RU2011109473A - METHOD FOR PROCESSING GRIND WASTE FROM PRODUCTION OF PERMANENT MAGNETS - Google Patents
METHOD FOR PROCESSING GRIND WASTE FROM PRODUCTION OF PERMANENT MAGNETS Download PDFInfo
- Publication number
- RU2011109473A RU2011109473A RU2011109473/02A RU2011109473A RU2011109473A RU 2011109473 A RU2011109473 A RU 2011109473A RU 2011109473/02 A RU2011109473/02 A RU 2011109473/02A RU 2011109473 A RU2011109473 A RU 2011109473A RU 2011109473 A RU2011109473 A RU 2011109473A
- Authority
- RU
- Russia
- Prior art keywords
- formates
- temperature
- impurity elements
- rare
- grinding waste
- Prior art date
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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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
1. Способ переработки шлифотходов от производства постоянных магнитов Nd-Fe-В, включающий окисление шлифотходов при температуре 550-650°C в атмосфере воздуха с целью разрушения кристаллической решетки Nd2Fe14B с образованием Fe2O3, Nd2O3, Fe2B и удаления влаги и масла, выщелачивание неодима из шлифотходов азотной кислотой с концентрацией 1-2 моль/л при температуре 20-80°C, отличающийся тем, что нитратные растворы, содержащие редкоземельные и примесные элементы, обрабатывают раствором муравьиной кислоты до образования их формиатов. ! 2. Способ по п.1, отличающийся тем, что получаемые формиаты примесных элементов (железа, алюминия, никеля, кобальта, меди и других переходных металлов) остаются в растворе в виде растворимых солей соответствующих элементов, а РЗМ выделяются из него в виде осадка, очищенного от примесных элементов. ! 3. Способ по п.2, отличающийся тем, что при переработке отходов, содержащих кроме Nd и другие РЗМ (Pr, Dy, Tb), отпадает необходимость в экстракционной очистке и разделении полученных РЗМ. ! 4. Способ по п.3, отличающийся тем, что для получения безводных фторидов РЗЭ их формиаты подвергают твердофазному гидрофторированию при температуре 100°C с последующей сушкой и прокалкой с удалением влаги. 1. A method for processing grinding waste from the production of permanent magnets Nd-Fe-B, including oxidation of grinding waste at a temperature of 550-650 ° C in an air atmosphere in order to destroy the crystal lattice of Nd2Fe14B with the formation of Fe2O3, Nd2O3, Fe2B and remove moisture and oil, leaching neodymium from grinding waste with nitric acid with a concentration of 1-2 mol / l at a temperature of 20-80 ° C, characterized in that nitrate solutions containing rare earth and impurity elements are treated with a solution of formic acid until their formates are formed. ! 2. The method according to claim 1, characterized in that the resulting formates of impurity elements (iron, aluminum, nickel, cobalt, copper and other transition metals) remain in solution in the form of soluble salts of the corresponding elements, and rare earth metals are released from it in the form of a precipitate, cleaned from impurity elements. ! 3. The method according to claim 2, characterized in that when processing waste containing, in addition to Nd and other REM (Pr, Dy, Tb), there is no need for extraction purification and separation of the obtained REM. ! 4. The method according to claim 3, characterized in that, to obtain anhydrous rare-earth fluorides, their formates are subjected to solid-phase hydrofluorination at a temperature of 100 ° C, followed by drying and calcining to remove moisture.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2011109473/02A RU2469116C1 (en) | 2011-03-14 | 2011-03-14 | Processing method of micro production wastes of constant magnets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2011109473/02A RU2469116C1 (en) | 2011-03-14 | 2011-03-14 | Processing method of micro production wastes of constant magnets |
Publications (2)
Publication Number | Publication Date |
---|---|
RU2011109473A true RU2011109473A (en) | 2012-09-20 |
RU2469116C1 RU2469116C1 (en) | 2012-12-10 |
Family
ID=47077085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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RU2011109473/02A RU2469116C1 (en) | 2011-03-14 | 2011-03-14 | Processing method of micro production wastes of constant magnets |
Country Status (1)
Country | Link |
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RU (1) | RU2469116C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10351931B2 (en) | 2015-01-15 | 2019-07-16 | Worcester Polytechnic Institute | Separation of recycled rare earths |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62187112A (en) * | 1986-02-13 | 1987-08-15 | Santoku Kinzoku Kogyo Kk | Method for recovering rare earth element from rare earth element-iron type magnet material |
US5129945A (en) * | 1990-10-24 | 1992-07-14 | The United States Of America As Represented By The Secretary Of The Interior | Scrap treatment method for rare earth transition metal alloys |
JPH09217132A (en) * | 1996-02-13 | 1997-08-19 | Santoku Kinzoku Kogyo Kk | Method for recovering useful element from rare earth-iron alloy |
RU2097330C1 (en) * | 1996-07-11 | 1997-11-27 | Владимир Павлович Карманников | Method for processing scrap of permanent magnets containing rare-earth elements |
RU2111833C1 (en) * | 1996-07-31 | 1998-05-27 | Сибирский химический комбинат | Method of processing of grinding waste of manufacture of permanent magnets |
WO2003078671A1 (en) * | 2002-03-19 | 2003-09-25 | Santoku Corporation | Method for recovering useful element from rare earth - transition metal alloy scrap |
RU2369561C1 (en) * | 2008-03-24 | 2009-10-10 | Государственное образовательное учреждение высшего профессионального образования Томский политехнический университет | Method of extracting oxides of rare earth elements out of grinding wastes of constant magnet production |
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2011
- 2011-03-14 RU RU2011109473/02A patent/RU2469116C1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10351931B2 (en) | 2015-01-15 | 2019-07-16 | Worcester Polytechnic Institute | Separation of recycled rare earths |
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Publication number | Publication date |
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RU2469116C1 (en) | 2012-12-10 |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20130315 |