CN116178031B - Insulating layer castable for aluminum ash rotary kiln and preparation method thereof - Google Patents
Insulating layer castable for aluminum ash rotary kiln and preparation method thereof Download PDFInfo
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- CN116178031B CN116178031B CN202211685836.0A CN202211685836A CN116178031B CN 116178031 B CN116178031 B CN 116178031B CN 202211685836 A CN202211685836 A CN 202211685836A CN 116178031 B CN116178031 B CN 116178031B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000004927 clay Substances 0.000 claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 8
- 230000000996 additive effect Effects 0.000 claims abstract description 8
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 8
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 8
- 238000007580 dry-mixing Methods 0.000 claims description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 239000002893 slag Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate or hypophosphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses an insulating layer castable for an aluminum ash rotary kiln and a preparation method thereof, wherein the insulating layer castable comprises the following raw materials in percentage by mass: 36-73% of flint clay, 5-20% of bauxite, 1-10% of silica powder, 20-30% of 725 cement and 2-18% of Guangxi white mud; and the additive sodium tripolyphosphate accounts for 0.1 to 0.4 percent of the total mass of the raw materials. The heat-insulating layer castable has the advantages of low volume density, low heat conductivity and high refractoriness, and can obviously improve heat-insulating performance and reduce heat dissipation when used at the heat-insulating layer part of the aluminum ash rotary kiln, thereby bringing considerable economic benefit.
Description
Technical Field
The invention relates to the field of refractory materials, in particular to an insulating layer castable for an aluminum ash rotary kiln and a preparation method thereof.
Background
The aluminum ash is scum generated when molten aluminum is smelted in a casting furnace, is industrial waste which directly or indirectly damages the environment, and is a renewable resource which can be comprehensively utilized. The aluminum slag is treated by ash treatment complete equipment such as a rotary kiln, a cold ash cylinder, an ash sieving machine and the like, so that the burning loss of aluminum in the aluminum slag can be reduced, the aluminum in the slag can be recovered, and waste is changed into valuable. The rotary kiln has high efficiency and high mechanization degree, and is a common method for treating aluminum ash for large enterprises.
The traditional insulating layer castable for the aluminum ash rotary kiln has the characteristics of low porosity, high density and high heat conductivity, so that the shell of the rotary kiln is higher in temperature, quicker in heat dissipation and increased in energy consumption cost in use, and is contrary to the current energy conservation and consumption reduction. The aluminum ash rotary kiln heat insulation layer has the characteristics of moderate porosity, low volume density, low heat conductivity and high refractoriness, and can obviously improve heat insulation performance and reduce heat dissipation when being used at the heat insulation layer part of the aluminum ash rotary kiln, thereby bringing considerable economic benefit.
Disclosure of Invention
The invention aims to solve the defects of the technical problems, and provides an insulating layer castable for an aluminum ash rotary kiln and a preparation method thereof.
In order to solve the defects of the technical problems, the invention adopts the following technical scheme:
The invention discloses an insulating layer castable for an aluminum ash rotary kiln, which is characterized by comprising the following raw materials in parts by mass: 36-73% of flint clay, 5-20% of bauxite, 1-10% of silica powder, 20-30% of 725 cement and 2-18% of Guangxi white mud; sodium tripolyphosphate as an additive accounting for 0.1-0.4% of the total mass of the raw materials;
The flint clay contains more than or equal to 45% of aluminum oxide by weight, less than or equal to 1.2% of ferric oxide by weight, the volume density of the flint clay is more than or equal to 2.5g/cm 3, and the granularity of the flint clay is respectively 5-3mm, 3-1mm, 1-0mm and more than or equal to 200 meshes;
the alumina contains more than or equal to 60% of aluminum oxide by mass, and the granularity of the alumina is more than or equal to 325 meshes;
the silicon micro powder contains more than or equal to 95% of silicon dioxide and less than or equal to 1% of ferric oxide by mass, and the PH value is 5-8;
The 725 cement is cement with the label of 725, and contains more than or equal to 50% of aluminum oxide, less than or equal to 2.5% of ferric oxide and less than or equal to 8% of silicon dioxide by mass;
The Guangxi white clay is soft spherical refractory clay containing more than or equal to 31% of aluminum oxide and less than or equal to 55% of silicon dioxide.
