Process for the production of an aluminosilicate refractory
By preparing aluminosilicate refractory materials from harmless aluminum ash and fly ash, the problem of impurities affecting the resource utilization of aluminum ash and fly ash has been solved, achieving high-temperature performance improvement and large-capacity high-value utilization, breaking through the traditional single solid waste treatment model.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGXI HUAGAN ENVIRONMENTAL TECH R & D CO LTD
- Filing Date
- 2026-03-11
- Publication Date
- 2026-05-29
AI Technical Summary
The utilization of aluminum ash and fly ash resources suffers from impurities that affect sintering performance and high-temperature mechanical properties, making it difficult to directly adapt to the preparation requirements of high-alumina refractory materials and ceramic products. At the same time, the utilization of fly ash is limited by weak demand in the building materials market, and long-term accumulation occupies land and harms the environment.
Using harmlessly treated aluminum ash as the aluminum source and fly ash as the silicon source, aluminum-silicon refractory materials are prepared through processes such as ball milling, magnetic separation, and calcination. Impurity elements are utilized to generate ceramic flux and high-temperature binder phase at high temperatures, thereby optimizing the morphology of impurities and improving the material performance.
This research has improved the high-temperature performance of aluminosilicate refractory materials, reduced porosity, and increased refractoriness to 1600-1760℃, providing a new industrialization paradigm that combines technical and economic advantages for the high-value utilization of bulk industrial solid waste.
Smart Images
Figure CN122102716A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of solid waste utilization, and in particular to a method for preparing an aluminosilicate refractory material. Background Technology
[0002] Currently, solid waste resource utilization has become an essential path to overcome resource and environmental constraints and ensure the security of strategic mineral resources. However, the aluminum ash slag (HW48 hazardous waste) generated by the aluminum smelting industry still faces the predicament of insufficient resource utilization after harmless treatment. Although the mainstream wet / pyrometallurgical treatment processes can effectively remove harmful components such as nitrogen and fluorine, thus eliminating the hazardous waste properties, the resulting high-alumina materials (Al2O3 content >70%) generally contain low-melting-point alkali metals such as K and Na, as well as impurities such as Fe, Ti, Mg, and Ca, which seriously degrade sintering performance and high-temperature mechanical properties, making it difficult for this material to be directly adapted to the preparation requirements of high-alumina refractory materials, ceramics, and other high-end alumina products. At the same time, the dependence on imported bauxite has long exceeded 50%, and the supply of high-quality high-alumina resources faces a severe bottleneck risk. The high-value utilization of aluminum ash after harmless treatment has become a strategic issue to ensure the security of the aluminum resource supply chain. On the other hand, fly ash emitted from coal-fired power plants, as the largest single type of solid waste in my country, has a traditional chemical endowment of "high silicon and low aluminum" (SiO2+Al2O3+Fe2O3>70%, but Al2O3 is usually only 25-35%), as well as impurities such as residual carbon, sulfur, and alkali. This limits its resource utilization to medium-to-large capacity, low-to-medium technology applications, such as landfill projects and building materials. However, due to weak demand in the building materials market and oversupply in the cement market, fly ash utilization is hindered. Currently, it is impossible to absorb newly added fly ash. Long-term accumulation not only occupies a large amount of land but also directly harms the ecological environment. There is an urgent need to carry out new research on medium-to-large capacity value utilization and develop new fly ash-based material preparation technologies. Faced with the rigid requirements of the "Industrial Green Development Plan" to "promote the large-scale and high-value utilization of industrial solid wastes such as smelting slag and fly ash," and the mandatory regulations of the "Solid Waste Pollution Prevention and Control Law" on the principles of "reduction, resource utilization, and harmlessness" for hazardous waste, the end-of-pipe treatment model for single solid waste is no longer sustainable. The chemical complementarity between high-alumina, low-silica aluminum ash and high-silica, low-alumina fly ash provides a theoretical basis for constructing a multi-source solid waste coupled resource utilization technology route. Therefore, it is urgent to break through key technological bottlenecks such as the synergistic activation and targeted impurity removal of fly ash and aluminum ash, and to develop a multi-source solid waste synergistic resource utilization approach with independent intellectual property rights. Summary of the Invention
[0003] This invention provides a method for preparing aluminosilicate refractory materials, which innovatively uses harmlessly disposed aluminum ash as the aluminum source and fly ash as the silicon source to achieve synergistic effects of the two wastes.
