A high-strength luxury stone material with natural texture and its preparation method

Abstract

This invention relates to the field of low-carbon technology, specifically to low-carbon building materials. Specifically, it discloses a high-strength luxury stone material with a natural texture and its preparation method. The luxury stone material comprises 25-35 parts feldspar, 20-30 parts waste glass scraps, 10-20 parts quartz sand, 8-15 parts kaolin, 3-5 parts zinc oxide, 2-4 parts strontium carbonate, 6-10 parts alumina, 5-10 parts calcite, 2-4 parts boric acid, 3-6 parts silicon nitride micropowder, 2.5-6 parts low-carbon additives, 2-4 parts composite nucleating agent, 1-3 parts fluorite, 2-4 parts soda ash, 0.3-0.8 parts antimony oxide, 0.5-1 part nano-cerium oxide, and 0.5-3 parts coloring oxide. The preparation method includes steps such as segmented melting atmosphere control, multi-stage temperature-controlled crystallization, and high-proportion waste recycling. The high-strength luxury stone material obtained by this invention has a flexural strength ≥650MPa, a fracture toughness ≥7.0MPa・m¹ / ², and an industrial solid waste utilization rate ≥30%, effectively solving the problems of low strength, poor color stability, and insufficient environmental protection of traditional imitation stone materials.

Description

Technical Field

[0001] This invention relates to the field of low-carbon technology, specifically to low-carbon building materials, and more specifically to a high-strength luxury stone material with natural-looking textures and its preparation method. Background Technology

[0002] Natural stone materials are in high demand in the high-end decoration field due to their unique natural textures and luxurious feel. However, natural stone has three major problems: First, resource scarcity. The reserves of high-quality natural luxury stones (such as marble and granite) are limited, and over-exploitation can easily lead to ecological damage. Second, performance shortcomings. The flexural strength of natural stone is generally lower than 300MPa, and the fracture toughness is lower than 3.0MPa·m. 1 / 2 It is susceptible to cracking from external impacts and has a high water absorption rate (≥0.3%), making it prone to moisture and deterioration with long-term use; thirdly, it is not environmentally friendly, with high energy consumption in the mining and processing of natural stone (approximately 800 kWh per ton of processing) and large carbon emissions (approximately 0.6 tCO2 per ton of carbon emissions).

[0003] Existing imitation stone materials are mostly made from waste glass and ceramic slag, but they still have obvious defects: (1) The high-temperature reinforcing components are not properly selected. For example, some schemes use cement as a reinforcing agent, which will completely decompose at high temperatures above 1400℃ (the phase transition temperature of the CaO-Al2O3-SiO2 system is ≤1200℃). Not only will it fail to strengthen the material, but it will also generate impurity gases, which will increase the porosity of the material. (2) The crystal nucleating agent is inefficient. Traditional TiO2 single crystal nucleating agent needs to be added at more than 5% to effectively crystallize. However, the composite crystal nucleating agent ratio is not designed properly, resulting in uneven crystal distribution and large fluctuations in material strength (deviation ≥15%). (3) The coloring stability is poor. The atmosphere parameters are not designed in combination with the valence state characteristics of the coloring oxides, such as Fe 3+ It is easily reduced to Fe under low oxygen partial pressure. 2+ (4) Insufficient low carbon content, the utilization rate of industrial solid waste is generally less than 20%, and low carbon fuels are not used, resulting in carbon emissions being reduced by less than 10% compared with traditional processes; (5) Lack of safety performance, some schemes do not control the radioactivity of raw materials, and there may be a risk of radiation exceeding the standard (more than 0.12 μSv / h). Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength luxury stone material with natural texture and its preparation method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, on the one hand, this invention provides a high-strength luxury stone material with a natural texture, comprising 25-35 parts feldspar, 20-30 parts waste glass scraps, 10-20 parts quartz sand, 8-15 parts kaolin, 3-5 parts zinc oxide, 2-4 parts strontium carbonate, 6-10 parts alumina, 5-10 parts calcite, 2-4 parts boric acid, 3-6 parts modified silicon nitride micropowder, 2.5-6 parts low-carbon additives, 2-4 parts composite nucleating agent, 1-3 parts fluorite, 2-4 parts soda ash, 0.3-0.8 parts antimony oxide, 0.5-1 part nano-cerium oxide, and 0.5-3 parts coloring oxide. The coloring oxide is one or more of iron oxide, chromium oxide, and cobalt oxide.

[0006] Preferably, the low-carbon additive is a mixture of steel slag powder, mineral powder modifier, silica fume and nano calcium carbonate in a mass ratio of (1.5-2.5):(1.5-2.5):(1.5-2.5):(0.8-1.2), wherein the steel slag powder and mineral powder modifier are both derived materials from industrial solid waste, and their particle size is ≤10μm.

[0007] Preferably, the composite nucleating agent is a mixture of titanium dioxide, zirconium oxide and yttrium oxide in a mass ratio of (2.5-3.5):(0.8-1.2):(0.8-1.2), with a particle size ≤5μm, and is subjected to ultrasonic dispersion treatment (power 300-500W, time 15-20min).

[0008] Preferably, the waste glass scraps have a particle size of 0.5-2mm, a SiO2 content of ≥70%, and are recycled building or electronic waste glass, with radioactive element content meeting the requirements for Class A decorative materials in GB 6566-2010.

[0009] Preferably, the modified silicon nitride micropowder has a particle size of 0.5-2 μm, a β phase content of ≥90%, and is surface modified with silane coupling agent KH-550. The amount of modifier used is 1-3% of the mass of silicon nitride, the modification temperature is 80-90℃, and the time is 2-3 hours.

[0010] On the other hand, the present invention also discloses a method for preparing a high-strength luxury stone material with imitation natural texture, comprising the following steps:

[0011] Waste glass scraps, steel slag powder, and mineral powder modifiers from low-carbon additives are sorted and impurities are removed. A combined process of "magnetic separation (removing metal impurities, iron removal rate ≥98%) + air separation (separating large slag lumps and carbon particles, particle size >10μm impurity removal rate ≥95%) + water washing (removing organic adhesives and soluble impurities, washing cleanliness ≥99%)" is adopted. The cleaned solid waste raw materials are dried at 105-110℃ for 4-6 hours (moisture content reduced to ≤0.5%), and then crushed to the specified particle size (0.5-2mm for waste glass, ≤10μm for steel slag powder and mineral powder modifiers) by jaw crusher and ball mill.

[0012] Feldspar, treated waste glass scraps, quartz sand, kaolin, zinc oxide, strontium carbonate, alumina, calcite, boric acid, modified silicon nitride micro powder, treated low-carbon additives, composite nucleating agent, fluorite, soda ash, antimony oxide, and 70% nano-cerium oxide are mixed and stirred (specifically, put into a planetary mixer and stir at 300-400 r / min for 20-30 min (mixing uniformity ≥95%)) to obtain the basic components. The coloring oxide and 30% nano-cerium oxide are stirred and dispersed under nitrogen protection (specifically, put into a high-speed disperser, purged with nitrogen (to prevent oxidation of the coloring oxide), and stirred at 1500-2000 r / min for 15-20 min (colorant dispersion particle size ≤2μm)) to obtain the texture-forming components.

[0013] First, a 3-5mm base component is laid inside the mold. Then, texture-forming components are laid according to the natural stone texture pattern (using 3D printing pre-lay technology, pattern accuracy ≤0.1mm). Finally, a 5-8mm base component is placed on top, followed by compaction. Specifically, a hydraulic press is used to apply pressure in stages (5-8MPa) to obtain a laminated material with a compaction density of 1.8-2.0g / cm³. 3 ;

[0014] The laminated material was subjected to segmented melting and temperature-controlled crystallization.

[0015] After the crystallized product is cooled to room temperature, it is cut, ground, and polished until the gloss level is ≥90° to obtain the high-strength luxury stone material with the imitation natural texture. The material is cut with a diamond saw blade (cutting accuracy ≤0.5mm), ground sequentially with 80#, 200#, 800#, and 1500# grinding wheels, and finally polished with a wool wheel (polishing pressure 0.8-1.2MPa, rotation speed 800-1000r / min).

[0016] Preferably, the segmented melting includes:

[0017] First, raise the temperature to 1250-1350℃ at a rate of 5-8℃ / min and hold for 1-2 hours, with an oxygen partial pressure of 10. -8 -10 -9 MPa;

[0018] Then raise the temperature to 1400-1450℃ at a rate of 3-5℃ / min and hold for 2-3 hours, with an oxygen partial pressure of 10. -9 -10 -10 MPa.

[0019] Preferably, the temperature-controlled crystallization includes:

[0020] First, cool down to 950-1000℃ at a rate of 80-100℃ / h and hold for 1-2 hours;

[0021] Then cool down to 750-800℃ at a rate of 30-50℃ / h and hold for 2-3 hours;

[0022] Finally, the temperature is reduced to 550-600℃ at a rate of 10-20℃ / h and then cooled in the furnace.

[0023] The oxygen partial pressure during the crystallization stage is 10. -7 -10 -8 MPa.

[0024] Preferably, the method further includes crushing the waste generated from cutting and grinding to 0.5-3mm and reusing it into the base components at a ratio of 20-30% of the total raw material mass; the waste composition is tested before reuse to ensure that the fluctuation of the main components is ≤5%. After the waste is reused, the total proportion of industrial solid waste (including waste glass, steel slag powder, mineral powder modifier, and reused waste) in the raw materials is 30-40%, and the leaching of heavy metals in the solid waste meets the requirements of GB 5085.3-2007.

[0025] Preferably, in the segmented melting process, the fuel used is a mixture of natural gas and hydrogen in a volume ratio of (3-5):1, with a combustion efficiency of ≥95%, and is carried out in a continuous atmosphere furnace.

[0026] Mechanism of action of the present invention:

[0027] (1) Mechanism of high-strength composite reinforcement system

[0028] The reinforcing mechanism of modified silicon nitride micropowder: β-phase silicon nitride has a hexagonal columnar crystal structure with a length of 5-10 μm and a diameter of 1-2 μm. During the melting process, it is uniformly dispersed in the glass phase (dispersion ≥90%). During cooling and crystallization, the columnar crystals and the α-cordierite crystal phase (the main crystal phase, with a content ≥60%) form an "interwoven skeleton". When the material is subjected to external force, the crack extends to the columnar crystals and is hindered by crystal bridging force (bridging force ≥50MPa). At the same time, the crack is deflected (deflection angle 30-60°), consuming more energy (energy absorption value ≥200J / m²), thereby significantly improving the bending strength and fracture toughness.

[0029] Alumina synergistic reinforcement mechanism: Alumina (Al2O3) is a corundum phase (Mohs hardness 9), which can fill the gaps between silicon nitride and cordierite crystal phases within the material (filling rate ≥80%), reducing porosity (from 5% to below 2%); simultaneously, Al 3+ Can react with Si in the glass phase 4+ It forms Al-O-Si bonds (bond energy ≥450kJ / mol), enhances interfacial bonding (interfacial bonding strength increases by 25%), avoids strength reduction caused by interfacial separation, and further improves compressive strength and hardness.

[0030] (2) Mechanism of uniform crystallization control

[0031] Nucleation mechanism of composite nucleating agents: TiO2 first forms a Ti-O-Si solid solution (solid solubility ≥15%) at 950-1000℃, which serves as the initial nucleus (nucleation rate ≥10). 4 ZrO2 adsorbs on the surface of Ti-O-Si solid solution, inhibiting crystal nucleus growth (reducing grain growth rate by 40%) and refining grains (from 5 μm to 2 μm); Y2O3 acts as a crystallizer, reducing the crystallization activation energy of α-cordierite (from 300 kJ / mol to 220 kJ / mol), promoting uniform precipitation of crystalline phases (crystalline phase distribution uniformity ≥90%), and avoiding performance fluctuations caused by excessive local amorphous glass phases.

[0032] Ultrasonic dispersion-assisted mechanism: After the composite nucleating agent is ultrasonically dispersed at 300-500W for 15-20 minutes, the agglomerates are broken up (the agglomerate particle size is reduced from 10μm to below 5μm), the dispersion uniformity in the raw material is improved by 30%, ensuring that the nucleus density in each region is consistent (deviation ≤10%), and further ensuring the stability of material performance (strength fluctuation ≤5%).

[0033] (3) High-stability coloring mechanism

[0034] Segmented Atmosphere Valence Regulation Mechanism: Pre-melting Stage (Oxygen Partial Pressure 10) -8 -10 -9 A weak reducing atmosphere (MPa) can remove adsorbed oxygen from the surface of the colored oxides (oxygen removal rate ≥90%), avoiding color deviation caused by oxidation; complete melting stage (oxygen partial pressure 10 MPa) -9 -10 -10 A medium reducing atmosphere (MPa) can promote the dissolution of colored oxides (increasing solubility by 20%), but inhibits Fe... 3+ →Fe 2 + (Reduction rate ≤ 5%); Crystallization stage (Oxygen partial pressure 10) -7 -10 -8 (MPa) is a weak oxidizing atmosphere, which can fix the valence state of the coloring ions (Fe). 3+Stability ≥95%, Cr 3+ Stability ≥ 98%), avoiding valence state changes during the cooling process.

[0035] The stabilization mechanism of cerium oxide nanoparticles: CeO2 nanoparticles (particle size ≤ 50 nm) can be adsorbed on the surface of colored oxides (adsorption amount ≥ 1 mg / m²), forming a "protective layer" that prevents ion diffusion and aggregation (aggregation rate decreases from 30% to 5%); simultaneously, Ce... 3+ / Ce 4+ Redox (redox potential 0.8-1.0V) can adjust the potential of the molten system, and its relationship with Fe... 3+ / Fe 2+ (0.77V), Cr 3+ / Cr 6+ (1.33V) forms a potential equilibrium, further suppressing valence state transitions.

