CN117986006A - Composite refractory material for vacuum induction furnace lining and preparation method thereof - Google Patents
Composite refractory material for vacuum induction furnace lining and preparation method thereof Download PDFInfo
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- CN117986006A CN117986006A CN202311833416.7A CN202311833416A CN117986006A CN 117986006 A CN117986006 A CN 117986006A CN 202311833416 A CN202311833416 A CN 202311833416A CN 117986006 A CN117986006 A CN 117986006A
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- parts
- composite refractory
- corundum
- induction furnace
- furnace lining
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- 239000011819 refractory material Substances 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 230000006698 induction Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 36
- 239000010431 corundum Substances 0.000 claims abstract description 36
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 239000006004 Quartz sand Substances 0.000 claims abstract description 7
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 6
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 5
- 239000011575 calcium Substances 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims abstract description 5
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 5
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000011363 dried mixture Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000007767 bonding agent Substances 0.000 description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to a composite refractory material for a vacuum induction furnace lining and a preparation method thereof, wherein the composite refractory material comprises the following raw materials in parts by weight: 50-80 parts of fused white corundum, 20-45 parts of fused magnesia, 20-25 parts of synthetic magnesia-calcium sand, 15-25 parts of alumina micropowder, 10-15 parts of quartz sand, 5-10 parts of bauxite, 4-8 parts of silicon carbide, 3-7 parts of binding agent and 0.5-2 parts of additive; the electro-fused white corundum comprises spherical corundum and plate-shaped corundum, wherein the mass ratio of the spherical corundum to the plate-shaped corundum is 1: (1-3). The composite refractory material can improve the earthquake resistance and corrosion resistance of the lining, thereby prolonging the service life of the lining.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a composite refractory material for a vacuum induction furnace lining and a preparation method thereof.
Background
With the continuous development of modern industry, the blast furnace technology is also advancing, and one of the most important parameters is the service life of the blast furnace. In addition to this, the trend towards rationalization and further optimization of the operating parameters due to the progressive trend of the structural parameters of the blast furnace body, advances in the materials and construction techniques of the blast furnace lining are also important components that cannot be neglected.
At present, the vacuum induction furnace lining materials used at home and abroad mainly comprise corundum furnace lining materials, magnesia furnace lining, quartz sand furnace lining, bauxite furnace lining and the like. The use effect is not ideal all the time, the service life is short, and the crucible is eroded.
Therefore, there is a need for a composite refractory material for vacuum induction furnace liners that improves the corrosion resistance, shock resistance, and service life of the liner.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention solves the technical problem of providing the composite refractory material for the vacuum induction furnace lining and the preparation method thereof, and the composite refractory material can improve the anti-seismic performance and the corrosion resistance of the lining, thereby prolonging the service life of the lining.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the composite refractory material for the vacuum induction furnace lining comprises the following raw materials in parts by weight:
50-80 parts of fused white corundum, 20-45 parts of fused magnesia, 20-25 parts of synthetic magnesia-calcium sand, 15-25 parts of alumina micropowder, 10-15 parts of quartz sand, 5-10 parts of bauxite, 4-8 parts of silicon carbide, 3-7 parts of binding agent and 0.5-2 parts of additive; the electro-fused white corundum comprises spherical corundum and plate-shaped corundum, wherein the mass ratio of the spherical corundum to the plate-shaped corundum is 1: (1-3).
The content of magnesium oxide in the fused magnesia is more than 98 percent.
The granularity of the alumina micropowder is 325 meshes.
The granularity of the silicon carbide powder is 200 meshes.
The bonding agent is one or two of boric acid and dye-grade chromium oxide green.
The additive is clay.
A preparation method of a composite refractory material for a vacuum induction furnace lining comprises the following steps:
1) The used raw materials are detected according to the required standard, and the qualified raw materials can be used after being qualified;
2) Weighing various materials according to the proportion in the formula, and putting the materials into a forced stirrer for mixing for 20-40 min;
3) Drying the obtained mixture fully, and performing dry pressing on the dried mixture on a press under the pressure of 98-120MPa to obtain a block;
4) And sintering the green sheet at high temperature to obtain the composite refractory material.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention adopts two fused white corundum with different shapes, namely spherical corundum and plate-shaped corundum, wherein the spherical corundum has low sintering activity and slowly reacts with quartz sand to generate a very small amount of mullite phase with large size, thereby endowing a product with good fracture resistance and excellent high-temperature service performance, and the plate-shaped corundum has relatively high reactivity and can generate more small-size grains with uniform distribution, thereby providing the product with higher porosity, low thermal expansion coefficient and excellent thermal shock resistance.
(2) The invention can improve the oxidation resistance of the refractory material by adding the silicon carbide powder and the alumina micropowder, prevent the refractory material from cracking or expanding, and enhance the normal pressure compressive strength, the high temperature flexural strength and the corrosion resistance of the refractory material.
(3) The invention has the advantages that the addition of the alumina and the silicon carbide material can enhance the wear resistance, the high load softening temperature and strength, the thermal shock resistance, the alkali gas corrosion resistance and the like of the refractory material, and is beneficial to prolonging the service life of the refractory material.
