CN106011484B - A kind of waste printed circuit board precious metal recovery device based on production cyanogen biofilm reactor - Google Patents
A kind of waste printed circuit board precious metal recovery device based on production cyanogen biofilm reactor Download PDFInfo
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- CN106011484B CN106011484B CN201610539891.7A CN201610539891A CN106011484B CN 106011484 B CN106011484 B CN 106011484B CN 201610539891 A CN201610539891 A CN 201610539891A CN 106011484 B CN106011484 B CN 106011484B
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- Prior art keywords
- biofilm reactor
- culture medium
- airlift loop
- reactor
- pump
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Classifications
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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
- C22B7/007—Wet processes by acid leaching
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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
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
-
- 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
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
-
- 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
-
- 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
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
- C22B3/46—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
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- 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
Abstract
The present invention relates to a kind of waste printed circuit board precious metal recovery devices based on production cyanogen biofilm reactor, including culture medium storage tank, airlift loop biofilm reactor, air supply system, sampling device, electric cabinet, metal ion online monitoring system and control system, contain biofilm carrier in airlift loop biofilm reactor, culture medium storage tank is pumped by culture medium to be connected with the culture medium addition mouth on airlift loop biofilm reactor, air supply system is connected by gas pump with airlift loop biofilm reactor, sampling device is connected with airlift loop biofilm reactor, airlift loop biofilm reactor is equipped with the solution pump for pumping out metal ion solution, electric cabinet respectively with sampling device, metal ion online monitoring system, control system, solution pump, gas pump and culture medium pump are electrically connected.Apparatus of the present invention can realize the leaching of noble metal efficiently, stable, and use is pollution-free, environmentally friendly.
Description
Technical field
The present invention relates to the separation of waste and old circuit board noble metal and recycling, and in particular to one kind is based on production cyanogen biomembrane reaction
The waste printed circuit board precious metal recovery device of device.
Background technology
With scientific and technical continuous progress, the appearance of electric equipment products makes people’s lives level increasingly improve.
Core component of the circuit board as various electric equipment products, learies constantly become with the increase of waste and old electric electric appliance amount
Greatly.There is coloured gold containing noble metals, copper, aluminium, zinc, tin, lead etc. such as abundant metals resources, including gold, silver, palladium in waste printed circuit board
The base metals such as category and iron.In addition, going back content largely nonmetallic resource in waste printed circuit board.Therefore, the resource of waste printed circuit board
Change the hot issue for having become resource regeneration field.Currently, the patented technology application in relation to discarded circuit board recycling is main
Concentrate on two aspects of metal and nonmetallic resource reclaim.Method is mostly Physical used by metals resources recycling, such as patent
Number it is 200510023785.5, the patent of invention of the broken and high-pressure electrostatic separation method of entitled waste and old printed circuit board and specially
Profit number is 200510023788.9, and the invention of the high-pressure electrostatic separation method and device of entitled waste PCB grains is special
Profit, Chemical Leaching method such as application No. is 200910082443.9, tin in a kind of entitled Selectively leaching discarded circuit board, copper and
The patent of invention of the method for lead.In physical recovering method waste printed circuit board when the metals resources such as copper, zinc, lead, generally use is crushed-object
The method that reason sorting is combined.The method can successfully recycle 95% or more metalliferous material from smashing waste circuit board.So
And Physical shows the deficiency in ability when detaching metallic particles mixture, such as according to used method difference
Embody that separation rate is not high or cost of equipment is excessively high, the excessively high situation of production cost, in terms of being especially embodied in recycling noble metal,
Bullion content is less, and the more difficult separation of general physical separation method or cost are excessively high.Circuit is discarded in the recycling of Chemical Leaching method
When metals resources in plate, the rate of recovery is high, and can recycle most of metal.However, Chemical Leaching method can bring serious two
Secondary pollution, such as waste water, spent acid mist etc. bring heavy environmental protection pressure to entire production technology.Meanwhile a large amount of chemicals make
Security risk is brought with to production process, the recycling of noble metal may also need to use chloroazotic acid, the huge toxicity such as hydrogen cyanide
Learn articles for use.
