A method for preparing a silver sand glitter dry granule, a slip, and a ceramic tile having a silver sand decoration effect

Abstract

The present application relates to the technical field of ceramic production, and discloses a kind of silver sand flash dry particle, slip and the preparation method of ceramic tile with silver sand decorative effect, wherein a large amount of iron oxide is introduced in the preparation of silver sand flash dry particle, a proper amount of quartz is introduced and the firing process is optimized, the formula composition of silver sand flash dry particle directly affects the metal flash effect of product, in addition to satisfying with silver sand flash effect, it also solves the problem of compatibility with high-temperature matte dry particle, base glaze and the like.The ceramic tile of the present application is prepared by silver sand flash dry particle, high-temperature matte dry particle, the components and ratio thereof are adjusted and optimized, the lightness of dry particle is adjusted and optimized by adding color to base glaze, and the contrast between base color and silver sand flash dry particle is increased, and at the same time, the metal dry particle can be polished, so as to achieve the purpose of enhancing silver sand flash effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ceramic production, and particularly relates to a silver sand flash dry particle, a glaze slurry and a preparation method of a ceramic tile with a silver sand decoration effect. BACKGROUND

[0002] From ancient times to the present, people have always preferred to use precious metals as decorative materials, such as magnificent palaces, solemn temples, etc. However, precious metals are rare and expensive, and ordinary people cannot afford them. If ceramic tiles, as a commonly used decorative material, can be given a metallic texture, it will undoubtedly greatly increase their added value and market sales. The metal texture ceramic tile products on the market at present mainly include golden yellow, silver white, copper green and iron black, etc. The preparation process of these products is usually to add excessive metal oxides in the glaze formula, and to realize the metallic texture by precipitating metal crystals on the glaze surface during the firing process. However, this preparation process has very strict requirements on the firing process, and there is a certain degree of control difficulty in the production process, resulting in a low rate of excellent products. In addition, since the metal crystals are precipitated on the surface of the glaze layer, it is difficult to polish and brighten the product, which affects the flash effect of the metallic texture. SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the present application is to provide a silver sand flash dry particle, a glaze slurry and a preparation method of a ceramic tile with a silver sand decoration effect, wherein a large amount of iron oxide is introduced in the preparation of the silver sand flash dry particle, a proper amount of quartz is introduced, and the firing process is optimized. The formula composition of the silver sand flash dry particle directly affects the metallic flash effect of the product. In addition to meeting the silver sand flash effect, it also solves the problem of compatibility with high-temperature matte dry particles, base glaze, etc. The ceramic tile of the present application realizes the purpose of enhancing the silver sand flash effect by preparing silver sand flash dry particles and high-temperature matte dry particles, adjusting and optimizing the components and proportions thereof, adding color to the base glaze, adjusting the brightness of the dry particles, etc., increasing the contrast between the base color and the silver sand flash dry particles, and realizing the polishing of the metallic dry particles.

[0004] To solve the above problems, the present application realizes the following technical scheme:

[0005] The first invention purpose of the present application is:

[0006] A preparation method of a silver sand flash dry particle is provided, which comprises the following components by weight percentage:

[0007] Iron oxide 80-96%, quartz 3-8%, talc 1-3%, titanium oxide 0.2-0.6%, and aluminum oxide 0.1-2%; the sum of all components is 100%;

[0008] The raw material components are weighed according to the formula, mixed uniformly, melted at 1600 DEG C, and kept for 5-8 hours, then slowly cooled to room temperature at a cooling rate of 8-25 DEG C / h, so that the metal alpha-Fe2O3 crystals are precipitated, the dry particles of 20-40 mesh are obtained after crushing and screening, and the silver sand flash dry particles are prepared.

[0009] The further optimization of the preparation method of the silver sand flash dry particles is:

[0010] The chemical composition of the silver sand dry particles is: SiO2 3-5%, Al2O3 0.5-2%, Fe2O3 90-96%, CaO 0.1-0.8%, MgO 0.3-0.9%, K2O 0-0.2%, Na2O 0-0.2%, TiO2 0.1-0.6%, loss on ignition 0-0.8%, and the sum of all components is 100%.

