Porous combustion medium body and preparation method and application thereof

Abstract

The invention discloses a porous combustion medium body and a preparation method and application thereof, and the preparation method of the porous combustion medium body comprises the following steps: step 1, constructing a first basic cell element body of the porous combustion medium body, a plurality of first basic cell element bodies are arrayed in the length direction, the width direction and the height direction of the first basic cell element bodies to form a first-layer geometry of the porous combustion medium body; 2, second basic cell element bodies of the porous combustion medium body are constructed on the first-layer geometry, and a plurality of second basic cell element bodies are arrayed in the length direction, the width direction and the height direction of the second basic cell element bodies to form a second-layer geometry of the porous combustion medium body; wherein the first basic cell element body and the second basic cell element body at the junction of the first-layer geometry and the second-layer geometry are integrally formed and correspond to each other, and the hole ribs on the inner side of the second basic cell element body need to be mutually coupled with the hole ribs on the outermost side of the corresponding first basic cell element body.

Description

Technical Field

[0001] The present invention belongs to the technical field of burners, and particularly relates to a porous combustion medium body, a preparation method thereof, and an application thereof. Background Art

[0002] At present, porous medium combustion technology has the advantages of high combustion efficiency, low pollutant emissions, high combustion intensity, stable combustion, and miniaturization of equipment. It has significant advantages in energy conservation, emission reduction, and environmental protection. Therefore, most burners on the market adopt porous medium structures.

[0003] The structures of porous media mainly include four types: fiber network, particle packing, straight pore network, and foam type. The materials mainly include two categories: metal materials and non-metal materials.

[0004] The production technology of metal fiber structures is difficult, the preparation cost is relatively high, and the solid skeleton of the porous medium needs to bear high thermal stress, and the structure is extremely easy to deform; the flow and heat transfer characteristics of particle packing structures are poor, the structure is loose and unstable, affecting its performance and service life in applications; the manufacturing cost of straight pore network structures is high, there are flow dead corners, and the structure is extremely easy to break when bearing high stress and thermal stress.

[0005] The foam ceramic porous medium structure has the advantages of a relatively narrow pore size distribution range, high porosity, large specific surface area, and good thermal shock resistance. In addition, the foam ceramic porous medium structure is prepared from inorganic materials such as Al2O3, ZrO2, and SiC, solving the problem of easy deformation of the structure, and gradually becoming the dominant design for industrial porous medium burners in recent years.

[0006] However, existing high-temperature industrial porous medium burners mostly adopt a double-layer or multi-layer gradually changing pore composite structure. However, it is extremely easy for the flow area to suddenly change due to size mismatch between multi-layer skeleton structures, resulting in unstable combustion at the interface. Based on existing production technologies, the pore unit arrangement of this porous structure is irregular, making the pore structure and size uncontrollable, resulting in limited regulation range of multi-temperature domain combustion efficiency when using this structure. Summary of the Invention

[0007] In order to solve the above technical problems, the purpose of the present invention is to provide a preparation method of a porous combustion medium body with a simple structure and a simple preparation method. The porous combustion medium body utilizes a topological structure and is integrally formed, capable of synergistically optimizing the pore structure at multiple scales, and simultaneously optimizing the material distribution, enabling the material to more effectively bear the load when stressed, while optimizing its heat transfer performance while ensuring the bearing performance.

[0008] In order to achieve the above purpose, the technical solution of the present invention is as follows: A preparation method of a porous combustion medium body, comprising the following steps:

[0009] Step 1: Construct the first basic cell body of the porous combustion medium body, and array multiple of the first basic cell bodies along its length, width, and height directions respectively to form the first layer geometric body of the porous combustion medium body;

[0010] Step 2: Construct the second basic cell body of the porous combustion medium body on the first layer geometric body, and array multiple of the second basic cell bodies along its length, width, and height directions respectively to form the second layer geometric body of the porous combustion medium body;

[0011] Among them, the first basic cell body and the second basic cell body at the junction of the first layer geometric body and the second layer geometric body are integrally formed and correspond to each other, and the inner pore ribs of the second basic cell body need to be coupled with the outermost pore ribs of the corresponding first basic cell body.

