High-temperature-resistant and wear-resistant blanket

Abstract

The invention discloses a high-temperature-resistant and wear-resistant blanket. The preparation method of the high-temperature-resistant and wear-resistant blanket comprises the following steps that S1, high-purity aluminum silicate fibers and silicon carbide mullite fibers are prepared into a cotton blank through a cotton collecting procedure; s2, the cotton blank is subjected to light burning shaping and then cut, and a shaped cotton blank is prepared; s3, silicon carbide slurry is prepared, the surface of the shaped cotton blank is coated with the silicon carbide slurry, it is ensured that the permeation thickness of the slurry is 5 mm or above, and a slurry-coated cotton blank is prepared; s4, performing light burning and shaping on the pulp coated cotton blank, and then needling to prepare a blanket to prepare a fiber blanket blank; and S5, the fiber blanket blank prepared in the step S4 is subjected to high-temperature sintering treatment, and the high-temperature-resistant and wear-resistant blanket is prepared. The preparation process is relatively simple, the high temperature resistance and the heat insulation performance are better, and the high temperature wear resistance is also better.

Description

Technical Field

[0001] The present application relates to the technical field of refractory materials, and in particular to a high-temperature resistant and wear-resistant blanket. Background Art

[0002] An industrial furnace primarily refers to a type of thermal energy equipment that utilizes fuel combustion to convert chemical energy into thermal energy, which is then used to heat workpieces to meet production requirements. The lining is a core component of an industrial furnace, and its performance directly determines its performance, operational failure rate, operating efficiency, and energy consumption. Industrial furnace linings are generally made of refractory materials and serve as thermal insulation components. They can be categorized by the material used, including brick linings, fiber linings, and amorphous material linings.

[0003] With the advent of high-temperature refractory fibers, they have become the preferred material for industrial furnace linings due to their numerous advantages, including low density, minimal heat loss, excellent thermal insulation, long service life, no need for oven drying, and easy installation. Currently, various refractory fiber blankets made from high-temperature refractory fibers are often used in the manufacture of various industrial furnaces, as well as for energy-saving retrofits of older industrial furnaces. Aluminosilicate fibers, due to their low price and excellent high-temperature resistance, are currently the preferred fiber material for refractory fiber blankets. For example, high-purity aluminosilicate fiber needle-punched blankets are a widely used type of refractory fiber blanket. Depending on the operating temperature requirements, high-aluminum and zirconium-containing aluminosilicate fiber needle-punched blankets are also widely used in industrial furnaces.

[0004] However, some existing specialized industrial furnaces also place high demands on the wear resistance of their linings. For example, converters in the metallurgical industry are constantly eroded by molten steel during operation, causing high-temperature erosion and wear. Another example is cement kilns in the cement manufacturing industry, where clinker particles carried by high-pressure gases are eroded by the lining during operation, causing high-temperature erosion and wear. For these specialized industrial furnaces, existing refractory fiber blankets, primarily composed of aluminum silicate fibers, have limited resistance to high-temperature wear and tear, resulting in a relatively short service life. Summary of the Invention

[0005] In order to solve at least one of the above technical problems, an industrial furnace lining material with a relatively simple preparation process, good high temperature resistance and thermal insulation performance, and also good high temperature wear resistance is developed. The present application provides a high temperature resistant and wear-resistant blanket.

[0006] In one aspect, the present application provides a method for preparing a high-temperature resistant and wear-resistant blanket, comprising the following steps:

[0007] S1. High-purity aluminum silicate fiber and silicon carbide mullite fiber are made into cotton blanks through a cotton collection process;

[0008] S2, lightly burning the cotton blank obtained in step S1 to set the shape, and then cutting it to obtain a shaped cotton blank;

[0009] S3, preparing silicon carbide slurry, coating the surface of the shaped cotton blank prepared in step S2 with the silicon carbide slurry, ensuring that the slurry has a penetration thickness of more than 5 mm, to obtain a slurry-coated cotton blank;

[0010] S4, lightly calcining the sizing cotton blank obtained in step S3 to set the shape, and then needle punching the blanket to obtain a fiber blanket blank;

[0011] S5. The fiber blanket blank obtained in step S4 is subjected to high-temperature sintering treatment to obtain a high-temperature resistant and wear-resistant blanket.

[0012] Optionally, in step S1, the mass ratio of high-purity aluminum silicate fiber to silicon carbide mullite fiber is 3 to 4:1.

