Whole body wear-resistant special granite ceramic tile for public places and preparation method thereof

Abstract

The present invention relates to a wear-resistant, special granite ceramic tile for public spaces and its preparation method. The ceramic tile comprises a polycrystalline wear-resistant base layer and a decorative wear-resistant layer. The polycrystalline wear-resistant base is composed, by weight, of the following raw materials: 8-15% ball clay, 8-15% high-white kaolin, 10-15% mixed mud, 0-5% calcined talc, 3-6% bentonite, 15-25% calcined sodium potassium stone powder, 8-15% finely ground lithium tailings, 4-8% calcined bauxite, 15-25% fine corundum powder, 0-5% ultrafine zirconium silicate, 0-5% high-purity anatase titanium dioxide powder, 0-1% base reinforcement, and 1-3% debonding agent. The polycrystalline base is sintered at high temperature to produce a high-hardness, wear-resistant decorative layer. The product combines the high hardness and good wear resistance of natural granite with excellent physical and chemical properties such as pollution resistance, strength, and radioactivity, perfectly presenting the texture of granite.

Description

Technical Field

[0001] The invention belongs to the technical field of granite ceramic tiles, and in particular relates to a full-body wear-resistant special granite ceramic tile for public places and a preparation method thereof. Background Art

[0002] Granite is an igneous rock, typically formed from volcanic material. It is a hard stone with a dense, hard texture, earning it the nickname "King of Rocks." Granite is incredibly hard, weathering-resistant, and corrosion-resistant, making it a staple building material for outdoor public spaces. However, as a non-renewable resource, granite is becoming increasingly depleted over time. To protect its mineral resources, the government has implemented strict controls on granite mining, a move that has had a significant impact on the outdoor building materials market. Consequently, people are eagerly seeking an alternative to granite. Granite tiles have emerged as a key choice. Combining aesthetic sophistication with practicality and performance, granite tiles are widely used in high-end architectural and decorative projects such as villas, gardens, and residential communities, as well as in high-traffic public spaces like leisure plazas, municipal projects, landscaping, and subway and train stations. Furthermore, they resist the effects of weathering and degradation that can occur with stone materials, thus attracting significant consumer attention.

[0003] Chinese patent CN113716937A discloses a granite-like tile made from household ceramic waste and a method for its preparation. This invention not only provides a method for producing granite-like tiles using household ceramic waste as raw material, but also, through a formula design, improves the utilization rate of the waste and reduces the use of colorants and other mineral raw materials. The process is simple and the production cost is low, facilitating efficient, green, economical, and environmentally friendly recycling of household ceramic waste. While this method can produce granite-like tiles using household ceramic waste, the production process is relatively simple, requiring only a mixture of water and stirring. The resulting product pattern is monotonous and simple, failing to fully capture the rich texture of granite stone. This makes it difficult to meet architectural design requirements and, therefore, hinders widespread application.

[0004] Chinese patent CN117247271A discloses a ceramic tile with imitation granite texture and a preparation process thereof. The imitation granite texture of the invention is obtained by using matte frit, perlite, quartz stone, kaolin, zirconium oxide, magnesium oxide, iron oxide, manganese oxide, titanium oxide and other raw materials in the matte glaze, in combination with a special firing process, so that the fired ceramic tile surface has an off-white base color, and black spots or blocks are distributed on the base color, thereby forming a granite texture and color; although the patent provides a ceramic tile with imitation granite texture and a preparation process thereof, the disadvantage is that the pattern effect of the product produced by this process is relatively monotonous and simple, and it cannot fully restore the rich and colorful texture effect of granite stone, which is subject to greater limitations in practical applications.

[0005] In summary, imitation granite products prepared by using processes such as cloth or granulation mixing generally have the problem of a single texture pattern, and are unable to completely imitate the texture effect of granite stone. So far, the glazed ceramic products produced by decorative printing technologies such as inkjet or silk screen have the best imitation of granite stone texture. The decorative pattern layer of conventional glazed tiles is generally less than 0.1mm, and during use, a layer of transparent glass glaze with a thickness of about 0.2mm needs to be covered on its surface. The hardness of the glass glaze layer is relatively poor, and the decorative layer underneath is easily worn during use, resulting in the loss of surface pattern texture. It can be seen that granite glazed ceramic tiles have a fatal flaw when used in public places. The wear resistance of their glaze surface is insufficient, and most of them can only be used as ordinary floor tiles. Therefore, the existing production technology of imitation granite ceramic tiles needs to be improved and developed. Summary of the Invention

[0006] In view of the shortcomings of the above-mentioned existing technologies, the technical problem to be solved by the present invention is to provide a kind of special granite ceramic tile which is wear-resistant and can be used in public places and is sintered at high temperature using a polycrystalline phase green body formula to generate a high-hardness wear-resistant decorative layer by reaction, so that the product has the high hardness and good wear resistance of natural granite, as well as better physical and chemical properties such as pollution resistance, strength and radioactivity, and can perfectly present the texture effect of granite stone. It is a full-body wear-resistant special granite ceramic tile and its preparation method.

[0007] The technical solution of the present invention is the wear-resistant special granite ceramic tile for public places, which is special in that it includes two parts: a polycrystalline wear-resistant green body layer and a decorative wear-resistant layer. The polycrystalline wear-resistant green body is composed of the following raw material components by weight: 8-15% ball clay, 8-15% high white kaolin, 10-15% mixed mud, 0-5% burned talc, 3-6% bentonite, 15-25% potassium sodium stone powder, 8-15% finely ground lithium tailings, 4%-8% calcined bauxite, 15-25% fine corundum powder, 0-5% ultrafine zirconium silicate, 0-5% high-purity anatase titanium dioxide powder, 0-1% green body reinforcing agent, and 1-3% debonding agent.

[0008] The multi-crystalline wear-resistant blank comprises the following chemical components by weight: Al2O3 30-40wt%, SiO2 45-55wt%, K2O 1-3wt%, Fe2O3 0-2wt%, Na2O 1-3wt%, CaO 0-0.5wt%, MgO 0.5-2.5wt%, and loss on ignition 0-5wt%.

[0009] Preferably, the chemical composition of the finely ground lithium tailings is composed of the following components by weight: 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%, and loss on ignition 0-5wt%; the particle size D50 of the finely ground lithium tailings is between 4μm and 8μm, and the trace elements include rubidium, gallium, strontium, cadmium, and nickel.

[0010] Preferably, the fine corundum powder is α-Al2O3 with an Al2O3 content greater than 99%, an Fe2O3 content less than 0.1%, and a particle size D50 less than 3μm; the ultrafine zirconium silicate has a ZrO2 content greater than 64% and a particle size D50 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 ≥96%, volatile matter at 105° ≤0.5%, a 325 mesh sieve residue less than 0.1%, and a particle size D50 less than 1μm.

[0011] Another technical solution of the present invention is a method for preparing the wear-resistant special granite ceramic tile for public places, which is special in that it includes the following steps:

[0012] (1) 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 future use;

[0013] (2) Preparation of powders of different colors: According to the requirements of the texture pattern design, different ceramic pigments or emulsifiers of set proportions are added to the polycrystalline wear-resistant green body formula slurry in step (1), stirred evenly and sent to a spray drying tower for powdering to obtain colored powders and stored for aging before use;

[0014] (3) Preparation of granular materials of different colors: a portion of the color powder of step (2) is granulated by a granulating device to obtain granular materials of different colors;

[0015] (4) Preparation of mixed powder: the color granular material of step (3) and the color powder of step (2) are mixed evenly according to the designed ratio to obtain a mixed powder for use;

[0016] (5) Whole-body fabrication: The mixed powder in step (4) is arranged in texture according to the design parameters through the whole-body fabrication molding system to obtain a blank layer with a granite texture;

[0017] (6) Compression molding: The blank layer of step (5) is fed into the mold cavity of the molding mechanism for compression to obtain a wear-resistant blank layer;

[0018] ⑺ Drying of the wear-resistant green body layer: sending the formed wear-resistant green body layer into the roller kiln for drying. The strength of the dried porcelain green body is controlled to be 1.5-2.5Mpa;

[0019] (8) Spraying water on the surface of the wear-resistant blank in step (7) to wet it;

[0020] (9) Based on the polycrystalline wear-resistant green body formula of step (1), ceramic colorant, kaolin pigment and raw materials are introduced, and color slurry is obtained through calcination, grinding and spray drying.

[0021] ⑽Use the color slurry of step ⑼ to digitally spray-decorate the wetted blank according to the design pattern to form a decorative wear-resistant layer;

[0022] ⑾ Drying the decorative wear-resistant layer: drying the decorative wear-resistant layer in step ⑽ at a drying temperature of 100 to 200° C. for 3 to 8 minutes;

[0023] ⑿ Kiln firing: The ceramic body of step ⑾ is sent to a roller kiln for firing;

[0024] ⒀ The semi-finished products after firing are polished or not polished and edged, and finally wear-resistant special granite ceramic tiles with polished, natural or special-shaped surfaces are obtained.

