CN1031650C - Magnetic levitation cooling technology for obtaining high-purity rare-earth metals - Google Patents
Magnetic levitation cooling technology for obtaining high-purity rare-earth metals Download PDFInfo
- Publication number
- CN1031650C CN1031650C CN91108418A CN91108418A CN1031650C CN 1031650 C CN1031650 C CN 1031650C CN 91108418 A CN91108418 A CN 91108418A CN 91108418 A CN91108418 A CN 91108418A CN 1031650 C CN1031650 C CN 1031650C
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- CN
- China
- Prior art keywords
- magnetic levitation
- cooling technology
- earth metals
- rare earth
- purity
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- Expired - Fee Related
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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 present invention discloses a method for manufacturing a high-purity rare-earth metal (Tb Dy) by using a magnetic levitation cooling technology. Compared with a method generally used for refining rare-earth metals, the method preferably solves the problems of pollution of zone melting crucibles to matter, and corrosion of melt to zone melting crucibles, and provides reliable assurance for the manufacture of high-purity rare earth, and simultaneously, a magnetic levitation cooling boat can be repeatedly used multiple times so as to reduce the cost of zone refining.
Description
The present invention is the method for a kind of manufacturing high pure rare earth metals (Tb, Dy metal).It is characterized in that purifying with the magnetic levitation cooling technology.
The method of rare-earth metal Tb, Dy of being generally used for purifying is a zone melting technique, and the molten used boat (crucible) in district is often made by refractory materialss such as BN, quartz.Because the high reactivity of rare-earth metal Tb, Dy, in purification process, melt is subject to boat material impurities and pollutes, and the final purity of purification material is affected.Simultaneously since rare-earth metal Tb, Dy melt to the erosion of boat material, it is serious that the molten boat in district is destroyed, and is difficult to reuse, thereby increased the cost of zone-refine.
People such as D.W Jones (see " Proc Rare Earth Res.Conf.13th ", 1977p.309-314) attempted with elements such as magnetic levitation cooling technology purification La, Ga, can reduce foreign matter content in the rare earth metal, but do not illustrate used device, processing parameter and performance index in this article, domesticly also do not see similar patent.
Purpose of the present invention will provide a kind of exactly can overcome above-mentioned shortcoming, produces the method for high pure rare earth metals.
Task of the present invention is finished with following method, in systematic study among rare-earth metal Tb, the Dy major impurity its solid-liquid mutually on the basis of the difference of segregation coefficient and magnetcisuspension floating region process of smelting parameter control method, proposed to utilize the molten magnetic levitation cooling technology in district to make the method for high pure rare earth metals (Tb, Dy).
Adopt the molten magnetic levitation cooling technology in district, to rare-earth metal Tb, when Dy purifies, adopted the magnetic levitation cold boat, be the copper or copper gold-plated water-cooling structure of many lobes (10-30 lobe), capacity is 20-500ml.District's fuse circle is copper individual layer or double-deck water cooled coil, and heating power is 5-150KW, and district's melting temperatur is 600-1500 ℃, and induction frequencies is 50-400KHZ, coil displacements speed 0.1-50mm/ branch, and district's heat number is 1-40 times.
At first will distinguish molten magnetic levitation cold boat and rare earths material during purification and be sealed in simultaneously in the silica tube, and adopt purity greater than 99.99%, (Wt%) argon gas is made protection atmosphere, and malleation is 0.1-1MPa in the pipe.Secondly will distinguish the end that the medium melt of cold boat is adjusted in fuse circle position, begin to heat up after fixing the position, the intensification degree is greater than 5 ℃/minute, after treating that melt in the raw material melting zone, suspension breaks away from and the boat wall contacts, operating coil begins to move to the other end for the treatment of melt with 0.1-50mm/ component velocity, and when coil moved to the other end terminal point, suspension coil moved, stop the output of coil heating power, distinguish the clinkering bundle for the first time.To distinguish the fuse circle again when beginning for the second time and be moved back into starting position, the Comprehensive Control above-mentioned parameter, the molten number of times in district repeats above operating process on demand, and after product reached qualified requirement, the molten process in district was all over.
Adopting above-mentioned ginseng to state Comprehensive Control, is molten 10-15 times of 99% (wt%) Tb, Dy district to purity, can make its local purity bring up to 99.9%, and molten 20-40 times of district can make its local purity reach 99.99%.
The present invention, because the raw material melting zone is suspended state when melting purifying technique in the trial plot, broken away from and the contacting of boat wall material, thereby it preferably resolve the molten boat material in district to the pollution of melt and melt to distinguishing the erosion problem of molten boat, for the manufacturing of high-purity rare-earth provides reliable assurance, the magnetic levitation cold boat can repeat repeatedly to use simultaneously, thereby has reduced the zone-refine cost.
Claims (3)
1, makes the method for high pure rare earth metals with the magnetic levitation cooling technology, it is characterized in that adopting the magnetic levitation cooling technology to purify, type of heating is the high-frequency induction formula, induction line is that copper individual layer belongs to double-deck little cold line circle, heating power 5-150KW, 600-1500 ℃ of district's melting temperaturs, frequency 50-400KHZ; Coil displacements speed 0.1-50mm/ branch, several 1-40 times of district's heat; Adopt the argon gas positive pressure protection.
2, make the method for high-purity rare earth metal according to claim 1 is described with the magnetic levitation cooling technology, it is characterized in that the magnetic levitation cold boat is the copper or copper water-cooling structures of many lobes (10-30 lobe), capacity is 20-500ml.
3, according to the described method of claim 1 with magnetic levitation cooling technology manufacturing high pure rare earth metals, it is characterized in that adopting in the stove purity to make protection atmosphere greater than the argon gas of 99.99% (wt%), malleation is 0.1-1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91108418A CN1031650C (en) | 1991-10-30 | 1991-10-30 | Magnetic levitation cooling technology for obtaining high-purity rare-earth metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91108418A CN1031650C (en) | 1991-10-30 | 1991-10-30 | Magnetic levitation cooling technology for obtaining high-purity rare-earth metals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060314A CN1060314A (en) | 1992-04-15 |
| CN1031650C true CN1031650C (en) | 1996-04-24 |
Family
ID=4909281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91108418A Expired - Fee Related CN1031650C (en) | 1991-10-30 | 1991-10-30 | Magnetic levitation cooling technology for obtaining high-purity rare-earth metals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031650C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251664B (en) * | 2016-12-29 | 2021-05-04 | 有研稀土新材料股份有限公司 | Rare earth metal and method for purifying rare earth metal |
| CN111206162B (en) * | 2020-02-25 | 2021-02-02 | 中国科学院金属研究所 | Rare earth metal purification method and purification equipment |
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1991
- 1991-10-30 CN CN91108418A patent/CN1031650C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1060314A (en) | 1992-04-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |