CN109261688A - A kind of recovery processing technique of discarded aluminum foil composite paper - Google Patents
A kind of recovery processing technique of discarded aluminum foil composite paper Download PDFInfo
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- CN109261688A CN109261688A CN201811008724.5A CN201811008724A CN109261688A CN 109261688 A CN109261688 A CN 109261688A CN 201811008724 A CN201811008724 A CN 201811008724A CN 109261688 A CN109261688 A CN 109261688A
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- China
- Prior art keywords
- paper
- aluminium
- aluminum foil
- square
- foil
- Prior art date
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 80
- 239000011888 foil Substances 0.000 title claims abstract description 46
- 238000012545 processing Methods 0.000 title claims abstract description 25
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 19
- 239000005030 aluminium foil Substances 0.000 claims abstract description 91
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 41
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004411 aluminium Substances 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims abstract description 33
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 32
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 230000018044 dehydration Effects 0.000 claims abstract description 17
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 17
- 238000001125 extrusion Methods 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 17
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000000746 purification Methods 0.000 claims abstract description 11
- 230000008014 freezing Effects 0.000 claims abstract description 10
- 238000007710 freezing Methods 0.000 claims abstract description 10
- 238000004042 decolorization Methods 0.000 claims abstract description 7
- 238000001291 vacuum drying Methods 0.000 claims abstract description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 36
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 27
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 5
- 238000010025 steaming Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 9
- 239000012535 impurity Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 238000009776 industrial production Methods 0.000 description 6
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003196 chaotropic effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000011973 solid acid Substances 0.000 description 2
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 244000131522 Citrus pyriformis Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical class ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0038—Obtaining aluminium by other processes
- C22B21/0069—Obtaining aluminium by other processes from scrap, skimmings or any secondary source aluminium, e.g. recovery of alloy constituents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of recovery processing technique of discarded aluminum foil composite paper, include the following steps 1. square that the discarded aluminium-foil paper that collection obtains is ground into blocky specification；2. square is placed in refrigerator-freezer freezing；It is heated and softened 3. the square after freezing is sent into reaction kettle；4. separating liquid, which is added, in the square after softening carries out first separation, isolated paper pulp and aluminum foil material；5. paper pulp and aluminum foil material are cleaned；6. pulp processing: being used for papermaking after paper pulp is carried out extrusion dehydration, defibrination, decolorization；7. grinding: will be ground to obtain aluminium foil particle after aluminum foil material extrusion dehydration；8. aluminium foil particle is reacted with hydrochloric acid solution, aluminium powder is obtained；9. aluminium powder purifies: aluminium powder being sent into purification system, cleaning aluminium powder can be obtained through removal of impurities, concentration, vacuum drying.Operating process of the invention is simple, separative efficiency is high, product quality after the recovery is purer, and the process entirely produced is green and pollution-free, has high economic value and energy-saving and emission-reduction meaning.
Description
Technical field
The invention belongs to resource reutilization technical fields, and in particular to a kind of recovery processing work of discarded aluminum foil composite paper
Skill.
Background technique
Aluminum foil composite paper is a kind of material being combined by aluminium foil and paper, has moisture-proof, airtight, shading, corrosion-resistant, guarantor
The advantages that fragrant, non-toxic and tasteless, exquisite appearance, it is widely used in the inner packing of the products such as food, tobacco, the life of aluminum foil composite paper
Produce process mainly include gluing, it is compound, drying, winding, eliminate stress and cutting process, aluminum foil composite paper in process of production and
A large amount of leftover pieces fine crushing can be generated during being packed using aluminium-foil paper, these leftover pieces are generally simply discarded, not only
The waste of resource, also pollution environment are caused, sustainable development is unfavorable for.Aluminium foil in aluminum foil composite paper is using good former material
Material has very high recovery value.The recycling of aluminum foil composite paper not only contributes to alleviation, and currently there is an urgent need to the environment of improvement to ask
Topic, and be the important measure of coping resources crisis, be conducive to the recycling of non-renewable resources.However, existing aluminium foil returns
Receiving mostly is using high-temperature combustion method, and high-temp combustion pollutes the environment first is that exhaust gas can be generated, second is that wasting some treasured
Expensive resource.Therefore, it develops that a kind of operating process is simple, separative efficiency is high, the rate of recovery is high and can be reduced organic solvent use
The recovery processing technique of measuring, reduce environmental pollution, reducing the discarded aluminum foil composite paper of cost is desirability.