[0025] As a preference: in step (1), the processing of the polycrystalline wear-resistant green body formulation adopts a wet ball milling process, and the median diameter D50 of the slurry is controlled to be 8.5 to 10.5 μm;

[0026] Preferably, the color powder in step (2) is composed of the following components by weight: polycrystalline wear-resistant green body formula slurry: 90-100wt%, ceramic colorant: 0-5wt%, emulsifier: 0-10wt%; the color powder is provided with 2-10 different types of colors.

[0027] Preferably, the ceramic pigment in step (2) is composed of the following components by weight: cobalt blue: 0-100wt%, manganese red 0-100wt%, apple green 0-100wt%, chrome green 0-100wt%, orange 0-100wt%, praseodymium yellow 0-100wt%, and cobalt black 0-100wt%.

[0028] Preferably, the opacifying agent is composed of the following components by weight: zirconium dioxide: 0-100wt%, zirconium silicate: 0-100wt%, titanium dioxide: 0-100wt%.

[0029] As a preferred embodiment, the spray drying tower in step (2) adopts a pressure spray drying system, uses a nozzle plate combination with an aperture of 1.5mm to 2.0mm, an atomization pressure of 1.8MPa to 2.6MPa, a drying chamber diameter greater than 10m, a drying output of 10 to 30t / h, and obtains a particle size distribution of the powder: the proportion of particles on the 20-mesh sieve is <6%, the proportion of particles between 20 and 40 meshes is 20 to 25%, the proportion of particles between 40 and 60 meshes is 40 to 45%, the proportion of particles between 60 and 80 meshes is 15 to 20%, and the proportion of particles below 80 meshes is <3%. The specific gravity of the powder is 0.85 to 0.95g / cm 3 , the moisture content is controlled at: 6~8%, and the angle of repose is controlled at 33°~38°.

[0030] Preferably, the granulation equipment in step (3) comprises a discharging device, a scraping device, a pressure roller, a cutter, and a conveyor belt, and is composed of a plurality of discharging devices arranged above the conveyor belt, and a scraping device, a pressure roller, and a cutter respectively arranged behind the discharging device along the running direction of the conveyor belt; the discharging device spreads the color powder in step (2) on the surface of the conveyor belt in multiple layers according to the design parameters, and the powder is scraped and flattened by the scraping device at a fixed height according to the particle thickness requirement, and then pressed into a block by the pressure roller, and finally transported to the cutter to be processed into color granular materials of different colors, sizes, and shapes for storage for standby use; the color granular materials are provided with 1 to 5 kinds, the particle size is controlled to be 3 to 20 mm, the thickness is controlled to be 1 to 10 mm, the flexural strength is controlled to be ≥0.1 MPa, and the density is controlled to be ≥1.0 g / cm 3 ;

[0031] As a preference: in step (4), the mixed powder is provided with 2 to 6 kinds, and is composed of the following components by weight percentage: color powder: 0 to 100 wt%, color granular material: 0 to 100 wt%;

[0032] Preferably, the whole-body fabric forming system described in step (5) comprises a whole-body fabric forming platform, a pressing and forming platform, and a conveying mechanism; the whole-body fabric forming platform comprises a fabric forming mechanism, a transition belt provided at the bottom of the fabric forming mechanism, a transition hopper provided at a position where the transition belt ends below the transition belt, a grid connected to the bottom of the transition hopper, a movable feeding hopper arranged longitudinally above the conveying mechanism on the side of the pressing and forming platform, and a transfer feeding hopper; the fabric forming mechanism is designed in multiple groups and arranged above the whole-body fabric forming platform;

[0033] The material distributing mechanism forms a blank layer after distributing the material according to the designed texture pattern. The blank layer is conveyed to the transition hopper by the transition belt, fixed by the grid and then conveyed to the mold cavity of the pressing and forming platform arranged at the tail end of the whole material distributing platform through the conveying mechanism. The material is fed by the movable feeding hopper and scraped flat, and then pressed and formed to obtain a wear-resistant blank layer.

[0034] The green body layer is formed by a whole-body fabric forming system to form a consistent granite pattern texture from bottom to top, and its thickness can be controlled to be 18mm to 80mm; in step (6), the pressing pressure in the pressing forming is greater than 40MPa, and the thickness of the wear-resistant green body layer is controlled to be 9mm to 40mm; the drying time in step (7) is 50 to 120 minutes; and the residual moisture of the green body after drying is ≤0.5%.

[0035] Preferably, the color slurry in step (9) is composed of the following components by weight: 95-100% base slurry and 0-5% ceramic colorant, which are prepared by weight and ground into slurry using a wet ball milling process; the specific gravity of the color slurry is controlled to be 1.75±0.5g / cm 3 , 40 ° viscosity is 60 ~ 150mpa.s, D50 particle size is controlled to be 10 ~ 15μm; the ceramic colorant is composed of the following components by weight percentage: cobalt blue 0 ~ 100wt%, vanadium zirconium blue 0 ~ 100wt%, brown 0 ~ 100wt%, wrapped red 0 ~ 100wt%, orange 0 ~ 100wt%, wrapped yellow 0 ~ 100wt%, black 0 ~ 100wt%, green 0 ~ 100wt%;

[0036] The basic slurry consists of the following components by weight: 78-90% of light-burned wear-resistant material, 8-20% of kaolin, 0.2-1% of CMC, 0.5-1% of trimer, and 0.2-1% of defoamer.

[0037] Preferably, the formulation of the light-fired wear-resistant material is the same as that of the polycrystalline wear-resistant blank, the difference being the processing method; the light-fired processing method comprises the following steps:

[0038] (1) After the formula is prepared according to the weight percentage, it is ball-milled into slurry according to the wet process;

[0039] (2) Mud moisture is 35-40%, viscosity at 40° is 40-80mPa.s, and D50 particle size is 3-6μm;

[0040] ⑶ Spray-dry the milled slurry to obtain powder, and then put the obtained powder into a sagger made of refractory material, or spread it on a flat plate made of refractory material;

[0041] (4) Firing at a temperature of 1050-1150°C to obtain lightly fired wear-resistant material.

[0042] As a preferred embodiment: the digital spraying process described in step ⑽, which uses digital information to directly control the printing process, can simultaneously realize the printing of 4 to 10 different colors of slurry, and the printing amount per square meter is controlled to be 0 to 1800g;

[0043] Preferably, the decorative wear-resistant layer in step (10) is formed by a CNC spraying process using a variety of different color slurries for decorative printing according to the design pattern texture. The digital spraying pattern is similar to the pattern texture of the wear-resistant base layer, and the pattern is narrowed by 0.2 to 0.4 mm. The thickness of the decorative wear-resistant layer is 0 to 1 mm.

[0044] Preferably, the kiln used in step ⑿ is longer than 300 m, with an inner width greater than 2 m, a firing temperature of 1180-1250° C., and a firing time of 60-120 minutes. The water absorption rate of the product after firing is ≤0.5%, and the Ra value of the product out of the kiln refers to the arithmetic mean deviation of the profile, that is, the surface roughness is between 1.5 and 3 μm.

[0045] As a preferred embodiment, the processing of step (7) includes two situations:

[0046] ⑴ Directly grind the edge of the product after firing in step ⑿;

[0047] ⑵ The product obtained in step ⑿ is first polished and then edged; the polishing is polishing of the wear-resistant surface; polishing process parameters: polishing machine pressure below 0.6Mpa, polishing speed 15-30m / min, polishing abrasive block combination: 10-15 groups of 3000 mesh elastic abrasive blocks, 15-20 groups of 5000 mesh elastic abrasive blocks, 15-25 groups of 6000 mesh elastic abrasive blocks, 5-10 groups of 2000 mesh fiber abrasive blocks, 5-10 groups of 3000 mesh fiber abrasive blocks, polishing cutting amount is less than 0.05mm, and the Ra value of the product after polishing is ≦0.1μm.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] ⑴ In the formula of the polycrystalline wear-resistant green body of the present invention, by introducing fine corundum powder, lithium tailings, ultrafine zirconium silicate and titanium dioxide powder, and coordinating the use of other raw materials, the green body reacts more fully during the sintering process, promoting the formation of a variety of high-hardness wear-resistant crystals including mullite, corundum, zircon, baddeleyite, quartz, cristobalite, rutile, anorthite, cordierite, etc., thereby improving the strength and wear resistance of the ceramic.

[0050] ⑵The present invention provides a whole-body fabric production process and technology. By combining particle preparation, powder mixing, whole-body fabric, digital spraying and other technical processes, the preparation of whole-body wear-resistant special ceramic tiles is completed, the richness of pattern design is expanded, and the product pattern texture is achieved from the inside to the outside. The layered texture is precisely matched with the whole-body decorative effect.

[0051] ⑶ The present invention provides a method for preparing a digital spray decorative wear-resistant layer. The method promotes the growth of wear-resistant crystals by pre-processing the formulated materials by light firing, so that the product reaches or even exceeds the surface hardness and wear resistance of natural granite.

[0052] ⑷ The formula of the present invention introduces a large amount of fine corundum powder, which can increase the aluminum content of the formula and at the same time 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.

[0053] ⑸ The formula of the present invention finely grinds the lithium tailings. In addition to conventional elements such as silicon, aluminum, potassium, and sodium, the 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, while enhancing the reactivity of SiO2 and promoting the growth of quartz crystal phase. The introduction of lithium and the formation of quartz crystals can improve the wear resistance of granite ceramic tiles.

