CN111592333A - Large special-shaped refractory material with rapid solidification, high thermal shock and low creep and preparation method thereof - Google Patents
Large special-shaped refractory material with rapid solidification, high thermal shock and low creep and preparation method thereof Download PDFInfo
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- 239000011819 refractory material Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 230000035939 shock Effects 0.000 title abstract description 9
- 238000007712 rapid solidification Methods 0.000 title description 2
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 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
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 8
- 239000011707 mineral Substances 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011362 coarse particle Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000010419 fine particle Substances 0.000 claims abstract description 3
- 229910052849 andalusite Inorganic materials 0.000 claims description 15
- 229910052593 corundum Inorganic materials 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000010431 corundum Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 5
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 5
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 5
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 5
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims description 4
- 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 claims description 4
- 229910052850 kyanite Inorganic materials 0.000 claims description 4
- 239000010443 kyanite Substances 0.000 claims description 4
- 229910052863 mullite Inorganic materials 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052851 sillimanite Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 13
- 239000000654 additive Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 7
- 239000004575 stone Substances 0.000 description 7
- 229910021487 silica fume Inorganic materials 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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Abstract
The invention discloses a rapid-setting low-creep large-piece special-shaped refractory material and a preparation method thereof. The refractory material is prepared from the following raw materials in parts by mass: the ratio of the coarse particles to the fine particles is 65:35 to 72: 28; the coarse particles are particles of aluminum-silicon minerals with the particle size of less than 10 mm; the fine powder is powder particles with the particle size of less than 0.1mm, and comprises aluminum-silicon mineral powder, alumina micro powder, micro silicon powder and quick-setting cement. The material prepared by the method can meet the requirements of high production efficiency, strength and high-temperature volume stability; and the thermal shock resistance of the material is greatly improved, other additives for improving the thermal shock resistance are omitted, and the raw material cost is reduced.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and relates to a rapid-setting, high-thermal-shock and low-creep large-piece special-shaped refractory material and a preparation method thereof.
Background
At present, the production of refractory materials has two types of fixed type and unshaped type. In the case of emergency maintenance of the kiln or the requirement of the kiln construction at the beginning, a large number of large special-shaped products are required. At this time, if the conventional production process is adopted, the production efficiency is difficult to satisfy the production and use aging. In addition, in other accidents such as operating temperature fluctuation or emergency shutdown required for environmental protection, the temperature fluctuation of the kiln may be large. Therefore, in order to meet the requirement of prolonging the service life of the kiln, higher requirements are provided for the supply period, the thermal shock resistance and the creep resistance of the material.
In order to solve the problems, the invention provides a large-piece special-shaped refractory material product capable of being prepared in large scale and a preparation method thereof, and the refractory material has the properties of quick setting, high thermal shock, low creep deformation and the like.
Disclosure of Invention
The invention adopts a preparation method of the castable, and the aluminum-silicon castable is generally added with silica fume to improve the fluidity, and the adding amount is basically more than 4%. The fine powder generally has a particle size of 5 μm or less, and because of its small particle size, the effect of dispersing in the material is remarkable even when the amount of the fine powder added is small. The main component of the micro silicon powder is SiO2However, the quick-setting cement component also contains Al2O3And CaO. SiO 22、Al2O3The three phases of the high-temperature-resistant titanium alloy and CaO are combined together to easily generate a low-temperature liquid phase, and the higher the content of the three phases is, the larger the generated liquid phase amount is, so that the high-temperature creep property is poorer. The invention thus provides a process for the preparation of: a small amount of silicon micro powder and cement are adopted, so that the carrying strength can be met, and the requirements on strength and high-temperature volume stability are met; and because the preparation method can add more than 70 percent of aggregate, the thermal shock resistance of the material is greatly improved, other additives for improving the thermal shock resistance are omitted, and the cost of the raw materials is reduced. Meanwhile, aiming at large special-shaped products with large quantity, quick-setting cement, warm water or raw materials are mixed, cast, molded and maintained in a heating state, and the curing and demolding time can be reduced by more than half compared with that of common cement.
Definition of
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The materials used herein are general materials available on the market.
In the present invention, particles having a wide particle size range are divided into several grades having a narrow particle size range, and these grades are referred to as size fractions. For example, the andalusite particles with the size fraction of 3-1 mm show that the maximum particle size of andalusite in the size range is 3mm, and the minimum particle size is 1 mm.
In a first aspect, the invention provides a refractory material, which is prepared from the following raw materials in parts by mass: the ratio of the coarse particles to the fine particles is 65:35 to 72: 28; the coarse particles are particles of aluminum-silicon minerals with the particle size of less than 10 mm; the fine powder is powder particles with the particle size of less than 0.1mm, and comprises aluminum-silicon mineral powder, alumina micro powder, micro silicon powder and quick-setting cement.
Further, the raw materials of the refractory material also comprise a dispersing agent, and the dispersing agent comprises one or two of the following substances: sodium tripolyphosphate and sodium hexametaphosphate.
