CN103440948B - A kind of reuse method of zinc-plated sintered NdFeB waste material - Google Patents
A kind of reuse method of zinc-plated sintered NdFeB waste material Download PDFInfo
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- CN103440948B CN103440948B CN201310357987.8A CN201310357987A CN103440948B CN 103440948 B CN103440948 B CN 103440948B CN 201310357987 A CN201310357987 A CN 201310357987A CN 103440948 B CN103440948 B CN 103440948B
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Abstract
A method for zinc-plated sintered NdFeB waste material recycling, after adopting the method for hot strip to get rid of zinc coating, then carries out powder process, shaping, sintering, makes middle high grade neodymium-iron-boron material; For zinc coating quality with magnet mass than the zinc-plated sintered NdFeB waste material being less than 0.5%, also Zn-ef ficiency can be considered as can not remove impurity, not carry out hot strip, directly carry out fragmentation, powder process, again again compressing, sintering, low grade neodymium-iron-boron material in making.Present invention completely avoids the problem of environmental pollution that chemical strip can cause, valuable element in neodymium iron boron waste material recycling process is simple, and rare earth element loss is little.
Description
Technical field
The present invention relates to Nd-Fe-Bo permanent magnet material, about the method for a kind of recycling of zinc-plated sintered NdFeB waste material.
Background technology
Sintered neodymium iron boron material surface is finished product after zinc-plated process, and zinc-plated finished product waste material generally all adopts chemical withdrawal plating, after being removed by zinc coat, then carries out Rare Earth Separation.CN1295357C has announced a kind of recovery method of valuable element in neodymium iron boron waste material, the method comprises rare earth extraction and reclaims separating technology, cobalt oxide recovery separating technology, iron oxide recovery process and relief liquor recovery process four operations, rare earth extraction reclaims separating technology and obtains that purity is 99.5% neodymia, purity is 99.5% dysprosia and purity is 99.5% terbium oxide, it is 99.5% cobalt oxide product that cobalt oxide recovery separating technology obtains purity, and it is 98.5% iron oxide that iron oxide recovery separating technology obtains magnetic level purity; Relief liquor recovery process obtains hydrochloric acid byproduct and the distilled condensed water of 15%.CN1255560C has announced one and has been applicable to the production method that neodymium iron boron waste material is raw material production neodymia, terbium oxide, dysprosia and cobalt oxide (or terbium dysprosium oxide), it is characterized in that have studied the chemical property of contained element in neodymium iron boron waste material, have selected waste material fine grinding pulverizing, oxidizing roasting, hydrochloric acid excellent molten, in and removal of impurities, double salt sink the means such as iron and extract and separate, successfully element valuable in neodymium iron boron waste material is extracted, obtain the higher neodymia of purity, terbium oxide, dysprosia, cobalt oxide.
Valuable element in neodymium iron boron waste material all adopts chemically separated method to extract, and its recycling also exists the problems such as environmental pollution is serious, cost is high, rare earth loss.
Summary of the invention
The present invention be directed to the above-mentioned state of the art and provide that a kind of environmental pollution is little, rare earth loss is few, do not carry out Rare Earth Separation and directly utilize zinc-plated sintered NdFeB waste material to prepare the method for neodymium iron boron product.
Technical scheme of the present invention is: a kind of method of zinc-plated sintered NdFeB waste material recycling, and its step comprises:
A, to be placed in heating furnace by zinc-plated sintered NdFeB waste material and to heat, be warmed up to 700 DEG C-900 DEG C, insulation 3-5 hour, is then cooled to room temperature, takes out;
B, the NdFeB material of taking-up is first removed surface contaminants after shot-blasting machine process, with jaw crusher, waste material coarse crushing is become the particle of below 25mm again, then intermediate crusher is used crushing material to be become the powder of below 3mm particle diameter, rare earth hydride is added in the ratio of 2-10wt% of powder, then stir 1-3 hour, make mixing of materials even;
C, will walk the mixed powder made through b, adopt airflow milling to be broken into the fine powder of 3-5 μm, the amount being 1 ‰-5 ‰ by fine powder mass ratio in described fine powder adds powder process additive, then stirs 1-3 hour with mixer;
D, by walk through c the powder pressing made shaping, sintering, make neodymium iron boron magnetic body.
For zinc coating quality with magnet mass than the zinc-plated sintered NdFeB waste material being less than 0.5%, its reuse method is:
A, jaw crusher coarse crushing is adopted to become the particle of below 25mm with magnet mass than the zinc-plated sintered NdFeB waste material being less than 0.5% zinc coating quality, then intermediate crusher is used crushing material to be become the powder of below 3mm particle diameter, rare earth hydride is added in the ratio of 2-10wt%, then stir 1-3 hour with mixer, make mixing of materials even;
B, will walk the mixed powder made through a, adopt airflow milling to be broken into the fine powder of 3-5 μm, the amount being 1 ‰-5 ‰ by fine powder mass ratio in described fine powder adds powder process additive, stirs 1-3 hour again with mixer;
C, by walk through b the powder pressing made shaping, sintering, make neodymium iron boron magnetic body.
