Preparation method of low-silicon artificial stone plate

Abstract

The invention discloses a preparation method of a low-silicon artificial stone plate, which comprises the following steps: S1, uniformly mixing sintered sand, a first binder, a coupling agent, a curing agent and titanium dioxide to obtain a first mixture; wherein the dosage ratio of the sintered sand to the first adhesive to the titanium dioxide is 100g: (8-13g): (0.3-0.5 g), the first adhesive is unsaturated polyester resin, the weight of the coupling agent is 0.5-1.5% of that of the unsaturated polyester resin, and the weight of the curing agent is 0.8-2.0% of that of the unsaturated polyester resin; s2, the first mixture is subjected to hot press molding, and a plate blank is obtained; s3, the plate blank is dried at the temperature of 80-90 DEG C, and a semi-finished product is obtained; s4, the semi-finished product is subjected to grinding, polishing and cutting forming, and the low-silicon artificial stone plate is obtained; according to the artificial stone plate prepared by the invention, the sintered sand fired by the feldspar powder is used as a main raw material to replace common quartz particles or silica sand raw materials, so that the content of silicon dioxide in the artificial stone plate is remarkably reduced; and the compression strength and the wear resistance of the artificial stone plate prepared by the invention meet related standards.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial stone plates, and in particular to a preparation method of a low-silicon artificial stone plate. Background Art

[0002] With socioeconomic development, the market demand for processed natural stone for decorative purposes is growing. However, the continuous mining of stone leads to environmental pollution and resource waste, which is detrimental to the sustainable development of natural resources. Artificial stone is primarily made from broken pieces of natural marble, granite, or waste glass, mixed with a certain amount of binding material. Compared to natural stone, artificial stone has lower mechanical strength, but is resistant to corrosion and high temperatures.

[0003] Artificial quartz slabs are the most popular type of artificial stone, widely used in interior and exterior decoration. Existing artificial quartz slabs are mostly made with quartz particles or silica sand as the primary filler, optionally with additives. These slabs are then mixed with unsaturated polyester resin, molded, and cured. However, quartz (silicon dioxide) dust has a serious drawback: prolonged inhalation can cause silicosis, resulting in permanent lung scarring. Furthermore, unsaturated polyester resins have poor heat resistance, making them incompatible with high-temperature sintering during the production of artificial quartz slabs, resulting in limited mechanical strength.

[0004] Therefore, we need to design a preparation method of low-silicon artificial stone panels to solve the above problems. Summary of the Invention

[0005] According to one aspect of the present invention, a method for preparing a low-silicon artificial stone plate is provided, comprising the following steps: S1. Evenly mix sintered sand, a first binder, a coupling agent, a curing agent, and titanium dioxide to obtain a first mixture; The sintered sand, the first binder, and the titanium dioxide are used in a ratio of 100 g: 8-13 g: 0.3-0.5 g. The first binder is an unsaturated polyester resin, the weight of the coupling agent is 0.5-1.5% of the unsaturated polyester resin, and the weight of the curing agent is 0.8-2.0% of the unsaturated polyester resin. S2, hot pressing the first mixed material to obtain a slab; S3, drying the slab at a temperature of 80-90°C to obtain a semi-finished product; S4. The semi-finished product is ground, polished, cut and shaped to obtain low-silicon artificial stone slabs.

[0006] In some embodiments, in step S1, the method for preparing sintered sand includes the following steps: (1) Using feldspar powder as raw material, drying it to a moisture content of less than 1%, then removing iron with high gradient electrolysis, and then ball milling it to a particle size of 150-200 mesh to obtain a ground raw material; (2) uniformly mixing the ground raw material and the second binder to obtain a second mixed material; the amount ratio of the raw material to the second binder is 100g:5-10g; (3) Using a 1000T press, the second mixture is pressed into shape to obtain a brick; (4) Place multiple bricks on a pad and send them into a roller kiln for high-temperature sintering to obtain bricks; (5) The bricks are fed into the water crushing system and crushed into 5-10 mm particles; (6) The crushed particles are ball-milled to obtain sintered sand with a particle size of 40-120 mesh.

[0007] In some embodiments, in step (1), the particle size of the feldspar powder is 40-120 mesh, and the feldspar powder is white feldspar powder.