[0012] In the above technical solution, the first basic cell body is arrayed n1, n2, n3 along its length, width, and height directions respectively, and the second basic cell body is arrayed n4, n5, n6 along its length, width, and height directions respectively; among them, the parameters are as follows:

[0013]

[0014] H2 = H - H1 Formula Four;

[0015]

[0016] Among them, H is the height of the porous combustion medium body, H1 is the height of the first layer geometric body, L is the length of the porous combustion medium body, W is the width of the porous combustion medium body, H2 is the height of the first layer geometric body, a1 is the side length of the first basic cell body, θ1 is the angle between the meridian plane of the first basic cell body and the Z-axis, β1 is the angle between the meridian plane of the first basic cell body and the X-axis, d1 is the pore rib of the first basic cell body, a2 is the side length of the second basic cell body, θ2 is the angle between the meridian plane of the second basic cell body and the Z-axis, β2 is the angle between the meridian plane of the second basic cell body and the X-axis, and d2 is the pore rib of the second basic cell body.

[0017] In the above technical solution, H is 20 - 75 mm, H1 is 12 - 51 mm, L is 51 - 306 mm, W is 51 - 306 mm, H2 is 8 - 24 mm, β1 is 0 - 60°, θ1 is 0 - 60°, d1 is 0.6 - 3.4 mm, a1 is 4 - 6 mm, d2 is 0.3 - 1.5 mm, and a2 is equal to a1, θ2 is equal to θ1, and β2 is equal to β1. Note: When the diameter is less than the selected range, the porosity will be higher than 99%, the mechanical properties of the porous combustion medium body will be lower, and the service life will be sharply reduced; when the diameter is greater than the selected range, the porosity is lower than 72%, the pore structure of the porous medium combustion body is blocked, seriously affecting the combustion performance; due to the basic unit cell of the porous medium combustion body being a centrosymmetric structure, θ and β within this range can achieve arbitrary rotation in three-dimensional space.

[0018] In the above technical solution, the porous combustion medium body is a cylinder or a polyhedron, and the cross-section of the pore ribs of the porous combustion medium body is a round hole.

[0019] In the above technical solution, the diameter of the pore ribs of the porous combustion medium body is 0.3 - 3.4 mm; the porosity of the porous combustion medium body is 72 - 99%.

[0020] In the above technical solution, the porous combustion medium body is prepared by printing with a 3D printing slurry, coating with a slurry, and then drying and sintering at high temperature.

[0021] In the above technical solution, the 3D printing slurry is one of photosensitive resin, polyurethane, polyvinyl alcohol, silicon carbide powder, and carbon black.

[0022] In the above technical solution, the material of the slurry is at least one of alumina, zirconia, and silicon carbide.

[0023] The second object of the present invention is to provide a porous combustion medium body with good structural strength and good hole effect, and the porous combustion medium body is prepared by the preparation method described above.

[0024] The third object of the present invention is to provide an application of the porous combustion medium body described above for filling the inner liner of an industrial burner.

[0025] The beneficial effects of the present invention are as follows: The porous combustion medium body provided by the present invention adopts the topology structure integration technology, and the pore structure is synergistically optimized and designed at multiple scales (the pore distribution is uniform and interconnected), which can achieve optimization in material distribution, enabling the material to more effectively bear the load when stressed, while ensuring the bearing performance and optimizing its heat transfer performance; in addition, in the present invention, both the first basic unit cell and the second basic unit cell adopt a circular shape as the cross-section of the pore ribs, and the porous combustion medium body in an array is used as the framework, which can disperse the stress at the pore tips and meet the requirement of reducing local thermal stress concentration; by adjusting the pore size and angle of the porous combustion medium body, the porosity of the porous combustion medium body can vary within the range of 72-99%; the porous combustion medium body of the present invention is formed into a three-dimensional space pore framework by 3D printing technology, the framework structure is continuously distributed, and the interface is integrally formed, and it will not be limited by the preparation technology so that the pore structure and size are uncontrollable, and it will not affect the interface combustion efficiency and service life; the combustion intensity of the burner using this porous combustion medium body can reach up to 0.19 kw / m 3 , NO x concentration ≤ 16 ppm, CO concentration ≤ 90 ppm, the service life ≥ 2000 times at the service temperature of 1200°C - 1400°C. At the same time, it has the advantages of excellent structural performance, large-range controllable porosity, high combustion intensity, high combustion efficiency, stable combustion, low pollutant emissions, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the first basic unit cell in the embodiment of the present invention;

[0027] Figure 2 It is a composite diagram of the first basic unit cell and the second basic unit cell in the embodiment of the present invention;

[0028] Figure 3 It is a front view of the porous combustion medium body in the embodiment of the present invention.

