CN116462215B - Recycling treatment method of secondary aluminum ash - Google Patents
Recycling treatment method of secondary aluminum ash Download PDFInfo
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- CN116462215B CN116462215B CN202310348500.3A CN202310348500A CN116462215B CN 116462215 B CN116462215 B CN 116462215B CN 202310348500 A CN202310348500 A CN 202310348500A CN 116462215 B CN116462215 B CN 116462215B
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- leaching
- aluminum ash
- slag
- secondary aluminum
- roasting
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000011282 treatment Methods 0.000 title claims abstract description 28
- 238000004064 recycling Methods 0.000 title claims abstract description 23
- 238000002386 leaching Methods 0.000 claims abstract description 118
- 239000002893 slag Substances 0.000 claims abstract description 67
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 54
- 239000002253 acid Substances 0.000 claims abstract description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 21
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims abstract description 16
- 238000000967 suction filtration Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 7
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 7
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 8
- 239000012629 purifying agent Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 4
- 239000002910 solid waste Substances 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract 1
- QPILZZVXGUNELN-UHFFFAOYSA-M sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonate;hydron Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S([O-])(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-M 0.000 description 14
- 230000008569 process Effects 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 239000010431 corundum Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 235000021110 pickles Nutrition 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
- C01F7/57—Basic aluminium chlorides, e.g. polyaluminium chlorides
-
- 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
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/0693—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process from waste-like raw materials, e.g. fly ash or Bayer calcination dust
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of solid waste recycling treatment, and discloses a recycling treatment method of secondary aluminum ash. The processing method comprises the following steps: (1) Mixing the secondary aluminum ash with sodium hydroxide solution, heating and leaching, filtering to obtain leaching liquid and filtering slag, and drying the filtering slag to obtain alkaline leaching slag; (2) Mixing the alkaline leaching residue obtained in the step (1) with a hydrochloric acid solution, heating and leaching, adding polyethylene glycol, stirring and mixing uniformly, carrying out suction filtration to obtain leaching liquid and filtering residue, and drying the filtering residue to obtain acid leaching residue; (3) Mixing the acid leaching slag obtained in the step (2) with sodium carbonate, and roasting and activating at 800-900 ℃ to obtain roasting slag; (4) And (3) carrying out acid leaching, water leaching or alkaline leaching treatment on the roasting slag obtained in the step (3), and carrying out suction filtration to obtain leaching liquid and residual solid slag. The method can obviously improve the leaching and recycling utilization rate of Al in the secondary aluminum ash.
Description
Technical Field
The invention belongs to the technical field of solid waste recycling treatment, and particularly relates to a recycling treatment method of secondary aluminum ash.
Background
Aluminum ash is a solid waste generated in the processes of aluminum electrolysis, aluminum processing and aluminum regeneration, and can be divided into primary aluminum ash and secondary aluminum ash, aluminum-containing waste such as aluminum scraps, aluminum slag and the like can be directly generated in the processes of electrolytic aluminum, aluminum processing and aluminum regeneration melting, and the waste is called as primary aluminum ash. The metal aluminum content in the primary aluminum ash exceeds 30%, and the waste residue obtained after the above treatments such as ash frying, squeezing or rotary kiln treatment is called secondary aluminum ash. The waste water belongs to dangerous waste because of containing a small amount of toxic substances such as heavy metal elements, fluorides and the like. With the rapid development of the electrolytic aluminum industry, the annual aluminum ash yield is large, so the economic and effective recovery and comprehensive utilization of the aluminum ash have great value.
Treating aluminum ash generally comprises two parts: firstly, extracting aluminum ash for the first time, wherein the mass fraction of Al element is 15% -75%, the Al element is generally gray, and the Al element is also called as white aluminum ash, and metal Al is usually extracted by a method of parching ash and the like. The main process of the ash frying method is that aluminum ash and a certain amount of salt flux are added into an iron pan, heat released by the self oxidation of the aluminum ash is utilized for heat supply, a spade is used for stir-frying, and substances such as magnesium in the aluminum ash are continuously oxidized for heat release, so that metal aluminum is melted and collected at the bottom of the iron pan, and molten aluminum water can flow out from the bottom for further recovery; secondly, the secondary aluminum ash, wherein the Al element is about 7% -30%, is generally black, and is also called as black aluminum ash, and the part of the aluminum ash has low metal aluminum content, complex components and high treatment difficulty, so that the traditional disposal method is mostly landfilled or discarded. However, the secondary aluminum ash has dangerous characteristics of reactivity (R) and toxicity (T), environmental pollution exists in direct landfill or disposal, and valuable metal aluminum element in the secondary aluminum ash cannot be effectively utilized.