[0008] In some embodiments, in step (1), the feldspar powder is obtained by crushing and grinding feldspar ore, wherein the feldspar ore comes from Yichun, Jiangxi Province, and the main components of the feldspar ore are potassium feldspar, sodium feldspar and calcium feldspar, and contain a small amount of silicon dioxide.

[0009] In some embodiments, in step (2), the method for preparing the second binder comprises the following steps: 1) Add hydroquinone, mercaptopropionic acid, and p-toluenesulfonic acid to a toluene solvent, purge with nitrogen, and heat to reflux while stirring. Continue stirring and reacting for 4-6 hours. Then, add aqueous ammonia solution dropwise while stirring until the pH reaches 7-8. After the reaction, cool the reaction product to room temperature, wash, and allow it to stand for stratification. Dry the organic phase and vacuum filter it. Then, rotary evaporate the filtrate to remove the solvent to obtain product A. The ratio of hydroquinone, mercaptopropionic acid, p-toluenesulfonic acid and toluene is 0.1 mol: 0.23-0.25 mol: 1-1.5 g: 85-95 mL, and the mass fraction of the ammonia solution is 25-27%. 2) Add biphenyl dichloride and thiodiphenylamine to a toluene solvent, and add glycidyl methacrylate dropwise with stirring at 73-75°C. Continue stirring and react for 23-28 hours after the addition is complete. After the reaction is complete, cool the reaction product to room temperature, wash and extract, and then distill the extract under reduced pressure to remove the solvent to obtain product B; The ratio of biphenyl dichloride, thiodiphenylamine, glycidyl methacrylate, and toluene is 0.1 mol: 0.3-0.5 g: 0.23-0.25 mol: 105-115 mL; 3) Add product B, acrylic acid, and potassium carbonate to N,N-dimethylformamide solvent and stir at 73-75°C for 23-28 hours. After the reaction, cool the reaction product to room temperature, wash, and then dry the organic phase and remove the solvent by rotary evaporation to obtain product C; The ratio of the product B, acrylic acid, potassium carbonate and N,N-dimethylformamide is 0.1 mol: 0.23-0.25 mol: 12.5-13.5 g: 85-95 mL. 4) Add product C, product A, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and react for 6-8 hours. After the reaction is completed, cool the reaction product to room temperature and then remove the solvent by rotary evaporation to obtain product D; Wherein, the usage ratio of the product C, product A, triethylamine and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL; 5) Add product D, glycidyl methacrylate, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and reacting for 23-28 hours. After the reaction is completed, cool the reaction product to room temperature and then rotary evaporate to remove the solvent to obtain a second binder; The usage ratio of the product D, glycidyl methacrylate, triethylamine and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL.

[0010] In some embodiments, in step (4), the material of the backing plate is mullite, cordierite or reaction-bonded silicon carbide.

[0011] In some embodiments, in step (4), the high-temperature sintering temperature is 1280-1350°C.

[0012] In some embodiments, in step S1, the coupling agent is an organosilane coupling agent, and the curing agent is tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxybenzoate, or benzoyl peroxide.

[0013] In some embodiments, in step S1, the particle size of the titanium dioxide is 0.1-0.5 μm, and the whiteness of the titanium dioxide is greater than 90 degrees.

[0014] According to another aspect of the present invention, there is provided an application of the method for preparing the low-silicon artificial stone plate as described above, wherein the method is applied in the field of coatings.

[0015] Beneficial effects of the present invention: 1. The artificial stone panels produced by this invention utilize sintered sand made from feldspar powder as their primary raw material, replacing common quartz particles or silica sand, significantly reducing the silica content. Furthermore, the low-silicon artificial stone panels produced using this method exhibit high whiteness, strong hardness, and meet relevant standards for compressive strength and wear resistance.

[0016] 2. The present invention employs two binders. When sintered sand is prepared from feldspar powder, the second binder used is a high-temperature resistant organic resin. The sintering temperature is controlled at 1280-1350°C, allowing the feldspar powder to completely melt, making the sintered sand denser and more stable, thereby improving the mechanical strength and wear resistance of the board. When artificial stone boards are prepared from sintered sand, the first binder used is an unsaturated polyester resin. The slabs do not need to be fired and can be dried at 80-90°C. In addition, the amount of unsaturated polyester resin used is small, saving resin. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the embodiments.

