Method for testing influence of impurity components on temperature resistance of refractory fiber product

Abstract

The invention provides a method for testing the influence of impurity components on the temperature resistance of refractory fiber products, which comprises the following steps: a1) respectively testing the heating wire shrinkage values of a first refractory fiber product into which a first impurity component is introduced and a first refractory fiber product into which the first impurity component is not introduced to obtain a first comparison result; b1) respectively testing the heating wire shrinkage values of the second refractory fiber product into which the first impurity component is introduced and the second refractory fiber product into which the first impurity component is not introduced to obtain a second comparison result; the first refractory fiber product is different from the second refractory fiber product; and c1) comparing the first comparison result with the second comparison result, and determining the influence of the first impurity component on the temperature resistance of the first refractory fiber product and the second refractory fiber product. The test method can simulate the influence of external impurity components on the refractory fiber product, determine the influence of the impurity components on the temperature resistance of the refractory fiber product, quantify the influence of the impurity components on the temperature resistance of the refractory fiber product, and is simple, rapid and low in cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of refractory materials, and more specifically, relates to a test method for the influence of impurity components on the temperature resistance performance of refractory fiber products. Background Art

[0002] As an energy-saving furnace lining material, refractory fiber products are widely used in high-temperature kilns such as petrochemical industry, iron and steel industry, ceramic industry, battery materials, etc. Refractory fiber is a porous material with a porosity of over 90%, and a specific surface area of 0.4 - 0.8 m 2 / g. During high-temperature use, due to impurity components in fuels, or volatilization and scattering of the medium to be treated, etc., some industrial kilns contain impurity components such as alkali metal compounds (Na2O, K2O, Li2O, NaCl, KCl, LiCl, Na2CO3, K2CO3, Li2CO3, etc.), alkaline earth metal compounds (CaO, MgO, CaCl2, MgCl2, CaCO3, MgCO3, etc.), iron compounds (Fe, Fe2O3, Fe3O4, etc.). Whether these impurity components enter the fiber interior through direct contact or disperse in the high-temperature atmosphere in the form of dust, they can easily penetrate the porous structure of the fiber and interact with the refractory fiber products at high temperatures. The introduction of impurity components will lower the temperature at which the refractory fiber liquid phase is generated, accelerate the grain growth, that is, the aging rate of the fiber, seriously affecting the temperature resistance performance and service life of the refractory fiber products.

[0003] However, there has been no specific research data on the influence of different types of impurity components on the temperature resistance performance of different categories of refractory fiber products, and it is impossible to clearly explain the influence of the introduction of impurity components on the temperature resistance performance of refractory fiber products. In some industrial kilns where the introduction of impurity components cannot be avoided, there is also no specific literature data available for reference on how to select refractory fiber materials and how to minimize the influence of impurity components on refractory fiber products. If directly introducing impurity components into the raw materials to carry out the test method for the influence of impurity components on the performance of refractory fibers, on the one hand, it is impossible to simulate the influence of foreign impurity components on refractory fiber products, and on the other hand, the test process is time-consuming, laborious, and costly. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a test method for the influence of impurity components on the temperature resistance performance of refractory fiber products, which can simply, quickly, and at low cost measure the influence of impurity components on the temperature resistance performance of refractory fiber products.

[0005] The present application provides a test method for the influence of impurity components on the temperature resistance performance of refractory fiber products, including the following steps:

[0006] a1) Test the heating linear shrinkage values of the first refractory fiber product with and without the introduction of the first impurity component respectively to obtain the first comparison result;

[0007] b1) Test the heating linear shrinkage values of the second refractory fiber product with and without the introduction of the first impurity component respectively to obtain the second comparison result; the first refractory fiber product and the second refractory fiber product are different;

[0008] c1) Compare the first comparison result with the second comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product and the second refractory fiber product.

[0009] In some specific implementation manners, before step c1), it further includes:

[0010] Test the heating linear shrinkage values of the third refractory fiber product with and without the introduction of the first impurity component respectively to obtain the third comparison result; the third refractory fiber product is different from the second refractory fiber product and the first refractory fiber product;

[0011] Compare the first comparison result, the second comparison result and the third comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product, the second refractory fiber product and the third refractory fiber product.