[0054] (6) The formula of the present invention introduces ultrafine zirconium silicate and titanium dioxide powder, which can promote the formation of zircon and rutile crystals. Zircon and rutile crystals are both high-hardness materials and can better improve the wear resistance of the product.

[0055] ⑺The green body formula of the present invention promotes the formation of polycrystalline phases such as mullite, corundum, zircon, baddeleyite, quartz, cristobalite, rutile, anorthite and cordierite by finely grinding lithium tailings, introducing fine corundum powder, ultrafine zirconium silicate and titanium dioxide powder, and coordinating with the use of other raw materials, thereby forming a wear-resistant green body formula with polycrystalline phase components. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 1 is a diagram showing the phase detection results of a ceramic tile prepared by the method of Example 1 of the present invention;

[0057] Figure 2 This is a diagram showing the phase detection results of the ceramic tile prepared by the method of Comparative Example 1;

[0058] Figure 3 This is a diagram showing the phase detection results of the ceramic tile prepared by the method of Comparative Example 2;

[0059] Figure 4 This is the effect diagram of the wear-resistant special granite ceramic of the present invention;

[0060] Figure 5 It is a schematic diagram of the whole body cloth forming system of the present invention.

[0061] Description of main component symbols:

[0062] Whole body fabric platform 1 Fabric mechanism 11 Transition belt 12 Transition hopper 13 Grille 14 Transfer hopper 15 Removable feeding hopper 16 Pressing molding platform 2 Cavity 21 Conveying mechanism 3 DETAILED DESCRIPTION

[0063] The present invention will be further described in detail below with reference to the embodiments:

[0064] Embodiment 1:

[0065] The method for preparing a wear-resistant special granite ceramic tile for public places comprises the following steps:

[0066] (1) 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 future use;

[0067] The polycrystalline wear-resistant green body is composed of the following raw material components by weight: 9.55% ball clay, 10% high white kaolin, 12% mixed mud, 4% burned talc, 4% bentonite, 19% potassium sodium stone powder, 10% finely ground lithium tailings, 5% calcined bauxite, 20% fine corundum powder, 3% ultrafine zirconium silicate, 2% high-purity anatase titanium dioxide powder, 0.35% green body reinforcing agent, and 1.1% debonding agent.

[0068] The polycrystalline wear-resistant blank formulation consists of the following chemical components by weight percentage: Al2O3 37.52wt%, SiO2 49.27wt%, K2O 1.54wt%, Fe2O3 0.66wt%, Na2O 1.65wt%, CaO 0.21wt%, MgO 1.10wt%, TiO2 1.98wt%, ZrO2 1.93wt%, and loss on ignition 4.14wt%;

[0069] The processing of the polycrystalline wear-resistant green body adopts wet ball milling process, and the median diameter D50 of the slurry is 9.7 μm;

[0070] The formula of the fine corundum powder consists of the following chemical components by weight percentage: Al2O399.94% α-Al2O3, Fe2O3 content of 0.06%, and particle size D50 of 1.86μm.

[0071] The chemical composition of the finely ground lithium tailings consists of the following components by weight: Al2O3 17.83wt%, SiO2 69.11wt%, K2O 3.50wt%, Fe2O3 0.87wt%, Na2O 3.45wt%, CaO 0.84wt%, MgO 0.42wt%, Li2O 0.41wt%, trace elements 0.18wt%, and loss on ignition 3.39wt%. The particle size D50 of the finely ground lithium tailings is 5.4μm, and the trace elements include special elements such as rubidium, gallium, strontium, cadmium, and nickel.

[0072] The ultrafine zirconium silicate has a ZrO2 content of 64.8% and a particle size D50 of 0.82 μm;

[0073] The high-purity anatase titanium dioxide powder is TiO2, with an anatase titanium dioxide content of 98.6%, a powder whiteness value of 97.2%, a volatile matter at 105° of 0.3%, a 325 mesh sieve residue of 0.01%, and a particle size D50 of 0.93 μm;

[0074] ⑵ Preparation of powders of different colors: according to the requirements of the texture pattern design, different ceramic pigments or emulsifiers with set ratios are added to the polycrystalline wear-resistant green body formula slurry in step ⑴, stirred evenly and sent to the spray drying tower for powdering to obtain colored powders and stored for aging before use;

[0075] There are eight types of color powder, and the specific settings are as follows:

[0076] The white powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 90wt%, emulsifier: 10wt%;

[0077] The apricot color powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 99.4wt%, manganese red material: 0.3wt%, orange material: 0.3wt%;

[0078] The gray powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 99.7wt%, cobalt black material: 0.2wt%, orange material: 0.1wt%;

[0079] The green color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 99.4wt%, apple green material: 0.5wt%, chrome green material: 0.1wt%;

[0080] The black color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 98.8wt%, cobalt black material: 1.1wt%, manganese red material: 0.1wt%;

[0081] The brown powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 97.3wt%, cobalt black material: 0.4wt%, praseodymium yellow material: 0.7wt%, manganese red material 1.6;

[0082] The yellow powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 98.4wt%, orange material: 0.6wt%, praseodymium yellow material: 1.0wt%;

[0083] The red color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 98.4wt%, manganese red material: 1.3wt%, praseodymium yellow material: 0.3wt%;

[0084] The spray drying tower adopts a pressure spray drying system, uses a nozzle plate with an aperture of 1.8 mm, an atomization pressure of 2.2 MPa, a drying chamber diameter of 12.5 m, and a drying output of 20 t / h. The particle size distribution of the obtained powder is as follows: particles on the 20-mesh sieve account for 2.5%, particles between 20 and 40 meshes account for 23.4%, particles between 40 and 60 meshes account for 41.9%, particles between 60 and 80 meshes account for 17.2%, and particles below 80 mesh account for 0.85%. The specific gravity of the powder is 0.92 g / cm 3 , the moisture content is controlled at 6.5%, and the angle of repose is controlled at 35°;

[0085] ⑶ Preparation of granular materials of different colors, granulating a portion of the color powder of step ⑵ through a granulation device to obtain granular materials of different colors;

[0086] The color particle materials are provided in four types, specifically white particles, black particles, brown particles, and yellow particles;

[0087] The granulation equipment includes a discharging device, a leveling device, a pressure roller, a cutter and a conveyor belt, and is composed of a plurality of discharging devices arranged above the conveyor belt, and a leveling device, a pressure roller and a cutter respectively arranged behind the discharging device along the running direction of the conveyor belt; the discharging device spreads a total of four different color powders of white color powder, black color powder, brown color powder and yellow color powder in step (2) on the surface of the conveyor belt in multiple layers according to design parameters, and the height is determined by the leveling device according to the particle thickness requirement, and after leveling, the pressure roller presses it into blocks, and finally conveys it to the cutter to be processed into color granular materials of different colors, sizes and shapes for storage for future use; the granulation equipment can produce granules with various effects, colors, thicknesses and specifications;

[0088] The color particles have a size of 3 to 10 mm, a thickness of 5 mm, a flexural strength of 0.12 MPa, and a density of 1.61 g / cm 3 :

[0089] (4) Preparation of mixed powder: the color granular material of step (3) and the color powder of step (2) are mixed uniformly according to the designed ratio to obtain a mixed powder for standby use;

[0090] The mixed powder is provided in four types according to the design requirements, including:

[0091] Mixed powder A consists of the following components by weight: white particles: 10wt%, black particles: 5wt%, apricot powder: 30wt%, gray powder: 55wt%;

[0092] Mixed powder B consists of the following components by weight: brown particles: 8wt%, yellow particles: 15wt%, white particles: 5wt%, black powder: 3wt%, gray powder: 69wt%;

[0093] Mixed powder C is composed of the following components by weight: brown particles: 5wt%, yellow particles: 20wt%, white particles: 10wt%, red powder: 15wt%, gray powder: 40wt%, green powder: 10wt%;

[0094] Mixed powder D is composed of the following components by weight: yellow powder: 15wt%, apricot powder: 35wt%, black powder: 3wt%, gray powder: 47wt%;

[0095] (5) Whole-body fabrication: the mixed powder material in step (4) is arranged in texture according to the design parameters through the whole-body fabrication molding system to obtain a blank layer with a granite texture;

[0096] The whole-body fabric forming system includes a whole-body fabric platform 1, a press forming platform 2, and a conveying mechanism 3. The whole-body fabric forming platform is composed of a fabric mechanism 11, a transition belt 12 provided at the bottom of the fabric mechanism 11, a transition hopper 13 provided at a position where the end of the transition belt 12 is lower than the transition belt 12, a grid 14 connected to the bottom of the transition hopper 13, a movable feeding hopper 16 and a transfer feeding hopper 15 arranged longitudinally above the conveying mechanism 3 on the side of the press forming platform 2. The fabric mechanism 11 is designed in multiple groups and is arranged at the top of the whole-body fabric platform 1.

[0097] The material distributing mechanism 11 forms a blank layer after distributing the material according to the designed texture pattern. The blank layer is transferred to the transition hopper 13 by the transition belt 12, fixed by the grid 14, and then sent to the mold cavity 21 of the pressing and forming platform 2 set at the tail end of the whole material distributing platform 1 through the conveying mechanism 3. The material is fed by the movable feeding hopper 16 and scraped flat, and then pressed and formed to obtain a wear-resistant blank layer.