Summary of the invention
In order to solve the problems, such as background technique, the purpose of the present invention is to provide a kind of operating process simply, divides
Discarded aluminum foil composite paper that is high from high-efficient, the rate of recovery and can be reduced consumption of organic solvent, the cost that reduces environmental pollution, reduces
Recovery processing technique.
A kind of recovery processing technique of discarded aluminum foil composite paper of the present invention, comprising the following steps:
1. crushing: will collect and be crushed in obtained discarded aluminium-foil paper feeding high speed disintegrator, and be ground into the side of blocky specification
Block；
2. freezing: by step, 1. square obtained is placed in refrigerator-freezer, -15~-5 DEG C at a temperature of freeze 2~5h；
3. softening: the square after 2. step freezes being sent in reaction kettle, steam is then passed through in reaction kettle, utilizes steaming
Vapour carries out 30~60min of heating to square, and the temperature of steam is 100~120 DEG C；
4. first separation: release agent and water being first configured to the separating liquid that temperature is 60~80 DEG C, mass concentration is 5~10%, so
The square after 3. step softens is put into agitator afterwards, and separating liquid is added in agitator, later 200~
120~200min is stirred to react to it under the revolving speed of 300r/min, separates aluminium foil and paper, swims on separating liquid surface and is
Floating material paper pulp, the sediment for being deposited in separating liquid bottom is aluminum foil material, and recycles release agent；
5. cleaning: the paper pulp 4. obtained through step and aluminum foil material are respectively rinsed 2~3 times respectively with clear water；
6. pulp processing: the paper pulp after 5. step is cleaned being sent into double network pressure pulp grinders and carries out extrusion dehydration, after extrusion dehydration
Paper pulp after defibrination, decolorization be used for papermaking；
7. grinding: the aluminum foil material after 5. step is cleaned being sent into screw extruder after extrusion dehydration, high speed is placed into and grinds
It is ground in grinding machine with the speed of 500~800r/min, crosses 80~100 meshes, obtain aluminium foil particle；
8. secondary separation: by step 7. aluminium foil particle merging agitator obtained, and be added in agitator temperature be 30~
50 DEG C, the hydrochloric acid solution that mass concentration is 1~3%, it is stirred to react 300 to it with the speed of 100~200r/min later~
The mass ratio of 500min, the aluminium foil particle and hydrochloric acid solution is 1kg:(3~6) L, after the completion of being stirred to react, aluminium powder sinks, and
The floating material on hydrochloric acid solution surface is swum in after over cleaning, is used for papermaking together with the paper pulp 6. obtained in step；
9. aluminium powder purifies: by step, 8. aluminium powder feeding purification system obtained goes to clean in purification system by cyclonic separation
Finally cleaning aluminium powder can be obtained by vacuum drying in matter, spiral concentration extraction aluminium powder.
