CN104651612B - The method of molten rare earth waste recovery rare earth - Google Patents
The method of molten rare earth waste recovery rare earth Download PDFInfo
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- CN104651612B CN104651612B CN201310579740.0A CN201310579740A CN104651612B CN 104651612 B CN104651612 B CN 104651612B CN 201310579740 A CN201310579740 A CN 201310579740A CN 104651612 B CN104651612 B CN 104651612B
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- rare earth
- alloy
- metal
- magnesium
- molten
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 65
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 56
- 239000002699 waste material Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 17
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 15
- 239000011777 magnesium Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 230000004927 fusion Effects 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 10
- 150000001342 alkaline earth metals Chemical class 0.000 abstract description 10
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 description 3
- -1 halide salts Chemical class 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
- 238000005658 halogenation reaction Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to the treatment of industrial residue, and in particular to a kind of method of molten rare earth waste recovery rare earth.The method is comprised the following steps：（1）800~1200 DEG C of high-temperature fusions will be heated under rare earth waste sealing state；（2）Magnesium metal is subsequently adding, the addition of magnesium is the 1/12 to 1/8 of rare earth waste weight, melting keeps 800~1200 DEG C of 4~6 hours of heating under stirring；（3）Motlten metal is set to naturally cool to room temperature；（4）Metallographic Analysis is carried out to metal section, Nd Mg alloy-layers is cut and is separated, compareed with various existing trade mark series Nd Mg alloys by computer, the alloy-layer for selecting immediate subject alloy carrys out cast magnesium alloy.The present invention has both reclaimed rare earth element, and the new useful senior alloy of rare earth/alkaline-earth metal is formd again, reduces environmental pollution, and has saved resource, and operation is simple.
Description
Technical field
The present invention relates to the treatment of industrial residue, and in particular to a kind of method of molten rare earth waste recovery rare earth.
Background technology
Quickly, so that electronic product updates, the cycle is shorter and shorter, in electronic product, especially for modern development in science and technology speed
During it is the electronic product with luminescent material, containing a large amount of rare earth materials, electronic product it is a large amount of discarded, both cause environment
Pollution, while also resulting in the waste of resource.The patent document of Publication No. CN102046820A discloses a kind of rare earth element
Recovery method and retracting device, be immersed in rare earth alloy in the fuse salt of halide salts by the method, the halogenation of rare earth element
Thing dissolution is in fuse salt, or the rare earth alloy waste material coexisted with least one party in Fe and Cu is existed with metal chloride gas
Reacted at a temperature of 1300~1800K, with the vaporous form selective extraction rare earth alloy waste material of rare earth element chloride
The step of rare earth element.But it is to be reacted by metal and halide, generates volatilizable rare earth halide, makes at a certain temperature
Rare earth halide volatilization turns into gas, and is separated from waste material, and its deficiency is reaction temperature higher, and easily causes environment
Pollution.
The content of the invention
It is of the invention to provide a kind of, it is contemplated that using in alkaline-earth metal melting extraction obsolete material of the recovery containing rare earth
Rare earth element, and form the new useful senior alloy of rare earth/alkaline-earth metal.
The method of molten rare earth waste recovery rare earth of the invention is comprised the following steps：
（1）800~1200 DEG C of high-temperature fusions will be heated under rare earth waste sealing state；
（2）Magnesium metal is subsequently adding, the addition of magnesium is the 1/12 to 1/8 of rare earth waste weight, melting, under stirring
Kept for 800~1200 DEG C of 4~6 hours of heating；
（3）Motlten metal is set to naturally cool to room temperature；
（4）Metallographic Analysis is carried out to metal section, Nd-Mg alloy-layers is cut and is separated, it is existing with various by computer
Trade mark series Nd-Mg alloys are compareed, and the alloy-layer for selecting immediate subject alloy carrys out cast magnesium alloy.
Preferably,
Step（1）1000 DEG C of high-temperature fusions are heated under the middle sealing state by rare earth waste；
Step（2）The addition of middle magnesium metal is the 1/10 of rare earth waste weight；
Step（2）120 DEG C of 5 hours of heating are kept under stirring；
Step（4）Select immediate subject alloy Mg-2.5Nd-0.2Zn-0.4Zr cast magnesium alloys.
