A high-hardness and high-toughness bent rock slab and its preparation method

Abstract

A high-hardness and high-toughness bent rock slab according to the present invention comprises the following raw materials in parts by weight: 15-20 parts of kaolin, 15-20 parts of selected ball clay, 10-15 parts of ultra-white sand, 10-15 parts of potassium feldspar, 6-10 parts of diopside modifier, 5-8 parts of calcined talc, 4-7 parts of bentonite-tempered tremolite agent, 0.3-0.4 parts of sodium tripolyphosphate peptizing agent, and 2-5 parts of modified auxiliary agent. The rock slab of the present invention uses raw materials such as kaolin, selected ball clay and ultra-white sand in combination with a diopside modifier and a bentonite-tempered tremolite agent. By coordinating and blending the two, the synergistic effect is achieved, resulting in excellent coordination effects of the toughness, bending performance and hardness performance of the product, as well as remarkable effects of acid corrosion resistance and cold stability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of bent rock slabs, and particularly relates to a high-hardness and high-toughness bent rock slab and a preparation method thereof. Background Art

[0002] Rock slabs are mainly used in the fields of home and kitchen boards. As a new species in the home field, rock slab furniture has characteristics such as large size, strong moldability, diverse colors, high temperature resistance, wear and scratch resistance, anti-permeation, acid and alkali resistance, zero formaldehyde, environmental protection and health compared with other home products.

[0003] The impact toughness and flexural strength performance of existing rock slabs are difficult to coordinate. At the same time, the hardness performance of the products is poor, and the acid corrosion resistance and cold stability of the products are poor, which limits the use efficiency of the products. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a high-hardness and high-toughness bent rock slab and a preparation method thereof to solve the problems raised in the above background art.

[0005] The present invention adopts the following technical solutions to solve the technical problems:

[0006] The present invention provides a high-hardness and high-toughness bent rock slab, which comprises the following raw materials in parts by weight:

[0007] 15-20 parts of kaolin, 15-20 parts of selected ball clay, 10-15 parts of ultra-white sand, 10-15 parts of potassium feldspar, 6-10 parts of diopside modifier, 5-8 parts of calcined talc, 4-7 parts of bentonite blended tremolite agent, 0.3-0.4 part of sodium tripolyphosphate peptizer, 2-5 parts of modified auxiliary agent;

[0008] The modified auxiliary agent is prepared by thoroughly blending 5 parts of cordierite, 5 parts of anorthite, 5 parts of mullite, 5 parts of montmorillonite, and 5 parts of kaolinite.

[0009] Preferably, the rock slab comprises the following raw materials in parts by weight:

[0010] 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of ultra-white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of calcined talc, 5.5 parts of bentonite blended tremolite agent, 0.35 part of sodium tripolyphosphate peptizer, 3.5 parts of modified auxiliary agent.

[0011] Preferably, the preparation method of the diopside modifier is as follows:

[0012] S1: Stir and mix diopside in a sodium citrate solution 3-4 times the total amount of diopside, then add 10-15% of the total amount of diopside of silane coupling agent to the diopside, and continue to stir thoroughly to obtain diopside agent;

[0013] S2: Add 2 - 5 parts of lanthanum chloride solution and 1 - 3 parts of wollastonite into 6 - 8 parts of sodium dodecylbenzenesulfonate solution, and then add 2 - 4 parts of calcined zinc oxide, and stir well to obtain lanthanum solution;

[0014] S3: Add the lanthanum solution into the diopside agent according to the weight ratio of 2:5, and perform co - blending and ball - milling treatment. The ball - milling speed is 1000 - 1500 r / min, ball - mill for 1 h. After the ball - milling is completed, wash with water, filter by suction, and dry to obtain the diopside modifier.

[0015] Preferably, the mass fraction of the sodium citrate solution is 2 - 5%; the silane coupling agent is silane coupling agent KH560.

[0016] Preferably, the mass fraction of the lanthanum chloride solution is 2 - 4%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 5 - 8%.

[0017] Preferably, the preparation method of the calcined zinc oxide is as follows:

[0018] Calcine zinc oxide at 210 - 220 °C for 10 - 15 min, then cool it to 55 - 60 °C at a rate of 2 - 5 °C / min, keep it warm for 5 - 10 min, then immerse it fully in a sufficient amount of cobalt nitrate solution, and then filter by suction and dry to obtain the calcined zinc oxide.