The invention mainly comprises aluminium-foil paper separation, pulp processing, the processes of aluminium foil processing and secondary aluminium, in aluminium foil and paper point
From during, the separating liquid of independent research is intervened, it will be apparent that the dissolution for accelerating adhesive between compound tense aluminium foil and paper adds
The speed of speed aluminium-foil paper separation, improves the rate of recovery of aluminium foil and paper pulp, and time and speed by reasonably controlling stirring
Degree, can effectively ensure that the quality of paper pulp and aluminium foil after separation, paper pulp after separation by cleaning, being dehydrated, defibrination and
It is used for papermaking after decolorization, further improves the economic value of discarded aluminium-foil paper, the aluminum foil material after separation utilizes salt
Acid solution, sodium hydroxide solution carry out dissolution reaction, so that the remaining paper of aluminium foil surface is carried out secondary separation again, by secondary separation
Afterwards, make the separation of aluminium-foil paper more thorough, to improve the rate of recovery of aluminium foil, keep the quality of aluminium oxide after the recovery further
It improves.Operating process of the invention is simple, separative efficiency is high, product quality after the recovery is purer, and the process entirely produced is green
Color is environment friendly and pollution-free, and the solvent after each step use is recyclable to be recycled, and not only avoids the random exhaust emission environment of solvent,
And the utilization rate of solvent is higher, is conducive to Reducing Cost in Enterprises, paper pulp after the recovery is for producing recycled paper, aluminium after the recovery
Foil can produce aluminum products, and aluminium oxide and paper obtained all have higher recovery value, really realize aluminium-foil paper
Recycling and reusing has high economic value and energy-saving and emission-reduction meaning, use easy to spread.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but the present invention is limited in any way,
Based on present invention teach that it is made it is any transform or replace, all belong to the scope of protection of the present invention.
Embodiment 1:
A kind of recovery processing technique of discarded aluminum foil composite paper described in the present embodiment 1, the following steps are included:
1. crushing: will collect and be crushed in obtained discarded aluminium-foil paper feeding high speed disintegrator, and be ground into the side of blocky specification
Block, the blocky area of the square are 50cm2；
2. freezing: by step, 1. square obtained is placed in refrigerator-freezer, -15 DEG C at a temperature of freeze 2h, can be changed by freezing
Become sticky the physical property of the adhesive being attached between aluminium foil and paper；
3. softening: the square after 2. step freezes being sent in reaction kettle, steam is then passed through in reaction kettle, utilizes steaming
Vapour carries out heating 30min to square, and the temperature of steam is 100 DEG C, can in advance will be between aluminium foil and paper by heating and softening
Adhesive is softened, and aluminium foil and paper is allowed to remove in advance；
4. first separation: release agent and water are first configured to the separating liquid that temperature is 60 DEG C, mass concentration is 5%, it then will be through step
Suddenly the square after 3. softening is put into agitator, and separating liquid is added in agitator, later under the revolving speed of 200r/min
120min is stirred to react to it, separates aluminium foil and paper, the floating material swum on separating liquid surface is paper pulp, is deposited in separation
The sediment of liquid bottom is aluminum foil material, and recycles release agent, wherein the lemon that the release agent is 50% by percent by volume
Acid, 30% methylene chloride and 20% ether, under the action of separating liquid, aluminium-foil paper and release agent are completely attached to, and are chemically reacted,
Aluminium foil and paper are separated, due to the temperature of separating liquid, the difference of solid-liquid ratio, the time for causing aluminium foil and paper to separate is not also identical,
Preferably, the square and separating liquid amount ratio are 1Kg:5L, if solid-liquid ratio is too low, separating liquid is reduced and aluminium foil paper material is more,