[0012] This application also provides a test method for the influence of impurity components on the temperature resistance performance of refractory fiber products, including the following steps:

[0013] a2) Test the heating linear shrinkage values of the fourth refractory fiber product with and without the introduction of the second impurity component respectively to obtain the fourth comparison result;

[0014] b2) Test the heating linear shrinkage values of the fourth refractory fiber product with and without the introduction of the third impurity component respectively to obtain the fifth comparison result; the second impurity component and the third impurity component are different;

[0015] c2) Compare the fourth comparison result with the fifth comparison result to determine the influence of the second impurity component and the third impurity component on the temperature resistance performance of the fourth refractory fiber product.

[0016] In some specific implementation manners, before step c2), it further includes:

[0017] Test the heating linear shrinkage values of the fourth refractory fiber product with and without the introduction of the fourth impurity component respectively to obtain the sixth comparison result; the fourth impurity component is different from the second impurity component and the third impurity component;

[0018] Compare the fourth comparison result, the fifth comparison result, and the sixth comparison result to determine the effects of the second impurity component, the third impurity component, and the fourth impurity component on the temperature resistance performance of the fourth refractory fiber product.

[0019] In some specific implementation manners, the first impurity component, the second impurity component, the third impurity component, and the fourth impurity component are independently selected from one or more of impurity element-containing compounds, and the impurity elements are selected from one or more of Na, K, Li, Fe, Ca, and Mg.

[0020] In some specific implementation manners, the impurity element-containing compounds are selected from one or more of hydroxides containing impurity elements, chlorides containing impurity elements, carbonates containing impurity elements, bicarbonates containing impurity elements, nitrates containing impurity elements, organic acid salts containing impurity elements, and organic alcohol salts containing impurity elements.

[0021] In some specific implementation manners, the heating linear shrinkage value of the refractory fiber product introduced with impurity components is tested according to the following method:

[0022] Provide an impurity component solution including an impurity element-containing compound and a solvent;

[0023] Immerse the refractory fiber product in the impurity component solution to absorb the impurity components, and obtain the refractory fiber product introduced with impurity components after drying; the weight ratio of the solvent in the impurity component solution to the weight of the refractory fiber product is η, and η is the weight ratio of the solvent that can completely and uniformly immerse the refractory fiber product to the refractory fiber product.

[0024] Test the heating linear shrinkage value of the refractory fiber product introduced with impurity components.

[0025] In some specific implementation manners, the heating linear shrinkage value of the refractory fiber product without introduced impurity components is tested according to the following method:

[0026] Immerse the refractory fiber product in the solvent, and obtain the refractory fiber product without introduced impurity components after drying; the weight ratio of the solvent to the weight of the refractory fiber product is η, and η is the weight ratio of the solvent that can completely and uniformly immerse the refractory fiber product to the refractory fiber product.

[0027] Test the heating linear shrinkage value of the refractory fiber product without introduced impurity components.

[0028] In some specific implementation manners, the drying is microwave drying.

[0029] In some specific implementation manners, the refractory fiber product is a common refractory fiber product, a standard refractory fiber product, a high-purity refractory fiber product, a high-aluminum refractory fiber product, a zirconium-containing refractory fiber product, a zirconium-aluminum refractory fiber product, an alumina fiber refractory fiber product, etc.

[0030] The present invention provides a test method for the influence of impurity components on the temperature resistance performance of refractory fiber products, including the following steps: a1) respectively test the heating linear shrinkage values of a first refractory fiber product with and without the introduction of a first impurity component to obtain a first comparison result; b1) respectively test the heating linear shrinkage values of a second refractory fiber product with and without the introduction of the first impurity component to obtain a second comparison result; the first refractory fiber product and the second refractory fiber product are different; c1) compare the first comparison result and the second comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product and the second refractory fiber product. In this application, the heating linear shrinkage value is used as an index for the temperature resistance performance of refractory fiber products. The smaller the heating linear shrinkage value, the smaller the probability of shrinkage cracks occurring during the use of refractory fiber products in high-temperature kilns; under the same conditions, the smaller the heating linear shrinkage value of refractory fiber products, the better the temperature resistance performance of the products. In this application, by testing the heating linear shrinkage value of refractory fiber products with introduced impurity components, comparing it with the heating linear shrinkage value of a blank sample (i.e., a refractory fiber product without introduced impurity components), and comparing it with the heating linear shrinkage values of other different types of refractory fiber products with the same impurity component added, etc., the influence of impurity components on the temperature resistance performance of refractory fiber products is determined. The test method provided in this application can simulate the influence of foreign impurity components on refractory fiber products, determine the influence of impurity components on the temperature resistance performance of refractory fiber products, and quantify the influence of impurity components on the temperature resistance performance of refractory fiber products, which is simple, fast, and low-cost. Further, the test method provided in this application can prevent the surface migration of impurity components and uniformly introduce impurity components into refractory fiber products through the methods of complete impregnation and microwave rapid drying, which can improve the accuracy of the test. Specific embodiments

