Preparation method of combined dry particle cluster, ceramic rock plate with different-color and special-shaped pattern decoration effect and preparation method of ceramic rock plate

Abstract

The invention belongs to the technical field of building decoration, and particularly relates to a preparation method of a combined dry particle cluster, a ceramic rock plate with a different-color and special-shaped pattern decoration effect and a preparation method of the ceramic rock plate. The preparation method comprises the following steps: uniformly mixing dry granular mineral raw materials, and melting at high temperature to obtain molten glass; drawing the molten glass into glass fibers by using a crucible wire drawing technology; carrying out sizing treatment on the glass fibers; arranging the sized dry-particle glass fibers according to a design pattern, and performing heat treatment to obtain a dry-particle bundle; and chopping the dry particle cluster to obtain the combined dry particle cluster. The invention solves the problems that the decorative effect is single due to the adoption of a traditional dry granule preparation and application mode for a dry granule decorative ceramic product in the prior art, and the dry granules are kept granular after being fired or obvious separation boundaries exist among different dry granules.

Description

Technical Field

[0001] This invention belongs to the field of architectural decoration technology, and particularly relates to a method for preparing combined dry granule bundles, a ceramic rock slab with different colored and shaped decorative effects, and the preparation method thereof. Background Technology

[0002] Current technology primarily uses inkjet printers to spray adhesive, followed by dry granule application via a dry granule spreading machine for dry granule decoration. Due to production line limitations and cost control principles, building ceramics companies can only perform single-granule decoration when installing only one dry granule spreading machine, which greatly restricts the customized design of decorative effects for ceramic products.

[0003] Chinese Patent ZL 202210632867.3 relates to a white polycrystalline dry granule ceramic slab and its preparation method. The method involves applying a base glaze to the surface of a ceramic body, then inkjet printing an effect pattern onto the glazed surface, followed by applying a release glaze, and finally, strategically placing white polycrystalline dry granules onto the glazed surface. This, combined with the inkjet pattern, creates a decorative product. After firing, it forms single white crystal flowers of various shapes, but the decorative effect is limited.

[0004] Chinese patent ZL202411019036.4 relates to a method for preparing unfired dry granules, unfired dry granule ceramic tiles, and the same method. The method involves inkjet printing an adhesive pattern onto the surface of a glazed body, applying unfired dry granules to the surface after the adhesive pattern is applied, inkjet printing a regular ink pattern onto the surface after the dry granules are applied, and finally applying a protective glaze to the surface after the regular ink pattern is applied, resulting in unfired dry granule ceramic tiles. The fired product only exhibits the positioning texture of a single colored particle, lacking any special pattern effects and offering a limited decorative effect. Summary of the Invention

[0005] Existing dry-granule decorative ceramic products employ traditional dry-granule preparation and application methods, resulting in limited decorative effects. Furthermore, the dry granules remain granular after firing, or there are distinct dividing lines between different granules. To address these problems, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for preparing a combined dry particle bundle. The preparation method includes: uniformly mixing dry particle mineral raw materials and melting them at high temperature to obtain a glass melt; drawing the glass melt into glass wires using a crucible drawing technique; applying a sizing treatment to the glass wires; arranging the sizing-treated dry particle glass wires according to a designed pattern and then heat-treating them to obtain a dry particle bundle; and then shaving the dry particle bundle to obtain a combined dry particle bundle.

[0006] Preferably, the raw material composition of the sizing agent in the sizing treatment includes, by mass percentage: 5%~10% PVA, 40%~60% water glass, 1%~2% defoamer, 0.3%~1% emulsifier, and 27%~50% water. More preferably, the PVA is water-soluble polyvinyl alcohol with a degree of hydrolysis ≤95%; the water glass modulus is 2.6~3.3; and the emulsifier is one of OP-10, NP-10, Tween-80, and AEO-9. The degree of hydrolysis refers to the percentage of hydroxyl groups in the product obtained after hydrolysis compared to the original functional groups.