[0011] The second inventive purpose of the present application is:

[0012] The preparation method of the silver sand flash dry particle glaze slurry comprises the following components by weight:

[0013] 100 parts of glue suspension agent, 15-50 parts of the silver sand flash dry particles described above, and 10-30 parts of high-temperature matte dry particles;

[0014] The raw material components are weighed according to the formula, stirred uniformly, and aged for 2-6 hours, so that the silver sand flash dry particle glaze slurry is prepared;

[0015] The high-temperature matte dry particles comprise the following components by weight percentage:

[0016] Potassium feldspar 50-60%, talc 5-10%, calcite 7-15%, barium carbonate 5-10%, wollastonite 5-10%, zinc oxide 3-5%, and aluminum oxide 3-7%; the sum of all components is 100%.

[0017] The corresponding raw material components are selected according to the formula of the high-temperature matte dry particles, mixed uniformly by using a dry mixing method, melted at 1600 DEG C, quenched in water, dried, crushed, and screened to remove iron, so that the high-temperature matte dry particles with a particle size of 40-150 mesh are prepared.

[0018] The further optimization of the preparation method of the silver sand flash dry particle glaze slurry is:

[0019] The high-temperature matt dry granule has the following chemical composition: SiO2 59-65%, Al2O3 18-22%, Fe2O3 0.1-0.7%, CaO 10-11%, MgO 0.8-3%, K2O 3.5-5.5%, Na2O 0.8-1.5%, TiO2 0-0.1%, BaO 3-7%, ZnO 3-5%, loss on ignition 0-0.1%, and the sum of all components is 100%.

[0020] A third object of the present application is to provide a method for preparing a ceramic tile with silver sand decorative effect.

[0021] The method for preparing a ceramic tile with silver sand decorative effect comprises the following preparation steps:

[0022] S1. Preparing a green body and applying a base glaze to the green body to obtain a tile body A;

[0023] S2. Printing an inkjet pattern on the tile body A to obtain a tile body B;

[0024] S3. Spraying the silver sand flash dry granule glaze slurry as described above on the tile body B to obtain a tile body C;

[0025] S4. High-temperature firing the tile body C to obtain a tile body D;

[0026] S5. Brushing and polishing the tile body D and performing inspection to obtain a ceramic tile with silver sand decorative effect.

[0027] The method for preparing a ceramic tile with silver sand decorative effect of the present application is further optimized as follows:

[0028] The base glaze in step S1 comprises the following components by weight percentage:

[0029] Potassium feldspar 40-60%, kaolin 5-10%, alumina 12-18%, zirconium silicate 5-15%, quartz 10-30%, and talc 2-5%; the sum of all components is 100%;

[0030] An auxiliary raw material with a weight percentage of 1.0-1.5% and a glaze colorant with a weight percentage of 0.5-10% are additionally added;

[0031] The auxiliary raw material comprises sodium tripolyphosphate and methyl cellulose;

[0032] The glaze colorant comprises a mixture of one or more of cobalt black, wrapped red, wrapped yellow, and cobalt blue;

[0033] The base glaze has the following chemical composition by weight percentage:

[0034] SiO2 53-65%, Al2O3 18-27%, Fe2O3 0.1-0.5%, CaO 0.1-0.8%, MgO 0.1-0.9%, K2O 2.8-3.9%, Na2O 1.2-2.1%, TiO2 0-0.1%, ZrO2 4-12%, loss on ignition 0-0.8%, and the sum of all components is 100%.

[0035] The further optimization of the method for preparing the ceramic tile with silver sand decoration effect is that:

[0036] The specific gravity of the glaze slurry of the base glaze in step S1 is 1.85-1.95 g / ml, the flow rate is 30-60 seconds (100 ml volt cup), and the application amount of the base glaze is 400-700 g / m 2 .

[0037] The further optimization of the method for preparing the ceramic tile with silver sand decoration effect is that:

[0038] The specific gravity of the silver sand flash dry particle glaze slurry in step S3 is 1.15-1.55 g / ml, the flow rate is 40-80 seconds (100 ml volt cup), and the application amount of the silver sand flash dry particle glaze slurry is 200-600 g / m 2 .

