CN110344080A - A method of extracting gold from waste of gold plating procedure - Google Patents
A method of extracting gold from waste of gold plating procedure Download PDFInfo
- Publication number
- CN110344080A CN110344080A CN201910599162.4A CN201910599162A CN110344080A CN 110344080 A CN110344080 A CN 110344080A CN 201910599162 A CN201910599162 A CN 201910599162A CN 110344080 A CN110344080 A CN 110344080A
- Authority
- CN
- China
- Prior art keywords
- gold
- waste
- plating procedure
- extracting
- gold plating
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/30—Acidic compositions for etching other metallic material
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Electrolytic Production Of Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The method that the invention discloses a kind of to extract gold from waste of gold plating procedure, comprising the following steps: 1): waste of gold plating procedure is sent into vibratory equipment and is vibrated, and the dust collection equipment by being connected to vibratory equipment draws the dust generated in the vibratory equipment；2): waste of gold plating procedure is put into the container containing decoating liquid, and is electrically heated, so that gold is backed off in decoating liquid from plating piece surface to saturation, moves back golden liquid containing gold to obtain；3): gold will be contained move back in golden liquid investment electrolytic cell and be electrolysed and heated, and at the same time, gas will be passed through into electrolytic cell, sprung up so that moving back golden liquid generation containing gold, gold is deposited on cathode, then removes sheet gold；4): sheet gold is cleaned；5): ingot casting is carried out to obtain fine bullion to sheet gold.The present invention is extracted gold from by the way of strip and electrolysis, not only simple process, saving raw material and time, and gold refinement rate is high, with high purity, free from environmental pollution.
Description
Technical field
The present invention relates to METAL EXTRACTION method, in particular to a kind of method that gold is extracted from waste of gold plating procedure.
Background technique
Gold has good electric conductivity, is not easy to get rusty, is anti-oxidant, corrosion-resistant, therefore can practical Huang in many semiconductors
Gold plate is to guarantee the quality of semiconductor devices, and many such gold-plated devices just lose value after scrapping, but gold is still
So there is value, therefore produce the mode extracted to the gold in gold-plated waste product.It is common from gold-plated waste product at present
The method to extract gold from is to dissolve Huang using the strong acid such as Cymag, potassium cyanide, hydrogen peroxide, sulfuric acid, hydrochloric acid and toxic chemical spills
Gold extracts again, and the process contamination environment, toxicity are big, and furthermore step is complicated, at high cost, the rate of recovery is low.
Summary of the invention
In order to overcome the deficiencies of the prior art, the method that the invention discloses a kind of extracts gold from waste of gold plating procedure.
To achieve the above object, the invention is realized by the following technical scheme:
The method that the embodiment of the invention discloses a kind of to extract gold from waste of gold plating procedure, comprising the following steps:
Step 1): waste of gold plating procedure is sent into vibratory equipment and is vibrated, and the dust collection equipment by being connected to vibratory equipment
Draw the dust generated in the vibratory equipment；
Step 2: will be by container of step 1) treated the waste of gold plating procedure investment containing decoating liquid, and be electrically heated,
So that gold is backed off in decoating liquid from plating piece surface to saturation, golden liquid is moved back containing gold to obtain；
Step 3): will contain and be electrolysed and heated in investment electrolytic cell after gold moves back golden 4-8 times of liquid dilution, at the same time, to
It is passed through gas in electrolytic cell, is sprung up so that moving back golden liquid generation containing gold, gold is deposited on cathode, and it is yellow then to remove sheet
Gold；
Step 4): the sheet gold removed in step 3) is cleaned；
Step 5): ingot casting is carried out to obtain fine bullion to sheet gold.
One of as a preferred solution of the present invention, the reaction temperature in the step 2 is 50 ° -70 °.
One of as a preferred solution of the present invention, the reaction temperature in the step 3) is 40 ° -60 °.
One of as a preferred solution of the present invention, the cathode uses stainless steel electrode, and anode uses graphite electrode.
One of as a preferred solution of the present invention, the waste material in the step 2 after strip passes through spin-drying, from
And obtain strip waste material.
It is further preferred that the strip waste material is dried after multiple washing process, to obtain clean move back
Plating waste material is simultaneously stored.
