CN105586494A - Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution - Google Patents
Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution Download PDFInfo
- Publication number
- CN105586494A CN105586494A CN201610161528.6A CN201610161528A CN105586494A CN 105586494 A CN105586494 A CN 105586494A CN 201610161528 A CN201610161528 A CN 201610161528A CN 105586494 A CN105586494 A CN 105586494A
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- Prior art keywords
- gold
- solution
- recycling
- iodide
- iodate
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
-
- 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 recycling gold from an iodide gold leaching pregnant solution on the basis of recycling of a waste solution, relates to a method for recycling gold from the iodide gold leaching pregnant solution, and aims to solve problems that in an existing method for recycling precious metals by using an iodine-iodide solution, a gold leaching waste solution cannot be reused so that the cost of recycling of gold from the iodide gold leaching pregnant solution is relatively high. The method comprises the following steps: preparing iodine and iodide into a gold leaching solution at first according to the molar ratio of 1:4-10 at first and carrying out gold leaching; then adding activated carbon, repeatedly carrying out slow stirring and standing adsorption operation, then extracting the activated carbon, desorbing the activated carbon and recycling gold; and meanwhile, standing to precipitate the solution after the activated carbon is extracted from the solution, extracting precipitation, slowly adding hydrogen peroxide in the solution and slowly stirring until the solution becomes fuscous so as to obtain a recycled iodide-process gold leaching solution. The method is suitable for recycling the gold from the iodide gold leaching pregnant solution.
Description
Technical field
The present invention relates to the recovery method of gold in iodate gold immersing liquid.
Background technology
Traditional gold mine, waste and old electric device recovery gold or other noble metal are substantially gone up and are all utilized cyanide to carry out,There is high pollution, highly toxic shortcoming in the method for utilizing cyanide to reclaim noble metal. In recent years, utilized iodo-iodide to leachThe method that liquid reclaims noble metal has been widely used in gold mine, electronics and jewelry commercial recovery trace gold and other your goldGenus field.
Utilize iodo-iodide solution as the solvent of noble metal be used for reclaiming in ore (or waste and old electric device) gold andThe method of its noble metal, due to the higher method high expensive that causes utilizing iodo-iodide solution recovery noble metal of price of iodine,Although existing method can be controlled the ratio of iodine and iodide in gold leachate in the early stage, thereby controls cost, existing iodineSoaking golden waste liquid and can not again utilizing of change method, has caused a large amount of iodine loss and iodine to waste, and has further increased and has utilized iodine-iodide solution reclaims the cost of noble metal method. And iodide process is soaked, and golden waste liquid is not treated also can be caused necessarily environmentPollution.
Summary of the invention
The present invention for solve in the existing method of utilizing iodo-iodide solution to reclaim noble metal, exist soak golden waste liquid can notAgain utilize the problem that reclaims golden high expensive in the iodate gold immersing liquid causing.
1, a recovery method of considering gold in the iodate gold immersing liquid of waste liquid Recycling, comprises the steps:
Step 1, by iodine and iodide according to 1:(4-10) mol ratio configuration gold leachate, utilize gold leachate to soak gold;
Step 2, in the expensive liquid of leaching soaking after gold, add active carbon, repeatedly carry out slowly stirring and standing adsorption operates, whenCharcoal absorption is leached after the golden iodo-complexes in your liquid, isolates active carbon, obtains isolating the solution after active carbon;
Step 3, staticly settle the solution of isolating after active carbon more than 20 minutes, then isolate the sediment in solution,In solution, slowly add hydrogen peroxide and slowly stir, becoming crineous to solution and stop adding hydrogen peroxide, obtaining RecyclingIodide process gold leachate;
Step 4, to isolated active carbon carry out desorb processing and reclaim gold.
2, a recovery method of considering gold in the iodate gold immersing liquid of waste liquid Recycling, comprises the steps:
Step 1, by iodine and iodide according to 1:(4-10) mol ratio configuration gold leachate, utilize gold leachate to soak gold;
Step 2, in the expensive liquid of leaching soaking after gold, add reducing agent or sodium hydroxide solution or alkaline hydroxylamine solution, repeatedly enterRow slowly stirs and standing operation, reacts fully and carries out;
Step 3, staticly settle solution more than 20 minutes, then isolate the sediment in solution, in solution, slowly addEnter hydrogen peroxide and slowly stir, becoming crineous to solution and stop adding hydrogen peroxide, obtaining the iodide process gold leachate of Recycling;
Step 4, gold is processed and reclaimed to isolated sediment.