[0098] The blank layer is formed by a whole-body fabric forming system to form a consistent granite pattern texture from bottom to top, and its thickness can be controlled to 80mm;

[0099] (6) Pressing and forming, feeding the blank layer of step (5) into the mold cavity of the forming mechanism for pressing to obtain a wear-resistant blank layer;

[0100] The pressing pressure of the pressing molding is 45MPa, and the thickness of the wear-resistant green body layer is 20mm;

[0101] ⑺ Drying of the wear-resistant green body layer: sending the formed wear-resistant green body layer into a roller kiln for drying. The strength of the dried porcelain green body is controlled to be 2.2Mpa;

[0102] The drying time of the wear-resistant green body layer is 110 minutes; the residual moisture of the green body after drying is 0.42%;

[0103] (8) Spraying water on the surface of the wear-resistant blank in step (7) to wet it;

[0104] (9) Based on the polycrystalline wear-resistant green body formula in step (1), pigments and raw materials such as ceramic colorants and kaolin are introduced, and color slurry is obtained through calcination, grinding, spray drying and other processing techniques;

[0105] The color slurry is ground into slurry using a wet ball milling process, and its specific gravity is 1.75g / cm 3 , 40° viscosity 60mPa.s, D50 particle size controlled to 12μm;

[0106] The color paste is provided in eight types according to the design requirements, specifically including:

[0107] The first color paste is composed of the following components by weight: base paste: 99wt%, cobalt blue colorant: 1wt%;

[0108] The second color slurry is composed of the following components by weight: base slurry: 97wt%, vanadium zirconium blue pigment: 3wt%;

[0109] The third color slurry is composed of the following components by weight percentage: base slurry: 98wt%, brown colorant: 2wt%;

[0110] The fourth color slurry is composed of the following components by weight percentage: base slurry: 98wt%, wrapping red material: 2wt%;

[0111] The fifth color slurry is composed of the following components by weight: base slurry: 97wt%, orange color material: 3wt%;

[0112] The sixth color slurry is composed of the following components by weight percentage: base slurry: 97wt%, wrapping yellow material: 3wt%;

[0113] The seventh color paste is composed of the following components by weight percentage: base paste: 99wt%, black colorant: 1wt%;

[0114] The eighth color slurry is composed of the following components by weight percentage: base slurry: 98wt%, green colorant: 2wt%;

[0115] The base slurry is composed of the following components by weight: 89% of light-burned wear-resistant material, 9.72% of kaolin, 0.32% of CMC, 0.56% of trimer, and 0.4% of defoamer;

[0116] The formula composition of the light-fired wear-resistant material is consistent with the formula of the polycrystalline wear-resistant blank, except that it needs to be light-fired. The light-fired processing method includes the following steps:

[0117] (9.1) After the formula is prepared by weight percentage, it is ball-milled into a slurry using a wet process. The slurry has a moisture content of 36%, a viscosity of 60 mPa.s at 40°C, and a D50 particle size of 4 μm.

[0118] (9.2) The milled slurry is spray-dried to obtain a powder, which is then placed in a sagger made of refractory material or spread on a flat plate made of refractory material and fired at 1080°C to obtain a light-fired wear-resistant material;

[0119] ⑽Use the color slurry of step ⑼ to digitally spray-decorate the wetted blank according to the designed pattern to form a decorative wear-resistant layer;

[0120] The decorative wear-resistant layer is formed by spray-printing eight different colored slurries according to the designed pattern texture using a digital spraying process. The digital spraying process directly controls the printing process using digital information, with a printing volume of 1400g per square meter. The digital spraying pattern is similar to the pattern texture of the wear-resistant base layer, with the pattern narrowed by 0.2mm. The thickness of the decorative wear-resistant layer is 0.8mm.

[0121] ⑾ Drying the decorative wear-resistant layer: drying the decorative wear-resistant layer in step ⑽ at a drying temperature of 150° C. for 8 minutes;

[0122] ⑿ Firing, sending the ceramic body of step ⑾ into a roller kiln for firing;

[0123] The firing process uses a kiln with a length of 380m and an inner width of 2.2m, a firing temperature of 1220°C, and a firing time of 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 1.72μm.

[0124] ⒀The fired semi-finished products are processed in the post-processing process to finally obtain the wear-resistant special granite ceramic tiles;

[0125] The post-processing is specifically to polish the product obtained in step ⑿ first and then grind the edge, and the polishing is polishing of the decorative wear-resistant surface; the polishing process parameters are: polishing machine pressure 0.4Mpa, polishing speed 20m / min, polishing abrasive block combination: 12 groups of 3000 mesh elastic abrasive blocks, 18 groups of 5000 mesh elastic abrasive blocks, 20 groups of 6000 mesh elastic abrasive blocks, 6 groups of 2000 mesh fiber abrasive blocks, 8 groups of 3000 mesh fiber abrasive blocks, polishing cutting amount 0.042mm, and the Ra value of the product after polishing is 0.052μm.

[0126] Comparative Example 1:

[0127] The whole body of the special granite ceramic tile is wear-resistant for public places. The green body formula is composed of the following components by weight percentage (common green body formula): 20% of 35# stone powder, 28% of ultra-white washed mud, 24% of potassium sodium stone powder, 10% of water-abrasive, 3% of superplastic soil, 5% of talc particles, 8.25% of common mud paste, 0.45% of green body reinforcing agent, and 1.3% of degumming agent.

[0128] The difference between Comparative Example 1 and Example 1 is that the polycrystalline wear-resistant green body formula of Example 1 is replaced with a common green body formula. The preparation method of Comparative Example 1 is the same as that of Example 1.

[0129] Specifically, granite ceramic tiles were prepared using the methods of Example 1 and Comparative Example 1, respectively. The obtained ceramic tiles and polished natural granite were tested for wear depth, flexural strength, water absorption, and Mohs hardness of unglazed tiles according to the national standard test method for ceramic tiles or the conventional test method for ceramic tiles. The results are shown in Table 1 below:

[0130] Table 1 Performance comparison of Example 1, Comparative Example 1 and natural granite (polished surface)

[0131]

[0132] The test results of Example 1, Comparative Example 1 and polished natural granite show that when the polycrystalline wear-resistant green body formula of the present invention is replaced with the ordinary green body formula, the wear resistance, Mohs hardness and flexural strength of the prepared ceramic tile will be significantly reduced. Figure 1 and Figure 2 The physical phase detection results show that the use of a polycrystalline wear-resistant green body formula generates more crystal phases than the ordinary green 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 ceramic prepared according to Example 1 is significantly higher than that of Comparative Example 1 and natural granite.

[0133] Comparative Example 2:

[0134] The method for preparing a wear-resistant special granite ceramic tile for public places comprises the following steps:

[0135] (1) 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 send it to the transfer slurry pool for storage and aging after iron removal;

[0136] The polycrystalline wear-resistant green body formula in the step (1) is composed of the following raw material components by weight percentage: ball clay 9.55%, high white kaolin 10%, mixed mud 12%, burned 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 reinforcing agent 0.35%, and debonding agent 1.1%;

[0137] The polycrystalline wear-resistant green body is composed of the following raw material components by weight: 9.55% ball clay, 10% high white kaolin, 12% mixed mud, 4% burned talc, 4% bentonite, 19% potassium sodium stone powder, 10% finely ground lithium tailings, 5% calcined bauxite, 20% fine corundum powder, 3% ultrafine zirconium silicate, 2% high-purity anatase titanium dioxide powder, 0.35% green body reinforcing agent, and 1.1% debonding agent.

[0138] The polycrystalline wear-resistant blank formulation consists of the following chemical components by weight percentage: Al2O3 37.52wt%, SiO2 49.27wt%, K2O 1.54wt%, Fe2O3 0.66wt%, Na2O 1.65wt%, CaO 0.21wt%, MgO 1.10wt%, TiO2 1.98wt%, ZrO2 1.93wt%, and loss on ignition 4.14wt%;

[0139] The processing of the polycrystalline wear-resistant green body adopts wet ball milling process, and the median diameter D50 of the slurry is 9.7 μm;

[0140] The fine corundum powder is α-Al2O3 with an Al2O3 content of 99.94%, a Fe2O3 content of 0.06%, and a particle size D50 of 1.86 μm;

[0141] The chemical composition of the finely ground lithium tailings consists of the following components by weight: Al2O3 17.83wt%, SiO2 69.11wt%, K2O 3.50wt%, Fe2O3 0.87wt%, Na2O 3.45wt%, CaO 0.84wt%, MgO 0.42wt%, Li2O 0.41wt%, trace elements 0.18wt%, and loss on ignition 3.39wt%. The particle size D50 of the finely ground lithium tailings is 5.4μm, and the trace elements include special elements such as rubidium, gallium, strontium, cadmium, and nickel.