[0018] The present invention provides a method for preparing a low-silicon artificial stone plate, comprising the following steps: S1. Evenly mix sintered sand, a first binder, a coupling agent, a curing agent, and titanium dioxide to obtain a first mixture; The amount ratio of sintered sand, first binder, and titanium dioxide is 100g:8-13g:0.3-0.5g. The first binder is unsaturated polyester resin, the weight of the coupling agent is 0.5-1.5% of the unsaturated polyester resin, and the weight of the curing agent is 0.8-2.0% of the unsaturated polyester resin. The coupling agent is an organic silane coupling agent, and the curing agent is tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxybenzoate, or benzoyl peroxide. The particle size of the titanium dioxide is 0.1-0.5μm, and the whiteness of the titanium dioxide is greater than 90 degrees. S2, hot pressing the first mixed material to obtain a slab; S3, drying the slab at a temperature of 80-90°C to obtain a semi-finished product; S4. The semi-finished product is ground, polished, cut and shaped to obtain low-silicon artificial stone slabs.

[0019] In the above step S1, the method for preparing sintered sand comprises the following steps: (1) Using feldspar powder as raw material, drying it to a moisture content of less than 1%, then removing iron with high gradient electrolysis, and then ball milling it to a particle size of 150-200 mesh to obtain a ground raw material; Feldspar powder is made by crushing and grinding raw feldspar ore from Yichun, Jiangxi Province. The main components of raw feldspar ore are potassium feldspar, sodium feldspar and calcium feldspar, with a small amount of silicon dioxide.

[0020] The feldspar powder has a particle size of 40-120 mesh and is white. Using a small particle size allows for more uniform mixing and more efficient sintering, requiring less energy. The resulting sintered sand also contains fewer defects, impurities, and unevenness, resulting in improved compressive strength and wear resistance for the sheet. Using white feldspar powder reduces the amount of titanium dioxide used and produces sheets with a higher whiteness.

[0021] (2) Evenly mixing the ground raw material and the second binder to obtain a second mixed material; the amount ratio of the raw material to the second binder is 100g: 5-10g; (3) Using a 1000T press, the second mixture is pressed into shape to obtain a brick; (4) Place multiple bricks on a pad and send them into a roller kiln for high-temperature sintering to obtain bricks; The material of the backing plate is mullite, cordierite or reaction-sintered silicon carbide. In this embodiment, mullite, cordierite or reaction-sintered silicon carbide plates are used as backing plates, and a single layer is loaded on the plate. Mullite, cordierite or reaction-sintered silicon carbide plates have good thermal conductivity and energy saving, which can improve production efficiency and ensure that the temperature of the bricks in the kiln is uniform. Using mullite, cordierite or reaction-sintered silicon carbide plates as backing plates can also improve the refractory performance of the roller kiln, enhance the heat resistance and wear resistance of the roller kiln, and extend the service life of the equipment. In addition, the energy consumption of the roller kiln is lower than that of the tunnel kiln. Except for the heat absorption of the bricks and the heat dissipation of the kiln body, there is no other energy consumption. The overall investment of the roller kiln is lower than that of the tunnel kiln, the floor space is small, the output is large, the brick material quality is excellent, and the later conversion rate is high.

[0022] The high-temperature sintering temperature is 1280-1350°C. When the sintering temperature is controlled at 1280-1350°C, the feldspar powder can be completely melted, making the sintered sand more dense and stable, thereby improving the mechanical strength and wear resistance of the plate; however, when the sintering temperature is too high, it will increase the brittleness of the plate.

[0023] (5) The bricks are fed into the water crushing system and crushed into 5-10 mm particles; (6) The crushed particles are ball-milled to obtain sintered sand with a particle size of 40-120 mesh.