[0019] Preferably, the mass fraction of the cobalt nitrate solution is 2 - 5%.

[0020] Preferably, the immersion power for sufficient immersion is 350 - 400 W, and the immersion time is 20 - 30 min.

[0021] Preferably, the preparation method of the bentonite - blended tremolite agent is as follows:

[0022] S11: Irradiate bentonite in a proton irradiation chamber for 10 - 15 min, and the irradiation power is 350 - 400 W. After the irradiation is completed, obtain the irradiated bentonite;

[0023] S12: Blend and ball - mill 5 - 8 parts of irradiated bentonite, 2 - 3 parts of sodium silicate solution with a mass fraction of 2 - 5%, 1 - 3 parts of dopamine hydrochloride solution with a mass fraction of 4%, and 2 - 4 parts of tremolite. The ball - milling speed is 1000 - 1500 r / min, ball - mill for 1 h. After the ball - milling is completed, wash with water, filter by suction, and dry to obtain the bentonite - blended tremolite agent.

[0024] The present invention also provides a preparation method of a high - hardness and high - toughness bent rock slab, including the following steps:

[0025] Weigh the raw materials by weight parts, subject the raw materials to wet ball milling treatment, with the ball milling speed being 1000 r / min, ball milling for 2 h, then press and form in a mold, with the pressing pressure being 10 MPa, pressing for 20 min, and finally sinter at 1350 °C for 1 h. After the sintering is completed, cool to room temperature to obtain the rock slab.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The rock slab of the present invention uses raw materials such as kaolin, selected ball clay, and ultra-white sand, etc., and is compounded with a diopside modifier and bentonite to reconcile tremolite agent. By coordinating and reconciling the two, they work together to enhance the effect. The obtained product has excellent coordination effects in terms of toughness, bending performance, and hardness performance, as well as remarkable effects in acid corrosion resistance and cold stability; the diopside modifier is treated with diopside in combination with sodium citrate solution and silane coupling agent to optimize the dispersibility and interfacial property of diopside. At the same time, the added lanthanum solution is blended and ball milled for improvement to optimize the performance effect of the system. The lanthanum solution is composed of lanthanum chloride solution and wollastonite. At the same time, through sodium dodecyl benzene sulfonate solution and calcined zinc oxide, through the reconciliation and coordination between raw materials, the performance effect of the reinforcing system is improved. At the same time, the calcined zinc oxide undergoes segmented heat treatment, and then is immersed in a cobalt nitrate solution and subjected to ultrasonic treatment to better reconcile the performance effect of the system. And the bentonite to reconcile tremolite agent is irradiated in a proton irradiation box to stimulate the active efficacy of bentonite. At the same time, it is treated by blending and ball milling with sodium silicate solution, 4% hydrochloric acid dopamine solution by mass fraction, and tremolite. Through the reconciliation and coordination between raw materials, the diopside modifier is reinforced, and thus the performance of the product is further improved. Brief Description of the Drawings

[0028] Figure 1 It is a schematic diagram of differential thermal analysis of the present invention. Detailed Embodiments

[0029] The following combines specific embodiments to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0030] A high-hardness, high-toughness and bendable rock slab in this embodiment includes the following raw materials by weight parts:

[0031] 15-20 parts of kaolin, 15-20 parts of selected ball clay, 10-15 parts of super white sand, 10-15 parts of potassium feldspar, 6-10 parts of diopside modifier, 5-8 parts of calcined talc, 4-7 parts of bentonite and tremolite agent, 0.3-0.4 parts of sodium tripolyphosphate debonding agent, 2-5 parts of modification aid. The modification aid is made by fully blending 5 parts of cordierite, 5 parts of calcium feldspar, 5 parts of mullite, 5 parts of montmorillonite and 5 parts of kaolinite.

[0032] The rock plate of this embodiment includes the following raw materials in parts by weight:

[0033] 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of super white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of burned talc, 5.5 parts of bentonite and tremolite agent, 0.35 parts of sodium tripolyphosphate dissolving agent, and 3.5 parts of modification aid.

