CN102586617B - Method for recovering gold from iodine-potassium iodide leachate - Google Patents
Method for recovering gold from iodine-potassium iodide leachate Download PDFInfo
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- CN102586617B CN102586617B CN201210032827.1A CN201210032827A CN102586617B CN 102586617 B CN102586617 B CN 102586617B CN 201210032827 A CN201210032827 A CN 201210032827A CN 102586617 B CN102586617 B CN 102586617B
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- gold
- iodine
- leachate
- filter residue
- liquid
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000010931 gold Substances 0.000 title claims abstract description 67
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 36
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 title claims abstract description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 16
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011630 iodine Substances 0.000 claims abstract description 14
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 14
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 12
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract 5
- 238000011084 recovery Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 238000010790 dilution Methods 0.000 claims description 5
- 239000012895 dilution Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 claims description 4
- 229940006461 iodide ion Drugs 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 2
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 abstract description 9
- 150000002500 ions Chemical class 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- GCZKMPJFYKFENV-UHFFFAOYSA-K triiodogold Chemical compound I[Au](I)I GCZKMPJFYKFENV-UHFFFAOYSA-K 0.000 abstract description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- -1 iodine ions Chemical class 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 239000000284 extract Substances 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229960004839 potassium iodide Drugs 0.000 description 2
- 235000007715 potassium iodide Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- KCSWTHLEEQOKDA-UHFFFAOYSA-K gold(3+) triiodate Chemical compound [Au+3].[O-]I(=O)=O.[O-]I(=O)=O.[O-]I(=O)=O KCSWTHLEEQOKDA-UHFFFAOYSA-K 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-M iodate Chemical compound [O-]I(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-M 0.000 description 1
- 230000026045 iodination Effects 0.000 description 1
- 238000006192 iodination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000001637 plasma atomic emission spectroscopy Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- 235000011150 stannous chloride Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 description 1
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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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for recovering gold from iodine-potassium iodide leachate. Concentrated sulfuric acid (H2SO4) and hydrogen peroxide are added into the leachate containing iodine, potassium iodide and gold iodide, the two reagents are reacted with iodine ions in the leachate to generate iodine, the iodine is volatilized out of a container at high temperature, and after the iodine is volatilized, the leachate is transparent; and the leachate is continuously heated, the two reagents also can convert gold in an ion state into gold in an atomic state to fulfill the aim of reducing the gold, and excessive reagents are decomposed at high temperature. The invention aims to control the types and weight of the added chemicals, simplify the operating process and improve the purity of the recovered gold; and by the method, the utilization rate of the gold can be greatly improved.
Description
Technical field:
The invention belongs to the recovery field of gold in gold-containing scrap, invention relates to a kind of recovery method of gold from iodine-potassium iodide leachate.
Background technology:
At present, the recovery method of gold from iodine-potassium iodide leachate has zinc replacement, sodium sulphite anhydrous 99.3 reduction method, gac/bubble to mould absorption method and strike etc.Owing to containing a large amount of iodine (7%) and potassiumiodide (15%) in immersion liquid, conventionally to its treatment process, be first to add acid (hydrochloric acid, nitric acid, hydrogen peroxide) or tin protochloride that the iodine in immersion liquid is removed, and then add reductive agent or with high temperature sintering, gold reclaimed out.
Li Guichun
[1]deng to the recovery method of gold in gold leachate, have conducted intensive studies, result of study shows: from iodate gold leachate, reclaim gold, zinc substitution method is feasible in theory, but the consumption of zinc is greater than Cyanide solution consumption zinc, from economic aspect, consider, be unsuitable for iodination and reclaim gold; By the method for activated carbon adsorption, the absorption rate of recovery of gold can reach more than 93%, but in gold leachate, negatively charged ion has certain influence to the adsorption activity of activated carbon, and the method is applicable to the gold leachate of low iodide ion concentration; Strike reclaims gold, in gold leachate, the starting point concentration of gold should be greater than 40mg/L, and the electrolytic deposition rate of recovery of gold can reach more than 95%, but gold concentration is when low (<40mg/L), the rate of recovery of one-step electrolysis gold is lower, and this is difficult to reach in actual applications; Use SO
2, NaHSO
3, Na
2sO
5deng acidic reduction agent, also the gold in gold leachate can be reclaimed.
Zhou Yongyi
[2]in " by iodo-iodide solution Leaching of Gold method ", propose, add reductive agent, make gold form complex compound, finally precipitate the gold in gold leachate.