[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides a method for preparing an aluminosilicate refractory material, comprising the following steps: Fly ash, harmlessly treated aluminum ash, and water are mixed to obtain a slurry. The slurry was mixed with a sulfuric acid solution to obtain an acidic mixed dispersion. The acidic mixed dispersion was sequentially ball-milled and magnetically separated to obtain a purified mixture; The purified mixture was left to stand and age, then washed with water until neutral, vacuum filtered, and dried to obtain aluminum-silicon powder. The aluminum-silicon powder is placed in a mold and pressed to form a raw material blank; The raw material blanks are calcined to obtain aluminosilicate refractory materials; The aluminum ash after the harmless treatment has an Al2O3 content >70wt%, an AlN content <0.5wt%, and a fluoride leaching amount <100mg / L.
[0005] In some specific embodiments, the mass ratio of the fly ash to the harmlessly treated aluminum ash is (50~80):(20~50).
[0006] In some specific embodiments, the pH value of the acidic mixed dispersion is 3 to 4.
[0007] In some specific embodiments, the ball milling conditions are as follows: the grinding media is alumina balls, the rotation speed is 150~200 r / min, and the time is 0.5~2 h.
[0008] In some specific embodiments, the iron content in the purified mixture is ≤3wt%.
[0009] In some specific embodiments, the temperature for static aging is 10~30℃, and the time for static aging is 48~72h.
[0010] In some specific embodiments, the pressing conditions are: pressure of 50~200MPa and holding time of 10~20min.
[0011] In some specific embodiments, the calcination conditions are as follows: heating rate of 5~10℃ / min, final heating temperature of 1300~1500℃, holding time of 3~6h, cooling rate of 5~10℃ / min, and final cooling temperature of 400~500℃.
[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention creatively proposes an integrated resource utilization technology route of "dual waste synergy - impurity functionalization": It innovatively uses harmlessly treated aluminum ash as the aluminum source and fly ash as the silicon source. Through a specific impurity separation-conversion coupling technology, it achieves the targeted removal of harmful components such as residual carbon while innovatively retaining and regulating characteristic impurity elements such as Ca, Fe, K, and Na. Through high-temperature phase reconstruction and interface reaction engineering optimization, the above impurities react in situ within the range of 1300-1500℃ to generate low-melting-point eutectic compounds of anorthite, iron-aluminum spinel, and potassium-sodium feldspar, transforming them into ceramic fluxes and high-temperature binder phases. Through synergistic optimization of the calcination regime and the impurity occurrence morphology, it ultimately prepares aluminosilicate refractory materials with a refractoriness of 1600-1760℃ and a porosity of less than 10%, achieving synergistic empowerment of fly ash and aluminum ash resources. This provides a new industrial paradigm with both technical and economic advantages for the large-capacity, high-value utilization of bulk industrial solid waste. Attached Figure Description
[0013] The above and other objects, features, and advantages of the invention will be apparent from the following description of preferred embodiments illustrating the gist of the invention and its use, and the accompanying drawings, in which: Figure 1 The image shown is a macroscopic view of the aluminosilicate refractory material in Example 1.
[0014] Figure 2 The image shown is a macroscopic view of the glassy ceramic sample in Comparative Example 1. Detailed Implementation
[0015] The present invention will be described below through specific embodiments. Those skilled in the art will understand that the specific embodiments described below are for illustrative purposes only and do not limit the scope of the invention in any way. Furthermore, in the following embodiments, unless otherwise specified, the reagents and equipment used are commercially available. If specific processing conditions and methods are not explicitly described in the following embodiments, conditions and methods known in the art can be used for processing.
[0016] This invention provides a method for preparing an aluminosilicate refractory material, comprising the following steps: Fly ash, harmlessly treated aluminum ash, and water are mixed to obtain a slurry. The slurry was mixed with a sulfuric acid solution to obtain an acidic mixed dispersion. The acidic mixed dispersion was sequentially ball-milled and magnetically separated to obtain a purified mixture; The purified mixture was left to stand and age, then washed with water until neutral, vacuum filtered, and dried to obtain aluminum-silicon powder. The aluminum-silicon powder is placed in a mold and pressed to form a raw material blank; The raw material blanks are calcined to obtain aluminosilicate refractory materials; The aluminum ash after the harmless treatment has an Al2O3 content >70wt%, an AlN content <0.5wt%, and a fluoride leaching amount <100mg / L.