Aluminium-foil paper complete wetting cannot be influenced its separating effect by separating liquid, if solid-liquid ratio is excessively high, although good separating effect, and cost
It increases, is unfavorable for industrial production, therefore suitable solid-liquid ratio is to separate more crucial one of the factor of aluminium foil paper material, the present embodiment
The good separating effect, at low cost under the solid-liquid ratio is conducive to industrial production, in addition, the release agent in separating liquid selects citric acid, two
As raw material, citric acid is a kind of common natural solid acid for chloromethanes and ether, and citric acid can dissolve in water, and different
Hydrogen ion is ionized out to degree, keeps solution weakly acidic, the hydrogen ion ionized out has the function of corrosive aluminum foil, to reach aluminium
The purpose of foil and paper separation, methylene chloride can first be swollen aluminium foil and paper, expand the intermolecular distance between paper, ether
As a kind of active catalyst, the separating rate of aluminium foil and paper can be accelerated；
5. cleaning: the paper pulp 4. obtained through step and aluminum foil material are respectively rinsed 2 times respectively with clear water；
6. pulp processing: the paper pulp after 5. step is cleaned being sent into double network pressure pulp grinders and carries out extrusion dehydration, after extrusion dehydration
Paper pulp after defibrination, decolorization be used for papermaking；
7. grinding: the aluminum foil material after 5. step is cleaned being sent into screw extruder after extrusion dehydration, high speed is placed into and grinds
It is ground in grinding machine with the speed of 500r/min, crosses 80 meshes, obtain aluminium foil particle；
8. secondary separation: by step 7. aluminium foil particle merging agitator obtained, and be added in agitator temperature be 30 DEG C,
The hydrochloric acid solution that mass concentration is 1% is stirred to react 300min to it later with the speed of 100r/min, the aluminium foil particle with
The mass ratio of hydrochloric acid solution is 1kg:3L, and after the completion of being stirred to react, aluminium powder sinks, and swims in the floating material on hydrochloric acid solution surface
After over cleaning, it is used for papermaking together with the paper pulp 6. obtained in step, using the hydrochloric acid solution of reasonable temperature and concentration to grinding
Aluminum foil material after mill is separated, and aluminium foil and paper can be completely separated；
9. aluminium powder purifies: by step, 8. aluminium powder feeding purification system obtained goes to clean in purification system by cyclonic separation
Finally cleaning aluminium powder can be obtained by vacuum drying in matter, spiral concentration extraction aluminium powder.
It is applicant by largely repeatedly practising and testing for above-mentioned processing step and technical parameter, this
Invention can be realized efficiently separating for aluminium foil and paper, and the separation of aluminium foil and paper can reach 95.3% or more, and the loss late of paper can be controlled
System is 18.6% or so, and the loss late of aluminium foil can control 12.5% or so, and the purity of aluminium powder obtained can reach 90%, entirely
Production process is simply easy to operate, and entire production process is safe and environment-friendly.
Embodiment 2
A kind of recovery processing technique of discarded aluminum foil composite paper described in the present embodiment 2, comprising the following steps:
1. crushing: will collect and be crushed in obtained discarded aluminium-foil paper feeding high speed disintegrator, and be ground into the side of blocky specification
Block, the blocky area of the square are 80cm2；
2. freezing: by step, 1. square obtained is placed in refrigerator-freezer, -10 DEG C at a temperature of freeze 3.5h, can be with by freezing
Change the physical property for the adhesive being adhered between aluminium foil and paper；
3. softening: the square after 2. step freezes being sent in reaction kettle, steam is then passed through in reaction kettle, utilizes steaming
Vapour carries out heating 45min to square, and the temperature of steam is 110 DEG C, can in advance will be between aluminium foil and paper by heating and softening
Adhesive is softened, and aluminium foil and paper is allowed to remove in advance；
4. first separation: release agent and water are first configured to the separating liquid that temperature is 70 DEG C, mass concentration is 8%, it then will be through step