Reducing agent described in step 2 is SO2、NaHSO3、Na2S2O5One or more.
Alkaline hydroxylamine solution described in step 2 is NH2The mixed solution of OH and NaOH.
The present invention has following effect:
Utilize the present invention to carry out the recovery of gold in iodate gold immersing liquid, can obtain the iodide process gold leachate of Recycling, avoidCause loss and the waste of the iodine in waste liquid, utilize iodo-iodide solution to reclaim the total of iodine in noble metal method thereby reducedConsumption, and then reduced the cost that utilizes iodo-iodide solution to reclaim noble metal method; Compare traditional way, the present inventionCan save more than 50% iodine consumption, reduce to a great extent the one-tenth that utilizes iodo-iodide solution to reclaim noble metal methodThis. And utilize the present invention to avoid iodide process to soak the not treated pollution on the environment of golden waste liquid, utilize the present invention simultaneouslyCan simplify the process of the iodo-iodide solution of configuration, save in iodate gold immersing liquid and reclaimed golden total time.
Brief description of the drawings
Fig. 1 is the processing operating process schematic diagram while adding active carbon;
Fig. 2 is the processing operating process schematic diagram while adding reducing agent or NaOH or alkaline hydroxylamine solution.
Detailed description of the invention
Detailed description of the invention one:
A recovery method of considering gold in the iodate gold immersing liquid of waste liquid Recycling, comprises the steps:
Step 1, by iodine and iodide according to 1:(4-10) mol ratio configuration gold leachate, utilize gold leachate to soak gold;
Step 2, in the expensive liquid of leaching soaking after gold, add active carbon, repeatedly carry out slowly stirring and standing adsorption operates, whenCharcoal absorption is leached after the golden iodo-complexes in your liquid, isolates active carbon, obtains isolating the solution after active carbon;
Step 3, staticly settle the solution of isolating after active carbon more than 20 minutes, then isolate the sediment in solution,In solution, slowly add hydrogen peroxide and slowly stir, becoming crineous to solution and stop adding hydrogen peroxide, obtaining RecyclingIodide process gold leachate;
The principles of chemistry that react are as follows:
2I–+2H++H2O2＝I2↓+2H2O
I2+I–＝I3 -(crineous)
Step 4, to isolated active carbon carry out desorb processing and reclaim gold.
Utilize this method to enter in iodate gold immersing liquid the recovery of gold, select with charcoal absorption soak golden iodo-complexes in gold andIts compound, relatively existing method, the present invention can improve the golden rate of recovery, and removes (other changes of other compoundsThe kind of compound and gold mine about) effective, this method can be removed the compound that variety classes gold mine is corresponding, thus thisThe applicability of method is better. Meanwhile, in the present invention, repeatedly carry out slowly stirring and the operation of standing adsorption can ensure active carbonEffectively remove the effect of golden iodo-complexes and other compound.
This method not only can re-use soaking golden waste liquid, the iodine waste of avoiding conventional method to cause, and save largeThe time of the configuration gold leachate of amount, utilize the gold leachate that the present invention recovers again need not carry out after-treatment or adjustment simultaneously,Can directly reuse.
And with respect to existing certain methods, this method is without adding the medicaments such as the concentrated sulfuric acid, also without the processing such as heating,Not only simplify technique, and can further save production cost.
Detailed description of the invention two:
That described in present embodiment step 2, repeatedly carries out slowly stirring and standing adsorption operation is more than or equal to 1 hour total time.
Other steps and parameter are identical with detailed description of the invention one.
Detailed description of the invention three:
Lock out operation in present embodiment described in step 2 is isolated by filtration.
Other steps and parameter are identical with detailed description of the invention one or two.
Detailed description of the invention four:
Lock out operation described in present embodiment step 3 is isolated by filtration.
Other steps and parameter are identical with one of detailed description of the invention one to three.