[0017] In the preparation method of the aluminosilicate refractory material of the present invention, fly ash and harmlessly treated aluminum ash are subjected to acid washing, ball milling and magnetic separation to reduce the free iron content and improve the reactivity of the powder; the treated powder is pressed into shape and calcined at high temperature to obtain the aluminosilicate refractory material with specific service temperature requirements.
[0018] In this invention, the specific process for obtaining harmlessly treated aluminum ash is not specifically limited. Conventional methods in the art, such as pyrocalcination or water leaching, can be used to ensure that the content of Al2O3 in the harmlessly treated aluminum ash is >70wt%, the content of AlN is <0.5wt%, and the leaching amount of fluoride is <100mg / L.
[0019] In some embodiments, the mass ratio of fly ash to the harmlessly treated aluminum ash is (50~80):(20~50). As an example, the mass ratio of fly ash to harmlessly treated aluminum ash can be 50:50, 65:35, 70:30, 75:25, 80:20, etc.
[0020] In this invention, by controlling the mass ratio of fly ash and harmlessly treated aluminum ash within the aforementioned range, it helps to form low-melting-point phases such as calcium, iron, potassium, and sodium to fill the gaps in the ceramic phase, acting as a binder to improve the density of the refractory material. Simultaneously, it retains mullite in the fly ash, promoting mullite formation in the refractory material and further improving its refractory performance. If the mass content of fly ash is too high, it will lead to an increase in low-melting-point substances, increased porosity, and decreased refractoriness. Conversely, if the mass content of harmlessly treated aluminum ash is too high, the material composition will not conform to the requirements of aluminosilicate refractory materials.
[0021] In some embodiments, the pH value of the acidic mixed dispersion is 3 to 4. As an example, the pH value of the acidic mixed dispersion can be 3, 3.2, 3.5, 3.8, and 4, etc.
[0022] In this invention, the concentration of the sulfuric acid solution is not specifically limited; the pH of the slurry can be adjusted to 3-4. In some embodiments, the concentration of the sulfuric acid solution can be 10. wt. %~20 wt. %.
[0023] In some embodiments, the ball milling conditions are as follows: the grinding media is alumina balls, the rotation speed is 150~200 r / min, and the time is 0.5~2 h. As an example, the rotation speed can be 150 r / min, 160 r / min, 170 r / min, 180 r / min, 190 r / min, and 200 r / min, etc., and the time can be 0.5 h, 1 h, 1.5 h, and 2 h, etc.
[0024] In some embodiments, the ball-to-material ratio in the ball mill is 1.2 to 2:1.
[0025] In some embodiments, the iron content in the purified mixture is ≤3wt%.
[0026] In some embodiments, the temperature for static aging is 10~30°C, and the time for static aging is 48~72h. As examples, the temperature for static aging can be 10, 15, 20, 25, and 30°C, and the time for static aging can be 48h, 50h, 56h, 60h, 65h, 70h, and 72h, etc.
[0027] In this invention, the drying temperature and time are not specifically limited; the goal is simply to remove moisture. In some embodiments, drying can be performed at 120°C for 8-10 hours.
[0028] In some embodiments, the pressing conditions are: a pressure of 50~200MPa and a holding time of 10~20min. For example, the pressure can be 50MPa, 60MPa, 100MPa, 120MPa, 150MPa, 180MPa, and 200MPa, etc., and the holding time can be 10min, 12min, 15min, 18min, and 20min, etc.
[0029] In some embodiments, the calcination conditions are as follows: heating rate of 5-10°C / min, final temperature of 1300-1500°C, holding time of 3-6 hours, cooling rate of 5-10°C / min, and final temperature of 400-500°C. As an example, the heating rate can be 5°C / min, 6°C / min, 7°C / min, 8°C / min, 9°C / min, and 10°C / min, etc. The final temperature can be 1300°C, 1350°C, 1400°C, 1450°C, and 1500°C, etc.; the holding time can be 3 hours, 4 hours, 5 hours, and 6 hours, etc.; the cooling rate can be 5°C / min, 6°C / min, 7°C / min, 8°C / min, 9°C / min, and 10°C / min, etc.; and the final temperature can be 400°C, 420°C, 450°C, 480°C, and 500°C, etc.