[0142] The ultrafine zirconium silicate has a ZrO2 content of 64.8% and a particle size D50 of 0.82 μm;

[0143] The high-purity anatase titanium dioxide powder is TiO2, with an anatase titanium dioxide content of 98.6%, a powder whiteness value of 97.2%, a volatile matter at 105° of 0.3%, a 325 mesh sieve residue of 0.01%, and a particle size D50 of 0.93 μm;

[0144] ⑵ Preparation of different color powders: According to the requirements of texture pattern design, different ceramic pigments or emulsifiers are added in a certain proportion to the polycrystalline wear-resistant green body formula slurry in step ⑴, stirred evenly and sent to a spray drying tower for powdering to obtain color powder and store it for aging before use;

[0145] The spray drying tower adopts a pressure spray drying system, which uses a nozzle plate with an aperture of 1.8 mm, an atomization pressure of 2.2 MPa, a drying chamber diameter of 12.5 m, and a drying output of 20 t / h. The particle size distribution of the obtained powder is as follows: particles on the 20-mesh sieve account for 2.5%, particles between 20 and 40 meshes account for 23.4%, particles between 40 and 60 meshes account for 41.9%, particles between 60 and 80 meshes account for 17.2%, and particles below 80 mesh account for 0.85%. The specific gravity of the powder is 0.92 g / cm 3 , the moisture content is controlled at 6.5%, and the angle of repose is controlled at 35°;

[0146] The color powder is provided in eight kinds, specifically including:

[0147] The white powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 90wt%, emulsifier: 10wt%;

[0148] The apricot color powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 99.4wt%, manganese red material: 0.3wt%, orange material: 0.3wt%;

[0149] The gray powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 99.7wt%, cobalt black material: 0.2wt%, orange material: 0.1wt%;

[0150] The green color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 99.4wt%, apple green material: 0.5wt%, chrome green material: 0.1wt%;

[0151] The black color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 98.8wt%, cobalt black material: 1.1wt%, manganese red material: 0.1wt%;

[0152] The brown powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 97.3wt%, cobalt black material: 0.4wt%, praseodymium yellow material: 0.7wt%, manganese red material 1.6;

[0153] The yellow powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 98.4wt%, orange material: 0.6wt%, praseodymium yellow material: 1.0wt%;

[0154] The red color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 98.4wt%, manganese red material: 1.3wt%, praseodymium yellow material: 0.3wt%;

[0155] The color particle materials are provided in four types, specifically white particles, black particles, brown particles, and yellow particles;

[0156] The granulation equipment includes a discharging device, a leveling device, a pressure roller, a cutter, and a conveyor belt. It is composed of several discharging devices arranged above the conveyor belt, and a leveling device, a pressure roller, and a cutter respectively arranged behind the discharging device along the running direction of the conveyor belt. The discharging device spreads four different color powders, namely white powder, black powder, brown powder, and yellow powder, on the surface of the conveyor belt in multiple layers according to the design parameters. The leveling device determines the height of the powder according to the particle thickness requirements, and then the pressure roller presses it into blocks. Finally, it is conveyed to the cutter to be processed into colored granular materials of different colors, sizes, and shapes for storage. The granulation equipment can produce granules with various effects, colors, thicknesses, and specifications.

[0157] The color granular material has a size of 3 to 10 mm, a thickness of 5 mm, a flexural strength of 0.12 MPa, and a density of 1.61 g / cm 3 :

[0158] ⑶ Preparation of granular materials of different colors, granulating a portion of the color powder of step ⑵ through a granulation device to obtain granular materials of different colors;

[0159] (4) Preparation of mixed powder: the color granular material of step (3) and the color powder of step (2) are mixed uniformly according to the designed ratio to obtain a mixed powder for standby use;

[0160] The mixed powder is provided in four types according to the design requirements, specifically including:

[0161] Mixed powder A consists of the following components by weight: white particles: 10wt%, black particles: 5wt%, apricot powder: 30wt%, gray powder: 55wt%;

[0162] Mixed powder B consists of the following components by weight: brown particles: 8wt%, yellow particles: 15wt%, white particles: 5wt%, black powder: 3wt%, gray powder: 69wt%;

[0163] Mixed powder C is composed of the following components by weight: brown particles: 5wt%, yellow particles: 20wt%, white particles: 10wt%, red powder: 15wt%, gray powder: 40wt%, green powder: 10wt%;

[0164] Mixed powder D is composed of the following components by weight: yellow powder: 15wt%, apricot powder: 35wt%, black powder: 3wt%, gray powder: 47wt%;

[0165] (5) Whole-body fabrication: the mixed powder material in step (4) is arranged in texture according to the design parameters through the whole-body fabrication molding system to obtain a blank layer with a granite texture;

[0166] The whole-body fabric forming system includes a whole-body fabric platform 1, a press forming platform 2, and a conveying mechanism 3. The whole-body fabric forming platform is composed of a fabric mechanism 11, a transition belt 12 provided at the bottom of the fabric mechanism 11, a transition hopper 13 provided at a position where the end of the transition belt 12 is lower than the transition belt 12, a grid 14 connected to the bottom of the transition hopper 13, a movable feeding hopper 16 and a transfer feeding hopper 15 arranged longitudinally above the conveying mechanism 3 on the side of the press forming platform 2. The fabric mechanism 11 is designed in multiple groups and is arranged at the top of the whole-body fabric platform 1.

[0167] The material distributing mechanism 11 forms a blank layer after distributing the material according to the designed texture pattern. The blank layer is transferred to the transition hopper 13 by the transition belt 12, fixed by the grid 14, and then sent to the mold cavity 21 of the pressing and forming platform 2 set at the tail end of the whole material distributing platform 1 through the conveying mechanism 3. The material is fed by the movable feeding hopper 16 and scraped flat, and then pressed and formed to obtain a wear-resistant blank layer.

[0168] The blank layer is formed by a whole-body fabric forming system to form a consistent granite pattern texture from bottom to top, and its thickness can be controlled to 80mm;

[0169] (6) Pressing and forming, feeding the blank layer of step (5) into the mold cavity of the forming mechanism for pressing to obtain a wear-resistant blank layer;

[0170] The pressing pressure of the pressing molding is 45MPa / cm 3 , the wear-resistant green body layer has a thickness of 20 mm;

[0171] ⑺ Drying of the wear-resistant green body layer: sending the formed wear-resistant green body layer into a roller kiln for drying. The strength of the dried porcelain green body is controlled to be 2.2Mpa;

[0172] The wear-resistant green body layer is dried for 110 minutes; the residual moisture of the green body after drying is 0.42%;

[0173] (8) Spraying water on the surface of the wear-resistant blank in step (7) to wet it;

[0174] (9) Based on the polycrystalline wear-resistant green body formula in step (1), pigments and raw materials such as ceramic colorants and kaolin are introduced, and color slurry is obtained through calcination, grinding, spray drying and other processing techniques;

[0175] The color slurry is ground into slurry using a wet ball milling process, and its specific gravity is 1.75g / cm 3 , 40° viscosity 60mPa.s, D50 particle size controlled to 12μm;

[0176] The color paste is provided in eight types according to the design requirements, specifically including:

[0177] The first color paste is composed of the following components by weight: base paste: 99wt%, cobalt blue colorant: 1wt%;

[0178] The second color slurry is composed of the following components by weight: base slurry: 97wt%, vanadium zirconium blue pigment: 3wt%;

[0179] The third color slurry is composed of the following components by weight percentage: base slurry: 98wt%, brown colorant: 2wt%;

[0180] The fourth color slurry is composed of the following components by weight percentage: base slurry: 98wt%, wrapping red material: 2wt%;

[0181] The fifth color slurry is composed of the following components by weight: base slurry: 97wt%, orange color material: 3wt%;

[0182] The sixth color slurry is composed of the following components by weight percentage: base slurry: 97wt%, wrapping yellow material: 3wt%;

[0183] The seventh color paste is composed of the following components by weight percentage: base paste: 99wt%, black colorant: 1wt%;

[0184] The eighth color slurry is composed of the following components by weight percentage: base slurry: 98wt%, green colorant: 2wt%;

[0185] The basic slurry is composed of the following components by weight: 9.72% ball clay, 10% high white kaolin, 12% mixed mud, 4% burned talc, 4% bentonite, 19% potassium sodium stone powder, 10% finely ground lithium tailings, 5% calcined bauxite, 20% fine corundum powder, 3% ultrafine zirconium silicate, 2% high-purity anatase titanium dioxide powder, 0.32% CMC, 0.56% trimer, and 0.4% defoamer. After the formula is prepared by weight percentage, it is ball-milled into the basic slurry according to the wet process, and the moisture content is controlled to 36%, the viscosity at 40° is 60mPa.s, and the D50 particle size is 4μm.

[0186] ⑽Use the color slurry of step ⑼ to digitally spray-decorate the wetted blank according to the designed pattern to form a decorative wear-resistant layer;

[0187] The decorative wear-resistant layer is formed by decorative spray printing of eight different color slurries according to the designed pattern texture using a CNC spraying process. The digital spraying pattern is similar to the pattern texture of the wear-resistant blank layer, and the pattern is narrowed by 0.2mm. The thickness of the decorative wear-resistant layer is 0.8mm.