[0029] Figure 4 It is an oblique view of the porous combustion medium body in the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be clearer according to the following description and the claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0031] As Figures 1-4As shown in the figure, this embodiment provides a method for preparing a porous combustion medium body, including the following steps:

[0032] Step 1: Construct a first basic cell body of the porous combustion medium body, and array multiple of the first basic cell bodies along its length, width, and height directions respectively to form the first layer geometry of the porous combustion medium body;

[0033] Step 2: Construct a second basic cell body of the porous combustion medium body on the first layer geometry, and array multiple of the second basic cell bodies along its length, width, and height directions respectively to form the second layer geometry of the porous combustion medium body;

[0034] Among them, the first basic cell body and the second basic cell body at the junction of the first layer geometry and the second layer geometry are integrally formed and correspond to each other, and the inner pore ribs of the second basic cell body need to be coupled with the outermost pore ribs of the corresponding first basic cell body.

[0035] In the above technical solution, the first basic cell body is arrayed n1, n2, and n3 along its length, width, and height directions respectively; the second basic cell body is arrayed n4, n5, and n6 along its length, width, and height directions respectively;

[0036] Among them, the parameters are as follows:

[0037]

[0038] H2 = H - H1 Formula Four;

[0039]

[0040] Among them, H is the height of the porous combustion medium body, H1 is the height of the first layer geometry, L is the length of the porous combustion medium body, W is the width of the porous combustion medium body, H2 is the height of the first layer geometry, a1 is the side length of the first basic cell body, θ1 is the angle between the meridian plane of the first basic cell body and the Z axis, β1 is the angle between the meridian plane of the first basic cell body and the X axis, d1 is the pore rib of the first basic cell body, a2 is the side length of the second basic cell body, θ2 is the angle between the meridian plane of the second basic cell body and the Z axis, β2 is the angle between the meridian plane of the second basic cell body and the X axis, and d2 is the pore rib of the second basic cell body.

[0041] In the above technical solution, H is 20 - 75 mm (which can be any value among 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, and 75 mm or the corresponding range between any two values), H1 is 12 - 51 mm (which can be any value among 12 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, and 51 mm or the corresponding range between any two values), L is 51 - 306 mm (which can be any value among 51 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, 250 mm, 260 mm, 270 mm, 280 mm, 290 mm, 300 mm, and 306 mm or the corresponding range between any two values), W is 51 - 306 mm (which can be any value among 51 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, 250 mm, 260 mm, 270 mm, 280 mm, 290 mm, 300 mm, and 306 mm or the corresponding range between any two values), H2 is 8 - 24 mm (which can be any value among 8 mm, 10 mm, 15 mm, 20 mm, and 24 mm or the corresponding range between any two values), β1 is 0 - 60° (which can be any value among 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, and 60° or the corresponding range between any two values), θ1 is 0 - 60° (which can be any value among 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, and 60° or the corresponding range between any two values), d1 is 0.6 - 3.4 mm (which can be any value among 0.6 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, and 3.4 mm or the corresponding range between any two values), a1 is 4 - 6 mm (which can be any value among 4 mm, 4.5 mm, 5 mm, 5.5 mm, and 6 mm or the corresponding range between any two values), d2 is 0.3 - 1.5 mm (which can be any value among 0.3 mm, 0.5 mm, 1 mm, and 1.5 mm or the corresponding range between any two values), and a2 is equal to a1, θ2 is equal to θ1, and β2 is equal to β1.n1 is 1 - 3 (which can be 1, 2, or 3), n2 is 3 - 25 (which can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25), n3 is 3 - 25 (which can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25), n4 is 2 - 4 (which can be 2, 3, or 4), n5 is 6 - 51 (which can be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, or 51), n6 is 6 - 51 (which can be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, or 51).

[0042] In the above technical solution, the porous combustion medium body is a cylinder or a polyhedron, and the cross - section of the pore ribs of the porous combustion medium body is a circular hole; the diameter of the pore ribs of the porous combustion medium body is 0.3 - 3.4 mm; the porosity of the porous combustion medium body is 72 - 99%; the porous combustion medium body is prepared by printing with a 3D printing slurry, coating with a slurry, and then drying and high - temperature sintering; the 3D printing slurry is one of photosensitive resin, polyurethane, polyvinyl alcohol, silicon carbide powder, and carbon black (preparing the 3D printing slurry with water as the solvent); the material of the slurry is at least one of alumina, zirconia, and silicon carbide (preparing the slurry with water as the solvent).

