ is first polished and then edged. The polishing is the polishing of the decorative wear-resistant layer. Polishing process parameters: the pressure of the polishing machine is 0.4 Mpa, the polishing speed is 20 m / min, the polishing block combination: 12 groups of 3000-mesh elastic polishing blocks, 18 groups of 5000-mesh elastic polishing blocks, 20 groups of 6000-mesh elastic polishing blocks, 6 groups of 2000-mesh fiber polishing blocks, 8 groups of 3000-mesh fiber polishing blocks, the polishing cutting amount is 0.042 mm, and the Ra value of the product after polishing is 0.052 μm;

[0125] The difference between Comparative Example 2 and Example 1 is that the formulated material of the decorative wear-resistant layer is directly prepared and used according to the green body formula without undergoing light burning processing.

[0126] Specifically, the methods of Example 1 and Comparative Example 2 are respectively used to prepare granite ceramic tiles, and the obtained ceramic tiles are tested for the wear mass at 12000 revolutions or the flexural strength, water absorption rate, and Mohs hardness performance detection by the conventional detection method of ceramic tiles according to the detection method of the national standard for ceramic tiles GB / T4100 - 2015. The results are shown in Table 2 below:

[0127] Table 2 - Performance Comparison between Example 1 and Comparative Example 2

[0128]

[0129] From the test results of Example 1 and Comparative Example 2, it can be seen that when the decorative wear-resistant layer formulation material in the present invention is not subjected to light calcination, the abrasion resistance, Mohs hardness, and flexural strength of the prepared ceramic tiles will all decrease. From Figure 1 and Figure 3 phase detection results, it can be seen that Figure 1 the crystal phase type and content are higher than Figure 3 , because during the light calcination process of the formulation material, various materials undergo solid-phase reactions, and a part of the wear-resistant crystal phase is generated in advance. At the same time, through calcination processing, the reaction activity of the formulation raw materials is improved, promoting the crystal phase formation during the secondary firing. Therefore, the wear-resistant performance of the product can be better improved.

[0130] Example 2:

[0131] ⑴ Preparation of the multi-crystalline phase wear-resistant body formulation slurry: The raw materials in the body formulation are proportioned and ball-milled to obtain the multi-crystalline phase wear-resistant body formulation slurry. After iron removal, it is sent to the transfer slurry tank for storage and aging for later use;

[0132] The multi-crystalline phase wear-resistant body formulation consists of the following components by weight percentage: ball clay 9.55%, high-white kaolin 10%, mixed mud 12%, calcined talc 4%, bentonite 4%, potassium-sodium stone powder 19%, finely ground lithium tailings 10%, calcined bauxite 5%, fine corundum powder 20%, ultrafine zirconium silicate 3%, high-purity anatase titanium dioxide powder 2%, body strengthening agent 0.35%, and deflocculant 1.1%.

[0133] The fine corundum powder is α-Al2O3 with an Al2O3 content of 99.94%, an Fe2O3 content of 0.06%, and a particle size D50 of 1.86 μm.

[0134] The chemical composition of the finely ground lithium tailings consists of the following by weight percentage: Al2O3 17.83 wt%, SiO2 69.11 wt%, K2O 3.50 wt%, Fe2O3 0.87 wt%, Na2O 3.45 wt%, CaO 0.84 wt%, MgO 0.42 wt%, Li2O 0.41 wt%, trace elements 0.18 wt%, and loss on ignition 3.39 wt%. The particle size D50 is 5.4 μm, and the trace elements include special elements such as rubidium, gallium, strontium, cadmium, and nickel;

[0135] The ZrO2 content of the ultrafine zirconium silicate is 64.8%, and the particle size D50 is 0.82 μm;

[0136] The high-purity anatase titanium dioxide powder is anatase titanium white with a TiO2 content of 98.6%, a whiteness value of 97.2% for the powder, a volatile content of 0.3% at 105°, a sieve residue of 0.01% on a 325-mesh sieve, and a particle size D50 of 0.93 μm;