[0188] The digital spraying process is a process that uses digital information to directly control the printing process, with a printing volume of 1400g per square meter;

[0189] ⑾ Drying the decorative wear-resistant layer: drying the decorative wear-resistant layer in step ⑽ at a drying temperature of 150° C. for 8 minutes;

[0190] ⑿ Firing, sending the ceramic body of step ⑾ into a roller kiln for firing;

[0191] The firing process uses a kiln with a length of 380m and an inner width of 2.2m, a firing temperature of 1220°C, and a firing time of 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 1.72μm.

[0192] ⒀The fired semi-finished products are subjected to post-processing to finally obtain the wear-resistant special granite ceramic tiles.

[0193] The post-processing is specifically to polish the product obtained in step ⑿ first and then grind the edge, and the polishing is polishing of the decorative wear-resistant surface; polishing process parameters: polishing machine pressure 0.4Mpa, polishing speed 20m / min, polishing abrasive block combination: 12 groups of 3000 mesh elastic abrasive blocks, 18 groups of 5000 mesh elastic abrasive blocks, 20 groups of 6000 mesh elastic abrasive blocks, 6 groups of 2000 mesh fiber abrasive blocks, 8 groups of 3000 mesh fiber abrasive blocks, polishing cutting amount 0.042mm, and the Ra value of the product after polishing is 0.052μm.

[0194] The difference between Comparative Example 2 and Example 1 is that the decorative wear-resistant layer formula material is not subjected to light firing processing and is directly prepared and used according to the blank formula.

[0195] Specifically, granite ceramic tiles were prepared by the methods of Example 1 and Comparative Example 2, respectively. The obtained ceramic tiles were tested for wear quality at 12,000 revolutions or for flexural strength, water absorption, and Mohs hardness performance according to the national standard GB / T4100-2015 for ceramic tiles. The results are shown in Table 2 below:

[0196] Table 2 Performance comparison between Example 1 and Comparative Example 2

[0197]

[0198] The test results of Example 1 and Comparative Example 2 show that when the decorative wear-resistant layer formulation of the present invention is not subjected to light firing, the wear resistance, Mohs hardness and flexural strength of the ceramic tile prepared will be reduced. Figure 1 and Figure 3 The results of phase detection show that Figure 1 The types and contents of crystal phases are higher than Figure 3 This is because during the light firing process, various materials in the formula react in the solid phase, generating a portion of wear-resistant crystal phase in advance. At the same time, after calcination, the reaction activity of the formula raw materials is improved, which promotes the formation of crystal phase during the secondary firing, so the wear resistance of the product can be better improved.

[0199] Example 2:

[0200] The method for preparing a wear-resistant special granite ceramic tile for public places comprises the following steps:

[0201] (1) 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 send it to the transfer slurry pool for storage and aging after iron removal;

[0202] The polycrystalline wear-resistant green body is composed of the following raw material components by weight: 9.55% ball clay, 10% high white kaolin, 12% mixed mud, 4% burned talc, 4% bentonite, 19% potassium sodium stone powder, 10% finely ground lithium tailings, 5% calcined bauxite, 20% fine corundum powder, 3% ultrafine zirconium silicate, 2% high-purity anatase titanium dioxide powder, 0.35% green body reinforcing agent, and 1.1% debonding agent.

[0203] The polycrystalline wear-resistant blank formulation consists of the following chemical components by weight percentage: Al2O3 37.52wt%, SiO2 49.27wt%, K2O 1.54wt%, Fe2O3 0.66wt%, Na2O 1.65wt%, CaO 0.21wt%, MgO 1.10wt%, TiO2 1.98wt%, ZrO2 1.93wt%, and loss on ignition 4.14wt%;

[0204] The processing of the polycrystalline wear-resistant green body adopts wet ball milling process, and the median diameter D50 of the slurry is 9.7 μm;

[0205] The fine corundum powder is α-Al2O3 with an Al2O3 content of 99.94%, a Fe2O3 content of 0.06%, and a particle size D50 of 1.86 μm;

[0206] The chemical composition of the finely ground lithium tailings is as follows by weight: Al2O3 17.83wt%, SiO2 69.11wt%, K2O 3.50wt%, Fe2O3 0.87wt%, Na2O 3.45wt%, CaO 0.84wt%, MgO 0.42wt%, Li2O 0.41wt%, trace elements: 0.18wt%, and loss on ignition 3.39wt%. The particle size D50 of the finely ground lithium tailings is 5.4μm, and the trace elements include special elements such as rubidium, gallium, strontium, cadmium, and nickel.

[0207] The ultrafine zirconium silicate has a ZrO2 content of 64.8% and a particle size D50 of 0.82 μm;

[0208] The high-purity anatase titanium dioxide powder is TiO2, with an anatase titanium dioxide content of 98.6%, a powder whiteness value of 97.2%, a volatile matter at 105° of 0.3%, a 325 mesh sieve residue of 0.01%, and a particle size D50 of 0.93 μm;

[0209] ⑵ Preparation of powders of different colors: according to the requirements of the texture pattern design, different ceramic pigments or emulsifiers with set ratios are added to the polycrystalline wear-resistant green body formula slurry in step ⑴, stirred evenly and sent to the spray drying tower for powdering to obtain colored powders and stored for aging before use;

[0210] The spray drying tower adopts a pressure spray drying system, which uses a nozzle plate with an aperture of 1.8 mm, an atomization pressure of 2.2 MPa, a drying chamber diameter of 12.5 m, and a drying output of 20 t / h. The particle size distribution of the obtained powder is as follows: particles on the 20-mesh sieve account for 2.5%, particles between 20 and 40 meshes account for 23.4%, particles between 40 and 60 meshes account for 41.9%, particles between 60 and 80 meshes account for 17.2%, and particles below 80 mesh account for 0.85%. The specific gravity of the powder is 0.92 g / cm 3 , the moisture content is controlled at 6.5%, and the angle of repose is controlled at 35°;

[0211] The color powder is provided in eight kinds, specifically including:

[0212] The white powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 90wt%, emulsifier: 10wt%;

[0213] The apricot color powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 99.4wt%, manganese red material: 0.3wt%, orange material: 0.3wt%;

[0214] The gray powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 99.7wt%, cobalt black material: 0.2wt%, orange material: 0.1wt%;

[0215] The green color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 99.4wt%, apple green material: 0.5wt%, chrome green material: 0.1wt%;

[0216] The black color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 98.8wt%, cobalt black material: 1.1wt%, manganese red material: 0.1wt%;

[0217] The brown powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 97.3wt%, cobalt black material: 0.4wt%, praseodymium yellow material: 0.7wt%, manganese red material 1.6;

[0218] The yellow powder is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 98.4wt%, orange material: 0.6wt%, praseodymium yellow material: 1.0wt%;

[0219] Specifically, the red color powder is composed of the following components by weight percentage: polycrystalline wear-resistant blank formula slurry: 98.4wt%, manganese red material: 1.3wt%, praseodymium yellow material: 0.3wt%;

[0220] The color particle materials are provided in four types, specifically: white particles, black particles, brown particles, and yellow particles;

[0221] The granulation equipment includes a discharging device, a leveling device, a pressure roller, a cutter and a conveyor belt, and is composed of a plurality of discharging devices arranged above the conveyor belt, and a leveling device, a pressure roller and a cutter respectively arranged behind the discharging device along the running direction of the conveyor belt; the discharging device spreads a total of four different color powders of white color material, black powder, brown color powder and yellow color powder in step (2) on the surface of the conveyor belt in multiple layers according to design parameters, and the leveling device is used to determine the height of the powder according to the particle thickness requirement, and then the pressure roller is pressed into a block, and finally the powder is conveyed to the cutter to be processed into color granular materials of different colors, sizes and shapes for storage; the granulation equipment can produce granules with various effects, colors, thicknesses and specifications;

[0222] The color particle material size is 3-10mm, the thickness is 5mm, the flexural strength is 0.12Mpa, and the density is 1.61g / cm 3 :

[0223] ⑶ Preparation of granular materials of different colors, granulating a portion of the color powder of step ⑵ through a granulation device to obtain granular materials of different colors;

[0224] (4) Preparation of mixed powder: the color granular material of step (3) and the color powder of step (2) are mixed uniformly according to the designed ratio to obtain a mixed powder for standby use;

[0225] The mixed powder is provided in four types according to the design requirements, specifically including:

[0226] Mixed powder A is composed of the following components by weight: white particles: 10wt%, black particles: 5wt%, apricot powder: 30wt%, gray powder: 55wt%;

[0227] Mixed powder B consists of the following components by weight: brown particles: 8wt%, yellow particles: 15wt%, white particles: 5wt%, black powder: 3wt%, gray powder: 69wt%;

[0228] Mixed powder C consists of the following components by weight: brown particles: 5wt%, yellow particles: 20wt%, white particles: 10wt%, red powder: 15wt%, gray powder: 40wt%, green powder: 10wt%;

[0229] Mixed powder D is composed of the following components by weight: yellow powder: 15wt%, apricot powder: 35wt%, black powder: 3wt%, gray powder: 47wt%;

[0230] (5) Whole-body fabrication: the mixed powder material in step (4) is arranged in texture according to the design parameters through the whole-body fabrication molding system to obtain a blank layer with a granite texture;

[0231] The whole-body fabric forming system includes a whole-body fabric platform 1, a press forming platform 2, and a conveying mechanism 3. The whole-body fabric forming platform is composed of a fabric mechanism 11, a transition belt 12 provided at the bottom of the fabric mechanism 11, a transition hopper 13 provided at a position where the end of the transition belt 12 is lower than the transition belt 12, a grid 14 connected to the bottom of the transition hopper 13, a movable feeding hopper 16 and a transfer feeding hopper 15 arranged longitudinally above the conveying mechanism 3 on the side of the press forming platform 2. The fabric mechanism 11 is designed in multiple groups and is arranged at the top of the whole-body fabric platform 1.