The present invention melts alkaline-earth metal and rare earth waste at a certain temperature, by the contact of certain hour, rare earth from
Separated out in waste material phase, be gradually transferred in alkaline-earth metal extract phase.Then by analyzing the group of rare earth metal and alkaline-earth metal
Divide ratio, sets target component is compareed with existing alloy designations, add a certain amount of rare earth or alkaline-earth metal and other components
Metal, forms the new senior alloy of rare earth/alkaline-earth metal.Both rare earth element has been reclaimed, new useful rare earth/alkali has been formd again
The senior alloy of earth metal, reduces environmental pollution, and saved resource.The present invention is using rare earth and impurity and alkaline-earth metal
The mutual difference of molten ability under uniform temperature molten condition, and cause that rare earth and impurity are separated, by rare earth extraction to adding
Plus alkaline-earth metal in, residual impurity is simple to operation as one layer.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this
A little embodiments.
Embodiment one
The method of molten rare earth waste recovery rare earth, comprises the following steps that：
10kg Nd2Fe14B is heated to 1000 DEG C of high-temperature fusions in tantalum crucible is sealed, and adds the magnesium of 1 kg, melting, stirring
1000 DEG C of 5 hours of heating are kept under state.Stop stirring, cut off thermal source, make motlten metal spontaneous curing to room temperature.To crucible
Middle metal section carries out Metallographic Analysis, can be clearly seen that obsolete material and Nd-Mg alloys there occurs obvious layering.Will
The cutting of Nd-Mg alloy-layers is separated, and calculates wherein Mg：Nd mass ratioes are 1:2.4. it is 3.4kg to weigh Nd-Mg alloy-layers gross weight,
Obsolete material 7.6kg, a small amount of Nd are remained in obsolete material, not separated out completely into magnesium phase.It is existing with various by computer
There are trade mark series Nd-Mg alloys to compare, select immediate subject alloy Mg-2.5Nd-0.2Zn-0.4Zr cast magnesium alloys.It is logical
Calculating is crossed, 0.1kgNd, 0.2kgZn is added, 0.4kgZr, common melting mixing produces subject alloy Mg-2.5Nd-
0.2Zn-0.4Zr amounts to 4.1kg.
Embodiment two
The method of molten rare earth waste recovery rare earth, step is as follows：
（1）800 DEG C of high-temperature fusions will be heated under rare earth waste sealing state；
（2）Magnesium metal is subsequently adding, the addition of magnesium is the 1/12 of rare earth waste weight, and melting keeps under stirring
800 DEG C of 6 hours of heating；
（3）Motlten metal is set to naturally cool to room temperature；
（4）Metallographic Analysis is carried out to metal section, Nd-Mg alloy-layers is cut and is separated, it is existing with various by computer
Trade mark series Nd-Mg alloys are compareed, and the alloy-layer for selecting immediate subject alloy carrys out cast magnesium alloy.
Embodiment three
The method of molten rare earth waste recovery rare earth, step is as follows：
（1）1200 DEG C of high-temperature fusions will be heated under rare earth waste sealing state；
（2）Magnesium metal is subsequently adding, the addition of magnesium is the 1/8 of rare earth waste weight, and melting keeps under stirring
1200 DEG C of 5 hours of heating；
（3）Motlten metal is set to naturally cool to room temperature；
（4）Metallographic Analysis is carried out to metal section, Nd-Mg alloy-layers is cut and is separated, it is existing with various by computer
Trade mark series Nd-Mg alloys are compareed, and the alloy-layer for selecting immediate subject alloy carrys out cast magnesium alloy.
Claims (5)
1. the method for molten rare earth waste recovery rare earth, it is characterized in that, comprise the following steps：
（1）800~1200 DEG C of high-temperature fusions will be heated under rare earth waste sealing state；
（2）Magnesium metal is subsequently adding, the addition of magnesium is the 1/12 to 1/8 of rare earth waste weight, and melting keeps under stirring
800~1200 DEG C of 4~6 hours of heating；
（3）Motlten metal is set to naturally cool to room temperature；
（4）Metallographic Analysis is carried out to metal section, Nd-Mg alloy-layers is cut and is separated, by computer and the various existing trades mark
Serial Nd-Mg alloys control, the alloy-layer for selecting immediate subject alloy carrys out cast magnesium alloy.