[0036] (4) Low-carbon and environmental protection synergistic mechanism

[0037] Industrial solid waste substitution mechanism: Steel slag powder (CaO content 40-50%) can replace calcite (CaCO3), reducing CO2 emissions from calcite decomposition (0.1t CO2 emission reduction per ton of material); Mineral powder modifier (active Al2O3 content 20-30%) can replace some alumina, reducing energy consumption in primary raw material mining (50kWh energy consumption reduction per ton of material); Silica fume (SiO2 content ≥90%) can replace quartz sand, improving the density of the glass phase and reducing waste in later processing (waste rate reduced from 15% to 8%).

[0038] Waste recycling mechanism: Waste generated from cutting and grinding (mainly composed of cordierite, glass phase, and silicon nitride) can be crushed to 0.5-3mm and reused as "aggregate" in the basic components (recycling ratio 20-30%). This not only reduces solid waste emissions (0.2t reduction per ton of product), but also fills gaps in raw materials and lowers the melting temperature (from 1450℃ to 1400℃, reducing energy consumption by 80kWh per ton of product).

[0039] Low-carbon fuel energy-saving mechanism: The combustion thermal efficiency of natural gas and hydrogen mixed fuel (volume ratio 3-5:1) is ≥95% (the thermal efficiency of traditional electric furnace is 70%), and hydrogen combustion has no carbon emissions (CO2 emissions come only from natural gas), which reduces carbon emissions by 0.3t per ton of product compared with traditional electric furnace (a reduction of 25-30%); at the same time, the flame temperature of the mixed fuel is uniform (temperature difference ≤50℃), which can reduce the internal temperature gradient of the material and reduce the risk of cracking (cracking rate is reduced from 5% to 1%).

[0040] (5) Safety performance control mechanism

[0041] Mechanism of radioactive screening of raw materials: When selecting industrial solid waste such as waste glass and steel slag, radioactive nuclides are detected by gamma-ray energy dispersive spectrometer (GEDS). 226 Ra、 232 Th、 40 To ensure that the internal radiation index IRa ≤ 1.0 and the external radiation index Ir ≤ 1.3, the use of highly radioactive solid wastes such as phosphate slag and coal gangue (usually IRa ≥ 1.5) should be avoided to control radiation risks at the source.

[0042] Heavy metal leaching control mechanism: Before use, solid wastes such as steel slag powder and mineral powder modifiers are tested for heavy metals (Pb, Cd, Cr) according to GB 5085.3-2007 "Identification Standard for Hazardous Waste - Leaching Toxicity Identification". 6+ The leaching amount (etc.) is controlled to ensure that the leaching concentration is ≤0.1mg / L; at the same time, the glass phase can encapsulate heavy metals (encapsulation rate ≥90%), preventing them from leaching during use and ensuring material safety.

[0043] The beneficial effects of this invention are as follows:

[0044] (1) Significantly improved mechanical properties and extended service life

[0045] The material of this invention has a bending strength ≥650MPa, compressive strength ≥1200MPa, fracture toughness ≥7.0MPa·m¹ / ², and Mohs hardness ≥6.5, which can withstand greater external impact and load, avoiding problems such as cracking and wear; the water absorption rate is ≤0.1%, which can reduce mold growth and freeze-thaw damage caused by water penetration, extending the service life from 10 years to more than 25 years and reducing the later maintenance cost.

[0046] (2) The decorative effect is close to that of natural luxury stone, and the application scenarios are expanded.

[0047] With a color difference ΔE ≤ 1.0 and a texture similarity ≥ 95%, the material can accurately reproduce the texture details of natural marble and granite (such as the texture lines of gold-colored beige and the particle distribution of black gold sand). At the same time, by adjusting the types and proportions of coloring oxides, a variety of colors (red, yellow, black, gray, etc.) and textures (landscape patterns, random patterns, straight patterns, etc.) can be customized to meet the personalized needs of high-end decoration. The radiation dose rate is ≤ 0.09 μSv / h (25% lower than the Class A material standard), which can be safely used in radiation-sensitive places such as residences, hospitals, and schools, expanding the application scenarios by more than 30% compared with traditional imitation stone materials.

[0048] (3) Outstanding low-carbon and environmental protection benefits

[0049] The industrial solid waste utilization rate is ≥30%, with 0.3t of solid waste consumed per ton of product, reducing the land occupied by solid waste landfill; carbon emissions are reduced by 25-30%, and energy consumption is reduced by 15-20%; at the same time, the waste recycling rate is 20-30%, further reducing resource consumption, and the raw material cost per ton of product is reduced by 15%.

[0050] (4) The process is stable and easy to industrialize, and the production efficiency is improved.

[0051] The process of this invention adopts a continuous atmosphere furnace (capacity 1t / h, compared to 0.5t / h for a traditional intermittent furnace), increasing production efficiency by 100%; the segmented melting and crystallization process parameters are controllable, and the product qualification rate is ≥95%; the raw material pretreatment adopts a combination of magnetic separation and air separation (impurity removal rate ≥98%), avoiding performance defects caused by impurities; the post-processing adopts diamond saw blades and gradient grinding process (grinding efficiency increased by 50%), and the surface gloss is ≥90%. Detailed Implementation

[0052] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0053] It should be noted that all reagents and raw materials used in this invention are commercially available, and the reagents are of analytical grade.

[0054] In this invention, waste glass scraps specifically refer to the scraps from the cutting of discarded glass generated in the construction or electronics industries, not ordinary household waste glass. In the construction sector, this mainly comes from the cutting scraps of door and window glass and curtain wall glass; in the electronics sector, it comes from the processing waste of display screen glass (such as LCD and OLED panels) and photovoltaic glass. In this embodiment of the invention, the composition of the waste glass scraps is as follows: SiO2 72%, Na2O 12%, CaO 9%, MgO 3%, Al2O3 2%, Fe2O3 1.3%, with the balance being other impurities (including Pb≤0.1%, Cr≤0.05%).

[0055] Steel slag powder is industrial steelmaking waste slag, with the following composition: CaO 50%, SiO2 15%, FeO 15%, MgO 14%, Al2O3 3%, MnO 1%, P2O5 1.2%, and the balance being other impurities.

[0056] The mineral powder modifier is an active mineral powder made by grinding and activating blast furnace slag produced during the blast furnace ironmaking process; its composition is CaO 35%, SiO2 30%, Al2O3 20%, MgO 7%, Fe2O3 3%, SO3 2%, Na2O 1%, K2O 1%, and the balance being other impurities.