[0013] Optionally, in step S1, the silicon carbide mullite fiber is prepared by the following steps:

[0014] Sa, mixing aluminum isopropoxide and tetraethyl orthosilicate in a molar ratio of 7:4-5, and hydrolyzing to obtain a mixed sol;

[0015] Sb, adding polyvinyl alcohol accounting for 10-20% of the total mass of the mixed sol to the mixed sol prepared in step Sa, and mixing thoroughly to prepare a colloidal liquid;

[0016] Sc. The colloidal liquid obtained in step Sb is dipped on the surface of the silicon carbide long fiber, heated at 600-650°C for shaping, and then sintered at 1250-1300°C. After cooling, the fiber is cut into short fibers with a length of 5-15 mm to obtain silicon carbide mullite fiber.

[0017] Optionally, in step S1, the high-purity aluminum silicate fibers are short fibers with a length of 4 to 18 mm.

[0018] Optionally, in step S2, the temperature of the light sintering is 650-700° C. and the time is more than 30 minutes.

[0019] Optionally, in step S3, the proportions of the components of the silicon carbide slurry include: 72-80 parts of nano-silicon carbide, 8-12 parts of nano-alumina, 6-10 parts of nano-silicon dioxide, 2-4 parts of nano-yttrium oxide, and 15-20 parts of ethylene glycol.

[0020] Optionally, in step S4, the temperature of the light sintering is 650-700° C. and the time is more than 30 minutes.

[0021] Optionally, in step S5, the high-temperature sintering temperature is 1300-1340° C. and the time is more than 8 hours.

[0022] Optionally, in step S5, the heating rate of high-temperature sintering is 12-18°C / min.

[0023] On the other hand, the present application provides a high-temperature resistant and wear-resistant blanket, which is prepared using the above-mentioned preparation method of the high-temperature resistant and wear-resistant blanket.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects:

[0025] 1. This application uses high-purity aluminum silicate fiber as the main material, mixed with some silicon carbide mullite fiber to make a refractory fiber blanket. After the two fibers are mixed, not only the high-temperature resistance is improved to a certain extent, but also the weight of the refractory fiber blanket can be effectively reduced, and the overall strength is also improved to a certain extent.

[0026] 2. The present application incorporates some silicon carbide mullite fibers, and the wear resistance of the refractory fiber blanket produced is significantly improved. The wear resistance at both room temperature and high temperature is significantly improved compared to various existing aluminum silicate fiber blankets.

[0027] 3. After mixing in some silicon carbide mullite fibers, the present application also coats and infiltrates silicon carbide slurry on the surface of the fiber blanket cotton blank. After sintering, a hard refractory layer can be formed on the surface of the refractory fiber blanket, which can further improve the room temperature and high temperature wear resistance of the refractory fiber blanket. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the embodiments.

[0029] The present application provides a method for preparing a high-temperature resistant and wear-resistant blanket, comprising the following steps:

[0030] S1. High-purity aluminum silicate fiber and silicon carbide mullite fiber are made into cotton blanks through a cotton collection process;

[0031] S2, lightly burning the cotton blank obtained in step S1 to set the shape, and then cutting it to obtain a shaped cotton blank;

[0032] S3, preparing silicon carbide slurry, coating the surface of the shaped cotton blank prepared in step S2 with the silicon carbide slurry, ensuring that the slurry has a penetration thickness of more than 5 mm, to obtain a slurry-coated cotton blank;

[0033] S4, lightly calcining the sizing cotton blank obtained in step S3 to set the shape, and then needle punching the blanket to obtain a fiber blanket blank;

[0034] S5. The fiber blanket blank obtained in step S4 is subjected to high-temperature sintering treatment to obtain a high-temperature resistant and wear-resistant blanket.

[0035] In order to solve the problems existing in the prior art, the present application improves the existing aluminum silicate fiber blanket, mixes in some silicon carbide mullite fibers, and attaches a silicon carbide hardening layer to the surface. After the two fibers are mixed, the high temperature resistance and heat insulation performance of the obtained fiber blanket are improved to a certain extent. After the surface hardening layer is attached, the refractory fiber blanket has a higher surface hardness, and the wear resistance can be significantly improved. The present application mixes in some silicon carbide mullite fibers, and the hardening layer is sintered with silicon carbide slurry, so that the hardening layer and the fiber have better bonding strength, and the hardening layer is not easy to fall off under high temperature impact.

[0036] The following are preparation examples and examples of this application.

[0037] The main raw materials used in the examples of this application are all commercially available.