[0039] The further optimization of the method for preparing the ceramic tile with silver sand decoration effect is that:

[0040] The high-temperature firing time in step S4 is 45-60 minutes, and the firing temperature is 1150-1180 DEG C.

[0041] The further optimization of the method for preparing the ceramic tile with silver sand decoration effect is that:

[0042] The brushing and polishing in step S5 is sequentially polished by using an elastic abrasive block, a matte module and a carbon fiber abrasive block as polishing abrasives, and the lightness after polishing is 7-15 degrees;

[0043] The main component of the elastic abrasive block is resin-bonded diamond abrasive;

[0044] The main component of the matte module is resin-bonded silicon carbide and magnesium oxide abrasive;

[0045] The main component of the carbon fiber abrasive block is ultra-fine silicon carbide abrasive and carbon fiber combination.

[0046] The technical scheme of the present application prepares silver sand flash dry particles and high-temperature matte dry particles in advance, mixes the silver sand flash dry particles and the high-temperature matte dry particles according to a certain ratio to prepare a silver sand dry particle glaze, and performs a polishing process after high-temperature firing to obtain a ceramic tile product with a silver sand dry particle decoration effect.

[0047] The present application focuses on the research of the following key technologies:

[0048] (I) Preparation of silver sand flash dry particles:

[0049] The formula composition of the silver sand flash dry particles directly affects the metal flash effect of the product. For the silver sand flash dry particles, in addition to meeting the silver sand flash effect, it also needs to meet the compatibility with matte dry particles, base glaze and the like.

[0050] In order to obtain silver sand flash dry particles meeting the production needs, the present application adjusts and optimizes them from the following aspects.

[0051] (1) Introducing a large amount of iron oxide:

[0052] The preparation of the silver sand flash dry particles in the present application mainly causes the Fe element to be enriched and supersaturated to precipitate alpha-Fe2O3 during high-temperature firing. Since the arrangement of alpha-Fe2O3 has good orientation, when the physical coloration caused by the structural arrangement plays a leading role, the chemical coloration of Fe 3+ is inhibited, and the macroscopic appearance is silver white, rather than the original iron red or rust color. Therefore, the amount of iron oxide added in the formula has a crucial influence on the crystal precipitation of alpha-Fe2O3. The present application adds a large amount of iron oxide (80-96%) in the formula to make the iron content in a saturated state, thereby achieving the purpose of promoting the crystallization of iron oxide.

[0053] (2) Introducing an appropriate amount of quartz:

[0054] Since a large amount of iron oxide is added in the formula of the silver sand flash dry particles, in order to solve the compatibility problem of the silver sand flash dry particles and the matte dry particles, the present application introduces an appropriate amount of quartz in the formula of the silver sand flash dry particles. Quartz is a commonly used raw material for ceramic glaze, and the addition of quartz effectively solves the combination problem of the silver sand flash dry particles and the matte dry particles.

[0055] (3) Optimization of firing process:

[0056] Different from the melting and quenching process of common sintered frit dry particles, since the alpha-Fe2O3 crystal needs to be precipitated from the silver sand flash dry particles, energy and time for crystal growth are needed in the process of crystallization. By referring to the firing process of the ancient porcelain iron crystalline glaze, after the mixed raw materials are prepared and evenly mixed, the raw materials are placed in a melting furnace and melted at 1600 DEG C for 5-8 hours, and then slowly cooled to room temperature at a cooling rate of 8-25 DEG C / h, so that the alpha-Fe2O3 crystal is precipitated, and the silver sand flash dry particles are obtained through crushing and screening.

[0057] (4) Optimization of particle fineness of silver sand flash dry particles:

[0058] The particle fineness of the silver sand flash dry particles has a great influence on the flash effect of the glaze surface. The finer the particle, the worse the flash effect. However, when the silver sand flash particles are relatively coarse, the glaze curtain is easy to branch during glazing, and the glaze surface is also relatively rough, which is difficult to produce.

[0059] The silver sand flash dry particles are crushed and screened in the present application, and the particles are screened into 4-6 mesh, 20-40 mesh and 60-100 mesh.

[0060] Table 1 Influence of silver sand flash dry particle fineness on glaze surface effect

[0061]

[0062] Through comparison, the glaze surface effect is optimal when the silver sand flash dry particle fineness is 20-40 mesh. Therefore, in the preparation process of the present application, the silver sand flash dry particles are crushed and screened to obtain 20-40 mesh silver sand flash dry particles for use.