[0232] The material distributing mechanism 11 forms a blank layer after distributing the material according to the designed texture pattern. The blank layer is transferred to the transition hopper 13 by the transition belt 12, fixed by the grid 14, and then sent to the mold cavity 21 of the pressing and forming platform 2 set at the tail end of the whole material distributing platform 1 through the conveying mechanism 3. The material is fed by the movable feeding hopper 16 and scraped flat, and then pressed and formed to obtain a wear-resistant blank layer.

[0233] The blank layer is formed by the whole body fabric forming system to form a consistent granite pattern texture from bottom to top, and its thickness can be controlled to 80mm

[0234] (6) Pressing and forming, feeding the blank layer of step (5) into the mold cavity of the forming mechanism for pressing to obtain a wear-resistant blank layer;

[0235] The pressing pressure is 45 MPa / cm 3 , the wear-resistant green body layer has a thickness of 20 mm;

[0236] ⑺ Drying of the wear-resistant green body layer: sending the formed wear-resistant green body layer into a roller kiln for drying. The strength of the dried porcelain green body is controlled to be 2.2Mpa;

[0237] The drying time of the wear-resistant green body layer is 110 minutes; the residual moisture of the green body after drying is 0.42%;

[0238] (8) Spraying water on the surface of the wear-resistant blank in step (7) to wet it;

[0239] (9) Based on the polycrystalline wear-resistant green body formula in step (1), pigments and raw materials such as ceramic colorants and kaolin are introduced, and color slurry is obtained through calcination, grinding, spray drying and other processing techniques;

[0240] The color slurry is ground into slurry using a wet ball milling process, and its specific gravity is: 1.75g / cm 3, 40° viscosity: 60mPa.s, D50 particle size controlled to 12μm;

[0241] The color paste is provided in eight types according to the design requirements, specifically including:

[0242] The first color paste is composed of the following components by weight: base paste: 99wt%, cobalt blue colorant: 1wt%;

[0243] The second color slurry is composed of the following components by weight: base slurry: 97wt%, vanadium zirconium blue pigment: 3wt%;

[0244] The third color slurry is composed of the following components by weight percentage: base slurry: 98wt%, brown colorant: 2wt%;

[0245] The fourth color slurry is composed of the following components by weight percentage: base slurry: 98wt%, wrapping red material: 2wt%;

[0246] The fifth color slurry is composed of the following components by weight: base slurry: 97wt%, orange color material: 3wt%;

[0247] The sixth color slurry is composed of the following components by weight percentage: base slurry: 97wt%, wrapping yellow material: 3wt%;

[0248] The seventh color paste is composed of the following components by weight percentage: base paste: 99wt%, black colorant: 1wt%;

[0249] The eighth color slurry is composed of the following components by weight percentage: base slurry: 98wt%, green colorant: 2wt%;

[0250] The base slurry is composed of the following components by weight: 89% of light-burned wear-resistant material, 9.72% of kaolin, 0.32% of CMC, 0.56% of trimer, and 0.4% of defoamer;

[0251] The formula composition of the light-fired wear-resistant material is consistent with the formula of the polycrystalline wear-resistant blank, except that it needs to be light-fired. The light-fired processing method includes the following steps:

[0252] (1) After the formula is prepared according to the weight percentage, it is ball-milled into slurry according to the wet process;

[0253] (2) The slurry has a moisture content of 36%, a viscosity of 60 mPa.s at 40°, and a D50 particle size of 4 μm;

[0254] (3) Spray drying the ball-milled slurry to obtain powder;

[0255] (4) The obtained powder is placed in a sagger made of refractory material, or spread on a flat plate made of refractory material;

[0256] (5) Firing at 1080°C to obtain lightly fired wear-resistant material;

[0257] ⑽Use the color slurry of step ⑼ to digitally spray-decorate the wetted blank according to the designed pattern to form a decorative wear-resistant layer;

[0258] The decorative wear-resistant layer is formed by decorative spray printing of eight different color slurries according to the designed pattern texture using a CNC spraying process. The digital spraying pattern is similar to the pattern texture of the wear-resistant blank layer, and the pattern is narrowed by 0.2mm. The thickness of the decorative wear-resistant layer is 0.8mm.

[0259] The digital spraying process is a process that uses digital information to directly control the printing process, with a printing volume of 1400g per square meter;

[0260] ⑾ Drying the decorative wear-resistant layer: drying the decorative wear-resistant layer in step ⑽ at a drying temperature of 150° C. for 8 minutes;

[0261] ⑿ Firing, sending the ceramic body of step ⑾ into a roller kiln for firing;

[0262] The firing process uses a kiln with a length of 380m and an inner width of 2.2m, a firing temperature of 1220°C, and a firing time of 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 1.72μm.

[0263] ⒀The fired semi-finished products are processed in the post-processing process to finally obtain the wear-resistant special granite ceramic tiles;

[0264] The post-processing is specifically to grind the edges of the product obtained in step ⑿ without polishing.

[0265] Granite ceramic tiles were prepared using the method of Example 2, and the obtained ceramic tiles and natural granite were tested for unglazed tile wear depth, flexural strength, water absorption, and Mohs hardness according to the national standard test method for ceramic tiles or the conventional test method for ceramic tiles. The results are shown in Table 3 below:

[0266] Table 3 Comparison of performance test between Example 2 and natural granite

[0267]

[0268] The test results of Example 2 and natural granite show that the granite ceramic tile prepared by the method of Example 2 has better wear resistance, Mohs hardness, and flexural strength than natural granite. This is because the method of Example 2 is used to prepare granite ceramic tiles, which produce a large number of high-hardness wear-resistant crystals, including mullite, corundum, zircon, quartz, rutile, anorthite, etc. The Mohs hardness of mullite and anorthite reaches 6, rutile is 6 to 6.5, zircon is 7.5 to 8, and corundum is 9. These high-hardness wear-resistant crystals are not only diverse in variety, but also high in content, thereby improving the wear resistance of the product.

[0269] The above descriptions are merely preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. A wear-resistant special granite ceramic tile for public places, characterized in that: The invention comprises a polycrystalline wear-resistant body layer and a decorative wear-resistant layer. The polycrystalline wear-resistant body is composed of the following raw material components by weight: 8-15% ball clay, 8-15% high white kaolin, 10-15% mixed mud, 0-5% burned talc, 3-6% bentonite, 15-25% potassium sodium stone powder, 8-15% finely ground lithium tailings, 4%-8% calcined bauxite, 15-25% fine corundum powder, and 3-5% ultrafine zirconium silicate, wherein the ultrafine zirconium silicate has a D50 less than 1 μm. High-purity anatase titanium dioxide powder 2-5%, green body reinforcement 0-1%, debonding agent 1-3%; The finely ground lithium tailings contain 0.3-1 wt% of Li2O and ≥0.1 wt% of trace elements; The fine corundum powder has an Al2O3 content greater than 99% of α-Al2O3, a Fe2O3 content less than 0.1%, and a D50 less than 3 μm; The high-purity anatase titanium dioxide powder is anatase titanium dioxide powder with a TiO2 content of ≥98% and a D50 of <1 μm; The decorative wear-resistant layer is formed by a whole-body fabric process and digital spraying, and has a thickness of 0 to 1 mm.

2. The wear-resistant special granite ceramic tile for public places according to claim 1, characterized in that: The chemical composition of the finely ground lithium tailings consists of the following components by weight: 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%, and ignition loss 0-5wt%; the particle size D50 of the finely ground lithium tailings is between 4μm and 8μm.

3. The wear-resistant special granite ceramic tile for public places according to claim 1, characterized in that: The ZrO2 content of the ultrafine zirconium silicate is greater than 64%; the high-purity anatase-type titanium dioxide powder has a whiteness value of ≥96%, volatile matter at 105°C is ≤0.5%, the residue on a 325-mesh sieve is less than 0.1%, and the particle size D50 is less than 1 μm.