[0057] The activation modification method is as follows: A composite activator is added at 4% of the slag mass, with a composition of Na2SO4:CaSO4:NaOH = 2:2:1 (mass ratio); the slag and activator are added to a ball mill, and deionized water is added at a solid-liquid ratio of 1:0.8. The mixture is wet-milled at 300 r / min for 30 min to form a uniform slurry, which is then aged at 65℃ for 24 h; the aged slurry is treated with a spray dryer (inlet air temperature 210℃, outlet air temperature 85℃) to obtain dry powder with an average particle size of 75 μm; the dry powder is calcined in a rotary kiln at 650℃ for 1.5 h (heating rate 5℃ / min); after calcination, the dry powder is ground by an air jet mill to an average particle size of 7.5 μm, thus obtaining the finished mineral powder modifier.

[0058] Example 1

[0059] Raw material formula: parts by weight:

[0060] Skeleton support materials: 30 parts feldspar, 25 parts waste glass scraps (average particle size 0.5mm), 15 parts quartz sand, 12 parts kaolin, and 8 parts calcite.

[0061] Reinforcing and nucleation materials: 8 parts alumina, 4.5 parts modified silicon nitride micro powder (average particle size 0.5μm, β phase content 90%), 3 parts composite nucleating agent (composed of titanium dioxide, zirconium oxide and yttrium oxide, with a mass ratio of 2.5:0.8:0.8, average particle size 5μm, ultrasonically dispersed at 300W for 20min);

[0062] Fluxing and conditioning raw materials: 4 parts zinc oxide, 3 parts strontium carbonate, 3 parts boric acid, 2 parts fluorite, 3 parts soda ash, 0.5 parts antimony oxide;

[0063] Low-carbon and stable raw materials: 4.25 parts of low-carbon additives (composed of steel slag powder, mineral powder modifier, silica fume and nano calcium carbonate, with a mass ratio of 2:2:2:1) and 0.75 parts of nano cerium oxide.

[0064] Coloring oxide: 1.5 parts iron oxide (average particle size 0.8 μm).

[0065] Preparation method:

[0066] (1) Raw material pretreatment:

[0067] 1.1: Waste glass scraps that meet the requirements for Class A decorative materials in GB 6566-2010 for radioactive element content were screened. The waste glass scraps, steel slag powder, and mineral powder modifier were then subjected to magnetic separation (magnetic field strength 1500 Gs), air separation (wind speed 5 m / s), and ultrasonic cleaning (200 W, 20 min) in sequence. After cleaning, they were dried at 105℃ for 5 h (moisture content reduced to about 0.5%) to obtain the processed waste glass scraps, steel slag powder, and mineral powder modifier.

[0068] 1.2: Take 3% by weight of silicon nitride micro powder and add an appropriate amount of ethanol solution (volume ratio: ethanol:water = 8:2) to dilute (KH-550 to ethanol solution mass ratio 1:5); add the diluted KH-550 solution dropwise into silicon nitride micro powder and stir at 300 r / min for 2 h at 80℃; after the reaction is completed, concentrate under reduced pressure at 55℃ and 0.09 MPa, and then dry at 105℃ for 2 h to remove ethanol and residual water to obtain modified silicon nitride micro powder;

[0069] 1.3: Weigh titanium dioxide, zirconium oxide and yttrium oxide according to the mass ratio, mix them to prepare a composite nucleating agent, put the mixed composite nucleating agent into the material container of an ultrasonic disperser, and ultrasonically disperse it at 300W for 20 minutes to obtain the dispersed composite nucleating agent.

[0070] (2) Ingredients and mixing: Feldspar, treated waste glass scraps, quartz sand, kaolin, zinc oxide, strontium carbonate, alumina, calcite, boric acid, modified silicon nitride micro powder, treated steel slag micro powder, treated mineral powder modifier, silica fume, nano calcium carbonate, dispersed composite nucleating agent, fluorite, soda ash, antimony oxide, and 70% nano cerium oxide are mixed according to the formula and stirred at 350 r / min for 25 min to obtain the basic components; iron oxide is mixed with 30% nano cerium oxide, nitrogen gas is introduced for protection, and stirred at 1800 r / min for 18 min to form the texture-forming components;

[0071] (3) Layered fabric application: First, a 3mm base component is laid in the mold, then the texture-forming component is laid according to the natural stone texture pattern (using 3D printing pre-laying technology), and finally an 8mm base component is covered. The mold is then pressurized in sections using a hydraulic press (pressure 6MPa), and the compaction density is controlled at 1.8g / cm³. 3 ;

[0072] (4) Stage melting and atmosphere control: Pre-melting stage: oxygen partial pressure 10 -8.5 MPa, 1300℃, held for 1.5h (heating rate 6℃ / min); complete melting stage: oxygen partial pressure 10 -9.5 MPa, 1420℃ for 2.5h (heating rate 4℃ / min), fuel is a mixture of natural gas and hydrogen in a volume ratio of 4:1;

[0073] (5) Temperature-controlled crystallization: oxygen partial pressure during crystallization stage 10 -7.5 MPa, first cool down to 980℃ at 90℃ / h and hold for 1.5h, then cool down to 780℃ at 40℃ / h and hold for 2.5h, and finally cool down to 580℃ at 15℃ / h and cool with the furnace.

[0074] (6) Post-processing: After cooling to room temperature, cut with a diamond saw blade, and grind with 80#, 200#, 800# and 1500# grinding wheels in sequence. Finally, polish with a wool wheel (polishing pressure 1.0MPa, speed 900r / min) until the gloss is 92°, thus obtaining a high-strength luxury stone material with natural texture.

[0075] (7) Waste recycling: The waste generated from cutting and grinding is crushed to 0.5mm using a combination of jaw crusher and ball mill. It is recycled into the basic components of step (2) at a ratio of 25% of the total mass of raw materials. Before recycling, the waste composition is tested to ensure that the main component fluctuation is 5%.

[0076] Example 2

[0077] Raw material formula:

[0078] Skeleton support materials: 25 parts feldspar, 30 parts waste glass scraps (average particle size 1.0 mm), 20 parts quartz sand, 15 parts kaolin, and 10 parts calcite.

[0079] Reinforcing and nucleation materials: 6 parts alumina, 3 parts modified silicon nitride micro powder (average particle size 1.0 μm, β phase content 91%), 2 parts composite nucleating agent (composed of titanium dioxide, zirconium oxide, and yttrium oxide, with a mass ratio of 3:1:1, average particle size 4 μm, ultrasonically dispersed at 400W for 18 min); Fluxing and conditioning materials: 3 parts zinc oxide, 2 parts strontium carbonate, 2 parts boric acid, 1 part fluorite, 2 parts soda ash, 0.3 parts antimony oxide;

[0080] Low-carbon and stable raw materials: 2.5 parts of low-carbon additives (composed of steel slag powder, mineral powder modifier, silica fume, and nano calcium carbonate, with a mass ratio of 1.5:1.5:1.5:0.8) and 0.5 parts of nano cerium oxide;

[0081] Coloring oxide: 0.5 parts of chromium oxide (average particle size 0.5 μm).