[0031] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0032] The present invention provides a test method for the influence of impurity components on the temperature resistance performance of refractory fiber products, including the following steps:

[0033] a1) Test the heating linear shrinkage values of the first refractory fiber product with and without the introduction of the first impurity component respectively to obtain the first comparison result;

[0034] b1) Test the heating linear shrinkage values of the second refractory fiber product with and without the introduction of the first impurity component respectively to obtain the second comparison result; the first refractory fiber product and the second refractory fiber product are different;

[0035] c1) Compare the first comparison result with the second comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product and the second refractory fiber product.

[0036] In order to deeply understand the influence of foreign impurity components on the temperature resistance performance of refractory fibers, facilitate the application of refractory fibers to avoid the introduction of impurity components as much as possible, and thus more scientifically select furnace lining materials, the present invention provides a simple, fast and low-cost test method for the influence of impurity components on the temperature resistance performance of refractory fiber products.

[0037] The most commonly used index to evaluate the temperature resistance performance of refractory fiber products is the heating linear shrinkage value (also known as the heating linear permanent change, and the heating linear permanent change of refractory fiber products is generally negative). The smaller the heating linear shrinkage value, the smaller the probability of shrinkage cracks occurring during the use of refractory fiber products in high-temperature kilns. Under the same conditions, the smaller the heating linear shrinkage value of the product, the better the temperature resistance performance of the product. The present invention determines the influence of impurity components on the temperature resistance performance of refractory fiber products by comparing the heating linear shrinkage values of refractory fiber products with introduced impurity components with those of blank samples (i.e., refractory fiber products without introduced impurity components), and by comparing the heating linear shrinkage values of adding the same impurity components to other different types of refractory fiber products.

[0038] The present invention first tests the heating linear shrinkage values of the first refractory fiber product with and without the introduction of the first impurity component respectively to obtain the first comparison result; then tests the heating linear shrinkage values of the second refractory fiber product with and without the introduction of the first impurity component respectively to obtain the second comparison result; the first refractory fiber product and the second refractory fiber product are different; finally, compares the first comparison result with the second comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product and the second refractory fiber product.

[0039] The method provided by this application can test the influence of the same impurity component on the temperature resistance performance of different types of refractory fiber products. In the present invention, the introduced impurity component is preferably a compound soluble in a solvent and containing impurity elements. Among them, the impurity elements are preferably selected from one or more of Na, K, Li, Fe, Ca, Mg (which can be selected according to the impurity components in the actual use environment of the kiln), and the compound is preferably one or more of hydroxides, chlorides, carbonates, bicarbonates, nitrates, organic acid salts, and organic alcohol salts. The solvent is preferably one or more mixtures of common, easily available, and non-toxic inorganic solvents or organic solvents. The present invention has no special restrictions on the source of the above-introduced impurity components, and commercially available products well-known to those skilled in the art can be used.

[0040] In a preferred embodiment of the present invention, the introduced impurity component is Na2CO3, and pure water is selected as the solvent. In a preferred embodiment of the present invention, the introduced impurity component is Fe2O3, and a dilute hydrochloric acid solution is selected as the solvent, preferably a dilute hydrochloric acid solution with a concentration of 0.5 wt% - 2 wt%.

[0041] This application has no special restrictions on the type of the refractory fiber products, including but not limited to ordinary refractory fiber products, standard refractory fiber products, high-purity refractory fiber products, high-aluminum refractory fiber products, zirconium-containing refractory fiber products, zirconium-aluminum refractory fiber products, or alumina fiber refractory fiber products, etc.

[0042] The first refractory fiber product and the second refractory fiber product are products of different types, and the influence results of the same impurity component on the temperature resistance performance of different types of refractory fiber products can be obtained. The first refractory fiber product and the second refractory fiber product can be products of the same type, but with different specific compositions, and the influence results of the same impurity component on the temperature resistance performance of refractory fiber products of the same type but with different specific compositions can be obtained.

