CN1912156A - Method for extracting gold (I) from enriched alkaline cyanide gold immersing liquid - Google Patents
Method for extracting gold (I) from enriched alkaline cyanide gold immersing liquid Download PDFInfo
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- CN1912156A CN1912156A CNA2006100371666A CN200610037166A CN1912156A CN 1912156 A CN1912156 A CN 1912156A CN A2006100371666 A CNA2006100371666 A CN A2006100371666A CN 200610037166 A CN200610037166 A CN 200610037166A CN 1912156 A CN1912156 A CN 1912156A
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- aurum
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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
Abstract
The invention discloses a method for extracting aurum in alkali cyaniding enrichment aurum dipping valuable liquid. It includes the following steps: mixing modified tertiary amine extracting agent, modifying agent, and thinner to make organic phase; contacting the organic phase with alkali cyaniding aurum dipping valuable liquid to take extraction to Au(CN)2; taking reverse extraction to the organic phase with reverse extraction solution and transferring aurum cyanogen anionic complex into reverse extraction liquid, the aurum dipping solution would be recycled, and the organic phase after taking reverse extraction would be circularly used. The invention has the advantages of high efficiency, simple technology and energy saving.
Description
Technical field
The present invention relates to smelting technology, relate in particular to the method for the gold in the expensive liquid of cyanide gold-leaching being carried out extracting and separating.
Background technology
In difficulty choosing, difficult smelting and low-grade gold, in the smelting of gold, still mainly adopt the cyanide process extract technology at present.How efficiently extracting and enriching gold (I) from the expensive liquid of alkaline cyanide gold-leaching is the focus that people pay close attention to always.Though adopt the tertiary amines extraction agent, the percentage extraction [document 1-2] that extracting gold obtains higher in acidity or neutral solution.But,, when adopting the tertiary amines extraction agent to extract, be difficult to accomplish the end in view for this alkalescence gold leachate because of the expensive liquid of resulting cyanide gold-leaching in the actual gold smelting generally all is basic solution.Therefore, adopt the tertiary amines extraction agent that the gold in the alkaline gold leachate (I) is carried out extracting and enriching, must improve or modification this extraction system,, make its extracting gold (I) under alkaline condition obtain effect preferably so that improve the extraction equilibrium pH value of tertiary amines extraction agent; Also make simultaneously the back extraction of gold be easy to carry out, thereby be the separation and concentration of gold (I) in the expensive liquid of cyanide gold-leaching, a kind of practicable novel method and new technology are provided.
N235 is a kind of tertiary amine basic extractant, often with R
3N represents.Advantages such as cause extracts uranium, tungsten in sulfate medium saturated capacity is big, speed is fast, and obtain than widespread use.Though it is the N235 extraction agent has higher percentage extraction to the gold in acidity or the neutral medium (I), very low to the percentage extraction of the aurum cyanogen anionic complex in the alkaline medium.At present, in the cyanide gold-leaching technology of industrial employing, your liquid the cyaniding of resulting gold leaches in, and gold exists in the mode of aurum cyanogen anionic complex, and the pH value of solution generally is higher than 9, adopts single N235 extraction agent to extract, and can't accomplish the end in view.
Reference:
[1] Wang Wenming, Li Junheng, Zhang Jianmin etc. the back extraction of three-n-octyl amine extracting gold and gold. gold, 1987, (4): 52
[2] water hold quiet, Yang Tianjian, Bin Wanda. use TOA-CCl
4Gold in the extraction hydrochloric acid medium. precious metal, 1998,19 (2): 34
Summary of the invention
Existing problem during at the gold (I) of existing tertiary amines extraction agent in the expensive liquid of the alkaline cyanide gold-leaching of extraction, the invention provides the method for gold (I) in the expensive liquid of a kind of extracting and enriching alkalescence cyanide gold-leaching, overcome in the past amine extractant under alkaline condition to the low problem of gold (I) percentage extraction.
For reaching above-mentioned purpose, patent of the present invention adopts following technical scheme:
The method of gold (I) is in the expensive liquid of extracting and enriching of the present invention alkalescence cyanide gold-leaching: with enhanced tertiary amine extraction agent, modification agent and thinner with 1～90: 1～50: 1～98 volume ratio is mixed, and forms the organic phase of extraction system; Organic phase and the expensive liquid of alkaline cyanide gold-leaching mix with 1: 1～50 volume ratio and contact, to the Au in the gold immersing liquid (CN)
2 -Extract, make the aurum cyanogen anionic complex Au (CN) in the expensive liquid of alkaline cyanide gold-leaching
2 -Be extracted in the organic phase; Load the organic phase of aurum cyanogen anionic complex mix to contact with the reverse-extraction agent alkaline solution again and carry out back extraction, aurum cyanogen anionic complex is transferred in the strip liquor, the gold leaching solution reuse after the raffinate continues to soak gold, the organic phase after the back extraction also recycles.
