CN114436666A - High-aluminum plastic material for sintering machine dust removal pipe and preparation method thereof - Google Patents
High-aluminum plastic material for sintering machine dust removal pipe and preparation method thereof Download PDFInfo
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- CN114436666A CN114436666A CN202210125734.7A CN202210125734A CN114436666A CN 114436666 A CN114436666 A CN 114436666A CN 202210125734 A CN202210125734 A CN 202210125734A CN 114436666 A CN114436666 A CN 114436666A
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- 238000005245 sintering Methods 0.000 title claims abstract description 35
- 239000004033 plastic Substances 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 title claims abstract description 30
- 239000000428 dust Substances 0.000 title claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 15
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 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 38
- 239000000843 powder Substances 0.000 claims abstract description 36
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 22
- 229910052599 brucite Inorganic materials 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 22
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 17
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 16
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 16
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 16
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 13
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 13
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 13
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 13
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 13
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 12
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- CDOUZKKFHVEKRI-UHFFFAOYSA-N 3-bromo-n-[(prop-2-enoylamino)methyl]propanamide Chemical group BrCCC(=O)NCNC(=O)C=C CDOUZKKFHVEKRI-UHFFFAOYSA-N 0.000 claims description 4
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 4
- 239000011819 refractory material Substances 0.000 abstract description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000975 co-precipitation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6306—Binders based on phosphoric acids or phosphates
- C04B35/6309—Aluminium phosphates
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention discloses a high-aluminum plastic material for a sintering machine dust removal pipe, which comprises the following raw materials in parts by mass: 55-70 parts of high-alumina bauxite, 5-10 parts of aluminum dihydrogen phosphate solution, 5-10 parts of phosphoric acid solution, 1-2 parts of brucite fiber, 0.5-1 part of magnesium aluminum hydrotalcite, 3-5 parts of magnesia, and SiO22-5 parts of micro powder and Al2O310-15 parts of micro powder. The invention also discloses a preparation method of the high-aluminum plastic material for the sintering machine dust removal pipe. The refractory plastic material has excellent high temperature stability and thermal shock resistance, and is suitable for being applied to refractory materials of dust removal pipes of sintering machines.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a high-aluminum plastic material for a sintering machine dust removal pipe and a preparation method thereof.
Background
The sintering machine is suitable for sintering operation of large-scale ferrous metallurgy sintering plants, is a main device in the air draft sintering process, is mainly suitable for sintering treatment of iron ore powder in large and medium-scale sintering plants, and partially eliminates harmful impurities such as sulfur, phosphorus and the like in the ore powder. The sintering machine needs to discharge a large amount of high-temperature flue gas in the operation process, and the flue gas needs to be dedusted by a pre-deduster and cooled by a cooler before entering the recycling and purifying processes such as adsorption, reaction and the like. Therefore, the dust removal pipe in the high-temperature flue gas dust removal device needs to be contacted with a large amount of high-temperature flue gas, and higher requirements are provided for the high-temperature resistance stability and the thermal shock resistance of the refractory plastic used by the dust removal pipe.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a high-aluminum plastic material for a sintering machine dust removal pipe and a preparation method thereof.
The invention provides a high-aluminum plastic material for a sintering machine dust removal pipe, which comprises the following raw materials in parts by mass: 55-70 parts of high-alumina bauxite, 5-10 parts of aluminum dihydrogen phosphate solution, 5-10 parts of phosphoric acid solution, 1-2 parts of nano brucite fiber, 0.5-1 part of magnesium aluminum hydrotalcite, 3-5 parts of magnesia, and SiO22-5 parts of micro powder and Al2O310-15 parts of micro powder.
Preferably, the nano brucite fiber is obtained by adding natural brucite fiber and a dispersing agent into water, stirring and dispersing for 0.5-1h under the condition of 200-600r/min, and drying.
Preferably, the mass ratio of the natural brucite fibers to the dispersing agent to the water is 1: (0.1-0.2): (15-20); preferably, the dispersant is dioctyl sodium sulfosuccinate.