[0043] In the present invention, the heating linear shrinkage value of the blank sample (i.e., the refractory fiber product without the introduced impurity component) is tested according to the following method:

[0044] The refractory fiber product is impregnated in the solvent, and after drying, the refractory fiber product without the introduced impurity component is obtained; the weight ratio of the solvent to the refractory fiber product is η, and η is the weight ratio of the solvent that can completely and uniformly impregnate the refractory fiber product to the refractory fiber product.

[0045] The heating linear shrinkage value of the refractory fiber product without the introduced impurity component is tested.

[0046] Specifically, it may include the following steps:

[0047] (1)Conduct an experiment on the weight ratio of the refractory fiber product that can completely and uniformly absorb the solvent, determine the weight ratio of the solvent to the product at which the solvent can completely and uniformly impregnate the refractory fiber product, and denote the weight ratio of the solvent to the refractory fiber product as η;

[0048] (2)Referring to the test method for the heating linear shrinkage value of refractory fiber products, measure a square refractory fiber product with a side length of 100 mm, with the thickness being the conventional thickness of the fiber blanket, and weigh the weight of the fiber product, denoted as: m;

[0049] (3)Weigh a solvent with a weight of mη, and uniformly and completely impregnate the above-mentioned refractory fiber products respectively; finally, rapidly dry through a microwave drying process to prepare a blank sample without impurity components;

[0050] (4)Test the heating linear shrinkage value of the said blank sample.

[0051] In some specific implementation manners, conduct 3 groups of parallel experiments, specifically including the following steps:

[0052] (1)Conduct an experiment on the weight ratio of the refractory fiber product that can completely and uniformly absorb the solvent, determine the weight ratio of the solvent to the product at which the solvent can completely and uniformly impregnate the refractory fiber product, and denote the weight ratio of the solvent to the refractory fiber product as η;

[0053] (2)Referring to the test method for the heating linear shrinkage value of refractory fiber products, measure 3 square refractory fiber products with a side length of 100 mm, with the thickness being the conventional thickness of the fiber blanket, and weigh the weights of the fiber products, denoted as: m 01 、m 02 、m 03 ;

[0054] (3)Weigh solvents with weights of m 01 η, m 02 η, m 03 η, and uniformly and completely impregnate the above-mentioned 3 refractory fiber products respectively; finally, rapidly dry through a microwave drying process to prepare a blank sample without impurity components;

[0055] (4)Test the heating linear shrinkage values of the said 3 blank samples and take the average value.

[0056] In the present invention, for the test method of the heating linear shrinkage value of the refractory fiber product in the above step (2), it is preferably referred to GB / T 17911.

[0057] In the subsequent steps of the present invention, the method determined in GB / T 17911 is also referred to for testing the heating linear shrinkage value of the above samples.

[0058] In the present invention, the heating linear shrinkage value of the refractory fiber product with introduced impurity components is tested according to the following method:

[0059] Provide an impurity component solution including a compound containing impurity elements and a solvent;

[0060] Immerse the refractory fiber product in the impurity component solution to absorb the impurity components, and obtain a refractory fiber product with introduced impurity components after drying; the weight ratio of the solvent in the impurity component solution to the weight of the refractory fiber product is η, and η is the weight ratio of the solvent that can completely and uniformly immerse the refractory fiber product to the refractory fiber product;

[0061] Test the heating linear shrinkage value of the refractory fiber product with introduced impurity components.

[0062] Specifically, it includes the following steps:

[0063] (1) Measure a refractory fiber product sample with dimensions of 100mm×100mm×product thickness, and weigh the refractory fiber product, denoted as: m1;

[0064] (2) Based on the impurity element oxide, determine the mass ratio ω of the planned introduced impurity components, calculate the quantity of the impurity element oxide: m2 = m1×ω; and convert the quantity of the impurity element oxide m2 into the weight m3 of the compound of the impurity element;

[0065] (4) Weigh the quantity of the impurity compound m3, and completely dissolve it in a solvent with a weight of m1η; then immerse the above refractory fiber sample in the above solution, ensure that the fiber product uniformly and completely absorbs the above solution and then dry it to prevent the surface migration of the impurity components, and obtain a refractory fiber product with introduced impurity components;

[0066] (5) Test the heating linear shrinkage value of the refractory fiber product with introduced impurity components.