[0024] In the above step (2), the preparation method of the second binder comprises the following steps: 1) Add hydroquinone, mercaptopropionic acid, and p-toluenesulfonic acid to a toluene solvent, purge with nitrogen, and heat to reflux while stirring. Continue stirring and reacting for 4-6 hours. Then, add aqueous ammonia solution dropwise while stirring until the pH reaches 7-8. After the reaction, cool the reaction product to room temperature, wash, and allow it to stand for stratification. Dry the organic phase and vacuum filter it. Then, rotary evaporate the filtrate to remove the solvent to obtain product A. The dosage ratio of hydroquinone, mercaptopropionic acid, p-toluenesulfonic acid and toluene is 0.1 mol: 0.23-0.25 mol: 1-1.5 g: 85-95 mL, and the mass fraction of the ammonia solution is 25-27%. Reaction principle: Through the reaction of hydroquinone and mercaptopropionic acid, the hydroxyl group on hydroquinone and the carboxyl group on mercaptopropionic acid undergo esterification reaction, thereby introducing a thiol group to obtain product A.

[0025] 2) Add biphenyl dichloride and thiodiphenylamine to a toluene solvent, and add glycidyl methacrylate dropwise with stirring at 73-75°C. Continue stirring and react for 23-28 hours after the addition is complete. After the reaction is complete, cool the reaction product to room temperature, wash and extract, and then distill the extract under reduced pressure to remove the solvent to obtain product B; The usage ratio of biphenyl dichloride, thiodiphenylamine, glycidyl methacrylate, and toluene is 0.1 mol: 0.3-0.5 g: 0.23-0.25 mol: 105-115 mL; Reaction principle: Biphenyl dichloride reacts with glycidyl methacrylate. The epoxy group on glycidyl methacrylate is ring-opened to form a hydroxyl group, which undergoes a nucleophilic substitution reaction with the chlorine atom on biphenyl dichloride, thereby introducing an alkenyl group to obtain product B.

[0026] 3) Add product B, acrylic acid, and potassium carbonate to N,N-dimethylformamide solvent and stir at 73-75°C for 23-28 hours. After the reaction, cool the reaction product to room temperature, wash, and then dry the organic phase and remove the solvent by rotary evaporation to obtain product C; The ratio of product B, acrylic acid, potassium carbonate, and N,N-dimethylformamide is 0.1 mol: 0.23-0.25 mol: 12.5-13.5 g: 85-95 mL. Reaction principle: Product B reacts with acrylic acid, and the hydroxyl group on product B reacts with the carboxyl group on acrylic acid to form an ester group, while an alkenyl group is introduced to obtain product C containing a large number of alkenyl groups.

[0027] 4) Add product C, product A, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and react for 6-8 hours. After the reaction is completed, cool the reaction product to room temperature and then remove the solvent by rotary evaporation to obtain product D; Among them, the usage ratio of product C, product A, triethylamine, and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL; Reaction principle: Through the reaction of product C and product A, the alkenyl group on product C undergoes a thiol-alkenyl click reaction with the thiol group on product A, thereby introducing a large number of thiol groups to obtain product D.

[0028] 5) Add product D, glycidyl methacrylate, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and reacting for 23-28 hours. After the reaction is completed, cool the reaction product to room temperature and then rotary evaporate to remove the solvent to obtain a second binder; The usage ratio of product D, glycidyl methacrylate, triethylamine and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL.

[0029] Reaction principle: The thiol group on the product D undergoes a thiol-ene click reaction with glycidyl methacrylate again, thereby introducing a large number of epoxy groups to obtain a second adhesive.

[0030] The molecular structure of this binder contains a large number of epoxy groups. Due to the chemical activity of the epoxy groups, it is easy to open the ring and cross-link to form a network structure. At the same time, it can be adsorbed on the feldspar powder. After mixing and cross-linking, it can enhance the bonding force between the feldspar powders, thereby improving the mechanical strength of the sintered sand.

[0031] In this embodiment, the second binder used is an organic resin that is resistant to high-temperature sintering. In other embodiments, the second binder may also be carboxymethyl cellulose (CMC), bentonite, and / or polyvinyl alcohol; the second binder may also be one or a combination of polyacrylamide, methyl cellulose, or sesbania powder.