[0063] (II) Preparation of high-temperature matte dry particles:

[0064] In order to further highlight the silver sand flash effect, the present application reduces the gloss of the glaze dry particles, and the low-gloss matte dry particle surface can better highlight the silver sand flash effect.

[0065] In order to obtain high-temperature matte dry particles that meet the production needs, the present application adjusts and optimizes the existing matte dry particle formula from the following aspects:

[0066] (1) Introducing alumina powder:

[0067] Alumina (Al2O3) plays a role in forming a network intermediate in the glaze. The melting point of alumina is high, and the chemical property is stable. By introducing alumina, the melting temperature of the dry particles can be significantly improved, and the gloss of the dry particles can be reduced. Higher melting temperature can avoid the reaction between the silver sand flash dry particles and the high-temperature matte dry particles during high-temperature firing, thereby affecting the glaze surface and the flash effect.

[0068] (2) Introducing appropriate amounts of calcium oxide, barium oxide and magnesium oxide components:

[0069] Calcium oxide, barium oxide, magnesium oxide in the glaze mainly function is flux, reduce the dry particle melting temperature, improve the chemical stability and anti-pollution performance of glaze surface. Compared with K2O, Na2O, its melting range is wider. At the same time, calcium oxide, barium oxide, magnesium oxide and Al, Si react to form microcrystalline at high temperature, thereby reducing the dry particle brightness. In addition, the microcrystalline can also enhance the hardness and corrosion resistance of the glaze surface.

[0070] (III) Optimization of polishing process:

[0071] The existing glaze polishing process usually has three processes of rough grinding, fine grinding and fine grinding. The produced glazed tiles have high gloss, which cannot achieve the required brightness of silver sand dry particles. However, the traditional soft polishing technology usually removes the fine grinding process to reduce the gloss of the glaze surface, but the glazed tile surface after polishing has serious scratches and uneven brightness. Therefore, in order to obtain a silver sand product with good flashing effect, the polishing process is improved in the present application.

[0072] After research, the following three kinds of polishing abrasives are used in the present project:

[0073] (1) using elastic abrasive block as polishing abrasive, the main component of the abrasive block is resin bonded diamond abrasive;

[0074] (2) using matte module as polishing abrasive, the main component of the abrasive block is resin bonded silicon carbide and magnesium oxide abrasive;

[0075] (3) using carbon fiber abrasive block as polishing abrasive, the main component of the carbon fiber abrasive block is ultra-fine silicon carbide abrasive and carbon fiber combination.

[0076] The products are polished in turn by the above three kinds of abrasives, and the obtained products have uniform and moderate gloss (7-15 degrees), smooth hand feeling and strong silver sand flashing effect. BRIEF DESCRIPTION OF DRAWINGS

[0077] Figure 1 The physical map of the ceramic tile with silver sand decorative effect prepared in Example 1 of the present application. DETAILED DESCRIPTION

[0078] In order to make the application, technical scheme and advantages of the present application more clear and explicit, the present application is described in detail in combination with specific examples. It should be understood that the examples are only used to illustrate the present application, and are not limited to the protection scope of the present application. Any simple improvement of the preparation method of the present application within the concept of the present application belongs to the protection scope of the present application.

[0079] Example 1

[0080] A preparation method of a ceramic tile with silver sand decorative effect, comprising the following preparation steps:

[0081] S1. Preparing a blank, and applying a base glaze to the blank to obtain a tile body A;

[0082] S2. Printing an inkjet pattern on the tile body A to obtain a tile body B;

[0083] S3. Spraying a silver sand flash dry particle glaze on the tile body B to obtain a tile body C;

[0084] S4. High-temperature firing the tile body C to obtain a tile body D;

[0085] S5. Brushing and sorting the tile body D to obtain a ceramic tile with a silver sand decorative effect.

[0086] The base glaze in step S1 includes the following components by weight percentage:

[0087] Potassium feldspar 52%, kaolin 8%, alumina 14%, zirconium silicate 7%, quartz 15%, talc 4%;

[0088] An auxiliary raw material with a weight percentage of 1.2% and a black glaze material with a weight percentage of 3% are additionally added;

[0089] The auxiliary raw material includes sodium tripolyphosphate and methyl cellulose.