[0007] Preferably, the heat treatment temperature is 100~160℃ and the heat treatment time is 1~5h.

[0008] Preferably, the combined dry granule bundle is formed from at least two of the following: basic dry granules, colored dry granules, and low-temperature dry granules. In an optional embodiment, the mass percentage of basic dry granules, colored dry granules (also referred to as colored basic dry granules), or low-temperature dry granules in the combined dry granule bundle each does not exceed 60%.

[0009] Preferably, the mineral composition of the basic dry granules includes, by mass percentage: 5%–10% kaolin, 20%–30% zinc oxide, 45%–70% high-zinc, high-calcium frit, and 5%–15% wollastonite. The chemical composition of the high-zinc, high-calcium frit includes, by mass percentage (loss on ignition): SiO2: 50%–60%, Al2O3: 5%–10%, CaO: 5%–15%, MgO: 1%–5%, K2O: 3%–6%, Na2O: 1%–3%, and ZnO: 5%–10%.

[0010] Preferably, the chemical composition of the basic dry granules includes, by mass percentage: SiO2: 45%~58%, Al2O3: 5%~10%, Fe2O3: 0.1%~0.3%, TiO2: 0.01%~0.03%, CaO: 5%~15%, MgO: 1%~3%, K2O: 3%~5%, Na2O: 1%~2%, ZnO: 25%~35%. More preferably, the melting temperature of the basic dry granules is 1100~1150℃.

[0011] Preferably, the colored dry granules comprise base dry granules and a colorant; more preferably, the colorant accounts for 0.5% to 2% of the mass of the base dry granules; more preferably, the colorant is at least one of CuO, MnO2, and Co2O3.

[0012] Preferably, the chemical composition of the low-temperature dry granules includes, by mass percentage: SiO2: 50%~60%, Al2O3: 5%~10%, CaO: 10%~15%, MgO: 1%~3%, K2O: 1%~3%, Na2O: 1%~4%, ZnO: 5%~10%, BaO: 5%~10%, B2O3: 5%~10%. More preferably, the melting temperature of the low-temperature dry granules is 1080~1100℃.

[0013] Secondly, the present invention provides a ceramic slab with a decorative effect of different colors and shapes. The ceramic slab with the decorative effect of different colors and shapes comprises, in sequence, a body layer, an inkjet-printed ordinary ink pattern layer, a combined dry granule bundle layer, and a transparent glaze layer; the combined dry granule bundle layer contains the combined dry granule bundle obtained by the preparation method described above.

[0014] Thirdly, the present invention provides a method for preparing a ceramic slab with a decorative effect of different colors and shapes. The preparation method includes the following steps: applying a base glaze to the surface of a green body; inkjet printing a pattern of ordinary ink on the surface of the green body after applying the base glaze; positioning and applying the combined dry granule bundle prepared by the method on the surface of the green body after inkjet printing the pattern of ordinary ink; applying a transparent glaze to the surface of the green body after applying the combined dry granule bundle; and firing the green body after applying the transparent glaze to obtain the ceramic slab with the decorative effect of different colors and shapes.

[0015] Preferably, the chemical composition of the base glaze includes, by mass percentage: SiO2: 61%~65%, Al2O3: 19%~23%, K2O: 3%~4%, Na2O: 3.1%~3.8%, CaO: 0.5%~1%, MgO: 0.5%~1%, ZrO2: 3.2%~9.6%, and loss on ignition: 1.5%~2%.

[0016] Preferably, the base glaze is applied by spraying; the specific gravity of the base glaze is 1.3~1.5 g / cm³. 3 The glaze application rate is 500~600 g / m². 2 .

