CN104152696A - Process for recycling gold from waste circuit boards - Google Patents
Process for recycling gold from waste circuit boards Download PDFInfo
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- CN104152696A CN104152696A CN201410332481.6A CN201410332481A CN104152696A CN 104152696 A CN104152696 A CN 104152696A CN 201410332481 A CN201410332481 A CN 201410332481A CN 104152696 A CN104152696 A CN 104152696A
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- powder
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- golden
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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
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- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention provides a process for recycling gold from waste circuit boards. The process for recycling gold from the waste circuit boards comprises the following processing steps: collecting raw material, crushing, smashing, carrying out water separation by adopting a shaking table, carrying out suspension electrolysis and purifying gold. The process for recycling gold of the waste circuit board has the advantages that the technological process is simple, operation is convenient, the production equipment investment cost is low, various substances in the waste circuit boards can be effectively separated, high-purity gold is recycled, and the aim of environment-friendly resource recycling is realized.
Description
Technical field
The present invention relates to a kind of golden recovery process, be specially adapted to contain golden old circuit board and the golden recovery process containing golden-rimmed corner material.
Background technology
Along with the quick increase of domestic and international electronic product and the continuous quickening of renewal rate, China's electronic waste generation also sharply increases.As the core component of electronic product, in old circuit board, comprise a large amount of metals and non-metallic material, directly abandon and not only waste ample resources, also can destroy ecotope, therefore, the recovery of old circuit board is very necessary.The recovery of old circuit board comprises the recovery of metal ingredient and nonmetal composition, and the prerequisite reclaiming is the enrichment that realizes both and separate.
At present, the recycling technology of old circuit board mainly contains the methods such as mechanical treatment, pyrogenic process recovery, hydrometallurgic recovery.
The basic procedure that pyrogenic process reclaims is that the circuit card that first will give up is crushed to certain particle diameter, sends in an incinerator and burns, and the organic compositions such as plastics wherein, resin, ink are decomposed and destroyed, and organic gas is separated with solid.Residue after burning is exposed metal or its oxide compound.This method can produce a large amount of toxic gases, has both polluted environment, can lose again part precious metal.
Hydrometallurgic recovery ultimate principle is to utilize nitric acid, chloroazotic acid or other strong acid can dissolve most metals in waste material, and makes base metal enter liquid phase with precious metal and separate with unclassified stores, then from liquid phase, reclaims precious metal and other base metals.This processing, cost is high, efficiency is low, subsequent wastewater treatment pressure is large.
Mechanical treatment, by mechanical disintegration, separates metal and the sorting of nonmetal rear employing ore-dressing technique technology in wiring board by wiring board, obtains metal and nonmetal, reclaims metals resources thereby realize.The features such as mechanical treatment process is simple to operate because of having, and environmental pollution is less are more and more subject to everybody attention.
Summary of the invention
Based on this, the object of the present invention is to provide a kind of technical process simple, and effective various materials in separating waste, worn wiring board, reclaim the higher gold of purity, realize environmentally friendly resource utilization and reclaim the golden recovery process of the old circuit board of object.
The present invention realizes by following technical proposals, and a kind of golden recovery process of old circuit board is characterized in that step is as follows:
(1) collect remove electronic component in wiring board and wiring board enterprise production process, produce containing scrapping of gold containing golden old wiring board, wiring board enterprise containing golden-rimmed corner material;
(2) utilize crusher to be broken into the fragment below 20mm containing golden old circuit board;
(3) utilize pulverizer that the wiring board fragment below above-mentioned 20mm is ground into the fine powder below 0.5mm;
(4) utilize shaking table taking water as medium, the metal-powder in fine powder and non-metal powder to be separated;
(5) metal-powder is carried out to suspension electrolysis, negative electrode obtains copper sheet, and the metal-powder beyond copper becomes the main anode sludge containing gold, nickel etc.;
(6) anode sludge is purified, use rare nitric acid treatment, the nickel in the anode sludge etc. dissolved fall, be left to be insoluble to the thick bronze of nitric acid, then by thick bronze refining.
Further, if described old circuit board size is larger, first utilize shearing device to be cut into the following fragment of 100mm, facilitate crusher work.
Further, in described suspension electrolysis operation, taking the titanium basket of outer cover nylon wire as anode, copper coin is negative electrode, and the metal-powder sorting out is placed in titanium basket, under power on condition, copper powder in anode titanium basket can dissolve becomes cupric ion, and cupric ion obtains electronic deposition on copper coin at negative electrode.