[0030] In this invention, during the calcination and heating process, the aluminosilicate powder undergoes mineral phase reconstruction, mainly in three stages: From room temperature to 130°C, the surface and interlayer adsorbed water, ash introduced by ball milling, and a small amount of pore condensate evaporate; from 130°C to 670°C, a broad and gradual endothermic peak appears, with relatively slow weight loss. This stage is mainly attributed to the decomposition of heat-resistant components (such as sulfate) and the transformation of the crystal structure; from 670°C to 1500°C, the main weight loss region, multiple endothermic events occur during DSC, and the quartz phase and alumina form the mullite phase, accompanied by the appearance of local feldspar, molten iron, and other liquid phases filling the mineral phase gaps. A lower heating rate, longer holding time, higher holding temperature, and a lower cooling rate can promote a more complete reaction, reduce internal thermal stress, make the structure more compact, and improve the performance of the aluminosilicate refractory material.
[0031] In some embodiments, calcination can be carried out in an electric furnace.
[0032] In some embodiments, after calcination is completed, the power supply to the electric furnace is turned off, and then the furnace is cooled to below 200°C.
[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. The embodiments of this application are only examples, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0034] Example 1 The main components of fly ash and harmlessly treated aluminum ash in Example 1 are shown in Table 1.
[0035] Table 1. Main components of fly ash and harmlessly treated aluminum ash in Example 1 wt.%
[0036] Fly ash, harmlessly treated aluminum ash (AlN content < 0.5 wt%, fluoride leaching < 100 mg / L), and water were mixed at a mass ratio of 4:1:5 to form a slurry. The pH of the slurry was adjusted to 3 with 10 wt% sulfuric acid to obtain an acidic mixed dispersion. Then, alumina balls were used as the medium in a ball mill (ball-to-material ratio of 1.5:1) at a speed of 150 r / min for 60 min. Magnetic separation was then performed to obtain a purified mixture with an iron content ≤ 3 wt%. The mixture was then allowed to stand and age at 25℃ for 48 h. Afterwards, the mixture was washed three times with water until the pH reached 7, and then vacuum filtered to obtain a mixed wet material with a moisture content of 25 wt%. This wet material was dried at 120℃ for 8 hours to obtain aluminosilicate powder. The aluminosilicate powder was then pressed at 90 MPa for 15 minutes to obtain a raw material billet. This billet was placed in a sagger and heated in an electric furnace at a heating rate of 10℃ / min to 1400℃, held at that temperature for 4 hours, and then cooled to 500℃ at a rate of 5℃ / min. The power was then turned off, and the billet was allowed to cool in the furnace to below 200℃ before being removed to obtain an aluminosilicate refractory material. Figure 1 As shown.
[0037] The main components of the aluminosilicate refractory material in Example 1 are shown in Table 2, wherein the contents of Fe2O3 and Al2O3 reach 3.02% and 41.62% respectively, and the bulk density is 2.45 g / cm³. 3 It has a strength > 16.5 MPa, a refractoriness of 1650℃, a water absorption rate of 1.2%, and an apparent porosity of 2.5%, meeting the standard for aluminosilicate refractories (YB / T 5115-2014).
[0038] Table 2 Main components of the aluminosilicate refractory material in Example 1
[0039] Example 2 The main components of fly ash and harmlessly treated aluminum ash in Example 2 are shown in Table 3.
[0040] Table 3 Main components of fly ash and harmlessly treated aluminum ash in Example 2
[0041] Fly ash, harmlessly treated aluminum ash (AlN content <0.5wt%, fluoride leaching <100mg / L), and water were mixed at a mass ratio of 7:3:10 to form a slurry. The pH of the slurry was adjusted to 3 with 10wt% sulfuric acid to obtain an acidic mixed dispersion. Then, alumina balls (ball-to-material ratio 1.5:1) were used as the medium in a ball mill at 150r / min for 90min. Magnetic separation was then performed to obtain a purified mixture with an iron content ≤3wt%. After standing and aging at 25℃ for 48h, the mixture was washed three times with water until the pH reached 7, vacuum filtered, and the resulting wet mixture with a moisture content of 29wt% was dried at 120℃ for 8 hours. The purified aluminum-silicon powder was obtained; the aluminum-silicon powder was pressed at 50 MPa for 15 min to obtain a raw material blank; it was placed in a sagger and heated in an electric furnace at a heating rate of 10℃ / min to 1400℃, held for 4 h, and then cooled to 500℃ at a rate of 5℃ / min after the holding period. The power was then turned off, and the blank was taken out after cooling to below 200℃ in the furnace to obtain an aluminum-silicon refractory material.
