Molten aluminum erosion resistant castable as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of amorphous refractory new materials, and particularly relates to a molten aluminum erosion resistant castable as well as a preparation method and application thereof. The molten aluminum erosion resistant castable is prepared from the following raw materials in parts by weight: 64-80 parts of fused quartz particles, 4-8 parts of fused quartz micro powder, 4-8 parts of magnesium aluminate spinel micro powder, 5-10 parts of alpha-alumina micro powder, 3-10 parts of calcium aluminate cement, 4-12 parts of a composite molten aluminum wetting resistant agent, 0.1-1 part of a water reducing agent and 4-10 parts of water. Wherein the composite molten aluminum wetting resistant agent is formed by compounding BaAl2O4, BaTiO3 and V2O5. The invention further discloses a preparation method of the composite molten aluminum wetting resistant agent. The molten aluminum erosion resistant castable has the advantages of excellent molten aluminum erosion and permeation resistance, good thermal shock resistance, low heat conductivity coefficient, high temperature resistance and high strength, and the service life of the castable product is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of new materials, and in particular relates to a casting material resistant to aluminum liquid corrosion, and a preparation method and application thereof. Background Art

[0002] Aluminum alloys are widely used in aircraft manufacturing, construction, equipment manufacturing, shipbuilding, automobiles, railways and other fields due to their stable performance, corrosion resistance and good ductility. With the increasing application of industrial sectors, the demand for aluminum alloys has increased rapidly. At the same time, the demand for high-quality aluminum alloys is also increasing, which makes the control of alloy composition and impurities in aluminum smelting more stringent, and the use conditions of refractory materials more stringent, especially in the parts in contact with molten aluminum. It is particularly important to improve the aluminum corrosion behavior of refractory materials. Molten aluminum not only contains highly chemically active elements such as magnesium, silicon and zinc, but also has excellent fluidity. The viscosity of molten aluminum at 750°C is only 0.104Pa·s, which is quite close to the viscosity of water at 20°C (0.1Pa·s). Molten aluminum has good wettability to refractory materials and is easy to penetrate into the refractory materials through pores and penetrate into the furnace lining, thereby causing damage to the refractory materials. Therefore, the refractory materials in contact with molten aluminum are required to have good resistance to aluminum liquid wettability.

[0003] Aluminum alloy smelting production requires electrolytic cells, aluminum flow troughs, transport containers, mixing furnaces and smelting furnaces. The working layer of the electrolytic cell mainly uses bottom cathode carbon blocks and side wall silicon carbide bricks. The aluminum flow trough generally uses Al2O3-SiO2 low-cement castables or fused quartz low-cement castables. Aluminum-silica refractory materials and fused quartz have low thermal conductivity and low thermal expansion coefficients. While improving the volume stability of the aluminum flow trough, they also reduce heat loss, make full use of waste heat, and reduce comprehensive energy consumption. It is conducive to implementing the major national energy conservation and emission reduction strategies, and can greatly improve the thermal shock resistance of products, extend service life, and reduce the cost of use. However, at high temperatures, molten aluminum and alloy elements are easy to wet and react with aluminum-silica refractory materials and fused quartz, resulting in refractory failure, reducing the service life of refractory materials, and also affecting the composition of aluminum alloys. During the study, it is necessary to control the free silica content in the refractory, and add non-wetting agents to improve the wettability of the refractory materials against aluminum liquid.

[0004] Chinese invention patent application CN 106673672 B discloses a composition for preparing an aluminum molten launder and an aluminum molten launder and a method for preparing the same. Specifically, a composition for preparing an aluminum molten launder is provided, wherein one or more of fused quartz particles, fused corundum particles and fused mullite particles are selected, a large amount of fly ash is used as filler, and a large amount of free silica is introduced, resulting in a decrease in the corrosion resistance of the aluminum launder. Chinese patent application number CN 101734928 B discloses a method for preparing a fused quartz refractory castable that is not wetted by aluminum liquid, using fused quartz as the main material; however, the activity of magnesium in aluminum alloy is extremely high. When smelting high-magnesium aluminum alloy, magnesium easily penetrates into the refractory material and reacts with alumina and silica to cause the castable to fail. The anti-wetting agent BaSO4 will decompose and release sulfur dioxide toxic and harmful gases during heat treatment and use at high temperatures, polluting the environment. The Chinese patent application number CN 117383912B discloses a non-stick aluminum castable and its preparation method, which is made of high-aluminum aggregate. However, the high-aluminum aggregate has a high thermal expansion coefficient, and the castable product is prone to thermal shock cracking, resulting in a decrease in the service life of the product. Therefore, it is urgent to study a castable with good aluminum corrosion resistance. Summary of the invention

[0005] In view of the problems and shortcomings in the prior art, the purpose of the present invention is to provide a castable resistant to aluminum liquid corrosion and a preparation method and application thereof.

