CN108384954A - The discarded method and reactor for being packed for aluminizer surfaces of aluminum is removed using microorganism - Google Patents
The discarded method and reactor for being packed for aluminizer surfaces of aluminum is removed using microorganism Download PDFInfo
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- CN108384954A CN108384954A CN201810184722.5A CN201810184722A CN108384954A CN 108384954 A CN108384954 A CN 108384954A CN 201810184722 A CN201810184722 A CN 201810184722A CN 108384954 A CN108384954 A CN 108384954A
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- 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
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- 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
- C22B21/0015—Obtaining aluminium by wet processes
- C22B21/0023—Obtaining aluminium by wet processes from waste materials
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
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- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
-
- 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
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- Manufacturing & Machinery (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of the discarded method and reactor for being packed for aluminizer surfaces of aluminum is removed using microorganism.The present invention, which will discard to be packed for being put into the reactor containing the culture medium for being vaccinated with thiobacillus ferrooxidans after aluminizer crushes, carries out dealuminzation.The beneficial effects of the present invention are：The present invention takes full advantage of the acidophilus characteristic of thiobacillus ferrooxidans and the characteristics of aluminium ion can largely exist in acid condition, using microorganism remove it is discarded be packed for aluminizer surfaces of aluminum, dealuminzation rate is high；The present invention has reactor design reasonable simultaneously, at low cost, the advantages such as environmental-friendly, is conducive to expand application of the microorganism in removing metallic aluminium field.
Description
Technical field
The present invention relates to solid waste resource recoveries and nonferrous metals recycling technical field, and in particular to a kind of to utilize micro- life
The discarded method and reactor for being packed for aluminizer surfaces of aluminum of object removing.
Background technology
Aluminizer has the features such as light weight, wearability is good, thermal stability is good, and easy processing shapes, oneself is widely used as electricity
The packaging material of sub- product.It constantly updates and regenerates with electronic product, it is also more and more to discard aluminizer.A13+It can influence plant
Absorption of the root system to nutrient, and precious metal ion can cause heavy metal pollution；Secondly, the degradation coefficient of plastics is small, needs to grow very much
Time could decompose totally, plastics easily cause soil hardening, influence plant absorption nutriment and moisture.Therefore, seeking one kind has
The discarded separation and recovery method for being packed for aluminizer and technique of effect are imperative.
Currently, being mainly the following for the disposal technology of discarded aluminizer：
（1）Physical separation：Physical separation is using the difference of the physical property of aluminium and plastics, e.g., according to the thermal expansion system of plastic-aluminum
Several difference makes aluminium and plastics detach according to the density difference of plastic-aluminum.
（2）Chemical Decomposition：Make aluminum-plastic separation using solvent.Generally mixed solvent is such as mixed by formic acid and dichloromethane
Conjunction is made, formic acid and ethyl alcohol are with volume ratio 4:1~1:4 mix.Chemical Decomposition needs the solvent and height using potential hazard
High chemical recovery equipment, in addition, it may also happen that reaction between reagent and polymer.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of novel to be packed for using microorganism removing is discarded
The method and reactor of aluminizer surfaces of aluminum.The processing method of the present invention is processing cost on the basis of physico-chemical process
It is relatively low, reactor design is reasonable, treatment effect is good, and secondary pollution is not will produce in removal process.The present invention is in the dealuminzation time
When being 6 days, dealuminzation rate can reach 85.24%；At 8 days, when dealuminzation rate can reach 93.86%, 10 days, dealuminzation rate can reach
94.93% 。
In the present invention, when being packed for aluminizer surfaces of aluminum with microorganism removing is discarded, the ferrous iron in culture solution is in bacterium
Under the action of be oxidized to ferric iron, pure aluminum is oxidized to aluminium ion by ferric iron again, and aluminium ion is in acid condition largely altogether
It deposits, and then realizes the removing of aluminium in aluminizer.Technical solution of the present invention is specifically described as follows.
