CN101597769B - Normal temperature and pressure quick desorption electrolysis method of gold loaded carbon - Google Patents
Normal temperature and pressure quick desorption electrolysis method of gold loaded carbon Download PDFInfo
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- CN101597769B CN101597769B CN2009100672417A CN200910067241A CN101597769B CN 101597769 B CN101597769 B CN 101597769B CN 2009100672417 A CN2009100672417 A CN 2009100672417A CN 200910067241 A CN200910067241 A CN 200910067241A CN 101597769 B CN101597769 B CN 101597769B
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- desorption
- gold
- solution
- loaded carbon
- strippant
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- 238000003795 desorption Methods 0.000 title claims abstract description 53
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 37
- 239000010931 gold Substances 0.000 title claims abstract description 37
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 10
- 229910052799 carbon Inorganic materials 0.000 title abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 25
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000003487 electrochemical reaction Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 28
- 239000003610 charcoal Substances 0.000 claims description 23
- 230000000694 effects Effects 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 4
- 230000000536 complexating effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 150000002500 ions Chemical class 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000003480 eluent Substances 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 5
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000000202 analgesic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 150000002343 gold Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
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Classifications
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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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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a normal pressure quick desorption electrolysis method of gold loaded carbon, comprising the following steps: a desorption agent containing 2-5% of sodium hydroxide and 5-10% of an auxiliary desorption agent isopropanol is subjected to heating cycle in an entire process system through pumps; the desorption temperature is 80 DEG C and the pressure is 0.1MPa;the gold loaded carbon is desorbed so that the gold enters eluent in the form of complex ions to obtain pregnant solution; the pregnant solution enters an electrolyzer and undergoes electrochemical reaction in the presence of applied voltage so that the gold is deposited and precipitated at the cathode, thus recycling the gold; electrolyzed desorption solution reaches the desorption temperature of 80 DEG C after a heater supplies energy and then circularly passes through the gold loaded carbon to elute the gold in cycles until the concentration of the gold in the pregnant solution is lower than 1-2g/L, then the desorption electrolysis process is completed; the desorption time is only 8-10h; the desorption solution can be reused and can be replenished with the sodium hydroxide and the auxiliary desorption agent isopropanol each time according to the conditions to ensure the concentration of the desorption solution; after being cycled for multiple times, the desorption solution is recycled or processed by purification devices; the desorption solution contains no cyanide, thereby realizing efficient, environment-friendly and clean production.
Description
Technical field
The present invention relates to a kind of gold mine and carry golden charcoal normal pressure quick desorption electrolysis method.
Background technology
The gold loaded carbon desorption technology of market and mine use now has by the temperature, pressure branch: press desorbing electrolytic, high temperature desorb low-temperature electrolytic three classes in normal pressure and temperature desorbing electrolytic, the high temperature.
Carry golden charcoal normal pressure and temperature desorbing electrolytic technology, desorption temperature is 95～100 ℃, normal pressure, pressure is 0.1MPa, and stripping liquid is sodium cyanide (NaCN) 2%+ sodium hydroxide (NaOH) 1%, and desorb cycle is more than 36 hours, its advantage is: facility investment is little, operational safety; Shortcoming is: desorption time is long, and production efficiency is low, the energy consumption height.
Carry and press desorbing electrolytic technology in the golden charcoal high temperature, be total system pressure-bearing desorbing electrolytic technology, it is the late nineteen eighties in last century by the exploitation of Australian COMO ENGINEES company, this gold loaded carbon desorption electrolysis process is at 150 ℃, 0.5Mpa desorb and under uniform temp and pressure, carry out electrolysis under the pressure, do not used the toxicant sodium cyanide, and desorption time 8h only; Add preheating and loading and unloading charcoal time, about 10～the 12h of gold and silver electrolysis time, save time about 50% than normal pressure desorb equality of temperature electrolysis process, do not use sodium cyanide that gold loaded carbon desorption electrolysis cost is reduced than normal pressure desorbing electrolytic technology, because above-mentioned advantage, total system pressing and desorption electrolysis process a lot of mines have at home and abroad obtained widespread use.Its shortcoming is: facility investment is big, operational requirement strictness, pressurized vessel maintenance and troublesome maintenance.
