CN108950217A - A method of recycling gold and silver from waste printed circuit board - Google Patents
A method of recycling gold and silver from waste printed circuit board Download PDFInfo
- Publication number
- CN108950217A CN108950217A CN201810921047.XA CN201810921047A CN108950217A CN 108950217 A CN108950217 A CN 108950217A CN 201810921047 A CN201810921047 A CN 201810921047A CN 108950217 A CN108950217 A CN 108950217A
- Authority
- CN
- China
- Prior art keywords
- silver
- circuit board
- printed circuit
- gold
- waste printed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- 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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/20—Electrolytic production, recovery or refining of metals by electrolysis of solutions of noble metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of methods that gold and silver are recycled in waste printed circuit board, it include: to be crushed waste printed circuit board, obtain furnace charge, it is calcined in investment smelting furnace, obtains fused materials and clinker, nitric acid is added in fused materials and leaches, leachate and leached mud is obtained by filtration, wherein leachate is electrolysed to obtain silver, and leached mud is added chloroazotic acid, gold is obtained by extraction.The method of the invention process flow is short, practical, and gold and silver-colored high-value product are obtained from old circuit board, has environment protection significance outstanding and economic benefit.
Description
Technical field
The present invention relates to old circuit board resource recycling methods, especially a kind of to recycle from waste printed circuit board
The method of gold and silver.
Background technique
The rapid development of China's electronics industry, electronic product update speed is fast, caused by generated electron wastes
Environmental problem is increasingly prominent.For example, China year scrap update household electrical appliances be more than 25,000,000, average annual growth 3%-5%, only this
One produced electronic waste estimates that the year two thousand twenty will be up to 100,000,000 tons.Waste printed circuit board (WPCBs) is in electronic waste
Common item, since containing there are many poisonous and harmful element, conventional method is difficult to handle, generally requires and remove from electronic device
Individually separately store.Waste printed circuit board is the solid waste by government regulation, is rich in a variety of precious metals, and easy to pollute
Environment studies its processing scheme with environment protection significance outstanding.
Printed wiring board is mainly made of substrate, electronic component and scolding tin three parts, and substrate is by high molecular polymer (tree
Rouge), glass fibre or brown paper and high-purity copper foil bond.Substrate is only the carrier of electronic component, each for supporting
The connection of kind electronic component, and electronic component is only the main body for realizing electronic apparatus various functions.There is research to computer main board point
Analysis discovery, electronic component, substrate and scolding tin three's proportion are about 58%, 37% and 5%.This is but also in printed circuit board
Usually contain about 40% metal, 30% plastics and 30% indissoluble oxide, almost contain institute in the periodic table of elements
There is common element.It is estimated that about 0.5k gold, 130k copper, 10k will be spent by averagely manufacturing the computer wiring board of 1t
Iron, 60k lead, 40k tin, 36k nickel and 40k antimony and the rare precious metals such as palladium and platinum.And only wherein the gold value of 0.5k is as high as
150000 yuan, the gold grade in significantly larger than general gold mine ore.Therefore, metal component is contamination-freely recycled from WPCBs Green
It recycles, the serious situation that China's metal resource relies on import for a long time can not only be alleviated to a certain extent, and have important
Economic results in society.
Patent application CN106519438A discloses a kind of waste printed circuit board/waste and old bumper reclaiming fender
The method of material after waste printed circuit board is removed metal material, crushes, is mixed together granulation, the party with waste and old bumper
Method first has to removing waste printed circuit board into metal material, and is only that this step is just difficult in practice, due to gold
Category is that the modes such as welding or printing combine in the circuit board, either manual demolition or long-time acid soak, is all difficult to
Realize preferable metal removal effect.And padded coaming market area tends to be saturated, and this method bring economic benefit is general.
Summary of the invention
The purpose of the invention is to overcome the problems, such as that existing waste printed circuit board is reluctant, product market value
Low problem provides a kind of method that gold and silver are recycled from waste printed circuit board.