[0090] The specific gravity of the base glaze slip is 1.88 g / ml, the flow rate is 38 seconds (100 ml volt cup), and the base glaze application amount is 490 g / m 2 .

[0091] The silver sand flash dry particle glaze in step S3 includes the following components by weight:

[0092] Glue suspension agent 100 parts, silver sand flash dry particle 23 parts, high-temperature matte dry particle 15 parts;

[0093] The raw material components are weighed according to the formula, uniformly stirred, and aged for 2-6 hours to obtain the silver sand flash dry particle glaze;

[0094] The specific gravity of the silver sand flash dry particle glaze is 1.42 g / ml, the flow rate is 56 seconds (100 ml volt cup), and the silver sand flash dry particle glaze application amount is 320 g / m 2 .

[0095] The silver sand flash dry particle includes the following components by weight percentage:

[0096] Iron oxide 94%, quartz 3.3%, magnesite 1.2%, nano titanium oxide 0.3%, alumina 1.2%;

[0097] The raw material components are weighed according to the formula, mixed uniformly, melted at 1600 DEG C, and kept for 6 hours, then cooled to room temperature at a rate of 15 DEG C / h, so that the metal alpha-Fe2O3 crystals are precipitated, and then the dry particles of 20-40 mesh are prepared by crushing and sieving.

[0098] The high-temperature matte dry particles comprise the following components by weight percentage:

[0099] Potassium feldspar 58%, talc 7%, calcite 10%, barium carbonate 8%, wollastonite 8%, zinc oxide 4%, aluminum oxide 5%;

[0100] The corresponding raw material components are selected according to the formula of the high-temperature matte dry particles, mixed uniformly by dry mixing, melted at 1600 DEG C, quenched in water, dried, crushed, and then the high-temperature matte dry particles with a particle size of 40-150 mesh are prepared by sieving out the iron.

[0101] The high-temperature firing time in step S4 is 55 minutes, and the firing temperature is 1163 DEG C.

[0102] The brushing and polishing in step S5 preferably uses elastic polishing blocks, matte modules, and carbon fiber polishing blocks as polishing abrasives for sequential polishing, and the lightness after polishing is 7-15 degrees.

[0103] Example 2

[0104] A preparation method of a ceramic tile with silver sand decorative effect, comprising the following preparation steps:

[0105] S1. Preparing a body, and applying a base glaze to the body to obtain a tile body A;

[0106] S2. Printing an inkjet pattern on the tile body A to obtain a tile body B;

[0107] S3. Spraying a silver sand flash dry particle glaze slurry on the tile body B to obtain a tile body C;

[0108] S4. High-temperature firing the tile body C to obtain a tile body D;

[0109] S5. Brushing and polishing the tile body D, and then sorting to obtain a ceramic tile with silver sand decorative effect.

[0110] The base glaze in step S1 comprises the following components by weight percentage:

[0111] Potassium feldspar 42%, kaolin 8%, aluminum oxide 10%, zirconium silicate 12%, quartz 23%, talc 5%;

[0112] An auxiliary raw material with a weight percentage of 1% and a glaze black material with a weight percentage of 6% are additionally added;

[0113] The auxiliary raw materials include sodium tripolyphosphate and methyl cellulose.

[0114] The specific gravity of the glaze slurry of the base glaze is 1.92 g / ml, the flow rate is 35 seconds (100 ml volt cup), and the application amount of the base glaze is 560 g / m 2 .

[0115] The silver sand flash dry granular glaze slurry in step S3 comprises the following components by weight:

[0116] 100 parts of glue suspension agent, 45 parts of silver sand flash dry granular, and 20 parts of high-temperature matte dry granular;

[0117] The raw material components are weighed according to the formula, uniformly stirred, and aged for 2-6 hours to prepare the silver sand flash dry granular glaze slurry.

[0118] The specific gravity of the silver sand flash dry granular glaze slurry is 1.5 g / ml, the flow rate is 50 seconds (100 ml volt cup), and the application amount of the silver sand flash dry granular glaze slurry is 400 g / m 2 .