One of as a preferred solution of the present invention, the decoating liquid is sodium nitrate, boric acid, thiocarbamide, ethylenediamine tetra-acetic acid, sulphur
The mixed solution of ammonium cyanate and water.
It receives it is further preferred that every liter of water has included the nitric acid as 160-240, the boric acid is 25-30g, the sulphur
Urea is 4-7g, and the ethylenediamine tetra-acetic acid is 15-25g, and the ammonium thiocyanate is 0-0.5g.
It is further preferred that the pH value of the decoating liquid is 3-5.
One of as a preferred solution of the present invention, moveable two removings perching knife stripping film shape is used in the step 3)
Gold starts to remove sheet gold when two removing perching knives move to the two sides of the cathode respectively.
Compared with prior art, of the invention to have at least the following advantages:
The present invention is extracted gold from by the way of strip and electrolysis, not only simple process, saving raw material and time, and gold refinement
Rate is high, with high purity, free from environmental pollution.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.
Fig. 1 is a kind of flow chart for the method that gold is extracted from waste of gold plating procedure disclosed in the embodiment of the present invention.
Specific embodiment
Below with reference to examples and drawings, the present invention is described in further detail, to enable those skilled in the art's reference
Specification word can be implemented accordingly.
The method that the embodiment of the invention discloses a kind of to extract gold from waste of gold plating procedure, comprising the following steps:
Step 1): waste of gold plating procedure is sent into vibratory equipment and is vibrated, and the dust collection equipment by being connected to vibratory equipment
Draw the dust generated in the vibratory equipment；It can be made by mode of vibration dirty from waste and old circuit board on waste of gold plating procedure
On shake off, then by dust collection equipment can by vibration generate dust draw away, can so reduce in waste of gold plating procedure
It is dirty, prepare for following process；
Step 2: will be by container of step 1) treated the waste of gold plating procedure investment containing decoating liquid, and be electrically heated,
So that gold is backed off in decoating liquid from plating piece surface to saturation, golden liquid is moved back containing gold to obtain；
Step 3): will contain and be electrolysed and heated in investment electrolytic cell after gold moves back golden 4-8 times of liquid dilution, at the same time, to
It is passed through gas in electrolytic cell, is sprung up so that moving back golden liquid generation containing gold, gold is deposited on cathode, and it is yellow then to remove sheet
Gold；Be passed through gas and generate spring up phenomenon can make electrolysis more sufficiently and efficiently；
Step 4): the sheet gold removed in step 3) is cleaned；
Step 5): ingot casting is carried out to obtain fine bullion to sheet gold.
One of as a preferred solution of the present invention, the reaction temperature in the step 2 is 50 ° -70 °.
One of as a preferred solution of the present invention, the reaction temperature in the step 3) is 40 ° -60 °.
One of as a preferred solution of the present invention, the cathode uses stainless steel electrode, and anode uses graphite electrode.
One of as a preferred solution of the present invention, the waste material in the step 2 after strip passes through spin-drying, from
And obtain strip waste material.The strip waste material of circuit board one kind may be used as thermal insulation material etc..
It is further preferred that the strip waste material is dried after multiple washing process, to obtain clean move back
Plating waste material is simultaneously stored.
One of as a preferred solution of the present invention, the decoating liquid is sodium nitrate, boric acid, thiocarbamide, ethylenediamine tetra-acetic acid, sulphur
The mixed solution of ammonium cyanate and water.
It receives it is further preferred that every liter of water has included the nitric acid as 160-240, the boric acid is 25-30g, the sulphur
Urea is 4-7g, and the ethylenediamine tetra-acetic acid is 15-25g, and the ammonium thiocyanate is 0-0.5g.
It is further preferred that the pH value of the decoating liquid is 3-5.
One of as a preferred solution of the present invention, moveable two removings perching knife stripping film shape is used in the step 3)
Gold starts to remove sheet gold when two removing perching knives move to the two sides of the cathode respectively.
Below in conjunction with specific embodiment, technical scheme of the present invention will be further described.