[0067] In some specific implementation manners, conduct 3 groups of parallel experiments, specifically including the following steps:

[0068] (1) Similarly, measure 3 refractory fiber product samples with dimensions of 100mm×100mm×product thickness, and weigh the refractory fiber products, denoted as: m 11 、m 12 、m 13 ;

[0069] (2) Based on the impurity element oxide, determine the mass ratio ω of the planned introduced impurity components, calculate the quantity of the impurity element oxide: m 21 = m 11 ×ω; m 22 = m 12 ×ω; m 23 = m 13 ×ω; and convert the quantity of the impurity element oxide m 21 、m22 , m 23 Replace with the weight m of the compound of the impurity element 31 , m 32 , m 33 ;

[0070] (4) Weigh the quantity m of the impurity compound 31 , m 32 , m 33 , completely dissolve it in a solvent with a weight of m 11 η, m 12 η, m 13 η; then immerse the above 3 refractory fiber samples in the above 3 solutions. After ensuring that the fiber products uniformly and completely absorb the above solutions, dry them to prevent the surface migration of impurity components, and obtain refractory fiber products with introduced impurity components;

[0071] (5) Test the heating linear shrinkage values of the 3 refractory fiber products with introduced impurity components, and take the average value.

[0072] In the present invention, the immersion method described in the above step (4) is preferably complete immersion; the drying method is preferably microwave drying.

[0073] In the present invention, the test method for the heating linear shrinkage preferably refers to GB / T 17911, that is, for the obtained refractory fiber products with introduced impurity components, also refer to the method determined in GB / T 17911 to test the heating linear shrinkage value of the sample.

[0074] After obtaining the heating linear shrinkage values of the first refractory fiber product with the first impurity component introduced and without the first impurity component introduced, obtain the first comparison result; then obtain the second comparison result of the second refractory fiber product with the first impurity component introduced and without the first impurity component introduced in the same method, and compare the first comparison result and the second comparison result to determine the influence of the same first impurity component on the temperature resistance performance of different first refractory fiber products and second refractory fiber products.

[0075] In some specific implementation manners, before step c1), it further includes: respectively testing the heating linear shrinkage values of the third refractory fiber product with the first impurity component introduced and without the first impurity component introduced, and obtaining the third comparison result; the third refractory fiber product is different from the second refractory fiber product and the first refractory fiber product;

[0076] Compare the first comparison result, the second comparison result and the third comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product, the second refractory fiber product and the third refractory fiber product.

[0077] A third refractory fiber product that is different from both the first refractory fiber product and the second refractory fiber product is obtained by the same method as described above, and a third comparison result of introducing the first impurity component and not introducing the first impurity component is obtained. By comparing the first comparison result, the second comparison result, and the third comparison result, the influence of the same first impurity component on the temperature resistance of different first refractory fiber products, second refractory fiber products, and third refractory fiber products can be determined.

[0078] The present application also provides a test method for the influence of impurity components on the temperature resistance of refractory fiber products, including the following steps:

[0079] a2) Respectively test the heating linear shrinkage values of a fourth refractory fiber product with and without the introduction of a second impurity component to obtain a fourth comparison result;

[0080] b2) Respectively test the heating linear shrinkage values of a fourth refractory fiber product with and without the introduction of a third impurity component to obtain a fifth comparison result; the second impurity component and the third impurity component are different;

[0081] c2) Compare the fourth comparison result and the fifth comparison result to determine the influence of the second impurity component and the third impurity component on the temperature resistance of the fourth refractory fiber product.

[0082] The method provided by the present application can test the influence of different impurity components on the temperature resistance of refractory fiber products of the same type. Specifically, according to the same method as described above, the heating linear shrinkage values of a fourth refractory fiber product with and without the introduction of a second impurity component are respectively tested to obtain a fourth comparison result; then the heating linear shrinkage values of a fourth refractory fiber product with and without the introduction of a third impurity component are respectively tested to obtain a fifth comparison result; the second impurity component and the third impurity component are different; finally, the fourth comparison result and the fifth comparison result are compared to determine the influence of different second impurity components and third impurity components on the temperature resistance of the fourth refractory fiber product.

[0083] In some specific implementation manners, before step c2), it further includes: respectively testing the heating linear shrinkage values of a fourth refractory fiber product with and without the introduction of a fourth impurity component to obtain a sixth comparison result; the fourth impurity component is different from the second impurity component and the third impurity component;

[0084] Compare the fourth comparison result, the fifth comparison result, and the sixth comparison result to determine the influence of the second impurity component, the third impurity component, and the fourth impurity component on the temperature resistance of the fourth refractory fiber product.