Bioleaching is a kind of metabolite dissolving for utilizing microorganism growth, giving off in metabolic process, leaches target
A kind of method of substance has the advantages that environmental protection, low cost.Theoretically using the noble metal in Microorganism Leaching waste printed circuit board
It is feasible, uniquely unfortunately bioleaching process is usually less efficient, especially when handling waste printed circuit board,
Nonmetallic ingredient and other metal components can destroy the leaching process of noble metal, reduce the leaching rate of noble metal.
The related patents for recycling noble metal in waste printed circuit board by efficient Bioleaching technology and device at present are seldom,
The information that waste printed circuit board noble metal is efficiently leached using production cyanogen biofilm reactor is nearly no.
Invention content
It is a kind of anti-based on production cyanogen biomembrane the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide
The waste printed circuit board precious metal recovery device of device is answered, realizes the leaching of noble metal efficiently, stable.
In order to solve the above technical problems, a kind of technical solution that the present invention takes is：
A kind of waste printed circuit board precious metal recovery device based on production cyanogen biofilm reactor, including culture medium storage tank, gas
Circulation type biofilm reactor, air supply system, sampling device, electric cabinet, metal ion online monitoring system and control system are risen,
Contain biofilm carrier in airlift loop biofilm reactor, culture medium storage tank passes through culture medium pump and airlift loop biology
Culture medium on membrane reactor is added mouth and is connected, and air supply system is connected by gas pump with airlift loop biofilm reactor
It connects, sampling device is connected with airlift loop biofilm reactor, and airlift loop biofilm reactor is equipped with for pumping
Go out the solution pump of metal ion solution, electric cabinet respectively with sampling device, metal ion online monitoring system, control system, molten
Liquid pump, gas pump and culture medium pump are electrically connected.
Preferably, airlift loop biofilm reactor is equipped with the constant temperature system for adjusting temperature of reactor.
It is further preferred that constant temperature system includes the external flow guiding cylinder being connected with airlift loop biofilm reactor, outside
Guide shell is connected to form circulation loop with constant temperature water tank and hot water circulating pump respectively.
It is further preferred that reactor membrane carrier is arranged with the airlift loop biofilm reactor place of being connected in external flow guiding cylinder
Obstruct net.
Preferably, the top of airlift loop biofilm reactor is equipped with reactor membrane carrier and obstructs net.
Preferably, it is provided with aeration head on airlift loop biofilm reactor, air supply system is connected with aeration head.
Preferably, the culture medium that culture medium storage tank provides is beef extract-peptone-sodium chloride culture medium.
Due to the use of above technical scheme, the present invention has the following advantages that compared with prior art：
The characteristics of present invention is not easy to be disturbed by environmental factor using the relatively independent microecosystem of microbial biofilm, structure
The biofilm reactor for having that stabilization produces cyanogen ability and noble metal efficiently leaches ability concurrently is built, more stable, efficient, low consumption is formed
Waste printed circuit board noble metal extract technology.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Wherein：1, culture medium storage tank；2, airlift loop biofilm reactor；3, biofilm carrier；4, air supply system；5、
Aeration head；6, sampling device；7, external flow guiding cylinder；8, constant temperature water tank；9, electric cabinet；10, metal ion online monitoring system；11、
Control system；12, solution pump；13, mouth is added in culture medium；14, gas pump；15, hot water circulating pump；16, culture medium pumps；17, anti-
Device membrane carrier is answered to obstruct net.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and embodiments.
As shown in Fig. 1, a kind of waste printed circuit board precious metal recovery device based on production cyanogen biofilm reactor of the present invention,
Including culture medium storage tank 1, airlift loop biofilm reactor 2, air supply system 4, sampling device 6, electric cabinet 9, metal ion
Online monitoring system 10 and control system 11, airlift loop biofilm reactor 2 is interior to contain biofilm carrier 3, culture medium storage
Tank 1 is added mouth 13 with the culture medium on airlift loop biofilm reactor 2 by culture medium pump 16 and is connected, air supply system 4
It is connected with airlift loop biofilm reactor 2 by gas pump 14, sampling device 6 and airlift loop biofilm reactor
2 are connected, and airlift loop biofilm reactor 2 is equipped with the solution pump 12 for pumping out metal ion solution, and electric cabinet 9 divides
16 phases are not pumped with sampling device 6, metal ion online monitoring system, control system 11, solution pump 12, gas pump 14 and culture medium
Electrical connection.