[0137] ⑵ Preparation of different color powders. According to the design requirements of the texture pattern, a certain proportion of different color pigments is added to the polycrystalline wear-resistant green body formula slurry in step ⑴, and after stirring evenly, it is sent to a spray drying tower for powder making to obtain color powders, which are stored and aged for later use;

[0138] Four kinds of color powders are provided, specifically obtained by spray drying the polycrystalline wear-resistant green body formula slurry in step ⑴ after adding 1% cobalt blue pigment, 2% encapsulated red pigment, 3% orange pigment, and 1% black pigment respectively;

[0139] The spray drying tower adopts a centrifugal spray drying system. The drying chamber diameter of the centrifugal drying system is 7000 mm, the drying output is 8 t / h, the rotation speed of the centrifugal atomizer is 150 r / s, and the particle size distribution of the obtained color powder is as follows: the proportion of particles passing through a 30-mesh sieve is 100%, the proportion of particles between 40 and 60 meshes is 23%, the proportion of particles between 60 and 80 meshes is 42%, the proportion of particles between 80 and 100 meshes is 17%, the proportion of particles below 100 meshes is 1%, and the specific gravity of the color powder is 1.1 g / cm 3 , and the angle of repose is 30°.

[0140] ⑶ Modification of color powders. A surface modifier is added to the color powders that have passed the aging test in step ⑵, and the properties of the color powders are modified by a dry mixing process to obtain modified color powders;

[0141] The modified color powder is composed of the following components by weight percentage: color powder: 98 wt%, surface modifier: 2 wt%;

[0142] The surface modifier is composed of calcium stearate and trimethoxysilane in a 1:1 combination by weight percentage;

[0143] ⑷ Through-body cloth laying. The obtained different color modified color powders are formed into a three-dimensional decorative green body layer according to a preset pattern through a numerical control cloth laying system;

[0144] The numerical control cloth laying system is an automatic operation technology directly controlled by digital information, and its structure consists of four parts: a central control device, a cloth laying device, a transfer storage mechanism, and a transportation mechanism.

[0145] The central control device is used for presetting, adjusting, and outputting numerical control patterns, and controlling the operation of the numerical control cloth laying system;

[0146] The described fabricating device arranges the blank layers according to the pattern textures preset by the above-mentioned central control device. There are three groups in total, and the aperture of the fabricating nozzles is 2 mm.

[0147] There are four groups of the transfer and storage mechanisms in total, which are used to store four different color powders.

[0148] The conveying mechanism is used to connect the transfer and storage mechanism and the fabricating device, ensuring that the color powders can be accurately and quickly conveyed to the fabricating device for arranging the blank layers.

[0149] The three-dimensional decorative blank layer is formed by the numerical control fabricating system using numerical control technology according to the preset patterns. The fabricating texture forms a consistent pattern texture from the bottom to the top of the blank body layer, and the thickness of the fabricating layer is 40 mm.

[0150] ⑸ Pressing and forming, pressing the blank layer to obtain a wear-resistant blank body.

[0151] The pressing pressure for the pressing and forming is 45 MPa / cm 2 , and the thickness of the brick blank is 20 mm.

[0152] ⑹ Spraying alignment codes, spraying and coding the wear-resistant blank body in step ⑸ according to the corresponding pattern numbers.

[0153] ⑺ Drying the formed blank body, and spraying water on the surface of the dried blank body to wet the surface.

[0154] The drying time is 110 minutes; the residual moisture content of the dried green body is 0.42%.

[0155] ⑻ Based on the polycrystalline wear-resistant blank body formula in step ⑴, introducing ceramic colorants, kaolin and other pigments and raw materials, and obtaining color slurries through processes such as calcination, grinding, and spray drying.

[0156] There are eight kinds of the described color slurries, specifically: basic slurry 99% + 1% cobalt blue colorant, basic slurry 97% + 3% vanadium zirconium blue colorant, basic slurry 98% + 2% brown colorant, basic slurry 99.8% + 2% encapsulated red colorant, basic slurry 97% + 3% orange colorant, basic slurry 97% + 3% encapsulated yellow colorant, basic slurry 99% + 1% black colorant, basic slurry 98% + 2% green colorant. After being prepared according to the weight percentage, they are ground into color slurries using the wet ball milling process. The specific gravity of the color slurries is 1.75 g / cm 3 , the viscosity at 40° is 66 mPa·s, and the D50 particle size is 12 μm.

