RU2013127843A - METHOD FOR EXTRACTING RARE-EARTH AND NOBLE METALS FROM ASH AND SLAGS - Google Patents
METHOD FOR EXTRACTING RARE-EARTH AND NOBLE METALS FROM ASH AND SLAGS Download PDFInfo
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- RU2013127843A RU2013127843A RU2013127843/02A RU2013127843A RU2013127843A RU 2013127843 A RU2013127843 A RU 2013127843A RU 2013127843/02 A RU2013127843/02 A RU 2013127843/02A RU 2013127843 A RU2013127843 A RU 2013127843A RU 2013127843 A RU2013127843 A RU 2013127843A
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- noble metals
- microorganisms
- ash
- rare earth
- earth
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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
1. Способ извлечения редкоземельных и благородных металлов из золошлаков энергетических предприятий, включающий подготовку золошлаков, смешение их с выщелачивающим раствором, накопление биомассы микроорганизмов, бактериальное выщелачивание редкоземельных и благородных металлов, разделение полученной суспензии на осадок и осветленную жидкость с выделением из последней редкоземельных и благородных металлов и обезвоживание осадка, при этом на стадии накопления биомассы микроорганизмов добавляют насыщенный раствор карбоната кальция в количестве 1-10% от расхода выщелачивающего раствора, а бактериальное выщелачивание редкоземельных и благородных металлов проводят в режиме многокамерной флотации с интенсивностью аэрации 0,1-0,5 м/м·мин, причем интенсивность аэрации в каждой последующей камере снижают по сравнению с предыдущей на 5-10%.2. Способ по п.1, отличающийся тем, что в качестве микроорганизмов используют бактерии рода Acidithiobacillales.3. Способ по п.1, отличающийся тем, что флотацию осуществляют с использованием мелкодисперсной аэрации со средним размером пузырьков от 20 до 300 мкм.4. Способ по п.1 или 3, отличающийся тем, что размер пузырьков в каждой последующей камере увеличивают на 10-15%.1. A method of extracting rare earth and noble metals from ash and slag of power plants, including the preparation of ash and slag, mixing them with a leaching solution, accumulation of biomass of microorganisms, bacterial leaching of rare earth and noble metals, separation of the resulting suspension into sediment and clarified liquid with the release of rare earth and noble metals from the latter and sludge dewatering, while at the stage of accumulation of biomass of microorganisms, a saturated solution of calcium carbonate is added in an amount of 1-10% of the consumption of the leaching solution, and bacterial leaching of rare-earth and noble metals is carried out in the multi-chamber flotation mode with aeration intensity of 0.1-0.5 m / m · min, and the intensity of aeration in each subsequent chamber is reduced in comparison with the previous one by 5-10%. 2. The method according to claim 1, characterized in that bacteria of the genus Acidithiobacillales are used as microorganisms. The method according to claim 1, characterized in that the flotation is carried out using fine aeration with an average bubble size of 20 to 300 μm. The method according to claim 1 or 3, characterized in that the size of the bubbles in each subsequent chamber is increased by 10-15%.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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RU2013127843/02A RU2537634C1 (en) | 2013-06-20 | 2013-06-20 | Method of extracting rare earth and noble metals from ash and slag |
Applications Claiming Priority (1)
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RU2013127843/02A RU2537634C1 (en) | 2013-06-20 | 2013-06-20 | Method of extracting rare earth and noble metals from ash and slag |
Publications (2)
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RU2013127843A true RU2013127843A (en) | 2014-12-27 |
RU2537634C1 RU2537634C1 (en) | 2015-01-10 |
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RU2013127843/02A RU2537634C1 (en) | 2013-06-20 | 2013-06-20 | Method of extracting rare earth and noble metals from ash and slag |
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RU (1) | RU2537634C1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113046579A (en) * | 2021-03-09 | 2021-06-29 | 中南大学 | Method for biologically and chemically synergistically leaching weathering crust leaching type rare earth ore |
CN113046553A (en) * | 2021-03-09 | 2021-06-29 | 中南大学 | Method for leaching weathering crust elution type rare earth ore by regulating microbial community structure |
CN115232981A (en) * | 2022-08-24 | 2022-10-25 | 深圳市中金岭南有色金属股份有限公司 | Biological leaching method of copper-zinc flotation tailings based on aeration oxidation and waste acid curing |
CN115679131A (en) * | 2022-11-02 | 2023-02-03 | 中南大学 | Method for recovering rare earth from rare earth bioleaching solution through solution structure transformation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105063383B (en) * | 2015-09-18 | 2020-07-03 | 朱上翔 | Ion type rare earth in-situ leaching method process improved by activated ionized water and microbial acid |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL96611A (en) * | 1990-10-12 | 1995-06-29 | Israel Electric Corp Ltd | Extraction of metal oxides from coal fly ash by microorganisms and a new microorganism useful therefor |
IL100950A (en) * | 1992-02-14 | 1997-01-10 | Israel Electric Corp Ltd | Bioleaching method for the extraction of metals from coal fly ash using thiobacillus |
GB2298643B (en) * | 1993-12-03 | 1997-12-24 | Geobiotics Inc | Biooxidation of refractory sulfide ores |
RU2138339C1 (en) * | 1998-04-06 | 1999-09-27 | Омский государственный университет | Method of preparing coal-combustion fly ash for utilization in manufacture of building materials |
AU2003263464B2 (en) * | 2002-09-17 | 2010-02-18 | Technological Resources Pty Limited | Heap leach process |
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2013
- 2013-06-20 RU RU2013127843/02A patent/RU2537634C1/en active
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113046579A (en) * | 2021-03-09 | 2021-06-29 | 中南大学 | Method for biologically and chemically synergistically leaching weathering crust leaching type rare earth ore |
CN113046553A (en) * | 2021-03-09 | 2021-06-29 | 中南大学 | Method for leaching weathering crust elution type rare earth ore by regulating microbial community structure |
CN113046553B (en) * | 2021-03-09 | 2022-02-22 | 中南大学 | Method for leaching weathering crust elution type rare earth ore by regulating microbial community structure |
CN115232981A (en) * | 2022-08-24 | 2022-10-25 | 深圳市中金岭南有色金属股份有限公司 | Biological leaching method of copper-zinc flotation tailings based on aeration oxidation and waste acid curing |
CN115232981B (en) * | 2022-08-24 | 2024-05-14 | 深圳市中金岭南有色金属股份有限公司 | Biological leaching method of copper-zinc flotation tailings based on aeration oxidation and waste acid curing |
CN115679131A (en) * | 2022-11-02 | 2023-02-03 | 中南大学 | Method for recovering rare earth from rare earth bioleaching solution through solution structure transformation |
CN115679131B (en) * | 2022-11-02 | 2024-03-01 | 中南大学 | Method for recovering rare earth from rare earth bioleaching solution through solution structure transformation |
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RU2537634C1 (en) | 2015-01-10 |
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