The present invention is a kind of golden recovery process of old circuit board, and not only technical process is simple, easy to operate, investment of production equipment cost is low, and effective various materials in separating waste, worn wiring board, reclaim the higher gold of purity, realize environmentally friendly resource utilization and reclaimed object.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention.
Reference numeral: 101, raw material is collected; 102, fragmentation; 103, pulverize; 104, shaking table wet concentration; 105, suspension electrolysis; 106, gold is withdrawn deposit.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
As shown in Figure 1, a kind of golden recovery process of old circuit board, comprises that raw material collects (101), broken (102), pulverizes (103), shaking table wet concentration (104), suspension electrolysis (105) and gold (106) processing step of withdrawing deposit, and specific operation process is as follows:
(1) raw material is collected (101): collect remove electronic component in wiring board and wiring board enterprise production process, produce containing scrapping of gold containing golden old wiring board, wiring board enterprise containing golden-rimmed corner material;
(2) broken (102): if described old circuit board size is larger, first utilize shearing device to be cut into the following fragment of 100mm, facilitate crusher work, then make to enter crusher containing golden old circuit board and carry out fragmentation, this crusher is by the screen cloth in configuration 20mm aperture, make to be less than outside the fragment discharge machine of 20mm, the fragment that is greater than 20mm is stayed the interior continuation fragmentation of machine until meet the requirements;
(3) pulverize (103): utilize pulverizer that the wiring board fragment below above-mentioned 20mm is continued to pulverize, this pulverizer is by the screen cloth in configuration 0.5mm aperture, make to be less than outside the powder materials discharge machine of 0.5mm, the powder that is greater than 0.5mm is stayed the interior continuation pulverizing of machine until meet the requirements;
(4) shaking table wet concentration (104): utilize shaking table taking water as medium, the metal-powder in fine powder and non-metal powder to be separated;
(5) suspension electrolysis (105): metal-powder is carried out to suspension electrolysis, and the copper in metal-powder, in the oxidized dissolving of anode, obtains electronic deposition on copper sheet at cathode copper ion, the metal-powder beyond copper becomes the main anode sludge containing gold, nickel etc.;
(6) gold is withdrawn deposit (106): the anode sludge is purified, use rare nitric acid treatment, the nickel in the anode sludge etc. dissolved fall, be left to be insoluble to the thick bronze of nitric acid, then by thick bronze refining.
In suspension electrolysis (105) operation, taking the titanium basket of outer cover nylon wire as anode, copper coin is negative electrode, the metal-powder sorting out is placed in titanium basket, under power on condition, the copper powder in anode titanium basket can dissolve becomes cupric ion, and cupric ion obtains electronic deposition on copper coin at negative electrode.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention.The conversion of equipment, material and purposes that every the present invention of utilization and accompanying drawing content are done, is all in like manner included in scope of patent protection of the present invention.
Claims (2)
1. a golden recovery process for old circuit board, its concrete treatment process is as follows:
(1) collect remove electronic component in wiring board and wiring board enterprise production process, produce containing scrapping of gold containing golden old wiring board, wiring board enterprise containing golden-rimmed corner material;
(2) utilize crusher to be broken into the fragment below 20mm containing golden old circuit board;
(3) utilize pulverizer that the wiring board fragment below above-mentioned 20mm is ground into the fine powder below 0.5mm;
(4) utilize shaking table taking water as medium, the metal-powder in fine powder and non-metal powder to be separated;
(5) metal-powder is carried out to suspension electrolysis, negative electrode obtains copper sheet, and the metal-powder beyond copper becomes the anode sludge;
(6) anode sludge is purified, use rare nitric acid treatment, the nickel in the anode sludge can be fallen by nitric acid dissolve, and the remaining thick bronze that is insoluble to nitric acid, then by thick bronze refining.
