CN115321566A - Method for preparing aluminum oxide by resource utilization of aluminum ash - Google Patents
Method for preparing aluminum oxide by resource utilization of aluminum ash Download PDFInfo
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- CN115321566A CN115321566A CN202210070619.4A CN202210070619A CN115321566A CN 115321566 A CN115321566 A CN 115321566A CN 202210070619 A CN202210070619 A CN 202210070619A CN 115321566 A CN115321566 A CN 115321566A
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- aluminum
- ash
- sodium aluminate
- aluminum ash
- preparing
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 35
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims abstract description 26
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 55
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 24
- 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 20
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 12
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 12
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000010304 firing Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 7
- 239000011819 refractory material Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000003463 adsorbent Substances 0.000 abstract description 2
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 239000010813 municipal solid waste Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- -1 aluminum compound Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/08—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals with sodium carbonate, e.g. sinter processes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention provides a method for preparing aluminum hydroxide by utilizing aluminum ash as a resource, which comprises the steps of uniformly mixing the aluminum ash (calculated by aluminum oxide) and soda ash according to a reaction molar ratio, roasting at high temperature to obtain crude sodium aluminate, dissolving the crude sodium aluminate into a sodium aluminate solution, adjusting pH, washing, filtering, and firing filter residues at high temperature to obtain an aluminum oxide product. The method has simple process, and can change the industrial waste aluminum ash into valuable, change the industrial garbage polluting the environment into useful raw materials and realize the harmless and recycling treatment of the waste aluminum ash; the cost for treating the aluminum ash is reduced, and the process is simple and feasible; the obtained alumina is an aluminum oxide having high hardness and a wide range of applications, and is widely used for adsorbents, refractory materials, and the like.
Description
Technical Field
The invention relates to a method for preparing aluminum oxide by recycling aluminum ash, in particular to a method for preparing aluminum oxide by recycling aluminum element in aluminum ash, belonging to the technical field of resource recovery.
Background
The aluminum ash or aluminum ash slag is solid waste discharged in the aluminum electrolysis, aluminum processing and secondary aluminum processing. In recent years, in the face of increasingly strict environment situation, the disposal of hazardous waste aluminum ash in the aluminum industry becomes a focus problem in the industry. The characteristics of the aluminum ash are reflected in three aspects: has toxicity, most of which belongs to dangerous waste; the quantity is large, and millions of tons of discharged quantities are discharged every year in China; has metallic aluminum, aluminum compound and heat energy, and has high potential value. The domestic primary aluminum ash has high metal aluminum content and economic value, so that the domestic primary aluminum ash is regarded and treated by enterprises as a resource. The potential value of the aluminum ash is mainly reflected in the contained metallic aluminum, aluminum oxide, fluoride salt, the contained heat energy and the like. The secondary aluminum ash is used as a remainder after the primary aluminum ash is subjected to aluminum extraction, and before the environmental protection tax is implemented, the secondary aluminum ash is abandoned or buried due to the lack of treatment projects with low investment and high benefit in the technology and economy in China, so that the resources are wasted, the environment is polluted, and the method is quite incompatible with the current concept of green development. Therefore, the resource utilization of the aluminum ash is very important, and the research on producing valuable products by utilizing the aluminum ash is more and more focused.
The aluminum-containing components in the aluminum ash mainly comprise aluminum nitride, aluminum oxide and metal aluminum, and the resource utilization of the aluminum ash at present comprises the following steps:
1. chemical treatment method: treating the aluminum ash with hydrochloric acid or sulfuric acid to dissolve out aluminum, and then adding an organic additive to carry out polymerization reaction to prepare polyaluminium chloride or polyaluminium sulfate. Polyaluminium sulfate is a commonly used flocculant in the field of water treatment.
2. Physical treatment method: the aluminum ash contains a large amount of alumina, and the alumina is separated by a physical screening method, and is a production raw material of the refractory material. The refractory material is widely applied to high-temperature industries such as metallurgy, cement, ceramic glass and the like.