More than extracts golden method and all can extract preferably gold, and the rate of recovery is higher, but due to the chemical reagent adding or other raw material more, have a strong impact on and extract golden purity, operating process is complicated in addition, is difficult to carry out large-scale production.
More than reclaims golden method and all can extract preferably gold, and the rate of recovery is higher, but due to the chemical reagent adding or other raw material more, have a strong impact on and extract golden purity, operating process is complicated in addition, is difficult to carry out large-scale production.
Summary of the invention:
The object of the invention is to control kind and the weight of adding chemical, simplify the operation course, improve and reclaim golden purity; In the past, because the consumption of gold leachate is few, useless gold leachate is arbitrarily toppled over to discharge, along with the high speed development of unicircuit, the consumption of gold leachate constantly increases, and of the present invention coming into operation can be improved the utilization ratio of gold greatly.
In gold leachate, contain iodine, potassiumiodide and gold triiodide, in gold leachate, add the vitriol oil (H
2sO
4), two kinds of reagent of hydrogen peroxide, above-mentioned two kinds of reagent react with iodide ion in gold leachate and generate iodine, iodine volatilizes container under the effect of high temperature, after the iodine in immersion liquid has volatilized, immersion liquid is transparent; Continue heating, above-mentioned two kinds of reagent can be converted into the gold of ionic state the gold of atomic state again, realize the golden object of reduction, and unnecessary reagent decomposes under the effect of high temperature.
The invention has the beneficial effects as follows:
Because present method only adds the vitriol oil and the hydrogen peroxide agent that purity is higher, in removal process, dilution, bath water are pure water, method is not introduced other too much impurity, so it is high that present method reclaims golden purity, to adopting present method to reclaim golden purity, carry out plasma emission spectrometry (ICP-OES) mensuration, record result as shown in table 1.Measurement result reaches 99.99%, reclaims gold and can be recycled and reused among unicircuit production technique; Present method adopts chemical reagent reduction gold, after gold reduction, and the complete water white transparency of immersion liquid, filtrate is again without molten golden ability, so the rate of recovery of present method almost can reach 100%; In addition, present method operating process is simple, and experimental installation is few, can be used in large-scale recovery process.
Table 1 reclaims golden ICP-OES measurement result (wt%)
| Element term | Ag | Cu | Fe | Pb | Bi | Sb | Summation |
| Measured value | 0.0031 | 0.000013 | 0.00054 | 0.00033 | Do not detect | / | 0.0040 |
| Desired value | 0.005 | 0.002 | 0.002 | 0.001 | 0.002 | 0.001 | 0.01 |
Embodiment:
Get a certain amount of gold leachate, put into uncovered container, add the vitriol oil (H with gold leachate equivalent
2sO
4) reagent and half hydrogen peroxide agent of measuring, heating, along with the rising of gold leachate temperature, iodide ion is oxidized to iodine, the iodine of oxidation and the iodine in liquid are from container with the volatilization of purple smoke form, and purple smoke disappears, and liquid shows to drive iodine end of processing while being water white transparency; Continue to be heated to 350 ℃, decompose the unnecessary vitriol oil (H
2sO
4) and hydrogen peroxide, vessel port end stops heating while there is white smoke, cooling vessel is to room temperature, along container wall, slowly add a small amount of pure water dilution gold leachate, with ashless filter paper, filter, extremely neutral with hot pure water washing filter residue, dry filter residue, heating makes filter paper charing, and in 800 ℃ of calcination filter residues 1 hour, filter residue was proof gold.
Because present method also can be used as gold content measuring method in gold leachate, adopt present method to carry out gold content analysis to 13 bottles of gold leachates, analytical results is as shown in the table.
The measurement result of gold content in table 213 bottle gold leachate
| Numbering | Gold Content (grams per liter) | Numbering | Gold Content (grams per liter) |
| 1# | 2.78 | 8# | 6.99 |
| 2# | 2.46 | 9# | 6.92 |
| 3# | 7.44 | 10# | 7.37 |
| 4# | 5.60 | 11# | 4.16 |
| 5# | 3.53 | 12# | 0.93 |
| 6# | 4.45 | 13# | 6.01 |
| 7# | 4.37 | / | / |
Reference:
［ 1 ］ Li Guichun, Ji Shoufeng, Wang Huiping. when soaking gold, iodate proposes gold and iodine renovation process research [J] from leach liquor. mining metallurgical engineering, 2006,26(3): 42-47.