Suddenly the square after 3. softening is put into agitator, and separating liquid is added in agitator, the square and separating liquid amount ratio
To be stirred to react 160min to it under the revolving speed of 250r/min after 1Kg:8L, aluminium foil and paper are separated, separating liquid is swum in
Floating material on surface is paper pulp, and the sediment for being deposited in separating liquid bottom is aluminum foil material, and recycles release agent, wherein institute
Citric acid, 25% methylene chloride and 10% ether that release agent is 65% by percent by volume are stated, under the action of separating liquid, aluminium foil
Paper and release agent completely attach to, and chemically react, and aluminium foil and paper are separated, due to the temperature of separating liquid, the difference of solid-liquid ratio,
The time for causing aluminium foil and paper to separate is not also identical, it is preferable that the square is 1Kg:5L with separating liquid amount ratio, if solid-liquid ratio
Too low, separating liquid is reduced and aluminium foil paper material is more, and aluminium-foil paper complete wetting cannot be influenced its separating effect by separating liquid, if material
Liquor ratio is excessively high, although good separating effect, cost is increased, and is unfavorable for industrial production, therefore suitable solid-liquid ratio is separation aluminium-foil paper
More crucial one of the factor of material, the present embodiment good separating effect, at low cost under the solid-liquid ratio, is conducive to industrial production, separately
Outside, release agent in separating liquid selects citric acid, methylene chloride and ether as raw material, and citric acid is a kind of common natural consolidates
Body acid, citric acid can dissolve in water, and ionize out hydrogen ion to some extent, keep solution weakly acidic, the hydrogen ionized out
Ion has the function of corrosive aluminum foil, to achieve the purpose that aluminium foil and paper separation, methylene chloride can first to aluminium foil and paper into
Row swelling, expands the intermolecular distance between paper, and ether can accelerate the separation speed of aluminium foil and paper as a kind of active catalyst
Degree；
5. cleaning: the paper pulp 4. obtained through step and aluminum foil material are respectively rinsed 3 times respectively with clear water；
6. pulp processing: the paper pulp after 5. step is cleaned being sent into double network pressure pulp grinders and carries out extrusion dehydration, after extrusion dehydration
Paper pulp after defibrination, decolorization be used for papermaking；
7. grinding: the aluminum foil material after 5. step is cleaned being sent into screw extruder after extrusion dehydration, high speed is placed into and grinds
It is ground in grinding machine with the speed of 650r/min, crosses 90 meshes, obtain aluminium foil particle；
8. secondary separation: by step 7. aluminium foil particle merging agitator obtained, and be added in agitator temperature be 40 DEG C,
The hydrochloric acid solution that mass concentration is 2% is stirred to react 400min to it later with the speed of 150r/min, the aluminium foil particle with
The mass ratio of hydrochloric acid solution is 1kg:4.5L, and after the completion of being stirred to react, aluminium powder sinks, and swims in the floating on hydrochloric acid solution surface
Object is used for papermaking together with the paper pulp 6. obtained in step after over cleaning, utilizes the hydrochloric acid solution pair of reasonable temperature and concentration
Aluminum foil material after grinding is separated, and aluminium foil and paper can be completely separated；
9. aluminium powder purifies: by step, 8. aluminium powder feeding purification system obtained goes to clean in purification system by cyclonic separation
Finally cleaning aluminium powder can be obtained by vacuum drying in matter, spiral concentration extraction aluminium powder.
It is applicant by largely repeatedly practising and testing for above-mentioned processing step and technical parameter, this
Invention can be realized efficiently separating for aluminium foil and paper, and the separation of aluminium foil and paper can reach 97.6% or more, and the loss late of paper can be controlled
15.4% or so, the loss late of aluminium foil can control 11.8% or so system, and the purity of aluminium powder obtained can reach 94.6%, whole
A production process is simply easy to operate, and entire production process is safe and environment-friendly.