Preferably, the alumino-silica based minerals comprise one or more of tabular corundum, white corundum, brown corundum, fused mullite, sintered mullite, andalusite, sillimanite, kyanite.
Further, the fine powder comprises the following components in parts by weight: 4-10 parts of activated alumina micro powder with the particle size of less than 5 mu m, 1-2 parts of micro silicon powder and 2-4 parts of quick-setting cement.
Furthermore, the mass portion of the dispersing agent in the refractory material is 0.15-0.8.
Preferably, the coarse particles have the following specifications: andalusite of 3-1 mm, andalusite of 1-0 mm, flint of 3-1 mm, flint clay of 3-5 mm and tabular corundum of 3-5 mm, wherein the specifications refer to particle size fractions.
In a second aspect, the present invention provides a method for preparing the refractory material: mixing the raw materials, adding 6-8 parts of warm water with the temperature of more than 40 ℃, mixing, casting and molding, curing for 4-12 hours, hardening, demolding, naturally standing for 12-24 hours, and then heating at 200 ℃ for 24-72 hours.
The other preparation method of the refractory material provided by the invention comprises the following steps: heating the raw materials to above 50 ℃, adding 6-8 parts of water at room temperature, mixing, casting and molding, curing for 4-12 hours, curing, demoulding, naturally standing for 12-24 hours, and then heating at 200 ℃ for 24-72 hours.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples.
It should be noted that the present invention is not limited to the following examples. The method is a conventional method unless otherwise specified. The starting materials are commercially available from the open literature unless otherwise specified.
The performance test criteria in each example are shown in table 1 below:
TABLE 1 Performance test standards
| Test items | Test standard |
| Al2O3Content (wt.) | ISO12677 |
| Apparent porosity | ISO5017 |
| Bulk density | ISO5017 |
| Compressive strength at room temperature | ISO10059 |
| Creep rate | ISO3187 |
| Thermal shock resistance stability | DIN51068 |
In each example, the mass of the particles and the fine powder is 100% in total; the mass fractions of the remaining components, such as dispersant, water, are percentages relative to the sum of the mass of the granules and the fine powder.
Example 1
In this example, the raw materials and their contents are shown in table 2 below:
table 2 example 1 raw materials and compounding ratio table
| Name of Material | Specification of | Ratio (%) |
| Flint clay | 3-1(mm) | 55 |
| Andalusite stone | 1-0(mm) | 16 |
| Silica fume | Less than 5 μm | 4 |
| Kyanite | 150 mesh | 10 |
| Andalusite stone | 0.088(mm) | 7 |
| Alumina micropowder | Less than 5 μm | 4 |
| Quick-setting cement | 4 | |
| Sodium tripolyphosphate | 0.07 | |
| Sodium hexametaphosphate | 0.08 |
The raw materials are mixed, added with water of 5-7% at 40 ℃, stirred for 4 minutes, poured into a mold, maintained at room temperature of 25 ℃ for 2 hours, demolded, naturally maintained for 24 hours, heated to 200 ℃ at a heating rate of 25 ℃ per hour, and kept warm for 24 hours to obtain the refractory material.
The properties of the resulting refractory are shown in table 3 below:
table 3 properties of the material of example 1
Example 2
In this example, the raw materials and their contents are shown in table 4 below:
table 4 example 2 raw materials and compounding ratio table
| Name of Material | Specification of | Ratio (%) |
| Andalusite stone | 3-1(mm) | 55 |
| Andalusite stone | 1-0(mm) | 16 |
| Silica fume | Less than 5 μm | 2 |
| Kyanite | 150 mesh | 9 |
| Andalusite stone | 0.088(mm) | 8 |
| Alumina micropowder | Less than 5 μm | 6 |
| Quick-setting cement | 4 | |
| Sodium tripolyphosphate | 0.07 | |
| Sodium hexametaphosphate | 0.08 |
The raw materials are mixed, added with water of 5-7% at 40 ℃, stirred for 4 minutes, poured into a mold, maintained at room temperature of 25 ℃ for 2 hours, demolded, naturally maintained for 24 hours, heated to 200 ℃ at a heating rate of 25 ℃ per hour, and kept warm for 24 hours to obtain the refractory material.
The properties of the resulting refractory are shown in table 5 below:
table 5 properties of the material of example 2
Example 3
In this example, the raw materials and their contents are shown in table 6 below:
table 6 example 3 raw materials and compounding ratio table
| Name of Material | Specification of | Ratio (%) |
| Plate-like corundum | 5-3(mm) | 15 |
| Andalusite stone | 3-1(mm) | 40 |
| Sillimanite | 0.2mm or less | 20 |
| Silica fume | Less than 5 μm | 2 |
| Andalusite stone | 0.088(mm) | 11 |
| Alumina micropowder | Less than 5 μm | 8 |
| Quick-setting cement | 4 | |
| Water (W) | 5-7 | |
| Sodium tripolyphosphate | 0.07 | |
| Sodium hexametaphosphate | 0.08 |
The raw materials are mixed, added with water of 5-7% at 40 ℃, stirred for 4 minutes, poured into a mold, maintained at room temperature of 25 ℃ for 2 hours, demolded, naturally maintained for 24 hours, heated to 200 ℃ at a heating rate of 25 ℃ per hour, and kept warm for 24 hours to obtain the refractory material.
