A method for preparing quartz stone plate with recycled materials as raw materials
By treating waste quartz sand with hydrochloric acid, combining whisker modifiers and regulators, and pressing the modified liquid and polyester resin together, the problems of strength, wear resistance and acid corrosion stability of quartz stone slabs were solved, achieving a coordinated improvement in performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG OVERLAND CERAMICS CO LTD
- Filing Date
- 2023-12-05
- Publication Date
- 2026-05-29
AI Technical Summary
Existing quartz stone slabs have shortcomings in terms of strength, wear resistance, and stability under acid corrosion conditions, making it difficult to achieve coordinated improvements and limiting the product's efficiency.
Waste quartz sand is used as raw material. After pretreatment with hydrochloric acid solution, it is mixed with whisker modifier and regulator, and then mixed with modified liquid. Finally, it is combined with unsaturated polyester resin and methyl ethyl ketone peroxide and pressed into shape to form quartz stone slabs.
It improves the strength, wear resistance and acid corrosion stability of quartz stone slabs, achieving coordinated performance improvements and enhancing product efficiency.
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Figure SMS_1
Abstract
Description
Technical Field
[0001] This invention relates to the field of quartz stone slab technology, and specifically to a method for preparing quartz stone slabs using recycled materials as raw materials. Background Technology
[0002] With natural stone becoming increasingly scarce as a non-renewable resource, artificial quartz stone is the best alternative. At the same time, artificial quartz stone can be made from waste quartz, thus achieving resource reuse while protecting the environment.
[0003] Existing quartz stone slabs made from waste quartz generally have low strength. In order to improve the strength of the product, the wear resistance of the product is easily reduced. It is difficult to achieve a coordinated improvement of the strength and wear resistance of the product. In addition, the product has low performance stability under acid corrosion conditions, which limits the efficiency of the product. Summary of the Invention
[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a method for preparing quartz stone slabs using recycled materials as raw materials, so as to solve the problems mentioned in the background art.
[0005] The present invention solves the technical problem by adopting the following technical solution:
[0006] This invention provides a method for preparing quartz stone slabs using recycled materials as raw materials, comprising the following steps:
[0007] Step 1: Soak the waste quartz sand in a hydrochloric acid solution with a concentration of 1-1.2 mol / L for 15-25 minutes, then wash it with clean water 1-3 times and dry it.
[0008] Step 2: Grind the dried quartz sand from Step 1 through a ball mill to a mesh size of 100. Then mix 50-60 parts of the ball-milled quartz sand, 15-20 parts of whisker modifier, and 4-6 parts of regulator.
[0009] Step 3: Add the product from Step 2 to 45-50 parts of the modified liquid and stir to modify it. After stirring, the matrix agent is obtained.
[0010] Step four: The matrix agent, unsaturated polyester resin, and methyl ethyl ketone peroxide are mixed in a weight ratio of 10:2:0.3 and fed into a press for molding. The pressing pressure is 10-15 MPa, and the pressing time is 1-2 minutes. After pressing, the mixture is cured at 85°C for 35-45 minutes. After curing, the mixture is polished to obtain the quartz stone slab of the present invention.
[0011] Preferably, the stirring speed in step three is 450-550 r / min, and the stirring time is 1-2 h.
[0012] Preferably, the preparation method of the whisker modifier is as follows:
[0013] Silicon carbide whiskers were first added to a 5% lanthanum chloride solution at a weight ratio of 1:5 and ultrasonically dispersed. After ultrasonic treatment, the mixture was filtered and dried.
[0014] Mix 2-5 parts sodium dodecylbenzenesulfonate, 1-3 parts nano silica sol, 2-4 parts yttrium nitrate solution and 3-5 parts chitosan solution to obtain a ball milling agent;
[0015] Mix 6-10 parts of dried silicon carbide whiskers with 4-7 parts of milling agent, and mill them in a ball mill at a speed of 1000-1500 r / min for 1-2 hours. After milling, the whisker modifier is obtained.
[0016] Preferably, the ultrasonic power of the ultrasonic dispersion treatment is 350-400W, and the ultrasonic time is 20-30min.
[0017] Preferably, the yttrium nitrate solution has a mass fraction of 2-5%; the chitosan solution has a mass fraction of 5-8%.