Carry golden charcoal high temperature desorb low-temperature electrolytic technology, 120～135 ℃ of its desorption temperatures, well heater, desorb column pressure are 0.3～0.35MPa, by heat exchange and water-cooled your liquid temp are reduced to about 80 ℃ and enter electrolytic tank electrolysis.Stripping liquid is sodium cyanide (NaCN) 2%+ sodium hydroxide (NaOH) 4%, and desorb cycle is 15～18 hours.Its advantage is: facility investment is medium, and the production cycle is longer slightly than pressing desorbing electrolytic in the high temperature; Its shortcoming is: the table of equipment number is many, complicated operation, and heat exchange and water-cooled process energy consumption height, electrolyzer is open, the liquid evaporation amount is big.
In sum, existing gold loaded carbon desorption electrolysis process has only and shorten desorption time by the pressurization of heating and enhance productivity, but the pressurization of heating makes that the charcoal wearing and tearing are big that facility investment is big, and operational requirement is meticulous, energy consumption height, production cost height.Normal pressure equipment is little to the charcoal influence, and metal balance is good, but desorption time is long generally greater than 36 hours, and production efficiency is low.
Summary of the invention
The charcoal wearing and tearing that the objective of the invention is in order to solve the existing pressurization gold loaded carbon desorption electrolysis process existence of heating are big, facility investment is big, operational requirement is meticulous, energy consumption height, the problem that production cost is high, and the desorption time that normal pressure gold loaded carbon desorption electrolysis process exists is long, the problem that production efficiency is low, and a kind of year golden charcoal normal pressure quick desorption electrolysis method is provided, do not contain prussiate in this method in the employed stripping liquid, realized efficient, environmental protection, cleaner production.
The processing parameter that adopts in the present invention's the method is: desorption temperature is 80 ℃, and what contain 2～5% sodium hydroxide and 5～10% in the strippant helps the strippant Virahol, and pressure 0.1MPa, desorption time only are 8～10 hours.
The present invention's method is: will contain 2～5% sodium hydroxide and 5～10% the strippant that helps the strippant Virahol, by pump, heating cycle in whole process system, desorption temperature is 80 ℃, pressure 0.1MPa, golden charcoal is carried in desorb, makes gold enter elutriant with complexing ion, your liquid that obtains, enter electrolyzer, electrochemical reaction takes place down in alive outside effect, makes gold separate out in cathodic deposition, thereby reclaims gold; Stripping liquid after the electrolysis, heater via additional heat reach 80 ℃ of recirculation of desorption temperature by carrying golden charcoal, and the wash-out gold goes round and begins again until your liquid gold concentration very low (generally being lower than 1～2 grams per liter), desorbing electrolytic end of processing.Stripping liquid can be recycled, each use is added sodium hydroxide according to circumstances and is helped the strippant Virahol, guarantees that concentration sodium hydroxide is 2～5% and to help the concentration of strippant Virahol be 5～10%, after stripping liquid circulation repeatedly, can adopt and reclaim or the refining plant processing, realize recycling.