[0017] Preferably, the chemical composition of the transparent glaze includes, by mass percentage: loss on ignition: 5%~10%, SiO2: 45%~60%, Al2O3: 15%~20%, Fe2O3: 0.1%~0.3%, TiO2: 0.1%~0.3%, CaO: 5%~10%, MgO: 3%~6%, K2O: 0.5%~1%, Na2O: 2%~5%, ZnO: 2%~5%. More preferably, the melting temperature of the transparent glaze is 1130~1160℃.

[0018] Preferably, the transparent glaze is applied by spraying; the specific gravity of the transparent glaze is 1.55~1.6 g / cm³. 3 The glaze application rate is 500~600g / m². 2 .

[0019] Preferably, the firing temperature is 1170~1200℃ and the firing time is 40~60 min.

[0020] Thirdly, the present invention provides a ceramic slab with a decorative effect of different colors and shapes obtained by any of the preparation methods described above.

[0021] The present invention has the following beneficial effects: This invention prepares various dry granules into bundles using a special method. The fired product exhibits different pattern effects formed by the interweaving of various dry granules, resulting in richer patterns. In particular, the bundles prepared using low-temperature dry granules, basic dry granules, and / or colored dry granules exhibit enhanced decorative properties during firing, as the low-temperature dry granules erode other dry granules, forming special patterns such as crescent shapes. Attached Figure Description

[0022] Figure 1 This is a brick surface effect diagram of a combination of colored dry granules and low-temperature dry granules prepared in Example 1. Figure 2 This is a brick surface effect diagram of a combined dry particle bundle prepared by applying colored dry particles and basic dry particles in Example 2; Figure 3 This is a rendering of the brick surface as shown in Comparative Example 1. Detailed Implementation

[0023] The present invention is further illustrated by the following embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the present invention. Unless otherwise specified, all percentage contents refer to mass percentage contents.

[0024] The following exemplarily illustrates the preparation method of the ceramic slab with different colored and shaped patterns as described in this invention.

[0025] The sintered stone billet is pressed into a blank to obtain a blank. The blank forming method can be dry pressing. The chemical composition and raw material composition of the sintered stone billet are not limited, and commonly used sintered stone billets in the art can be used. As an example, the chemical composition of the sintered stone billet may include, by mass percentage: loss on ignition: 4%~4.8%, SiO2: 60%~65%, Al2O3: 20%~22%, Fe2O3: 0.1%~0.5%, TiO2: 0.05%~0.3%, CaO: 0.4%~0.5%, MgO: 0.5%~1%, K2O: 2%~3%, Na2O: 3%~4%.

[0026] The particle size distribution of the sintered stone billet affects the billet's forming performance. The particle size distribution of the sintered stone billet may include, by mass percentage: 20%~25% for particles larger than 30 mesh; 60%~70% for particles between 30 and 80 mesh; and ≤6% for particles smaller than 80 mesh. "Above 30 mesh" refers to the portion that remains on a 30-mesh sieve. "Below 80 mesh" refers to the portion that passes through an 80-mesh sieve. The moisture content of the sintered stone billet is preferably 8.5±3wt%.

[0027] The billet is dried. This drying can be carried out in a drying kiln.

[0028] Apply a base glaze to the dried body surface. A base glaze commonly used in the art can be used. For example, the chemical composition of the base glaze includes, by mass percentage: SiO2: 61%~65%, Al2O3: 19%~23%, K2O: 3%~4%, Na2O: 3.1%~3.8%, CaO: 0.5%~1%, MgO: 0.5%~1%, ZrO2: 3.2%~9.6%, and loss on ignition: 1.5%~2%.

[0029] The base glaze can be applied by spraying. As an example, the specific gravity of the base glaze is 1.3~1.5 g / cm³. 3 The glaze application rate is 500~600 g / m². 2 If the amount of base glaze applied is too low, it will not be able to cover the base color and defects of the body, and pinholes and bubbles will easily appear in the glaze layer. If the amount of base glaze applied is too high, the high moisture content of the body entering the kiln will cause the moisture to be removed too quickly, resulting in cracking of the body.

[0030] Dry the body after applying the base glaze.