Patent CN 111233003A discloses an acid-base combination process for completely realizing recycling of high-fluorine secondary aluminum ash, which comprises the following steps: ball milling high-fluorine secondary aluminum ash, screening to remove metal aluminum, and dividing into two parts; soaking in water, then leaching with acid, and performing solid-liquid separation to obtain acid leaching solution and acid leaching slag; mixing the other part with alkali solution, and performing solid-liquid separation after alkali leaching to obtain alkali leaching solution and alkali leaching slag; the pH value of the pickle liquor and the alkaline liquor is close to neutral after being mixed according to the proportion, the pickle liquor and the alkaline liquor are filtered after being stirred, the electrolyte product is obtained after the solid is baked and dehydrated, and the filtrate is returned to the ball milling process. The patent mainly converts elements such as nitrogen, fluorine, sodium, aluminum and the like leached by the electrolytic aluminum ash into ammonia water and electrolyte products in a leaching mode, and simultaneously obtains high-purity aluminum oxide (namely acid leaching slag and alkaline leaching slag), and can be used as raw materials for preparing products such as high-alumina brick refractory materials and the like. Patent CN 112266063A discloses a method for preparing polyaluminium chloride water purifying agent from secondary aluminum ash of secondary aluminum, and liquid polyaluminium chloride product is prepared by sieving, washing, filtering, acid leaching, suction filtration and polymerization curing in sequence. Patent CN 109761323A discloses a method for preparing a water purifying agent containing polyaluminum chloride from aluminum ash, hydrochloric acid and optionally red mud, comprising the following steps: mixing aluminum ash with sodium carbonate and/or sodium hydroxide and calcium-containing raw materials, roasting at 400-1000 ℃ in an oxidizing atmosphere, reacting the roasting generated material with hydrochloric acid and optional red mud, and filtering to obtain the water purifying agent containing polyaluminium chloride.
The prior art discloses the recycling of aluminum element in the secondary aluminum ash, but the recycling utilization rate of the secondary aluminum ash needs to be further improved.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention aims to provide a recycling treatment method of secondary aluminum ash. The method can obviously improve the leaching and recycling utilization rate of Al in the secondary aluminum ash.
The invention aims at realizing the following technical scheme:
a recycling treatment method of secondary aluminum ash comprises the following steps:
(1) Mixing the secondary aluminum ash with sodium hydroxide solution, heating and leaching, filtering to obtain leaching liquid and filtering slag, and drying the filtering slag to obtain alkaline leaching slag;
(2) Mixing the alkaline leaching residue obtained in the step (1) with a hydrochloric acid solution, heating and leaching, adding polyethylene glycol, stirring and mixing uniformly, carrying out suction filtration to obtain leaching liquid and filtering residue, and drying the filtering residue to obtain acid leaching residue;
(3) Mixing the acid leaching slag obtained in the step (2) with sodium carbonate, and roasting and activating at 800-900 ℃ to obtain roasting slag;
(4) And (3) carrying out acid leaching, water leaching or alkaline leaching treatment on the roasting slag obtained in the step (3), and carrying out suction filtration to obtain leaching liquid and residual solid slag.
Further, in the step (1), the mass ratio of the secondary aluminum ash to the sodium hydroxide is 50:3-10:1.
Further, in the step (1), the liquid-solid ratio (ml/g) of the secondary aluminum ash and the sodium hydroxide solution is 3:1-6:1.
Further, the temperature of the heating leaching in the step (1) is 80-100 ℃ and the time is 3-4 h.
Further, in the step (2), the liquid-solid ratio (ml/g) of the alkaline leaching residue and the hydrochloric acid solution is 3:1-6:1.
Further, the temperature of the heating leaching in the step (2) is 80-100 ℃ and the time is 3-5 h.
Further, the addition amount of the polyethylene glycol in the step (2) is 1-5% of the mass of the alkaline leaching residue.
Further, in the step (3), the mass ratio of the acid leaching slag to the sodium carbonate is 1:1-5:1.
Further, the roasting activation treatment in the step (3) is carried out for 2-4 hours.