[0034] The preparation method of the diopside modifier of this embodiment is:

[0035] S1: Stir and mix diopside in a sodium citrate solution that is 3-4 times the total amount of diopside, then add a silane coupling agent that is 10-15% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent;

[0036] S2: adding 2-5 parts of lanthanum chloride solution and 1-3 parts of wollastonite to 6-8 parts of sodium dodecylbenzene sulfonate solution, and then adding 2-4 parts of calcined zinc oxide, stirring thoroughly to obtain a lanthanum solution;

[0037] S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1000-1500r / min, the ball milling is for 1h, after the ball milling is completed, washing, filtering and drying to obtain the diopside modifier.

[0038] The mass fraction of the sodium citrate solution in this embodiment is 2-5%; the silane coupling agent is silane coupling agent KH560.

[0039] The mass fraction of the lanthanum chloride solution in this embodiment is 2-4%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%.

[0040] The preparation method of calcined zinc oxide in this embodiment is:

[0041] The zinc oxide is calcined at 210-220°C for 10-15 minutes, then reduced to 55-60°C at a rate of 2-5°C / min, kept warm for 5-10 minutes, then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

[0042] The mass fraction of the cobalt nitrate solution in this embodiment is 2-5%.

[0043] In this embodiment, the immersion power for sufficient immersion is 350 - 400 W, and the immersion time is 20 - 30 min.

[0044] The preparation method of the bentonite - blended tremolite agent in this embodiment is as follows:

[0045] S11: Irradiate bentonite in a proton irradiation chamber for 10 - 15 min with an irradiation power of 350 - 400 W. After irradiation, obtain irradiated bentonite.

[0046] S12: Blend and ball - mill 5 - 8 parts of irradiated bentonite, 2 - 3 parts of sodium silicate solution with a mass fraction of 2 - 5%, 1 - 3 parts of hydrochloric acid dopamine solution with a mass fraction of 4%, and 2 - 4 parts of tremolite. The ball - mill rotation speed is 1000 - 1500 r / min, and ball - mill for 1 h. After ball - milling, wash with water, filter by suction, and dry to obtain the bentonite - blended tremolite agent.

[0047] The preparation method of a high - hardness and high - toughness bent rock slab in this embodiment includes the following steps:

[0048] Weigh the raw materials by weight, perform wet ball - milling on the raw materials with a ball - mill rotation speed of 1000 r / min for 2 h, then press and form in a mold with a pressing pressure of 10 MPa for 20 min, and finally sinter at 1350 °C for 1 h. After sintering, cool to room temperature to obtain the rock slab.

[0049] Example 1.

[0050] A high - hardness and high - toughness bent rock slab in this embodiment includes the following raw materials by weight:

[0051] 15 parts of kaolin, 15 parts of selected ball clay, 10 parts of ultra - white sand, 10 parts of potassium feldspar, 6 parts of diopside modifier, 5 parts of calcined talc, 4 parts of bentonite - blended tremolite agent, 0.3 part of sodium tripolyphosphate peptizer, and 2 parts of modified additive.

[0052] The preparation method of the diopside modifier in this embodiment is as follows:

[0053] S1: Stir and mix diopside in a sodium citrate solution that is 3 times the total amount of diopside, then add a silane coupling agent accounting for 10% of the total amount of diopside to the diopside, and continue to stir thoroughly to obtain the diopside agent.

[0054] S2: Add 2 parts of lanthanum chloride solution and 1 part of wollastonite to 6 parts of sodium dodecyl benzene sulfonate solution, and then add 2 parts of calcined zinc oxide, and stir thoroughly to obtain the lanthanum - containing solution.

[0055] S3: Add the lanthanum solution to the diopside agent according to a weight ratio of 2:5, and perform a blending and ball milling treatment. The ball milling speed is 1000 r / min, and the ball milling time is 1 h. After the ball milling is completed, wash with water, filter by suction, and dry to obtain the diopside modifier.

[0056] In this example, the mass fraction of the sodium citrate solution is 2%; the silane coupling agent is silane coupling agent KH560.

[0057] In this example, the mass fraction of the lanthanum chloride solution is 2%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 5%.

[0058] The preparation method of the calcined zinc oxide in this example is as follows:

[0059] Calcine zinc oxide at 210 °C for 10 min, then cool it to 55 °C at a rate of 2 °C / min, keep it warm for 5 min, and then immerse it in a sufficient amount of cobalt nitrate solution until fully immersed. Then filter by suction and dry to obtain the calcined zinc oxide.