[0082] Preparation method:

[0083] (1) Raw material pretreatment: The specific steps are the same as in Example 1;

[0084] (2) Batching and mixing: Feldspar, treated waste glass scraps, quartz sand, kaolin, zinc oxide, strontium carbonate, alumina, calcite, boric acid, modified silicon nitride micro powder, treated steel slag micro powder, treated mineral powder modifier, silica fume, nano calcium carbonate, dispersed composite nucleating agent, fluorite, soda ash, antimony oxide, and 70% nano cerium oxide are mixed according to the proportion and stirred at 300 r / min for 30 min to obtain the basic components; iron oxide is mixed with 30% nano cerium oxide, nitrogen gas is introduced for protection, and stirred at 1500 r / min for 20 min to form the texture-forming components;

[0085] (3) Layered fabric application: First, a 5mm base component is laid in the mold, then the texture-forming component is laid according to the natural stone texture pattern (using 3D printing pre-laying technology), and finally the 5mm base component is covered. The hydraulic press is used to apply pressure in sections (pressure 5MPa), and the compaction density is controlled at 1.9g / cm³. 3 ;

[0086] (4) Stage melting and atmosphere control: Pre-melting stage: oxygen partial pressure 10 -8 MPa, 1250℃ for 2 hours (heating rate 5℃ / min); complete melting stage: oxygen partial pressure 10 MPa. -9 MPa, 1400℃ heat preservation for 3h (heating rate 3℃ / min), fuel is a mixture of natural gas and hydrogen in a volume ratio of 3:1;

[0087] (5) Temperature-controlled crystallization: oxygen partial pressure during crystallization stage 10 -7 MPa, first cool down to 950℃ at 80℃ / h and hold for 2h, then cool down to 750℃ at 30℃ / h and hold for 2h, and finally cool down to 550℃ at 10℃ / h and cool with the furnace.

[0088] (6) Post-processing: After cooling to room temperature, cut with a diamond saw blade, and grind with 80#, 200#, 800# and 1500# grinding wheels in sequence. Finally, polish with a wool wheel (polishing pressure 0.8MPa, speed 800r / min) until the gloss is 95°, thus obtaining a high-strength luxury stone material with natural texture.

[0089] (7) Waste recycling: The waste generated from cutting and grinding is crushed to 1.0mm using a combination of jaw crusher and ball mill. It is recycled into the basic components of step (2) at a ratio of 20% of the total mass of raw materials. Before recycling, the waste composition is tested to ensure that the main component fluctuation is 4%.

[0090] Example 3

[0091] Raw material formula:

[0092] Skeleton support materials: 35 parts feldspar, 20 parts waste glass scraps (average particle size 1.5mm), 10 parts quartz sand, 8 parts kaolin, and 5 parts calcite.

[0093] Reinforcing and nucleation materials: 10 parts alumina, 6 parts modified silicon nitride micro powder (average particle size 1.5μm, β phase content 95%), 4 parts composite nucleation agent (composed of titanium dioxide, zirconium oxide and yttrium oxide, with a mass ratio of 3.5:1.2:1.2, average particle size 3μm, ultrasonically dispersed at 500W for 20min).

[0094] Fluxing and conditioning raw materials: 5 parts zinc oxide, 4 parts strontium carbonate, 4 parts boric acid, 3 parts fluorite, 4 parts soda ash, 0.8 parts antimony oxide;

[0095] Low-carbon and stable raw materials: 6 parts of low-carbon additives (composed of steel slag micro powder, mineral powder modifier, silica fume and nano calcium carbonate, with a mass ratio of 3:3:3:1.2), 1 part of nano cerium oxide; Coloring oxides: 3 parts of chromium oxide (average particle size 1.0 μm).

[0096] Preparation method:

[0097] (1) Raw material pretreatment: The specific steps are the same as in Example 1;

[0098] (2) Batching and mixing: Feldspar, treated waste glass scraps, quartz sand, kaolin, zinc oxide, strontium carbonate, alumina, calcite, boric acid, modified silicon nitride micro powder, treated steel slag micro powder, treated mineral powder modifier, silica fume, nano calcium carbonate, dispersed composite nucleating agent, fluorite, soda ash, antimony oxide, and 70% nano cerium oxide are mixed according to the proportion and stirred at 400 r / min for 20 min to obtain the basic components; iron oxide is mixed with 30% nano cerium oxide, nitrogen gas is introduced for protection, and stirred at 1800 r / min for 15 min to form the texture-forming components;

[0099] (3) Layered fabric application: First, a 4mm base component is laid in the mold, then the texture-forming component is laid according to the natural stone texture pattern (using 3D printing pre-laying technology), and finally a 7mm base component is covered. A hydraulic press is used to apply pressure in sections (pressure 8MPa), and the compaction density is controlled at 2.0g / cm³. 3 ;

[0100] (4) Stage melting and atmosphere control: Pre-melting stage: oxygen partial pressure 10 -9 MPa, 1350℃ for 1 hour (heating rate 8℃ / min); complete melting stage: oxygen partial pressure 10 MPa. -10 MPa, 1450℃ for 2 hours (heating rate 5℃ / min), fuel is a mixture of natural gas and hydrogen in a volume ratio of 4:1;

[0101] (5) Temperature-controlled crystallization: oxygen partial pressure during crystallization stage 10 -8 MPa, first cool down to 1000℃ at 100℃ / h and hold for 1h, then cool down to 800℃ at 50℃ / h and hold for 2h, and finally cool down to 600℃ at 20℃ / h and cool with the furnace.

[0102] (6) Post-processing: After cooling to room temperature, cut with a diamond saw blade, and grind with 80#, 200#, 800# and 1500# grinding wheels in sequence. Finally, polish with a wool wheel (polishing pressure 1.2MPa, speed 1000r / min) until the gloss is 90°, thus obtaining a high-strength luxury stone material with natural texture.

[0103] (7) Waste recycling: The waste generated from cutting and grinding is crushed to 2.0mm using a combination of jaw crusher and ball mill. It is recycled into the basic components of step (2) at a ratio of 30% of the total mass of raw materials. Before recycling, the waste composition is tested to ensure that the main component fluctuation is 3%.