[0038] Among them, high-purity aluminum silicate fiber was purchased from Zhengzhou Shengshi Jinding Insulation and Refractory Materials Co., Ltd.; silicon carbide long fiber was purchased from Shanghai Xiangtian Nanomaterials Co., Ltd.; nano silicon carbide was purchased from Beijing Dekedao Gold Technology Co., Ltd.; nano alumina was purchased from Beijing Dekedao Gold Technology Co., Ltd.; nano silicon dioxide was purchased from Beijing Dekedao Gold Technology Co., Ltd.; nano yttrium oxide was purchased from Beijing Dekedao Gold Technology Co., Ltd.; aluminum isopropoxide, with a purity of more than 99%, was purchased from Yangzhou Zhongtianli New Materials Co., Ltd.; tetraethyl orthosilicate, with a purity of more than 99%, was purchased from Nanjing Chemical Reagent Co., Ltd.; polyvinyl alcohol was purchased from Hubei Rishengchang New Materials Technology Co., Ltd.; ethylene glycol, Jinan Xinying Chemical Co., Ltd.

[0039] Preparation Example 1

[0040] The silicon carbide mullite fiber of this preparation example is prepared by the following steps:

[0041] Sa, mixing aluminum isopropoxide and tetraethyl orthosilicate in a molar ratio of 7:4, and hydrolyzing them to prepare a mixed sol;

[0042] Sb, adding polyvinyl alcohol accounting for 10% of the total mass of the mixed sol to the mixed sol prepared in step Sa, and mixing thoroughly to prepare a colloidal liquid;

[0043] Sc. The colloidal liquid obtained in step Sb is dipped on the surface of the silicon carbide long fiber, placed in a sintering furnace, and heated to above 600°C at a heating rate of 15°C / min, and then the temperature is controlled at 600-650°C, kept warm for 30 minutes, and heated to shape; after heating and shaping, the temperature is increased to above 1250°C at a heating rate of 15°C / min, and then the temperature is controlled at 1250-1300°C, kept warm for 8 hours, and after cooling, cut into short fibers with a length of 5-15 mm to obtain silicon carbide mullite fiber.

[0044] Preparation Example 2

[0045] The silicon carbide mullite fiber of this preparation example is prepared by the following steps:

[0046] Sa, mixing aluminum isopropoxide and tetraethyl orthosilicate in a molar ratio of 7:4.4, and hydrolyzing to obtain a mixed sol;

[0047] Sb, adding polyvinyl alcohol accounting for 12% of the total mass of the mixed sol to the mixed sol prepared in step Sa, and mixing thoroughly to prepare a colloidal liquid;

[0048] Sc. The colloidal liquid obtained in step Sb is dipped on the surface of the silicon carbide long fiber, placed in a sintering furnace, and heated to above 600°C at a heating rate of 15°C / min, and then the temperature is controlled at 600-650°C, kept warm for 30 minutes, and heated to shape; after heating and shaping, the temperature is increased to above 1250°C at a heating rate of 15°C / min, and then the temperature is controlled at 1250-1300°C, kept warm for 8 hours, and after cooling, cut into short fibers with a length of 5-15 mm to obtain silicon carbide mullite fiber.

[0049] Preparation Example 3

[0050] The silicon carbide mullite fiber of this preparation example is prepared by the following steps:

[0051] Sa, mixing aluminum isopropoxide and tetraethyl orthosilicate in a molar ratio of 7:5, and hydrolyzing to obtain a mixed sol;

[0052] Sb, adding polyvinyl alcohol accounting for 20% of the total mass of the mixed sol to the mixed sol prepared in step Sa, and mixing thoroughly to prepare a colloidal liquid;

[0053] Sc. The colloidal liquid obtained in step Sb is dipped on the surface of the silicon carbide long fiber, placed in a sintering furnace, and heated to above 600°C at a heating rate of 15°C / min, and then the temperature is controlled at 600-650°C, kept warm for 30 minutes, and heated to shape; after heating and shaping, the temperature is increased to above 1250°C at a heating rate of 15°C / min, and then the temperature is controlled at 1250-1300°C, kept warm for 8 hours, and after cooling, cut into short fibers with a length of 5-15 mm to obtain silicon carbide mullite fiber.