[0032] The present invention also provides an application of the method for preparing the low-silicon artificial stone plate as described above, and the preparation method is applied in the field of coatings. Example 1 The present invention provides a method for preparing a low-silicon artificial stone plate, comprising the following steps:

[0033] S1. Evenly mix sintered sand, a first binder, a coupling agent, a curing agent, and titanium dioxide to obtain a first mixture; The dosage ratio of sintered sand, first binder and titanium dioxide is 100g:8g:0.3g, the first binder is unsaturated polyester resin, the weight of coupling agent is 0.5-1.5% of the unsaturated polyester resin, and the weight of curing agent is 0.8-2.0% of the unsaturated polyester resin; the coupling agent is organic silane coupling agent, and the curing agent is tert-butyl perbenzoate; the particle size of titanium dioxide is 0.1-0.5μm, and the whiteness of titanium dioxide is greater than 90 degrees.

[0034] S2, hot pressing the first mixed material to obtain a slab; S3, drying the slab at a temperature of 80-90°C to obtain a semi-finished product; S4. The semi-finished product is ground, polished, cut and shaped to obtain low-silicon artificial stone slabs.

[0035] In the above step S1, the method for preparing sintered sand comprises the following steps: (1) Using feldspar powder as raw material, drying it to a moisture content of less than 1%, then removing iron with high gradient electrolysis, and then ball milling it to a particle size of 150-200 mesh to obtain a ground raw material; The feldspar powder has a particle size of 40-120 mesh and is white. It is made by crushing and grinding raw feldspar ore, sourced from Yichun, Jiangxi Province. The main components of the raw feldspar ore are potassium feldspar, sodium feldspar, and calcium feldspar, with a small amount of silica.

[0036] (2) Evenly mixing the ground raw material and the second binder to obtain a second mixed material; the amount ratio of the raw material to the second binder is 100g:10g; (3) Using a 1000T press, the second mixture is pressed into shape to obtain a brick; (4) Place multiple bricks on a reaction-sintered silicon carbide plate, load them in a single layer, and send them into a roller kiln for high-temperature sintering at a temperature of 1280°C to obtain bricks; (5) The bricks are fed into the water crushing system and crushed into 5-10 mm particles; (6) The crushed particles are ball-milled to obtain sintered sand with a particle size of 40-120 mesh.

[0037] In the above step (2), the preparation method of the second binder comprises the following steps: 1) Add hydroquinone, mercaptopropionic acid, and p-toluenesulfonic acid to a toluene solvent, purge with nitrogen, and heat to reflux while stirring. Continue stirring and reacting for 4-6 hours. Then, add aqueous ammonia solution dropwise while stirring until the pH reaches 7-8. After the reaction, cool the reaction product to room temperature, wash, and allow it to stand for stratification. Dry the organic phase and vacuum filter it. Then, rotary evaporate the filtrate to remove the solvent to obtain product A. The dosage ratio of hydroquinone, mercaptopropionic acid, p-toluenesulfonic acid and toluene is 0.1 mol: 0.23-0.25 mol: 1-1.5 g: 85-95 mL, and the mass fraction of the ammonia solution is 25-27%. 2) Add biphenyl dichloride and thiodiphenylamine to a toluene solvent, and add glycidyl methacrylate dropwise with stirring at 73-75°C. Continue stirring and react for 23-28 hours after the addition is complete. After the reaction is complete, cool the reaction product to room temperature, wash and extract, and then distill the extract under reduced pressure to remove the solvent to obtain product B; The usage ratio of biphenyl dichloride, thiodiphenylamine, glycidyl methacrylate, and toluene is 0.1 mol: 0.3-0.5 g: 0.23-0.25 mol: 105-115 mL; 3) Add product B, acrylic acid, and potassium carbonate to N,N-dimethylformamide solvent and stir at 73-75°C for 23-28 hours. After the reaction, cool the reaction product to room temperature, wash, and then dry the organic phase and remove the solvent by rotary evaporation to obtain product C; The ratio of product B, acrylic acid, potassium carbonate, and N,N-dimethylformamide is 0.1 mol: 0.23-0.25 mol: 12.5-13.5 g: 85-95 mL. 4) Add product C, product A, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and react for 6-8 hours. After the reaction is completed, cool the reaction product to room temperature and then remove the solvent by rotary evaporation to obtain product D; Among them, the usage ratio of product C, product A, triethylamine, and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL; 5) Add product D, glycidyl methacrylate, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and reacting for 23-28 hours. After the reaction is completed, cool the reaction product to room temperature and then rotary evaporate to remove the solvent to obtain a second binder; The usage ratio of product D, glycidyl methacrylate, triethylamine and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL. Example 2