[0104] Example 4

[0105] Raw material formula:

[0106] Skeleton support materials: 32 parts feldspar, 28 parts waste glass scraps (average particle size 2.0 mm), 18 parts quartz sand, 10 parts kaolin, and 9 parts calcite;

[0107] Reinforcing and nucleation materials: 7 parts alumina, 5 parts modified silicon nitride micro powder (average particle size 2.0 μm, β phase content 90%), 2.8 parts composite nucleating agent (composed of titanium dioxide, zirconium oxide and yttrium oxide, with a mass ratio of 3.2:1.1:1.1, average particle size 5 μm, ultrasonically dispersed at 400W for 26 min);

[0108] Fluxing and conditioning raw materials: 3.5 parts zinc oxide, 2.5 parts strontium carbonate, 2.5 parts boric acid, 1.5 parts fluorite, 2.5 parts soda ash, 0.6 parts antimony oxide;

[0109] Low-carbon and stable raw materials: 5 parts of low-carbon additives (composed of steel slag powder, mineral powder modifier, silica fume, and nano calcium carbonate, with a mass ratio of 2.5:2.5:2.5:1) and 0.9 parts of nano cerium oxide;

[0110] Two parts of coloring oxide (composed of 1.2 parts of iron oxide and 0.8 parts of chromium oxide, both of which were treated by air jet milling with an average particle size of 0.6 μm).

[0111] Preparation method:

[0112] (1) Raw material pretreatment: The specific steps are the same as in Example 1;

[0113] (2) Batching and mixing: Feldspar, treated waste glass scraps, quartz sand, kaolin, zinc oxide, strontium carbonate, alumina, calcite, boric acid, modified silicon nitride micro powder, treated steel slag micro powder, treated mineral powder modifier, silica fume, nano calcium carbonate, dispersed composite nucleating agent, fluorite, soda ash, antimony oxide, and 70% nano cerium oxide are mixed according to the proportion and stirred at 400 r / min for 22 min to obtain the basic components; iron oxide is mixed with 30% nano cerium oxide, nitrogen gas is introduced for protection, and stirred at 1900 r / min for 16 min to form the texture-forming components;

[0114] (3) Layered fabric application: First, a 4mm base component is laid in the mold, then the texture-forming component is laid according to the natural stone texture pattern (using 3D printing pre-laying technology), and finally a 7mm base component is covered. A hydraulic press is used to apply pressure in sections (pressure 7MPa), and the compaction density is controlled at 1.8g / cm³. 3 ;

[0115] (4) Stage melting and atmosphere control: Pre-melting stage: oxygen partial pressure 10 -8.2 MPa, 1280℃ for 1.2h (heating rate 7℃ / min); complete melting stage: oxygen partial pressure 10 -9.3 MPa, 1430℃ for 2.2h (heating rate 4℃ / min), fuel is a mixture of natural gas and hydrogen in a volume ratio of 4:1;

[0116] (5) Temperature-controlled crystallization: oxygen partial pressure during crystallization stage 10 -7.2 MPa, first cool down to 970℃ at 85℃ / h and hold for 1.3h, then cool down to 770℃ at 35℃ / h and hold for 2.3h, and finally cool down to 570℃ at 12℃ / h and cool with the furnace.

[0117] (6) Post-processing: After cooling to room temperature, cut with a diamond saw blade, and grind with 80#, 200#, 800# and 1500# grinding wheels in sequence. Finally, polish with a wool wheel (polishing pressure 0.9MPa, speed 850r / min) until the gloss is 95°, thus obtaining a high-strength luxury stone material with natural texture.

[0118] (7) Waste recycling: The waste generated from cutting and grinding is crushed to 3.0mm using a combination of jaw crusher and ball mill. It is recycled into the basic components of step (2) at a ratio of 28% of the total mass of raw materials. Before recycling, the waste composition is tested to ensure that the main component fluctuation is 5%.

[0119] Comparative Example 1

[0120] In terms of raw material formulation, sulfate-resistant cement (model P·HSR42.5) was used to replace modified silicon nitride micro powder, and the composite nucleating agent was a single titanium dioxide. Other aspects were the same as in Example 1.

[0121] The preparation method is the same as in Example 1.

[0122] Comparative Example 2

[0123] Regarding the raw material formulation, it does not contain nano-cerium oxide, but is replaced with lanthanum oxide; other components are the same as in Example 2.

[0124] In the preparation method, the oxygen partial pressure during the melting and crystallization stages is fixed at 10. -10 MPa (no segmentation), other parameters are the same as in Example 2.

[0125] Comparative Example 3

[0126] Regarding the raw material formulation, feldspar was used to replace the low-carbon additives, and the rest was the same as in Example 3;

[0127] The preparation method has no waste recycling steps, and other aspects are the same as in Example 3.

[0128] Comparative Example 4

[0129] Regarding the raw material formulation, the coloring oxide is iron oxide with an average particle size of 5 μm, and the rest is the same as in Example 1;

[0130] In the preparation method, the composite nucleating agent was not ultrasonically dispersed, and the rest was the same as in Example 1.

[0131] The performance of the luxury stone materials in Examples 1-4 and Comparative Examples 1-4 was tested. The test methods and standards are as follows, and the test results are recorded in Table 1:

[0132] 1. Bending strength test: According to GB / T3810.4-2016 "Test methods for ceramic tiles - Part 4: Determination of modulus of rupture and breaking strength", a 250mm×30mm×10mm specimen was prepared. The three-point bending method was used with a span of 200mm and a loading speed of 5mm / min. The maximum load at fracture was recorded. The bending strength was calculated according to the formula (σ=3FL / (2bh²), where F is the maximum load, L is the span, b is the specimen width, and h is the specimen thickness). Five specimens were tested in each group, and the average value was taken.

[0133] 2. Compressive strength test: According to GB / T3810.13-2016 "Test methods for ceramic tiles - Part 13: Determination of compressive strength", prepare 50mm×50mm×50mm cube specimens (side length deviation ≤0.5mm), use a universal testing machine, load speed 20kN / s (in line with the standard "15-25kN / s" range), record the maximum breaking pressure F, and calculate the compressive strength according to the formula σ=F / A (A is the area of ​​the specimen under pressure, unit mm²). Test 5 specimens in each group and take the average value (discard outliers with deviation >10%).

[0134] 3. Fracture toughness testing: According to GB / T23806-2009 "Test Method for Fracture Toughness of Fine Ceramics - Single-sided Pre-cracked Beam Method", a 25mm × 5mm × 2mm sample was prepared. A Vickers hardness tester was used to pre-crack the sample in the middle (load 10N, holding pressure 15s). The sample was then tested using the three-point bending method (span 20mm, loading speed 0.5mm / min). The fracture toughness was calculated according to the formula. (Y is the shape factor, σ is the bending stress, and c is the crack length). Five samples were tested in each group, and the average value was taken.

[0135] 4. Mohs Hardness Test: According to Chapter 5 "Mohs Hardness Test" of GB / T16534-2009 "Method for Room Temperature Hardness Test of Fine Ceramics", a Mohs hardness standard block (grades 1 to 10, conforming to GB / T230.1 requirements) and a Mohs hardness pen are used to scratch the sample surface in a defect-free area (area ≥ 10mm × 10mm) sequentially from grade 1 (talc) to grade 10 (diamond) (scratching force 5-10N, scratch length 10-15mm). The lowest hardness grade that produces obvious and continuous scratches is recorded as the Mohs hardness of the sample. Three different locations are tested in each group, and the consistent results are taken (if a grade 1 deviation occurs, two more test points are required).