Embodiment 3:
A kind of recovery processing technique of discarded aluminum foil composite paper described in the present embodiment 3, comprising the following steps:
1. crushing: will collect and be crushed in obtained discarded aluminium-foil paper feeding high speed disintegrator, and be ground into the side of blocky specification
Block, the blocky area of the square are 100cm2；
2. freezing: by step, 1. square obtained is placed in refrigerator-freezer, -5 DEG C at a temperature of freeze 5h, can change by freezing
It is adhered to the physical property of the adhesive between aluminium foil and paper；
3. softening: the square after 2. step freezes being sent in reaction kettle, steam is then passed through in reaction kettle, utilizes steaming
Vapour carries out heating 60min to square, and the temperature of steam is 120 DEG C, can in advance will be between aluminium foil and paper by heating and softening
Adhesive is softened, and aluminium foil and paper is allowed to remove in advance；
4. first separation: release agent and water are first configured to the separating liquid that temperature is 80 DEG C, mass concentration is 10%, it then will be through
Square 3. step softens after is put into agitator, and separating liquid is added in agitator, the square and separating liquid dosage
Than being stirred to react 200min to it under the revolving speed of 300r/min later for 1Kg:10L, aluminium foil and paper are separated, swum in point
Floating material on chaotropic surface is paper pulp, and the sediment for being deposited in separating liquid bottom is aluminum foil material, and recycles release agent, is being divided
Under the action of chaotropic, aluminium-foil paper and release agent are completely attached to, and chemically react, and aluminium foil and paper are separated, due to separating liquid
Temperature, the difference of solid-liquid ratio, the time for causing aluminium foil and paper to separate is not also identical, it is preferable that the square and separating liquid dosage
Than for 1Kg:5L, if solid-liquid ratio is too low, separating liquid is reduced and aluminium foil paper material is more, separating liquid cannot by aluminium-foil paper complete wetting,
Its separating effect is influenced, if solid-liquid ratio is excessively high, although good separating effect, cost is increased, it is unfavorable for industrial production, thus it is suitable
Solid-liquid ratio is to separate more crucial one of the factor of aluminium foil paper material, the present embodiment good separating effect, cost under the solid-liquid ratio
It is low, it is conducive to industrial production, in addition, the release agent in separating liquid selects citric acid, methylene chloride and ether as raw material, citric acid
It is a kind of common natural solid acid, citric acid can dissolve in water, and ionize out hydrogen ion to some extent, make the solution be in
Faintly acid, the hydrogen ion ionized out have the function of corrosive aluminum foil, to achieve the purpose that aluminium foil and paper separation, methylene chloride can
To be first swollen to aluminium foil and paper, expand the intermolecular distance between paper, ether can be accelerated as a kind of active catalyst
The separating rate of aluminium foil and paper；
5. cleaning: the paper pulp 4. obtained through step and aluminum foil material respectively being rinsed 3 times respectively with clear water, wherein the release agent
Citric acid, 10% methylene chloride and 10% ether for being 80% by percent by volume,；
6. pulp processing: the paper pulp after 5. step is cleaned being sent into double network pressure pulp grinders and carries out extrusion dehydration, after extrusion dehydration
Paper pulp after defibrination, decolorization be used for papermaking；
7. grinding: the aluminum foil material after 5. step is cleaned being sent into screw extruder after extrusion dehydration, high speed is placed into and grinds
It is ground, is sieved with 100 mesh sieve with the speed of 800r/min in grinding machine, obtain aluminium foil particle；
8. secondary separation: by step 7. aluminium foil particle merging agitator obtained, and be added in agitator temperature be 50 DEG C,
The hydrochloric acid solution that mass concentration is 3% is stirred to react 500min to it later with the speed of 200r/min, the aluminium foil particle with
The mass ratio of hydrochloric acid solution is 1kg:6L, and after the completion of being stirred to react, aluminium powder sinks, and swims in the floating material on hydrochloric acid solution surface
After over cleaning, it is used for papermaking together with the paper pulp 6. obtained in step, using the hydrochloric acid solution of reasonable temperature and concentration to grinding
Aluminum foil material after mill is separated, and aluminium foil and paper can be completely separated；
9. aluminium powder purifies: by step, 8. aluminium powder feeding purification system obtained goes to clean in purification system by cyclonic separation
Finally cleaning aluminium powder can be obtained by vacuum drying in matter, spiral concentration extraction aluminium powder.
