CN101597769A - 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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- CN101597769A CN101597769A CNA2009100672417A CN200910067241A CN101597769A CN 101597769 A CN101597769 A CN 101597769A CN A2009100672417 A CNA2009100672417 A CN A2009100672417A CN 200910067241 A CN200910067241 A CN 200910067241A CN 101597769 A CN101597769 A CN 101597769A
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- gold
- strippant
- desorption
- stripping liquid
- virahol
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Abstract
The invention discloses a kind of normal temperature and pressure quick desorption electrolysis method of gold loaded carbon, 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, the heater via additional heat reaches 80 ℃ of recirculation of desorption temperature by carrying golden charcoal, the wash-out gold, go round and begin again and your liquid gold concentration to be lower than 1～2 grams per liter until, desorbing electrolytic end of processing, desorption time are 8～10 hours only, and stripping liquid can be recycled, each use is added sodium hydroxide according to circumstances and is helped the strippant Virahol, guarantees the concentration of strippant; After stripping liquid circulation repeatedly, adopt and reclaim or the refining plant processing; Do not contain prussiate in the stripping liquid, realized efficient, environmental protection, cleaner production.
Description
Technical field
The present invention relates to a kind of gold mine normal temperature and pressure quick desorption electrolysis method of gold loaded carbon.
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 normal temperature and pressure quick desorption electrolysis method of gold loaded carbon 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: Au (CN)
2 -+ e → Au+2CN
-
Ag(CN)
2 -+e→Ag+2CN
-
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: 2CN
-+ O
2+ 4H
2O → 2NH
3+ 2HCO
3 -
OH
-+H
-→H
2O
HCO
3+OH
-→H
2O+CO
3 -
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 (3)
1, a kind of normal temperature and pressure quick desorption electrolysis method of gold loaded carbon, this method are 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.
2, a kind of normal temperature and pressure quick desorption electrolysis method of gold loaded carbon according to claim 1, it is characterized in that: behind the 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%.
3, a kind of normal temperature and pressure quick desorption electrolysis method of gold loaded carbon according to claim 2 is characterized in that: after stripping liquid circulation repeatedly, adopt and reclaim or the refining plant processing, realize recycling.
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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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|---|---|
| CN101597769A true CN101597769A (en) | 2009-12-09 |
| CN101597769B CN101597769B (en) | 2011-04-06 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831669A (en) * | 2010-05-25 | 2010-09-15 | 潞西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 |
| CN103194614A (en) * | 2013-03-22 | 2013-07-10 | 紫金矿业集团股份有限公司 | Low-grade copper-bearing gold ore dump leaching-carbon adsorption production method |
| 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 |
| CN113430581A (en) * | 2021-06-10 | 2021-09-24 | 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 |
Family Cites Families (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
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831669A (en) * | 2010-05-25 | 2010-09-15 | 潞西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 |
| CN103194614A (en) * | 2013-03-22 | 2013-07-10 | 紫金矿业集团股份有限公司 | Low-grade copper-bearing gold ore dump leaching-carbon adsorption production method |
| 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 |
| CN113430581A (en) * | 2021-06-10 | 2021-09-24 | 烟台鑫海矿业研究设计有限公司 | Heating desorption electrolysis all-in-one |
| 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 |
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|---|---|
| CN101597769B (en) | 2011-04-06 |
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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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