[0136] 5. Water absorption rate test: According to GB / T3810.3-2016 "Test methods for ceramic tiles - Part 3: Determination of water absorption, apparent porosity, apparent relative density and bulk density", prepare a 50mm×50mm×10mm sample, dry it at 105-110℃ to constant weight (mass m1), then soak it in distilled water at 20℃ for 24h, take it out, wipe off the surface moisture and weigh it (mass m2), calculate the water absorption rate according to the formula (W=(m2-m1) / m1×100%), test 5 samples in each group and take the average value.

[0137] 6. Color Difference ΔE Detection: Based on GB / T7921-2008 "Uniform Color Space and Color Difference Formula", a spectrophotometer (wavelength range 400-700nm, measuring aperture 8mm) was used for calibration with a standard white plate (L*=95, a*=0, b*=0). The color coordinates (L1*, a1*, b1*) at three different locations on the sample surface were measured, along with the color coordinates (L0*, a0*, b0*) of standard natural stone. The color difference was calculated using the formula. Three samples were tested in each group, and the average value was taken.

[0138] 7. Texture similarity test: According to Appendix C (texture similarity evaluation method) of JG / T596-2021 "Imitation Stone Ceramic Slab", a high-definition scanner (1200dpi resolution) is used to obtain texture images of the sample and standard natural stone. Texture features (such as line density, gray scale distribution, and texture direction) are extracted by image analysis software, and the feature matching rate is calculated, which is the texture similarity. Three samples are tested in each group, and the average value is taken (matching rate ≥90% is qualified).

[0139] 8. Radiation dose rate detection: In accordance with GB6566-2010 "Limits of Radionuclides in Building Materials", a gamma-ray dose rate meter (measurement range 0.01-10 μSv / h, accuracy ±10%) was used. Five measurement points were evenly selected at 5 cm from the sample surface. The measurement time for each point was 10 min. The dose rate values ​​were recorded and the average value was taken (≤0.12 μSv / h is Class A material and can be used in any place).

[0140] 9. Industrial solid waste utilization rate test: According to Appendix D (Calculation method of solid waste utilization rate) of GB / T38808-2020 "Technical Standard for Application of Recycled Aggregates", weigh the mass of waste glass, steel slag powder, mineral powder modifier, and recycled waste in the raw materials (m solid waste) and the total mass of raw materials (m total). Calculate the industrial solid waste utilization rate according to the formula (η=m solid waste / m total×100%). Test each group 3 times and take the average value.

[0141] 10. In accordance with Chapter 5, "Accounting for Fuel Combustion Emissions," of GB / T32151.10-2016 "Greenhouse Gas Emissions Accounting and Reporting Requirements Part 10: Other Industries," the "emission factor method" is used to calculate:

[0142] Carbon emissions from traditional electric furnace processes: Ctraditional = Eelectric × EFelectric (Eelectric is the electricity consumption per ton of product, kWh / t; EFelectric is the carbon emission factor for electricity, 0.6101tCO2 / MWh, based on the "Guidelines for the Compilation of Provincial Greenhouse Gas Inventories (2022 Edition)").

[0143] Carbon emissions of the process of this invention: Cinvention = Vgas × EFgas (Vgas is the natural gas consumption per ton of product, m³ / t; EFgas is the carbon emission factor of natural gas, 0.217tCO2 / m³, according to Appendix B of GB / T32151.10-2016).

[0144] Carbon emission reduction rate: η=(Ctraditional-Cinvented) / Ctraditional×100%, each group was tested 3 times (different production batches), and the average value was taken.

[0145] Table 1 Performance Test Results

[0146] sample Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Flexural strength (MPa) 685 652 720 693 421 642 716 593 Compressive strength (MPa) 1250 1209 1350 1287 852 1183 1324 1051 Fracture toughness (MPa・m¹ / ²) 7.5 7.0 7.8 7.3 4.2 6.8 7.6 6.0 Mohs hardness 6.8 6.5 7.0 6.7 5.5 6.4 6.9 6.2 Water absorption rate (%) 0.07 0.10 0.05 0.08 0.32 0.11 0.06 0.15 Color difference ΔE 0.8 1.0 0.7 0.9 0.8 2.3 0.7 1.6 Texture similarity (%) 97 95 98 96 94 82 98 88 Radiation dose rate (μSv / h) 0.08 0.09 0.07 0.08 0.06 0.09 0.07 0.06 Industrial solid waste utilization rate (%) 35 31 42 38 33 30 12 34 Carbon emission reduction rate (%) 28 25 30 29 26 23 10 27

[0147] As shown in the table above, the flexural strength of Comparative Example 1 (421 MPa) decreased by 38.7% compared to Example 1 (685 MPa), and the fracture toughness (4.2 MPa·m) also decreased. 1 / 2 The water absorption rate decreased by 44%, while the water absorption rate (0.32%) increased by 357%. This is because cement completely decomposes above 1400℃, failing to form a "skeleton support" and creating porosity (porosity increased from 2% to 8%). The crystallization of the single TiO2 nucleating agent was uneven (nucleation density increased from 10...). 6 The number of cells / cm³ decreased to 3×10 5 The content of α-cordierite crystal phase decreased (from 60% to 35%), proving that "silicon nitride micro powder + ternary composite nucleating agent" is the key to achieving high strength and low water absorption.

[0148] Comparative Example 2 showed a 130% increase in color difference ΔE (2.3) compared to Example 2 (1.0), and a 13.7% decrease in texture similarity (82%). This was due to a fixed oxygen partial pressure of 10. -10 At MPa, Cr in chromium oxide 3+ Reduced to Cr 6+ The proportion reached 25% (only 5% in the segmented atmosphere of Example 2), and the color changed from green to orange. This is because lanthanum oxide cannot precisely stabilize Cr like nano-cerium oxide. 3+ Furthermore, it cannot suppress the aggregation of colorants, proving that "segmented atmosphere control + nano-cerium oxide" is the key to achieving low color difference and high texture similarity.

[0149] Comparative Example 3 showed a 71% reduction in industrial solid waste utilization rate (12%) compared to Example 3 (42%), and a 66.7% reduction in carbon emission rate (10%). Without low-carbon additives, the proportion of industrial solid waste (waste glass only) decreased from 40% to 12%. Increased use of protoliths led to higher energy consumption (from 600 kWh / t to 850 kWh / t). Without waste recycling, solid waste emissions per ton of product increased from 0.1 t to 0.3 t, and the carbon emission factor increased from 0.25 tCO2 / m³ to 0.45 tCO2 / m³. This demonstrates that "low-carbon additives + waste recycling" is key to achieving high solid waste utilization and low carbon emissions.

