Dry granular glaze with strong stereoscopic impression, ceramic large plate and preparation method of dry granular glaze

Abstract

The invention belongs to the technical field of dry granular glaze manufacturing, and particularly relates to a dry granular glaze with strong stereoscopic impression, a ceramic large plate and a preparation method of the dry granular glaze. The dry granular glaze with strong stereoscopic impression belongs to calcium-zinc glaze, and by improving the components of the dry granular glaze, high-content zinc oxide can partially replace calcium ions and magnesium ions, so that the dry granular glaze with strong stereoscopic impression is prepared. According to the present invention, the surface of the ceramic large plate is subjected to a reaction with the silicon dioxide to form the stable network, such that the wear resistance of the surface of the ceramic large plate is improved, the crystallization effect can be retarded, and the precipitation of the zinc-aluminum spinel and other microcrystals can be promoted so as to improve the texture level of the bright face brick, such that the tone is clearer, and the transparency is good; according to the present invention, the fine texture and the crystal texture of the natural stone material can be well restored, the pattern has characteristics of strong three-dimensional effect, good permeability, excellent antifouling property, simple preparation process, and suitableness for the preparation of the large-size ceramic plate.

Description

Technical Field

[0001] This invention belongs to the field of dry granule glaze manufacturing technology, specifically relating to a dry granule glaze with strong three-dimensional effect, a ceramic slab, and its preparation method. Background Technology

[0002] In recent years, large-format ceramic slabs have expanded beyond the construction sector, finding wider application in furniture such as wardrobe panels, cabinet panels, and door panels. As people pursue higher quality of life and more aesthetically pleasing spaces, the colors and textures of large-format ceramic slabs require continuous research and development to enhance their visual impact, increase product differentiation, and improve market competitiveness. Ceramic slabs treated with dry-granule glaze have a high surface hardness, effectively resisting wear and scratches from daily use and extending their lifespan.

[0003] Chinese invention patent CN115215548B discloses a dry-granule glaze for ceramic tiles and its preparation method, as well as ceramic tiles and their preparation method. The dry-granule glaze for ceramic tiles comprises the following components by weight percentage: silicon 37%-45%, aluminum 14%-19%, potassium 0.5%-3%, sodium 0.5%-3%, calcium 5%-10%, magnesium 0.5%-1.5%, barium 14%-20%, zinc 8%-13%, and lithium 0.5%-1.2%. The dry-granule glaze for ceramic tiles of this invention produces ceramic tiles with a soft luster, a delicate and smooth feel, and a unique leather-like texture in both visual and tactile senses. It is also less prone to breakage, ensuring the longevity of the tiles. However, existing technologies lack further improvements to the composition of the dry-granule glaze, failing to achieve a stable three-dimensional decorative effect while maintaining excellent wear resistance of the glaze surface. Summary of the Invention

[0004] The purpose of this invention is to provide a dry granule glaze with a strong three-dimensional effect, a ceramic slab, and a method for preparing the same, in order to solve the technical problem in the prior art that the composition of the dry granule glaze has not been further improved, so as to achieve a stable three-dimensional decorative effect while ensuring the excellent wear resistance of the glaze surface.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The elemental composition of a three-dimensional dry granule glaze is as follows: silicon dioxide 57-60%, aluminum oxide 7-9%, calcium oxide 11-13%, potassium oxide 5-7%, sodium oxide 0.5-1%, magnesium oxide 0.5-1%, zinc oxide 9-10%, titanium dioxide 0.2-0.4%, and iron oxide 0.6-0.8%, with the remainder being loss on ignition. A type of dry granule glaze with strong three-dimensional effect is composed of the following components in parts by weight: 0.5-2 parts kaolin, 25-35 parts quartz, 15-20 parts calcite, 3-5 parts dolomite, 30-40 parts potassium feldspar, 6-8 parts sodium feldspar, 9-10 parts zinc oxide, 0.2-0.5 parts rutile and 0.6-1 parts iron oxide red.

[0006] The pass rate of the dry granule glaze through a 120-160 mesh sieve is 80-90%.