The existing aluminum ash recycling method has complex process and low utilization efficiency.
Alumina is a high hardness compound, an ionic crystal that is ionizable at high temperatures, and is commonly used in the manufacture of refractory materials.
Disclosure of Invention
The method for preparing the aluminum oxide by resource utilization of the aluminum ash is simple in process and easy to operate.
The invention is realized by the following technical scheme:
a method for preparing aluminum oxide by utilizing aluminum ash as a resource comprises the steps of uniformly mixing the aluminum ash and soda ash, roasting at high temperature to obtain crude sodium aluminate, dissolving the crude sodium aluminate into a sodium aluminate solution, adjusting pH, washing, filtering, and firing at high temperature to obtain an aluminum oxide product.
Specifically, the method for preparing aluminum oxide by resource utilization of aluminum ash comprises the following steps:
1) Uniformly mixing aluminum ash (calculated by alumina) and soda ash in a reaction molar ratio;
2) Roasting the uniformly mixed materials at high temperature until the reaction is complete to obtain crude sodium aluminate;
3) Adding water with the mass of 4 times of that of the crude sodium aluminate in the step 2), fully dissolving under a heating condition, and filtering to obtain a sodium aluminate solution;
4) Adding acid into the sodium aluminate solution in the step 3) to adjust the pH value, and then filtering and washing to obtain aluminum hydroxide;
5) And 4) firing the aluminum hydroxide at high temperature in the step 4) to obtain an aluminum oxide product.
The reaction molar ratio in the step 1) is M (Al) 2 O 3 )∶M(Na 2 CO 3 )＝1∶1.03-1.05。
The high temperature in the step 2) is 1100-1200 ℃ and the time is 1-2 hours. Under high temperature condition, metal aluminum is oxidized into alumina, aluminum nitride is reacted into alumina, and the alumina is reacted with sodium carbonate to produce sodium aluminate.
The heating condition in the step 3) is 70-80 ℃ and the time is 30-60 minutes.
The pH value adjusted in step 4) is in the range of 6 to 7, within which pH range sodium aluminate is converted to aluminium hydroxide precipitate.
The high-temperature burning condition in the step 5) is 1100-1200 ℃ for 2-3 hours.
The method has simple process, and can change the industrial waste aluminum ash into valuable, change the industrial garbage polluting the environment into useful raw materials and realize the harmless and recycling treatment of the waste aluminum ash; the cost for treating the aluminum ash is reduced, and the process is simple and feasible; the obtained alumina is an aluminum oxide having high hardness and a wide range of applications, and is widely used for adsorbents, refractory materials, and the like.
Drawings
FIG. 1 is a process flow diagram of the present invention
Detailed Description
In order to more clearly describe the present invention, the present invention will be further described in detail with reference to FIG. 1.
As shown in figure 1, the method for preparing alumina by recycling aluminum ash comprises the steps of uniformly mixing aluminum ash and soda ash, roasting at high temperature to obtain crude sodium aluminate, dissolving the crude sodium aluminate into a sodium aluminate solution, adjusting pH, washing, filtering, and firing at high temperature to obtain an alumina product.
Example 1
A method for preparing aluminum hydroxide by utilizing aluminum ash in a resource manner comprises the steps of uniformly mixing 1Kg of aluminum ash (0.665 Kg of aluminum oxide) and 0.712Kg of soda ash; placing the mixed material into a high-temperature furnace, and roasting for 2 hours at 1100 ℃ to obtain crude sodium aluminate; adding water with the mass of 4 times of that of the crude sodium aluminate into the crude sodium aluminate, heating the crude sodium aluminate at 70 ℃ for 60 minutes to fully dissolve the crude sodium aluminate, and filtering the solution to obtain a sodium aluminate solution; adding acid into the sodium aluminate solution to adjust the pH =6, washing, filtering, and burning at 1200 ℃ for 2 hours to obtain about 0.66Kg of alumina product.