[0054] Example 1

[0055] The preparation method of the high temperature resistant and wear resistant blanket of this embodiment comprises the following steps:

[0056] S1. High-purity aluminum silicate fibers (length 4-18 mm) and silicon carbide mullite fibers of Preparation Example 1 are fully mixed in a mass ratio of 5:1, and a cotton blank is prepared through a cotton collection process;

[0057] S2, placing the cotton blank obtained in step S1 in a sintering furnace, heating it to above 650°C at a heating rate of 15°C / min, then controlling the temperature between 650°C and 700°C, keeping it warm for 30 minutes, lightly sintering it to shape it, and cutting it into the required size after cooling to obtain a shaped cotton blank;

[0058] S3, mixing nano-silicon carbide and ethylene glycol in a mass ratio of 92:8 to prepare silicon carbide slurry, coating the surface of the shaped cotton blank prepared in step S2 with the silicon carbide slurry, ensuring that the slurry penetrates to a thickness of 5 mm, to prepare a slurry-coated cotton blank;

[0059] S4, placing the sizing cotton blank obtained in step S3 in a sintering furnace, heating it to above 650°C at a heating rate of 15°C / min, then controlling the temperature between 650°C and 700°C, holding it for 30 minutes, lightly sintering it to set the shape, and then needle punching it into a blanket to obtain a fiber blanket blank;

[0060] S5. The fiber blanket prepared in step S4 is heated to above 1300° C. at a heating rate of 15° C. / min, and then the temperature is controlled between 1300° C. and 1340° C. for 8 hours to prepare a high-temperature resistant and wear-resistant blanket.

[0061] Example 2

[0062] The difference between this embodiment and embodiment 1 is that in step S1, the silicon carbide mullite fiber of preparation example 2 is used.

[0063] Example 3

[0064] The difference between this embodiment and embodiment 1 is that in step S1, the silicon carbide mullite fiber of preparation example 3 is used.

[0065] Example 4

[0066] The difference between this embodiment and embodiment 2 is that in step S1, the mass ratio of high-purity aluminum silicate fiber to silicon carbide mullite fiber is 4:1.

[0067] Example 5

[0068] The difference between this embodiment and embodiment 2 is that the mass ratio of high-purity aluminum silicate fiber to silicon carbide mullite fiber is 3:1.

[0069] Example 6

[0070] The difference between this embodiment and embodiment 5 is that in step S3, the proportions of the components of the silicon carbide slurry include: 72 parts of nano-silicon carbide, 12 parts of nano-alumina, 10 parts of nano-silicon dioxide, 2 parts of nano-yttrium oxide, and 15 parts of ethylene glycol.

[0071] Example 7

[0072] The difference between this embodiment and embodiment 5 is that in step S3, the proportion of each component of the silicon carbide slurry includes: 80 parts of nano-silicon carbide, 8 parts of nano-alumina, 6 parts of nano-silicon dioxide, 4 parts of nano-yttrium oxide, and 20 parts of ethylene glycol.

[0073] Example 8

[0074] The difference between this embodiment and embodiment 5 is that in step S3, the proportions of the components of the silicon carbide slurry include: 76 parts of nano-silicon carbide, 10 parts of nano-alumina, 8 parts of nano-silicon dioxide, 3 parts of nano-yttrium oxide, and 16 parts of ethylene glycol.

[0075] Example 9

[0076] The difference between this embodiment and embodiment 8 is that in step S5, the temperature is increased to above 1300° C. at a heating rate of 12° C. / min.

[0077] Example 10

[0078] The difference between this embodiment and embodiment 8 is that in step S5, the temperature is increased to above 1300° C. at a heating rate of 18° C. / min.

[0079] Comparative Example 1

[0080] The refractory fiber blanket of this comparative example was prepared by the following steps:

[0081] S1. High-purity aluminum silicate fiber (length 4-18 mm) and polycrystalline mullite refractory fiber (length 4-18 mm) are fully mixed at a mass ratio of 3:1, and a cotton blank is prepared through a cotton collection process;

[0082] S2, placing the cotton blank obtained in step S1 in a sintering furnace, heating it to above 650°C at a heating rate of 15°C / min, then controlling the temperature between 650°C and 700°C, keeping it at that temperature for 30 minutes, and lightly sintering it to obtain a shaped cotton blank;

[0083] S3. Place the needle-punched cotton blanket obtained in step S2 in a sintering furnace, heat it to above 1200° C. at a heating rate of 15° C. / min, and then control the temperature between 1200° C. and 1250° C. for 8 hours to obtain a refractory fiber blanket.

[0084] The polycrystalline mullite refractory fiber used in this comparative example was purchased from Deqing Hongye Crystal Fiber Co., Ltd.

