CN110394350A - A method of recycling aluminium ash valuable component - Google Patents
A method of recycling aluminium ash valuable component Download PDFInfo
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- CN110394350A CN110394350A CN201910674835.8A CN201910674835A CN110394350A CN 110394350 A CN110394350 A CN 110394350A CN 201910674835 A CN201910674835 A CN 201910674835A CN 110394350 A CN110394350 A CN 110394350A
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- aluminium ash
- aluminium
- valuable component
- recycling
- fine powder
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 120
- 239000004411 aluminium Substances 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004064 recycling Methods 0.000 title claims abstract description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000010612 desalination reaction Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 11
- 239000007790 solid phase Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000013019 agitation Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 19
- 239000007791 liquid phase Substances 0.000 claims description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002425 crystallisation Methods 0.000 claims description 7
- 230000008025 crystallization Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- 239000006210 lotion Substances 0.000 claims description 3
- QPILZZVXGUNELN-UHFFFAOYSA-N sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonic acid Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S(O)(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 71
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 11
- 229910017083 AlN Inorganic materials 0.000 description 10
- 150000003839 salts Chemical class 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 230000001698 pyrogenic effect Effects 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 229910052593 corundum Inorganic materials 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 5
- 229910052906 cristobalite Inorganic materials 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 229910052682 stishovite Inorganic materials 0.000 description 5
- 229910052905 tridymite Inorganic materials 0.000 description 5
- 239000007832 Na2SO4 Substances 0.000 description 4
- 229910052925 anhydrite Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 description 3
- 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 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 235000012245 magnesium oxide Nutrition 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 239000000274 aluminium melt Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- -1 nitrogen aluminium compound Chemical class 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/16—Halides of ammonium
- C01C1/164—Ammonium chloride
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A method of recycling aluminium ash valuable component, comprising the following steps: (1) aluminium ash is ground and obtain aluminium ash fine powder；(2) aluminium ash fine powder is placed in container, is added water and stirred；(3) heating and thermal insulation under agitation reacts water and AlN and generates NH3Discharge；Surplus material takes out filtering, and solid phase is desalination aluminium ash；(4) desalination aluminium ash washing and drying, is uniformly mixed with sulfuric acid solution, then is roasted with resistance furnace, and Al is made after furnace cooling2(SO4)3Clinker.The method of the present invention can effectively recycle the valuable component in aluminium ash, reduce the harm of aluminium ash, reduce production cost, increase economic efficiency, simple process is pollution-free.
Description
Technical field
The present invention relates to aluminium ash resource utilization technical field, in particular to a kind of side for recycling aluminium ash valuable component
Method.
Background technique
Aluminium ash results from the melting or aluminum electrolysis technology of metallic aluminium, by aluminium melt surface not molten mixture and its with add
Agent is added to carry out the material composition of physical reaction generation；Aluminium ash typically contains aluminium oxide (Al2O3), aluminium nitride (AlN) metallic aluminium
(Al), magnesia spinel (MgAlO4), periclase (MgO), quartz (SiO2) and salt fluxing agent, wherein salt fluxing agent contains a small amount of carbon
Compound and nitride；According to " European Dangerous waste catalogue " and " National Hazard waste register ", aluminium ash is classified as toxic and danger
Dangerous waste；Contain a large amount of nitrogen aluminium compound in aluminium ash, is reacted with water and generate NH3, atmosphere is polluted；China generates every year
2500000 tons of aluminium ash, if the mode directly buried is taken to handle, not only causes the waste of resource, will also cause to environment seriously
Pollution.
Aluminium ash is also referred to as aluminium lime-ash, can be divided into secondary aluminium ash and Quadratic aluminum dust；One secondary aluminium ash results from an aluminum i ndustry,
Since color is in canescence, so also referred to as lime, mainly contains metallic aluminium, content is 15~80%；One secondary aluminium ash carries out
Material after recycling metallic aluminium is referred to as Quadratic aluminum dust, and ingredient is relative complex, also referred to as grey black, and Quadratic aluminum dust main component is
Al2O3, AlN, NaCl, KCl and some other metal oxide (CaO, Fe2O3), wherein Al2O3Content is 30~50%；At present
The aluminium ash that domestic enterprise generates seldom is utilized recycling, there is very big utility value.Metallic aluminium, oxygen can be recycled using aluminium ash
Change aluminium, salt.
Currently, the method for the metallic aluminium in recycling aluminium ash mainly has pyrogenic process recycling, sieve method, electrical concentration both at home and abroad.