Principle of the present invention is: under the condition of alkalescence and heating, no cyanogen contain the stripping liquid that gold helps the strippant Virahol, broken the balance of year golden charcoal ADSORPTION OF GOLD, make that gold is that parent enters into stripping liquid to help the chemical bond on the strippant, help the strippant Virahol to also help simultaneously to carry organic material of macromole that golden charcoal adsorbs in adsorption process such as xanthate, No. two wet goods to enter stripping liquid, form better desorption effect; Contain the stripping liquid of high density gold, enter electrolyzer, electrolytic deposition reclaims precious metals such as gold and silver.The electrochemical reaction of its generation is:
Reactional equation:
2H
2O+2e→H
2+2OH
-
Anodic reaction: 4OH
--4e → O
2+ 2H
2O
CN
-+2OH
--2e→CNO
-+H
2O
2CNO
-+4OH
--6e→2CO
2+N
2+H
2O
Solution reaction:
OH
-+H
-→H
2O
Beneficial effect of the present invention is as follows:
1, patent of the present invention adopts unique desorb medicament that helps the strippant Virahol that contains, at 2～5%NaOH, help the concentration 5～10% of strippant Virahol, the desorbing electrolytic temperature is 80 ℃, desorption rate is fast, desorption temperature is low, desorption time is only used 8～10 hours, a desorb flow process contains loading and unloading charcoal, heating zone total 12 hours, the poor charcoal grade＜100g/T of desorb, reach with high pressure in 150 ℃ of warm desorption techniques, desorption effect that the 0.5Mpa condition is the same, thereby realized that the no cyanogen fast desorption under the normal pressure carries golden charcoal.
2, in the method for the present invention, no heat exchange, with short production cycle, under normal pressure 0.1Mpa, 80 ℃ of processing condition, reach with high pressure in 150 ℃ of warm desorption techniques, desorption effect that the 0.5Mpa condition is the same, and stripping liquid need not to be heated to 150 ℃, stripping liquid and ambient temperature differences are little, and the desorption process energy consumption is little, and analgesic energy consumption and thermosteresis are little, thereby this process energy consumption is low, energy-conservation more environmental protection.
3, need not add prussiate in the technological process of the present invention and only need add sodium hydroxide and help the strippant Virahol, help that the strippant Virahol is recyclable to be recycled.Conventional stripping liquid need add sodium cyanide and two kinds of medicaments of sodium hydroxide when preparing, and has both improved the desorbing electrolytic cost, is unfavorable for environmental protection again.
4, parameter of the present invention is: 80 ℃ of desorption temperatures, non-cyanide desorption agent: 2～5%NaOH, help strippant isopropyl alcohol concentration 5～10%, pressure 0.1MPa, desorption time only 8～10 hours, production cycle＜12 hour.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
See also shown in Figure 1, carry the golden charcoal desorb post 1 of packing into, in circulation heating tank 2 configuration 2～5%NaOH, help the stripping liquid of strippant isopropyl alcohol concentration 5～10%, then by pump 3, heating cycle stripping liquid in whole process system, desorption temperature is 80 ℃, pressure 0.1MPa, the stripping liquid wash-out of heating carries golden charcoal, makes gold enter elutriant with complexing ion, your liquid that obtains, enter electrolyzer 4, electrochemical reaction takes place down in alive outside effect, makes gold separate out in cathodic deposition, thereby reclaims gold; Stripping liquid after the electrolysis returns circulation heating tank 2 heater via additional heat again and reaches desorption temperature recirculation by carrying golden charcoal, and the wash-out gold goes round and begins again until your liquid gold concentration very low (generally being lower than 1～2 grams per liter), desorbing electrolytic end of processing.Stripping liquid can be recycled, each use is added sodium hydroxide according to circumstances and is helped the strippant Virahol, guarantees that concentration sodium hydroxide is 2～5% and to help the concentration of strippant Virahol be 5～10%, after stripping liquid circulation repeatedly, can adopt and reclaim or refining plant 5 processing, realize recycling.