The invention has the beneficial effects as follows: after adopting the method for hot strip to get rid of zinc coating for zinc-plated sintered NdFeB waste material, then carry out powder process, shaping, sintering, make middle high grade neodymium-iron-boron material; For zinc coating quality with magnet mass than the zinc-plated sintered NdFeB waste material being less than 0.5%, also Zn-ef ficiency can be considered as can not remove impurity, not carry out hot strip, directly carry out fragmentation, powder process, again again compressing, sintering, low grade neodymium-iron-boron material in making.Present invention completely avoids the problem of environmental pollution that chemical strip can cause, valuable element in neodymium iron boron waste material recycling process is simple, and rare earth element loss is little.
Embodiment
Embodiment one
Be placed in heating furnace by the zinc-plated sintered NdFeB waste material collected and heat, be warmed up to 700 DEG C-900 DEG C, product is heated to micro-red, and insulation 3-5 hour, comes off from neodymium iron boron surface after zinc is oxidized.Then by the cooling of neodymium iron boron waste material room temperature or air cooling, take out from stove.The NdFeB material of taking-up is carried out shot-blasting machine process, removes the attachment on neodymium iron boron surface.Jaw crusher is adopted NdFeB material coarse crushing to be become a material of below 25mm specification again, then intermediate crusher is used crushing material to be become the powder of below 3mm particle diameter, rare earth hydride is added by 2-10wt% amount of powder, rare earth hydride comprises the hydride of neodymium, praseodymium neodymium, dysprosium iron, gadolinium iron or holmium iron, then stir 1-3 hour, powder is mixed.Mixed powder is prepared into the fine powder of 3-5 μm through airflow milling, again stirs 1-3 hour, and the amount being 1 ‰-5 ‰ by fine powder mass ratio before each stirring adds powder process additive.Described powder process additive comprises gasoline and protection against oxidation agent; the mass ratio of gasoline and protection against oxidation agent is 5:2; protection against oxidation agent is poly(ethylene oxide) allyl ether or poly(ethylene oxide) allyl glycidyl ether; by shaping for the powder pressing after again stirring, sintering, make middle high grade neodymium-iron-boron magnet.
Embodiment two
For zinc coating quality with magnet mass than the zinc-plated sintered NdFeB waste material being less than 0.5%, jaw crusher is adopted waste material coarse crushing to be become a material of below 25mm specification, re-use the powder that crushing material is become below 3mm particle diameter by intermediate crusher, by the rare earth hydride of the following particle diameter of interpolation 3mm of 2-10wt% of powder, described rare earth hydride comprises the hydride of neodymium, praseodymium neodymium, dysprosium iron, gadolinium iron or holmium iron, then stir 1-3 hour, powder is mixed.Mixed powder is prepared into the fine powder of 3-5 μm through airflow milling, again stirs 1-3 hour, and the amount being 1 ‰-5 ‰ by fine powder mass ratio before each stirring adds powder process additive, and described powder process additive comprises gasoline and protection against oxidation agent.The mass ratio of gasoline and protection against oxidation agent is 5:2, and protection against oxidation agent is poly(ethylene oxide) allyl ether or poly(ethylene oxide) allyl glycidyl ether, by shaping for the powder pressing after again stirring, sintering, and low grade neodymium-iron-boron magnet in making.
Claims (3)
1. the method for a kind of recycling of zinc-plated sintered NdFeB waste material, its feature comprises the following steps:
A, to be placed in heating furnace by zinc-plated sintered NdFeB waste material and to heat, be warmed up to 700 DEG C-900 DEG C, insulation 3-5 hour, is then cooled to room temperature, takes out;
B, the NdFeB material of taking-up is first removed surface contaminants after shot-blasting machine process, with jaw crusher, waste material coarse crushing is become the particle of below 25mm again, then intermediate crusher is used crushing material to be become the powder of below 3mm particle diameter, rare earth hydride is added in the ratio of 2-10wt% of powder, then 1-3 hour is stirred, make mixing of materials even, the rare earth hydride of described interpolation is the hydride of neodymium or praseodymium neodymium or dysprosium iron or gadolinium iron or holmium iron;
C, will walk the mixed powder made through b, adopt airflow milling to be broken into the fine powder of 3-5 μm, the amount being 1 ‰-5 ‰ by fine powder mass ratio in described fine powder adds the powder process additive comprising gasoline and protection against oxidation agent, then stirs 1-3 hour with mixer;
D, by walk through c the powder pressing made shaping, sintering, make neodymium iron boron magnetic body.
2. the method for a kind of recycling of zinc-plated sintered NdFeB waste material according to claim 1, is characterized in that the mass ratio of described gasoline and protection against oxidation agent is 5:2.
3. the method for a kind of recycling of zinc-plated sintered NdFeB waste material according to claim 2, is characterized in that described protection against oxidation agent is poly(ethylene oxide) allyl ether or poly(ethylene oxide) allyl glycidyl ether.