[0006] To achieve the purpose of the invention, the technical solution adopted by the present invention is as follows:

[0007] The first aspect of the present invention provides an aluminum liquid corrosion resistant casting material, which is made of the following raw materials in parts by weight: 64 to 80 parts of fused quartz particles, 4 to 8 parts of fused quartz micropowder, 4 to 8 parts of magnesia aluminum spinel micropowder, 5 to 10 parts of α-alumina micropowder, 3 to 10 parts of calcium aluminate cement, 4 to 12 parts of composite aluminum liquid resistant wetting agent, 0.1 to 1 part of water reducer, and 4 to 10 parts of water; wherein the composite aluminum liquid resistant wetting agent is composited by BaAl2O4 (barium aluminate), BaTiO3 (barium titanate) and V2O5 (vanadium pentoxide).

[0008] According to the above-mentioned resistant to aluminum liquid corrosion castable, preferably, the resistant to aluminum liquid corrosion castable is made of the following raw materials in parts by weight: 74 parts of fused quartz particles, 6 parts of fused quartz micropowder, 4 parts of magnesium aluminum spinel micropowder, 8 parts of α-alumina micropowder, 8 parts of calcium aluminate cement, 8 parts of composite anti-aluminum liquid wetting agent, 0.6 parts of water reducer, and 7 parts of water; wherein the composite anti-aluminum liquid wetting agent is composited by BaAl2O4 (barium aluminate), BaTiO3 (barium titanate) and V2O5 (vanadium pentoxide).

[0009] According to the above-mentioned aluminum liquid corrosion resistant castable, preferably, the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the composite aluminum liquid resistant wetting agent is (2-5): (1-5): (1-5).

[0010] According to the above-mentioned aluminum liquid corrosion resistant castable, preferably, the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the composite aluminum liquid resistant wetting agent is 2:1:1.

[0011] According to the above-mentioned aluminum liquid corrosion resistant castable, preferably, the water reducer is sodium tripolyphosphate and / or sodium hexametaphosphate; more preferably, the water reducer is sodium hexametaphosphate high-efficiency water reducer.

[0012] According to the above-mentioned aluminum liquid corrosion resistant castable, preferably, the cement is calcium aluminate cement; more preferably, the cement is Secar-71 cement.

[0013] According to the above-mentioned aluminum liquid corrosion resistant castable, preferably, the particle size of the fused quartz particles is 0-8 mm; the particle size of the composite aluminum liquid resistant wetting agent is ≤0.075 mm; the particle size of the fused quartz micropowder is 200 mesh; the particle size of the magnesium aluminum spinel micropowder is 325 mesh; the particle size of the α-alumina micropowder is 325 mesh.

[0014] The second aspect of the present invention provides the use of the aluminum liquid corrosion resistant castable described in the first aspect in the preparation of aluminum liquid corrosion resistant castable products.

[0015] According to the above application, preferably, the aluminum liquid corrosion resistant castable product is a smelting equipment or / and aluminum liquid container required for aluminum alloy smelting production, including an aluminum flow trough, a transport container and a filter box.

[0016] A third aspect of the present invention provides a method for preparing a castable product resistant to aluminum liquid corrosion, comprising the following steps:

[0017] (1) Weighing each raw material according to the raw material composition of the aluminum liquid corrosion resistant castable described in the first aspect above, and then uniformly mixing fused quartz particles, fused quartz powder, magnesium aluminum spinel powder, α-alumina powder, calcium aluminate cement, composite aluminum liquid resistant wetting agent and water reducer to obtain a mixture;

[0018] (2) adding water to the mixture prepared in step (1), stirring and mixing evenly to obtain a wet mix castable;

[0019] (3) The wet-mixed castable prepared in step (2) is subjected to casting molding, curing and demoulding, drying and calcining treatment to obtain a castable product resistant to aluminum liquid corrosion.

[0020] According to the above preparation method, preferably, in step (3), the calcination temperature is 800-1200° C., and the calcination time is 2-4 hours.

[0021] According to the above preparation method, preferably, in step (3), during the calcination treatment, the heating rate is 2 to 8°C / min.