[0042] The main components of the aluminosilicate refractory material in Example 2 are shown in Table 4, with Fe2O3 and Al2O3 contents reaching 2.77% and 45.83% respectively, and a bulk density of 2.51 g / cm³. 3 It has a strength > 19.8 MPa, a refractoriness of 1700℃, a water absorption rate of 0.3%, and an apparent porosity of 0.6%, meeting the standards for aluminosilicate refractory materials.
[0043] Table 4 Main components of the aluminosilicate refractory material in Example 2
[0044] Example 3 The main components of fly ash and harmlessly treated aluminum ash in Example 3 are shown in Table 5.
[0045] Table 5. Main components of fly ash and harmlessly treated aluminum ash in Example 3
[0046] Fly ash, harmlessly treated aluminum ash (AlN content < 0.5 wt%, fluoride leaching < 100 mg / L), and water were mixed at a mass ratio of 4:1:5 to form a slurry. The pH of the slurry was adjusted to 3.5 with 10 wt% sulfuric acid to obtain an acidic mixed dispersion. Then, alumina balls (ball-to-material ratio 1.5:1) were used as the medium in a ball mill and milled at 150 r / min for 90 min. Magnetic separation was then performed to obtain a purified mixture with an iron content ≤ 3 wt%. After standing and aging at 25℃ for 48 h, the mixture was washed three times with water until the pH reached 7, vacuum filtered, and the resulting wet mixture with a moisture content of 31 wt% was dried at 120℃ for 10 h to obtain purified aluminosilicate powder. The aluminosilicate powder was then pressurized at 100 MPa for 15 minutes. The raw material blanks are prepared by heating in a sagger in an electric furnace at a heating rate of 10℃ / min to 1500℃ and holding for 4 hours. After holding, the temperature is reduced to 500℃ at a rate of 5℃ / min. Then the power is turned off and the material is cooled to below 200℃ in the furnace before being taken out to obtain aluminosilicate refractory material.
[0047] The main components of the aluminosilicate refractory material in Example 3 are shown in Table 6, wherein the contents of Fe2O3 and Al2O3 reach 1.88% and 51.64%, respectively, and the bulk density is 2.84 g / cm³. 3 It has a strength > 29.1 MPa, a refractoriness of 1760℃, a water absorption rate of 0.3%, and an apparent porosity of 0.8%, meeting the standards for aluminosilicate refractory materials.
[0048] Table 6 Main components of the aluminosilicate refractory material in Example 3
[0049] Example 4 The main components of fly ash and harmlessly treated aluminum ash in Example 4 are shown in Table 7.
[0050] Table 7 Main components of fly ash and harmlessly treated aluminum ash in Example 4
[0051] Fly ash, harmlessly treated aluminum ash (AlN content <0.5wt%, fluoride leaching <100mg / L), and water were mixed at a mass ratio of 4:1:5 to form a slurry. The pH of the slurry was adjusted to 4 with 10wt% sulfuric acid to obtain an acidic mixed dispersion. Then, the mixture was ball-milled in a ball mill at 150r / min for 30min using alumina balls as the medium (ball-to-material ratio of 1.5:1), followed by magnetic separation to obtain a purified mixture with an iron content ≤3wt%. After standing and aging at 25℃ for 48h, the mixture was washed three times with water until the pH reached 7, vacuum filtered, and the resulting wet mixture with a water content of 27wt% was dried at 120℃ for 8h to obtain purified aluminosilicate powder. The aluminosilicate powder was then pressurized at 50MPa for 15 hours. The raw material blanks are prepared by heating in a sagger in an electric furnace at a heating rate of 10℃ / min to 1350℃ and holding for 4 hours. After holding, the temperature is reduced to 500℃ at a rate of 5℃ / min. Then the power is turned off and the material is cooled to below 200℃ in the furnace before being taken out to obtain aluminosilicate refractory material.