Step 1): taking waste of gold plating procedure 10kg, be sent into vibratory equipment and vibrated, and by being connected to vibratory equipment
Dust collection equipment draws the dust generated in the vibratory equipment, it is hereby achieved that clean waste of gold plating procedure is spare；
Step 2: nitric acid is taken to receive 160-240, boric acid 25-30g, thiocarbamide 4-7g, ethylenediamine tetra-acetic acid 15-25g, ammonium thiocyanate 0-
0.5g adds 1 liter of water to be made into decoating liquid, and the pH value of decoating liquid is 3-5, and the waste of gold plating procedure in step 1) is put into decoating liquid simultaneously
And electric heating, heating temperature is 50 ° -70 °, so that gold is backed off from plating piece surface to saturation in decoating liquid, to obtain
Gold must be contained and move back golden liquid；
Step 3): will contain gold move back golden liquid be diluted with water to dilution be 8 liters after investment electrolytic cell in and be electrolysed and carried out
Heating is passed through 5V voltage, and electrolysis temperature is constant 55 °, at the same time, gas is passed through into electrolytic cell, so that moving back golden liquid containing gold
Generation is sprung up, and gold is deposited on cathode, when then moving to the two sides of the cathode respectively by two removing perching knives
Start to remove sheet gold；Be passed through gas and generate spring up phenomenon can make electrolysis more sufficiently and efficiently；
Step 4): the sheet gold removed in step 3) clean with clear water is above at least once；
Step 5): ingot casting is carried out to obtain fine bullion to sheet gold.
Various modifications to these embodiments will be readily apparent to those skilled in the art, herein
Defined General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and new
The consistent widest scope of clever feature.
Claims (10)
1. a kind of method for extracting gold from waste of gold plating procedure, it is characterised in that: the following steps are included:
Step 1): waste of gold plating procedure is sent into vibratory equipment and is vibrated, and the dust collection equipment by being connected to vibratory equipment
Draw the dust generated in the vibratory equipment；
Step 2: will be by container of step 1) treated the waste of gold plating procedure investment containing decoating liquid, and be electrically heated,
So that gold is backed off in decoating liquid from plating piece surface to saturation, golden liquid is moved back containing gold to obtain；
Step 3): will contain and be electrolysed and heated in investment electrolytic cell after gold moves back golden 4-8 times of liquid dilution, at the same time, to
It is passed through gas in electrolytic cell, is sprung up so that moving back golden liquid generation containing gold, gold is deposited on cathode, and it is yellow then to remove sheet
Gold；
Step 4): the sheet gold removed in step 3) is cleaned；
Step 5): ingot casting is carried out to obtain fine bullion to sheet gold.
2. a kind of method for extracting gold from waste of gold plating procedure according to claim 1, it is characterised in that: in the step 2
Reaction temperature be 50 ° -70 °.
3. a kind of method for extracting gold from waste of gold plating procedure according to claim 1, it is characterised in that: in the step 3)
Reaction temperature be 40 ° -60 °.
4. a kind of method for extracting gold from waste of gold plating procedure according to claim 1, it is characterised in that: the cathode uses
Stainless steel electrode, anode use graphite electrode.
5. a kind of method for extracting gold from waste of gold plating procedure according to claim 1, it is characterised in that: in the step 2
Waste material after strip passes through spin-drying, to obtain strip waste material.
6. a kind of method for extracting gold from waste of gold plating procedure according to claim 5, it is characterised in that: the strip waste material
It is dried after multiple washing process, to obtain clean strip waste material and be stored.
7. a kind of method for extracting gold from waste of gold plating procedure according to claim 1, it is characterised in that: the decoating liquid is
Sodium nitrate, boric acid, thiocarbamide, ethylenediamine tetra-acetic acid, ammonium thiocyanate and water mixed solution.
8. a kind of method for extracting gold from waste of gold plating procedure according to claim 7, it is characterised in that: contain in every liter of water
The nitric acid is received as 160-240, and the boric acid is 25-30g, and the thiocarbamide is 4-7g, and the ethylenediamine tetra-acetic acid is 15-25g,
The ammonium thiocyanate is 0-0.5g.
9. a kind of method for extracting gold from waste of gold plating procedure according to claim 7, it is characterised in that: the decoating liquid
PH value is 3-5.