Concrete scheme is as follows:
A method of recycling gold and silver from waste printed circuit board, comprising the following steps:
Step 1: waste printed circuit board being crushed, furnace charge is obtained；
Step 2: by the resulting furnace charge investment smelting furnace of step 1, being calcined at 800-1000 DEG C, obtain fused materials and furnace
Slag；
Step 3: nitric acid is added into the fused materials that step 2 obtains and leaches, leachate and leached mud is obtained by filtration；
Step 4: the resulting leachate of step 3 being electrolysed, silver is obtained；
Step 5: chloroazotic acid is added in the resulting leached mud of step 3, gold is obtained by extraction in acquired solution.
Further, it is 1-100mm that the obtained furnace size is crushed in step 1.
Further, it is 1:0.001- that step 2, which includes: 2a by the resulting furnace charge of step 1 and additive according to mass ratio,
0.003 mixes, and obtains mixture charge, mixture charge is put into smelting furnace according to the speed of 50-200kg/h by 2b, at 850-950 DEG C
Calcining, obtains fused materials and clinker.
Further, additive described in step 2 is calcium oxide, sodium oxide molybdena, potassium oxide, silica, aluminium oxide, oxidation
At least one of iron, titanium oxide.
Further, the dosage of nitric acid is the 60%-90% of fused materials gross weight in step 3, leaches 4-8h at room temperature.
Further, the dosage of chloroazotic acid is 2-3 times of the leached mud gross weight in step 5.
Further, golden component will be contained including addition extractant by, which extracting in step 5, is transferred to extraction phase, addition back extraction later
Agent is taken to obtain gold.
Further, extraction uses extractant to appoint in diethylene glycol dibutyl ether, methylisobutylketone or butylphosphoric acid ester in step 5
It anticipates one kind, uses strippant for oxalic acid or sodium nitrite.
Further, the temperature of the extraction system or back extraction system that extract in step 5 is 20-40 DEG C.
The present invention also protects the method for recycling gold and silver from waste printed circuit board with described, the gold being prepared
Or silver.
The utility model has the advantages that
In the present invention, it is sent directly into smelting furnace after waste printed circuit board is crushed, by smelting furnace hot environment, waste and old line
Organic principle full combustion in the plate of road, by controlling the reaction temperature of smelting furnace, so that the organic principle in old circuit board turns
Clean flue gas is turned to, the generation of the pernicious gases such as dioxin is avoided.
Moreover the organic principle burning in old circuit board discharges a large amount of thermal energy, helps the metal in old circuit board
Ingredient dissolution reduces smelting furnace to 30% or so of extraneous energy demand total amount, reduces the energy consumption of entire technique.
Further, then enter furnace containing gold and silver element, dystectic element such as platinum and palladium in molten product in smelting furnace
Slag realizes the initial gross separation of valuable metals in waste circuit board with the separation of fused materials and clinker, solves your traditional gold
Belong to the problem that the separation of palladium-silver present in separation is interfered, platinum and gold separation are difficult.
The present invention further passes through extraction and back extraction technology obtains the higher golden simple substance of purity, improves the valence of product
Value has preferable economic benefit.
In short, the method for the invention process flow is short, practical, gold, silver high value is obtained from old circuit board
Product has environment protection significance outstanding and economic benefit.
Specific embodiment
The definition of part term used in the present invention is given below, other terms that do not address have well known in the art
Definition and meaning:
Waste printed circuit board, also known as discarded printed circuit boards are the supporter and electronic component electricity of electronic component
The carrier of gas connection.In the present invention waste printed circuit board include common household electrical appliance, mobile device, control unit equipment,
The printed wiring board that the recycling such as computer obtain, the printed wiring board remove the impurity such as dust merely through simple cleaning treatment,
Without the fractionation of metal structure and the dismounting of electronic component.
It is 1-100mm, preferably 50-95mm that the obtained furnace size is crushed in step 1 of the present invention, more preferably
60-80mm, such as 65mm, such as 70mm, such as 75mm.Undersized be easy to cause smelting furnace fouling, and granularity is compared higher than 50mm
Lower granularity is not susceptible to furnace charge reunion.