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| CN103866127B (en) * | 2014-02-27 | 2017-01-04 | 中铝广西有色金源稀土股份有限公司 | A kind of method utilizing the regeneration Han neodymium iron boron waste material to prepare neodymium iron boron |
| CN104376943A (en) * | 2014-11-21 | 2015-02-25 | 湖南航天磁电有限责任公司 | Recycling and reusing method for sintered Nd-Fe-B forming waste |
| CN104439256A (en) * | 2014-11-24 | 2015-03-25 | 湖南航天磁电有限责任公司 | Method for recycling and reusing sintered Nd-Fe-B oxidation blank |
| CN104576019B (en) * | 2014-11-26 | 2017-02-22 | 宁波格荣利磁业有限公司 | Method for preparing NdFeB (neodymium-iron-boron) magnet by waste materials |
| CN104801717B (en) * | 2015-05-07 | 2017-11-14 | 安徽万磁电子有限公司 | A kind of recycling technique of zinc-plated sintered NdFeB waste material |
| CN104801719B (en) * | 2015-05-07 | 2017-12-19 | 安徽万磁电子有限公司 | A kind of recycling technique of nickel plating sintered NdFeB waste material |
| CN105274417B (en) * | 2015-10-20 | 2018-09-14 | 宁波科田磁业有限公司 | A method of preparing Nd-Fe-B magnet steel using neodymium-iron-boron air stream millby tailing |
| CN105251987A (en) * | 2015-11-12 | 2016-01-20 | 苏州萨伯工业设计有限公司 | Method for preparing dysprosium-contained rare earth permanent magnetic material by adding nanocrystalline metal powder in magnetic steel waste |
| CN105251984A (en) * | 2015-11-12 | 2016-01-20 | 苏州萨伯工业设计有限公司 | Method for preparing yttrium-contained rare-earth permanent magnet material by adding nanometer metal powder into magnetic steel waste |
| CN105251988A (en) * | 2015-11-12 | 2016-01-20 | 苏州萨伯工业设计有限公司 | Method for preparing cerium-containing rare earth permanent magnetic material by adding metal powder into waste magnetic steel |
| CN105251986A (en) * | 2015-11-12 | 2016-01-20 | 苏州萨伯工业设计有限公司 | Method for preparing holmium-contained rare-earth permanent magnet material by adding metal powder into magnetic steel waste |
| CN105215350A (en) * | 2015-11-12 | 2016-01-06 | 苏州萨伯工业设计有限公司 | The method of Nano metal powder preparation containing gadolinium rare earth permanent-magnetic material is added in steel refuse by magnetic |
| CN105598440A (en) * | 2015-11-12 | 2016-05-25 | 苏州萨伯工业设计有限公司 | Method for preparing dysprosium-containing rare earth permanent magnetic material by adding metal powder to waste magnetic steel |
| CN106920613B (en) * | 2017-02-28 | 2018-12-07 | 湖南稀土新能源材料有限责任公司 | Plate the method that protective layer sintered NdFeB waste material recycles |
| CN107564647A (en) * | 2017-08-14 | 2018-01-09 | 浙江东阳东磁稀土有限公司 | A kind of method that rare-earth Nd-Fe-B coating waste recovery recycles |
| CN107470640B (en) * | 2017-09-26 | 2019-10-01 | 北京京磁电工科技有限公司 | The waste material of neodymium iron boron magnetic body recycles preparation process |
| CN108188146A (en) * | 2017-12-28 | 2018-06-22 | 京磁材料科技股份有限公司 | Sintered NdFeB plates the recycling technique of Zn scrap returns |
| CN108251841A (en) * | 2018-02-01 | 2018-07-06 | 爱科科技有限公司 | A kind of neodymium-iron-boron permanent magnetic material surface zinc coat decoating liquid and preparation method |
| CN110480020B (en) * | 2019-09-12 | 2022-07-15 | 山东上达稀土材料有限公司 | Method for recycling sintered neodymium iron boron waste |
| CN112071546B (en) * | 2020-09-01 | 2024-04-12 | 安徽省瀚海新材料股份有限公司 | Processing method for producing modified NdFeB magnet by using NdFeB waste |
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| JPH0533077A (en) * | 1991-07-26 | 1993-02-09 | Tdk Corp | Method for reuse of ni-coated rare earth alloy |
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Address after: 315031 Cicheng Town West Gate, Jiangbei District, Ningbo City, Zhejiang Province Patentee after: Ningbo Ketian Magnetic Industry Co.,Ltd. Patentee after: NINGBO JINTIAN COPPER (GROUP) Co.,Ltd. Address before: 315034, No. 1 Chengxi West Road, Jiangbei Town, Jiangbei District, Zhejiang, Ningbo Patentee before: NINGBO KETIAN MAGNET Co.,Ltd. Patentee before: NINGBO JINTIAN COPPER (GROUP) Co.,Ltd. |
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