[0085] The fourth refractory fiber product is obtained by the same method as described above. A fourth impurity component that is different from both the second impurity component and the third impurity component is introduced, and a sixth comparison result without introducing the fourth impurity component is obtained. By comparing the fourth comparison result, the fifth comparison result, and the sixth comparison result, the effects of different second impurity components, third impurity components, and fourth impurity components on the temperature resistance performance of the same fourth refractory fiber product can be determined.

[0086] In this application, the heating linear shrinkage value is used as an index for the temperature resistance performance of refractory fiber products. By testing the heating linear shrinkage value of refractory fiber products with introduced impurity components and comparing it with the heating linear shrinkage value of a blank sample (i.e., a refractory fiber product without introduced impurity components), and comparing it with the heating linear shrinkage values of other different types of refractory fiber products with the same added impurity components, etc., the effects of impurity components on the temperature resistance performance of refractory fiber products are determined. The testing method provided in this application can simulate the influence of foreign impurity components on refractory fiber products, determine the effects of impurity components on the temperature resistance performance of refractory fiber products, quantify the effects of impurity components on the temperature resistance performance of refractory fiber products, and is simple, fast, and low-cost. Further, the testing method provided in this application uses the methods of complete impregnation and microwave rapid drying to prevent the surface migration of impurity components and uniformly introduce impurity components into refractory fiber products, which can improve the accuracy of the test.

[0087] To further illustrate the present invention, the following examples are used for detailed description.

[0088] Example 1: Test on the Influence of Impurity Na on the Temperature Resistance Performance of High-Aluminum Ceramic Fiber Blankets

[0089] The refractory fiber product to be tested is a high-aluminum ceramic fiber blanket with a thickness of 25 mm and a bulk density of 128 kg / m 3 . The test impurity component compound is the carbonate of Na (Na2CO3), and pure water is selected as the solvent.

[0090] 1. Preparation of blank sample:

[0091] (1) First, conduct a water absorption performance test on the high-aluminum ceramic fiber blanket to determine that the weight ratio range of the solvent to the refractory fiber product is: 3.5 - 4.5, and the finally determined η value is: 4.0;

[0092] (2) Referring to the test method for the heating linear shrinkage value of refractory fiber products (GB / T 17911), measure 3 square high-aluminum ceramic fiber blanket samples with a side length of 100 mm, and weigh the fiber blanket, denoted as: m 01 = 32.50 g, m 02 = 33.6 g, m 03 = 31.04 g;

[0093] (3) Weigh respectively weights of m01 η=32.5×4=130.0g,m 02 η=33.6×4=134.4g,m 03 η=31.04×4=124.16g pure water is used to evenly and completely immerse the above three fiber blanket samples respectively; finally, the samples are quickly dried by microwave drying process to prepare blank samples without impurity components;

[0094] (4) According to the method specified in GB / T 17911, the three blank samples were tested for 1350℃×24h heating linear shrinkage values of 2.8%, 2.9%, and 2.7% respectively, and the average linear shrinkage value was 2.8%. This is the same as the heating linear shrinkage value of the high-aluminum ceramic fiber blanket tested in daily testing, indicating that there is no significant difference between the heating linear shrinkage value of the blank sample and the non-impregnated sample.

[0095] 2. Preparation of samples containing Na impurities:

[0096] (1) Similarly, take three square high-aluminum ceramic fiber blanket samples with a side length of 100 mm and weigh the weight of the fiber products, recorded as: m 11 =33.40g, m 12 =32.78g, m 13 =31.85g;

[0097] (2) Based on Na2O, determine the mass ratio of the impurity components to be introduced, ω = 1.5%wt., and calculate the planned amount of Na2O to be added: m 21 =33.40g×1.5%wt.=0.50g;m 22 =32.78g×1.5%wt.=0.49g;m 23 =31.85×1.5%wt.=0.48g. And the amount of impurity element oxide (Na2O) m 21 、m 22 、m 23 The weight of the compound (Na2CO3) replaced by the impurity element:

[0098] m 31 ;

[0099] m 32 ;

[0100] m 33 ;

[0101] (4) Weigh the weight of Na2CO3: m 31 =0.86g, m 32 =0.84g, m 33= 0.82 g, and they were completely dissolved in solvents with weights of m 11 η = 33.40 × 4 = 133.60 g, m 12 η = 32.78 × 4 = 131.12 g, m 13 η = 31.85 × 4 = 127.40 g respectively, and stirred evenly to prepare Na2CO3 solutions. Then the above 3 fiber blanket samples were impregnated in the above 3 solutions to ensure that the fiber blankets uniformly and completely absorbed the solutions. Finally, they were quickly dried by microwave to prevent the surface migration of impurity components, and samples containing Na impurity components were prepared;

[0102] (5) Referring to the method determined in GB / T 17911, the heating linear shrinkage values of the above 3 impurity-containing samples at 1350 °C × 24 h were tested as 3.1%, 3.2%, and 3.1% respectively, and the average linear shrinkage value was 3.1%. Compared with the case without introducing impurity components, the heating linear shrinkage value increased by 0.3%, and the increase ratio was 10.7%.