[0007] A method for preparing a dry granular glaze with strong three-dimensional effect includes the following steps: S11. Mix and grind the raw materials to obtain a mixture, add it to a furnace for melting, immediately add it to cold water for quenching after melting, and dry it to obtain a mixture. S12. Add the mixture to a ball mill, ball mill and sieve to obtain a dry granule glaze with a strong three-dimensional effect.

[0008] Preferably, the ambient temperature range for melting in S11 is 1140~1190℃, the melting time is 1~2h, and the material is dried at 100~150℃.

[0009] Preferably, ball milling is performed in S12 for 4-6 hours.

[0010] A ceramic slab, from bottom to top, comprises a body layer, a base glaze layer, a color and pattern layer, a base protective glaze, a dry granule layer, and a surface protective glaze, wherein the dry granule layer is fired from the dry granule glaze as described above.

[0011] The thickness of the body layer is 8~12mm, the thickness of the base glaze layer is 0.3~0.5mm, the thickness of the color pattern layer is 0.1~0.3mm, the thickness of the base protective glaze is 0.1~0.2mm, the thickness of the dry granule layer is 0.5~1.2mm, and the thickness of the surface protective glaze is 0.3~0.5mm.

[0012] The composition of the blank layer is 60-70% silicon dioxide, 18-22% aluminum oxide, 2-4% calcium oxide, 0.1-0.3% iron oxide, 1-3% potassium oxide, 2-4.5% sodium oxide, 0.5-1.5% magnesium oxide, and the remainder being impurities.

[0013] The composition of the base glaze layer is 57-63% silicon dioxide, 20-25% aluminum oxide, 3-5% calcium oxide, 0.1-0.3% iron oxide, 1-3% potassium oxide, 2-4.5% sodium oxide, 0.5-0.8% magnesium oxide, 0.5-2% zinc oxide and 0.2-0.5% titanium dioxide, with the remainder being impurities.

[0014] The method for preparing the ceramic slab includes the following steps: S1. Roll-press the billet into shape and dry it to obtain a billet layer; S2. Apply a base glaze to the body layer and inkjet print color patterns to obtain the ceramic slab substrate. S3. Spray the base protective glaze onto the surface of the ceramic slab substrate. Apply the three-dimensional dry granule glaze to the surface of the ceramic slab substrate using a dry granulator. Spray the top protective glaze, fire, and polish to obtain the ceramic slab.

[0015] Preferably, the S1 is dried at 80~100℃.

[0016] Preferably, the amount of base glaze applied in S2 is 200~300g / m². 3 .

[0017] Preferably, the dry granule glaze application rate in S3 is 350~450g / m³. 3 The application rate of the protective glaze on the base is 150~200g / m². 3 The surface protective glaze application rate is 200~280g / m². 3 The firing temperature is 1100~1250℃ and the firing time is 40~60min.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The three-dimensional dry granule glaze of this invention belongs to calcium-zinc glaze. By improving the composition of the dry granule glaze, the high content of zinc oxide can partially replace calcium and magnesium ions, react with silicon dioxide to form a more stable network, improve the wear resistance of the ceramic slab surface, and slow down the crystallization effect, promote the precipitation of microcrystals such as zinc aluminum spinel. During the melting and cooling process of the dry granule glaze, iron and titanium elements will first precipitate in the form of ilmenite microcrystals, which will form a metallic luster by reflecting on the glaze surface, thereby improving the texture of the glossy tile, making the color clearer and the transparency better.

[0019] 2. This invention prepares large ceramic slabs using a dry granulation process, resulting in a richer glaze layer that better reproduces the fine texture and crystalline quality of natural stone. The patterns have a strong three-dimensional effect, better transparency, and excellent stain resistance. The preparation process is simple and suitable for the preparation of large-format ceramic slabs. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The composition of the blank layer involved in this invention is 64% silicon dioxide, 21% aluminum oxide, 3% calcium oxide, 0.2% iron oxide, 2.5% potassium oxide, 4.5% sodium oxide and 1.1% magnesium oxide, with the remainder being impurities.