In the present embodiment, airlift loop biofilm reactor 2 is equipped with the constant temperature system for adjusting temperature of reactor, permanent
Warm system includes the external flow guiding cylinder 7 being connected with airlift loop biofilm reactor 2, external flow guiding cylinder 7 respectively with constant temperature water tank 8
And hot water circulating pump 15 is connected to form circulation loop, hot water circulating pump 15 is connected with electric cabinet 9.
In the present embodiment, external flow guiding cylinder 7 is carried with 2 place of being connected of airlift loop biofilm reactor setting reactor film
Body obstructs net 17, and the top of airlift loop biofilm reactor 2 also is provided with reactor membrane carrier barrier net 17.
In the present embodiment, it in order to preferably make gas soluble in water, is provided on airlift loop biofilm reactor 2
Aeration head 5, air supply system 4 are connected with aeration head 5.
In the present embodiment, the culture medium that culture medium storage tank 1 provides is beef extract-peptone-sodium chloride culture medium.
It is a kind of using the present invention is based on production cyanogen biofilm reactor waste printed circuit board precious metal recovery device noble metal
Recovery method includes the following steps：
1, microorganism is cultivated in airlift loop biofilm reactor（Pseudomonad）, make pseudomonad in floated film
Carrier surface forms lasting low concentration production cyanogen biomembrane；
2, it will be added in biofilm reactor through broken waste printed circuit board particle, secreted out of in pseudomonas biological film
The effect of low-concentration hydrogen cyanic acid is lower to occur metal Leach reaction, and hydrogen cyanide preferentially leaches noble metal, obtains metal ion solution；
3, precious metal ion concentration in reactor is monitored by metal ion on-line monitoring system, it, will with control system
The metal ion and discarded circuit board nonmetallic ingredient particle suspension of leaching pump out and filter nonmetallic ingredient, while passing through control
System processed supplements smashing waste wiring board particle and culture medium to reactor, it is ensured that biomembrane produces cyanogen and noble metal leaches lasting fortune
Row；
4, the metal ion solution being collected into is displaced into noble metal and common metal by way of metal replacement.
The present invention operating process be：First by the culture medium in culture medium storage tank 1（Beef extract-peptone-sodium chloride training
Support base）It is passed through in the airlift loop biofilm reactor 2 equipped with suspending type biological membrane carrier 3, and will advance cultured vacation
Monad is inoculated into reactor 2, and ventilatory capacity and temperature of reactor are adjusted by gas pump 14 and hot water circulating pump 15, is promoted false
Monad fast-growth simultaneously forms stable production cyanogen biomembrane on 3 surface of biofilm carrier（About 30 hours）；Then pass through sample introduction
Smashing waste circuit board crushed particles are added in reactor 2 device 6；Adjust nutrient concentration, pH value, the temperature in reactor 2
And dissolved oxygen concentration, promote pseudomonas biological film continuous release to go out the hydrogen cyanide of low concentration, it will be in discarded circuit board particle
Noble metal removal makes them become ionic state and enters in solution；Pass through the online on-line monitoring of inspection control system 10 reaction of metal ion
The concentration of the noble metals such as device GOLD FROM PLATING SOLUTION silver starts solution pump 12 by control system 11 when reaching a certain concentration level, will react
Solution in device is recycled the metal ion in filtrate using metal replacement method after pumping out and filtering；Then pass through control system 11
It opens culture medium pump 16 and is passed through culture medium to reactor 2, and smashing waste circuit board particle is added by sampling device 6 and is reacted
Device 2 adjusts ventilatory capacity and intensity by gas pump 14, the pseudomonas biological film in reactor 2 is promoted persistently to produce cyanogen and leach
Noble metal.This method can preferentially obtain the precious metal ions solution such as gold and silver in smashing waste circuit board with device, and detach and carry
Take noble metal.
