RO115996B1 - PROCESS FOR RECOVERING WASTE NdFeB MAGNETIC ALLOY - Google Patents
PROCESS FOR RECOVERING WASTE NdFeB MAGNETIC ALLOY Download PDFInfo
- Publication number
- RO115996B1 RO115996B1 RO9800578A RO9800578A RO115996B1 RO 115996 B1 RO115996 B1 RO 115996B1 RO 9800578 A RO9800578 A RO 9800578A RO 9800578 A RO9800578 A RO 9800578A RO 115996 B1 RO115996 B1 RO 115996B1
- Authority
- RO
- Romania
- Prior art keywords
- solution
- magnetic alloy
- ndfeb magnetic
- recovering waste
- magnetic
- Prior art date
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- 239000002699 waste material Substances 0.000 title claims abstract description 12
- 229910001004 magnetic alloy Inorganic materials 0.000 title claims abstract description 11
- 229910001172 neodymium magnet Inorganic materials 0.000 title abstract description 11
- 238000000034 method Methods 0.000 title abstract description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 12
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 238000005469 granulation Methods 0.000 claims abstract description 5
- 230000003179 granulation Effects 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005984 hydrogenation reaction Methods 0.000 claims abstract description 3
- 238000005554 pickling Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Substances OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 abstract description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract description 6
- PXRKCOCTEMYUEG-UHFFFAOYSA-N 5-aminoisoindole-1,3-dione Chemical compound NC1=CC=C2C(=O)NC(=O)C2=C1 PXRKCOCTEMYUEG-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 abstract description 2
- 235000006408 oxalic acid Nutrition 0.000 abstract description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- 238000005530 etching Methods 0.000 abstract 1
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 235000017550 sodium carbonate Nutrition 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Invenția se referă la un procedeu de recuperare de aliaje magnetice NdFeB.The invention relates to a process for recovering NdFeB magnetic alloys.
Este cunoscut un procedeu chimic de recuperare a neodymului din deșeuri magnetice tip NdFeB, prin tratare cu acid acetic și acid fluorhidric și electroliză cu acid sulfuric și uscarea cu microunde a fluorurii de Nd obținută [ US 5362459],A chemical process for the recovery of neodymium from NdFeB type magnetic waste is known, by treatment with acetic acid and hydrofluoric acid and electrolysis with sulfuric acid and microwave drying of the obtained Nd fluoride [US 5362459],
Procedeul prezintă dezavantajul că nu permite o recuperare completă a componentelor materialului magnetic.The process has the disadvantage that it does not allow a complete recovery of the magnetic material components.
Problema care apare este de a realiza o recuperare avansată a componenților materialului magnetic NdFeB, printr-un procedeu economic și nepoluant.The problem that arises is to realize an advanced recovery of the components of the magnetic material NdFeB, through an economic and non-polluting process.
Procedeul de recuperare a deșeurilor de aliaje magnetice NdFeB, conform invenției, rezolvă această problemă, prin aceea că, în scopul recuperării deșeurilor de aliaje magnetice NdFeB, acestea sunt sortate după criteriul compoziției chimice, după care se decapează, în scopul îndepărtării oxizilor prin tratare cu soluție 10% de acid acetic sau amestec 1:1 soluții 10% de acid citric și oxalic și apoi soluție de 10% de NaOH sau Na2C03, după fiecare operație făcându-se spălare în jet de apă caldă, materialul astfel pregătit supunându-se hidrogenării, într-o incintă etanșă, la o presiune de 1...5 bar și la o temperatură de 1OO...15O°C, pentru a deveni friabil, în scopul ușurării operației de măcinare în moara cu bile, până la obținerea unei granulații de 3 ...6pm, care să permită procesarea pulberii după metode cunoscute.The process of recovering NdFeB magnetic alloy waste, according to the invention, solves this problem, in that, for the purpose of recovering NdFeB magnetic alloy waste, they are sorted according to the chemical composition criterion, after which they are pickled, in order to remove the oxides by treatment with 10% acetic acid solution or 1: 1 solution 10% citric and oxalic acid solution and then 10% NaOH or Na 2 C0 3 solution , after each operation being washed in hot water jet, the material thus prepared submitting -is hydrogenated, in a sealed enclosure, at a pressure of 1 ... 5 bar and at a temperature of 1OO ... 15 ° C, to become friable, in order to facilitate the milling operation in the ball mill, up to when obtaining a granulation of 3 ... 6pm, which allows the processing of the powder according to known methods.
Procedeul, conform invenției, oferă următoarele avantaje:The process according to the invention offers the following advantages:
- permite recuperarea integrală a deșeurilor de aliaje magnetice NdFeB, rezultate din operații de debitare;- allows full recovery of NdFeB magnetic alloy waste, resulting from cutting operations;
- permite obținerea unei granulații de 3...6pm, optimă pentru procesarea ulterioară a pulberii;- allows to obtain a granulation of 3 ... 6pm, optimal for the subsequent processing of the powder;
- carcteristicile magnetice obținute sunt reproductibile și conforme cu compoziția chimică;- the magnetic characteristics obtained are reproducible and conform to the chemical composition;
- nu necesită dotări tehnice costisitoare.- does not require expensive technical equipment.