Further, the leachate obtained in the steps (1), (2) and (4) is used as a raw material for preparing the polyaluminum chloride water purifying agent.
The principle of the invention is as follows:
firstly, removing a large amount of AlN in secondary aluminum ash by alkaline leaching, wherein the Al in the residual residues mainly exists in the forms of corundum, magnesia-alumina spinel, a small amount of AlN, metallic Al and the like, and the substances can react with HCl solution to obtain AlCl 3 The solution, the main reaction of leaching is as follows:
AlN+NaOH+H 2 O＝NaAlO 2 +NH 3 ↑ (1)
2Al+6HCl＝2AlCl 3 +3H 2 ↑ (2)
Al 2 O 3 +6HCl＝2AlCl 3 +3H 2 O (3)
AlN+4HCl＝AlCl 3 +NH 4 Cl (4)
and leaching nitrogen in the secondary aluminum ash and Al which is easier to leach by acid leaching to obtain acid leaching residues, wherein the added polyethylene glycol plays a role of a flocculant, partial aluminum chloride colloid can be generated in the solution after acid leaching, and the polyethylene glycol is added as the flocculant to facilitate the suction filtration process after the stirring leaching is finished. And then roasting the secondary aluminum ash acid leaching slag and sodium carbonate salt together, and activating at a high temperature through Na salt to break up hard structures such as corundum in the slag, thereby improving the leaching rate of Al in the acid leaching slag and further utilizing the resource.
Compared with the prior art, the invention has the beneficial effects that:
(1) The method provided by the invention obtains the polyaluminium chloride solution through alkaline leaching, acid leaching, roasting activation, leaching and other processes, can be used in the fields of drinking water, industrial water and sewage treatment, realizes recycling of aluminum in aluminum ash, reduces pollution and harm to the environment caused by aluminum ash stockpiling, and can relieve bauxite resource pressure.
(2) The invention solves the defects that the most main component aluminum oxide (corundum) in aluminum ash cannot be utilized and is wasted greatly due to poor activity.
Drawings
FIG. 1 is an external view of the secondary aluminum ash as it is (a) and the secondary aluminum ash acid leaching residue (b) and the roasting residue sample (c) obtained after leaching in example 1 of the present invention.
FIG. 2 shows XRD patterns of the secondary aluminum ash as it is (a) and the secondary aluminum ash acid leaching residue (b) and the roasting residue sample (c) obtained after leaching in example 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
Comparative example 1
Alkaline leaching is carried out on a secondary aluminum ash sample for 3 hours through a sodium hydroxide solution at the temperature of 90 ℃, the liquid-solid ratio (ml/g) is 3:1, the mass ratio of the secondary aluminum ash to the sodium hydroxide is 20:1, the secondary aluminum ash is dried after suction filtration, the alkaline leaching slag is stirred and leached for 3 hours through 6M HCl at the temperature of 90 ℃ according to the liquid-solid ratio of 3:1, the suction filtration is carried out, and the filtering slag is dried at the temperature of 70 ℃ to obtain secondary aluminum ash leaching slag; then 1g of secondary aluminum ash acid leaching slag is leached by 20ml of deionized water, and leaching liquid is obtained. Determination of Al in leachate by ICP 3+ Concentration. In this comparative example, 10g of secondary aluminum ash was treated, and Al in the leachate was measured 3+ The concentration of Al in the acid leaching slag is calculated to be 439.24mg/L, and the leaching mass concentration of Al in the acid leaching slag is calculated to be 8.79mg/g.
Example 1
Alkaline leaching is carried out on a secondary aluminum ash sample for 3 hours through a sodium hydroxide solution at the temperature of 90 ℃, the liquid-solid ratio (ml/g) is 3:1, the mass ratio of the secondary aluminum ash to the sodium hydroxide is 20:1, the secondary aluminum ash is dried after suction filtration, the alkaline leaching slag is stirred and leached for 3 hours through 6M HCl at the temperature of 90 ℃ according to the liquid-solid ratio of 3:1, the suction filtration is carried out, and the filtering slag is dried at the temperature of 70 ℃ to obtain secondary aluminum ash leaching slag; then mixing the secondary aluminum ash acid leaching slag and sodium carbonate according to a ratio of 1:1, and roasting for 3 hours at 800 ℃ to obtain a roasting slag sample; and leaching 1g of the baked slag sample by using 20ml of deionized water to obtain a leaching solution. Determination of leachate by ICPAl 3+ Concentration. By determining Al in leaching liquid 3+ The concentration of Al in the roasted slag sample was calculated to be 1123.56mg/L, and the leaching mass concentration of Al in the roasted slag sample was calculated to be 22.47mg/g. The leaching solution obtained by the alkaline leaching, the acid leaching and the water leaching is further used as a raw material for preparing the polyaluminium chloride water purifying agent for recycling.