[0157] The basic slurry is composed of the following components by weight percentage: lightly calcined wear-resistant material 89%, kaolin 9.72%, CMC 0.32%, melamine 0.56%, defoaming agent 0.4.

[0158] The formulation composition of the lightly burned wear-resistant material is the same as that of the polycrystalline wear-resistant blank in step (1), except that it needs to be lightly burned; for the lightly burning process, after formulating the recipe by weight percentage, it is ball-milled into slurry according to the wet process; the moisture content of the slurry is 36%, the viscosity at 40° is 60 mPa·s, and the D50 particle size is 4 μm. The ball-milled slurry is spray-dried to obtain powder, and the obtained powder is loaded into a sagger made of refractory material or spread evenly on a flat plate made of refractory material, and fired at a temperature of 1080°C to obtain the lightly burned wear-resistant material;

[0159] ⑼ Using the color slurry in step (8), according to the printing code in step (6), the wetted blank is digitally sprayed according to the same preset pattern as the blank to form a decorative wear-resistant layer;

[0160] The decorative wear-resistant layer is formed by decorative spraying with a variety of different color slurries according to the preset pattern texture using the numerically controlled spraying process. The digital spraying pattern is the same as the preset pattern texture of the blank's numerical control cloth laying, the pattern is narrowed by 0.2 mm, and the thickness of the decorative wear-resistant layer is 0.8 mm;

[0161] The digital spraying process is a process that directly controls spraying using digital information, and the spraying amount per square meter is 1400 g;

[0162] ⑽ Apply primer coating to the bottom of the blank in step (9);

[0163] ⑾ Send the blank with primer coating into a roller hearth kiln for high-temperature firing;

[0164] For the high-temperature firing mentioned above, the length of the kiln used is 380 m, the inner width is 2.2 m, the firing temperature is 1220°C, the firing time is 75 minutes, the water absorption rate of the fired product is 0.06%, and the Ra value of the product out of the kiln is 1.72 μm;

[0165] ⑿ Process the fired product to obtain a wear-resistant granite ceramic tile with a three-dimensional decorative effect;

[0166] The processing mentioned above specifically includes: only grinding the edges of the product obtained in step (11) without polishing treatment.

[0167] Prepare granite ceramic tiles by the method of Example 2, and conduct tests on the wear depth, flexural strength, water absorption rate, and Mohs hardness of the obtained ceramic tiles and natural granite according to the national standard test method or the conventional test method of ceramic tiles for unglazed tiles. The results are shown in Table 3 below:

[0168] Table 3 Example 2 and natural granite

[0169]

[0170] From the test results of Example 2 and natural granite, it can be seen that the abrasion resistance, Mohs hardness and flexural strength of the granite ceramic tiles prepared by the method of Example 2 are better than those of natural granite. This is because more high-hardness wear-resistant crystals are produced in the preparation of granite ceramic tiles by the method of Example 2, including mullite, corundum, zircon, quartz, rutile, anorthite, etc. Among them, the Mohs hardness of mullite and anorthite reaches 6, that of rutile is 6-6.5, that of zircon is 7.5-8, and that of corundum is 9. These high-hardness wear-resistant crystals not only have a large variety but also a high content, thus improving the wear resistance of the product.