[0103] Example 2: Test on the effect of impurity Na on the heat resistance of zirconium-aluminum type ceramic fiber blankets

[0104] The classification temperature of zirconium-aluminum type ceramic fiber blankets is the same as that of high-aluminum type ceramic fiber blankets, both are 1350 °C. The effect of Na on the heat resistance of zirconium-aluminum type ceramic fiber blankets was tested to judge the effect of impurity Na on the heat resistance of the two refractory fiber products.

[0105] The tested fiber blanket thickness is 25 mm, and the bulk density is 128 kg / m 3 . The same method as in Example 1 was adopted. The content of the added impurity component was calculated based on Na2O and was also 1.5% wt. The test conditions for the heating linear shrinkage value were also 1350 °C × 24 h. The heating linear shrinkage values of the 3 blank samples were 2.9%, 3.0%, and 2.9% respectively, and the average value was 2.9%; the heating linear shrinkage values of the samples with added impurity components were 12.6%, 12.1%, and 12.5% respectively, and the average value was 12.4%. Compared with the case without introducing impurity components, the heating linear shrinkage value of the impurity-containing samples increased by 9.5%, and the increase ratio was 328%.

[0106] As can be seen from the above Examples 1 and 2: Although the classification temperatures of both high-alumina ceramic fiber and zirconium-aluminum ceramic fiber are 1350°C, and the heating linear shrinkage values of the two blank samples at 1350°C×24h are also basically the same, the heating linear shrinkage value of the high-alumina ceramic fiber blanket with 1.5%wt. Na2O impurity component added is much lower than that of the zirconium-aluminum ceramic fiber blanket with 1.5%wt. Na2O impurity component added, indicating that the high-alumina ceramic fiber blanket has better resistance to Na impurities. In industrial furnaces where the temperature resistance performance of both refractory fiber products can meet the requirements and contain Na impurity components, high-alumina ceramic fiber products are preferred over zirconium-aluminum ceramic fiber products. Through comparison tests similar to Examples 1 and 2, we can study the influence of the same impurity component on the temperature resistance performance of different types of refractory fiber products, providing a basis for the selection of refractory fiber linings.

[0107] Example 3: Test on the Influence of Impurity Fe on the Temperature Resistance Performance of Zirconium-Aluminum Ceramic Fiber Blanket

[0108] The refractory fiber product to be tested is a zirconium-aluminum ceramic fiber blanket with a thickness of 25 mm and a bulk density of 128 kg / m 3 . The test impurity component compound is the oxide of Fe (Fe2O3), and the solvent selected is 1% dilute hydrochloric acid solution.

[0109] The same test method as in Example 1 is adopted, with the difference that the selected solvent is 1% dilute hydrochloric acid solution. The content of the added impurity component is calculated based on Fe2O3, and is also 1.5 wt.%. The test conditions for the heating linear shrinkage value are also 1350°C×24h. The heating linear shrinkage values of the 3 blank samples are: 2.8%, 2.9%, 3.0%, and the average value is: 2.9%; the heating linear shrinkage values of the samples with the added impurity component are: 5.6%, 5.8%, 5.5%, and the average value is: 5.6%. Compared with the case without the introduction of impurity components, the heating linear shrinkage value of the sample containing 1.5%wt. Fe2O3 increased by 2.7%, and the increase ratio is 93%.

[0110] For zirconium-aluminum ceramic fiber, both Fe2O3 and Na2O are impurity components. As can be seen from the comparison between Example 2 and Example 3 above: There are also significant differences in the heating linear shrinkage values of the samples with the same impurity component content added. The heating linear shrinkage value of the sample with Na2O impurity added is larger, and the heating linear shrinkage value of the sample with Fe2O3 impurity added is relatively smaller. This group of tests reminds us to strictly control the introduction of Na2O impurities during the production and use of ceramic fiber products. Through comparison tests similar to Example 2 and Example 3, we can determine the influence of different types of impurity components on the temperature resistance performance of the same refractory fiber product, providing guidance for the selection of raw materials and the selection of raw materials and energy materials for some users.