[0085] Comparative Example 2

[0086] The difference between this comparative example and Example 8 is that in step S3, nano yttrium oxide is not added.

[0087] Comparative Example 3

[0088] The difference between this comparative example and Example 8 is that in step S1, silicon carbide fibers of equal weight and length are used instead of silicon carbide mullite fibers.

[0089] Comparative Example 4

[0090] The difference between this comparative example and Example 8 is that the steps of coating the silicon carbide slurry and light calcining and shaping in steps S3 and S4 are removed.

[0091] Comparative Example 5

[0092] The difference between this comparative example and Example 8 is that in step S1, high-purity aluminum silicate fibers of equal weight and length are used instead of silicon carbide mullite fibers.

[0093] Efficacy testing

[0094] The refractory blankets prepared in Examples 1 to 10 and Comparative Examples 1 to 5 of the present application were subjected to performance tests to test their high temperature resistance, tensile strength, and wear resistance at room temperature and high temperature.

[0095] Detection method:

[0096] High-temperature resistance and tensile strength are tested using the methods outlined in GB / T 17911-2018, "Test Methods for Refractory Fiber Products." During testing, the refractory blanket is cut into the required test specimen size according to the standard method, and then tested. For high-temperature resistance, thermal conductivity is tested.

[0097] The room temperature wear resistance was tested using the method described in GB / T 18301-2012. A wear tester was used with 1000 μm sand particles. The test procedure was repeated 500 times, and the mass loss rate of the sample before and after the test was calculated.

[0098] High temperature wear resistance performance was tested using an ABR-1450A high temperature wear resistance tester with the test temperature set at 1000°C. The same method as the above-mentioned normal temperature wear resistance test method was used to conduct a high temperature wear resistance test, and the mass loss rate of the sample before and after the test was calculated.

[0099] The test results are shown in Table 1 below.

[0100] Table 1 Test results of Examples 1 to 10 and Comparative Examples 1 to 5

[0101] Thermal conductivity (W / (m﹒k)) Tensile strength (kPa) Loss rate at room temperature (%) High temperature loss rate (%) Example 1 0.092 67 3.6 7.9 Example 2 0.091 67 3.5 7.6 Example 3 0.092 67 3.6 7.8 Example 4 0.089 69 3.2 7.1 Example 5 0.084 72 3.0 6.8 Example 6 0.082 77 1.2 2.3 Example 7 0.082 78 1.4 2.8 Example 8 0.081 78 0.9 1.6 Example 9 0.081 78 0.9 1.5 Example 10 0.081 78 1.0 1.8 Comparative Example 1 0.109 69 11.4 25.6 Comparative Example 2 0.082 74 1.0 1.9 Comparative Example 3 0.085 68 6.4 11.2 Comparative Example 4 0.083 71 8.6 15.1 Comparative Example 5 0.102 70 2.9 6.1

[0102] The data in Table 1 show that the high-temperature, wear-resistant blankets produced by the preparation methods of Examples 1 to 10 of the present application have significantly improved high-temperature insulation performance compared to the refractory blankets produced by the preparation methods of Comparative Examples 1 to 5, resulting in relatively excellent performance. Furthermore, the high-temperature, wear-resistant blankets produced by the preparation methods of Examples 1 to 10 of the present application exhibit significantly improved wear resistance at both room and high temperatures compared to the refractory blankets produced by the preparation methods of Comparative Examples 1 to 5. This demonstrates that the high-temperature, wear-resistant blankets of the present application possess extremely excellent high-temperature and wear resistance.

[0103] Comparing the data in Table 1 for Example 8 with Comparative Examples 1-5 shows that the present invention's approach, which utilizes specific silicon carbide mullite fibers, a specific ratio of high-purity aluminum silicate fibers to silicon carbide mullite fibers, and a specific silicon carbide slurry coating, is crucial for ensuring the performance of the present invention. The specific silicon carbide mullite fibers effectively ensure the present invention's high-temperature and wear-resistant blanket possesses excellent high-temperature and wear resistance. The specific ratio of high-purity aluminum silicate fibers to silicon carbide mullite fibers ensures a relatively strong bond between the coated and sintered silicon carbide hardened layer and the blanket, effectively improving wear resistance and reducing shedding of the hardened layer during wear. The specific silicon carbide slurry further significantly enhances the bond between the hardened layer and the blanket, further enhancing wear resistance.