The present invention provides a kind of method for being removed using microorganism and discarding and being packed for aluminizer surfaces of aluminum, and specific steps are such as
Under：
Step 1, the discarded aluminizer that is packed for is passed through into cracking and sorting, obtains metallic aluminium enrichment body of the grain size between 0.5 ~ 3mm；
Step 2, it is 20 ~ 40g/L according to solid-liquid mass volume ratio, by metallic aluminium enrichment body access by the acidophilus sulphur of acclimation
Bacillus strain, inoculum concentration are 8 ~ 12vol%, and at 29 ~ 31 DEG C of temperature, the rotating speed of 120 ~ 140 r/min, in the reactor
Dealuminzation 6 ~ 10 days；Wherein：When thiobacillus ferrooxidans' bacterial strain of acclimation is passed through in access, FeSO in culture solution4·7H2The additive amount of O
Initial pH for 40 ~ 80g/L, culture solution is 1.0 ~ 2.5；
Step 3, it after the completion of dealumination process, is separated by solid-liquid separation, obtains filtrate and filter residue, gained filtrate is extracted successively, is stripped
It takes and electrolytic process, obtains electrolytic aluminium.
In the present invention, in step 2, thiobacillus ferrooxidans' bacterial strain of acclimation is selected from Thiobacillus ferrooxidans
（Acidithiobacillus ferrooxidans）Or Thiobacillus thioxidans (Acidithiobacillus thiooxidans
Or one or both of thiobacillus ferrooxidans.
In the present invention, in step 2, the grain size of metal concentrate concentrates 0.5 ~ 1mm, and solid-liquid mass volume ratio is in culture solution
30~40g/L。
In the present invention, in step 2, FeSO in culture solution4·7H2The additive amount of O is 50 ~ 70g/L, the initial pH of culture solution
It is 1.0 ~ 1.5.
In the present invention, in step 2, in culture solution, solid-liquid mass volume ratio is 30 ~ 40g/L, FeSO4·7H2The addition of O
Amount is 60g/L, and the initial pH of culture solution is 1.0.
In the present invention, in step 2, reactor includes reactor body, feed inlet and liquid outlet；Wherein reactor body is
Horizontal cylindrical, surrounding sandwich establishment, electrical bar are uniformly distributed in interlayer, and temperature sensor, temperature are arranged in reactor
Sensor and electrical bar are separately connected electric cabinet；The centre position of reactor body is horizontally disposed with shaft, radially uniform in shaft
Stirring bar is set, and feed inlet is arranged in the top of reactor body, and bottom end is detachably connected by the upper end opening of pipeline and separator box
It connects, liquid outlet is arranged in separator box bottom end, and filter cloth is set to the position for being higher than liquid outlet in separator box.
The present invention also provides a kind of reactor that above-mentioned method uses, the reactor includes reactor body, charging
Mouth and liquid outlet；Wherein reactor body is horizontal cylindrical, and surrounding sandwich establishment, electrical bar is uniformly distributed in interlayer,
Temperature sensor is set in reactor, and temperature sensor and electrical bar are separately connected electric cabinet；The centre position of reactor body
Feed inlet is arranged in horizontally disposed shaft, radially uniform setting stirring bar in shaft, the top of reactor body, and bottom end passes through pipeline
It is detachably connected with the upper end opening of separator box, liquid outlet is arranged in separator box bottom end, and filter cloth, which is set in separator box, is higher than liquid
The position of mouth.
Compared to the prior art, the beneficial effects of the present invention are：
（1）This method reaction condition is mild, and processing cost is relatively low, reactor design is reasonable, and treatment effect is good, in removal process
It not will produce secondary pollution；
（2）The characteristics of present invention makes full use of the acidophilus characteristic of microorganism and aluminium ion that can largely exist in acid condition,
Efficiently separating for pure aluminum and plastics on aluminizer is realized under the conditions of good bacterial strain dealuminzation, it is limited to have expanded microorganism de-
Except useless case for electronic organizer loads onto the application of aluminium；
（3）Bioleaching reaction has the advantages such as simple for process, investment is small, environmentally friendly, can be that it is established in commercial Application
Practical basis；
（4）The device of the invention is in horizontal design, is conducive to the tangled up and knotted of flexible waste plastics in system, is mutually stacked together；
And then ensure that solution can be fully kept in contact with plastic grain, realize that microorganism is de- to the abundant leaching of surfaces of aluminum in aluminizer
It removes.
Description of the drawings
Fig. 1 is the process flow chart that the present invention removes electronic product aluminizer surfaces of aluminum of giving up using microorganism.