Waste printed circuit board is calcined in smelting furnace in the present invention, is preferably added to a certain amount of additive auxiliary calcining, is added
Adding agent is preferably at least one of calcium oxide, sodium oxide molybdena, potassium oxide, silica, aluminium oxide, iron oxide, titanium oxide, more preferable oxygen
Change calcium and silica mixing or sodium oxide molybdena and silica mixing, mixed proportion can be 1:1 or 1:2, and additive adds
Entering the slag wall built-up in softening clinker, reduction smelting furnace has preferable effect.It should be noted that the silica include SiO,
SiO2And Si2O6。
In step 2 of the present invention, smelting furnace calcination temperature needs to control at 800-1000 DEG C, is lower than 800 DEG C, noble metal dissolution
Measure limited, the rate of recovery is low.Higher than 1000 DEG C, platinum and palladium can be brought into fused materials, increase subsequent precious metal separation difficulty.It is molten
Preferred 850-950 DEG C of furnace temperature, 850 DEG C or more, the pernicious gases such as dioxin can be completely broken down, and gained flue gas passes through routine
Dedusting can empty, and reduce fume treatment burden and cost.Biggish with smelting furnace calcination temperature relationship is charging rate, holding furnace
Material preferably incorporates smelting furnace according to the speed of 50-200kg/h, is lower than 50kg/h, smelting furnace production efficiency is low, and processing speed is slow, is higher than
200kg/h, the material calcining that early period enters is incomplete, is not only easy freezing of a furnace, but also metal recovery rate declines.Usually contain in clinker
There are the noble metals such as platinum, palladium, relevant treatment unit can be sent to and further recycle valuable metal.
The dosage of nitric acid is the 60%-90% of fused materials gross weight in step 3 of the present invention, leaches 4-8h at room temperature, here
Nitric acid refer to that the aqueous solution of dust technology, preferred mass score are the dust technology of 10-50%.
Leachate is electrolysed in step 4 of the present invention, obtains silver, and electrolysis mode uses existing conventional method, such as
Under 1.5~3.5 volts of direct current electro ultrafiltrations, silver is deposited on cathode on cathode with loose large particle crystal shape, collects the silver of deposition
Obtain product.
Chloroazotic acid is added in leached mud in step 5 of the present invention, by Gold leaching, into liquid phase, after being acted on by extractant, into having
In machine extraction phase, it is stabilized in extraction phase with the compound form of gold.By the back extraction aqueous solvent of reproducibility, so that
The compound of gold is converted into golden simple substance and is precipitated.Chloroazotic acid is by concentrated hydrochloric acid (HCl) and concentrated nitric acid (HNO3) it is by volume 3:1 group
At.Preferably, extractant is any one in diethylene glycol dibutyl ether, methylisobutylketone or butylphosphoric acid ester, and strippant is oxalic acid
Or sodium nitrite.The extraction system of extraction or the temperature for being stripped system are 20-40 DEG C, not only result in extraction higher than 40 DEG C
Take agent or the volatilization of strippant, it is often more important that will cause the decline of golden simple substance purity, it may be possible to make since temperature raises
It is increased at the resulting solution system oxidisability of leached mud, more impurity components are leached, and are precipitated during back extraction.
The preferred embodiment of the present invention is described in more detail below.Although the following describe preferred implementations of the invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.It is real
It applies and particular technique or condition person is not specified in example, according to the literature in the art described technology or conditions or according to product
Specification carries out.Reagents or instruments used without specified manufacturer, being can be with conventional products that are commercially available.Under
In the embodiment in face, such as it is not known and illustrates, " % " refers both to weight percent.
Contain in waste printed circuit board in embodiment: plastics 49.62%, copper 20.54%, iron 7.46%, bromide
4.65%, lead 4.08%, tin 3.26%, nickel 3.18%, antimony 1.83%, zinc 0.47%, gold 0.12%, silver-colored 0.16%, cadmium
0.06%, palladium 0.03%, cobalt 0.02%, platinum 0.01%, mercury 0.002%, surplus other elements content are lower than 0.002%.