[0022] Compared with the prior art, the present invention has the following positive and beneficial effects:

[0023] (1) The present invention adopts for the first time a compound of BaAl2O4, BaTiO3 and V2O5 as an anti-aluminum liquid wetting agent. The BaAl2O4 in the anti-aluminum liquid wetting agent can capture free SiO2 of the castable, thereby improving the castable's non-wetting and corrosion resistance by aluminum liquid; the addition of BaTiO3 can further promote BaAl2O4 to capture free SiO2, thereby improving the anti-aluminum corrosion effect; the V2O5 (melting point 681°C) in the anti-aluminum liquid wetting agent is easy to form a glass phase at high temperature, which can block pores and reduce porosity. In addition, the vanadium intermetallic alloy (V-Al-Si-Mg) formed by the reduction of V2O5 forms an interface physical barrier to further hinder the penetration of aluminum liquid; therefore, the present invention adopts a compound of BaAl2O4, BaTiO3 and V2O5 as an anti-aluminum liquid wetting agent to effectively improve the aluminum corrosion resistance and penetration performance of the refractory material.

[0024] (2) The forced stirring and dispersing agent used in the production method of traditional castables are not enough to effectively and evenly disperse the anti-aluminum liquid wetting agent in the castable matrix. The BaAl2O4 in the anti-aluminum liquid wetting agent of the present invention has cement hydration characteristics. After hydration, the hydration product can be fully dispersed in the castable, so that a small amount of anti-aluminum liquid wetting agent can be fully homogenized in the castable matrix, so as to achieve the purpose of preventing the entire castable matrix from being wetted by aluminum liquid.

[0025] (3) Magnesium aluminate spinel powder is added to the castable formula of the present invention. Magnesium aluminate spinel powder can reduce the wettability between the aluminum-magnesium alloy liquid and the castable, and improve the castable's resistance to magnesium corrosion. Moreover, compared with directly adding magnesia sand, the thermal shock stability of the prepared aluminum liquid corrosion-resistant castable product (such as an aluminum flow trough) can be improved, and it is more suitable for the production of aluminum-magnesium alloys.

[0026] (4) The castable products (such as aluminum flow troughs, etc.) prepared using the aluminum liquid corrosion resistant castable of the present invention have excellent aluminum liquid corrosion and penetration resistance, especially significant aluminum-magnesium alloy liquid corrosion resistance, good thermal shock resistance, low thermal conductivity, high temperature resistance, and high strength, thereby improving the service life of the castable products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a photograph of a crucible sample prepared by using the castable described in Comparative Example 1-1 after being cut along the axis of the crucible;

[0028] Figure 2 This is a photograph of a crucible sample prepared by using the castable described in Comparative Example 1-2 after being cut along the crucible axis;

[0029] Figure 3 This is a photograph of a crucible sample prepared using the castable described in Example 1-1 after being cut along the axis of the crucible. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0031] The following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. When the terms "comprise" and / or "include" are used in this specification, it indicates that there are features, steps, operations, parts and / or combinations thereof.

[0033] The experimental methods in the following examples without specifying specific conditions all adopt conventional techniques in the art or follow the conditions recommended by the manufacturers; the reagents or instruments used without specifying the manufacturers are all conventional products that can be obtained commercially.

[0034] Example 1: Discussion on types of anti-aluminum liquid wetting agents

[0035] In order to study the influence of the type of anti-aluminum liquid wetting agent on the performance of the prepared anti-aluminum liquid corrosion castable, the present invention carried out Example 1-1 and Comparative Examples 1-1 to Comparative Examples 1-7. The specific contents of Example 1-1 and Comparative Examples 1-1 to Comparative Examples 1-7 are as follows:

[0036] Example 1-1:

[0037] A castable material resistant to aluminum liquid corrosion is prepared from the following raw materials in parts by weight: 74 parts of fused quartz particles with a particle size of 0 to 8 mm, 6 parts of fused quartz micropowder with a particle size of 200 meshes, 4 parts of magnesium aluminum spinel micropowder with a particle size of 325 meshes, 8 parts of α-alumina micropowder with a particle size of 325 meshes, 8 parts of calcium aluminate cement, 0.6 parts of water reducer, 7 parts of water and an aluminum liquid resistant wetting agent with a particle size of ≤0.075 mm; wherein, by weight, the aluminum liquid resistant wetting agent is composited by 4 parts of BaAl2O4, 4 parts of BaTiO3 and 4 parts of V2O5; the water reducer is a sodium hexametaphosphate high-efficiency water reducer; and the cement is Secar-71 cement

[0038] The preparation method of the above-mentioned aluminum liquid corrosion resistant casting material is as follows:

[0039] (1) weighing the raw materials according to the raw material composition of the above-mentioned aluminum liquid corrosion resistant castable, and then uniformly mixing fused quartz particles, fused quartz powder, magnesium aluminum spinel powder, α-alumina powder, calcium aluminate cement, aluminum liquid resistant wetting agent and water reducing agent to obtain a mixture;

[0040] (2) adding water to the mixture prepared in step (1), stirring for 2-3 minutes to make the mixture uniform, and obtaining a wet mix castable;

[0041] (3) The wet-mixed castable prepared in step (2) is added to a sample mold fixed on a vibration table, and vibrated to form the sample. The sample is then cured for 24 hours at a humidity of not less than 90% and a temperature of 25±1°C, and then demolded to obtain a green sample. The green sample is dried at 110°C for 24 hours, and then placed in a high-temperature furnace and heated to 1200°C at a heating rate of 5°C / min and calcined for 3 hours.