[0052] The main components of the aluminosilicate refractory material in Example 4 are shown in Table 8, with Fe2O3 and Al2O3 contents reaching 2.79% and 41.94% respectively, and a bulk density of 2.17 g / cm³. 3 It has a strength >17.5MPa, a refractoriness of 1680℃, a water absorption rate of 2.4%, and an apparent porosity of 4.0%, meeting the standards for aluminosilicate refractory materials.
[0053] Table 8 Main components of the aluminosilicate refractory material in Example 4
[0054] Comparative Example 1 The main components of fly ash and harmlessly treated aluminum ash in Comparative Example 1 are shown in Table 9.
[0055] Table 9. Main components of fly ash and harmlessly treated aluminum ash in Comparative Example 1
[0056] Fly ash and harmlessly treated aluminum ash (AlN content < 0.5 wt%, fluoride leaching < 100 mg / L) were mixed at a mass ratio of 4:1 and pressed into raw material blanks at a pressure of 50 MPa for 15 min. The blanks were then placed in a crucible and heated in an electric furnace at a heating rate of 10℃ / min to 1350℃, held at that temperature for 4 h, and then cooled to 500℃ at a rate of 5℃ / min. The power was then turned off, and the blanks were allowed to cool to below 200℃ before being removed, yielding the following result: Figure 2 The image shows a glassy ceramic sample with severe foaming.
[0057] The main components of the glassy ceramic sample in Comparative Example 1 are shown in Table 10, with Fe2O3 and Al2O3 contents reaching 6.08% and 42.25%, respectively, and a bulk density of 0.94 g / cm³. 3 It has a refractoriness of 1450℃, a strength of >7.09MPa, a water absorption rate of 0.4%, and a porosity of 58%, making it unsuitable for use in aluminosilicate refractories.
[0058] Table 10 Main components of the glassy ceramic sample in Comparative Example 1
[0059] Although preferred embodiments of the invention have been shown and described, it is conceivable that those skilled in the art can devise various modifications to the invention within the spirit and scope of the appended claims.
Claims
1. A method for preparing an aluminosilicate refractory material, characterized in that, Includes the following steps: Fly ash, harmlessly treated aluminum ash, and water are mixed to obtain a slurry; The slurry was mixed with a sulfuric acid solution to obtain an acidic mixed dispersion. The acidic mixed dispersion was sequentially ball-milled and magnetically separated to obtain a purified mixture; The purified mixture was left to stand and age, then washed with water until neutral, vacuum filtered, and dried to obtain aluminum-silicon powder. The aluminum-silicon powder is placed in a mold and pressed to form a raw material blank; The raw material blanks are calcined to obtain aluminosilicate refractory materials; The aluminum ash after the harmless treatment has an Al2O3 content >70wt%, an AlN content <0.5wt%, and a fluoride leaching amount <100mg / L.
2. The method for preparing the aluminosilicate refractory material according to claim 1, characterized in that, The mass ratio of the fly ash to the harmlessly treated aluminum ash is (50~80):(20~50).
3. The method for preparing the aluminosilicate refractory material according to claim 1, characterized in that, The pH value of the acidic mixed dispersion is 3~4.
4. The method for preparing the aluminosilicate refractory material according to claim 1, characterized in that, The conditions for ball milling are as follows: the grinding medium is alumina balls, the rotation speed is 150~200 r / min, and the time is 0.5~2 h.
5. The method for preparing the aluminosilicate refractory material according to claim 1, characterized in that, The iron content in the purified mixture is ≤3wt%.
6. The method for preparing the aluminosilicate refractory material according to claim 1, characterized in that, The temperature for static aging is 10~30℃, and the time for static aging is 48~72h.
7. The method for preparing the aluminosilicate refractory material according to claim 1, characterized in that, The pressing conditions are: pressure of 50~200MPa and holding time of 10~20min.
8. The method for preparing the aluminosilicate refractory material according to claim 1, characterized in that, The calcination conditions are as follows: heating rate of 5~10℃ / min, final temperature of 1300~1500℃, holding time of 3~6h, cooling rate of 5~10℃ / min, and cooling to 400~500℃.