[0018] Preferably, the method for preparing the regulator is as follows:
[0019] Preheat the flake talc powder at 120-130℃ for 10-20 minutes, then cool it to 45-50℃ at a rate of 1-3℃ / min, keep it at that temperature, and set it aside for later use.
[0020] Add 4-7 parts of heat-insulating flake talc, 1-3 parts of sodium lignosulfonate, and 2-5 parts of glycolic acid to 10-15 parts of sodium citrate solution, then add 0.35-0.45 parts of diethanolamine, stir thoroughly, wash with water, and dry to obtain the regulator.
[0021] Preferably, the sodium citrate solution has a mass fraction of 10-15%.
[0022] Preferably, the modified liquid is prepared by:
[0023] Mix the silane coupling agent and dopamine hydrochloride solution at a weight ratio of 1:4, then add 1-4% sodium lignosulfonate of the total silane coupling agent, followed by 2-4% phosphate buffer solution of the total silane coupling agent, and stir until fully mixed to obtain the modified solution.
[0024] Preferably, the mass concentration of the dopamine hydrochloride solution is 1-1.2 mol / L; and the pH value of the phosphate buffer solution is 5.0-5.5.
[0025] Preferably, the silane coupling agent is silane coupling agent KH560.
[0026] Compared with the prior art, the present invention has the following beneficial effects:
[0027] The present invention discloses a method for preparing quartz stone slabs. Waste quartz sand is pretreated with hydrochloric acid solution, then whisker modifiers and regulators are used to synergistically enhance the performance of the system. The system is further modified by stirring in the modified solution to optimize the interfacial properties between the raw materials. Finally, unsaturated polyester resin and methyl ethyl ketone peroxide are added, and the quartz stone slabs are then pressed, molded, and cured. The resulting quartz stone slabs exhibit improved strength and wear resistance, as well as significantly enhanced acid corrosion resistance, thus improving the product's efficiency. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] This embodiment of a method for preparing quartz stone slabs using recycled materials includes the following steps:
[0030] Step 1: Soak the waste quartz sand in a hydrochloric acid solution with a concentration of 1-1.2 mol / L for 15-25 minutes, then wash it with clean water 1-3 times and dry it.
[0031] Step 2: Grind the dried quartz sand from Step 1 through a ball mill to a mesh size of 100. Then mix 50-60 parts of the ball-milled quartz sand, 15-20 parts of whisker modifier, and 4-6 parts of regulator.
[0032] Step 3: Add the product from Step 2 to 45-50 parts of the modified liquid and stir to modify it. After stirring, the matrix agent is obtained.
[0033] Step four: The matrix agent, unsaturated polyester resin, and methyl ethyl ketone peroxide are mixed in a weight ratio of 10:2:0.3 and fed into a press for molding. The pressing pressure is 10-15 MPa, and the pressing time is 1-2 minutes. After pressing, the mixture is cured at 85°C for 35-45 minutes. After curing, the mixture is polished to obtain the quartz stone slab of the present invention.
[0034] In this embodiment, the stirring speed for step three of the stirring modification is 450-550 r / min, and the stirring time is 1-2 h.
[0035] The preparation method of the whisker modifier in this embodiment is as follows:
[0036] Silicon carbide whiskers were first added to a 5% lanthanum chloride solution at a weight ratio of 1:5 and ultrasonically dispersed. After ultrasonic treatment, the mixture was filtered and dried.
[0037] Mix 2-5 parts sodium dodecylbenzenesulfonate, 1-3 parts nano silica sol, 2-4 parts yttrium nitrate solution and 3-5 parts chitosan solution to obtain a ball milling agent;
[0038] Mix 6-10 parts of dried silicon carbide whiskers with 4-7 parts of milling agent, and mill them in a ball mill at a speed of 1000-1500 r / min for 1-2 hours. After milling, the whisker modifier is obtained.
[0039] In this embodiment, the ultrasonic power for ultrasonic dispersion is 350-400W, and the ultrasonic time is 20-30min.
[0040] In this embodiment, the yttrium nitrate solution has a mass fraction of 2-5%, and the chitosan solution has a mass fraction of 5-8%.