[0150] Comparative Example 4 showed a 13.4% decrease in flexural strength (593 MPa) and a 9.3% decrease in texture similarity (88%) compared to Example 1 (685 MPa). The 5 μm particle size of the coloring oxide was not pulverized, forming "hard spots" during melting, leading to stress concentration and decreased mechanical properties. The nucleating agent was not ultrasonically dispersed, resulting in concentrated crystallization areas (70% crystalline phase content in some areas, only 30% in others), and poor material uniformity. This demonstrates that "fine-particle-size coloring oxide + ultrasonic dispersion of the nucleating agent" is key to achieving a synergistic effect between decorative and mechanical properties.

[0151] In summary, this invention, through segmented melting atmosphere control, multi-stage temperature-controlled crystallization, and a 20-30% waste recycling process, not only possesses high strength (≥650MPa flexural strength and ≥7.0MPa·m¹ / ² fracture toughness), but also achieves high decorative properties (color difference ΔE≤1.0 and texture reproduction ≥95%). Furthermore, it boasts an industrial solid waste utilization rate of ≥30% and carbon emissions reduced by 25-30% compared to traditional electric furnaces. This effectively solves the problems of low strength, poor color stability, and insufficient environmental friendliness inherent in traditional imitation stone materials, making it suitable for the high-end building materials sector.

[0152] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention. Furthermore, it should be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

[0153] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A high-strength luxury stone material imitating natural grain, characterized in that, By weight, it includes: 25-35 parts feldspar, 20-30 parts waste glass scraps, 10-20 parts quartz sand, 8-15 parts kaolin, 3-5 parts zinc oxide, 2-4 parts strontium carbonate, 6-10 parts alumina, 5-10 parts calcite, 2-4 parts boric acid, 3-6 parts modified silicon nitride micro powder, 2.5-6 parts low-carbon additives, 2-4 parts composite nucleating agent, 1-3 parts fluorite, 2-4 parts soda ash, 0.3-0.8 parts antimony oxide, 0.5-1 part nano cerium oxide, and 0.5-3 parts coloring oxides; The low-carbon additive is a mixture of steel slag powder, mineral powder modifier, silica fume and nano calcium carbonate in a mass ratio of (1.5-2.5):(1.5-2.5):(1.5-2.5):(0.8-1.2). The steel slag powder and mineral powder modifier are both industrial solid waste derivatives with a particle size of ≤10μm. The mineral powder modifier is an active mineral powder made by grinding and activating the blast furnace slag produced in the blast furnace ironmaking process. The composite nucleating agent is a mixture of titanium dioxide, zirconium oxide and yttrium oxide in a mass ratio of (2.5-3.5):(0.8-1.2):(0.8-1.2), with a particle size ≤5μm, and is subjected to ultrasonic dispersion treatment; The modified silicon nitride micro powder has a particle size of 0.5-2μm, a β phase content of ≥90%, and is surface modified with silane coupling agent KH-550. The preparation method of the high-strength luxury stone material with simulated natural texture includes the following steps: Waste glass scraps, steel slag powder, and mineral powder modifiers from low-carbon additives are sorted and impurities are removed. Feldspar, treated waste glass scraps, quartz sand, kaolin, zinc oxide, strontium carbonate, alumina, calcite, boric acid, modified silicon nitride micro powder, treated low-carbon additives, composite nucleating agent, fluorite, soda ash, antimony oxide, and 70% nano-cerium oxide are mixed and stirred according to the formula to obtain the basic components. The coloring oxide and 30% nano-cerium oxide are stirred and dispersed under nitrogen protection to obtain the texture forming components. First, a 3-5mm base component is laid in the mold, then the texture-forming component is laid according to the natural stone texture pattern, and finally a 5-8mm base component is covered. Then, it is compacted to obtain a laminate with a compaction density of 1.8-2.0g / cm3. The laminated material was subjected to segmented melting and temperature-controlled crystallization. After the crystallized product is cooled to room temperature, it is cut, ground, and polished until the gloss is ≥90°, thus obtaining the high-strength luxury stone material with natural texture. The main crystalline phase of the high-strength luxury stone material with its natural texture is α-cordierite.

2. The high-strength luxury stone material with a natural grain imitation according to claim 1, characterized in that The waste glass scraps have a particle size of 0.5-2mm, a SiO2 content of ≥70%, and are recycled materials from construction or electronic waste glass.

3. A method of making the high-strength luxury stone material with a natural grain imitation of claim 1, characterized in that, Includes the following steps: Waste glass scraps, steel slag powder, and mineral powder modifiers from low-carbon additives are sorted and impurities are removed. Feldspar, treated waste glass scraps, quartz sand, kaolin, zinc oxide, strontium carbonate, alumina, calcite, boric acid, modified silicon nitride micro powder, treated low-carbon additives, composite nucleating agent, fluorite, soda ash, antimony oxide, and 70% nano-cerium oxide are mixed and stirred according to the formula to obtain the basic components. The coloring oxide and 30% nano-cerium oxide are stirred and dispersed under nitrogen protection to obtain the texture forming components. The 3-5 mm base component is first laid in the mold, then the texture forming component is laid according to the natural stone texture pattern, and finally the 5-8 mm base component is covered, and then compaction is carried out to obtain a stack with a compaction density of 1.8-2.0 g / cm 3 ; The laminated material was subjected to segmented melting and temperature-controlled crystallization. After the crystallized product is cooled to room temperature, it is cut, ground, and polished until the gloss is ≥90°, thus obtaining the high-strength luxury stone material with natural texture.

4. The method of claim 3, wherein the high-strength luxury stone material having a natural grain pattern is prepared by the steps of: The segmented melting includes: First, 5-8°C / min to 1250-1350°C, 1-2h, 10 -8 -10 -9 MPa; Then, the temperature is raised to 1400-1450°C at a rate of 3-5°C / min, and the temperature is kept for 2-3h, the oxygen partial pressure is 10 -9 -10 -10 MPa.

5. The method for preparing high-strength luxury stone material with imitation natural texture according to claim 3, characterized in that: The temperature-controlled crystallization includes: First, cool down to 950-1000℃ at a rate of 80-100℃ / h and hold for 1-2 hours; Then cool down to 750-800℃ at a rate of 30-50℃ / h and hold for 2-3 hours; Finally, the temperature is reduced to 550-600℃ at a rate of 10-20℃ / h and then cooled in the furnace. The oxygen partial pressure in the crystallization stage was 10 -7 -10 -8 MPa.

6. The method for preparing high-strength luxury stone material with imitation natural texture according to claim 3, characterized in that, It also includes crushing the waste generated from cutting and grinding to 0.5-3mm and reusing it into the base components at a ratio of 20-30% of the total raw material mass; testing the waste composition before reuse to ensure that the fluctuation of the main components is ≤5%.

7. The method for preparing high-strength luxury stone material with imitation natural texture according to claim 3, characterized in that, In the segmented melting process, the fuel used is a mixture of natural gas and hydrogen in a volume ratio of (3-5):1, with a combustion efficiency of ≥95%.