Claims (1)
1. one kind carries golden charcoal normal pressure quick desorption electrolysis method, and this method is to contain 2～5% sodium hydroxide and 5～10% the strippant that helps the strippant Virahol, to pass through pump, heating cycle in whole process system, desorption temperature is 80 ℃, pressure 0.1MPa, and golden charcoal is carried in desorb, make gold enter elutriant with complexing ion, your liquid that obtains enters electrolyzer, and electrochemical reaction takes place down in alive outside effect, make gold separate out, thereby reclaim gold in cathodic deposition; Stripping liquid after the electrolysis, heater via additional heat reach 80 ℃ of recirculation of desorption temperature by a year golden charcoal, the wash-out gold, and going round and beginning again is lower than 1～2 grams per liter until your liquid gold concentration, the desorbing electrolytic end of processing.
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|---|---|---|---|
| CN2009100672417A CN101597769B (en) | 2009-07-06 | 2009-07-06 | Normal temperature and pressure quick desorption electrolysis method of gold loaded carbon |
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|---|---|---|---|
| CN2009100672417A CN101597769B (en) | 2009-07-06 | 2009-07-06 | Normal temperature and pressure quick desorption electrolysis method of gold loaded carbon |
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| Publication Number | Publication Date |
|---|---|
| CN101597769A CN101597769A (en) | 2009-12-09 |
| CN101597769B true CN101597769B (en) | 2011-04-06 |
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| CN2009100672417A Active CN101597769B (en) | 2009-07-06 | 2009-07-06 | Normal temperature and pressure quick desorption electrolysis method of gold loaded carbon |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831669B (en) * | 2010-05-25 | 2011-11-09 | 芒市海华开发有限公司 | High-temperature cyanogen-free gold loaded carbon desorption system and control method thereof |
| CN102517452A (en) * | 2011-12-09 | 2012-06-27 | 紫金矿业集团股份有限公司 | Method for recovering gold from gold-containing tail liquid produced by gold-loaded carbon desorption and electrodeposition technology |
| CN103194614B (en) * | 2013-03-22 | 2015-10-21 | 紫金矿业集团股份有限公司 | The method that a kind of low-grade copper gold dump leaching-charcoal absorption is produced |
| CN104862476A (en) * | 2015-05-28 | 2015-08-26 | 长春黄金研究院 | Desorption method for high-silver-content and difficultly-desorbed gold-loaded carbon |
| CN104988329A (en) * | 2015-06-06 | 2015-10-21 | 长春黄金研究院 | Energy-saving gold-carried carbon desorption electrolysis method |
| CN108660482A (en) * | 2018-02-26 | 2018-10-16 | 山东黄金归来庄矿业有限公司 | It is adsorbed in the extracting method of the noble metal of column-shaped active carbon |
| CN113430581B (en) * | 2021-06-10 | 2022-08-30 | 烟台鑫海矿业研究设计有限公司 | Heating desorption electrolysis all-in-one |
| CN115350695A (en) * | 2022-08-17 | 2022-11-18 | 长春黄金研究院有限公司 | Gold-bearing powder carbon separation and recovery method generated by gold-bearing carbon desorption electrolysis process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465726A (en) * | 2002-06-28 | 2004-01-07 | 贵州核工业新原实业有限责任公司 | Cyanogen free stripping process for golde-carried carbon |
-
2009
- 2009-07-06 CN CN2009100672417A patent/CN101597769B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465726A (en) * | 2002-06-28 | 2004-01-07 | 贵州核工业新原实业有限责任公司 | Cyanogen free stripping process for golde-carried carbon |
Non-Patent Citations (1)
| Title |
|---|
| S. Ubaldini et al.《Gold stripping by hydro-alcoholic solutions from activated carbon: Experimental results and data analysis by a semi-empirical model》.《Hydrometallurgy》.2006,(第81期),40-44. * |
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| CN101597769A (en) | 2009-12-09 |
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Address after: 130012 Changchun Gold Research Institute, No. 6760 nanhu road, Chaoyang District, Changchun, Jilin Patentee after: Changchun Gold Research Institute Co., Ltd. Address before: 130012 No. 6760 nanhu road, Jilin City, Changchun Province Patentee before: Changchun Gold Research Institute |
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