[0041] The preparation method of the regulator in this embodiment is as follows:
[0042] Preheat the flake talc powder at 120-130℃ for 10-20 minutes, then cool it to 45-50℃ at a rate of 1-3℃ / min, keep it at that temperature, and set it aside for later use.
[0043] Add 4-7 parts of heat-insulating flake talc, 1-3 parts of sodium lignosulfonate, and 2-5 parts of glycolic acid to 10-15 parts of sodium citrate solution, then add 0.35-0.45 parts of diethanolamine, stir thoroughly, wash with water, and dry to obtain the regulator.
[0044] The sodium citrate solution in this embodiment has a mass fraction of 10-15%.
[0045] The preparation method of the modified liquid in this embodiment is as follows:
[0046] Mix the silane coupling agent and dopamine hydrochloride solution at a weight ratio of 1:4, then add 1-4% sodium lignosulfonate of the total silane coupling agent, followed by 2-4% phosphate buffer solution of the total silane coupling agent, and stir until fully mixed to obtain the modified solution.
[0047] In this embodiment, the mass concentration of the dopamine hydrochloride solution is 1-1.2 mol / L; the pH value of the phosphate buffer solution is 5.0-5.5.
[0048] The silane coupling agent in this embodiment is silane coupling agent KH560.
[0049] Example 1.
[0050] This embodiment of a method for preparing quartz stone slabs using recycled materials includes the following steps:
[0051] Step 1: Soak the waste quartz sand in a 1 mol / L hydrochloric acid solution for 15 minutes, then wash it once with clean water and dry it.
[0052] Step 2: Grind the dried quartz sand from Step 1 through a ball mill to a mesh size of 100. Then mix and stir 50 parts of the ball-milled quartz sand, 15 parts of whisker modifier, and 4 parts of regulator.
[0053] Step 3: The product from Step 2 is added to 45 parts of the modified liquid and stirred for modification. After stirring is completed, the matrix agent is obtained.
[0054] Step four: The matrix agent, unsaturated polyester resin, and methyl ethyl ketone peroxide are mixed in a weight ratio of 10:2:0.3 and fed into a press to be pressed into shape. The pressing pressure is 10 MPa and the pressing time is 1 minute. After pressing, the mixture is cured at 85°C for 35 minutes. After curing, the mixture is polished to obtain the quartz stone slab of the present invention.
[0055] In this embodiment, the stirring speed for step three of the stirring modification is 450 r / min, and the stirring time is 1 h.
[0056] The preparation method of the whisker modifier in this embodiment is as follows:
[0057] Silicon carbide whiskers were first added to a 5% lanthanum chloride solution at a weight ratio of 1:5 and ultrasonically dispersed. After ultrasonic treatment, the mixture was filtered and dried.
[0058] Two parts sodium dodecylbenzenesulfonate, one part nano silica sol, two parts yttrium nitrate solution, and three to five parts chitosan solution were stirred and mixed to obtain a ball milling agent;
[0059] Six parts of dried silicon carbide whiskers and four parts of milling agent were mixed and milled in a ball mill at a speed of 1000 r / min for 1 hour. The whisker modifier was obtained after the milling was completed.
[0060] In this embodiment, the ultrasonic power for ultrasonic dispersion treatment is 350W, and the ultrasonic time is 20min.
[0061] In this embodiment, the yttrium nitrate solution has a mass fraction of 2%, and the chitosan solution has a mass fraction of 5%.
[0062] The preparation method of the regulator in this embodiment is as follows:
[0063] Preheat the flake talc powder at 120℃ for 10 minutes, then cool it to 45℃ at a rate of 1℃ / min, keep it at that temperature, and set it aside for later use.
[0064] Add 4 parts of heat-insulating flake talc, 1 part of sodium lignosulfonate, and 2 parts of glycolic acid to 10 parts of sodium citrate solution, then add 0.35 parts of diethanolamine, stir thoroughly, wash with water, and dry to obtain the regulator.
[0065] The sodium citrate solution in this embodiment has a mass fraction of 10%.