[0031] A plain ink pattern is printed onto the surface of the blank after the base glaze is applied. The texture and color of the plain ink pattern can be adapted to meet specific requirements.

[0032] Prepare a bundle of combined dry granules. In optional embodiments, the bundle of combined dry granules is a bundle formed from at least one or two of basic dry granules, colored dry granules, and low-temperature dry granules. For example, the bundle of combined dry granules is a bundle of basic dry granules and colored dry granules, or a bundle of colored dry granules and low-temperature dry granules, or a bundle of different colored dry granules, or a bundle of basic dry granules and low-temperature dry granules, or a bundle of basic dry granules, colored dry granules, and low-temperature dry granules. Preferably, the bundle of combined dry granules is a bundle formed from low-temperature dry granules and at least one of basic dry granules or colored dry granules. In some embodiments, the bundle of combined dry granules is a bundle formed from 30% to 60% by mass of basic dry granules and / or colored dry granules and 40% to 70% by mass of low-temperature dry granules.

[0033] In an optional embodiment, the mineral composition of the basic dry granules includes, by mass percentage: 5%~10% kaolin, 20%~30% zinc oxide, 45%~70% high-zinc and high-calcium frit, and 5%~15% wollastonite. The melting temperature of the basic dry granules can be 1100~1150℃. The chemical composition of the high-zinc and high-calcium frit includes, by mass percentage: SiO2: 50%~60%, Al2O3: 5%~10%, CaO: 5%~15% (preferably 10%~15%), MgO: 1%~5%, K2O: 3%~6%, Na2O: 1%~3%, and ZnO: 5%~10%. As an example, the chemical composition of the high-zinc, high-calcium frit includes, by mass percentage: Loss on ignition: 0-0.5% (e.g., 0.01%-0.5%), SiO2: 50%-60%, Al2O3: 5%-10%, CaO: 5%-15% (preferably 10%-15%), MgO: 1%-5%, K2O: 3%-6%, Na2O: 1%-3%, ZnO: 5%-10%. The high-zinc, high-calcium frit can reduce the high-temperature viscosity of the base dry granules and provide zinc. Due to the low surface tension of zinc, a difference in surface tension between the base dry granules and the transparent glaze is created, resulting in better fluidity.

[0034] The chemical composition of the basic dry granules may include, by mass percentage: SiO2: 45%~58%, Al2O3: 5%~10%, Fe2O3: 0.1%~0.3%, TiO2: 0.01%~0.03%, CaO: 5%~15%, MgO: 1%~3%, K2O: 3%~5%, Na2O: 1%~2%, ZnO: 25%~35%. In an optional embodiment, the chemical composition of the basic dry granules includes, by mass percentage: Loss on ignition: 0%~2% (e.g., 1%~2%), SiO2: 45%~58%, Al2O3: 5%~10%, Fe2O3: 0.1%~0.3%, TiO2: 0.01%~0.03%, CaO: 5%~15%, MgO: 1%~3%, K2O: 3%~5%, Na2O: 1%~2%, ZnO: 25%~35%.

[0035] In an optional embodiment, the colored dry granules comprise base dry granules and a colorant. The colorant includes, but is not limited to, CuO, MnO2, Co2O3, etc. The amount of colorant added can be 0.5% to 2% of the base dry granules.

[0036] The chemical composition of the low-temperature dry granules may include, by mass percentage: SiO2: 50%~60%, Al2O3: 5%~10%, CaO: 10%~15%, MgO: 1%~3%, K2O: 1%~3%, Na2O: 1%~4%, ZnO: 5%~10%, BaO: 5%~10%, B2O3: 5%~10%. In an optional embodiment, the chemical composition of the low-temperature dry granules includes, by mass percentage: Loss on ignition: 0~0.5% (e.g., 0.01%~0.5%), SiO2: 50%~60%, Al2O3: 5%~10%, CaO: 10%~15%, MgO: 1%~3%, K2O: 1%~3%, Na2O: 1%~4%, ZnO: 5%~10%, BaO: 5%~10%, B2O3: 5%~10%. The melting temperature of low-temperature dry granules can be 1080~1100℃. If the melting temperature of low-temperature dry granules is too high, it will not be able to erode the base dry granules. If the melting temperature of low-temperature dry granules is too low, it will affect the quality of the glaze and cause pores.