As can be seen from the comparison result of the comparative example 1, the leaching of Al in the secondary aluminum ash acid leaching slag is improved by adding sodium carbonate into the secondary aluminum ash acid leaching slag for roasting and activating treatment.
The appearance of the secondary aluminum ash treated in this example and the appearance of the leached secondary aluminum ash acid leaching slag and the appearance of the baked slag are shown in FIG. 1, and it can be seen from FIG. 1 that the secondary aluminum ash acid leaching slag is in the form of gray black powder and the baked slag is in the form of yellowish white powder. The XRD patterns of the secondary aluminum ash raw material before treatment and the secondary aluminum ash acid leaching slag and the roasting slag sample obtained after leaching in this example are shown in FIG. 2, and as can be seen from FIG. 2, the primary components of the secondary aluminum ash acid leaching slag sample are alumina and magnesia-alumina spinel, and the roasting slag sample is mainly magnesia-alumina spinel. Further proves that the sodium carbonate roasting activation treatment can break the hard structure of alumina such as corundum and the like.
Example 2
Alkaline leaching is carried out on a secondary aluminum ash sample for 4 hours through a sodium hydroxide solution at the temperature of 80 ℃, the liquid-solid ratio (ml/g) is 4:1, the mass ratio of the secondary aluminum ash to the sodium hydroxide is 10:1, the secondary aluminum ash is dried after suction filtration, the alkaline leaching slag is stirred and leached for 5 hours through 6M HCl at the temperature of 80 ℃ according to the liquid-solid ratio of 4:1, the suction filtration is carried out, and the filtering slag is dried at the temperature of 70 ℃ to obtain secondary aluminum ash leaching slag; then mixing the secondary aluminum ash acid leaching slag and sodium carbonate according to a ratio of 2:1, and roasting for 2 hours at 900 ℃ to obtain a roasting slag sample; and leaching 1g of the baked slag sample by using 20ml of hydrochloric acid solution to obtain a leaching solution. Determination of Al in leachate by ICP 3+ Concentration. By determining Al in leaching liquid 3+ The concentration of Al in the roasted slag sample was calculated to be 1210.24mg/L, and the leaching mass concentration of Al in the roasted slag sample was calculated to be 24.20mg/g.
Example 3
Alkaline leaching a secondary aluminum ash sample for 3 hours by a sodium hydroxide solution at 100 ℃, wherein the liquid-solid ratio (ml/g) is 5:1, the adding mass ratio of the secondary aluminum ash to sodium hydroxide is 40:1, suction filtering and drying, and carrying out liquid-solid ratio on alkaline leaching residues by 6M HCl according to 5:1Stirring and leaching for 3 hours at the temperature of 100 ℃, and then carrying out suction filtration, and drying the filter residues at the temperature of 70 ℃ to obtain secondary aluminum ash acid leaching residues; then mixing the secondary aluminum ash acid leaching slag and sodium carbonate according to a ratio of 3:1, and roasting for 4 hours at 800 ℃ to obtain a roasting slag sample; and leaching 1g of the baked slag sample by using 20ml of sodium hydroxide solution to obtain a leaching solution. Determination of Al in leachate by ICP 3+ Concentration. By determining Al in leaching liquid 3+ The concentration of Al in the roasted slag sample is calculated to be 1157.68mg/L, and the leaching mass concentration of Al in the roasted slag sample is calculated to be 23.15mg/g.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (8)
1. The recycling treatment method of the secondary aluminum ash is characterized by comprising the following specific treatment steps:
(1) Mixing the secondary aluminum ash with a sodium hydroxide solution, heating and leaching at 80-100 ℃, carrying out suction filtration to obtain a leaching solution and filtering slag, and drying the filtering slag to obtain alkaline leaching slag;
(2) Mixing the alkaline leaching residue obtained in the step (1) with a hydrochloric acid solution, heating and leaching at 80-100 ℃, adding polyethylene glycol, stirring and mixing uniformly, carrying out suction filtration to obtain leaching liquid and filtering residue, and drying the filtering residue to obtain acid leaching residue;
(3) Mixing the acid leaching slag obtained in the step (2) with sodium carbonate according to the mass ratio of 1:1-5:1, and then roasting and activating at 800-900 ℃ to obtain roasting slag;
(4) Carrying out water leaching treatment on the roasting slag obtained in the step (3), and carrying out suction filtration to obtain leaching liquid and residual solid slag;
the leaching solution obtained in the steps (1), (2) and (4) is used as a raw material for preparing the polyaluminum chloride water purifying agent.