Example 2
A method for preparing aluminum hydroxide by utilizing aluminum ash in a recycling manner comprises the steps of uniformly mixing 1.2Kg of aluminum ash (0.798 Kg of aluminum oxide) and 0.871Kg of soda ash; placing the mixed material into a high-temperature furnace, and roasting at 1200 ℃ for 1 hour to obtain crude sodium aluminate; adding water with the mass of 4 times of that of the crude sodium aluminate, heating at 80 ℃ for 30 minutes to fully dissolve the crude sodium aluminate, and filtering to obtain a sodium aluminate solution; the sodium aluminate solution is added with acid to adjust the pH =6, washed, filtered and burned at 1100 ℃ for 3 hours to obtain about 0.795Kg of alumina product.
Example 3
A method for preparing aluminum hydroxide by resource utilization of aluminum ash comprises the steps of uniformly mixing 1.5Kg of aluminum ash (0.998 Kg of aluminum oxide) and 1.068Kg of soda ash; placing the mixed material into a high-temperature furnace, and roasting for 1 hour at 1200 ℃ to obtain crude sodium aluminate; adding water with the mass of 4 times of that of the crude sodium aluminate into the crude sodium aluminate, heating the crude sodium aluminate at 70 ℃ for 30 minutes to fully dissolve the crude sodium aluminate, and filtering the solution to obtain a sodium aluminate solution; adding acid into the sodium aluminate solution to adjust the pH value to be =6, washing, filtering and burning for 3 hours at 1200 ℃ to obtain about 1.002Kg of alumina product.
Example 4
A method for preparing aluminum hydroxide by resource utilization of aluminum ash comprises the steps of uniformly mixing 1.6Kg of aluminum ash (1.064 Kg of aluminum oxide) and 1.139Kg of soda ash; placing the mixed material into a high-temperature furnace to roast for 2 hours at 1100 ℃ to obtain crude sodium aluminate; adding water with the mass of 4 times of that of the crude sodium aluminate into the crude sodium aluminate, heating the crude sodium aluminate at 70 ℃ for 45 minutes to fully dissolve the crude sodium aluminate, and filtering the solution to obtain a sodium aluminate solution; and adding acid into the sodium aluminate solution to adjust the pH value to be =6, washing, filtering, and burning at 1100 ℃ for 2 hours to obtain about 1.068Kg of alumina product.
Example 5
A method for preparing aluminum hydroxide by utilizing aluminum ash in a resource manner comprises the steps of uniformly mixing 10Kg of aluminum ash (6.65 Kg of aluminum oxide) and 7.12Kg of soda ash; placing the mixed material into a high-temperature furnace, and roasting at 1200 ℃ for 1 hour to obtain crude sodium aluminate; adding water with the mass of 4 times of that of the crude sodium aluminate into the crude sodium aluminate, heating the crude sodium aluminate at the temperature of 80 ℃ for 60 minutes to fully dissolve the crude sodium aluminate, and filtering the solution to obtain a sodium aluminate solution; the sodium aluminate solution is added with acid to adjust the pH =6, washed, filtered and burned at 1200 ℃ for 2 hours to obtain about 6.645Kg of alumina.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.
Claims (7)
1. A method for preparing aluminum oxide by utilizing aluminum ash as a resource comprises the steps of uniformly mixing the aluminum ash and soda ash, roasting at high temperature to obtain crude sodium aluminate, dissolving the crude sodium aluminate into a sodium aluminate solution, adjusting pH, washing, filtering, and firing at high temperature to obtain an aluminum oxide product.