[0037] The following method can be used to prepare combined dry granule bundles. The dry granule mineral raw materials are uniformly mixed and melted at high temperature to obtain molten glass. The melting temperature can be 1200~1300℃. The molten glass is then used to produce glass fibers using a crucible drawing technique. For example, the molten glass is placed in a crucible, which is then placed on a drawing machine. The initial tension at the start of drawing is controlled by adjusting the speed of the drawing machine. After drawing begins, the tension is gradually increased, and necessary control is performed on the drawing machine to draw glass fibers of the desired diameter. The diameter of the glass fibers can be, for example, 0.5~2 mm. The glass fibers are then coated with a sizing agent. In an optional embodiment, the sizing agent comprises, by mass percentage: 5%~10% PVA, 40%~60% water glass, 1%~2% defoamer, 0.3%~1% emulsifier, and 27%~50% water. The composition of PVA, water glass, defoamer, and emulsifier is not limited; commonly used reagents in the art can be used. In the optional technical solutions, the PVA is water-soluble polyvinyl alcohol with a degree of alcoholysis ≤95%; the modulus of the water glass is 2.6~3.3; the emulsifier includes, but is not limited to, one of OP-10, NP-10, Tween-80, and AEO-9. The preparation temperature of the sizing agent can be 50~80℃. The glass fibers of the dry granules are arranged in a specific design pattern and placed in a drying oven for heat treatment to achieve bundling of different dry granules. The purpose of heat treatment is to solidify the sizing agent. The heat treatment temperature can be 100~160℃, and the heat treatment time can be 1~5 hours. Then, the bundled dry granules are chopped to obtain combined dry granule bundles. The length of the combined dry granule bundles can be 0.2~0.5 mm.

[0038] The adhesive granules are applied by positioning and bundling them using an inkjet printer to create an adhesive pattern. The inkjet-printed pattern can utilize two inkjet channels, for example, each channel having a 100% grayscale value. This ensures the adhesive pattern has sufficient bonding strength to firmly bond the granules. After applying the granules using the adhesive granulator, excess granules are removed using a collection device.

[0039] A transparent glaze is applied to the surface of the blank after the combined dry granules are bundled. In an optional embodiment, the chemical composition of the transparent glaze includes, by mass percentage: loss on ignition: 5%~10%, SiO2: 45%~60%, Al2O3: 15%~20%, Fe2O3: 0.1%~0.3%, TiO2: 0.1%~0.3%, CaO: 5%~10%, MgO: 3%~6%, K2O: 0.5%~1%, Na2O: 2%~5%, ZnO: 2%~5%. The melting temperature of the transparent glaze can be 1130~1160℃. If the melting temperature is too high, the basic dry granules will remain granular. If the melting temperature is too low, pores will form on the glaze surface, resulting in poor surface quality.

[0040] The transparent glaze can be applied by spraying. For example, the specific gravity of the transparent glaze is 1.55~1.6 g / cm³. 3 The glaze application rate is 500~600 g / m². 2 .

[0041] The unglazed body is fired in a kiln to obtain a ceramic slab with decorative patterns of different colors and shapes. In an optional embodiment, the firing temperature is 1170~1200℃ and the firing time is 40~60 min. The unglazed body can be dried before firing.

[0042] After firing, the edges are ground. After grinding, the product is packaged and stored.

