CN110983065A - Method for reducing gold in iodine-containing waste liquid - Google Patents
Method for reducing gold in iodine-containing waste liquid Download PDFInfo
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- CN110983065A CN110983065A CN201911335576.2A CN201911335576A CN110983065A CN 110983065 A CN110983065 A CN 110983065A CN 201911335576 A CN201911335576 A CN 201911335576A CN 110983065 A CN110983065 A CN 110983065A
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- waste liquid
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- iodine
- containing waste
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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
- C22B11/042—Recovery of noble metals from waste materials
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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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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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of metal recovery and regeneration, and relates to a method for reducing gold in iodine-containing waste liquid. The invention can reduce high-purity gold particles at low cost so as to recover gold and accurately measure the gold content in the waste liquid.
Description
Technical Field
The invention relates to the technical field of metal recovery and regeneration, in particular to a method for reducing gold in iodine-containing waste liquid.
Background
Gold-containing solutions are of a wide variety and are widely used in various industrial sectors, and all sectors that use and manufacture these gold-containing materials and components have these gold-containing wastes, wherein KI waste liquor is one of the gold-containing waste liquors. When the content of gold in the gold-containing solution is reduced to a certain amount, the gold-containing solution is discarded to become gold-containing waste liquid. The problem of recovering gold from waste liquid not only has high economic value, but also eliminates or reduces the pollution of waste liquid to the environment. Therefore, how to rapidly and quantitatively measure the gold content provides necessary data parameters for the recovery of the gold in the waste liquid. At present, methods for recovering gold from KI waste liquid comprise a zinc powder replacement method, an activated carbon/foam plastic adsorption method, an electrolytic deposition method, an anhydrous sodium sulfite reduction method, a sulfuric acid reduction method and the like.
Because the waste liquid contains a large amount of iodine and potassium iodide, the treatment method of the waste liquid is to firstly add acid or stannous chloride to remove the iodine in the waste liquid, and then add a reducing agent or burn the reducing agent at high temperature to recover gold. Through intensive research on the method, research results show that the method for recovering gold from KI waste liquid is theoretically feasible by a zinc powder replacement method, but the consumption of zinc is greater than that of a cyanidation system, so that the method is not suitable for recovering gold from KI in the aspect of economy.
The gold adsorption recovery rate can reach more than 93% by using the method of activated carbon adsorption, but anions in the waste liquid have certain influence on the adsorption activity of the activated carbon, and the method is suitable for the gold waste liquid with low iodine ion concentration.
The gold is recovered by the electrolytic deposition method, the initial concentration of gold in the waste liquid is more than 40mg/L, the recovery rate of gold electrolytic deposition can reach more than 95%, but when the concentration of gold is low (< 40mg/L), the recovery rate of gold electrolytic in one step is low, which is difficult to achieve in practical application.
The gold in the waste liquid can be recovered by using acid reducing agents such as anhydrous sodium sulfite and the like, but the purity of the extracted gold is seriously influenced due to more added chemical reagents or other raw materials, and the operation process is complex and is difficult to carry out large-scale production.
The sulfuric acid reduction method is a method of adding sulfuric acid into the gold-containing waste liquid and then heating the gold-containing waste liquid at a high temperature in an electric furnace to reduce gold in the KI waste liquid. The method takes longer, less 4h and more longer. If the sample contains more impurities, the sample cannot be boiled into a piece of clean sponge gold, and a layer of gold-containing soil-like bulk impurities exist at the bottom of the bottle. During the sulfuric acid washing process, the impurities are dissolved in water or flow out with the water, so that the final analysis result is low.
Therefore, there is a need to provide a new recycling technique to save costs.
Disclosure of Invention
The invention mainly aims to provide a method for reducing gold in iodine-containing waste liquid, which can be used for efficiently adsorbing precious metals in the waste liquid on the premise of saving medicament cost.
The invention realizes the purpose through the following technical scheme: a process for preparing the adsorbing material used to recover noble metal includes such steps as adding sodium hydroxide solution to waste liquid, regulating pH value to basicity, adding hydrazine to reduce gold to become black deposit, laying aside, filtering, baking and blowing ash to obtain gold particles.
Specifically, the sodium hydroxide solution is added to the waste liquid, the color disappears, and the solution is transparent as an end point.
Specifically, hydrazine is added to the waste liquid without bubbling.
Specifically, the soot blowing method comprises the steps of wrapping the dried filtrate with lead and platinum, and then putting the wrapped filtrate into a high-temperature furnace, wherein the set temperature of the high-temperature furnace is 1050 ℃, and the high-temperature furnace works for 1 hour.
By adopting the technical scheme, the technical scheme of the invention has the beneficial effects that:
the invention can reduce high-purity gold particles at low cost so as to recover gold and accurately measure the gold content in the waste liquid.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example (b):
① samples (10g-20g) to a 250ml beaker, and the sodium hydroxide solution is added to adjust the pH to be alkaline, generally the color of iodine disappears, and the solution is transparent, therefore, the main purpose of the step is to make sodium hydroxide react with iodine simple substance in the waste liquid to convert into colorless iodide ions, so when the color of the waste liquid disappears, the solution is proved to have no iodine simple substance residue, the solution can also ensure the alkaline condition suitable for reacting with hydrazine.