[0066] The preparation method of the modified liquid in this embodiment is as follows:
[0067] Mix the silane coupling agent and dopamine hydrochloride solution at a weight ratio of 1:4, then add sodium lignosulfonate at 1% of the total amount of silane coupling agent, followed by phosphate buffer solution at 2% of the total amount of silane coupling agent, and stir until fully mixed to obtain the modified solution.
[0068] In this embodiment, the mass concentration of the dopamine hydrochloride solution is 1 mol / L; the pH value of the phosphate buffer solution is 5.0.
[0069] The silane coupling agent in this embodiment is silane coupling agent KH560.
[0070] Example 2.
[0071] This embodiment of a method for preparing quartz stone slabs using recycled materials includes the following steps:
[0072] Step 1: Soak the waste quartz sand in a 1.2 mol / L hydrochloric acid solution for 25 minutes, then wash it three times with clean water and dry it.
[0073] Step 2: Grind the dried quartz sand from Step 1 through a ball mill to a mesh size of 100. Then mix and stir 60 parts of the ball-milled quartz sand, 20 parts of whisker modifier, and 6 parts of regulator.
[0074] Step 3: The product from Step 2 is added to 50 parts of the modified liquid and stirred for modification. After stirring is completed, the matrix agent is obtained.
[0075] Step four: The matrix agent, unsaturated polyester resin, and methyl ethyl ketone peroxide are mixed in a weight ratio of 10:2:0.3 and fed into a press for molding. The pressing pressure is 15 MPa, and the pressing time is 2 minutes. After pressing, the mixture is cured at 85°C for 45 minutes. After curing, the mixture is polished to obtain the quartz stone slab of the present invention.
[0076] In this embodiment, the stirring speed for step three of the stirring modification is 550 r / min, and the stirring time is 2 h.
[0077] The preparation method of the whisker modifier in this embodiment is as follows:
[0078] Silicon carbide whiskers were first added to a 5% lanthanum chloride solution at a weight ratio of 1:5 and ultrasonically dispersed. After ultrasonic treatment, the mixture was filtered and dried.
[0079] Five parts sodium dodecylbenzenesulfonate, three parts nano silica sol, four parts yttrium nitrate solution, and five parts chitosan solution were stirred and mixed to obtain a ball milling agent;
[0080] Ten parts of dried silicon carbide whiskers and seven parts of milling agent were mixed and milled in a ball mill at a speed of 1500 r / min for 2 hours. After milling, the whisker modifier was obtained.
[0081] In this embodiment, the ultrasonic power for ultrasonic dispersion treatment is 400W, and the ultrasonic time is 30min.
[0082] In this embodiment, the yttrium nitrate solution has a mass fraction of 5%, and the chitosan solution has a mass fraction of 8%.
[0083] The preparation method of the regulator in this embodiment is as follows:
[0084] Preheat the flake talc powder at 130℃ for 20 minutes, then cool it to 50℃ at a rate of 3℃ / min, keep it at that temperature, and set it aside for later use.
[0085] Add 7 parts of heat-insulating flake talc, 3 parts of sodium lignosulfonate, and 5 parts of glycolic acid to 15 parts of sodium citrate solution, then add 0.45 parts of diethanolamine, stir thoroughly, wash with water, and dry to obtain the regulator.
[0086] The sodium citrate solution in this embodiment has a mass fraction of 15%.
[0087] The preparation method of the modified liquid in this embodiment is as follows:
[0088] The silane coupling agent and dopamine hydrochloride solution were mixed at a weight ratio of 1:4. Then, sodium lignosulfonate (4% of the total silane coupling agent) was added, followed by phosphate buffer solution (4% of the total silane coupling agent). The mixture was stirred until fully incorporated to obtain the modified solution.
[0089] In this embodiment, the mass concentration of the dopamine hydrochloride solution is 1.2 mol / L; the pH value of the phosphate buffer solution is 5.5.
[0090] The silane coupling agent in this embodiment is silane coupling agent KH560.
[0091] Example 3.
[0092] This embodiment of a method for preparing quartz stone slabs using recycled materials includes the following steps:
[0093] Step 1: Soak the waste quartz sand in a 1.1 mol / L hydrochloric acid solution for 20 minutes, then wash it twice with clean water and dry it.