[0171] The above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A preparation method of wear-resistant granite ceramic tiles with a three-dimensional decorative effect, characterized in that, The polycrystalline wear-resistant blank is composed of the following components by weight percentage: ball clay 8% to 15%, high white kaolin 8% to 15%, mixed mud 10% to 15%, burnt talc 0% to 5%, bentonite 3 to 6%, potassium sodium stone powder 15 to 25%, finely ground lithium tailings 8% to 15%, calcined bauxite 4% to 8%, fine corundum powder 15% to 25%, ultrafine zirconium silicate 0% to 5%, high-purity anatase titanium dioxide powder 0% to 5%, blank reinforcing agent 0 to 1%, and debonding agent 1 to 3%; the fine corundum contains α-Al2O3 99.9 to 100%, Fe2O3 0 to 0.1%, and the particle size D50 is less than 3 μm; The chemical composition of the finely ground lithium tailings is composed of the following components by weight percentage: Al2O3 15-20wt%, SiO2 65-75wt%, K2O 2-5wt%, Fe2O3 0-4wt%, Na2O 2-5wt%, CaO 0-2wt%, MgO 0-1wt%, Li2O 0.3~1wt%, trace elements ≥0.1wt%, ignition loss 0~5wt%; the particle size D50 of the finely ground lithium tailings is between 4μm and 8μm; the trace elements include rubidium, gallium, strontium, cadmium, and nickel; the ZrO2 content of the ultrafine zirconium silicate is greater than 64%, and the particle size D50 is less than 1μm; the high-purity anatase titanium dioxide powder is anatase titanium dioxide with a TiO2 content greater than 98%, a powder whiteness value greater than 96%, volatile matter at 105 degrees Celsius ≤0.5%, a 325 mesh sieve residue less than 0.1%, and a particle size D50 less than 1μm; The preparation method comprises the following steps: ⑴ Preparation of polycrystalline wear-resistant green body formula slurry: ball mill the ingredients according to the formula to obtain polycrystalline wear-resistant green body formula slurry, and after iron removal, send it to the transfer slurry pool for storage and aging for standby use; (2) Preparation of powders of different colors: according to the requirements of the texture pattern design, add different color pigments of set proportions to the polycrystalline wear-resistant blank formula slurry in step (1), stir evenly and send to the spray drying tower for powdering to obtain color powder and store it for aging for later use; ⑶ Modification of color powder: adding a surface modifier to the aged qualified color powder in step ⑵, and modifying the performance of the color powder by a dry mixing process to obtain a modified color powder; (4) Whole-body fabric: The prepared modified color powders of different colors are formed into a three-dimensional decorative blank layer according to a preset pattern through a CNC fabric system; (5) Pressing and forming: Pressing the blank layer into a wear-resistant blank; (6) Printing alignment code: Printing code on the wear-resistant blank of step (5) according to the corresponding pattern number; ⑺Dry the formed green body and spray water on the surface of the dried green body to moisten the surface; ⑻ Based on the multi-crystalline wear-resistant body formula in step ⑴, ceramic colorant and kaolin are introduced, and color slurry is obtained through calcination, grinding and spray drying; (9) Using the color slurry of step (8), according to the printing code of step (9), the wetted blank is sprayed with a digital spraying process in accordance with the same preset pattern as the blank to form a decorative wear-resistant layer; ⑽ The bottom of the green body in step ⑼ is coated with base slurry; ⑾ Feed the green body coated with the base slurry into a roller hearth kiln for high-temperature firing; ⑿ Process the fired product to obtain a wear-resistant granite ceramic tile with a three-dimensional decorative effect.

2. The preparation method of the wear-resistant granite ceramic tile with a three-dimensional decorative effect according to claim 1, characterized in that The different color pigments described in step ⑵ include ceramic pigments of blue, red, yellow, black, and green; 3 to 6 different colors are set for the color powder according to design requirements; the spray drying tower described in step ⑵ uses a centrifugal spray drying system; the drying chamber of the centrifugal drying system has a diameter greater than 5000 mm, a drying output of 5 to 10 t / h, and the rotational speed of the centrifugal atomizer is controlled at 50 to 350 r / s to obtain the particle size distribution of the color powder: the proportion of particles passing through a 30-mesh sieve is 100%, the proportion of particles between 40 and 60 meshes is 20% to 25%, the proportion of particles between 60 and 80 meshes is 40% to 45%, the proportion of particles between 80 and 100 meshes is 15% to 20%, the proportion of particles below 100 meshes is <3%, the specific gravity of the color powder is 1.0 to 1.2 g / cm³, and the angle of repose is 30° to 32°.