[0060] In this example, the mass fraction of the cobalt nitrate solution is 2%.

[0061] In this example, the immersion power for full immersion is 350 W, and the immersion time is 20 min.

[0062] The preparation method of the bentonite - tempered tremolite agent in this example is as follows:

[0063] S11: Irradiate bentonite in a proton irradiation chamber for 10 min, with an irradiation power of 350 W. After the irradiation is completed, obtain the irradiated bentonite;

[0064] S12: Blend and ball - mill 5 parts of the irradiated bentonite, 2 parts of a 2% sodium silicate solution, 1 part of a 4% hydrochloric acid dopamine solution, and 2 parts of tremolite. The ball - milling speed is 1000 r / min, and the ball - milling time is 1 h. After the ball milling is completed, wash with water, filter by suction, and dry to obtain the bentonite - tempered tremolite agent.

[0065] The preparation method of a high - hardness and high - toughness bent rock slab in this example includes the following steps:

[0066] Weigh the raw materials according to parts by weight, perform wet ball - milling treatment on the raw materials. The ball - milling speed is 1000 r / min, and the ball - milling time is 2 h. Then press and form in a mold, with a pressing pressure of 10 MPa and a pressing time of 20 min. Finally, sinter at 1350 °C for 1 h. After the sintering is completed, cool to room temperature to obtain the rock slab.

[0067] Example 2.

[0068] A high - hardness and high - toughness bent rock slab in this example includes the following raw materials by weight:

[0069] 20 parts of kaolin, 20 parts of selected ball clay, 15 parts of super white sand, 15 parts of potassium feldspar, 10 parts of diopside modifier, 8 parts of burned talc, 7 parts of bentonite and tremolite agent, 0.3 parts of sodium tripolyphosphate degumming agent, and 2 parts of modification aid.

[0070] The preparation method of the diopside modifier of this embodiment is:

[0071] S1: Stir and mix diopside in a sodium citrate solution of 4 times the total amount of diopside, then add a silane coupling agent of 15% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent;

[0072] S2: Add 5 parts of lanthanum chloride solution and 3 parts of wollastonite to 8 parts of sodium dodecylbenzene sulfonate solution, then add 4 parts of calcined zinc oxide, and stir thoroughly to obtain a lanthanum solution;

[0073] S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1500r / min, the ball milling is for 1h, and after the ball milling is completed, washing, filtering and drying are performed to obtain the diopside modifier.

[0074] The mass fraction of the sodium citrate solution in this embodiment is 5%; the silane coupling agent is silane coupling agent KH560.

[0075] The mass fraction of the lanthanum chloride solution in this embodiment is 4%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 8%.

[0076] The preparation method of calcined zinc oxide in this embodiment is:

[0077] The zinc oxide was calcined at 220°C for 15 minutes, then the temperature was reduced to 60°C at a rate of 5°C / min, kept warm for 10 minutes, and then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

[0078] The mass fraction of the cobalt nitrate solution in the present embodiment is 5%.

[0079] The immersion power for full immersion in this embodiment is 400 W, and the immersion time is 30 min.

[0080] The preparation method of bentonite and tremolite agent of the present embodiment is:

[0081] S11: irradiating the bentonite in a proton irradiation box for 15 minutes at an irradiation power of 400 W, and obtaining irradiated bentonite after the irradiation is completed;

[0082] S12: Blend and ball-mill 8 parts of irradiated bentonite, 3 parts of a 5% sodium silicate solution by mass fraction, 3 parts of a 4% dopamine hydrochloride solution by mass fraction, and 4 parts of tremolite. The ball-milling speed is 1500 r / min, ball-mill for 1 h. After ball-milling, wash with water, filter by suction, and dry to obtain a bentonite-tremolite conditioner.

[0083] A preparation method of a high-hardness and high-toughness bent rock slab in this example includes the following steps:

[0084] Weigh the raw materials by weight parts, wet ball-mill the raw materials. The ball-milling speed is 1000 r / min, ball-mill for 2 h, then press and form in a mold. The pressing pressure is 10 MPa, press for 20 min, and finally sinter at 1350 °C for 1 h. After sintering, cool to room temperature to obtain the rock slab.

[0085] Example 3.