[0042] The contents of Comparative Examples 1-1 to Comparative Examples 1-7 are basically the same as those of Example 1-1, except that different anti-aluminum liquid wetting agents are used, the formula compositions of the anti-aluminum liquid corrosion castables described in Example 1-1 and Comparative Examples 1-1 to Comparative Examples 1-7 are shown in Table 1, and the preparation methods of the anti-aluminum liquid corrosion castables described in Comparative Examples 1-1 to Comparative Examples 1-7 are the same as those of Example 1-1.

[0043] Table 1: Casting material sample formula of comparative examples 1-1 to 1-7 and embodiment 1-1

[0044]

[0045] The performance of the castable samples of the aluminum liquid corrosion resistance described in Example 1-1 and Comparative Examples 1-1 to Comparative Examples 1-7 was measured. Among them, the apparent porosity and bulk density of the sample after heat treatment at 1200°C × 3h were measured according to the national standard GB / T2999-2002; the room temperature flexural strength test of the sample after heat treatment at 1200°C × 3h was carried out according to the national standard GB / T3001-2007, and the load was vertically applied to the sample until it broke; the room temperature compressive strength test of the sample after heat treatment at 1200°C × 3h was carried out according to the national standard GB / T5072-2008, and the load was continuously and evenly applied on the compression testing machine until the sample was destroyed. The aluminum corrosion resistance test was carried out according to the slag resistance test method of refractory materials in GB / T8931-2007, and the static crucible method was adopted, that is, the casting wet mix prepared by the present invention was cast into a homemade crucible stainless steel mold (the edge length, bottom diameter and upper diameter of the crucible were 70, 60 and 70 mm, respectively. The depth, bottom diameter and upper diameter of the tapered hole were 35, 35 and 40 mm, respectively, to facilitate the demoulding process of the castable), vibrated for 90 seconds, and then demoulded after curing for 24 hours at a temperature of 25±1°C. The crucible green sample was placed at 110°C for drying for 24 hours, and then placed in a high-temperature furnace and heated to 1200°C for calcination for 3 hours to obtain a crucible sample; the corrosion test process of the crucible sample was as follows: 50g of 5083 aluminum alloy rod was placed in the crucible sample, and then placed in a furnace for heating, kept at 850°C for 72 hours, and cut along the axis of the crucible after natural cooling (wherein, the crucible samples prepared from the aluminum liquid corrosion resistant castables described in Comparative Example 1-1, Comparative Example 1-2 and Example 1-1 are shown in the photos of the crucible samples cut along the axis respectively Figure 1 , Figure 2 and Figure 3 The erosion area is measured and the percentage of erosion area is calculated to judge the quality of the castable's anti-aluminum corrosion performance. The performance test results of the castable samples of the anti-aluminum corrosion described in Example 1-1 and Comparative Examples 1-1 to Comparative Examples 1-7 are shown in Table 2.

[0046] Table 2 Performance test results of castable samples resistant to aluminum liquid corrosion prepared in Example 1-1 and Comparative Examples 1-1 to 1-7

[0047]

[0048] Depend on Figure 1-Figure 3 As shown in Table 2, when no anti-aluminum wetting agent is added to the castable formula, the crucible prepared by the castable is most obviously corroded by the filtrate (e.g. Figure 1As shown in the figure, the percentage of aluminum liquid corrosion area reached 24.8%; when BaAl2O4, BaTiO3 or V2O5 were added alone as anti-aluminum wetting agents in the castable formula, the anti-aluminum corrosion performance of the castable was improved to a certain extent. Among them, when BaAl2O4 was added alone, the anti-aluminum corrosion effect of the castable was significantly improved (as shown in the figure Figure 2 As shown), the percentage of aluminum liquid erosion area decreased from 24.8% to 6.7%; when BaTiO3 was added alone, the percentage of aluminum liquid erosion area of ​​the castable decreased to 12.3%, and when V2O5 was added alone, the percentage of aluminum liquid erosion area decreased to 8.2%. The composite addition of any two anti-aluminum wetting agents of BaAl2O4, BaTiO3 or V2O5 can further improve the anti-aluminum corrosion effect. Among them, when BaAl2O4 and V2O5 were added in combination, the percentage of aluminum liquid erosion area of ​​the castable was reduced to 3.1%; moreover, when BaAl2O4, BaTiO3 and V2O5 were added simultaneously as anti-aluminum wetting agents in the castable formula, the castable prepared had the best anti-aluminum corrosion effect, and there was no corrosion layer on the surface of the crucible prepared with the castable (such as Figure 3 As shown), the percentage of aluminum liquid corrosion area is 0%.