Detailed description of the invention five:
Step 1, by iodine and iodide according to 1:(4-10) mol ratio configuration gold leachate, utilize gold leachate to soak gold;
Step 2, in the expensive liquid of leaching soaking after gold, add reducing agent or sodium hydroxide solution or alkaline hydroxylamine solution, repeatedly enterRow slowly stirs and standing operation, reacts fully and carries out;
Step 3, staticly settle solution more than 20 minutes, then isolate the sediment in solution, in solution, slowly addEnter hydrogen peroxide and slowly stir, becoming crineous to solution and stop adding hydrogen peroxide, obtaining the iodide process gold leachate of Recycling;
Step 4, gold is processed and reclaimed to isolated sediment.
The principles of chemistry that react are as follows:
While utilizing reducing process to reclaim gold, soak in golden waste liquid in acidity, gold is with HAuI4Form exist, utilize acidic reductionAgent is as SO2、NaHSO3、Na2S2O5Deng making gold precipitate:
6NaHSO3+2HAuI4→2Au↓+6NaI+2HI+3SO2↑+3H2SO4
Na2S2O5Put into water, aquation generates sodium hydrogensulfite, sodium hydrogensulfite and HAuI4Reaction, forms golden precipitation.
The SO discharging in above-mentioned reaction2With reducing agent mode and HAuI4React further precipitation of gold:
2HAuI4+6H2O+3SO2→2Au↓+3H2SO4+8HI
In gold immersing liquid, add NaOH, make solution become strong alkali solution, gold also can be precipitated out:
4HAuI4+16NaOH→4Au↓+16NaI+10H2O+3O2↑
Add equally alkaline hydroxylamine solution, gold also can be precipitated out:
2NaAuI4+6NH2OH+6NaOH→2Au↓+3N2↑+8NaI+12H2O
Precipitation of gold is in this way proper in high concentration gold immersing liquid, because filtering-depositing when gold is moltenThe filtration yield of liquid is less, and medicament loss is relatively little.
Utilize this method to enter in iodate gold immersing liquid the recovery of gold, due to the chemical reaction characteristic in this method and repeatedly carry outSlowly the operation of stirring and standing adsorption can ensure that sufficient reacting carries out, and makes the rate of recovery of gold in this method higher, instituteApplicability with this method is better. Meanwhile, this method not only can re-use soaking golden waste liquid, avoids conventional method to makeThe iodine becoming is wasted, and saves the time of a large amount of configuration gold leachates.
Detailed description of the invention six:
Reducing agent in present embodiment described in step 2 is SO2、NaHSO3、Na2S2O5One or more.
Other steps and parameter are identical with detailed description of the invention five.
Detailed description of the invention seven:
Alkaline hydroxylamine solution in present embodiment described in step 2 is NH2The mixed solution of OH and NaOH.
Other steps and parameter are identical with detailed description of the invention five or six.
Detailed description of the invention eight:
In present embodiment, described in step 2, repeatedly slowly stir and standing operation be more than or equal to total time 1 littleTime.
Other steps and parameter are identical with one of detailed description of the invention five to seven.
Detailed description of the invention nine:
In present embodiment, described in step 3, lock out operation is isolated by filtration.
Other steps and parameter are identical with one of detailed description of the invention five to eight.
The present invention also can have other various embodiments, in the situation that not deviating from spirit of the present invention and essence thereof, and art technologyPersonnel are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to thisThe protection domain of bright appended claim.
Claims (9)
1. a recovery method of considering gold in the iodate gold immersing liquid of waste liquid Recycling, is characterized in that comprising the steps:
Step 1, by iodine and iodide according to 1:(4-10) mol ratio configuration gold leachate, utilize gold leachate to soak gold;
Step 2, in the expensive liquid of leaching soaking after gold, add active carbon, repeatedly carry out slowly stirring and standing adsorption operates, work as workProperty charcoal absorption leach after the golden iodo-complexes in your liquid, isolate active carbon, obtain isolating the solution after active carbon;
Step 3, staticly settle the solution of isolating after active carbon more than 20 minutes, then isolate the sediment in solution,In solution, slowly add hydrogen peroxide and slowly stir, becoming crineous to solution and stop adding hydrogen peroxide, obtaining RecyclingIodide process gold leachate;
Step 4, to isolated active carbon carry out desorb processing and reclaim gold.