Embodiment 1
A method of recycling gold and silver from waste printed circuit board, comprising the following steps:
Step 1: waste printed circuit board being crushed, furnace charge, granularity 1-20mm are obtained；
Step 2: according to mass ratio it is that 1:0.001 is mixed by the resulting furnace charge of step 1 and additive, obtains mixture charge,
By mixture charge according in the speed investment smelting furnace of 50kg/h, is calcined at 800 DEG C, obtain fused materials and clinker；Additive
For sodium oxide molybdena；
Step 3: the dust technology that mass fraction 20% is added into the fused materials that step 2 obtains leaches, and dosage is melting
The 80% of material gross weight, is obtained by filtration leachate and leached mud；
Step 4: the resulting leachate of step 3 being electrolysed, silver is precipitated in cathode, and collection obtains silver-colored simple substance, and purity is
99.85%, the rate of recovery 99.3%；
Step 5: the resulting leached mud of step 3 being added in chloroazotic acid at room temperature, is filtered after reacting 3h, is removed obtained by solid phase
Diethylene glycol dibutyl ether is added in solution, is extracted at room temperature, organic phase is separated, quality point is added into extraction phase at room temperature
The sodium nitrite solution that number is 25% stirs, and stands, and there is precipitate in solution bottom, washes after filtering, is dried to obtain golden simple substance,
Purity is 99.96%, the rate of recovery 99.1%.
Embodiment 2
A method of recycling gold and silver from waste printed circuit board, comprising the following steps:
Step 1: waste printed circuit board being crushed, furnace charge, granularity 30-50mm are obtained；
Step 2: according to mass ratio it is that 1:0.002 is mixed by the resulting furnace charge of step 1 and additive, obtains mixture charge,
By mixture charge according in the speed investment smelting furnace of 100kg/h, is calcined at 850 DEG C, obtain fused materials and clinker；Additive
For calcium oxide；
Step 3: the dust technology that mass fraction 30% is added into the fused materials that step 2 obtains leaches, and dosage is melting
The 70% of material gross weight, is obtained by filtration leachate and leached mud；
Step 4: the resulting leachate of step 3 being electrolysed, silver is precipitated in cathode, and collection obtains silver-colored simple substance, and purity is
99.80%, the rate of recovery 99.5%；
Step 5: the resulting leached mud of step 3 being added in chloroazotic acid at room temperature, is filtered after reacting 3h, is removed obtained by solid phase
Methylisobutylketone is added in solution, is extracted at room temperature, separates organic phase, mass fraction is added into extraction phase at room temperature
It for 30% sodium nitrite solution, stirs, stands, there is precipitate in solution bottom, washes after filtering, is dried to obtain golden simple substance, pure
Degree is 99.95%, the rate of recovery 99.1%.
Embodiment 3
A method of recycling gold and silver from waste printed circuit board, comprising the following steps:
Step 1: waste printed circuit board being crushed, furnace charge, granularity 80-95mm are obtained；
Step 2: according to mass ratio it is that 1:0.003 is mixed by the resulting furnace charge of step 1 and additive, obtains mixture charge,
By mixture charge according in the speed investment smelting furnace of 150kg/h, is calcined at 900 DEG C, obtain fused materials and clinker；Additive
It according to mass ratio is that 1:1 is mixed for calcium oxide and silica；
Step 3: the dust technology that mass fraction 40% is added into the fused materials that step 2 obtains leaches, and dosage is melting
The 65% of material gross weight, is obtained by filtration leachate and leached mud；
Step 4: the resulting leachate of step 3 being electrolysed, silver is precipitated in cathode, and collection obtains silver-colored simple substance, and purity is
99.83%, the rate of recovery 99.2%；
Step 5: the resulting leached mud of step 3 being added in chloroazotic acid at room temperature, is filtered after reacting 3h, is removed obtained by solid phase
Butylphosphoric acid ester is added in solution, is extracted at room temperature, organic phase is separated, oxalic acid is added into extraction phase at room temperature, stirs,
It stands, there is precipitate in solution bottom, washes after filtering, is dried to obtain golden simple substance, purity 99.98%, the rate of recovery 99.6%.