Pyrogenic process recycling saliferous pyrogenic process including saliferous pyrogenic process and not；Saliferous pyrogenic process, such as common stir-fry ash absorption method, it is main to utilize
The heat of aluminium ash itself, is added some salts as additive, and the metallic aluminium in aluminium ash is made to be fused into liquid phase at high temperature, due to
Metallic aluminium and aluminium ash are nonwetting, and metal aluminum density is larger and sinks to bottom, to realize the separation of metallic aluminium and ash；Not saliferous fire
Method, such as rotation electric furnace process, plasma turn arc furnace, and carrying out heating to aluminium ash often by external heat source melts metallic aluminium, from
And realize the separation of metallic aluminium Yu aluminium ash；Saliferous pyrogenic process generates flue dust, and environmental pollution is larger；And the method generates secondary
Aluminium ash contains a large amount of salt, is easy to produce secondary pollution, and removing these salt also will increase cost；Small without the pollution of saliferous pyrogenic process,
And do not need that salt is added in fusion process, subsequent processing is simple, but is disadvantageous in that energy consumption is larger.
Sieve method is to utilize metallic aluminium quality softer, crude metal aluminium can be recycled by crushing and sieving, by finely grinding
Mill and the screening recycling smaller metallic aluminium of partial size；Chinese patent (201721599784.X) discloses at a kind of sifting barrel and aluminium ash
Device is managed, aluminium ash is repeatedly sieved, is recycled and circular treatment, but sieve method production efficiency is low.
The principle of electrical concentration recycling metallic aluminium is to realize feed separation using the electrical property difference of each substance in aluminium ash；It is logical
Crossing keeps each component in aluminium ash electrically charged the mode that the rotary drum of electric separation equipment applies high-voltage direct current；Since metallic aluminium is than it
His component is easier to charge, so that more charges that alumina particles obtain, are adhered to rotary drum by electric field force effect；It is transferred to ground wire
Afterwards, alumina particles are detached from rotary drum because charge is lost, to realize the separation of metallic aluminium and aluminium ash；Chinese patent
(201820843135.8) a kind of cyclic processing device of electrostatic separator aluminum mixture ash particle is disclosed, but is disadvantageous in that and sets
Standby more complex, higher cost.
Extract Al2O3Route include acidic leaching method and alkaline extraction method.Ore Leaching agent and alkali leaching agent all can be by aluminium ashes
In metallic aluminium and its compound be converted into Al3+Or AlO2, by the way that H is added into solution2O2、(NH4)2CO3、NH4HCO3Equal objects
Matter and Al3+Or AlO2It generates Al (OH)3Precipitating, the latter generate Al by calcining2O3；Chinese patent (201510112638.9) is public
A kind of Al is opened2O3Recovery method, energy consumption is lower, but to aluminium ash in nitrogen, villaumite and villiaumite effectively recycled, aluminium
Ash fouling problem does not solve very well.
Major part aluminium ash takes the processing mode placed and filled at present, causes environmental pollution and the wasting of resources.
Summary of the invention
The object of the present invention is to provide a kind of methods for recycling aluminium ash valuable component, in conjunction with pyrogenic attack and wet-treating
Method recycles valuable element, reduces environmental pollution while simplifying technique reduces cost.
The method of the present invention includes the following steps:
1,300 meshes will be crossed after the grinding of aluminium ash, undersize material is as aluminium ash fine powder；
2, aluminium ash fine powder is placed in the container with exhaust pipe and stirring, stirring is then opened into container plus after water,
It is uniformly mixed water and aluminium ash fine powder；
3, under agitation by heating device to container heating and thermal insulation, the AlN in water and aluminium ash fine powder is made to react life
At NH3It is discharged by exhaust pipe；Material remaining in container is taken out, filtering obtains solid phase and liquid phase；Solid phase is desalination aluminium
Ash；
4, washing desalination aluminium ash to washing lotion is neutrality, then dries removal and divide water, is then uniformly mixed with sulfuric acid solution, then
It is roasted with resistance furnace, Al is made after furnace cooling2(SO4)3Clinker.
In above-mentioned step 2, the dosage of aluminium ash fine powder and water is 0.1~0.25g/mL by solid-to-liquid ratio.
In above-mentioned step 3, heating temperature is 70~90 DEG C, 2~6h of soaking time.
In above-mentioned step 3, NH3Absorption by Hydrochloric Acid is used after being discharged by exhaust pipe, and ammonium chloride is made；The mass concentration of hydrochloric acid
10~20%.
In above-mentioned step 3, the liquid phase of acquisition is heated to 150~220 DEG C and is evaporated crystallization, be made containing chloride and
The crystalline mixture of fluoride.
In above-mentioned step 4, the mass concentration 98% of sulfuric acid solution, desalination aluminium ash and sulfuric acid solution after washing drying
Dosage by solid-to-liquid ratio be 0.4~2g/mL, 150~260 DEG C of maturing temperature, 2~4h of calcining time.