More specifically, the insulating layer castable for the aluminum ash rotary kiln comprises the following raw materials in percentage by mass: 10-20% of flint clay with granularity of 5-3mm, 10-25% of flint clay with granularity of 3-1mm, 8-15% of flint clay with granularity of 1-0mm and 8-13% of flint clay with granularity of more than or equal to 200 meshes; 5-20% of bauxite with particle size of more than or equal to 325 meshes, 1-10% of silica micropowder, 20-30% of 725 cement and 2-18% of Guangxi white mud; and the additive sodium tripolyphosphate accounts for 0.1 to 0.4 percent of the total mass of the raw materials.
The invention relates to a preparation method of an insulating layer castable for an aluminum ash rotary kiln, which is characterized by comprising the following steps:
(1) The flint clay with granularity of 5-3mm, 3-1mm and 1-0mm is used as aggregate of the castable of the heat insulation layer, and other raw materials are powder materials;
(2) Firstly, adding all powder materials into a stirrer, and dry-mixing for at least 30 seconds; adding all aggregate, and continuously dry-mixing for at least 30 seconds; adding a proper amount of water, wet mixing for 120-180 seconds to uniformly stir the materials, and then vibrating and forming the materials on a vibrating table to prepare a strip-shaped sample;
(3) Naturally drying the sample at room temperature for 24 hours, demoulding, and drying at 105-110 ℃ for 20-30 hours to obtain the heat preservation castable.
Compared with the prior art, the invention has the following advantages:
The heat-insulating layer castable has the advantages of low volume density, low heat conductivity and high refractoriness, and can obviously improve heat-insulating performance and reduce heat dissipation when used at the heat-insulating layer part of the aluminum ash rotary kiln, thereby bringing considerable economic benefit.
Detailed Description
The invention is further illustrated by the following specific embodiments, which are intended to be illustrative of the invention and not limiting.
Example 1
The insulating layer castable for the aluminum ash rotary kiln comprises the following components in parts by mass: 15% of flint clay with granularity of 5-3mm, 15% of flint clay with granularity of 3-1mm, 12% of flint clay with granularity of 1-0mm, 12% of flint clay with granularity of more than or equal to 200 meshes, 12% of alumina with granularity of 325 meshes, 6% of silica powder, 26% of 725 cement and 3% of Guangxi white mud; an additive sodium tripolyphosphate accounting for 0.2% of the total mass of the raw materials;
The preparation method comprises the following steps:
(1) The flint clay with granularity of 5-3mm, 3-1mm and 1-0mm is used as aggregate of the castable of the heat insulation layer, and other raw materials are powder materials;
(2) Firstly, adding all powder materials into a stirrer, and dry-mixing for 30 seconds; adding all aggregate, and continuously dry-mixing for 30 seconds; adding a proper amount of water, wet mixing for 120 seconds to uniformly stir the materials, and vibrating the materials on a vibrating table for 60 seconds to form a strip sample with the thickness of 40mm multiplied by 160 mm;
(3) And naturally drying the sample at room temperature for 24 hours, demolding, and then preserving heat at 110 ℃ for 24 hours to obtain the heat preservation castable.
Example 2
The insulating layer castable for the aluminum ash rotary kiln comprises the following components in parts by mass: 15% of flint clay with granularity of 5-3mm, 25% of flint clay with granularity of 3-1mm, 8% of flint clay with granularity of 1-0mm and 8% of flint clay with granularity of more than or equal to 200 meshes; alumina with granularity of 325 meshes 10%, silicon micropowder 6%,725 cement 25% and Guangxi white mud 3%; an additive sodium tripolyphosphate accounting for 0.2% of the total mass of the raw materials; the preparation method is the same as in example 1.
Example 3
The insulating layer castable for the aluminum ash rotary kiln comprises the following components in parts by mass: 10% of flint clay with granularity of 5-3mm, 20% of flint clay with granularity of 3-1mm, 15% of flint clay with granularity of 1-0mm and 13% of flint clay with granularity of more than or equal to 200 meshes; alumina with granularity of 325 meshes is 8%, silica micropowder is 6%,725 cement is 25% and Guangxi white mud is 3%; an additive sodium tripolyphosphate accounting for 0.2% of the total mass of the raw materials; the preparation method is the same as in example 1.