Preferably, the magnesium-aluminum ratio of the magnesium-aluminum hydrotalcite is (3-1): 1.
the magnesium-aluminum hydrotalcite can be prepared by a common method in the field, such as a coprecipitation method, and the preparation method is not particularly limited in the present invention.
Preferably, the high bauxite is prepared from a high bauxite aggregate with the granularity of 1-3mm and a high bauxite powder with the granularity of less than 0.074mm according to the mass ratio of 1: (0.2-0.3).
Preferably, the content of magnesium oxide in the magnesite is more than or equal to 90 wt%, and the particle size of the magnesia is less than or equal to 0.088 mm.
Preferably, the SiO2SiO in micropowder2The content is more than or equal to 50 percent, and the grain diameter is 2-5 μm.
Preferably, the Al2O3Al in the fine powder2O3The content is more than or equal to 80 percent, and the grain diameter is 2-5 mu m.
Preferably, the mass concentration of the phosphoric acid solution is 45 wt%, and the specific gravity of the aluminum dihydrogen phosphate solution is 1.5-2g/cm3。
The preparation method of the high-aluminum plastic material for the dust removal pipe of the sintering machine comprises the following steps: firstly, high-alumina bauxite and SiO2Fine powder and Al2O3And uniformly mixing the micro powder, adding aluminum dihydrogen phosphate solution, phosphoric acid solution, nano brucite fiber, magnesium aluminum hydrotalcite and magnesia, and stirring to form a plastic state.
The invention has the following beneficial effects:
according to the invention, the natural brucite fiber is adopted to be compounded with the magnalium hydrotalcite and the magnesia to serve as an additive, so that magnesium ions can be introduced to promote phosphate of a binding agent, the cohesiveness of the binding agent is improved, and a uniform cordierite phase is generated, so that the effect of reinforcing the plastic material is achieved. The refractory plastic material has excellent high temperature stability and thermal shock resistance, and is suitable for being applied to refractory materials of dust removal pipes of sintering machines.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The high-aluminum plastic material for the sintering machine dust removal pipe comprises the following raw materials in parts by mass: 65 portions of high bauxite with the specific gravity of 1.5g/cm38 parts of aluminum dihydrogen phosphate solution, 6 parts of phosphoric acid solution with the mass concentration of 45 wt%, 1.5 parts of nano brucite fiber, 0.8 part of magnesium aluminum hydrotalcite, 4 parts of magnesia, and SiO23 parts of micro powder and Al2O312 parts of micro powder.
The raw materials are as follows:
the preparation method of the nano brucite fiber comprises the following steps: adding natural brucite fibers and dioctyl sodium sulfosuccinate into water, stirring and dispersing for 40min under the condition of 500r/min, and drying to obtain the natural brucite fibers, dioctyl sodium sulfosuccinate and water, wherein the mass ratio of the natural brucite fibers to the water is 1: 0.15: 20.
the preparation method of the magnesium-aluminum hydrotalcite is a coprecipitation method, and comprises the following steps: adding 0.3mol of MgCl2·6H2O and 0.2mol AlCl3·6H2And adding O into 1L of water, then adding ammonia water to carry out coprecipitation reaction, controlling the pH at the end point of the reaction to be 8.5, then aging at 50 ℃ for 12h, centrifuging, washing the obtained precipitate, and drying to obtain the catalyst.
The high-alumina bauxite is prepared from high-alumina aggregate with the granularity of 1-3mm and high-alumina bauxite powder with the granularity of less than 0.074mm according to the mass ratio of 1: 0.25; the content of magnesium oxide in the magnesia is more than or equal to 90 wt%, and the grain diameter is less than or equal to 0.088 mm; SiO 22SiO in micropowder2The content is more than or equal to 50 percent, and the grain diameter is 2-5 mu m; al (Al)2O3Al in the fine powder2O3The content is more than or equal to 80 percent, and the grain diameter is 2-5 mu m.