[0043] This invention prepares various dry granules into bundles using a special method. The fired product exhibits different pattern effects formed by the interweaving of various dry granules, resulting in richer patterns. In particular, the bundles prepared using low-temperature dry granules, basic dry granules, and / or colored dry granules exhibit enhanced decorative properties during firing, as the low-temperature dry granules erode other dry granules, forming special patterns such as crescent shapes.

[0044] The following examples further illustrate the present invention in detail. It should also be understood that the following examples are only for further explanation of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0045] Example 1

[0046] Methods for preparing ceramic slabs with decorative effects of different colors and shapes include: Step 1. Dry press the sintered stone blank to obtain a blank and then dry the blank.

[0047] Step 2. Apply a base glaze to the surface of the blank. The chemical composition of the base glaze includes, by mass percentage: SiO2: 62%, Al2O3: 20%, K2O: 3%, Na2O: 3.5%, CaO: 0.5%, MgO: 1%, ZrO2: 8.5%, and loss on ignition: 1.5%. The base glaze is applied by spraying. The specific gravity of the base glaze is 1.4 g / cm³. 3 Glazing amount is 550 g / m 2 .

[0048] Step 3. Dry the glazed body and then inkjet print a pattern in ordinary ink on the surface of the dried body.

[0049] Step 4. Print an adhesive pattern on the surface of the blank after inkjet printing a regular ink pattern. Use a dual-channel inkjet printer to print the adhesive pattern. The grayscale of the adhesive pattern in each channel is 100%. Then, apply a bundle of combined dry granules using a dry granule printer. After application, a collection device removes the excess bundle of combined dry granules. The bundle of combined dry granules consists of 50 wt% colored dry granules and 50 wt% base dry granules.

[0050] The mineral raw materials for the basic dry granules were uniformly mixed and melted at 1250℃. Glass fibers with a diameter of 1 mm were then drawn using a crucible and subsequently coated with sizing agent. The mineral composition of the basic dry granules included, by mass percentage: kaolin 5%, zinc oxide 25%, high-zinc-high-calcium frit 65%, and wollastonite 5%. The chemical composition of the high-zinc-high-calcium frit included, by mass percentage: loss on ignition: 0.2%, SiO2: 59.8%, Al2O3: 10%, CaO: 15%, MgO: 5%, K2O: 3%, Na2O: 1%, ZnO: 6%. The chemical composition of the basic dry granules included, by mass percentage: loss on ignition: 1%, SiO2: 49.88%, Al2O3: 8%, Fe2O3: 0.1%, TiO2: 0.02%, CaO: 6%, MgO: 1%, K2O: 3%, Na2O: 1%, and ZnO: 30%. The initial melting temperature of the basic dry granules is 1120℃.

[0051] The mineral raw materials for low-temperature dry granules were uniformly mixed and melted at 1250℃. Glass fibers with a diameter of 1 mm were then drawn using a crucible and subsequently coated with a sizing agent. The chemical composition of the low-temperature dry granules, by mass percentage, is as follows: Loss on ignition: 0.2%, SiO2: 54.8%, Al2O3: 7%, CaO: 11%, MgO: 2%, K2O: 1%, Na2O: 4%, ZnO: 5%, BaO: 10%, B2O3: 5%. The initial melting temperature of the low-temperature dry granules is 1090℃.

[0052] The sizing-treated base dry granules and low-temperature dry granules, along with their corresponding glass fibers, are arranged in a specific design pattern and placed in a drying oven for heat treatment to achieve bundling of different dry granules. The bundled dry granules are then chopped to obtain combined dry granule bundles. The length of the combined dry granule bundles is 0.5 mm. The heat treatment temperature is 150℃, and the time is 5 hours. The raw material composition of the sizing agent includes, by mass percentage: PVA 7%, water glass 53%, defoamer 1.5%, emulsifier 0.5%, and water 38%. PVA is water-soluble polyvinyl alcohol with a degree of alcoholysis ≤95%. The water glass modulus is 2.6. The emulsifier is Tween-80. The preparation temperature of the sizing agent is 80℃.