[0038] The difference between Example 2 and Example 1 is that the usage ratio of sintered sand, the first binder, and titanium dioxide is 100g:10.5g:0.4g; the usage ratio of feldspar powder raw material and the second binder is 100g:7.5g, and the sintering temperature is 1315°C. Example 3

[0039] The difference between Example 3 and Example 1 is that the usage ratio of sintered sand, the first binder, and titanium dioxide is 100g:13g:0.5g; the usage ratio of feldspar powder raw material and the second binder is 100g:5g, and the sintering temperature is 1350°C.

[0040] Comparative Example 1 The difference between Comparative Example 1 and Example 2 is that the sintering temperature is 1000°C.

[0041] Comparative Example 2 The difference between Comparative Example 2 and Example 2 is that the sintering temperature is 1600°C.

[0042] Comparative Example 3 The difference between Comparative Example 3 and Example 2 is that the second binder is not added.

[0043] Comparative Example 4 The difference between Comparative Example 4 and Example 2 is that epoxy resin E-44 is used instead of the second binder.

[0044] The compressive strength and wear resistance of the artificial stone slabs prepared in Examples 1-3 and Comparative Examples 1-4 were measured in accordance with JC / T 908-2012 Artificial Stone. The results are shown in Table 1.

[0045] Compression strength MPa <![CDATA[Wear resistance mm 3 > Example 1 182 273 Example 2 193 240 Example 3 185 262 Comparative Example 1 146 318 Comparative Example 2 143 324 Comparative Example 3 140 328 Comparative Example 4 153 293 The results show that the compressive strength of Examples 1-3 is greater than 150 MPa and the wear resistance is less than 300 mm. 3 , meeting the relevant standards, with Example 2 being the better choice. The compressive strength and wear resistance of the artificial stone boards prepared in Comparative Examples 1-2 are significantly inferior to those in Examples 1-3, indicating that sintering sand at too high a sintering temperature or too low a sintering temperature will affect the compressive strength and wear resistance of the boards. Comparative Examples 3-4 illustrate that the addition of epoxy resin E-44 or a second binder can enhance the mechanical strength of the sintered sand, thereby improving the compressive strength and wear resistance of the boards, with the second binder of the present invention achieving the best effect.

[0046] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A method for preparing a low-silicon artificial stone plate, characterized in that: The following steps are involved: S1. Evenly mix sintered sand, a first binder, a coupling agent, a curing agent, and titanium dioxide to obtain a first mixture; The sintered sand, the first binder, and the titanium dioxide are used in a ratio of 100 g: 8-13 g: 0.3-0.5 g. The first binder is an unsaturated polyester resin, the weight of the coupling agent is 0.5-1.5% of the unsaturated polyester resin, and the weight of the curing agent is 0.8-2.0% of the unsaturated polyester resin. S2, hot pressing the first mixed material to obtain a slab; S3, drying the slab at a temperature of 80-90°C to obtain a semi-finished product; S4. The semi-finished product is ground, polished, cut and shaped to obtain low-silicon artificial stone slabs.

2. The method for preparing a low-silicon artificial stone plate according to claim 1, characterized in that: In step S1, the method for preparing sintered sand includes the following steps: (1) Using feldspar powder as raw material, drying it to a moisture content of less than 1%, then removing iron with high gradient electrolysis, and then ball milling it to a particle size of 150-200 mesh to obtain a ground raw material; (2) uniformly mixing the ground raw material and the second binder to obtain a second mixed material; the amount ratio of the raw material to the second binder is 100g:5-10g; (3) Using a 1000T press, the second mixture is pressed into shape to obtain a brick; (4) Place multiple bricks on a pad and send them into a roller kiln for high-temperature sintering to obtain bricks; (5) The bricks are fed into the water crushing system and crushed into 5-10 mm particles; (6) The crushed particles are ball-milled to obtain sintered sand with a particle size of 40-120 mesh.