[0022] The base glaze consists of 60% silicon dioxide, 25% aluminum oxide, 4% calcium oxide, 0.1% iron oxide, 1% potassium oxide, 3% sodium oxide, 0.7% magnesium oxide, 1.5% zinc oxide, and 0.4% titanium dioxide, with the remainder being impurities.

[0023] Example 1: The elemental composition of a three-dimensional dry granule glaze in this example is as follows: 57.7% silicon dioxide, 7.4% aluminum oxide, 12.5% ​​calcium oxide, 5.3% potassium oxide, 0.7% sodium oxide, 0.8% magnesium oxide, 9.6% zinc oxide, 0.2% titanium dioxide, and 0.6% iron oxide, with the remainder being loss on ignition. A type of dry granule glaze with strong three-dimensional effect is composed of the following components: 0.5 kg of kaolin, 32.7 kg of quartz, 19.6 kg of calcite, 3.6 kg of dolomite, 31.3 kg of potassium feldspar, 6.1 kg of sodium feldspar, 9.6 kg of zinc oxide, 0.2 kg of rutile and 0.7 kg of iron oxide red.

[0024] This embodiment describes a method for preparing a dry granular glaze with a strong three-dimensional effect, comprising the following steps: S11. Mix and grind the raw materials of dry granule glaze to obtain a mixture, add it to a furnace for melting, the melting temperature range is 1190℃, the melting time is 1.5h, immediately add it to cold water for water quenching after melting, and dry it at 120℃ to obtain a mixture. S12. The mixture is added to a ball mill and milled for 4 hours. The passing rate of the 120-mesh sieve is 80%, and a dry granule glaze with a strong three-dimensional effect is obtained.

[0025] The ceramic slab of this embodiment includes, from bottom to top, a body layer, a base glaze layer, a color and pattern layer, a base protective glaze, a dry granule layer, and a surface protective glaze. The dry granule layer is fired from the dry granule glaze as described above.

[0026] The body layer has a thickness of 10 mm, the base glaze layer has a thickness of 0.3 mm, the color pattern layer has a thickness of 0.15 mm, the base protective glaze has a thickness of 0.1 mm, the dry granule layer has a thickness of 0.6 mm, and the surface protective glaze has a thickness of 0.3 mm.

[0027] The method for preparing the ceramic slab in this embodiment includes the following steps: S1. Roll-press the billet into shape and dry it at 80~100℃ to obtain the billet layer; S2. Apply a base glaze to the body layer, with a base glaze application rate of 200g / m². 3Inkjet printing of colors and patterns is used to create ceramic slab substrates; S3. Spray the base protective glaze onto the surface of the ceramic slab substrate. Using a dry granulator, apply the three-dimensional dry granule glaze to the ceramic slab substrate surface, followed by the spraying of the top protective glaze. The dry granule glaze application rate is 400g / m². 3 The base protective glaze application rate is 150g / m². 3 The surface protective glaze application rate is 220g / m². 3 The ceramic slabs are fired at 1150℃ for 50 minutes and then polished to obtain large ceramic slabs.

[0028] Example 2: The elemental composition of a three-dimensional dry granule glaze in this example is as follows: 58.4% silicon dioxide, 8.5% aluminum oxide, 11.4% calcium oxide, 6.8% potassium oxide, 0.9% sodium oxide, 0.6% magnesium oxide, 9.0% zinc oxide, 0.2% titanium dioxide, and 0.8% iron oxide, with the remainder being loss on ignition. A type of dry granule glaze with strong three-dimensional effect is composed of the following components: 0.7 kg of kaolin, 26.5 kg of quartz, 18.5 kg of calcite, 3.7 kg of dolomite, 40 kg of potassium feldspar, 7.5 kg of sodium feldspar, 9.2 kg of zinc oxide, 0.3 kg of rutile and 0.9 kg of iron oxide red.

[0029] This embodiment describes a method for preparing a dry granular glaze with a strong three-dimensional effect, comprising the following steps: S11. Mix and grind the raw materials of dry granule glaze to obtain a mixture, add it to a furnace for melting, the melting temperature range is 1150℃, the melting time is 2h, immediately add it to cold water for water quenching after melting, and dry it at 100℃ to obtain a mixture. S12. The mixture is added to a ball mill and milled for 4 hours. The passing rate of the 120-mesh sieve is 85%, and a dry granule glaze with a strong three-dimensional effect is obtained.