4. A method for preparing the wear-resistant special granite ceramic tile for public places according to claim 1, characterized in that: The following steps are involved: (1) 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 future use; (2) Preparation of powders of different colors: According to the requirements of the texture pattern design, different ceramic pigments or emulsifiers of set proportions are added to the polycrystalline wear-resistant green body formula slurry in step (1), stirred evenly and sent to a spray drying tower for powdering to obtain colored powders and stored for aging before use; (3) Preparation of granular materials of different colors: a portion of the color powder of step (2) is granulated by a granulating device to obtain granular materials of different colors; (4) Preparation of mixed powder: the color granular material of step (3) and the color powder of step (2) are mixed evenly according to the designed ratio to obtain a mixed powder for use; (5) Whole-body fabrication: The mixed powder in step (4) is arranged in texture according to the design parameters through the whole-body fabrication molding system to obtain a blank layer with a granite texture; (6) Compression molding: The blank layer of step (5) is fed into the mold cavity of the molding mechanism for compression to obtain a wear-resistant blank layer; ⑺ Drying of the wear-resistant green body layer: sending the formed wear-resistant green body layer into the roller kiln for drying. The strength of the dried porcelain green body is controlled to be 1.5-2.5Mpa; (8) Spraying water on the surface of the wear-resistant blank in step (7) to wet it; (9) Based on the polycrystalline wear-resistant green body formula of step (1), ceramic colorant and kaolin are introduced; and color slurry is obtained through calcination, grinding and spray drying. ⑽Use the color slurry of step ⑼ to digitally spray-decorate the wetted blank according to the design pattern to form a decorative wear-resistant layer; ⑾ Drying the decorative wear-resistant layer: drying the decorative wear-resistant layer in step ⑽ at a drying temperature of 100 to 200° C. for 3 to 8 minutes; ⑿ Kiln firing: The ceramic body of step ⑾ is sent to a roller kiln for firing; ⒀ The semi-finished products after firing are polished or not polished and edged, and finally wear-resistant special granite ceramic tiles with polished, natural or special-shaped surfaces are obtained.

5. The method for preparing the wear-resistant special granite ceramic tile for public places according to claim 4, characterized in that: Step (1) The processing of the polycrystalline wear-resistant green body formula adopts a wet ball milling process, and the median diameter D50 of the slurry is controlled to be 8.5-10.5 μm; The granulation equipment described in step (3) includes a discharging device, a leveling device, a pressure roller, a cutter, and a conveyor belt, which is composed of several discharging devices arranged above the conveyor belt, and a leveling device, a pressure roller, and a cutter respectively arranged behind the discharging device along the running direction of the conveyor belt; the discharging device spreads the color powder of step (2) on the surface of the conveyor belt in multiple layers according to the design parameters, and the leveling device is used to level the powder at a certain height according to the particle thickness requirement, and then the pressure roller is pressed into a block, and finally the powder is transported to the cutter to be processed into color granular materials of different colors, sizes, and shapes for storage and standby; the color granular materials are provided with 1 to 5 kinds, the particle size is controlled to be 3 to 20 mm, the thickness is controlled to be 1 to 10 mm, the flexural strength is controlled to be ≥0.1 MPa, and the density is controlled to be ≥1.0 g / cm 3 ; In step (4), the mixed powder is provided with 2 to 6 kinds, and is composed of the following components by weight percentage: color powder: 0 to 100 wt%, color granular material: 0 to 100 wt%; The whole-body fabric forming system described in step (5) comprises a whole-body fabric forming platform, a press forming platform, and a conveying mechanism; the whole-body fabric forming platform comprises a fabric forming mechanism, a transition belt provided at the bottom of the fabric forming mechanism, a transition hopper provided at a position where the transition belt ends below the transition belt, a grid connected to the bottom of the transition hopper, a movable feeding hopper arranged longitudinally above the conveying mechanism on the side of the press forming platform, and a transfer feeding hopper; the fabric forming mechanism is designed in multiple groups and arranged above the whole-body fabric forming platform; The material distributing mechanism forms a blank layer after distributing the material according to the designed texture pattern. The blank layer is conveyed to the transition hopper by the transition belt, fixed by the grid and then conveyed to the mold cavity of the pressing and forming platform arranged at the tail end of the whole material distributing platform through the conveying mechanism. The material is fed by the movable feeding hopper and scraped flat, and then pressed and formed to obtain a wear-resistant blank layer. The blank layer is formed into a granite pattern texture that is consistent from bottom to top by a whole-body fabric forming system, and its thickness is controlled to be 18mm to 80mm; In step (6), the pressing pressure is greater than 40 MPa, and the thickness of the wear-resistant green body layer is controlled to be 9 mm to 40 mm; The drying time in step (7) is 50 to 120 minutes; the residual moisture of the green body after drying is ≤0.5%.

6. The method for preparing the wear-resistant special granite ceramic tile for public places according to claim 4, characterized in that: The spray drying tower described in step (2) adopts a pressure spray drying system, uses a nozzle sheet combination with an aperture of 1.5 mm to 2.0 mm, an atomization pressure of 1.8 MPa to 2.6 MPa, a drying chamber diameter greater than 10 m, and a drying output of 10 to 30 t / h. The particle size distribution of the powder is as follows: the particles on the 20 mesh sieve account for <6%, the particles between 20 mesh and 40 mesh account for 20 to 25%, the particles between 40 mesh and 60 mesh account for 40 to 45%, the particles between 60 mesh and 80 mesh account for 15 to 20%, and the particles below 80 mesh account for <3%. The specific gravity of the powder is 0.85 to 0.95 g / cm 3 , the moisture content is controlled at: 6-8%, and the angle of repose is controlled at 33°-38°; The color powder in step (2) is composed of the following components by weight percentage: polycrystalline wear-resistant green body formula slurry: 90-100wt%, ceramic colorant: 0-5wt%, and emulsifier: 0-10wt%; The color powder is provided with 2 to 10 different types of colors; The ceramic pigment in step (2) is composed of the following components by weight: 0-100wt% of cobalt blue, 0-100wt% of manganese red, 0-100wt% of apple green, 0-100wt% of chrome green, 0-100wt% of orange yellow, 0-100wt% of praseodymium yellow, and 0-100wt% of cobalt black; The opacifying agent consists of the following components by weight percentage: zirconium dioxide: 0-100wt%, zirconium silicate: 0-100wt%, titanium dioxide: 0-100wt%.

7. The method for preparing the wear-resistant special granite ceramic tile for public places according to claim 4, characterized in that: The color slurry in step (9) is composed of the following components by weight: 95-100% base slurry and 0-5% ceramic colorant, which are prepared by weight and ground into slurry using a wet ball milling process; the specific gravity of the color slurry is controlled to be 1.75±0.5g / cm 3 , 40° viscosity is 60~150mPa.s, D50 particle size is controlled at 10~15μm; The ceramic pigment is composed of the following components by weight percentage: cobalt blue: 0-100wt%, vanadium zirconium blue: 0-100wt%, brown: 0-100wt%, package red: 0-100wt%, orange: 0-100wt%, package yellow: 0-100wt%, black: 0-100wt%, green: 0-100wt%; The basic slurry consists of the following components by weight: 78-90% of light-burned wear-resistant material, 8-20% of kaolin, 0.2-1% of CMC, 0.5-1% of trimer, and 0.2-1% of defoamer.

8. The method for preparing the wear-resistant special granite ceramic tile for public places according to claim 7, characterized in that: The formula composition of the light-fired wear-resistant material is the same as that of the polycrystalline wear-resistant blank, except that the processing method adopts a light-fired processing method, which includes the following steps: (1) After the formula is prepared according to the weight percentage, it is ball-milled into slurry according to the wet process; (2) Mud moisture is 35-40%, 40° viscosity is 40-80mPa.s, and D50 particle size is 3-6μm; ⑶ Spray-dry the milled slurry to obtain powder, and then put the obtained powder into a sagger made of refractory material, or spread it on a flat plate made of refractory material; (4) Firing at a temperature of 1050-1150°C to obtain lightly fired wear-resistant material.

9. The method for preparing the wear-resistant special granite ceramic tile for public places according to claim 4, characterized in that: The digital spraying process described in step ⑽ uses digital information to directly control the printing process, and can simultaneously realize the printing of 4 to 10 different color slurries, and the printing amount per square is controlled to be 0 to 1800g; the decorative wear-resistant layer described in step ⑽ adopts the digital spraying process, and adopts a plurality of different color slurries for decorative printing according to the design pattern texture. The digital spraying pattern is similar to the pattern texture of the wear-resistant blank layer, and the pattern is narrowed by 0.2 to 0.4mm. The thickness of the decorative wear-resistant layer is 0 to 1mm; The kiln firing described in step ⑿ is performed in a kiln with a length of more than 300m and an inner width greater than 2m, a firing temperature of 1180-1250°C, a firing time of 60-120 minutes, a water absorption rate of ≤0.5% of the product after firing, and an Ra value of the product out of the kiln, which refers to the arithmetic mean deviation of the profile, that is, the surface roughness is between 1.5 and 3μm.

10. The method for preparing the wear-resistant special granite ceramic tile for public places according to claim 4, characterized in that: The processing of step ⒀ includes two situations: ⑴ Directly grind the edge of the product after firing in step ⑿; ⑵ The product obtained in step ⑿ is first polished and then edged; the polishing is polishing of the wear-resistant surface; polishing process parameters: polishing machine pressure below 0.6Mpa, polishing speed 15-30m / min, polishing abrasive block combination: 10-15 groups of 3000 mesh elastic abrasive blocks, 15-20 groups of 5000 mesh elastic abrasive blocks, 15-25 groups of 6000 mesh elastic abrasive blocks, 5-10 groups of 2000 mesh fiber abrasive blocks, 5-10 groups of 3000 mesh fiber abrasive blocks, polishing cutting amount is less than 0.05mm, and the Ra value of the product after polishing is ≦0.1μm.

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