[0094] Step 2: The dried quartz sand from Step 1 is ball-milled through a 100-mesh mill. Then, 55 parts of the ball-milled quartz sand, 17.5 parts of whisker modifier, and 5 parts of regulator are mixed and stirred.
[0095] Step 3: The product from Step 2 is added to 47.5 parts of the modified liquid and stirred for modification. After stirring is completed, the matrix agent is obtained.
[0096] Step four: The matrix agent, unsaturated polyester resin, and methyl ethyl ketone peroxide are mixed in a weight ratio of 10:2:0.3 and fed into a press for molding. The pressing pressure is 12.5 MPa, and the pressing time is 1.5 min. After pressing, the mixture is cured at 85°C for 40 min. After curing, the mixture is polished to obtain the quartz stone slab of the present invention.
[0097] In this embodiment, the stirring speed for step three of the stirring modification is 500 r / min, and the stirring time is 1.5 h.
[0098] The preparation method of the whisker modifier in this embodiment is as follows:
[0099] Silicon carbide whiskers were first added to a 5% lanthanum chloride solution at a weight ratio of 1:5 and ultrasonically dispersed. After ultrasonic treatment, the mixture was filtered and dried.
[0100] 3.5 parts sodium dodecylbenzenesulfonate, 2 parts nano silica sol, 3 parts yttrium nitrate solution and 4 parts chitosan solution were stirred and mixed to obtain a ball milling agent;
[0101] Eight parts of dried silicon carbide whiskers and 5.5 parts of milling agent were mixed and milled in a ball mill at a speed of 1250 r / min for 1.5 h. After milling, the whisker modifier was obtained.
[0102] In this embodiment, the ultrasonic power for ultrasonic dispersion treatment is 370W, and the ultrasonic time is 25min.
[0103] In this embodiment, the yttrium nitrate solution has a mass fraction of 3.5%, and the chitosan solution has a mass fraction of 5-8%.
[0104] The preparation method of the regulator in this embodiment is as follows:
[0105] Preheat the flake talc powder at 125℃ for 15 minutes, then cool it to 47.5℃ at a rate of 2℃ / min, keep it at that temperature, and set it aside for later use.
[0106] Add 5.5 parts of heat-insulating flake talc, 2 parts of sodium lignosulfonate, and 3.5 parts of glycolic acid to 12.5 parts of sodium citrate solution, then add 0.40 parts of diethanolamine, stir thoroughly, wash with water, and dry to obtain the regulator.
[0107] The sodium citrate solution in this embodiment has a mass fraction of 12.5%.
[0108] The preparation method of the modified liquid in this embodiment is as follows:
[0109] The silane coupling agent and dopamine hydrochloride solution were mixed at a weight ratio of 1:4. Then, sodium lignosulfonate (2.5% of the total silane coupling agent) was added, followed by phosphate buffer solution (3% of the total silane coupling agent). The mixture was stirred until fully incorporated to obtain the modified solution.
[0110] In this embodiment, the mass concentration of the dopamine hydrochloride solution is 1.1 mol / L; the pH value of the phosphate buffer solution is 5.2.
[0111] The silane coupling agent in this embodiment is silane coupling agent KH560.
[0112] Comparative Example 1.
[0113] Unlike Example 3, no whisker modifier was added.
[0114] Comparative Example 2.
[0115] Unlike Example 3, the whisker modifier was not treated with a ball milling agent.
[0116] Comparative Example 3.
[0117] Unlike Example 3, no regulator was added.
[0118] Comparative Example 4.
[0119] Unlike Example 3, sodium lignosulfonate and glycolic acid were not added to the regulator.
[0120] Comparative Example 5.
[0121] Unlike Example 3, no modified liquid was used.
[0122] Comparative Example 6.
[0123] Unlike Example 3, no silane coupling agent or sodium lignosulfonate was added during the preparation of the modified liquid.
[0124] The performance of Examples 1-3 and Comparative Examples 1-6 of the present invention was tested as follows.
[0125]
[0126] As can be seen from Examples 1-3 and Comparative Examples 1-6, the wear resistance and flexural strength of the product of the present invention can be improved in a coordinated manner, and the product has excellent performance stability under acid corrosion conditions.