[0030] The ceramic slab of this embodiment includes, from bottom to top, a body layer, a base glaze layer, a color and pattern layer, a base protective glaze, a dry granule layer, and a surface protective glaze. The dry granule layer is fired from the dry granule glaze as described above.

[0031] The body layer has a thickness of 9 mm, the base glaze layer has a thickness of 0.4 mm, the color pattern layer has a thickness of 0.15 mm, the base protective glaze has a thickness of 0.16 mm, the dry granule layer has a thickness of 0.8 mm, and the surface protective glaze has a thickness of 0.37 mm.

[0032] The method for preparing the ceramic slab in this embodiment includes the following steps: S1. Roll-press the billet into shape and dry it at 80°C to obtain a billet layer; S2. Apply a base glaze to the body layer, with a base glaze application rate of 240g / m². 3Inkjet printing of colors and patterns is used to create ceramic slab substrates; S3. Spray the base protective glaze onto the surface of the ceramic slab substrate. Using a dry granulator, apply the three-dimensional dry granule glaze to the ceramic slab substrate surface, followed by the spraying of the top protective glaze. The dry granule glaze application rate is 400g / m². 3 The base protective glaze application rate is 170g / m². 3 The surface protective glaze application rate is 250g / m². 3 The ceramic slabs are fired at 1200℃ for 55 minutes and then polished to obtain large ceramic slabs.

[0033] Example 3: The elemental composition of a three-dimensional dry granule glaze in this example is as follows: 59% silicon dioxide, 8% aluminum oxide, 11.2% calcium oxide, 5.5% potassium oxide, 0.8% sodium oxide, 0.8% magnesium oxide, 9.2% zinc oxide, 0.3% titanium dioxide, and 0.6% iron oxide, with the remainder being loss on ignition. A type of dry granule glaze with strong three-dimensional effect is composed of the following components: 2 kg of kaolin, 32 kg of quartz, 17.8 kg of calcite, 3.6 kg of dolomite, 32.4 kg of potassium feldspar, 6.8 kg of sodium feldspar, 9.2 kg of zinc oxide, 0.3 kg of rutile and 0.6 kg of iron oxide red.

[0034] This embodiment describes a method for preparing a dry granular glaze with a strong three-dimensional effect, comprising the following steps: S11. Mix and grind the raw materials of dry granule glaze to obtain a mixture, add it to a furnace for melting, the melting temperature range is 1170℃, the melting time is 1h, immediately add it to cold water for water quenching after melting, and dry it at 100℃ to obtain a mixture. S12. The mixture is added to a ball mill and ball-milled for 5 hours. The passing rate of the 160-mesh sieve is 90%, and a dry granule glaze with a strong three-dimensional effect is obtained.

[0035] The ceramic slab of this embodiment includes, from bottom to top, a body layer, a base glaze layer, a color and pattern layer, a base protective glaze, a dry granule layer, and a surface protective glaze. The dry granule layer is fired from the dry granule glaze as described above.

[0036] The thickness of the body layer is 12mm, the thickness of the base glaze layer is 0.5mm, the thickness of the color pattern layer is 0.2mm, the thickness of the base protective glaze is 0.2mm, the thickness of the dry granule layer is 0.6mm, and the thickness of the surface protective glaze is 0.4mm.

[0037] The method for preparing the ceramic slab in this embodiment includes the following steps: S1. Roll-press the billet into shape and dry it at 100°C to obtain the billet layer; S2. Apply a base glaze to the body layer, with a base glaze application rate of 300g / m². 3Inkjet printing of colors and patterns is used to create ceramic slab substrates; S3. Spray the base protective glaze onto the surface of the ceramic slab substrate. Using a dry granulator, apply the three-dimensional dry granule glaze to the ceramic slab substrate surface, followed by the top protective glaze. The dry granule glaze application rate is 360g / m². 3 The base protective glaze application rate is 190g / m². 3 The surface protective glaze application rate is 250g / m². 3 The ceramic slabs were fired at 1220℃ for 45 minutes and then polished to obtain large ceramic slabs.