[0119] The silver sand flash dry granular comprises the following components by weight percentage:

[0120] 94% of iron oxide, 3.3% of quartz, 1.2% of talc, 0.3% of titanium oxide, and 1.2% of aluminum oxide;

[0121] The raw material components are weighed according to the formula, uniformly mixed, melted at 1600°C, and kept for 6.5 hours. Then, the temperature is lowered to room temperature at a rate of 22°C / h, so that the metal α-Fe2O3 crystals are precipitated. After crushing and screening, the dry granular with a size of 20-40 mesh is prepared.

[0122] The high-temperature matte dry granular comprises the following components by weight percentage:

[0123] 58% of potassium feldspar, 7% of talc, 10% of calcite, 8% of barium carbonate, 8% of wollastonite, 4% of zinc oxide, and 5% of aluminum oxide;

[0124] The corresponding raw material components are selected according to the formula of the high-temperature matte dry granular, and uniformly mixed by dry mixing. Then, the mixture is melted at 1600°C, quenched in water, dried, crushed, and screened to prepare the high-temperature matte dry granular with a size of 40-150 mesh.

[0125] The high-temperature firing time in step S4 is 50 minutes, and the firing temperature is 1160°C.

[0126] In step S5, the brushing and polishing are preferably performed by using an elastic polishing block, a matte module, and a carbon fiber polishing block as a polishing tool for sequential polishing. After polishing, the gloss is 7-15 degrees.

[0127] Comparative Examples 1-3 are the same as the preparation method of Example 1, the main difference is that the selection of part of the raw materials is different, and the specific raw material difference and glaze effect are shown in Table 2.

[0128] Table 2 Comparison of glaze effects of examples and comparative examples

[0129] Project Addition of silver sand luster dry particles Addition of matte dry particles Glaze effect Example 1 Silver sand luster dry particles High-temperature matte dry particles Smooth glaze, clear silver sand luster effect Example 2 Silver sand luster dry particles High-temperature matte dry particles Smooth glaze, clear silver sand luster effect Comparative Example 1 Ordinary luster dry particles High-temperature matte dry particles Smooth glaze, no silver sand luster effect Comparative Example 2 Silver sand luster dry particles Bright dry particles Strong light feeling, weak silver sand luster effect Comparative Example 3 Ordinary luster dry particles Bright dry particles Smooth glaze, no silver sand luster effect

[0130] The ceramic tile of the present application increases the contrast of the base color and the silver sand flash dry particle by preparing silver sand flash dry particle and high-temperature matte dry particle, adjusting and optimizing the components and the ratio, adding color to the base glaze, and adjusting the brightness of the dry particle. At the same time, the metal dry particle can be polished, so as to achieve the purpose of enhancing the silver sand flash effect. Therefore, the matching of the silver sand flash dry particle and the high-temperature matte dry particle is crucial.

[0131] In Comparative Example 1, the use of ordinary flash dry particle results in no silver sand flash effect on the glaze.

[0132] In Comparative Example 2, the use of bright dry particle results in strong light on the glaze, thereby weakening the silver sand flash.

[0133] In Comparative Example 3, the use of ordinary flash dry particle and bright dry particle also results in no flash effect on the glaze.

[0134] In summary, the above is only a preferred example of the present application, and does not limit the present application in any form; any slight change, modification and evolution of the disclosed technical content within the scope of the technical solution of the present application by those skilled in the art are considered as equivalent examples of the present application; at the same time, any equivalent change, modification and evolution of the above examples according to the essence of the present application are still within the protection scope of the technical solution of the present application.

[0135] The technical features of the above-described examples can be combined arbitrarily, and in order to make the description concise, all possible combinations of the technical features in the above examples are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0136] Unless otherwise specified, the experimental methods in the present application are usually carried out according to the conventional conditions or according to the conditions suggested by the manufacturers.

[0137] Unless otherwise specified, the various optimization technical solutions in the present application can be combined with each other.

[0138] Unless otherwise specified, the percentages and parts are weight percentages and weight parts.

[0139] The experimental methods described in the specification and in the examples were generally performed according to conventional conditions or according to the conditions recommended by the manufacturer, unless otherwise specified.