3. The method for preparing a low-silicon artificial stone plate according to claim 2, characterized in that: In the step (1), the particle size of the feldspar powder is 40-120 mesh, and the feldspar powder is white feldspar powder.

4. The method for preparing a low-silicon artificial stone plate according to claim 2, characterized in that: In the step (1), the feldspar powder is obtained by crushing and grinding feldspar ore, wherein the feldspar ore comes from Yichun, Jiangxi Province, and the main components of the feldspar ore are potassium feldspar, sodium feldspar and calcium feldspar, and contain a small amount of silicon dioxide.

5. The method for preparing a low-silicon artificial stone plate according to claim 2, characterized in that: In step (2), the preparation method of the second binder comprises the following steps: 1) Add hydroquinone, mercaptopropionic acid, and p-toluenesulfonic acid to a toluene solvent, purge with nitrogen, and heat to reflux while stirring. Continue stirring and reacting for 4-6 hours. Then, add aqueous ammonia solution dropwise while stirring until the pH reaches 7-8. After the reaction, cool the reaction product to room temperature, wash, and allow it to stand for stratification. Dry the organic phase and vacuum filter it. Then, rotary evaporate the filtrate to remove the solvent to obtain product A. The ratio of hydroquinone, mercaptopropionic acid, p-toluenesulfonic acid and toluene is 0.1 mol: 0.23-0.25 mol: 1-1.5 g: 85-95 mL, and the mass fraction of the ammonia solution is 25-27%. 2) Add biphenyl dichloride and thiodiphenylamine to a toluene solvent, and add glycidyl methacrylate dropwise with stirring at 73-75°C. Continue stirring and react for 23-28 hours after the addition is complete. After the reaction is complete, cool the reaction product to room temperature, wash and extract, and then distill the extract under reduced pressure to remove the solvent to obtain product B; The ratio of biphenyl dichloride, thiodiphenylamine, glycidyl methacrylate, and toluene is 0.1 mol: 0.3-0.5 g: 0.23-0.25 mol: 105-115 mL; 3) Add product B, acrylic acid, and potassium carbonate to N,N-dimethylformamide solvent and stir at 73-75°C for 23-28 hours. After the reaction, cool the reaction product to room temperature, wash, and then dry the organic phase and remove the solvent by rotary evaporation to obtain product C; The ratio of the product B, acrylic acid, potassium carbonate and N,N-dimethylformamide is 0.1 mol: 0.23-0.25 mol: 12.5-13.5 g: 85-95 mL. 4) Add product C, product A, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and react for 6-8 hours. After the reaction is completed, cool the reaction product to room temperature and then remove the solvent by rotary evaporation to obtain product D; Wherein, the usage ratio of the product C, product A, triethylamine and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL; 5) Add product D, glycidyl methacrylate, and triethylamine to toluene solvent, introduce nitrogen protection, and heat to reflux while stirring. Continue stirring and reacting for 23-28 hours. After the reaction is completed, cool the reaction product to room temperature and then rotary evaporate to remove the solvent to obtain a second binder; The usage ratio of the product D, glycidyl methacrylate, triethylamine and toluene is 0.1 mol: 0.45-0.48 mol: 0.47-0.5 mol: 130-150 mL.

6. The method for preparing a low-silicon artificial stone plate according to claim 2, characterized in that: In the step (4), the material of the backing plate is mullite, cordierite or reaction-bonded silicon carbide.

7. The method for preparing a low-silicon artificial stone plate according to claim 2, characterized in that: In the step (4), the high temperature sintering temperature is 1280-1350°C.

8. The method for preparing a low-silicon artificial stone plate according to claim 1, characterized in that: In step S1, the coupling agent is an organic silane coupling agent, and the curing agent is tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxybenzoate or benzoyl peroxide.

9. The method for preparing a low-silicon artificial stone plate according to claim 1, characterized in that: In step S1, the particle size of the titanium dioxide is 0.1-0.5 μm, and the whiteness of the titanium dioxide is greater than 90 degrees.

10. An application of the method for preparing a low-silicon artificial stone plate according to any one of claims 1 to 9, characterized in that: The preparation method is applied to the field of coatings.