[0038] Example 4: The elemental composition of a three-dimensional dry granule glaze in this example is as follows: 60% silicon dioxide, 8.8% aluminum oxide, 12.1% calcium oxide, 6.8% potassium oxide, 0.9% sodium oxide, 0.8% magnesium oxide, 9% zinc oxide, 0.3% titanium dioxide, and 0.8% iron oxide, with the remainder being loss on ignition. A type of dry granule glaze with strong three-dimensional effect is composed of the following components: 1.3 kg of kaolin, 28 kg of quartz, 19.3 kg of calcite, 3.6 kg of dolomite, 40 kg of potassium feldspar, 7.5 kg of sodium feldspar, 9 kg of zinc oxide, 0.3 kg of rutile and 0.9 kg of iron oxide.

[0039] This embodiment describes a method for preparing a dry granular glaze with a strong three-dimensional effect, comprising the following steps: S11. Mix and grind the raw materials of dry granule glaze to obtain a mixture, add it to a furnace for melting, the melting temperature range is 1140℃, the melting time is 2h, immediately add it to cold water for water quenching after melting, and dry it at 150℃ to obtain a mixture. S12. The mixture is added to a ball mill and ball-milled for 6 hours. The passing rate of the 120-mesh sieve is 90%, and a dry granule glaze with a strong three-dimensional effect is obtained.

[0040] The ceramic slab of this embodiment includes, from bottom to top, a body layer, a base glaze layer, a color and pattern layer, a base protective glaze, a dry granule layer, and a surface protective glaze. The dry granule layer is fired from the dry granule glaze as described above.

[0041] The body layer has a thickness of 10 mm, the base glaze layer has a thickness of 0.4 mm, the color pattern layer has a thickness of 0.3 mm, the base protective glaze has a thickness of 0.15 mm, the dry granule layer has a thickness of 1 mm, and the surface protective glaze has a thickness of 0.4 mm.

[0042] The method for preparing the ceramic slab in this embodiment includes the following steps: S1. Roll-press the billet into shape and dry it at 80°C to obtain a billet layer; S2. Apply a base glaze to the body layer, with a base glaze application rate of 300g / m². 3Inkjet printing of colors and patterns is used to create ceramic slab substrates; S3. Spray the base protective glaze onto the surface of the ceramic slab substrate. Then, using a dry granulator, apply the three-dimensional dry granule glaze to the surface of the ceramic slab substrate. Finally, spray the top protective glaze. The dry granule glaze application rate is 420g / m². 3 The base protective glaze application rate is 165g / m². 3 The surface protective glaze application rate is 250g / m². 3 The ceramic slabs were fired at 1190℃ for 50 minutes and then polished to obtain large ceramic slabs.

[0043] Example 5: The elemental composition of a three-dimensional dry granule glaze in this example is as follows: 58% silicon dioxide, 8.2% aluminum oxide, 11.5% calcium oxide, 5.2% potassium oxide, 1% sodium oxide, 0.9% magnesium oxide, 10% zinc oxide, 0.4% titanium dioxide, and 0.8% iron oxide, with the remainder being loss on ignition. A type of dry granule glaze with strong three-dimensional effect is composed of the following components: 2 kg of kaolin, 30.2 kg of quartz, 18 kg of calcite, 4.1 kg of dolomite, 32.5 kg of potassium feldspar, 8.4 kg of sodium feldspar, 10 kg of zinc oxide, 0.5 kg of rutile and 0.9 kg of iron oxide red.

[0044] This embodiment describes a method for preparing a dry granular glaze with a strong three-dimensional effect, comprising the following steps: S11. Mix and grind the raw materials of dry granule glaze to obtain a mixture, add it to a furnace for melting, the melting temperature range is 1160℃, the melting time is 2h, immediately add it to cold water for water quenching after melting, and dry it at 100℃ to obtain a mixture. S12. The mixture is added to a ball mill and ball-milled for 5 hours. The passing rate of the 110-mesh sieve is 90%, thus obtaining a dry granule glaze with a strong three-dimensional effect.