3. The preparation method of the wear-resistant granite ceramic tile with a three-dimensional decorative effect according to claim 1, characterized in that, The modified color powder material described in step (3) is composed of the following components by weight percentage: color powder material: 97-99 wt%, surface modifier: 1-3 wt%; the pressing and forming described in step (5), the pressing pressure > 40 MPa / cm 2 , the thickness of the brick blank is 9 mm to 40 mm; The drying described in step ⑺ takes 50 to 120 minutes; the residual moisture of the green body after drying is ≤0.5%.

4. The preparation method of the wear-resistant granite ceramic tile with a three-dimensional decorative effect according to claim 1, characterized in that The numerical control feeding system described in step ⑷ is an automatic operation technology directly controlled by digital information, which can simultaneously achieve the feeding of 4 to 10 different color powders. Its structure consists of four parts: a central control device, a feeding device, a transfer storage mechanism, and a transportation mechanism; the central control device is used for the presetting, adjustment, and output of numerical control patterns, and controls the operation of the numerical control feeding system; the feeding device arranges the green body layer according to the pattern texture preset in the central control device, and several groups can be set according to the thickness requirement of the green body layer. The aperture of the feeding nozzle is 1 to 5 mm; the transfer storage mechanism is used to store different color powders, and 4 to 10 groups are set according to the feeding needs; the transportation mechanism is used to connect the transfer storage mechanism and the feeding device to ensure that the color powder can be accurately and quickly transported to the feeding device for the arrangement of the green body layer; the three-dimensional decorative green body layer is formed by the numerical control feeding system using numerical control technology to feed according to the preset pattern. The feeding texture forms a consistent pattern texture from the bottom to the top of the green body layer, and the thickness of the material layer is 18 mm to 80 mm.

5. The preparation method of the wear-resistant granite ceramic tile with a three-dimensional decorative effect according to claim 1, characterized in that, The decorative wear-resistant layer described in step ⑼ is formed by using a numerical control spraying process to spray and print with a variety of different color slurries according to the preset pattern texture. The digital spraying pattern is the same as the pattern texture preset by the numerical control feeding of the green body, and the pattern is narrowed by 0.2 mm to 0.4 mm. The thickness of the decorative wear-resistant layer is 0 mm to 1 mm; the digital spraying process directly controls the spraying by using digital information, and can simultaneously achieve the spraying of 4 to 10 different color slurries. The spraying amount per square meter is controlled at 0 to 1800 g.

6. The preparation method of the wear-resistant granite ceramic tile with a three-dimensional decorative effect according to claim 1, characterized in that, For the high-temperature firing described in step ⑾, the kiln used has a length of more than 300 m, an inner width greater than 2 m, a firing temperature of 1180 to 1250 °C, a firing time of 60 to 120 minutes, the water absorption rate of the fired product is ≤0.5%, and the Ra value of the product out of the kiln. The Ra value refers to the arithmetic mean deviation of the profile, that is, the surface roughness is between 1.5 and 3 μm.

7. The preparation method of the wear-resistant granite ceramic tile with a three-dimensional decorative effect according to claim 1, characterized in that, The processing described in step ⑿ includes two cases: ⑴ Directly grinding the edges of the product after firing in step ⑾; ⑵ First polishing the product obtained in step ⑾ and then grinding the edges; Among them, the polishing is the polishing of the wear-resistant layer; the polishing process parameters are as follows: the pressure of the polishing machine is below 0.6 Mpa, the polishing speed is 15 - 30 m / min, the combination of polishing blocks is: 10 - 15 groups of 3000-mesh elastic polishing blocks, 15 - 20 groups of 5000-mesh elastic polishing blocks, 15 - 25 groups of 6000-mesh elastic polishing blocks, 5 - 10 groups of 2000-mesh fiber polishing blocks, 5 - 10 groups of 3000-mesh fiber polishing blocks, the polishing cutting amount is less than 0.05 mm, and the Ra value of the product after polishing is ≤ 0.1 μm.

Images