2. the recovery method of gold in a kind of iodate gold immersing liquid of considering waste liquid Recycling according to claim 1, itsBe characterised in that and repeatedly carry out described in step 2 slowly stirring and standing adsorption operates is more than or equal to 1 hour total time.
3. the recovery method of gold in a kind of iodate gold immersing liquid of considering waste liquid Recycling according to claim 2, itsBe characterised in that the lock out operation described in step 2 is isolated by filtration.
4. the recovery method of gold in a kind of iodate gold immersing liquid of considering waste liquid Recycling according to claim 3, itsBe characterised in that the lock out operation described in step 3 is isolated by filtration.
5. a recovery method of considering gold in the iodate gold immersing liquid of waste liquid Recycling, is characterized in that comprising the steps:
Step 1, by iodine and iodide according to 1:(4-10) mol ratio configuration gold leachate, utilize gold leachate to soak gold;
Step 2, in the expensive liquid of leaching soaking after gold, add reducing agent or sodium hydroxide solution or alkaline hydroxylamine solution, repeatedly carry outSlowly stir and standing operation, react fully and carry out;
Step 3, staticly settle solution more than 20 minutes, then isolate the sediment in solution, in solution, slowly addHydrogen peroxide also slowly stirs, and becomes crineous stop adding hydrogen peroxide to solution, obtains the iodide process gold leachate of Recycling;
Step 4, gold is processed and reclaimed to isolated sediment.
6. the recovery method of gold in a kind of iodate gold immersing liquid of considering waste liquid Recycling according to claim 5, itsBe characterised in that the reducing agent described in step 2 is SO2、NaHSO3、Na2S2O5One or more.
7. the recovery method of gold in a kind of iodate gold immersing liquid of considering waste liquid Recycling according to claim 5, itsBe characterised in that the alkaline hydroxylamine solution described in step 2 is NH2The mixed solution of OH and NaOH.
8. according to the recovery side of gold in a kind of iodate gold immersing liquid of considering waste liquid Recycling described in claim 6 or 7Method, it is characterized in that repeatedly slowly stirring described in step 2 and standing operation be more than or equal to 1 hour total time.
9. the recovery method of gold in a kind of iodate gold immersing liquid of considering waste liquid Recycling according to claim 8, itsBe characterised in that described in step 3 that lock out operation is isolated by filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610161528.6A CN105586494A (en) | 2016-03-21 | 2016-03-21 | Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610161528.6A CN105586494A (en) | 2016-03-21 | 2016-03-21 | Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965030A (en) * | 2016-06-20 | 2016-09-28 | 昆山鸿福泰环保科技有限公司 | Technique for recovering gold from gold iodide liquid waste |
| CN107354308A (en) * | 2017-07-28 | 2017-11-17 | 许良秋 | A kind of method for gold of purifying metals |
| CN108642289A (en) * | 2018-05-28 | 2018-10-12 | 南开大学 | A method of recycling gold from waste mobile phone printed circuit board |
| CN110656251A (en) * | 2019-09-24 | 2020-01-07 | 广东工业大学 | Rapid and environment-friendly circuit board gold stripping liquid, preparation method and application thereof, and gold stripping method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965030A (en) * | 2016-06-20 | 2016-09-28 | 昆山鸿福泰环保科技有限公司 | Technique for recovering gold from gold iodide liquid waste |
| CN107354308A (en) * | 2017-07-28 | 2017-11-17 | 许良秋 | A kind of method for gold of purifying metals |
| CN107354308B (en) * | 2017-07-28 | 2019-09-24 | 许良秋 | A method of gold of purifying metals |
| CN108642289A (en) * | 2018-05-28 | 2018-10-12 | 南开大学 | A method of recycling gold from waste mobile phone printed circuit board |
| CN110656251A (en) * | 2019-09-24 | 2020-01-07 | 广东工业大学 | Rapid and environment-friendly circuit board gold stripping liquid, preparation method and application thereof, and gold stripping method |
| CN110656251B (en) * | 2019-09-24 | 2021-11-26 | 广东工业大学 | Rapid and environment-friendly circuit board gold stripping liquid, preparation method and application thereof, and gold stripping method |
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