10. a kind of method for extracting gold from waste of gold plating procedure according to claim 1, it is characterised in that: the step 3)
It is middle to use moveable two removings perching knife stripping film shape gold, when two removing perching knives move to the cathode respectively
Two sides when start to remove sheet gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599162.4A CN110344080A (en) | 2019-07-04 | 2019-07-04 | A method of extracting gold from waste of gold plating procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599162.4A CN110344080A (en) | 2019-07-04 | 2019-07-04 | A method of extracting gold from waste of gold plating procedure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110344080A true CN110344080A (en) | 2019-10-18 |
Family
ID=68178291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910599162.4A Pending CN110344080A (en) | 2019-07-04 | 2019-07-04 | A method of extracting gold from waste of gold plating procedure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110344080A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926185A (en) * | 2020-07-09 | 2020-11-13 | 福建闽航电子有限公司 | Recycling process of precious metal |
| CN113005295A (en) * | 2021-03-05 | 2021-06-22 | 苏州鑫达资源再生利用有限公司 | Method for recovering gold from waste gold-containing circuit board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121541A (en) * | 1995-07-06 | 1996-05-01 | 青岛大学 | Method for recovering and extracting gold |
-
2019
- 2019-07-04 CN CN201910599162.4A patent/CN110344080A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121541A (en) * | 1995-07-06 | 1996-05-01 | 青岛大学 | Method for recovering and extracting gold |
Non-Patent Citations (5)
| Title |
|---|
| 冀少华等: "某尾渣硫脲浸出金试验研究 ", 《黄金》 * |
| 唐立靖等: "微细浸染型金矿硫脲―硫氰酸铵浸出研究 ", 《黄金科学技术》 * |
| 若松贵英等: "用硫酸酸性硫脲法回收印度尼西亚金矿中金的研究 ", 《黄金》 * |
| 范斌: "矿石中金的硫脲浸出研究 ", 《湿法冶金》 * |
| 郭光新等: "《地方铁厂使用技术资料汇编》", 31 May 1986, 四川科学技术出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926185A (en) * | 2020-07-09 | 2020-11-13 | 福建闽航电子有限公司 | Recycling process of precious metal |
| CN113005295A (en) * | 2021-03-05 | 2021-06-22 | 苏州鑫达资源再生利用有限公司 | Method for recovering gold from waste gold-containing circuit board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101693997B (en) | Method for processing acidic etching waste solution of printed circuit board | |
| CN104018186A (en) | Method for recovering copper, indium, gallium and selenium | |
| CN110344080A (en) | A method of extracting gold from waste of gold plating procedure | |
| CN101914785B (en) | Method for recovering silver and copper in silver-copper alloy waste | |
| CN107099665A (en) | A kind of production technology of electrolytic zinc | |
| CN103274483B (en) | The nickel recovery process of nickel coating strip waste liquid | |
| CN104032136A (en) | Method for recycling copper, indium, gallium and selenium from waste material | |
| CN101024546B (en) | Copper etching liquid regeneration circulation method and apparatus | |
| CN103934536A (en) | Method for disassembling welded components of waste printed circuit board | |
| CN109825707A (en) | A method of recycling gold from discarded circuit board | |
| CN102517451A (en) | Method for recovering tellurium copper from tellurium slag | |
| CN203999860U (en) | A kind of device of reclaiming metals | |
| CN109302809A (en) | A kind of printed circuit board surface treatment process | |
| CN204151415U (en) | A kind of regenerating alkaline etching liquid circulating production line | |
| CN105714334A (en) | Method for recovering copper from waste etching solution and regenerating waste etching solution | |
| CN109487088A (en) | A kind of waste and old plating piece gradient recycling metal process of copper-based nickel plating-Gold plated Layer | |
| JP5024521B2 (en) | Method and apparatus for producing high-temperature and high-concentration persulfuric acid solution | |
| CN204982050U (en) | Alkaline etching liquid ammonia gas recovery unit | |
| CN108866550B (en) | Process flow for manufacturing electrolytic copper foil by using internal circulation etching solution | |
| CN108441637B (en) | The method of valuable metal is recycled from the useless chip of copper indium gallium selenium solar hull cell | |
| CN101613804B (en) | Method for recovering cadmium from waste nickel-cadmium battery | |
| CN108425017B (en) | The method of valuable metal is recycled from copper indium gallium selenide refuse battery chip | |
| CN205741153U (en) | Heavy metal the device of recycling in a kind of waste acid recovery | |
| CN104478151A (en) | Environment-friendly treatment method of caustic-soda-containing sodium hypochlorite waste liquor | |
| CN112708781B (en) | Method for recovering metal Sn from waste circuit board by adopting efficient Sn-removing medicament |
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 |