The properties of the resulting refractory are shown in table 7 below:
table 7 properties of the material of example 3
Claims (8)
1. The refractory material is characterized by being prepared from the following raw materials in parts by mass: the ratio of the coarse particles to the fine particles is 65:35 to 72: 28; the coarse particles are particles of aluminum-silicon minerals with the particle size of less than 10 mm; the fine powder is a powdery substance with the particle size of less than 0.1mm and comprises aluminum-silicon mineral powder, alumina micro powder, micro silicon powder and quick-setting cement.
2. The refractory of claim 1, wherein the feedstock further comprises a dispersant comprising one or more of the following: sodium tripolyphosphate and sodium hexametaphosphate.
3. The refractory of claim 2, wherein the alumino-silica based minerals comprise one or more of tabular corundum, white corundum, brown corundum, fused mullite, sintered mullite, andalusite, sillimanite, kyanite.
4. The refractory material according to claim 3, wherein the fine powder comprises the following components in parts by mass: 4-10 parts of activated alumina micro powder with the particle size of less than 5 mu m, 1-2 parts of micro silicon powder and 2-4 parts of quick-setting cement.
5. The refractory according to claim 4, wherein the dispersant is present in an amount of 0.2 to 0.8 parts by mass.
6. The refractory of claim 5, wherein the coarse grains are of the following specification: andalusite of 3-1 mm, andalusite of 1-0 mm, flint of 3-1 mm, flint clay of 5-3 mm and tabular corundum of 5-3 mm, wherein the specifications refer to particle size fractions.
7. A method for producing the refractory according to any one of claims 1 to 6, wherein the raw materials are mixed, 6 to 8 parts of warm water at a temperature of 40 ℃ or higher is added, the mixture is cast and molded, cured for 2 to 4 hours, cured and demolded, naturally left for 12 to 24 hours, and then heated at 200 ℃ for 24 to 72 hours.
8. A method for preparing the refractory according to any one of claims 1 to 6, wherein the raw material is heated to 50 ℃ or higher, 6 to 8 parts of water at room temperature are added, mixed and cast, cured for 2 to 4 hours, cured, demoulded, naturally left for 12 to 24 hours, and then heated at 200 ℃ for 24 to 72 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114057500A (en) * | 2021-12-24 | 2022-02-18 | 长兴兴鹰新型耐火建材有限公司 | Quick-drying type anti-explosion wear-resistant castable special for grate cooler and production method thereof |
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| JP2000219575A (en) * | 1998-11-27 | 2000-08-08 | Toshiba Ceramics Co Ltd | Castable refractory |
| CN102276263A (en) * | 2011-04-28 | 2011-12-14 | 河南鑫诚耐火材料股份有限公司 | Manufacturing method of seal cover for operation observation aperture on carbon calciner fire wall |
| CN104326758A (en) * | 2014-10-21 | 2015-02-04 | 郑州安耐克实业有限公司 | High-temperature resistant thermal shock resistant pipeline used in iron-making hot blast heater and preparation method of high-temperature resistant thermal shock resistant pipeline |
| CN104355630A (en) * | 2014-10-21 | 2015-02-18 | 郑州安耐克实业有限公司 | Wear-resistant and thermal shock-resistant lining for air supply branch pipe of iron-making blast furnace and preparation method thereof |
| CN110668830A (en) * | 2019-09-25 | 2020-01-10 | 上海利尔耐火材料有限公司 | Preparation method of novel mullite-combined light castable |
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- 2020-05-25 CN CN202010450856.4A patent/CN111592333A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000219575A (en) * | 1998-11-27 | 2000-08-08 | Toshiba Ceramics Co Ltd | Castable refractory |
| CN102276263A (en) * | 2011-04-28 | 2011-12-14 | 河南鑫诚耐火材料股份有限公司 | Manufacturing method of seal cover for operation observation aperture on carbon calciner fire wall |
| CN104326758A (en) * | 2014-10-21 | 2015-02-04 | 郑州安耐克实业有限公司 | High-temperature resistant thermal shock resistant pipeline used in iron-making hot blast heater and preparation method of high-temperature resistant thermal shock resistant pipeline |
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| CN110668830A (en) * | 2019-09-25 | 2020-01-10 | 上海利尔耐火材料有限公司 | Preparation method of novel mullite-combined light castable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114057500A (en) * | 2021-12-24 | 2022-02-18 | 长兴兴鹰新型耐火建材有限公司 | Quick-drying type anti-explosion wear-resistant castable special for grate cooler and production method thereof |
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