Embodiment 4
A method of recycling gold and silver from waste printed circuit board, comprising the following steps:
Step 1: waste printed circuit board being crushed, furnace charge, granularity 60-85mm are obtained；
Step 2: according to mass ratio it is that 1:0.003 is mixed by the resulting furnace charge of step 1 and additive, obtains mixture charge,
By mixture charge according in the speed investment smelting furnace of 200kg/h, is calcined at 1000 DEG C, obtain fused materials and clinker；Addition
It is 1:1 mixing that agent, which is iron oxide and sodium oxide molybdena according to mass ratio,；
Step 3: the dust technology that mass fraction 10% is added into the fused materials that step 2 obtains leaches, and dosage is melting
The 90% of material gross weight, is obtained by filtration leachate and leached mud；
Step 4: the resulting leachate of step 3 being electrolysed, silver is precipitated in cathode, and collection obtains silver-colored simple substance, and purity is
99.76%, the rate of recovery 99.5%；
Step 5: the resulting leached mud of step 3 being added in chloroazotic acid at room temperature, is filtered after reacting 3h, is removed obtained by solid phase
Diethylene glycol dibutyl ether is added in solution, is extracted at room temperature, organic phase is separated, quality point is added into extraction phase at room temperature
The sodium nitrite solution that number is 25% stirs, and stands, and there is precipitate in solution bottom, washes after filtering, is dried to obtain golden simple substance,
Purity is 99.95%, the rate of recovery 99.0%.
Embodiment 5
A method of recycling gold and silver from waste printed circuit board, comprising the following steps:
Step 1: waste printed circuit board being crushed, furnace charge, granularity 60-100mm are obtained；
Step 2: according to mass ratio it is that 1:0.001 is mixed by the resulting furnace charge of step 1 and additive, obtains mixture charge,
By mixture charge according in the speed investment smelting furnace of 150kg/h, is calcined at 950 DEG C, obtain fused materials and clinker；Additive
For sodium oxide molybdena；
Step 3: the dust technology that mass fraction 50% is added into the fused materials that step 2 obtains leaches, and dosage is melting
The 60% of material gross weight, is obtained by filtration leachate and leached mud；
Step 4: the resulting leachate of step 3 being electrolysed, silver is precipitated in cathode, and collection obtains silver-colored simple substance, and purity is
99.79%, the rate of recovery 99.4%；
Step 5: the resulting leached mud of step 3 being added in chloroazotic acid at room temperature, is filtered after reacting 3h, is removed obtained by solid phase
Methylisobutylketone is added in solution, is extracted at room temperature, separates organic phase, mass fraction is added into extraction phase at room temperature
It for 25% sodium nitrite solution, stirs, stands, there is precipitate in solution bottom, washes after filtering, is dried to obtain golden simple substance, pure
Degree is 99.95%, the rate of recovery 99.1%.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of method for recycling gold and silver from waste printed circuit board, it is characterised in that: the following steps are included:
Step 1: waste printed circuit board being crushed, furnace charge is obtained；
Step 2: by the resulting furnace charge investment smelting furnace of step 1, being calcined at 800-1000 DEG C, obtain fused materials and clinker；
Step 3: nitric acid is added into the fused materials that step 2 obtains and leaches, leachate and leached mud is obtained by filtration；
Step 4: the resulting leachate of step 3 being electrolysed, silver is obtained；
Step 5: chloroazotic acid is added in the resulting leached mud of step 3, gold is obtained by extraction in acquired solution.
2. the method according to claim 1 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 1
In to be crushed the obtained furnace size be 1-100mm.