[0086] A high-hardness and high-toughness bent rock slab in this example includes the following raw materials by weight parts:

[0087] 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of ultra-white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of calcined talc, 5.5 parts of bentonite-tremolite conditioner, 0.3 part of sodium tripolyphosphate peptizer, 2 parts of modification assistant.

[0088] The preparation method of the diopside modifier in this example is as follows:

[0089] S1: Stir and mix diopside in a sodium citrate solution 3.5 times the total amount of diopside, then add a silane coupling agent accounting for 12.5% of the total amount of diopside to the diopside, and continue to stir thoroughly to obtain a diopside agent;

[0090] S2: Add 3.5 parts of lanthanum chloride solution and 2 parts of wollastonite to 7 parts of sodium dodecylbenzenesulfonate solution, and then add 3 parts of calcined zinc oxide, and stir thoroughly to obtain a lanthanum-containing solution;

[0091] S3: Add the lanthanum-containing solution to the diopside agent according to a weight ratio of 2:5, blend and ball-mill. The ball-milling speed is 1250 r / min, ball-mill for 1 h. After ball-milling, wash with water, filter by suction, and dry to obtain the diopside modifier.

[0092] The mass fraction of the sodium citrate solution in this example is 3.5%; the silane coupling agent is silane coupling agent KH560.

[0093] The mass fraction of the lanthanum chloride solution in this example is 3%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 6.5%.

[0094] The preparation method of the calcined zinc oxide in this example is as follows:

[0095] Calcine zinc oxide at 215 °C for 12.5 min, then cool it to 57 °C at a rate of 3.5 °C / min, hold the temperature for 7.5 min, and then immerse it in a sufficient amount of cobalt nitrate solution until fully immersed. Subsequently, filter by suction and dry to obtain calcined zinc oxide.

[0096] The mass fraction of the cobalt nitrate solution in this example is 3.5%.

[0097] The immersion power for sufficient immersion in this example is 375 W, and the immersion time is 25 min.

[0098] The preparation method of the bentonite - blended tremolite agent in this example is as follows:

[0099] S11: Irradiate bentonite in a proton irradiation chamber for 12.5 min with an irradiation power of 375 W. After irradiation, obtain irradiated bentonite;

[0100] S12: Blend and ball - mill 6.5 parts of irradiated bentonite, 2.5 parts of a sodium silicate solution with a mass fraction of 3.5%, 2 parts of a hydrochloric acid dopamine solution with a mass fraction of 4%, and 3 parts of tremolite. The ball - milling speed is 1250 r / min, ball - mill for 1 h. After ball - milling, wash, filter by suction, and dry to obtain the bentonite - blended tremolite agent.

[0101] The preparation method of a high - hardness and high - toughness bent rock slab in this example includes the following steps:

[0102] Weigh the raw materials by weight, subject the raw materials to wet ball - milling with a ball - milling speed of 1000 r / min for 2 h, then press and form in a mold with a pressing pressure of 10 MPa for 20 min, and finally sinter at 1350 °C for 1 h. After sintering, cool to room temperature to obtain the rock slab.

[0103] Comparative Example 1.

[0104] It is different from Example 3 in that no diopside modifier is added.

[0105] Comparative Example 2.

[0106] It is different from Example 3 in that no lanthanum solution is added in the preparation of the diopside modifier.

[0107] Comparative Example 3.

[0108] It is different from Example 3 in that no calcined zinc oxide is added in the preparation of the lanthanum solution.

[0109] Comparative Example 4.

[0110] It is different from Example 3 in that calcined zinc oxide is directly replaced with zinc oxide raw material.

[0111] Comparative Example 5.

[0112] Different from Example 3, lanthanum chloride solution and wollastonite were not added to the lanthanum solution.

[0113] Comparative Example 6.

[0114] Different from Example 3, diopside agent was replaced with diopside.

[0115] Comparative Example 7.

[0116] Different from Example 3, bentonite was not added to blend tremolite agent.

[0117] Comparative Example 8.

[0118] Different from Example 3, the treatment of Step S12 was not adopted for the bentonite-blended tremolite agent.