[0045] The ceramic slab of this embodiment includes, from bottom to top, a body layer, a base glaze layer, a color and pattern layer, a base protective glaze, a dry granule layer, and a surface protective glaze. The dry granule layer is fired from the dry granule glaze as described above.

[0046] The thickness of the body layer is 9mm, the thickness of the base glaze layer is 0.4mm, the thickness of the color pattern layer is 0.3mm, the thickness of the base protective glaze is 0.15mm, the thickness of the dry granule layer is 1mm, and the thickness of the surface protective glaze is 0.4mm.

[0047] The method for preparing the ceramic slab in this embodiment includes the following steps: S1. Roll-press the billet into shape and dry it at 100°C to obtain the billet layer; S2. Apply a base glaze to the body layer, with a base glaze application rate of 300g / m². 3Inkjet printing of colors and patterns is used to create ceramic slab substrates; S3. Spray the base protective glaze onto the surface of the ceramic slab substrate. Then, using a dry granulator, apply the three-dimensional dry granule glaze to the surface of the ceramic slab substrate. Finally, spray the top protective glaze. The dry granule glaze application rate is 450g / m². 3 The base protective glaze application rate is 200g / m². 3 The surface protective glaze application rate is 280g / m². 3 The ceramic slabs were fired at 1240℃ for 40 minutes and then polished to obtain large ceramic slabs.

[0048] Comparative Example 1 differs from Example 1 in that the elemental composition of a three-dimensional dry granule glaze in this comparative example is as follows: 60% silicon dioxide, 12.5% ​​aluminum oxide, 11% calcium oxide, 2.5% potassium oxide, 1.5% sodium oxide, 1.5% magnesium oxide, and 5.4% zinc oxide, with the remainder being loss on ignition.

[0049] Comparative Example 2 differs from Example 1 in that the elemental composition of a three-dimensional dry granule glaze in this comparative example is as follows: 53% silicon dioxide, 20% aluminum oxide, 19% calcium oxide, 0.6% potassium oxide, 2.5% sodium oxide, and 0.5% magnesium oxide, with the remainder being loss on ignition.

[0050] Comparative Example 3 differs from Example 1 in that the particle size of the dry granule glaze is replaced with a particle size that has a 90% pass rate through a 400-mesh sieve.

[0051] Performance testing According to GB / T 39156-2020 "Technical Requirements and Test Methods for Large-Size Ceramic Plates", the large ceramic plates prepared in the examples and comparative examples were cut into 10cm×10cm samples, dried in an oven to constant weight, and the initial mass was recorded. The samples were then immersed in deionized water, boiled for 2 hours, cooled to room temperature and allowed to stand for 4 hours. The samples were then removed, the residual moisture on the surface was absorbed, and the mass after water absorption was weighed. The water absorption rate was calculated according to the following formula: W represents the water absorption rate; m is the initial mass, in grams; m is the mass after water absorption, in grams.

[0052] The stain resistance of ceramic slabs prepared according to the test examples and comparative examples in GB / T 3810.14-2016 Ceramic Tile Test Methods Part 14: Determination of Stain Resistance.

[0053] The three-dimensional effect of the ceramic slabs prepared in the examples and comparative examples was observed with the naked eye, and the surface smoothness of the ceramic slabs prepared in the examples and comparative examples was tested by touch.