Fig. 2 is the structure of reactor schematic diagram of the present invention.
Figure label：1- reactor bodies, 2- interlayers, 3- shafts, 4- feed inlets, 5- electrical bars, 6- stirring rod, 7- chargings
Funnel, 8- filter clothes, 9- liquid outlets, 10- electric cabinets.
Specific implementation mode
The specific implementation mode of the present invention is further described below in conjunction with attached drawing.
Fig. 1 is the process flow diagram that the present invention removes metallic aluminium in aluminizer using microorganism in the reactor.It is existing
Technological process is described below in conjunction with attached drawing：
（1）Broken, the sorting of aluminizer
It will be crushed, sorted in aluminizer with water-cooled crusher, respectively obtained grain size and exist<0.5mm、 0.5~1.0mm、1.0
~2.0mm、2.0~3.0mm、>The metallic aluminium of 3.0mm is enriched with body.
（2）Acclimation is carried out to bacterial strain
The process of the domestication culture is the inoculum concentration with 8 ~ 12vol%, and A.f bacterium, A.t bacterium and thiobacillus ferrooxidans' mixed bacteria are connect
It plants to 9K, Starkey, 9K+Starkey（Volume ratio is 1:1）In fluid nutrient medium, and in 29 ~ 31 DEG C of temperature, 120 ~ 140
Domestication culture is carried out under the rotating speed of r/min in the reactor.At which when exponential phase, again with the inoculation of 8 ~ 12vol%
Amount is seeded in corresponding fresh culture, and is stepped up the additive amount of aluminizer；It repeats the above process, finally obtains pair
Al3+The high naturalized strain of tolerance preserves for use.
（3）The selection of bacterial strain
In FeSO4·7H2The additive amount of O is 40 ~ 80g/L, 0.5 ~ 3.0mm of size of grain size, solid-to-liquid ratio are 20 ~ 40g/L, training
Under conditions of the initial pH of nutrient solution is 1 ~ 2.5, A.f bacterium, A.t bacterium and thiobacillus ferrooxidans are mixed with the inoculum concentration of 8 ~ 12vol% respectively
Combined bacteria kind is seeded to 9K, Starkey, 9K+Starkey（Volume ratio is 1:1）In fluid nutrient medium.At a temperature of 29 ~ 31 DEG C,
Dealuminzation experiment is carried out under 120 ~ 140r/min rotating speeds in the reactor, three bacterial strain dealuminzation rates are measured after 6 ~ 10d.
（4）Bioleaching
By broken aluminizer access by the thiobacillus ferrooxidans of acclimation, the optimization of experimental condition is carried out in the reactor.
Explore FeSO4·7H2The initial pH of additive amount, particle size, liquid-solid ratio, culture solution, inoculum concentration, the cultivated days of O are de- to aluminizer
The influence of aluminium effect.And 6 ~ 10d, subtractive process are removed in the reactor at 29 ~ 31 DEG C of temperature, 120 ~ 140 r/min rotating speeds
PH, ORP in middle monitoring solution, metallic aluminium leaching rate with extraction time variation.
(5）Collect filtrate
Filtrate is collected in reactor liquid outlet, discharge port collects filter residue；Filtrate can carry out electrolytic recovery aluminium；Filter residue plastics can carry out
Waste plastics recovery recycles.
(6）Recycle electrolytic aluminium
Extracting and enriching carried out to the aluminium ion in filtrate with p204 extractants, then gained loaded aluminium extraction organic phase pass through it is excellent
It selects the sulfuric acid of a concentration of 180g/L to be stripped, then gained richness aluminum solutions is subjected to electrolysis and finally obtain the gold that purity is 99%
Belong to aluminium.Wherein electrolysis when current density 200 ~ 250A/m2, voltage is 2 ~ 2.2V, and anode plate is lead alloy plate, and cathode plate is not
Become rusty steel plate.
The present invention is further elaborated with reference to embodiment.