[0119] The products of Examples 1 - 3 and Comparative Examples 1 - 8 were subjected to performance tests. At the same time, the products were placed at -5°C for 12 h, and then placed under the condition of 2% hydrochloric acid mist for 24 h to test the cold and acid corrosion resistance of the products;

[0120]

[0121] It can be seen from Comparative Examples 1 - 8 and Examples 1 - 3 that the product of Example 3 has excellent impact toughness, flexural strength and hardness properties. At the same time, the cold and acid corrosion resistance stability effect of the product is remarkable;

[0122] If one of the diopside modifier and the bentonite-blended tremolite agent is not added in the present invention, the performance of the product deteriorates significantly. By using the synergistic combination of the two, the product performance effect is remarkable;

[0123] When lanthanum solution is not added in the preparation of the diopside modifier, when calcined zinc oxide is not added in the preparation of the lanthanum solution, when calcined zinc oxide is directly replaced with zinc oxide raw material, when lanthanum chloride solution and wollastonite are not added to the lanthanum solution, and when the diopside agent is replaced with diopside, the performance of the product shows a deteriorating trend. Only the diopside modifier obtained by treating with the lanthanum solution and diopside agent of the present invention has a remarkable product performance improvement effect; at the same time, when the treatment of Step S12 is not adopted for the bentonite-blended tremolite agent, the performance of the product also shows a deteriorating trend;

[0124] By using the specific process treatment of the present invention, the impact toughness, flexural strength and hardness properties of the prepared product are coordinately improved. At the same time, the cold and acid corrosion resistance stability effect of the product is remarkable. The effects of the present invention cannot be achieved by using other methods to replace.

[0125] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0126] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard 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 high-hardness and high-toughness curved rock plate, characterized in that: It includes the following raw materials in parts by weight: 15-20 parts of kaolin, 15-20 parts of selected ball clay, 10-15 parts of super white sand, 10-15 parts of potassium feldspar, 6-10 parts of diopside modifier, 5-8 parts of calcined talc, 4-7 parts of bentonite and tremolite agent, 0.3-0.4 parts of sodium tripolyphosphate dissolving agent, 2-5 parts of modification auxiliary agent; The preparation method of the diopside modifier is: S1: Stir and mix diopside in a sodium citrate solution that is 3-4 times the total amount of diopside, then add a silane coupling agent that is 10-15% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent; S2: adding 2-5 parts of lanthanum chloride solution and 1-3 parts of wollastonite to 6-8 parts of sodium dodecylbenzene sulfonate solution, and then adding 2-4 parts of calcined zinc oxide, stirring thoroughly to obtain a lanthanum solution; S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1000-1500r / min, the ball milling is 1h, after the ball milling is completed, washing, filtering and drying to obtain the diopside modifier; The preparation method of calcined zinc oxide is: The zinc oxide is calcined at 210-220°C for 10-15 minutes, then the temperature is reduced to 55-60°C at a rate of 2-5°C / min, and the temperature is kept for 5-10 minutes, and then the zinc oxide is immersed in a sufficient amount of cobalt nitrate solution, and then filtered and dried to obtain calcined zinc oxide; The preparation method of the bentonite-tremolite agent is as follows: S11: irradiating the bentonite in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated bentonite after the irradiation is completed; S12: 5-8 parts of irradiated bentonite, 2-3 parts of 2-5% by mass sodium silicate solution, 1-3 parts of 4% by mass dopamine hydrochloride solution and 2-4 parts of tremolite are mixed and ball-milled at a ball-milling speed of 1000-1500 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain bentonite-tremolite agent.

2. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The rock plate includes the following raw materials in parts by weight: 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of super white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of burned talc, 5.5 parts of bentonite and tremolite agent, 0.35 parts of sodium tripolyphosphate dissolving agent, and 3.5 parts of modification aid.

3. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The mass fraction of the sodium citrate solution is 2-5%; the silane coupling agent is silane coupling agent KH560.

4. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The mass fraction of the lanthanum chloride solution is 2-4%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%.

5. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The mass fraction of the cobalt nitrate solution is 2-5%.

6. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The immersion is fully immersion ultrasonic treatment, the immersion power is 350-400W, and the immersion time is 20-30min.

7. A method for preparing a high-hardness and high-toughness curved rock plate as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: The raw materials were weighed according to their weight, and wet-milled at a speed of 1000 r / min for 2 h. They were then pressed in a mold at a pressure of 10 MPa for 20 min. Finally, they were sintered at 1350°C for 1 h. After sintering, they were cooled to room temperature to obtain a rock slab.

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