[0043] Example 1

[0044] In this embodiment, the parameters of the porous combustion medium are as follows: the first basic unit cell is a regular tetrakaidecahedron, and the second basic unit cell is a ditrigonal hexacontahedron. Among them, take H = 35, H1 = 23mm, L = 204mm, W = 204mm, H2 = 12mm, a1 is 4mm, θ1 is 0°, β1 is 0°, and d1 is 0.6mm. Among them, n1 is 2, n2 is 17, n3 is 17, a2 is identical to a1, θ2 is identical to θ1, β2 is identical to β1, and d2 is 0.3mm. The inner pore ribs of the second basic unit cell need to be coupled with the outermost pore ribs of the first basic unit cell, n4 is 3, n5 is 34, and n6 is 34. After testing, the porosity of this porous combustion medium is 98%, and the combustion intensity can reach 0.17 kw / m 3 , NO x concentration ≤ 14 ppm, CO concentration ≤ 42 ppm, and the service life is ≥ 2000 times at the service temperature of 1200°C - 1400°C.

[0045] Example 2

[0046] In this embodiment, the parameters of the porous combustion medium are as follows: the first basic unit cell is a regular tetrakaidecahedron, and the second basic unit cell is a ditrigonal hexacontahedron. Among them, take H = 35mm, H1 = 23mm, L = 204mm, W = 204mm, H2 = 12mm, a1 is 4mm, θ1 is 0°, β1 is 0°, and d1 is 1mm. Among them, n1 is 2, n2 is 17, n3 is 17, a2 is identical to a1, θ2 is identical to θ1, β2 is identical to β1, and d2 is 0.6mm. The inner pore ribs of the second basic unit cell need to be coupled with the outermost pore ribs of the first basic unit cell, n4 is 3, n5 is 34, and n6 is 34. After testing, the porosity of this porous combustion medium is 93%, and the combustion intensity can reach 0.15 kw / m 3 , NO x concentration ≤ 12 ppm, CO concentration ≤ 48 ppm, and the service life is ≥ 2000 times at the service temperature of 1200°C - 1400°C.

[0047] Example 3

[0048] In this embodiment, the parameters of the porous combustion medium body are as follows: the first basic cell body is a regular tetrakaidecahedron, and the second basic cell body is a double oblique hexahedron. Among them, take H = 35 mm, H1 = 23 mm, L = 204 mm, W = 204 mm, H2 = 12 mm, a1 is 4 mm, θ1 is 0°, β1 is 0°, and d1 is 3.2 mm. Among them, n1 is 2, n2 is 17, n3 is 17, a2 is identical to a1, θ2 is identical to θ1, β2 is identical to β1, and d2 is 1.5 mm. The inner pore ribs of the second basic cell body need to be coupled with the outermost pore ribs of the first basic cell body, n4 is 3, n5 is 34, and n6 is 34. After testing, the porosity of this porous combustion medium body is 72%, and the combustion intensity can reach 0.06 kw / m 3 , NO x concentration ≤ 5 ppm, CO concentration ≤ 90 ppm, and the service life is ≥ 2000 times at the service temperature of 1200°C - 1400°C.

[0049] Example 4

[0050] In this embodiment, the parameters of the porous combustion medium body are as follows: the first basic cell body is a regular tetrakaidecahedron, and the second basic cell body is a double oblique hexahedron. Among them, take H = 52 mm, H1 = 34 mm, L = 204 mm, W = 204 mm, H2 = 18 mm, a1 is 6 mm, θ1 is 0°, β1 is 0°, and d1 is 0.6 mm. Among them, n1 is 2, n2 is 12, n3 is 12, a2 is identical to a1, θ2 is identical to θ1, β2 is identical to β1, and d2 is 0.3 mm. The inner pore ribs of the second basic cell body need to be coupled with the outermost pore ribs of the first basic cell body, n4 is 3, n5 is 24, and n6 is 24. After testing, the porosity of this porous combustion medium body is 99%, and the combustion intensity can reach 0.19 kw / m 3 , NO x concentration ≤ 16 ppm, CO concentration ≤ 40 ppm, and the service life is ≥ 2000 times at the service temperature of 1200°C - 1400°C.

[0051] Example 5

[0052] In this embodiment, the parameters of the porous combustion medium are as follows: the first basic cell is a regular tetrakaidecahedron, and the second basic cell is a double oblique hexahedron. Among them, take H = 52 mm, H1 = 34 mm, L = 204 mm, W = 204 mm, H2 = 18 mm, a1 is 6 mm, θ1 is 0°, β1 is 0°, and d1 is 1.9 mm. Among them, n1 is 2, n2 is 12, n3 is 12, a2 is identical to a1, θ2 is identical to θ1, β2 is identical to β1, and d2 is 1 mm. The inner pore ribs of the second basic cell need to be coupled with the outermost pore ribs of the first basic cell, n4 is 3, n5 is 24, and n6 is 24. After testing, the porosity of this porous combustion medium is 92%, and the combustion intensity can reach 0.14 kw / m 3 , NO x concentration ≤ 10 ppm, CO concentration ≤ 52 ppm, and the service life is ≥ 2000 times at the service temperature of 1200°C - 1400°C.