In embodiment, the structure of reactor that microbial reaction uses is as shown in Figure 2.Reactor include reactor body 1, into
Material mouth 4 and liquid outlet 9；Reactor body 1 is horizontal cylindrical, and surrounding sandwich establishment 2, electrical bar 5 is uniformly distributed in interlayer 2
In, temperature sensor is set in reactor body 1, and temperature sensor and electrical bar 5 are separately connected electric cabinet 10；Reactor body
1 centre position is horizontally disposed with shaft 3, and radially uniform setting stirring bar 6 in shaft 3, the top setting of reactor body 1 is fed
The upper end opening of mouth 4, bottom end and separator box is detachably connected, and liquid outlet 9 is arranged in separator box bottom end, and filter cloth 8 is set to separator box
The interior position higher than liquid outlet 8.Waste plastics is finally collected on filter cloth, and is taken out from the upper end opening of separator box.
Embodiment 1
Prepare 9K culture mediums, component content：FeSO4·7H2O is respectively 60g/L, (NH4)2SO4For 3g/L, K2HPO4For
0.5g/L, KCl 0.1g/L, MgSO4·7H2O is 0.5g/L, Ca (NO3)2 For 0.01g/L, remaining is deionized water.Useless electricity
The ingredient of sub- product In Aluminium Foil Packing plastics is PAE/Al/PE/PA, and after chloroazotic acid resolution, the content of aluminium is in the double-deck aluminizer
186.24mg/g.Useless electronic product In Aluminium Foil Packing plastics particle size is 0.5-1.0mm, solid-to-liquid ratio 40g/L, inoculum concentration are
10%, the initial pH of culture solution is 1.5, when cultivating 6d in the shaken cultivation case at 30 DEG C of temperature, 130 r/min rotating speeds, dealuminzation
Rate reaches 70.95%.When 8d, dealuminzation rate reaches 83.33%.When 10d, dealuminzation rate reaches 85.43%.
Embodiment 2
Prepare 9K culture mediums, component content：FeSO4·7H2O is 40g/L, (NH4)2SO4For 3g/L, K2HPO4For
0.5g/L, KCl 0.1g/L, MgSO4·7H2O is 0.5g/L, Ca (NO3)2 For 0.01g/L, remaining is deionized water.Useless electricity
The ingredient of sub- product In Aluminium Foil Packing plastics is PAE/Al/PE/PA, and after chloroazotic acid resolution, the content of aluminium is in the double-deck aluminizer
186.24mg/g.Useless electronic product In Aluminium Foil Packing plastics particle size is 0.5-1.0mm, solid-to-liquid ratio 30g/L, culture solution are initial
PH is 1.5, when cultivating 6d in inoculum concentration 10%, the shaken cultivation case at 30 DEG C of temperature, 130 r/min rotating speeds, dealuminzation rate
Reach 68.92%.When 8d, dealuminzation rate reaches 82.44%.When 10d, dealuminzation rate reaches 86.19%.
Embodiment 3
Prepare 9K culture mediums, component content：FeSO4·7H2O is respectively 60g/L, (NH4)2SO4For 3g/L, K2HPO4For
0.5g/L, KCl 0.1g/L, MgSO4·7H2O is 0.5g/L, Ca (NO3)2 For 0.01g/L, remaining is deionized water.Useless electricity
The ingredient of sub- product In Aluminium Foil Packing plastics is PAE/Al/PE/PA, and after chloroazotic acid resolution, the content of aluminium is in the double-deck aluminizer
186.24mg/g.Useless electronic product In Aluminium Foil Packing plastics particle size is 0.5-1.0mm, solid-to-liquid ratio 30g/L, inoculum concentration are
When cultivating 6d when 10%, the initial pH of culture solution is 1, in the shaken cultivation case at 30 DEG C of temperature, 130 r/min rotating speeds, dealuminzation
Rate reaches 82.29%.When 8d, dealuminzation rate reaches 93.86%.When 10d, dealuminzation rate reaches 94.93%.
Embodiment 4
The initial pH of culture solution is 0.5, and other conditions are the same as embodiment 3.
The results show that when 6d, dealuminzation rate reaches 38.20%.When 8d, dealuminzation rate reaches 41.56%.When 10d, take off
Aluminium rate reaches 41.58%.
Embodiment 5
The initial pH of culture solution is 3, and other conditions are the same as embodiment 3.
The results show that when 6d, dealuminzation rate reaches 32.51%.When 8d, dealuminzation rate reaches 37.62%.When 10d, dealuminzation
Rate reaches 37.99%.