[0104] Comparison of Example 8 of the present application with Comparative Example 2 shows that adding a trace amount of yttrium oxide can effectively improve wear resistance. Comparison of Example 8 of the present application with Comparative Example 3 shows that the specific silicon carbide mullite fiber of the present application has better wear resistance than pure silicon carbide fiber after the hardened layer is attached. The applicant speculates that when using pure silicon carbide fiber, when the hardened layer is sintered, because both the fiber and the coating are silicon carbide, silicon carbide whiskers are easily formed in the coating. During impact wear, the whiskers are easily shattered, resulting in increased wear loss.

[0105] Comparing the data in Table 1 with those of Examples 1 to 10 of this application reveals that the specific silicon carbide mullite fiber and silicon carbide slurry with a specific ratio achieve the best wear resistance. The specific ratio of silicon carbide slurry not only ensures excellent bonding between the hardened layer and the silicon carbide mullite fiber, but also effectively enhances the bond strength between the hardened layer and the high-purity aluminum silicate fiber, thereby effectively preventing the hardened layer from shedding.

[0106] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for preparing a high temperature resistant and wear resistant blanket, characterized in that: The following steps are involved: S1. High-purity aluminum silicate fiber and silicon carbide mullite fiber are made into cotton blanks through a cotton collection process; S2, lightly burning the cotton blank obtained in step S1 to set the shape, and then cutting it to obtain a shaped cotton blank; S3, preparing silicon carbide slurry, coating the surface of the shaped cotton blank prepared in step S2 with the silicon carbide slurry, ensuring that the slurry has a penetration thickness of more than 5 mm, to obtain a slurry-coated cotton blank; S4, lightly calcining the sizing cotton blank obtained in step S3 to set the shape, and then needle punching the blanket to obtain a fiber blanket blank; S5. The fiber blanket blank obtained in step S4 is subjected to high-temperature sintering treatment to obtain a high-temperature resistant and wear-resistant blanket.

2. The method for preparing a high temperature resistant and wear resistant blanket according to claim 1, characterized in that: In step S1, the mass ratio of high-purity aluminum silicate fiber to silicon carbide mullite fiber is 3 to 4:

1.

3. The method for preparing a high temperature resistant and wear resistant blanket according to claim 1, characterized in that: In step S1, silicon carbide mullite fiber is prepared by the following steps: Sa, mixing aluminum isopropoxide and tetraethyl orthosilicate in a molar ratio of 7:4-5, and hydrolyzing to obtain a mixed sol; Sb, adding polyvinyl alcohol accounting for 10-20% of the total mass of the mixed sol to the mixed sol prepared in step Sa, and mixing thoroughly to prepare a colloidal liquid; Sc. The colloidal liquid obtained in step Sb is dipped on the surface of the silicon carbide long fiber, heated at 600-650°C for shaping, and then sintered at 1250-1300°C. After cooling, the fiber is cut into short fibers with a length of 5-15 mm to obtain silicon carbide mullite fiber.

4. The method for preparing a high temperature resistant and wear resistant blanket according to claim 1, characterized in that: In step S1, the high-purity aluminum silicate fibers are short fibers with a length of 4 to 18 mm.

5. The method for preparing a high temperature resistant and wear resistant blanket according to claim 4, characterized in that: In the step S2, the temperature of the light calcination is 650-700° C. and the time is more than 30 minutes.

6. The method for preparing a high temperature resistant and wear resistant blanket according to claim 4, characterized in that: In step S3, the proportions of the components of the silicon carbide slurry include: 72-80 parts of nano-silicon carbide, 8-12 parts of nano-aluminum oxide, 6-10 parts of nano-silicon dioxide, 2-4 parts of nano-yttrium oxide, and 15-20 parts of ethylene glycol.

7. The method for preparing a high temperature resistant and wear resistant blanket according to claim 1, characterized in that: In step S4, the temperature of the light calcination is 650-700° C. and the time is more than 30 minutes.

8. The method for preparing a high temperature resistant and wear resistant blanket according to claim 1, characterized in that: In step S5, the high-temperature sintering temperature is 1300-1340° C. and the time is more than 8 hours.

9. The method for preparing a high temperature resistant and wear resistant blanket according to claim 8, characterized in that: In step S5, the heating rate of high temperature sintering is 12-18°C / min.

10. A high temperature resistant and wear resistant blanket, characterized in that: The high-temperature resistant and wear-resistant blanket is prepared by the preparation method of any one of claims 1 to 9.