［ 2 ］ Zhou Yongyi. by the method ［ J ］ of iodo-iodide solution Leaching of Gold. coloured mining and metallurgy, the 03rd phase in 1994.
Claims (2)
1. the recovery method of gold from iodine-potassium iodide leachate, is characterized in that, comprises the steps:
1) get a certain amount of described gold leachate and put into container, add the vitriol oil (H with gold leachate equivalent
2sO
4) reagent and half hydrogen peroxide agent of measuring;
2) heat described gold leachate, make iodide ion be oxidized to iodine, the iodine of oxidation and the iodine in liquid are from container with the volatilization of purple smoke form, and purple smoke disappears, and when liquid is water white transparency, drives iodine end of processing;
3) continue to be heated to 350 ℃, decompose the unnecessary vitriol oil (H
2sO
4) and hydrogen peroxide, vessel port end stops heating while there is white smoke, and cooling vessel is to room temperature;
4) add pure water dilution gold leachate, and to the liquid filtering after dilution; With the filter residue after hot pure water washing and filtering, to neutral, dry filter residue calcination filter residue 1 hour, temperature during calcination filter residue is 800 ℃, and filter residue is proof gold.
2. method according to claim 1, is characterized in that: described step 4), adopt ashless filter paper to filter the liquid after dilution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210032827.1A CN102586617B (en) | 2012-02-14 | 2012-02-14 | Method for recovering gold from iodine-potassium iodide leachate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210032827.1A CN102586617B (en) | 2012-02-14 | 2012-02-14 | Method for recovering gold from iodine-potassium iodide leachate |
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| Publication Number | Publication Date |
|---|---|
| CN102586617A CN102586617A (en) | 2012-07-18 |
| CN102586617B true CN102586617B (en) | 2014-02-19 |
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| CN201210032827.1A Active CN102586617B (en) | 2012-02-14 | 2012-02-14 | Method for recovering gold from iodine-potassium iodide leachate |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702158B (en) * | 2015-07-13 | 2019-01-01 | 灵宝欣宏金属科技有限公司 | Method for regenerating waste generated by electrolytic production of potassium gold citrate and/or potassium gold cyanide |
| CN105731382A (en) * | 2016-01-25 | 2016-07-06 | 珠海格力电器股份有限公司 | Method for preparing iodide from regenerated iodine in iodinated gold leaching agent and iodinated gold leaching agent |
| CN105586494A (en) * | 2016-03-21 | 2016-05-18 | 黑龙江科技大学 | Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution |
| CN105624422A (en) * | 2016-03-22 | 2016-06-01 | 黑龙江科技大学 | Recovery method for gold in iodized gold leaching noble solution considering recycling of waste liquor |
| CN105838900B (en) * | 2016-04-11 | 2017-08-25 | 许良秋 | One kind uses I2The method that gold refining is carried out with NaI |
| CN105648232B (en) * | 2016-04-11 | 2017-09-26 | 许良秋 | One kind uses I2The method that gold refining is carried out with KI |
| 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 |
| CN110106505A (en) * | 2019-05-27 | 2019-08-09 | 江门职业技术学院 | It is a kind of remove gold coating composition and its application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329960A (en) * | 2011-08-18 | 2012-01-25 | 华星集团环保产业发展有限公司 | Method for extracting gold from waste and old circuit board |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007016259A (en) * | 2005-07-05 | 2007-01-25 | Kyoei Metal Kk | System for collecting gold while recycling iodine ion in gold-removing liquid |
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2012
- 2012-02-14 CN CN201210032827.1A patent/CN102586617B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329960A (en) * | 2011-08-18 | 2012-01-25 | 华星集团环保产业发展有限公司 | Method for extracting gold from waste and old circuit board |
Non-Patent Citations (3)
| Title |
|---|
| 刘朝辉等.过氧化氢还原法制取四九金的研究.《有色金属（冶炼部分）》.2000,(第3期),33页的2.1. * |
| 李桂春等.碘化浸金时从浸出液中提金及碘再生方法研究.《矿冶工程》.2006,第26卷(第3期),42-44、47页. |
| 碘化浸金时从浸出液中提金及碘再生方法研究;李桂春等;《矿冶工程》;20060630;第26卷(第3期);42-44、47页 * |
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| CN102586617A (en) | 2012-07-18 |
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