Sodium phosphate, sodium hydrogen phosphate or sodium dihydrogen phosphate with 0.1～5.0 mol, or the potassium salt soln of the phosphoric acid of respective concentration is as properties-correcting agent, with properties-correcting agent and tertiary amine extraction agent according to 0.01～0.1: 1 volume ratio is mixed, and then with isopyknic concentration be that resulting organic phase is described enhanced tertiary amine extraction agent behind the sodium hydrogen carbonate solution contact equilibrium of 0.01～0.5 mol.As preferred version, described tertiary amine extraction agent select for use in trialkyl tertiary amine N 235, trioctylamine, TNA trinonylamine or the three certain herbaceous plants with big flowers amine any, two or more mixture.
Described modification agent is that the C atomicity in the molecule is 7～12 straight chain alcohol or branched-chain alcoho, a kind of, two or more alcohol mixture in preferred enanthol, octanol, nonyl alcohol, certain herbaceous plants with big flowers alcohol, undecyl alcohol, the lauryl alcohol.
Described thinner is dissolved in wherein organic solvent for making enhanced tertiary amine and long-chain alcohol, preferred kerosene or sulfonated kerosene or anthracite oil, or two kinds or three kinds of mixtures in them.
As preferred plan, in the described organic phase, the volume ratio of enhanced tertiary amine extraction agent, modification agent, thinner is: 5～50: 1～20: 40～90.
The alkaline golden cyanogen leach liquor of gained contained gold-cyanide complex when the expensive liquid of described alkaline cyanide gold-leaching leached auriferous Gold Ore breeze or auriferous slag for adopting cyanide process; The volume ratio of described organic phase and the expensive liquid of alkaline cyanide gold-leaching is preferably 1: 20.
Described reverse-extraction agent is a kind of or mixed ammonium/alkali solutions more than two kinds and two kinds in sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution, the solution of potassium carbonate, and the concentration of the hydroxide ion in the alkaline solution is 0.01～5.0 mol.
Experimental results show that, the present invention is the cyanide gold-leaching liquid (being feed liquid) of 1.0～40.0mg/L to the starting point concentration of gold (I), the volume ratio that adopts organic phase and feed liquid is V (o): V (a)=1: 3, organic phase is made up of 20% modification N235+5% n-Octanol+75% kerosene, through one-level extraction, can reach more than 99% to the percentage extraction of the gold in the feed liquid (I); When carrying out back extraction with sodium hydroxide solution, back extraction ratio can reach more than 95%.The present invention has the simple and direct characteristics such as quick, energy-conservation of extraction efficiency height, technology.
Embodiment
Embodiment 1:
The sodium radio-phosphate,P-32 solution that with concentration is 3.0 mol mixes by 0.05: 1 volume ratio with N235, and then with isopyknic concentration be that resulting organic phase is described enhanced tertiary amine extraction agent behind the sodium hydrogen carbonate solution contact equilibrium of 0.2 mol.
With modification N235, n-Octanol, kerosene by 20: 5: 75 volume ratio mixing as organic phase, the expensive liquid of alkaline cyanide gold-leaching that is 10.0mg/L with 10 parts of organic phases and 30 parts of initial gold (I) concentration mixes, extraction is 10 minutes in extraction tank, leave standstill phase-splitting then, gold (I) concentration is 0.15mg/L in the raffinate; Load organic phases is used the sodium hydroxide solution back extraction of 10 parts of 0.2mol/L again, and the concentration that can get gold (I) in the strip liquor is 28.95mg/L, and gold (I) is by enrichment in strip liquor.
Embodiment 2:
The sodium hydrogen phosphate solution that with concentration is 1.0 mol mixes by 0.05: 1 volume ratio with N235, and then with isopyknic concentration be that resulting organic phase is described enhanced tertiary amine extraction agent behind the sodium hydrogen carbonate solution contact equilibrium of 0.2 mol.