2. the golden recovery process of a kind of old circuit board as claimed in claim 1, it is characterized in that in described suspension electrolysis operation, taking the titanium basket of outer cover nylon wire as anode, copper coin is negative electrode, the metal-powder sorting out is placed in titanium basket, under power on condition, the copper powder in anode titanium basket can dissolve becomes cupric ion, and cupric ion obtains electronic deposition on copper coin at negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410332481.6A CN104152696A (en) | 2014-07-14 | 2014-07-14 | Process for recycling gold from waste circuit boards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410332481.6A CN104152696A (en) | 2014-07-14 | 2014-07-14 | Process for recycling gold from waste circuit boards |
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| Publication Number | Publication Date |
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| CN104152696A true CN104152696A (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410332481.6A Pending CN104152696A (en) | 2014-07-14 | 2014-07-14 | Process for recycling gold from waste circuit boards |
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| CN (1) | CN104152696A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714335A (en) * | 2014-12-05 | 2016-06-29 | 上海奇谋能源技术开发有限公司 | Anode plate capable of reducing anode electrolysis remaining rate |
| CN108588764A (en) * | 2018-07-30 | 2018-09-28 | 博敏电子股份有限公司 | A kind of rotation of anode is compeled to hit electrolysis unit |
| CN108754154A (en) * | 2018-06-29 | 2018-11-06 | 肇庆高新区国专科技有限公司 | A method of metal in classification recovery train plate |
| CN108998671A (en) * | 2018-07-30 | 2018-12-14 | 博敏电子股份有限公司 | A method of metal in classification recovery train plate |
| CN112725834A (en) * | 2020-12-23 | 2021-04-30 | 博罗县美兴达科技有限公司 | Direct electrolysis process for solid waste metal powder |
Citations (7)
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| GB145600A (en) * | 1918-07-10 | 1921-01-06 | Goldberg Paul | Improvements in the process of electrolytically separating copper from nickel |
| US4337226A (en) * | 1981-02-11 | 1982-06-29 | The United States Of America As Represented By The Secretary Of The Interior | Recovery of platinum-group metals from ores |
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| CN102108441A (en) * | 2010-12-16 | 2011-06-29 | 惠州市鼎晨实业发展有限公司 | Multiple-step purifying method for precious metals of waste PCB (printed circuit board) |
| CN102108442A (en) * | 2010-12-16 | 2011-06-29 | 广东奥美特集团有限公司 | Method for extracting copper from waste circuit boards |
| CN103409773A (en) * | 2013-07-24 | 2013-11-27 | 浙江华友钴业股份有限公司 | Method for extracting copper and cobalt from copper-cobalt alloy |
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2014
- 2014-07-14 CN CN201410332481.6A patent/CN104152696A/en active Pending
Patent Citations (7)
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| GB145600A (en) * | 1918-07-10 | 1921-01-06 | Goldberg Paul | Improvements in the process of electrolytically separating copper from nickel |
| US4337226A (en) * | 1981-02-11 | 1982-06-29 | The United States Of America As Represented By The Secretary Of The Interior | Recovery of platinum-group metals from ores |
| CN1396281A (en) * | 2002-06-21 | 2003-02-12 | 清华大学 | Process for recovering metal and non-metal materials from copper enriched electronic waste |
| CN101812591A (en) * | 2009-02-20 | 2010-08-25 | 国立云林科技大学 | Method for recovering gold, copper, copper sulfate and copper chloride waste liquid of waste circuit board |
| CN102108441A (en) * | 2010-12-16 | 2011-06-29 | 惠州市鼎晨实业发展有限公司 | Multiple-step purifying method for precious metals of waste PCB (printed circuit board) |
| CN102108442A (en) * | 2010-12-16 | 2011-06-29 | 广东奥美特集团有限公司 | Method for extracting copper from waste circuit boards |
| CN103409773A (en) * | 2013-07-24 | 2013-11-27 | 浙江华友钴业股份有限公司 | Method for extracting copper and cobalt from copper-cobalt alloy |
Non-Patent Citations (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714335A (en) * | 2014-12-05 | 2016-06-29 | 上海奇谋能源技术开发有限公司 | Anode plate capable of reducing anode electrolysis remaining rate |
| CN105714335B (en) * | 2014-12-05 | 2018-02-16 | 上海奇谋能源技术开发有限公司 | A kind of positive plate for reducing anode electrolysis survival rate |
| CN108754154A (en) * | 2018-06-29 | 2018-11-06 | 肇庆高新区国专科技有限公司 | A method of metal in classification recovery train plate |
| CN108588764A (en) * | 2018-07-30 | 2018-09-28 | 博敏电子股份有限公司 | A kind of rotation of anode is compeled to hit electrolysis unit |
| CN108998671A (en) * | 2018-07-30 | 2018-12-14 | 博敏电子股份有限公司 | A method of metal in classification recovery train plate |
| CN112725834A (en) * | 2020-12-23 | 2021-04-30 | 博罗县美兴达科技有限公司 | Direct electrolysis process for solid waste metal powder |
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Application publication date: 20141119 |