[0053] Step 5. Apply a transparent glaze to the surface of the body with the combined dry granule glaze. The chemical composition of the transparent glaze includes, by mass percentage: loss on ignition: 5%, SiO2: 53.8%, Al2O3: 15%, Fe2O3: 0.1%, TiO2: 0.1%, CaO: 10%, MgO: 5%, K2O: 1%, Na2O: 5%, ZnO: 5%. The transparent glaze is applied by spraying. The specific gravity of the transparent glaze is 1.55 g / cm³. 3 Glazing amount is 550 g / m 2The initial melting temperature of the transparent glaze is 1140℃.

[0054] Step 6. Firing. Dry the transparent glazed body and then fire it in a kiln. The firing temperature is 1180℃ and the firing time is 50 minutes.

[0055] Step 7. After firing, grind the edges, pack and store the product.

[0056] Figure 1 This is a rendering of the brick surface from Example 1. It can be seen that the low-temperature dry granules effectively erode the colored dry granules, creating a crescent-shaped effect with varying colors and shapes.

[0057] Example 2

[0058] It is basically the same as Example 1, except that the combined dry granule bundle is a combined dry granule bundle formed by 50% base dry granules and 50% colored dry granules.

[0059] Figure 2 This is a rendering of the brick surface from Example 2. It can be seen that the basic dry granules and the colored dry granules are mutually inert, but no erosion occurs between them, therefore no irregular shape effect is produced.

[0060] Comparative Example 1 The process is essentially the same as in Example 1, except that the chemical composition of the transparent glaze includes, by mass percentage: loss on ignition: 4.78%, SiO2: 55%, Al2O3: 20%, Fe2O3: 0.2%, TiO2: 0.02%, CaO: 5%, MgO: 3%, K2O: 5%, Na2O: 5%, ZnO: 2%. The initial melting temperature of the transparent glaze is 1180℃.

[0061] Figure 3 The image shows the brick surface effect of Comparative Example 1. Due to the high melting temperature and viscosity of the transparent glaze, the basic dry particles cannot be spread, resulting in the dry particles remaining granular on the fired brick surface and failing to generate irregular patterns.

[0062] Comparative Example 2 The composition is basically the same as in Example 1, except that the chemical composition of the low-temperature dry granules includes, by mass percentage: loss on ignition: 0.5%, SiO2: 54.5%, Al2O3: 15%, CaO: 5%, MgO: 3%, K2O: 1%, Na2O: 5%, ZnO: 2%, BaO: 10%, B2O3: 4%. The initial melting temperature of the low-temperature dry granules is 1140℃.

[0063] In this comparative example, the low-temperature dry granules have a higher melting temperature, which prevents them from effectively eroding the colored dry granules and thus prevents the formation of special irregular patterns.

Claims

1. A method for preparing combined dry granule bundles, characterized in that, The preparation method includes: uniformly mixing dry granule mineral raw materials and then melting them at high temperature to obtain glass melt; drawing the glass melt into glass wires using crucible drawing technology; applying a sizing treatment to the glass wires; arranging the sizing-treated dry granule glass wires according to a design pattern and then heat-treating them to obtain dry granule bundles; and shaving the dry granule bundles to obtain combined dry granule bundles; wherein the combined dry granule bundles are formed from at least two of the following: basic dry granules, colored dry granules, and low-temperature dry granules.

2. The preparation method according to claim 1, characterized in that, The raw material composition of the sizing agent in the sizing process includes, by mass percentage: PVA 5%~10%, water glass 40%~60%, defoamer 1%~2%, emulsifier 0.3%~1%, and water 27%~50%.

3. The preparation method according to claim 1, characterized in that, The heat treatment temperature is 100~160℃, and the heat treatment time is 1~5h.

4. The preparation method according to claim 1, characterized in that, The melting temperature of basic dry granules is 1100~1150℃, and the melting temperature of low-temperature dry granules is 1080~1100℃.