Example 4
The insulating layer castable for the aluminum ash rotary kiln comprises the following components in parts by mass: 20% of flint clay with granularity of 5-3mm, 10% of flint clay with granularity of 3-1mm, 10% of flint clay with granularity of 1-0mm and 10% of flint clay with granularity of more than or equal to 200 meshes; alumina with granularity of 325 meshes 10%, silica micropowder 5%,725 cement 20% and Guangxi white mud 15%; an additive sodium tripolyphosphate accounting for 0.3 percent of the total mass of the raw materials; the preparation method is the same as in example 1.
The insulating layer castable obtained in examples 1 to 4 was examined, and the results are shown in Table 1.
Table 1 test results of the insulation castable of examples 1 to 4
As can be seen from Table 1, compared with the prior art, the volume density of the castable for the heat preservation layer prepared by the invention is lower than 1.5g/cm 3, the heat conductivity coefficient at 1000 ℃ is lower than 0.7W/(m.K), and the temperature of the shell of the rotary kiln is lower than 30-40 ℃ in actual use, thus having considerable economic benefit.
Claims (5)
1. The insulating layer castable for the aluminum ash rotary kiln is characterized by comprising the following raw materials in percentage by mass: 10-20% of flint clay with granularity of 5-3mm, 10-25% of flint clay with granularity of 3-1mm, 8-15% of flint clay with granularity of 1-0mm and 8-13% of flint clay with granularity of more than or equal to 200 meshes; 5-20% of bauxite with particle size of more than or equal to 325 meshes, 1-10% of silica micropowder, 20-30% of 725 cement and 2-18% of Guangxi white mud; sodium tripolyphosphate as an additive accounting for 0.1-0.4% of the total mass of the raw materials; the flint clay contains more than or equal to 45% of aluminum oxide, less than or equal to 1.2% of ferric oxide, and the volume density of the flint clay is more than or equal to 2.5g/cm 3.
2. The castable for the heat insulation layer for the aluminum ash rotary kiln according to claim 1, wherein the alumina contains more than or equal to 60% by mass of aluminum oxide, and the granularity of the alumina is more than or equal to 325 meshes; the silicon micropowder contains more than or equal to 95% of silicon dioxide and less than or equal to 1% of ferric oxide by mass, and the PH value is 5-8.
3. The castable for the insulating layer for the aluminum ash rotary kiln according to claim 1, wherein 725 cement is cement with a label of 725, and contains more than or equal to 50% of aluminum oxide, less than or equal to 2.5% of ferric oxide and less than or equal to 8% of silicon dioxide by mass.
4. The castable for the heat insulation layer for the aluminum ash rotary kiln according to claim 1, wherein the Guangxi white clay is soft spherical refractory clay containing more than or equal to 31% of aluminum oxide and less than or equal to 55% of silicon dioxide.
5. The method for preparing the insulating layer castable for the aluminum ash rotary kiln according to any one of claims 1 to 4, comprising the following steps:
(1) The flint clay with granularity of 5-3mm, 3-1mm and 1-0mm is used as aggregate of the castable of the heat insulation layer, and other raw materials are powder materials;
(2) Firstly, adding all powder materials into a stirrer, and dry-mixing for at least 30 seconds; adding all aggregate, and continuously dry-mixing for at least 30 seconds; adding a proper amount of water, wet mixing for 120-180 seconds to uniformly stir the materials, and then vibrating and forming the materials on a vibrating table to prepare a strip-shaped sample;
(3) Naturally drying the sample at room temperature for 24 hours, demoulding, and drying at 105-110 ℃ for 20-30 hours to obtain the heat preservation castable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211685836.0A CN116178031B (en) | 2022-12-27 | 2022-12-27 | Insulating layer castable for aluminum ash rotary kiln and preparation method thereof |
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| CN202211685836.0A CN116178031B (en) | 2022-12-27 | 2022-12-27 | Insulating layer castable for aluminum ash rotary kiln and preparation method thereof |
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| CN116178031B true CN116178031B (en) | 2024-07-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104193354A (en) * | 2014-08-08 | 2014-12-10 | 上海利尔耐火材料有限公司 | Permanent layer casting material of tundish and preparation method of permanent layer casting material |
| CN114292118A (en) * | 2022-02-23 | 2022-04-08 | 上海利尔耐火材料有限公司 | Long-life castable for waste incinerator and preparation method thereof |
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