In the above method, 98% or more the resolution ratio of AlN.
In above-mentioned step 3, the reaction equation of water and AlN reaction is；
AlN+4H2O→Al(OH)3↓+NH3↑。
Recycling salt is divided into two classes from aluminium ash: the first kind is the recycling of soluble-salt, contains a large amount of soluble-salt in aluminium ash,
At relatively high temperatures plus then deionized water dissolving passes through suction filtration, evaporation, crystallization are recycled；Second class is synthesized using aluminium ash
Sodium aluminate, aluminum sulfate etc. have high value-added product；Aluminium ash is dissolved in NaOH, aluminium ash is reacted with NaOH generates sodium aluminate, then
Sodium aluminate product is obtained after filtering purification；Similarly, aluminium ash can also be with H2SO4Reaction generates Al2(SO4)3, Al2(SO4)3It is nothing
One of basic kind of machine salt, using very extensive in terms of water purification and papermaking.
The method of the present invention can effectively recycle the valuable component in aluminium ash, largely reduce the harm of aluminium ash, especially
It is the AlN in aluminium ash, resolution ratio solves aluminium ash and constantly discharge NH in a humidity environment or in water body 98% or more3's
Problem；The NH generated in Soaking treatment3By HCl recovery, obtaining industrial by-products ammonium salt can be used as chemical fertilizer；Filtered liquid
Phase evaporative crystallization obtains villaumite and villiaumite mixture, as casting flux；Aluminium ash can replace aluminium vanadine to produce Al2(SO4)3
Product reduces production cost, increases economic efficiency, simple process is pollution-free.
Detailed description of the invention
Fig. 1 is the method flow schematic diagram of the recycling aluminium ash valuable component in the embodiment of the present invention；
Fig. 2 is the Al in the embodiment of the present invention 12(SO4)3Clinker XRD diagram.
Specific embodiment
Filtering is filtered using Buchner funnel in the embodiment of the present invention.
The X-ray diffraction used in the embodiment of the present invention sets model X Pertpro.
The water used in the embodiment of the present invention is deionized water.
The hydrochloric acid solution and sulfuric acid solution used in the embodiment of the present invention is commercial products preparation.
The Al obtained in the embodiment of the present invention2(SO4)3Clinker contains Al by mass percentage2(SO4)380.25~
83.18%, CaSO43.01~4.01%, SiO22.04~2.76%, Na2SO42.16~2.42%, Al2O32.18~
2.30%.
Being uniformly mixed desalination aluminium ash and sulfuric acid solution in the embodiment of the present invention is using silica crucible.
The aluminium ash Example components used in the embodiment of the present invention contain Al by mass percentage2O392.01%, CaO
3.63%, MgO 1.56%, SiO21.04%, Na2O 0.40%.
The rate of recovery >=90% of Al in the embodiment of the present invention.
The rate of recovery >=90% of villaumite and villiaumite in the embodiment of the present invention.
Technical solution of the present invention is described in detail below by specific case study on implementation.The example described is only this
A part of the embodiment of invention belongs to protection scope of the present invention based on all transformation of the invention.
Embodiment 1
Process is as shown in Figure 1；
300 meshes will be crossed after the grinding of aluminium ash, undersize material is as aluminium ash fine powder；
Aluminium ash fine powder is placed in the container with exhaust pipe and stirring, stirring is then opened into container plus after water, is made
Water and aluminium ash fine powder are uniformly mixed；The dosage of aluminium ash fine powder and water is 0.1g/mL by liquid-solid ratio；
Under agitation by heating device to container heating and thermal insulation, heating temperature is 70 DEG C, and soaking time 6h makes water
The NH generated with the AlN reaction in aluminium ash fine powder3It is discharged by exhaust pipe；Material remaining in container is taken out, filtering obtains
Solid phase and liquid phase；Solid phase is desalination aluminium ash；NH3Absorption by Hydrochloric Acid is used after being discharged by exhaust pipe, and ammonium chloride is made；The quality of hydrochloric acid
Concentration 10%；The liquid phase of acquisition is heated to 150 DEG C and is evaporated crystallization, and the crystallized mixed containing chloride and fluoride is made
Object；The resolution ratio 99.4% of AlN；Ammonium chloride is used to be used as chemical fertilizer；
It is neutrality that desalination aluminium ash, which is washed to washing lotion, then dries removal and divide water, is then uniformly mixed with sulfuric acid solution, sulfuric acid
The mass concentration 98% of solution, the dosage of desalination aluminium ash and sulfuric acid solution after washing drying are 0.5g/mL by solid-to-liquid ratio；It will mix
Material after conjunction is roasted with resistance furnace, and 260 DEG C of maturing temperature, Al is made after furnace cooling in calcining time 2h2(SO4)3Clinker,
XRD diagram as shown in Fig. 2, contain Al by mass percentage2(SO4)383.18%, CaSO43.01%, SiO22.04%, Na2SO4
2.42%, Al2O32.18%；Al2(SO4)3Clinker quality reaches HG2227-2004 standard, for making water purification agent；
Villaumite and the villiaumite rate of recovery 93.9%.