2. The method for preparing the aluminum oxide by resource utilization of the aluminum ash as claimed in claim 1, which is characterized by comprising the following steps:
1) Uniformly mixing aluminum ash (calculated by alumina) and soda ash in a reaction molar ratio;
2) Roasting the uniformly mixed materials at high temperature until the reaction is complete to obtain crude sodium aluminate;
3) Adding water with the mass of 4 times of that of the crude sodium aluminate in the step 2), fully dissolving under a heating condition, and filtering to obtain a sodium aluminate solution;
4) Adding acid into the sodium aluminate solution in the step 3) to adjust the pH value, and then filtering and washing to obtain aluminum hydroxide;
5) And 4) firing the aluminum hydroxide at high temperature in the step 4) to obtain an aluminum oxide product.
3. The method for preparing aluminum oxide by resource utilization of aluminum ash as claimed in claim 2, wherein the reaction molar ratio in the step 1) is M (Al) 2 O 3 )：M(Na 2 CO 3 )＝1：1.03-1.05。
4. The method for preparing alumina by resource utilization of aluminum ash as claimed in any one of claims 2 or 3, wherein the high temperature in the step 2) is 1100-1200 ℃, and the reaction time is 1-2 hours.
5. The method for preparing alumina by resource utilization of aluminum ash as claimed in any one of claims 2 or 3, wherein the heating condition in the step 3) is 70-80 ℃ and the time is 30-60 minutes.
6. The method for preparing alumina by resource utilization of aluminum ash as claimed in any one of claims 2 or 3, wherein the pH value is adjusted to be in the range of 6-7 in the step 4).
7. The method for preparing aluminum oxide by resource utilization of aluminum ash as claimed in claim 6, wherein the high temperature burning condition in the step 5) is 1100-1200 ℃ for 2-3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210070619.4A CN115321566A (en) | 2022-01-21 | 2022-01-21 | Method for preparing aluminum oxide by resource utilization of aluminum ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210070619.4A CN115321566A (en) | 2022-01-21 | 2022-01-21 | Method for preparing aluminum oxide by resource utilization of aluminum ash |
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| CN115321566A true CN115321566A (en) | 2022-11-11 |
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| CN202210070619.4A Pending CN115321566A (en) | 2022-01-21 | 2022-01-21 | Method for preparing aluminum oxide by resource utilization of aluminum ash |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673084A (en) * | 2004-12-03 | 2005-09-28 | 潘坤涛 | Process of producing alumina with waste aluminium ash |
| CN1817795A (en) * | 2006-01-24 | 2006-08-16 | 杜梅生 | Production of aluminium hydrate from aluminium ash |
| CN104261445A (en) * | 2014-09-26 | 2015-01-07 | 昆明冶金研究院 | Method for harmlessly treating aluminum ash and preparing sandy alumina |
| CN107758682A (en) * | 2017-09-05 | 2018-03-06 | 山东鲁北企业集团总公司 | The disposable method for utilizing aluminum oxide in aluminium ash |
| CN112279283A (en) * | 2020-10-29 | 2021-01-29 | 昆明理工大学 | Method for comprehensively utilizing secondary aluminum ash |
-
2022
- 2022-01-21 CN CN202210070619.4A patent/CN115321566A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673084A (en) * | 2004-12-03 | 2005-09-28 | 潘坤涛 | Process of producing alumina with waste aluminium ash |
| CN1817795A (en) * | 2006-01-24 | 2006-08-16 | 杜梅生 | Production of aluminium hydrate from aluminium ash |
| CN104261445A (en) * | 2014-09-26 | 2015-01-07 | 昆明冶金研究院 | Method for harmlessly treating aluminum ash and preparing sandy alumina |
| CN107758682A (en) * | 2017-09-05 | 2018-03-06 | 山东鲁北企业集团总公司 | The disposable method for utilizing aluminum oxide in aluminium ash |
| CN112279283A (en) * | 2020-10-29 | 2021-01-29 | 昆明理工大学 | Method for comprehensively utilizing secondary aluminum ash |
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Application publication date: 20221111 |