[0140] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Furthermore, any method and material similar or equivalent to those described herein can be used in the practice of the present application.

Claims

1. A method for preparing a silver sand flash dry granular glaze, characterized in that: the silver sand flash dry granular glaze comprises the following components by weight: glue suspension agent 100 parts, silver sand flash dry granules 15-50 parts, and high-temperature matte dry granules 10-30 parts; the raw material components are weighed according to the formula, uniformly stirred, and then aged for 2-6 hours to obtain the silver sand flash dry granular glaze. 2.The method for preparing the silver sand flash dry granular glaze according to claim 1, characterized in that: the chemical composition of the silver sand flash dry granules is: SiO2 3-5%, Al2O3 0.5-2%, Fe2O3 90-96%, CaO 0.1-0.8%, MgO 0.3-0.9%, K2O 0-0.2%, Na2O 0-0.2%, TiO2 0.1-0.6%, and loss on ignition 0-0.8%; and the sum of all components is 100%. 3.The method for preparing the silver sand flash dry granular glaze according to claim 1, characterized in that: the chemical composition of the high-temperature matte dry granules is: SiO2 59-65%, Al2O3 18-22%, Fe2O3 0.1-0.7%, CaO 10-11%, MgO 0.8-3%, K2O 3.5-5.5%, Na2O 0.8-1.5%, TiO2 0-0.1%, BaO 3-7%, ZnO 3-5%, and loss on ignition 0-0.1%; and the sum of all components is 100%. 4.A method for preparing a ceramic tile with a silver sand decorative effect, characterized in that: it comprises the following preparation steps: S1. preparing a green body and applying a base glaze to the green body to obtain a tile body A; S2. printing an inkjet pattern on the tile body A to obtain a tile body B; S3. spraying the silver sand flash dry granular glaze according to claim 1 on the tile body B to obtain a tile body C; and S4. high-temperature firing the tile body C to obtain a tile body D. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ S5. The brick body D is brushed and polished, and the ceramic tile with silver sand decoration effect is obtained.

5. The method according to claim 4, characterized in that: The base glaze in step S1 comprises the following components by weight percentage: Potassium feldspar 40-60%, kaolin 5-10%, alumina 12-18%, zirconium silicate 5-15%, quartz 10-30%, talc 2-5%; the sum of all components is 100%; An auxiliary raw material with a weight percentage of 1.0-1.5% and a glaze colorant with a weight percentage of 0.5-10% are added; The auxiliary raw material comprises sodium tripolyphosphate and methyl cellulose; The glaze colorant comprises a mixture of one or more of cobalt black, wrapped red, wrapped yellow, cobalt blue, etc. The base glaze has the following chemical composition by weight percentage: SiO2 53-65%, Al2O3 18-27%, Fe2O3 0.1-0.5%, CaO 0.1-0.8%, MgO 0.1-0.9%, K2O 2.8-3.9%, Na2O 1.2-2.1%, TiO2 0-0.1%, ZrO2 4-12%, loss on ignition 0-0.8%, and the sum of all components is 100%.

6. The method according to claim 4, characterized in that: The slip of the base glaze in step S1 has a specific gravity of 1.85 to 1.95 g / ml and a flow rate of 30 to 60 seconds, and the base glaze is applied at a rate of 400 to 700 g / m 2 .

7. The method according to claim 4, characterized in that: The specific gravity of the silver sand flash dry granular glaze in step S3 is 1.15-1.55 g / ml, the flow rate is 40-80 seconds, and the application amount of the silver sand flash dry granular glaze is 200-600 g / m 2 .

8. The method according to claim 4, characterized in that: The high-temperature firing in step S4 is performed for 45-60 minutes at a firing temperature of 1150-1180°C.

9. The method according to claim 4, characterized in that: The brushing and polishing in step S5 is performed using an elastic abrasive block, a matte module, and a carbon fiber abrasive block as polishing abrasives for sequential polishing, and the polished lightness is 7-15 degrees; The main component of the elastic abrasive block is resin-bonded diamond abrasive; The main component of the matte module is resin-bonded silicon carbide and magnesium oxide abrasive; The main component of the carbon fiber abrasive block is ultra-fine silicon carbide abrasive and carbon fiber combination.

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