3. the method according to claim 1 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 2
Include: 2a by the resulting furnace charge of step 1 and additive according to mass ratio it is that 1:0.001-0.003 is mixed, obtains mixture charge, 2b
Mixture charge is put into smelting furnace according to the speed of 50-200kg/h, is calcined at 850-950 DEG C, obtains fused materials and clinker.
4. the method according to claim 3 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 2
Described in additive be at least one of calcium oxide, sodium oxide molybdena, potassium oxide, silica, aluminium oxide, iron oxide or titanium oxide.
5. the method according to claim 1 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 3
The dosage of middle nitric acid is the 60%-90% of fused materials gross weight, leaches 4-8h at room temperature.
6. the method according to claim 1 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 5
The dosage of middle chloroazotic acid is 2-3 times of the leached mud gross weight.
7. the method according to claim 1 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 5
Middle extraction will contain golden component including addition extractant and be transferred to extraction phase, add strippant later and obtain gold.
8. the method according to claim 7 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 5
Middle extraction uses extractant for any one in diethylene glycol dibutyl ether, methylisobutylketone or butylphosphoric acid ester, and strippant is oxalic acid
Or sodium nitrite.
9. the method according to claim 7 for recycling gold and silver from waste printed circuit board, it is characterised in that: step 5
The extraction system of middle extraction or the temperature for being stripped system are 20-40 DEG C.
10. being prepared into the method for any of claims 1-9 for recycling gold and silver from waste printed circuit board
The gold or silver arrived.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810921047.XA CN108950217A (en) | 2018-08-14 | 2018-08-14 | A method of recycling gold and silver from waste printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810921047.XA CN108950217A (en) | 2018-08-14 | 2018-08-14 | A method of recycling gold and silver from waste printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108950217A true CN108950217A (en) | 2018-12-07 |
Family
ID=64469600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810921047.XA Pending CN108950217A (en) | 2018-08-14 | 2018-08-14 | A method of recycling gold and silver from waste printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108950217A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110484748A (en) * | 2019-09-06 | 2019-11-22 | 中南大学 | A method of the selective recovery silver from discarded circuit board |
| CN110724973A (en) * | 2019-11-19 | 2020-01-24 | 安徽焦冲矿业有限公司 | Efficient environment-friendly high-purity gold preparation method |
| CN111690816A (en) * | 2020-06-03 | 2020-09-22 | 广东忠能科技集团有限公司 | Slag metal production process |
| CN111842404A (en) * | 2020-06-02 | 2020-10-30 | 广东忠能科技集团有限公司 | Low-nitrogen slag treatment method |
| CN114737223A (en) * | 2022-04-26 | 2022-07-12 | 徐家卫 | Precious metal electrolysis recovery system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181644A (en) * | 2011-04-13 | 2011-09-14 | 深圳市格林美高新技术股份有限公司 | Method for reclaiming rare noble metals from waste circuit board |
| CN102277497A (en) * | 2011-08-05 | 2011-12-14 | 武汉格林美资源循环有限公司 | Method of reclaiming gold, palladium, platinum and silver from waste circuit board |
| CN105132690A (en) * | 2015-09-20 | 2015-12-09 | 成都育芽科技有限公司 | Method for extracting gold, silver, platinum and palladium from electronic waste |
| CN106702164A (en) * | 2017-01-05 | 2017-05-24 | 北京科技大学 | Method and device of recovering valuable metals in steps from waste electronic circuit board particles |
| CN107400780A (en) * | 2017-07-18 | 2017-11-28 | 四川长虹电器股份有限公司 | A kind of method that gold, silver and bronze are extracted in the plate from cell phone lines |
-
2018
- 2018-08-14 CN CN201810921047.XA patent/CN108950217A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181644A (en) * | 2011-04-13 | 2011-09-14 | 深圳市格林美高新技术股份有限公司 | Method for reclaiming rare noble metals from waste circuit board |