The preparation method of the high-aluminum plastic material for the dust removal pipe of the sintering machine comprises the following steps: firstly, high-alumina bauxite and SiO2Fine powder and Al2O3And uniformly mixing the micro powder, adding aluminum dihydrogen phosphate solution, phosphoric acid solution, nano brucite fiber, magnesium aluminum hydrotalcite and magnesia, and stirring to form a plastic state.
Example 2
The high-aluminum plastic material for the sintering machine dust removal pipe comprises the following raw materials in parts by mass: 55 parts of bauxite with the specific gravity of 1.5gcm35 parts of aluminum dihydrogen phosphate solution, 5 parts of phosphoric acid solution with the mass concentration of 45 wt%, 1 part of nano brucite fiber, 0.5 part of magnesium aluminum hydrotalcite, 3 parts of magnesia, and SiO22 parts of micro powder and Al2O310 parts of micro powder.
The raw materials are as follows:
the preparation method of the nano brucite fiber and the magnesium aluminum hydrotalcite is the same as that of the example 1.
The high-alumina bauxite is prepared from high-alumina aggregate with the granularity of 1-3mm and high-alumina bauxite powder with the granularity of less than 0.074mm according to the mass ratio of 1: 0.2; the content of magnesium oxide in the magnesia is more than or equal to 90 wt%, and the grain diameter is less than or equal to 0.088 mm; SiO 22SiO in micropowder2The content is more than or equal to 50 percent, and the grain diameter is 2-5 mu m; al (Al)2O3Al in the fine powder2O3The content is more than or equal to 80 percent, and the grain diameter is 2-5 mu m.
The preparation method of the high-aluminum plastic material for the dust removing pipe of the sintering machine is the same as that of the example 1.
Example 3
The high-aluminum plastic material for the sintering machine dust removal pipe comprises the following raw materials in parts by mass: 70 parts of high bauxite with the specific gravity of 2g/cm310 parts of aluminum dihydrogen phosphate solution, 10 parts of phosphoric acid solution with the mass concentration of 45 wt%, 2 parts of nano brucite fiber, 1 part of magnesium aluminum hydrotalcite, 5 parts of magnesia and SiO25 parts of micro powder and Al2O315 parts of micro powder.
The raw materials are as follows:
the preparation method of the nano brucite fiber and the magnesium aluminum hydrotalcite is the same as that of the example 1.
The high-alumina bauxite is prepared from high-alumina aggregate with the granularity of 1-3mm and high-alumina bauxite powder with the granularity of less than 0.074mm according to the mass ratio of 1: (0.2-0.3, the content of magnesium oxide in the magnesite is more than or equal to 90 wt%, the grain diameter is less than or equal to 0.088mm, SiO2SiO in micropowder2The content is more than or equal to 50 percent, and the grain diameter is 2-5 mu m; al (Al)2O3Al in the fine powder2O3The content is more than or equal to 80 percent, and the grain diameter is 2-5 mu m.
The preparation method of the high-aluminum plastic material for the dust removing pipe of the sintering machine is the same as that of the example 1.
Comparative example 1
The high-aluminum plastic material for the sintering machine dust removal pipe comprises the following raw materials in parts by mass: 65 portions of high bauxite with the specific gravity of 1.5g/cm38 parts of aluminum dihydrogen phosphate solution, 6 parts of phosphoric acid solution with the mass concentration of 45 wt%, 6.3 parts of magnesia and SiO23 parts of micro powder and Al2O312 parts of micro powder.
The raw materials are as follows:
the high-alumina bauxite is prepared from high-alumina aggregate with the granularity of 1-3mm and high-alumina bauxite powder with the granularity of less than 0.074mm according to the mass ratio of 1: 0.25; the content of magnesium oxide in the magnesia is more than or equal to 90 wt%, and the grain diameter is less than or equal to 0.088 mm; SiO 22SiO in micropowder2The content is more than or equal to 50 percent, and the grain diameter is 2-5 mu m; al (aluminum)2O3Al in the fine powder2O3The content is more than or equal to 80 percent, and the grain diameter is 2-5 mu m.