Invenția este prezentată, în continuare, prin două exemple de aplicare, în legătură și cu fig. 1 și 2, care reprezintă caracteristicile magnetice ale magneților realizați cu materialul recuperat conform celor două exemple.The invention is further illustrated by two embodiments, in connection with FIG. 1 and 2, which represent the magnetic characteristics of the magnets made with the recovered material according to the two examples.
Exemplul 1. Conform invenției, deșeurile de aliaje magnetice NdFeB, cu sau fără adaosuri de Dy, Al, V, se supun operației de decapare prin tratare cu soluție 10% de acid acetic sau cu amestec 1:1 soluții 10% de acid citric și oxalic și apoi cu o soluție de 10% de NaOH sau Na2C03, după fiecare operație făcându-se spălare în jet de apă caldă, care are ca scop atât îndepărtarea produșilor de reacție, cât și a soluțiilor de decapare.Example 1. According to the invention, waste NdFeB magnetic alloys, with or without additions of Dy, Al, V, are subjected to pickling by treatment with 10% acetic acid solution or with 1: 1 10% citric acid solution and oxalic and then with a solution of 10% NaOH or Na 2 C0 3 , after each operation washing in hot water, which aims at both the removal of the reaction products and the pickling solutions.
Deșeurile decapate sunt apoi încărcate într-o incintă etanșă, în care se introduce hidrogen, la o presiune de 1...5 bar, după ce anterior s-a efectuat o vidare la o presiune de 2-1D2 1O2 bar.The pickled waste is then loaded into a sealed enclosure, in which hydrogen is introduced, at a pressure of 1 ... 5 bar, after previously a vacuum was carried out at a pressure of 2-1D 2 1O 2 bar.
Prin adsorbție de hidrogen, deșeurile de aliaje magnetice sinterizate devin friabile și pot fi foarte ușor măcinate într-o moară cu bile, pentru a se ajunge la o granulație de 3...6pm, care să permită recuperarea materialului, prin procesarea ulterioară a pulberii obținute.By hydrogen adsorption, the sintered magnetic alloy waste becomes brittle and can be easily ground in a ball mill, to reach a granulation of 3 ... 6pm, which will allow the material to be recovered, by further processing the powder. obtained.
Caracteristicile magnetice obținute pe un magnet realizat pe această cale sunt cele date în fig. 1.The magnetic characteristics obtained on a magnet made in this way are those given in fig. 1.
Exemplul 2. Pentru recuperarea deșeurilor de aliaje magnetice NdFeB, cu adaosuri de Co, acestea, după decapare și încărcare în incinta etanșă de hidrogenare, se încălzesc în atmosferă de hidrogen, la o presiune de 1...2 bar, la temperaturi cuprinse în intervalul 1OO...15O°C, pentru amorsarea reacției de adsorbție a hidrogenului.Example 2. For the recovery of waste NdFeB magnetic alloys, with Co additions, these, after pickling and loading in the hydrogenation enclosure, are heated in a hydrogen atmosphere, at a pressure of 1 ... 2 bar, at temperatures in in the range 1OO ... 15 ° C, for initiating the hydrogen adsorption reaction.
RO 115996 BlRO 115996 Bl
Materialul hidrogenat urmează etapele tehnologice obișnuite pentru procesarea 5 o aliajelor magnetice NdFeB.The hydrogenated material follows the usual technological steps for processing 5 NdFeB magnetic alloys.
Caracteristicile magnetice obținute sunt date în fig. 2.The magnetic characteristics obtained are given in fig. 2.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO9800578A RO115996B1 (en) | 1998-02-27 | 1998-02-27 | PROCESS FOR RECOVERING WASTE NdFeB MAGNETIC ALLOY |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO9800578A RO115996B1 (en) | 1998-02-27 | 1998-02-27 | PROCESS FOR RECOVERING WASTE NdFeB MAGNETIC ALLOY |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO115996B1 true RO115996B1 (en) | 2000-08-30 |
Family
ID=20106465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO9800578A RO115996B1 (en) | 1998-02-27 | 1998-02-27 | PROCESS FOR RECOVERING WASTE NdFeB MAGNETIC ALLOY |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO115996B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934450A (en) * | 2014-03-26 | 2014-07-23 | 辽宁五寰科技发展有限公司 | Method for reusing sintered reclaimed NdFeB material |
-
1998
- 1998-02-27 RO RO9800578A patent/RO115996B1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934450A (en) * | 2014-03-26 | 2014-07-23 | 辽宁五寰科技发展有限公司 | Method for reusing sintered reclaimed NdFeB material |
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