With modification N235, octanol, kerosene by 20: 5: 75 volume ratio mixing as organic phase, the expensive liquid of alkaline cyanide gold-leaching that is 20.0mg/L with 10 parts of organic phases and 20 parts of initial gold (I) concentration mixes, extraction is 10 minutes in extraction tank, leave standstill phase-splitting then, gold (I) concentration is 0.23mg/L in the raffinate; Load organic phases is used the sodium hydroxide back extraction of 10 parts of 0.2mol/L again, and the concentration that can get gold (I) in the strip liquor is 37.58mg/L, and gold (I) is by enrichment in strip liquor.
Embodiment 3:
The sodium dihydrogen phosphate that with concentration is 0.8 mol mixes by 0.05: 1 volume ratio with N235, and then with isopyknic concentration be that resulting organic phase is described enhanced tertiary amine extraction agent behind the sodium hydrogen carbonate solution contact equilibrium of 0.4 mol.
With modification N235, octanol, anthracite oil, the volume ratio mixings of pressing 20: 5: 75 are as organic phase, the expensive liquid of alkaline cyanide gold-leaching that is 5.0mg/L with 10 parts of organic phases and 40 parts of initial gold (I) concentration mixes, extraction is 10 minutes in extraction tank, leave standstill phase-splitting then, gold (I) concentration is 0.12mg/L in the raffinate, and percentage extraction is 99.4%; Load organic phases is used the sodium hydroxide back extraction of 10 parts of 0.2mol/L again, and the concentration that can get gold (I) in the strip liquor is 18.68mg/L.Gold (I) is by enrichment in strip liquor.
Embodiment 4:
The sodium dihydrogen phosphate that with concentration is 0.8 mol mixes by 0.05: 1 volume ratio with trioctylamine, and then with isopyknic concentration be that resulting organic phase is described enhanced tertiary amine extraction agent behind the sodium hydrogen carbonate solution contact equilibrium of 0.4 mol.
With modification trioctylamine, nonyl alcohol, sulfonated kerosene by 25: 5: 70 volume ratio mixing as organic phase; The expensive liquid of alkaline cyanide gold-leaching that is 5.0mg/L with 10 parts of organic phases and 40 parts of initial gold (I) concentration mixes, and extraction is 10 minutes in extraction tank, leaves standstill phase-splitting then, and gold (I) concentration is 0.12mg/L in the raffinate, and percentage extraction is 99.4%; Load organic phases is used the sodium hydroxide back extraction of 10 parts of 0.2mol/L again, and the concentration that can get gold (I) in the strip liquor is 18.68mg/L.Gold (I) is by enrichment in strip liquor.
Claims (10)
1, the method for gold (I) in the expensive liquid of a kind of extracting and enriching alkalescence cyanide gold-leaching is characterized in that: with enhanced tertiary amine extraction agent, modification agent and thinner with 1～90: 1～50: 1～98 volume ratio is mixed, and forms the organic phase of extraction system; Organic phase and the expensive liquid of alkaline cyanide gold-leaching mix with 1: 1～50 volume ratio and contact, to the Au in the gold immersing liquid (CN)
2 -Extract, make the aurum cyanogen anionic complex Au (CN) in the expensive liquid of alkaline cyanide gold-leaching
2 -Be extracted in the organic phase; Load the organic phase of aurum cyanogen anionic complex mix to contact with the reverse-extraction agent alkaline solution again and carry out back extraction, aurum cyanogen anionic complex is transferred in the strip liquor, the gold leaching solution reuse after the raffinate continues to soak gold, the organic phase after the back extraction also recycles.
2, method according to claim 1, it is characterized in that: with sodium phosphate, sodium hydrogen phosphate or the sodium dihydrogen phosphate of 0.1～5.0 mol, or the potassium salt soln of the phosphoric acid of respective concentration is as properties-correcting agent, with properties-correcting agent and tertiary amine extraction agent according to 0.01～0.1: 1 volume ratio is mixed, and then with isopyknic concentration be that resulting organic phase is described enhanced tertiary amine extraction agent behind the sodium hydrogen carbonate solution contact equilibrium of 0.01～0.5 mol.
3, method according to claim 2 is characterized in that: described tertiary amine extraction agent be in N235, trioctylamine, TNA trinonylamine or the three certain herbaceous plants with big flowers amine any, two or more mixture.
4, method according to claim 1 is characterized in that: described modification agent is that the C atomicity in the molecule is 7～12 straight chain alcohol or branched-chain alcoho.