[0049] In addition, the type of anti-aluminum wetting agent added has a certain influence on the macroscopic properties of the castable. BaAl2O4 and V2O5 can improve the room-temperature flexural strength and room-temperature compressive strength of the castable, while adding BaTiO3 alone will cause the temperature flexural strength and room-temperature compressive strength of the castable to decrease. The present invention can overcome the disadvantage that adding BaTiO3 alone causes the mechanical properties of the castable to decrease by using BaAl2O4, BaTiO3 and V2O5 as the anti-aluminum wetting agent. Therefore, the anti-aluminum wetting agent is preferably BaAl2O4, BaTiO3 and V2O5 added in combination.

[0050] Example 2: Discussion on the dosage of BaAl2O4 in the anti-aluminum wetting agent:

[0051] In order to study the effect of the amount of BaAl2O4 in the anti-aluminum liquid wetting agent on the performance of the prepared aluminum liquid corrosion resistant castable, the present invention carried out Examples 2-1 to 2-4.

[0052] The contents of Examples 2-1 to 2-4 are basically the same as those of Example 1-1, except that the amount of BaAl2O4 used in the anti-aluminum liquid wetting agent is different. The formula composition of the anti-aluminum liquid corrosion castables of Examples 2-1 to 2-4 is shown in Table 3, and the preparation method of the anti-aluminum liquid corrosion castables of Examples 2-1 to 2-4 is the same as that of Example 1-1.

[0053] Table 3 Casting material sample formula of Example 2-1 to Example 2-4

[0054]

[0055] The performance of the aluminum liquid corrosion resistant castable samples described in Examples 2-1 to 2-4 was measured. The performance test method was the same as that in Example 1. The performance test results are shown in Table 4.

[0056] Table 4 Performance test results of aluminum liquid corrosion resistant casting material samples prepared in Example 2-1 to Example 2-4

[0057]

[0058] It can be seen from Table 4 that when the addition amounts of BaTiO3 and V2O5 in the composite anti-aluminum liquid wetting agent are both 4 parts and the addition amount of BaAl2O4 is 2-5 parts, the prepared anti-aluminum corrosion castables have good anti-aluminum corrosion performance, and the room-temperature flexural strength and room-temperature compressive strength of the castables are improved, but the apparent porosity, bulk density and heating line change rate of the castables do not change much; therefore, the amount of BaAl2O4 is preferably 2-5 parts, and more preferably 4 parts.

[0059] Example 3: Discussion on the dosage of BaTiO3 in the anti-aluminum wetting agent:

[0060] In order to study the effect of the amount of BaTiO3 in the anti-aluminum liquid wetting agent on the performance of the prepared aluminum liquid corrosion resistant castable, the present invention carried out Example 3-1 to Example 3-4.

[0061] The contents of Examples 3-1 to 3-4 are basically the same as those of Example 1-1, except that the amount of BaTiO3 used in the anti-aluminum liquid wetting agent is different. The formula composition of the anti-aluminum liquid corrosion castables of Examples 3-1 to 3-4 is shown in Table 5, and the preparation method of the anti-aluminum liquid corrosion castables of Examples 3-1 to 3-4 is the same as that of Example 1-1.

[0062] Table 5 Casting material sample formula of Example 3-1 to Example 3-4

[0063]

[0064] The performance of the aluminum liquid corrosion resistant castable samples described in Examples 3-1 to 3-4 was measured. The performance test method was the same as that in Example 1. The performance test results are shown in Table 6.

[0065] Table 6 Performance test results of aluminum liquid corrosion resistant casting material samples prepared in Example 3-1 to Example 3-4

[0066]

[0067] It can be seen from Table 6 that when the addition amount of the composite anti-aluminum liquid wetting agent BaAl2O4 and V2O5 is 4 parts and the addition amount of BaTiO3 is 1-5 parts, the prepared anti-aluminum corrosion castables have good anti-aluminum corrosion performance, the apparent porosity and volume density of the castables do not change much, but the room temperature flexural strength and room temperature compressive strength decrease, and the heating line change rate decreases first and then increases with the increase of BaTiO3 addition, and is the lowest when the addition amount is 2 parts. Therefore, the addition amount of BaTiO3 is preferably 1-3 parts, and more preferably 2 parts.