It is applicant by largely repeatedly practising and testing for above-mentioned processing step and technical parameter, this
Invention can be realized efficiently separating for aluminium foil and paper, and the separation of aluminium foil and paper can reach 95.8% or more, and the loss late of paper can be controlled
17.2% or so, the loss late of aluminium foil can control 14.7% or so system, and the purity of aluminium powder obtained can reach 92.5%, whole
A production process is simply easy to operate, and entire production process is safe and environment-friendly.
Claims (4)
1. a kind of recovery processing technique of discarded aluminum foil composite paper, which comprises the following steps:
1. crushing: will collect and be crushed in obtained discarded aluminium-foil paper feeding high speed disintegrator, and be ground into the side of blocky specification
Block；
2. freezing: by step, 1. square obtained is placed in refrigerator-freezer, -15~-5 DEG C at a temperature of freeze 2~5h；
3. softening: the square after 2. step freezes being sent in reaction kettle, steam is then passed through in reaction kettle, utilizes steaming
Vapour carries out 30~60min of heating to square, and the temperature of steam is 100~120 DEG C；
4. first separation: release agent and water being first configured to the separating liquid that temperature is 60~80 DEG C, mass concentration is 5~10%, so
The square after 3. step softens is put into agitator afterwards, and separating liquid is added in agitator, later 200~
120~200min is stirred to react to it under the revolving speed of 300r/min, separates aluminium foil and paper, swims on separating liquid surface and is
Floating material paper pulp, the sediment for being deposited in separating liquid bottom is aluminum foil material, and recycles release agent；
5. cleaning: the paper pulp 4. obtained through step and aluminum foil material are respectively rinsed 2~3 times respectively with clear water；
6. pulp processing: the paper pulp after 5. step is cleaned being sent into double network pressure pulp grinders and carries out extrusion dehydration, after extrusion dehydration
Paper pulp after defibrination, decolorization be used for papermaking；
7. grinding: the aluminum foil material after 5. step is cleaned being sent into screw extruder after extrusion dehydration, high speed is placed into and grinds
It is ground in grinding machine with the speed of 500~800r/min, crosses 80~100 meshes, obtain aluminium foil particle；
8. secondary separation: by step 7. aluminium foil particle merging agitator obtained, and be added in agitator temperature be 30~
50 DEG C, the hydrochloric acid solution that mass concentration is 1~3%, it is stirred to react 300 to it with the speed of 100~200r/min later~
The mass ratio of 500min, the aluminium foil particle and hydrochloric acid solution is 1kg:(3~6) L, after the completion of being stirred to react, aluminium powder sinks, and
The floating material on hydrochloric acid solution surface is swum in after over cleaning, is used for papermaking together with the paper pulp 6. obtained in step；
9. aluminium powder purifies: by step, 8. aluminium powder feeding purification system obtained goes to clean in purification system by cyclonic separation
Finally cleaning aluminium powder can be obtained by vacuum drying in matter, spiral concentration extraction aluminium powder.
2. a kind of recovery processing technique of discarded aluminum foil composite paper according to claim 1, it is characterised in that: step 1.
In, the blocky area of the square is 50~100cm2。
3. a kind of recovery processing technique of discarded aluminum foil composite paper according to claim 1, it is characterised in that: step 4.
In, the square and separating liquid amount ratio are 1Kg:(5~10) L.
4. a kind of recovery processing technique of discarded aluminum foil composite paper according to claim 1, it is characterised in that: step 4.
In, the release agent includes citric acid, 10~30% methylene chloride and 5~20% ether that percent by volume is 50~80%.
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| CN114229228A (en) * | 2021-12-30 | 2022-03-25 | 滁州卷烟材料厂 | Novel aluminum foil paper for cigarette based on hot melt adhesive |
| CN115430692A (en) * | 2022-09-03 | 2022-12-06 | 宁夏大学 | Novel method for separating and recycling retired photovoltaic module |
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