Apparatus of the present invention can realize the leaching of noble metal efficiently, stable, and use is pollution-free, environmentally friendly.
The present invention is described in detail above, the explanation of embodiment be merely used to help understand the present invention method and
Its core concept, its object is to allow the personage for being familiar with this field technology to can understand the content of the present invention and implement it accordingly, and
It cannot be limited the scope of the invention with this.Any equivalent change or modification in accordance with the spirit of the invention should all be contained
Lid is within protection scope of the present invention.
Claims (1)
1. a kind of waste printed circuit board precious metal recovery device based on production cyanogen biofilm reactor, it is characterised in that：Including culture
Base storage tank (1), airlift loop biofilm reactor (2), air supply system (4), sampling device (6), electric cabinet (9), metal from
Sub- online monitoring system (10) and control system (11), the airlift loop biofilm reactor (2) is interior to be carried containing biomembrane
Body (3), the culture medium storage tank (1) pass through culture medium pump (16) and the training on the airlift loop biofilm reactor (2)
It supports base addition mouth (13) to be connected, the air supply system (4) passes through gas pump (14) and the airlift loop biomembrane reaction
Device (2) is connected, and the sampling device (6) is connected with the airlift loop biofilm reactor (2), the gas lift circulation
Formula biofilm reactor (2) is equipped with solution pump (12) for pumping out metal ion solution, the electric cabinet (9) respectively with institute
State sampling device (6), metal ion online monitoring system, control system (11), solution pump (12), gas pump (14) and culture medium
Pump (16) is electrically connected；
The airlift loop biofilm reactor (2) is equipped with the constant temperature system for adjusting temperature of reactor；
The constant temperature system includes the external flow guiding cylinder (7) being connected with the airlift loop biofilm reactor (2), described outer
Guide shell (7) is connected to form circulation loop with the constant temperature water tank (8) and hot water circulating pump (15) respectively；
The external flow guiding cylinder (7) is hindered with airlift loop biofilm reactor (2) place of being connected setting reactor membrane carrier
Filter (17)；
The top of the airlift loop biofilm reactor (2) is equipped with reactor membrane carrier barrier net (17)；
Aeration head (5), the air supply system (4) and the aeration are provided on the airlift loop biofilm reactor (2)
Head (5) is connected；
The culture medium that the culture medium storage tank (1) provides is beef extract-peptone-sodium chloride culture medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610539891.7A CN106011484B (en) | 2016-07-08 | 2016-07-08 | A kind of waste printed circuit board precious metal recovery device based on production cyanogen biofilm reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610539891.7A CN106011484B (en) | 2016-07-08 | 2016-07-08 | A kind of waste printed circuit board precious metal recovery device based on production cyanogen biofilm reactor |
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| Publication Number | Publication Date |
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| CN106011484A CN106011484A (en) | 2016-10-12 |
| CN106011484B true CN106011484B (en) | 2018-09-14 |
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| CN107119194B (en) * | 2017-03-22 | 2018-11-20 | 中山大学 | A kind of the high-performance bio leaching method and device of waste and old circuit board noble metal |
| EP3415647A1 (en) * | 2017-06-13 | 2018-12-19 | B.R.A.I.N. Ag | A process for recovering precious metals from secondary resources |
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| WO2001018262A2 (en) * | 1999-09-07 | 2001-03-15 | Billiton Intellectual Property B.V. | Bioleaching of sulphide minerals |
| CN103320619B (en) * | 2013-06-27 | 2015-05-20 | 扬州大学 | Method and device for biological leaching of precious metals from metal mixed particles of crushed waste circuit boards |
| CN105603187B (en) * | 2016-01-13 | 2017-07-11 | 南华大学 | Quick Oxidation Fe2+Moving-bed bioreactor and Quick Oxidation Fe2+Method |
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