5, method according to claim 4 is characterized in that: described modification agent is a kind of, two or more the alcohol mixture in enanthol, octanol, nonyl alcohol, certain herbaceous plants with big flowers alcohol, undecyl alcohol, the lauryl alcohol.
6, method according to claim 1 is characterized in that: described thinner is dissolved in wherein organic solvent for making enhanced tertiary amine and long-chain alcohol.
7, method according to claim 6 is characterized in that: described thinner is kerosene or sulfonated kerosene or anthracite oil, or two kinds or three kinds of mixtures in them.
8, method according to claim 1, it is characterized in that: described reverse-extraction agent is a kind of or mixed ammonium/alkali solutions more than two kinds and two kinds in sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution, the solution of potassium carbonate, and the concentration of the hydroxide ion in the alkaline solution is 0.01～5.0 mol.
9, method according to claim 1 is characterized in that: in the described organic phase, the volume ratio of tertiary amine extraction agent, modification agent, thinner is: 5～50: 1～25: 20～80.
10, method according to claim 1 is characterized in that: the alkaline golden cyanogen leach liquor of gained when the expensive liquid of described alkaline cyanide gold-leaching leaches auriferous Gold Ore breeze or auriferous slag for adopting cyanide process, contain gold-cyanide complex.
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| CNB2006100371666A CN100392122C (en) | 2006-08-23 | 2006-08-23 | Method for extracting gold (I) from enriched alkaline cyanide gold immersing liquid |
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| CNB2006100371666A CN100392122C (en) | 2006-08-23 | 2006-08-23 | Method for extracting gold (I) from enriched alkaline cyanide gold immersing liquid |
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| CN1912156A true CN1912156A (en) | 2007-02-14 |
| CN100392122C CN100392122C (en) | 2008-06-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313324A (en) * | 2014-10-23 | 2015-01-28 | 云南大学 | Method for extracting palladium from alkaline aurocynide solution by using dodecyl dimethyl-2-phenoxyacetic ammonium bromide |
| CN105692752A (en) * | 2016-01-19 | 2016-06-22 | 东北大学 | Emulsion liquid membrane for extracting copper and cyanide in cyanide waste water and use method thereof |
| CN106404702A (en) * | 2016-10-25 | 2017-02-15 | 福建紫金矿冶测试技术有限公司 | Detection method for quickly determining gold content in cyanide solution |
| CN116555568A (en) * | 2023-05-17 | 2023-08-08 | 四川长晏科技有限公司 | Method for extracting metal ions in strong acid system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022140770A1 (en) * | 2020-12-21 | 2022-06-30 | Northwestern University | SUPRAMOLECULAR GOLD STRIPPING FROM ACTIVATED CARBON USING α-CYCLODEXTRIN |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4774003A (en) * | 1983-08-25 | 1988-09-27 | University Of Utah | Ion exchange extraction of metallic and non-metallic anions by control of the basicity of amine extractants |
| ZA933990B (en) * | 1992-06-17 | 1994-01-05 | Mintek | Gold and silver recovery and analysis using supported liquid membranes |
| US5968364A (en) * | 1993-03-16 | 1999-10-19 | Henkel Corporation | Process for the removal of toxic cyanide and heavy metal species from alkaline solutions |
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2006
- 2006-08-23 CN CNB2006100371666A patent/CN100392122C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313324A (en) * | 2014-10-23 | 2015-01-28 | 云南大学 | Method for extracting palladium from alkaline aurocynide solution by using dodecyl dimethyl-2-phenoxyacetic ammonium bromide |
| CN104313324B (en) * | 2014-10-23 | 2016-06-08 | 云南大学 | By dodecyl dimethyl-2-benzene oxygen ethyl phosphonium bromide ammonium method of extraction of palladium from alkaline cyanide liquid |
| CN105692752A (en) * | 2016-01-19 | 2016-06-22 | 东北大学 | Emulsion liquid membrane for extracting copper and cyanide in cyanide waste water and use method thereof |
| CN105692752B (en) * | 2016-01-19 | 2018-08-03 | 东北大学 | Emulsion liquid film for extracting cyanogen Cu in waste water and cyanide and its application method |
| CN106404702A (en) * | 2016-10-25 | 2017-02-15 | 福建紫金矿冶测试技术有限公司 | Detection method for quickly determining gold content in cyanide solution |
| CN116555568A (en) * | 2023-05-17 | 2023-08-08 | 四川长晏科技有限公司 | Method for extracting metal ions in strong acid system |
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Granted publication date: 20080604 Termination date: 20120823 |