② adding hydrazine to reduce the gold in KI, generating black precipitate, continuously shaking the beaker in the reaction process, properly heating, bubbling in the reduction process, reducing the gold until no bubbling is generated, namely, completely reacting, standing the solution for 10min, and filtering.
③ drying the filtrate, wrapping with lead foil, and blowing soot in a high temperature furnace at 1050 deg.C for 1h to obtain gold particles.
The invention can reduce high-purity gold particles at low cost so as to recover gold and accurately measure the gold content in the waste liquid.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (5)
1. A method for reducing gold in iodine-containing waste liquid is characterized in that: the steps include adding sodium hydroxide solution into the waste liquid, mixing, regulating pH to alkalinity, adding hydrazine to reduce gold to form black precipitate, standing, filtering, stoving the filtrate and blowing ash to form gold grains.
2. The method of reducing gold in iodine-containing waste liquid according to claim 1, wherein: the color of the sodium hydroxide solution added into the waste liquid disappears, and the solution is transparent as an end point.
3. The method of reducing gold in iodine-containing waste liquid according to claim 1, wherein: the hydrazine is added into the waste liquid and does not bubble any more.
4. The method of reducing gold in iodine-containing waste liquid according to claim 1, wherein: the solution was shaken and heated during the hydrazine reduction.
5. The method of reducing gold in iodine-containing waste liquid according to claim 1, wherein: the soot blowing method comprises the steps of wrapping the dried filtrate with lead and platinum, and then putting the wrapped filtrate into a high-temperature furnace, wherein the set temperature of the high-temperature furnace is 1050 ℃, and the high-temperature furnace works for 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335576.2A CN110983065A (en) | 2019-12-23 | 2019-12-23 | Method for reducing gold in iodine-containing waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335576.2A CN110983065A (en) | 2019-12-23 | 2019-12-23 | Method for reducing gold in iodine-containing waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110983065A true CN110983065A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911335576.2A Pending CN110983065A (en) | 2019-12-23 | 2019-12-23 | Method for reducing gold in iodine-containing waste liquid |
Country Status (1)
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| CN (1) | CN110983065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111850565A (en) * | 2020-07-16 | 2020-10-30 | 昆山全亚冠环保科技有限公司 | Method for recovering gold and iodine from etching waste liquid |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159134A (en) * | 1984-01-30 | 1985-08-20 | Nippon Pureeteingu Kk | Method for recovering gold from waste liquid |
| JPH01180923A (en) * | 1988-01-12 | 1989-07-18 | Tanaka Kikinzoku Kogyo Kk | Recovering method for noble metal |
| CN1095422A (en) * | 1993-05-20 | 1994-11-23 | 薛光 | The full wet method gold and silver of gold mud separating technology |
| JP2005307271A (en) * | 2004-04-21 | 2005-11-04 | Dowa Mining Co Ltd | Method for producing high purity gold |
| CN103074501A (en) * | 2013-02-22 | 2013-05-01 | 昆山鸿福泰环保科技有限公司 | Gold net recovery process |
| CN105838900A (en) * | 2016-04-11 | 2016-08-10 | 许良秋 | Method for refining gold through I2 and NaI |
| 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 |
-
2019
- 2019-12-23 CN CN201911335576.2A patent/CN110983065A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159134A (en) * | 1984-01-30 | 1985-08-20 | Nippon Pureeteingu Kk | Method for recovering gold from waste liquid |
| JPH01180923A (en) * | 1988-01-12 | 1989-07-18 | Tanaka Kikinzoku Kogyo Kk | Recovering method for noble metal |
| CN1095422A (en) * | 1993-05-20 | 1994-11-23 | 薛光 | The full wet method gold and silver of gold mud separating technology |
| JP2005307271A (en) * | 2004-04-21 | 2005-11-04 | Dowa Mining Co Ltd | Method for producing high purity gold |
| CN103074501A (en) * | 2013-02-22 | 2013-05-01 | 昆山鸿福泰环保科技有限公司 | Gold net recovery process |
| CN105838900A (en) * | 2016-04-11 | 2016-08-10 | 许良秋 | Method for refining gold through I2 and NaI |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 卢嘉锡: "《中国古代科学史纲》", 30 June 1998, 河北科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111850565A (en) * | 2020-07-16 | 2020-10-30 | 昆山全亚冠环保科技有限公司 | Method for recovering gold and iodine from etching waste liquid |
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Address after: 215300 No. 135 CHENFENG East Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Applicant after: Guangyang new material technology (Kunshan) Co.,Ltd. Address before: 215000 south of CHENFENG Road, Wusongjiang Industrial Park, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Applicant before: KUNSHAN MULTIRESOURCE TECHNOLOGY Inc. |
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Application publication date: 20200410 |
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