Claims (7)
1. a kind of removing the discarded method for being packed for aluminizer surfaces of aluminum using microorganism, which is characterized in that be as follows：
Step 1, the discarded aluminizer that is packed for is passed through into cracking and sorting, obtains metallic aluminium enrichment body of the grain size between 0.5 ~ 3mm；
Step 2, it is 20 ~ 40g/L according to solid-liquid mass volume ratio, by metallic aluminium enrichment body access by the acidophilus sulphur of acclimation
Bacillus strain, inoculum concentration are 8 ~ 12vol%, and at 29 ~ 31 DEG C of temperature, the rotating speed of 120 ~ 140 r/min, in the reactor
Dealuminzation 6 ~ 10 days；Wherein：When thiobacillus ferrooxidans' bacterial strain of acclimation is passed through in access, FeSO in culture solution4·7H2The additive amount of O
Initial pH for 40 ~ 80g/L, culture solution is 1.0 ~ 2.5；
Step 3, it after the completion of dealumination process, is separated by solid-liquid separation, obtains filtrate and filter residue, gained filtrate is extracted successively, is stripped
It takes and electrolytic process, obtains electrolytic aluminium.
2. according to the method described in claim 1, it is characterized in that, in step 2, thiobacillus ferrooxidans' bacterial strain of acclimation is selected from
Thiobacillus ferrooxidans（Acidithiobacillus ferrooxidans）Or Thiobacillus thioxidans
(Acidithiobacillus thiooxidansOne or both of).
3. according to the method described in claim 1, it is characterized in that, in step 2, the grain size of metal concentrate concentrates 0.5 ~ 1mm,
Solid-liquid mass volume ratio is 30 ~ 40g/L in culture solution.
4. according to the method described in claim 1, it is characterized in that, in step 2, FeSO in culture solution4·7H2The additive amount of O is
The initial pH of 50 ~ 70g/L, culture solution are 1.0 ~ 1.5.
5. according to the method described in claim 1, it is characterized in that, in step 2, in culture solution, solid-liquid mass volume ratio is 30 ~
40g/L, FeSO4·7H2The additive amount of O is 60g/L, and the initial pH of culture solution is 1.0.
6. according to the method described in claim 1, it is characterized in that, in step 2, reactor include reactor body,
Feed inlet, discharge port and liquid outlet；Wherein reactor body is horizontal cylindrical, and surrounding sandwich establishment, electrical bar is equal
It is even to be distributed in interlayer, temperature sensor is set in reactor, and temperature sensor and electrical bar are separately connected electric cabinet；Reactor
The centre position of main body is horizontally disposed with shaft, radially uniform setting stirring bar in shaft, the top setting charging of reactor body
Mouthful, bottom end is detachably connected by the upper end opening of pipeline and separator box, and separator box bottom end is arranged liquid outlet, and filter cloth is set to point
From the position for being higher than liquid outlet in case.
7. the reactor that a kind of method according to claim 11 uses, which is characterized in that the reactor includes reactor
Main body, feed inlet, discharge port and liquid outlet；Wherein reactor body is horizontal cylindrical, surrounding sandwich establishment, electric heating
Stick is uniformly distributed in interlayer, temperature sensor is arranged in reactor, temperature sensor and electrical bar are separately connected electric cabinet；Instead
The centre position of device main body is answered to be horizontally disposed with shaft, radially uniform setting stirring bar in shaft, the top setting of reactor body
Feed inlet, bottom end are detachably connected by the upper end opening of pipeline and separator box, and liquid outlet, filter cloth setting is arranged in separator box bottom end
In the position for being higher than liquid outlet in separator box.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810184722.5A CN108384954A (en) | 2018-03-07 | 2018-03-07 | The discarded method and reactor for being packed for aluminizer surfaces of aluminum is removed using microorganism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810184722.5A CN108384954A (en) | 2018-03-07 | 2018-03-07 | The discarded method and reactor for being packed for aluminizer surfaces of aluminum is removed using microorganism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023170572A1 (en) * | 2022-03-10 | 2023-09-14 | Coalchry Green S.R.L. | Process for separating materials constituting a composite multilayer using acidophilic bacteria |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023170572A1 (en) * | 2022-03-10 | 2023-09-14 | Coalchry Green S.R.L. | Process for separating materials constituting a composite multilayer using acidophilic bacteria |
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Application publication date: 20180810 |