Detailed Description
Example 1
The composite refractory material for the vacuum induction furnace lining comprises the following raw materials in parts by weight:
50 parts of fused white corundum, 25 parts of fused magnesia, 20 parts of synthetic magnesia-calcium sand, 15 parts of alumina micropowder, 10 parts of quartz sand, 5 parts of bauxite, 4 parts of silicon carbide, 3 parts of a bonding agent and 1 part of an additive; the electro-fused white corundum comprises spherical corundum and plate-shaped corundum, wherein the mass ratio of the spherical corundum to the plate-shaped corundum is 1:2.
The content of magnesium oxide in the fused magnesia is more than 98 percent.
The granularity of the alumina micropowder is 325 meshes.
The granularity of the silicon carbide powder is 200 meshes.
The bonding agent is one or two of boric acid and dye-grade chromium oxide green.
The additive is clay.
The preparation method of the composite refractory material for the vacuum induction furnace lining comprises the following steps:
1) The used raw materials are detected according to the required standard, and the qualified raw materials can be used after being qualified;
2) Weighing various materials according to the proportion in the formula, and putting the materials into a forced stirrer for mixing for 20-40 min;
3) Drying the obtained mixture fully, and performing dry pressing on the dried mixture on a press under the pressure of 98-120MPa to obtain a block;
4) And sintering the green sheet at high temperature to obtain the composite refractory material.
Example 2
The composite refractory material for the vacuum induction furnace lining comprises the following raw materials in parts by weight:
55 parts of fused white corundum, 30 parts of fused magnesia, 25 parts of synthetic magnesia-calcium sand, 20 parts of alumina micropowder, 15 parts of quartz sand, 8 parts of bauxite, 5 parts of silicon carbide, 3 parts of a bonding agent and 1 part of an additive; the electro-fused white corundum comprises spherical corundum and plate-shaped corundum, wherein the mass ratio of the spherical corundum to the plate-shaped corundum is 1:2.
The content of magnesium oxide in the fused magnesia is more than 98 percent.
The granularity of the alumina micropowder is 325 meshes.
The granularity of the silicon carbide powder is 200 meshes.
The bonding agent is one or two of boric acid and dye-grade chromium oxide green.
The additive is clay.
The preparation method of the composite refractory material for the vacuum induction furnace lining comprises the following steps:
1) The used raw materials are detected according to the required standard, and the qualified raw materials can be used after being qualified;
2) Weighing various materials according to the proportion in the formula, and putting the materials into a forced stirrer for mixing for 20-40 min;
3) Drying the obtained mixture fully, and performing dry pressing on the dried mixture on a press under the pressure of 98-120MPa to obtain a block;
4) And sintering the green sheet at high temperature to obtain the composite refractory material.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention. In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (7)
1. The composite refractory material for the vacuum induction furnace lining is characterized by comprising the following raw materials in parts by weight: 50-80 parts of fused white corundum, 20-45 parts of fused magnesia, 20-25 parts of synthetic magnesia-calcium sand, 15-25 parts of alumina micropowder, 10-15 parts of quartz sand, 5-10 parts of bauxite, 4-8 parts of silicon carbide, 3-7 parts of binding agent and 0.5-2 parts of additive; the electro-fused white corundum comprises spherical corundum and plate-shaped corundum, wherein the mass ratio of the spherical corundum to the plate-shaped corundum is 1: (1-3).
2. The composite refractory for a vacuum induction furnace lining according to claim 1, wherein the magnesia content in the fused magnesia is > 98%.
3. The composite refractory for a vacuum induction furnace lining according to claim 1, wherein the alumina fine powder has a particle size of 325 mesh.
4. The composite refractory for a vacuum induction furnace lining according to claim 1, wherein the silicon carbide powder has a grain size of 200 mesh.
5. The composite refractory material for vacuum induction furnace lining according to claim 1, wherein the binder is one or a combination of boric acid and dye-grade chromium oxide green.
6. A composite refractory for a vacuum induction furnace lining according to claim 1, wherein the additive is clay.
7. A method for preparing a composite refractory material for a vacuum induction furnace lining according to any one of claims 1 to 6, comprising the steps of:
1) The used raw materials are detected according to the required standard, and the qualified raw materials can be used after being qualified;
2) Weighing various materials according to the proportion in the formula, and putting the materials into a forced stirrer for mixing for 20-40 min;
3) Drying the obtained mixture fully, and performing dry pressing on the dried mixture on a press under the pressure of 98-120MPa to obtain a block;
4) And sintering the green sheet at high temperature to obtain the composite refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311833416.7A CN117986006A (en) | 2023-12-28 | 2023-12-28 | Composite refractory material for vacuum induction furnace lining and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311833416.7A CN117986006A (en) | 2023-12-28 | 2023-12-28 | Composite refractory material for vacuum induction furnace lining and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117986006A true CN117986006A (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311833416.7A Pending CN117986006A (en) | 2023-12-28 | 2023-12-28 | Composite refractory material for vacuum induction furnace lining and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117986006A (en) |
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2023
- 2023-12-28 CN CN202311833416.7A patent/CN117986006A/en active Pending
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