CN1263166A - Treatment method of reusable cyanide gold-leaching lean solution - Google Patents
Treatment method of reusable cyanide gold-leaching lean solution Download PDFInfo
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- CN1263166A CN1263166A CN99112123A CN99112123A CN1263166A CN 1263166 A CN1263166 A CN 1263166A CN 99112123 A CN99112123 A CN 99112123A CN 99112123 A CN99112123 A CN 99112123A CN 1263166 A CN1263166 A CN 1263166A
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- organic phase
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- cyanide gold
- barren solution
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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
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Abstract
The treatment method of reusing cyanide gold-extracting barren liquor is characterized by adopting solent extraction process to remove the metal unfavourable for extracting gold, using organic amine as extracting agent, high-carbon alcohol as additive and sulfonated kerosene as diluent, utilizing them to form organic phase according to a certain proportion, making the organic phase contact with the canide gold-extracting barrent liquor and making the metal complex anions be extracted into organic phase, and making the metal-loaded organic phase contact with back-extraction agent alkali, and transferring the metal into back-extraction fluid. The treated cyanide gold-extracting barren liquor and organic phase can be cyclically used, the invented method is simple in technological process, low in cost and good in treatment effect.
Description
The invention relates to a method for treating a reusable cyanide gold-leaching barren solution, in particular to a method for treating the cyanide gold-leaching barren solution by using an extraction method.
At present, the treatment of cyanide gold-leaching barren solution adopts a chemical precipitation method, which has complex process, higher cost and undesirable treatment effect.
The invention aims to overcome the defects of the prior art and provides a treatment method for reusing cyanide gold leaching barren solution, which has the advantages of simple process, low cost and good treatment effect.
The aim of the invention can be achieved by the following measures, and the treatment method of the reusable cyanide gold-leaching barren solution is characterized in that the cyanide gold-leaching barren solution is subjected to a solvent extraction method to remove metals harmful to gold leaching, the solvent extraction method uses organic amine as an extracting agent, high-carbon alcohol as an additive and sulfonated kerosene as a diluent to form an extraction organic phase according to a proportion, the organic phase is contacted with the cyanide gold-leaching barren solution to extract metal complex anions into the organic phase, and the treated cyanide gold-leaching barren solution is recycled. The metal-loaded organic phase is contacted with a stripping agent alkali to transfer the metal into a stripping solution, and the organic phase is recycled.
The organic amine, the high-carbon alcohol and the sulfonated kerosene are respectively 3-50%, 2-45% and 5-95% in volume percentage, the optimal volume percentage is respectively 10-30%, 5-30% and 50-70%, the PH of the cyaniding gold leaching barren solution is 8-14 in the extraction process, and the organic amine can be alkyl tertiary amine, quaternary ammonium salt and alkyl secondary amine. The higher alcohol can be octal, isooctyl alcohol, and decyl alcohol. The stripping agent is alkali, and the alkali can be sodium hydroxide solution, potassium hydroxide solution, and lithium hydroxide solution.
Compared with the prior art, the invention has the following advantages: the extraction method is adopted, so that the treatment process of the cyaniding gold leaching barren solution is simple, the cost is low, and the treatment effect is good. And the cyanide gold leaching barren solution treated by the extraction method can be recycled, zero discharge of cyanide-containing wastewater is realized, and the pollution of the cyanide-containing wastewater to the environment is radically treated.
Description of the drawings: the attached figure is a process flow chart of a treatment method for reusing cyanide gold leaching barren solution.
The present invention is described in detail below:
organic amine is used as an extracting agent, high-carbon alcohol is used as an additive, sulfonated kerosene is used as a diluent, an extraction organic phase is formed according to a proportion, and the organic phase is contacted with a cyanide gold leaching barren solution, so that metal complex anions are extracted into the organic phase. The metal-loaded organic phase is contacted with a stripping agent to transfer the metal into a stripping solution, and the organic phase is recycled. The organic amine can be tertiary alkyl amine, quaternary ammonium salt, secondary alkyl amine, and the higher alcohol can be octal, isooctyl alcohol, and decyl alcohol. The stripping agent is alkali, and the alkali can be sodium hydroxide solution, potassium hydroxide solution, and lithium hydroxide solution.
The following is the reaction mechanism for extracting metals from tertiary alkyl amines, which is an anion exchange process.
The reaction mechanism of the back extraction is as follows:
adding acid into the back extraction solution for enriching the metal copper and zinc to adjust the pH value, then carrying out electrolysis, separating out the metal, and recycling the solution after electrodeposition. The reaction equation for electrodeposition is:
anode:
cathode:
example 1
Taking 3% of alkyl tertiary amine, 2% of octa-carbon alcohol and 95% of sulfonated kerosene according to volume percentage, uniformly mixing to form an extraction organic phase, contacting the extraction organic phase with cyaniding gold leaching barren solution with the PH value of 8, extracting complex anions of Cu and Zn into the organic phase, recycling the treated cyaniding gold leaching barren solution, contacting the metal-loaded organic phase with a back-extraction agent sodium hydroxide solution, transferring the metal into back-extraction liquid, and recycling the organic phase.