2. The recycling treatment method of the secondary aluminum ash according to claim 1, wherein the mass ratio of the secondary aluminum ash to the sodium hydroxide added in the step (1) is 50:3-10:1.
3. The recycling method of secondary aluminum ash according to claim 1, wherein in the step (1), the liquid-solid ratio of the secondary aluminum ash to the sodium hydroxide solution is 3:1-6:1.
4. The recycling treatment method of secondary aluminum ash according to claim 1, wherein the heating leaching time in the step (1) is 3-4 hours.
5. The recycling treatment method of the secondary aluminum ash according to claim 1, wherein in the step (2), the liquid-solid ratio of the alkaline leaching residue and the hydrochloric acid solution is 3:1-6:1.
6. The recycling treatment method of secondary aluminum ash according to claim 1, wherein the heating leaching time in the step (2) is 3-5 hours.
7. The recycling treatment method of the secondary aluminum ash according to claim 1, wherein the adding amount of the polyethylene glycol in the step (2) is 1% -5% of the mass of the alkaline leaching residue.
8. The recycling treatment method of secondary aluminum ash according to claim 1, wherein the roasting activation treatment time in the step (3) is 2-4 hours.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712482A (en) * | 2009-12-07 | 2010-05-26 | 浙江师范大学 | Method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash |
| CN103555955A (en) * | 2013-11-13 | 2014-02-05 | 昆明冶金研究院 | Resource utilization method of aluminum ash |
| CN103952557A (en) * | 2014-03-20 | 2014-07-30 | 浙江大学 | Method for secondary acid leaching of alumina in coal ash residues |
| CN110394350A (en) * | 2019-07-25 | 2019-11-01 | 东北大学 | A method of recycling aluminium ash valuable component |
| CN112777620A (en) * | 2021-01-29 | 2021-05-11 | 哈尔滨工业大学（威海） | Method for recycling aluminum ash or aluminum slag by using alkaline leaching method |
| CN113233482A (en) * | 2021-07-01 | 2021-08-10 | 东北大学 | Secondary aluminum ash resource utilization method |
| CN114032396A (en) * | 2021-11-09 | 2022-02-11 | 东北大学 | Method for treating aluminum ash by low-temperature harmless wet method |
| CN114620752A (en) * | 2022-03-28 | 2022-06-14 | 中南大学 | Pretreatment method of secondary aluminum ash, water purifying agent and application |
-
2023
- 2023-04-04 CN CN202310348500.3A patent/CN116462215B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712482A (en) * | 2009-12-07 | 2010-05-26 | 浙江师范大学 | Method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash |
| CN103555955A (en) * | 2013-11-13 | 2014-02-05 | 昆明冶金研究院 | Resource utilization method of aluminum ash |
| CN103952557A (en) * | 2014-03-20 | 2014-07-30 | 浙江大学 | Method for secondary acid leaching of alumina in coal ash residues |
| CN110394350A (en) * | 2019-07-25 | 2019-11-01 | 东北大学 | A method of recycling aluminium ash valuable component |
| CN112777620A (en) * | 2021-01-29 | 2021-05-11 | 哈尔滨工业大学（威海） | Method for recycling aluminum ash or aluminum slag by using alkaline leaching method |
| CN113233482A (en) * | 2021-07-01 | 2021-08-10 | 东北大学 | Secondary aluminum ash resource utilization method |
| CN114032396A (en) * | 2021-11-09 | 2022-02-11 | 东北大学 | Method for treating aluminum ash by low-temperature harmless wet method |
| CN114620752A (en) * | 2022-03-28 | 2022-06-14 | 中南大学 | Pretreatment method of secondary aluminum ash, water purifying agent and application |
Non-Patent Citations (1)
| Title |
|---|
| 寇杰等主编.油田水处理.中国石油大学出版社,2018,138. * |
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