2. the method for molten rare earth waste recovery rare earth according to claim 1, it is characterized in that, step（1）It is middle that rare earth gives up
1000 DEG C of high-temperature fusions are heated under material sealing state.
3. the method for molten rare earth waste recovery rare earth according to claim 1, it is characterized in that, step（2）Middle magnesium metal
Addition is the 1/10 of rare earth waste weight.
4. the method for molten rare earth waste recovery rare earth according to claim 1, it is characterized in that, step（2）Under stirring
Kept for 1200 DEG C of 5 hours of heating.
5. the method for molten rare earth waste recovery rare earth according to claim 1, it is characterized in that, step（4）Select closest
Subject alloy Mg-2.5Nd-0.2Zn-0.4Zr cast magnesium alloys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310579740.0A CN104651612B (en) | 2013-11-19 | 2013-11-19 | The method of molten rare earth waste recovery rare earth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310579740.0A CN104651612B (en) | 2013-11-19 | 2013-11-19 | The method of molten rare earth waste recovery rare earth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104651612A CN104651612A (en) | 2015-05-27 |
| CN104651612B true CN104651612B (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310579740.0A Active CN104651612B (en) | 2013-11-19 | 2013-11-19 | The method of molten rare earth waste recovery rare earth |
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| Country | Link |
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| CN (1) | CN104651612B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108411115B (en) * | 2018-04-13 | 2019-07-09 | 萍乡鑫森新材料有限责任公司 | A kind of rare earth waste recycling processing device system and processing method |
| CN115418507B (en) * | 2022-09-30 | 2023-07-21 | 内蒙古科技大学 | A method for separating rare earth from rare earth slag by natural gravity sedimentation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335925A (en) * | 1998-12-25 | 2002-02-13 | 昭和电工株式会社 | Method and device for melting rare earth magnet scrap and primary molten alloy of rare earth magnet |
| CN1407121A (en) * | 2001-07-10 | 2003-04-02 | 信越化学工业株式会社 | Remoltem rareearth magnet waste and/or scraps, magnet forming alloy and sintered rareearth magnets |
| CN102046820A (en) * | 2008-03-26 | 2011-05-04 | 财团法人生产技术研究奖励会 | Method and apparatus for collection of rare earth element |
| CN102325911A (en) * | 2009-02-27 | 2012-01-18 | 国立大学法人大阪大学 | Method for recovering rare earth elements from RE-TM mixture |
-
2013
- 2013-11-19 CN CN201310579740.0A patent/CN104651612B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335925A (en) * | 1998-12-25 | 2002-02-13 | 昭和电工株式会社 | Method and device for melting rare earth magnet scrap and primary molten alloy of rare earth magnet |
| CN1407121A (en) * | 2001-07-10 | 2003-04-02 | 信越化学工业株式会社 | Remoltem rareearth magnet waste and/or scraps, magnet forming alloy and sintered rareearth magnets |
| CN102046820A (en) * | 2008-03-26 | 2011-05-04 | 财团法人生产技术研究奖励会 | Method and apparatus for collection of rare earth element |
| CN102325911A (en) * | 2009-02-27 | 2012-01-18 | 国立大学法人大阪大学 | Method for recovering rare earth elements from RE-TM mixture |
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| Publication number | Publication date |
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| CN104651612A (en) | 2015-05-27 |
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Effective date of registration: 20201015 Address after: No. 3, Yingchun Avenue, Jingmen hi tech Industrial Development Zone, Jingmen City, Hubei Province Patentee after: Green beauty (Jingmen) electronic waste disposal Co., Ltd Address before: 448124 hi tech Industrial Development Zone, Jingmen, Hubei, Jingmen Patentee before: JINGMEN GREEN ECO-MANUFACTURE NEW MATERIAL Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |
Address after: No. 3, Yingchun Avenue, Jingmen hi tech Industrial Development Zone, Jingmen City, Hubei Province Patentee after: Jingmen green recycling electronic waste disposal Co.,Ltd. Address before: No. 3, Yingchun Avenue, Jingmen hi tech Industrial Development Zone, Jingmen City, Hubei Province Patentee before: Green beauty (Jingmen) electronic waste disposal Co., Ltd |
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