Embodiment 2
The same embodiment of method, difference is；
(1) dosage of aluminium ash fine powder and water is 0.2g/mL by liquid-solid ratio；
(2) heating temperature is 80 DEG C, soaking time 4h；The mass concentration 15% of hydrochloric acid；Liquid phase is heated to 220 DEG C and is steamed
Hair crystallization, the resolution ratio 98.4% of AlN；
(3) dosage of the desalination aluminium ash after washing drying and sulfuric acid solution is 1.5g/mL by solid-to-liquid ratio；By mixed object
Material is roasted with resistance furnace, and 220 DEG C of maturing temperature, Al is made after furnace cooling in calcining time 3h2(SO4)3Clinker, by quality percentage
Than containing Al2(SO4)382.33%, CaSO43.88%, SiO22.76%, Na2SO42.39%, Al2O32.27%；
(4) villaumite and the villiaumite rate of recovery 92.7%.
Embodiment 3
The same embodiment of method, difference is；
(1) dosage of aluminium ash fine powder and water is 0.25g/mL by liquid-solid ratio；
(2) heating temperature is 90 DEG C, soaking time 2h；The mass concentration 20% of hydrochloric acid；Liquid phase is heated to 200 DEG C and is steamed
Hair crystallization, the resolution ratio 98.3% of AlN；
(3) dosage of the desalination aluminium ash after washing drying and sulfuric acid solution is 2g/mL by solid-to-liquid ratio；By mixed material
It is roasted with resistance furnace, 180 DEG C of maturing temperature, Al is made after furnace cooling in calcining time 4h2(SO4)3Clinker, by mass percentage
Containing Al2(SO4)380.25%, CaSO44.01%, SiO22.46%, Na2SO42.16%, Al2O32.30%；
(4) villaumite and the villiaumite rate of recovery 90.3%.
Claims (7)
1. a kind of method for recycling aluminium ash valuable component, it is characterised in that the following steps are included:
(1) 300 meshes will be crossed after the grinding of aluminium ash, undersize material is as aluminium ash fine powder；
(2) aluminium ash fine powder is placed in the container with exhaust pipe and stirring, stirring is then opened into container plus after water, makes water
It is uniformly mixed with aluminium ash fine powder；
(3) under agitation by heating device to container heating and thermal insulation, the AlN in water and aluminium ash fine powder is made to react generation
NH3It is discharged by exhaust pipe；Material remaining in container is taken out, filtering obtains solid phase and liquid phase；Solid phase is desalination aluminium ash；
(4) washing desalination aluminium ash to washing lotion is neutrality, then dries removal and divide water, is then uniformly mixed with sulfuric acid solution, then use
Resistance furnace roasting, is made Al after furnace cooling2(SO4)3Clinker.
2. a kind of method for recycling aluminium ash valuable component according to claim 1, it is characterised in that in step (2), aluminium ash
The dosage of fine powder and water is 0.1~0.25g/mL by solid-to-liquid ratio.
3. a kind of method for recycling aluminium ash valuable component according to claim 1, it is characterised in that in step (3), heating
Temperature is 70~90 DEG C, 2~6h of soaking time.
4. a kind of method for recycling aluminium ash valuable component according to claim 1, it is characterised in that in step (3), NH3It is logical
Absorption by Hydrochloric Acid is used after crossing exhaust pipe discharge, ammonium chloride is made；The mass concentration 10~20% of hydrochloric acid.
5. a kind of method for recycling aluminium ash valuable component according to claim 1, it is characterised in that in step (3), obtain
Liquid phase be heated to 150~220 DEG C and be evaporated crystallization, the crystalline mixture containing chloride and fluoride is made.
6. a kind of method for recycling aluminium ash valuable component according to claim 1, it is characterised in that in step (4), sulfuric acid
The mass concentration 98% of solution, the dosage of desalination aluminium ash and sulfuric acid solution after washing drying are 0.4~2g/mL by solid-to-liquid ratio,
150~260 DEG C of maturing temperature, 2~4h of calcining time.
7. a kind of method for recycling aluminium ash valuable component according to claim 1, it is characterised in that the resolution ratio 98% of AlN
More than.
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