[0068] Example 4: Discussion on the dosage of V2O5 in the anti-aluminum wetting agent:

[0069] In order to study the effect of the amount of V2O5 in the anti-aluminum liquid wetting agent on the performance of the prepared aluminum liquid corrosion resistant castable, the present invention carried out Examples 4-1 to 4-4.

[0070] The contents of Examples 4-1 to 4-4 are basically the same as those of Example 1-1, except that the amount of V2O5 used in the anti-aluminum liquid wetting agent is different. The formula composition of the anti-aluminum liquid corrosion castables of Examples 4-1 to 4-4 is shown in Table 7, and the preparation method of the anti-aluminum liquid corrosion castables of Examples 4-1 to 4-4 is the same as that of Example 1-1.

[0071] Table 7 Casting material sample formula of Example 4-1 to Example 4-4

[0072]

[0073] The performance of the aluminum liquid corrosion resistant castable samples described in Examples 4-1 to 4-5 was measured. The performance test method was the same as that in Example 1. The performance test results are shown in Table 8.

[0074] Table 8 Performance test results of castable samples resistant to aluminum corrosion prepared in Example 4-1 to Example 4-5

[0075]

[0076] It can be seen from Table 8 that when the addition amount of the composite anti-aluminum liquid wetting agent BaAl2O4 is 4 parts, the addition amount of BaTiO3 is 2 parts, and the addition amount of V2O5 is 1-5 parts, the prepared anti-aluminum corrosion castables have good anti-aluminum corrosion performance, the apparent porosity and bulk density of the castables do not change much, the heating line change rate shows a first decreasing trend with the increase of V2O5 addition, and the flexural and compressive strengths are improved; therefore, the addition amount of V2O5 is preferably 1-5 parts. In order to reduce the use cost and ensure the performance of the castable, it is more preferred that the addition amount of BaAl2O4 is 4, the addition amount of BaTiO3 is 2, and the addition amount of V2O5 is 2 parts.

[0077] Example 4: Study on the influence of calcination temperature during castable preparation

[0078] In order to study the effect of calcination temperature on the performance of the prepared aluminum liquid corrosion resistant castable, the present invention carried out Examples 5-1 to 5-4. The specific contents of Examples 5-1 to 5-4 are as follows:

[0079] Example 5-1:

[0080] A castable material resistant to aluminum liquid corrosion is prepared from the following raw materials in parts by weight: 74 parts of fused quartz particles with a particle size of 0-8 mm, 6 parts of fused quartz micropowder with a particle size of 200 meshes, 4 parts of magnesium aluminum spinel micropowder with a particle size of 325 meshes, 8 parts of α-alumina micropowder with a particle size of 325 meshes, 8 parts of calcium aluminate cement, 0.6 parts of water reducer, 7 parts of water and 8 parts of aluminum liquid resistant wetting agent with a particle size of ≤0.075 mm; wherein the aluminum liquid resistant wetting agent is composited with BaAl2O4, BaTiO3 and V2O5, and the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the aluminum liquid resistant wetting agent is 2:1:1; the water reducer is sodium hexametaphosphate high-efficiency water reducer; and the cement is Secar-71 cement.

[0081] The preparation method of the above-mentioned aluminum liquid corrosion resistant casting material is as follows:

[0082] (1) weighing the raw materials according to the raw material composition of the above-mentioned aluminum liquid corrosion resistant castable, and then uniformly mixing fused quartz particles, fused quartz powder, magnesium aluminum spinel powder, α-alumina powder, calcium aluminate cement, aluminum liquid resistant wetting agent and water reducing agent to obtain a mixture;

[0083] (2) adding water to the mixture prepared in step (1), stirring for 2-3 minutes to make the mixture uniform, and obtaining a wet mix castable;

[0084] (3) The wet-mixed castable prepared in step (2) is added to a sample mold fixed on a vibration table, and vibrated to form the sample. The sample is then cured for 24 hours at a humidity of not less than 90% and a temperature of 25±1°C, and then demolded to obtain a green sample. The green sample is dried at 110°C for 24 hours, and then placed in a high-temperature furnace and heated to 800°C at a heating rate of 5°C / min and calcined for 3 hours.

[0085] The contents of Examples 5-2 to 5-4 are basically the same as those of Example 5-1, except that the calcination temperatures in step (3) of the castable preparation method are different. In step (3) of the castable preparation method described in Examples 5-2 to 5-4, the calcination temperatures are 900°C, 1000°C, 1100°C, and 1200°C, respectively.