5. The preparation method according to claim 4, characterized in that, The mineral composition of the basic dry granules includes, by mass percentage: kaolin 5%~10%, zinc oxide 20%~30%, high zinc and high calcium frit 45%~70%, and wollastonite 5%~15%; among which, the chemical composition of the high zinc and high calcium frit includes, by mass percentage: SiO2: 50%~60%, Al2O3: 5%~10%, CaO: 5%~15%, MgO: 1%~5%, K2O: 3%~6%, Na2O: 1%~3%, and ZnO: 5%~10%.

6. The preparation method according to claim 5, characterized in that, The chemical composition of the basic dry granules includes, by mass percentage: SiO2: 45%~58%, Al2O3: 5%~10%, Fe2O3: 0.1%~0.3%, TiO2: 0.01%~0.03%, CaO: 5%~15%, MgO: 1%~3%, K2O: 3%~5%, Na2O: 1%~2%, ZnO: 25%~35%.

7. The preparation method according to claim 4, characterized in that, The colored dry granules comprise base dry granules and a colorant; the colorant accounts for 0.5% to 2% of the mass of the base dry granules.

8. The preparation method according to claim 4, characterized in that, The chemical composition of the low-temperature dry granules includes, by mass percentage: SiO2: 50%~60%, Al2O3: 5%~10%, CaO: 10%~15%, MgO: 1%~3%, K2O: 1%~3%, Na2O: 1%~4%, ZnO: 5%~10%, BaO: 5%~10%, B2O3: 5%~10%.

9. A ceramic slab with decorative effects of different colors and shapes, characterized in that, The ceramic slab with different colored and shaped patterns includes a body layer, an inkjet-printed ordinary ink pattern layer, a combined dry granule bundle layer, and a transparent glaze layer arranged in sequence; the combined dry granule bundle layer contains a combined dry granule bundle obtained by the preparation method according to any one of claims 1 to 8.

10. A method for preparing a ceramic slab with a decorative effect of different colors and shapes, characterized in that, The preparation method includes the following steps: applying a base glaze to the surface of the green body; inkjet printing a pattern of ordinary ink on the surface of the green body after applying the base glaze; positioning and applying the combined dry granule bundles obtained according to any one of claims 1 to 8 on the surface of the green body after inkjet printing the pattern of ordinary ink; applying a transparent glaze to the surface of the green body after applying the combined dry granule bundles; and firing the green body after applying the transparent glaze to obtain the ceramic slab with the decorative effect of different colors and shapes.

11. The preparation method according to claim 10, characterized in that, The chemical composition of the base glaze includes, by mass percentage: SiO2: 61%~65%, Al2O3: 19%~23%, K2O: 3%~4%, Na2O: 3.1%~3.8%, CaO: 0.5%~1%, MgO: 0.5%~1%, ZrO2: 3.2%~9.6%, and loss on ignition: 1.5%~2%.

12. The preparation method according to claim 10, characterized in that, The base glaze is applied by spraying; the specific gravity of the base glaze is 1.3~1.5 g / cm³. 3 The glaze application rate is 500~600 g / m². 2 .

13. The preparation method according to claim 10, characterized in that, The chemical composition of the transparent glaze includes, by mass percentage: loss on ignition: 5%~10%, SiO2: 45%~60%, Al2O3: 15%~20%, Fe2O3: 0.1%~0.3%, TiO2: 0.1%~0.3%, CaO: 5%~10%, MgO: 3%~6%, K2O: 0.5%~1%, Na2O: 2%~5%, ZnO: 2%~5%.

14. The preparation method according to claim 10, characterized in that, The transparent glaze is applied by spraying; its specific gravity is 1.55~1.6 g / cm³. 3 The glaze application rate is 500~600 g / m². 2 .

15. The preparation method according to claim 10, characterized in that, The firing temperature is 1170~1200℃, and the firing time is 40~60 min.

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