[0053] Example 6

[0054] In this embodiment, the parameters of the porous combustion medium are as follows: the first basic cell is a regular tetrakaidecahedron, and the second basic cell is a double oblique hexahedron. Among them, take H = 52 mm, H1 = 34 mm, L = 204 mm, W = 204 mm, H2 = 18 mm, a1 is 6 mm, θ1 is 0°, β1 is 0°, and d1 is 3.4 mm. Among them, n1 is 2, n2 is 12, n3 is 12, a2 is identical to a1, θ2 is identical to θ1, β2 is identical to β1, and d2 is 1.5 mm. The inner pore ribs of the second basic cell need to be coupled with the outermost pore ribs of the first basic cell, n4 is 3, n5 is 24, and n6 is 24. After testing, the porosity of this porous combustion medium is 85%, and the combustion intensity can reach 0.10 kw / m 3 , NO x concentration ≤ 6 ppm, CO concentration ≤ 70 ppm, and the service life is ≥ 2000 times at the service temperature of 1200°C - 1400°C.

[0055] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for preparing a porous combustion medium body, characterized in that: The steps include: Step 1: construct a first basic cell body of a porous combustion medium body, and arrange the first basic cell body in multiple arrays along the length, width and height directions thereof to form a first layer geometric body of the porous combustion medium body; Step 2: constructing a second basic cell body of the porous combustion medium body on the first layer of geometric body, and arranging a plurality of the second basic cell bodies in the length, width and height directions thereof to form a second layer of geometric body of the porous combustion medium body; Among them, the first basic cell body and the second basic cell body at the junction of the first layer geometric body and the second layer geometric body are integrally formed and correspond to each other, and the inner hole ribs of the second basic cell body need to be coupled with the outermost hole ribs of the corresponding first basic cell body.

2. The method for preparing a porous combustion medium body according to claim 1, characterized in that: The first basic cell bodies are arrayed in n1, n2, and n3 directions along the length, width, and height thereof, respectively; the second basic cell bodies are arrayed in n4, n5, and n6 directions along the length, width, and height thereof, respectively; The parameters are as follows: H2=H-H1 Formula 4; Wherein, H is the height of the porous combustion medium body, H1 is the height of the first layer of geometric body, L is the length of the porous combustion medium body, W is the width of the porous combustion medium body in mm, H2 is the height of the first layer of geometric body, a1 is the side length of the first basic cell body, θ1 is the angle between the meridian plane of the first basic cell body and the Z axis, β1 is the angle between the meridian plane of the first basic cell body and the X axis, d1 is the pore rib of the first basic cell body, a2 is the side length of the second basic cell body, θ2 is the angle between the meridian plane of the second basic cell body and the Z axis, β2 is the angle between the meridian plane of the second basic cell body and the X axis, and d2 is the pore rib of the second basic cell body.

3. The method for preparing a porous combustion medium body according to claim 2, characterized in that: H is 20-75mm, H1 is 12-51mm, L is 51-306mm, W is 51-306mm, H2 is 8-24mm, β1 is 0-60°, θ1 is 0-60°, d1 is 0.6-3.4mm, a1 is 4-6mm, d2 is 0.3-1.5mm, and a2 is equal to a1, θ2 is equal to θ1, and β2 is equal to β1.

4. The method for preparing a porous combustion medium body according to claim 1, characterized in that: The porous combustion medium body is a cylinder or a polyhedron, and the cross section of the pores of the porous combustion medium body is a circular hole.

5. The method for preparing a porous combustion medium body according to claim 4, characterized in that: The diameter of the pores of the porous combustion medium body is 0.3-3.4 mm; the porosity of the porous combustion medium body is 72-99%.

6. The method for preparing a porous combustion medium body according to claim 1, characterized in that: The porous combustion medium body is prepared by printing with 3D printing slurry, coating with slurry, and then drying and high-temperature sintering.

7. The method for preparing a porous combustion medium body according to claim 6, characterized in that: The 3D printing slurry is one of photosensitive resin, polyurethane, polyvinyl alcohol, silicon carbide powder and carbon black.

8. The method for preparing a porous combustion medium body according to claim 6, characterized in that: The material of the slurry is at least one of aluminum oxide, zirconium oxide and silicon carbide.

9. A porous combustion medium body, characterized in that: The method is prepared according to any one of claims 1 to 8.

10. Use of the porous combustion medium body according to claim 9, characterized in that: For filling the liners of industrial burners.

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