[0086] The performance of the aluminum liquid corrosion resistant castable samples described in Examples 5-1 to 5-4 was measured. The performance test method was the same as that in Example 1. The performance test results are shown in Table 9.

[0087] Table 9 Performance test results of aluminum liquid corrosion resistant casting material samples prepared in Example 5-1 to Example 5-4

[0088]

[0089] It can be seen from Table 9 that when the calcination temperature increases from 800°C to 1200°C, the apparent porosity of the prepared castable gradually decreases, and the room-temperature flexural strength and room-temperature compressive strength are both improved; among them, when the calcination temperature is 900°C to 1200°C, the aluminum-corrosion-resistant castable has good aluminum-corrosion resistance and no corrosion and penetration phenomenon; therefore, the calcination treatment temperature is preferably 900°C to 1200°C. In order to reduce the production cost and ensure the performance of the castable, the heat treatment temperature is more preferably 900°C.

[0090] Embodiment 6:

[0091] A castable material resistant to aluminum liquid corrosion is prepared from the following raw materials in parts by weight: 70 parts of fused quartz particles with a particle size of 0-8 mm, 6 parts of fused quartz micropowder with a particle size of 200 meshes, 8 parts of magnesium aluminum spinel micropowder with a particle size of 325 meshes, 8 parts of α-alumina micropowder with a particle size of 325 meshes, 8 parts of calcium aluminate cement, 0.5 parts of water reducer, 5 parts of water and 8 parts of aluminum liquid resistant wetting agent with a particle size of ≤0.075 mm; wherein the aluminum liquid resistant wetting agent is composited with BaAl2O4, BaTiO3 and V2O5, and the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the aluminum liquid resistant wetting agent is 2:1:1; the water reducer is sodium hexametaphosphate high-efficiency water reducer; and the cement is Secar-71 cement.

[0092] The preparation method of the above-mentioned aluminum liquid corrosion resistant castable is the same as that of Example 1-1.

[0093] Embodiment 7:

[0094] A castable material resistant to aluminum liquid corrosion is prepared from the following raw materials in parts by weight: 70 parts of fused quartz particles with a particle size of 0-8 mm, 5 parts of fused quartz micropowder with a particle size of 200 meshes, 6 parts of magnesium aluminum spinel micropowder with a particle size of 325 meshes, 7 parts of α-alumina micropowder with a particle size of 325 meshes, 3 parts of calcium aluminate cement, 0.5 parts of water reducer, 5 parts of water and 8 parts of aluminum liquid resistant wetting agent with a particle size of ≤0.075 mm; wherein the aluminum liquid resistant wetting agent is composited with BaAl2O4, BaTiO3 and V2O5, and the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the aluminum liquid resistant wetting agent is 2:1:1; the water reducer is sodium hexametaphosphate high-efficiency water reducer; and the cement is Secar-71 cement.

[0095] The preparation method of the above-mentioned aluminum liquid corrosion resistant castable is the same as that of Example 1-1.

[0096] Embodiment 8:

[0097] A castable material resistant to aluminum liquid corrosion is prepared from the following raw materials in parts by weight: 64 parts of fused quartz particles with a particle size of 0-8 mm, 8 parts of fused quartz micropowder with a particle size of 200 meshes, 8 parts of magnesium aluminum spinel micropowder with a particle size of 325 meshes, 10 parts of alpha-alumina micropowder with a particle size of 325 meshes, 10 parts of calcium aluminate cement, 0.8 parts of water reducer, 8 parts of water and 8 parts of aluminum liquid resistant wetting agent with a particle size of ≤0.075 mm; wherein the aluminum liquid resistant wetting agent is composited with BaAl2O4, BaTiO3 and V2O5, and the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the aluminum liquid resistant wetting agent is 2:1:1; the water reducer is sodium hexametaphosphate high-efficiency water reducer; and the cement is Secar-71 cement.

[0098] The preparation method of the above-mentioned aluminum liquid corrosion resistant castable is the same as that of Example 1-1.

[0099] Embodiment 9:

[0100] A castable material resistant to aluminum liquid corrosion is prepared from the following raw materials in parts by weight: 80 parts of fused quartz particles with a particle size of 0-8 mm, 4 parts of fused quartz micropowder with a particle size of 200 meshes, 6 parts of magnesium aluminum spinel micropowder with a particle size of 325 meshes, 5 parts of α-alumina micropowder with a particle size of 325 meshes, 5 parts of calcium aluminate cement, 0.1 parts of water reducer, 4 parts of water and 8 parts of aluminum liquid resistant wetting agent with a particle size of ≤0.075 mm; wherein the aluminum liquid resistant wetting agent is composited with BaAl2O4, BaTiO3 and V2O5, and the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the aluminum liquid resistant wetting agent is 2:1:1; the water reducer is sodium hexametaphosphate high-efficiency water reducer; and the cement is Secar-71 cement.