[0111] The foregoing description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test method for the influence of impurity components on the temperature resistance performance of refractory fiber products, characterized in that, It includes the following steps: a1) Test the heating linear shrinkage values of the first refractory fiber product with and without the introduction of the first impurity component respectively, and obtain the first comparison result; b1) Test the heating linear shrinkage values of the second refractory fiber product with and without the introduction of the first impurity component respectively, and obtain the second comparison result; The first refractory fiber product and the second refractory fiber product are different; c1) Compare the first comparison result with the second comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product and the second refractory fiber product.

2. The test method according to claim 1, wherein Before step c1), it also includes: Test the heating linear shrinkage values of the third refractory fiber product with and without the introduction of the first impurity component respectively, and obtain the third comparison result; the third refractory fiber product is different from the second refractory fiber product and the first refractory fiber product; Compare the first comparison result, the second comparison result and the third comparison result to determine the influence of the first impurity component on the temperature resistance performance of the first refractory fiber product, the second refractory fiber product and the third refractory fiber product.

3. A test method for the influence of an impurity component on the temperature resistance performance of a refractory fiber product, characterized in that, It includes the following steps: a2) Test the heating linear shrinkage values of the fourth refractory fiber product with and without the introduction of the second impurity component respectively, and obtain the fourth comparison result; b2) Test the heating linear shrinkage values of the fourth refractory fiber product with and without the introduction of the third impurity component respectively, and obtain the fifth comparison result; the second impurity component and the third impurity component are different; c2) Compare the fourth comparison result with the fifth comparison result to determine the influence of the second impurity component and the third impurity component on the temperature resistance performance of the fourth refractory fiber product.

4. The test method according to claim 3, characterized in that, Before step c2), it also includes: Test the heating linear shrinkage values of the fourth refractory fiber product with and without the introduction of the fourth impurity component respectively, and obtain the sixth comparison result; the fourth impurity component is different from the second impurity component and the third impurity component; Compare the fourth comparison result, the fifth comparison result and the sixth comparison result to determine the influence of the second impurity component, the third impurity component and the fourth impurity component on the temperature resistance performance of the fourth refractory fiber product.

5. The test method according to any one of claims 1 to 4, characterized in that The first impurity component, the second impurity component, the third impurity component and the fourth impurity component are independently selected from one or more of the impurity element-containing compounds, and the impurity elements are selected from one or more of Na, K, Li, Fe, Ca, Mg.

6. The test method according to claim 5, characterized in that The impurity element-containing compound is selected from one or more of the hydroxides containing impurity elements, the chlorides containing impurity elements, the carbonates containing impurity elements, the bicarbonates containing impurity elements, the nitrates containing impurity elements, the organic acid salts containing impurity elements and the organic alcohol salts containing impurity elements.

7. The test method according to claim 5, characterized in that, The heating linear shrinkage value of the refractory fiber product introduced with the impurity component is tested according to the following method: Provide an impurity component solution including the impurity element-containing compound and a solvent; Immerse the refractory fiber product in the impurity component solution to absorb the impurity component, and obtain the refractory fiber product introduced with the impurity component after drying; The weight ratio of the solvent in the impurity component solution to the refractory fiber product is η, where η is the weight ratio of the solvent that can completely and uniformly impregnate the refractory fiber product to the refractory fiber product; Test the linear heat shrinkage value of the refractory fiber product into which the impurity component is introduced.

8. The test method according to claim 7, wherein The linear heat shrinkage value of the refractory fiber product without the introduced impurity component is tested according to the following method: Immerse the refractory fiber product in the solvent, and after drying, obtain the refractory fiber product without the introduced impurity component; the weight ratio of the solvent to the refractory fiber product is η, where η is the weight ratio of the solvent that can completely and uniformly impregnate the refractory fiber product to the refractory fiber product; Test the linear heat shrinkage value of the refractory fiber product without the introduced impurity component.

9. The test method according to claim 8, wherein The drying is microwave drying.

10. The test method according to claim 5, characterized in that, The refractory fiber product is a common type refractory fiber product, a standard type refractory fiber product, a high purity type refractory fiber product, a high alumina type refractory fiber product, a zirconium-containing type refractory fiber product, a zirconium-aluminum type refractory fiber product, or an alumina fiber refractory fiber product.