Example 2
The method comprises the following steps of taking 10% of alkyl tertiary amine, 5% of octa-carbon alcohol and 85% of sulfonated kerosene according to volume percentage, uniformly mixing to form an extraction organic phase, contacting the extraction organic phase with a cyaniding gold leaching barren solution with a pH value of 14, extracting complex anions of Cu and Zn into the organic phase, recycling the treated cyaniding gold leaching barren solution, contacting the metal-loaded organic phase with a back-extraction agent potassium hydroxide solution, transferring the metal into a back-extraction liquid, and recycling the organic phase.
Example 3
30 percent of secondary alkylamine, 30 percent of isooctanol and 40 percent of sulfonated kerosene are uniformly mixed according to the volume percentage to form an extraction organic phase, the extraction organic phase is contacted with cyaniding gold leaching barren solution with the PH value of 10, so that complex anions of Cu and Zn are extracted into the organic phase, the treated cyaniding gold leaching barren solution is recycled, the organic phase loaded with metal is contacted with a back-extraction agent lithium hydroxide solution, the metal is transferred into back-extraction liquid, and the organic phase is recycled.
Example 4 comprises, by volume, 50% of quaternary ammonium salt, 45% of decanol and 5% of sulfonated kerosene, which are uniformly mixed to form an extraction organic phase, the extraction organic phase is contacted with a cyanide gold leaching barren solution with a pH value of 13, so that complex anions of Cu and Zn are extracted into the organic phase, the treated cyanide gold leaching barren solution is recycled, the metal-loaded organic phase is contacted with a stripping agent sodium hydroxide solution, the metal is transferred into a stripping solution, and the organic phase is recycled.
Example 5 according to the volume percentage contains 3 percent of alkyl tertiary amine, 45 percent of octa-carbon alcohol and 50 percent of sulfonated kerosene, the mixture is evenly mixed to form an extraction organic phase, the extraction organic phase is contacted with cyaniding gold leaching barren solution with the PH value of 8, and the metal Cu and Zn complex anions are extracted into the organic phase. The treated cyaniding gold leaching barren solution is recycled, the organic phase loaded with metal is contacted with a back extractant sodium hydroxide solution, the metal is transferred into a back extraction liquid, and the organic phase is recycled.
Example 6 comprises, by volume, 30% of quaternary ammonium salt, 30% of decanol and 40% of sulfonated kerosene, which are mixed uniformly to form an extraction organic phase, the extraction organic phase is contacted with a cyanide gold leaching barren solution with a pH value of 9, so that complex anions of Cu and Zn are extracted into the organic phase, the treated cyanide gold leaching barren solution is recycled, the organic phase loaded with metal is contacted with a stripping agent sodium hydroxide solution, and the metal is transferred into the organic phase of a stripping solution for recycling.
Claims (6)
1. A process for reusing the lean cyanide gold-leaching liquid features that the organic amine as extractant, high-carbon alcohol as additive and sulfonated kerosene as diluent are proportionally used to form organic phase for extracting the complex metal anions, the organic phase loaded with metal is contacted with alkali as stripping agent to transfer the metal to stripping liquid, and the organic phase is cyclically used.
2. The method for treating the reusable cyanidation gold leaching barren solution according to claim 1, characterized in that the organic amine, the higher alcohol and the sulfonated kerosene are respectively 3-50%, 2-45% and 5-95% in volume percentage.
3. The method for treating the reusable cyanidation gold leaching barren solution according to claim 1 or 2, characterized in that the optimal volume percentage contents of the organic amine, the higher alcohol and the sulfonated kerosene in the organic phase are respectively 10-30%, 5-30% and 50-70%.
4. The method for treating the reusable cyanide gold-leaching barren solution according to claim 3, wherein the organic amine is selected from the group consisting of tertiary alkyl amines, quaternary ammonium salts, and secondary alkyl amines, and the higher alcohol is selected from the group consisting of octa-alcohols, isooctanols, and decanols.
5. The method for treating the reusable cyanide gold-leaching barren solution according to claim 1, wherein the pH of the cyanide gold-leaching barren solution is 8-14 in the extraction process.
6. The process for recycling cyanide gold-leaching barren solution according to claim 1, characterized in that the stripping agent alkali can be sodium hydroxide solution, potassium hydroxide solution, lithium hydroxide solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99112123A CN1075839C (en) | 1999-03-18 | 1999-03-18 | Treatment method of reusable cyanide gold-leaching lean solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99112123A CN1075839C (en) | 1999-03-18 | 1999-03-18 | Treatment method of reusable cyanide gold-leaching lean solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1263166A true CN1263166A (en) | 2000-08-16 |
| CN1075839C CN1075839C (en) | 2001-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99112123A Expired - Fee Related CN1075839C (en) | 1999-03-18 | 1999-03-18 | Treatment method of reusable cyanide gold-leaching lean solution |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350677A (en) * | 2015-07-16 | 2017-01-25 | 东北大学 | Method for extracting copper-containing cyanided waste liquid by solvent to recycle copper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1186867A (en) * | 1996-12-29 | 1998-07-08 | 长沙铁道学院 | Method of extracting gold by mixed oxidant in cyaniding leaching |
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1999
- 1999-03-18 CN CN99112123A patent/CN1075839C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350677A (en) * | 2015-07-16 | 2017-01-25 | 东北大学 | Method for extracting copper-containing cyanided waste liquid by solvent to recycle copper |
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| CN1075839C (en) | 2001-12-05 |
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