[0054] The test results are shown below: Table 1 Test Results As shown in the table above, the water absorption rate of the ceramic slabs prepared in Examples 1-5 is 0.01-0.03%, and the anti-fouling level of the ceramic slabs prepared in Examples 1-5 is all level 5. This indicates that the dry granule glaze prepared by the present invention can form a dense glaze layer and has excellent waterproof and anti-fouling properties. The ceramic slabs prepared in Examples 1-5 have a strong three-dimensional effect and clear patterns, indicating that the dry granule glaze of the present invention can improve the three-dimensional effect of the ceramic slabs. The dry granule glaze of Comparative Example 2 contains 53% silicon dioxide and 20% aluminum oxide, resulting in extremely high melt viscosity and difficulty in crystal formation. This makes the surface of the prepared ceramic slab dry, and the pores are more numerous and larger after polishing. Its water absorption rate is 0.15%, and the anti-fouling level is level 3.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dry-granule glaze with strong three-dimensional effect, characterized in that, The composition is as follows: silicon dioxide 57-60%, aluminum oxide 7-9%, calcium oxide 11-13%, potassium oxide 5-7%, sodium oxide 0.5-1%, magnesium oxide 0.5-1%, zinc oxide 9-10%, titanium dioxide 0.2-0.4%, and iron oxide 0.6-0.8%; It is composed of the following raw materials in parts by weight: 0.5-2 parts kaolin, 25-35 parts quartz, 15-20 parts calcite, 3-5 parts dolomite, 30-40 parts potassium feldspar, 6-8 parts sodium feldspar, 9-10 parts zinc oxide, 0.2-0.5 parts rutile and 0.6-1 parts iron oxide red; the dry granule glaze has a passing rate of 80-90% through a 120-160 mesh sieve.

2. The dry-granule glaze with strong three-dimensional effect according to claim 1, characterized in that, The preparation method of this dry granule glaze includes the following steps: S11. Mix and grind the raw materials to obtain a mixture, add it to a furnace for melting, immediately add it to cold water for water quenching after melting, and dry it to obtain a mixture. S12. Add the mixture to a ball mill, ball mill and sieve to obtain a dry granule glaze with a strong three-dimensional effect.

3. The dry-granule glaze with strong three-dimensional effect according to claim 2, characterized in that, The melting temperature range in S11 is 1140~1190℃, the melting time is 1~2h, and the drying is carried out at 100~150℃; the ball milling in S12 is 4~6h.

4. A large ceramic slab, characterized in that, From bottom to top, it includes a body layer, a base glaze layer, a color and pattern layer, a base protective glaze, a dry granule layer, and a surface protective glaze, wherein the dry granule layer is fired from the dry granule glaze as described in any one of claims 1-4.

5. A ceramic slab according to claim 4, characterized in that, The thickness of the body layer is 8~12mm, the thickness of the base glaze layer is 0.3~0.5mm, the thickness of the color pattern layer is 0.1~0.3mm, the thickness of the base protective glaze is 0.1~0.2mm, the thickness of the dry granule layer is 0.5~1.2mm, and the thickness of the surface protective glaze is 0.3~0.5mm. The composition of the blank layer is 60-70% silicon dioxide, 18-22% aluminum oxide, 2-4% calcium oxide, 0.1-0.3% iron oxide, 1-3% potassium oxide, 2-4.5% sodium oxide, 0.5-1.5% magnesium oxide, and the remainder being impurities; The composition of the base glaze layer is 57-63% silicon dioxide, 20-25% aluminum oxide, 3-5% calcium oxide, 0.1-0.3% iron oxide, 1-3% potassium oxide, 2-4.5% sodium oxide, 0.5-0.8% magnesium oxide, 0.5-2% zinc oxide and 0.2-0.5% titanium dioxide, with the remainder being impurities.

6. A method for preparing a large ceramic slab, characterized in that, Includes the following steps: S1. Roll-press the billet into shape and dry it to obtain a billet layer; S2. Apply a base glaze to the body layer and inkjet print color patterns to obtain the ceramic slab substrate. S3. Spray the base protective glaze slurry onto the surface of the ceramic slab substrate. Apply the three-dimensional dry granule glaze to the surface of the ceramic slab substrate using a dry granulator. Spray the top protective glaze, fire, and polish to obtain the ceramic slab.

7. The method for preparing a large ceramic slab according to claim 6, characterized in that, In step S1, the material is dried at 80-100℃; in step S2, the base glaze application rate is 200-300 g / m². 3 .

8. The method for preparing a large ceramic slab according to claim 6, characterized in that, The dry granule glaze application rate in S3 is 350~450g / m³. 3 The application rate of the protective glaze on the base is 150~200g / m². 3 The surface protective glaze application rate is 200~280g / m². 3 The firing temperature is 1100~1250℃ and the firing time is 40~60min.

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