The preparation method of the high-aluminum plastic material for the dust removal pipe of the sintering machine comprises the following steps: firstly, high-alumina bauxite and SiO2Fine powder and Al2O3And uniformly mixing the micro powder, adding aluminum dihydrogen phosphate solution, phosphoric acid solution and magnesia, and stirring to form a plastic state.
Test examples
The moldable material of example 1 and comparative example 1 was formed into test specimens, and the properties thereof were measured under the conditions and results shown in Table 1.
The method for testing the thermal shock stability comprises the following steps: heating the sample to 1100 ℃, preserving heat for 20min, cooling the sample to room temperature by using fast flowing water for 3min, circularly heating and cooling until the sample cracks, and recording the times of rapid cooling and rapid heating.
TABLE 1
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The high-aluminum plastic material for the sintering machine dust removal pipe is characterized by comprising the following raw materials in parts by mass: 55-70 parts of high-alumina bauxite, 5-10 parts of aluminum dihydrogen phosphate solution, 5-10 parts of phosphoric acid solution, 1-2 parts of nano brucite fiber, 0.5-1 part of magnesium aluminum hydrotalcite, 3-5 parts of magnesia, and SiO22-5 parts of micro powder and Al2O310-15 parts of micro powder.
2. The high-aluminum plastic material for the dust removal pipe of the sintering machine as claimed in claim 1, wherein the nano brucite fiber is obtained by adding natural brucite fiber and a dispersing agent into water, stirring and dispersing for 0.5-1h under the condition of 200-600r/min, and drying.
3. The high-aluminum plastic material for the dust removal pipe of the sintering machine as claimed in claim 2, wherein the mass ratio of the natural brucite fibers, the dispersant and the water is 1: (0.1-0.2): (15-20); preferably, the dispersant is dioctyl sodium sulfosuccinate.
4. The high-aluminum plastic material for the dust removing pipe of the sintering machine as claimed in claim 1, wherein the magnesium-aluminum hydrotalcite has a magnesium-aluminum ratio of (3-1): 1.
5. the plastic high-alumina material for dust-removing tubes of sintering machines as claimed in claim 1, wherein the high-alumina is prepared from high-alumina aggregate with a particle size of 1-3mm and high-alumina powder with a particle size of less than 0.074mm, by mass ratio of 1: (0.2-0.3).
6. The high-aluminum plastic material for the dust removal pipe of the sintering machine as claimed in claim 1, wherein the magnesia content in the magnesite is not less than 90 wt%, and the particle size thereof is not more than 0.088 mm.
7. The plastic high-alumina material for dust-removing tubes of sintering machines as claimed in claim 1, wherein said SiO is selected from the group consisting of2SiO in micropowder2The content is more than or equal to 50 percent, and the grain diameter is 2-5 mu m.
8. The plastic high-alumina material for dust-removing tubes of sintering machines as claimed in claim 1, wherein said Al is selected from the group consisting of2O3Al in the fine powder2O3The content is more than or equal to 80 percent, and the grain diameter is 2-5 mu m.
9. The high-aluminum plastic material for dust-removing tubes of sintering machines as claimed in claim 1, wherein the mass concentration of the phosphoric acid solution is 45 wt%, and the specific gravity of the aluminum dihydrogen phosphate solution is 1.5-2g/cm3。
10. A method for preparing the high-alumina plastic material for the dust removing pipe of the sintering machine according to any one of claims 1 to 9, which comprises the following steps: firstly, high-alumina bauxite and SiO2Fine powder and Al2O3And uniformly mixing the micro powder, adding aluminum dihydrogen phosphate solution, phosphoric acid solution, nano brucite fiber, magnesium aluminum hydrotalcite and magnesia, and stirring to form a plastic state.
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