[0101] The preparation method of the above-mentioned aluminum liquid corrosion resistant castable is the same as that of Example 1-1.

[0102] Embodiment 10:

[0103] A castable material resistant to aluminum liquid corrosion is prepared from the following raw materials in parts by weight: 76 parts of fused quartz particles with a particle size of 0-8 mm, 6 parts of fused quartz micropowder with a particle size of 200 meshes, 4 parts of magnesium aluminum spinel micropowder with a particle size of 325 meshes, 6 parts of α-alumina micropowder with a particle size of 325 meshes, 8 parts of calcium aluminate cement, 1 part of water reducer, 10 parts of water and 8 parts of aluminum liquid resistant wetting agent with a particle size of ≤0.075 mm; wherein the aluminum liquid resistant wetting agent is composited with BaAl2O4, BaTiO3 and V2O5, and the mass ratio of BaAl2O4, BaTiO3 and V2O5 in the aluminum liquid resistant wetting agent is 2:1:1; the water reducer is sodium hexametaphosphate high-efficiency water reducer; and the cement is Secar-71 cement.

[0104] The preparation method of the above-mentioned aluminum liquid corrosion resistant castable is the same as that of Example 1-1.

[0105] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the above technical content as inspiration to make changes or modifications. This is an equivalent embodiment of equivalent changes. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical concept of the present invention still fall within the scope of protection of the claims of the present invention.

Claims

1. A castable material resistant to aluminum liquid corrosion, characterized in that: The invention is prepared from the following raw materials in parts by weight: 64-80 parts of fused quartz particles, 4-8 parts of fused quartz micropowder, 4-8 parts of magnesia alumina spinel micropowder, 5-10 parts of α-alumina micropowder, 3-10 parts of calcium aluminate cement, 4-12 parts of composite anti-aluminum liquid wetting agent, 0.1-1 part of water reducing agent and 4-10 parts of water; wherein the composite anti-aluminum liquid wetting agent is composited with BaAl2O4, BaTiO3 and V2O5.

2. The aluminum liquid corrosion resistant casting material according to claim 1, characterized in that: The mass ratio of BaAl2O4, BaTiO3 and V2O5 in the composite anti-aluminum liquid wetting agent is (2-5): (1-5): (1-5).

3. The aluminum liquid corrosion resistant casting material according to claim 2, characterized in that: The mass ratio of BaAl2O4, BaTiO3 and V2O5 in the composite anti-aluminum liquid wetting agent is 2:1:

1.

4. The aluminum liquid corrosion resistant casting material according to any one of claims 1 to 3, characterized in that: The water reducing agent is sodium tripolyphosphate and / or sodium hexametaphosphate.

5. The aluminum liquid corrosion resistant casting material according to claim 4, characterized in that: The cement is calcium aluminate cement.

6. The aluminum liquid corrosion resistant casting material according to claim 5, characterized in that: The particle size of the fused quartz particles is 0-8 mm; the particle size of the composite anti-aluminum liquid wetting agent is ≤0.075 mm; the particle size of the fused quartz micropowder is 200 mesh; the particle size of the magnesium aluminum spinel micropowder is 325 mesh; and the particle size of the α-alumina micropowder is 325 mesh.

7. Use of the aluminum liquid corrosion resistant castable according to any one of claims 1 to 6 in the preparation of aluminum liquid corrosion resistant castable products.

8. A method for preparing a castable product resistant to aluminum liquid corrosion, characterized in that: The following steps are involved: (1) Weighing each raw material according to the raw material composition of the aluminum liquid corrosion resistant castable according to any one of claims 1 to 6, and then uniformly mixing fused quartz particles, fused quartz powder, magnesium aluminum spinel powder, α-alumina powder, calcium aluminate cement, composite aluminum liquid resistant wetting agent and water reducer to obtain a mixture; (2) adding water to the mixture prepared in step (1), stirring and mixing uniformly to obtain a wet mix castable; (3) The wet-mixed castable prepared in step (2) is subjected to casting molding, curing and demoulding, drying and calcining treatment to obtain a castable product resistant to aluminum liquid corrosion.

9. The preparation method according to claim 8, characterized in that In step (3), the calcination temperature is 800-1200° C. and the calcination time is 2-4 h.

10. The preparation method according to claim 9, characterized in that During the calcination treatment, the heating rate is 2-8°C / min.

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