[0127] The performance of the product is significantly reduced if any of the following are not added: whisker modifier, regulator, or modifying liquid. Furthermore, the performance of the product tends to deteriorate if the whisker modifier is not treated with a ball milling agent, the regulator is not sodium lignosulfonate or glycolic acid, or the modifying liquid is not prepared with a silane coupling agent or sodium lignosulfonate. Only the whisker modifier, regulator, and modifying liquid prepared using the method of this invention exhibit the most significant performance improvement.
[0128] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.
[0129] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A method for preparing quartz stone slabs using recycled materials as raw materials, characterized in that, Includes the following steps: Step 1: Soak the waste quartz sand in a hydrochloric acid solution with a concentration of 1-1.2 mol / L for 15-25 minutes, then wash it with clean water 1-3 times and dry it. Step 2: Grind the dried quartz sand from Step 1 through a ball mill to a mesh size of 100. Then mix 50-60 parts of the ball-milled quartz sand, 15-20 parts of whisker modifier, and 4-6 parts of regulator. Step 3: Add the product from Step 2 to 45-50 parts of the modified liquid and stir to modify it. After stirring, the matrix agent is obtained. Step 4: The matrix agent, unsaturated polyester resin, and methyl ethyl ketone peroxide are mixed in a weight ratio of 10:2:0.3 and fed into a press to be pressed into shape. The pressing pressure is 10-15 MPa and the pressing time is 1-2 minutes. After pressing, the mixture is cured at 85℃ for 35-45 minutes. After curing, the mixture is polished to obtain quartz stone slabs. The method for preparing the regulator is as follows: Preheat the flake talc powder at 120-130℃ for 10-20 minutes, then cool it to 45-50℃ at a rate of 1-3℃ / min, keep it at that temperature, and set it aside for later use. Add 4-7 parts of heat-insulating flake talc, 1-3 parts of sodium lignosulfonate, and 2-5 parts of glycolic acid to 10-15 parts of sodium citrate solution, then add 0.35-0.45 parts of diethanolamine, stir thoroughly, wash with water, and dry to obtain the regulator. The modified liquid is prepared by: A silane coupling agent and a dopamine hydrochloride solution are mixed at a weight ratio of 1:
4. Then, 1-4% of sodium lignosulfonate (total amount of silane coupling agent) is added, followed by 2-4% of phosphate buffer solution (total amount of silane coupling agent). The mixture is stirred until fully incorporated to obtain the modified solution. The preparation method of the whisker modifier is as follows: Silicon carbide whiskers were first added to a 5% lanthanum chloride solution at a weight ratio of 1:5 and ultrasonically dispersed. After ultrasonic treatment, the mixture was filtered and dried. Mix 2-5 parts sodium dodecylbenzenesulfonate, 1-3 parts nano silica sol, 2-4 parts yttrium nitrate solution and 3-5 parts chitosan solution to obtain a ball milling agent; Mix 6-10 parts of dried silicon carbide whiskers with 4-7 parts of milling agent, and mill them in a ball mill at a speed of 1000-1500 r / min for 1-2 hours. After milling, the whisker modifier is obtained.
2. The method for preparing quartz stone slabs using recycled materials as raw materials according to claim 1, characterized in that, The stirring speed in step three is 450-550 r / min, and the stirring time is 1-2 h.
3. The method for preparing quartz stone slabs using recycled materials as raw materials according to claim 1, characterized in that, The ultrasonic power for ultrasonic dispersion treatment is 350-400W, and the ultrasonic time is 20-30min.
4. The method for preparing quartz stone slabs using recycled materials as raw materials according to claim 1, characterized in that, The yttrium nitrate solution has a mass fraction of 2-5%; the chitosan solution has a mass fraction of 5-8%.
5. The method for preparing quartz stone slabs using recycled materials as raw materials according to claim 1, characterized in that, The sodium citrate solution has a mass fraction of 10-15%.
6. The method for preparing quartz stone slabs using recycled materials as raw materials according to claim 1, characterized in that, The mass concentration of the hydrochloric acid dopamine solution is 1-1.2 mol / L; the pH value of the phosphate buffer solution is 5.0-5.
5.
7. The method for preparing quartz stone slabs using recycled materials as raw materials according to claim 1, characterized in that, The silane coupling agent is silane coupling agent KH560.