| CN102277497A (en) * | 2011-08-05 | 2011-12-14 | 武汉格林美资源循环有限公司 | Method of reclaiming gold, palladium, platinum and silver from waste circuit board |
| CN105132690A (en) * | 2015-09-20 | 2015-12-09 | 成都育芽科技有限公司 | Method for extracting gold, silver, platinum and palladium from electronic waste |
| CN106702164A (en) * | 2017-01-05 | 2017-05-24 | 北京科技大学 | Method and device of recovering valuable metals in steps from waste electronic circuit board particles |
| CN107400780A (en) * | 2017-07-18 | 2017-11-28 | 四川长虹电器股份有限公司 | A kind of method that gold, silver and bronze are extracted in the plate from cell phone lines |
Non-Patent Citations (2)
| Title |
|---|
| 刘时杰 等: "《铂族金属冶金学》", 30 June 2013, 中南大学出版社 * |
| 刘楚明 等: "《铜合金相图集》", 30 November 2011, 中南大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110484748A (en) * | 2019-09-06 | 2019-11-22 | 中南大学 | A method of the selective recovery silver from discarded circuit board |
| CN110724973A (en) * | 2019-11-19 | 2020-01-24 | 安徽焦冲矿业有限公司 | Efficient environment-friendly high-purity gold preparation method |
| CN111842404A (en) * | 2020-06-02 | 2020-10-30 | 广东忠能科技集团有限公司 | Low-nitrogen slag treatment method |
| CN111690816A (en) * | 2020-06-03 | 2020-09-22 | 广东忠能科技集团有限公司 | Slag metal production process |
| CN114737223A (en) * | 2022-04-26 | 2022-07-12 | 徐家卫 | Precious metal electrolysis recovery system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108950217A (en) | A method of recycling gold and silver from waste printed circuit board | |
| CN108118157B (en) | Wiring board burns the recovery method of cigarette ash pretreatment and bromine | |
| CN102534226B (en) | Method for extracting precious metal from spent automobile catalyst by concentration smelting-wet separation process | |
| CN105567978B (en) | The method that copper zinc cobalt nickel is recycled from the various waste materials containing non-ferrous metal | |
| US8882881B2 (en) | Method for concentrating and recovering precious metals from spent mobile phone PCBS and spent auto-catalysts using waste nonferrous slag | |
| CN105349787B (en) | The recovery and treatment method of valuable metal in electronic waste | |
| CN102994771B (en) | Method for extracting palladium sponge from silver electrolysis anode slime parting liquid | |
| CN101078052B (en) | Method for synthetically reclaiming iron and non-ferrous metal from solid waste of iron and steel plant | |
| CN105400962A (en) | Method for recycling platinum group metal from waste catalysts | |
| CN104028530B (en) | The processing method of waste and old circuit board | |
| CN103667707A (en) | Method of recovering gold and silver from a waste circuit board | |
| CN104762479B (en) | The technique of synthetical recovery gold silver platinum palladium rare precious metal from gold-containing scrap | |
| CN104120444B (en) | A kind of technique using mechanical activation reducing process to reclaim metallic lead from waste and old lead bearing glass | |
| CN102534225A (en) | Treatment method for anode mud | |
| WO2004048623A1 (en) | Method for recovering trace elements from coal | |
| CN108950218A (en) | A method of recycling gold, silver and copper from waste printed circuit board | |
| CN109136532B (en) | Method for synergistically recycling waste circuit board and automobile exhaust waste catalyst | |
| CN102443703A (en) | Method for extracting copper from scrap copper through wet process | |
| CN105256145A (en) | Method for extracting noble metal from waste vehicle exhaust catalyst | |
| CN105039724A (en) | Smelting furnace soot treatment method | |
| CN106521169B (en) | A kind of method of argentiferous lead slag for comprehensive recovery | |
| CN102618722B (en) | Clean recovery production method of copper-containing waste | |
| CN108998673A (en) | A method of recycling gold, silver and copper sulphate from waste printed circuit board | |
| CN105603217B (en) | The method of antimony enrichment and recycling in waste acid vulcanized slag | |
| KR101244632B1 (en) | Recovery method of valuable metal from wasted portable device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |