CN105177296A - Method for recycling and regenerating neodymium iron boron sheet - Google Patents
Method for recycling and regenerating neodymium iron boron sheet Download PDFInfo
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- CN105177296A CN105177296A CN201510503073.7A CN201510503073A CN105177296A CN 105177296 A CN105177296 A CN 105177296A CN 201510503073 A CN201510503073 A CN 201510503073A CN 105177296 A CN105177296 A CN 105177296A
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- iron boron
- neodymium iron
- hydrogen
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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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Abstract
The invention discloses a method for recycling and regenerating a neodymium iron boron sheet. Boiling, airing, polishing, sorting, cleaning, drying and hydrogen explosion are conducted on the neodymium iron boron sheet generated in the neodymium iron boron machining process for producing, machining and reusing the neodymium iron boron sheet. Sufficient utilization of resources is achieved by producing and machining neodymium iron boron sheet residues, the cost of rare earth raw materials is greatly reduced, and secondary pollution is avoided. Process control can be achieved by the adoption of existing equipment, high-tech equipment does not need to be added, and the production cost is low.
Description
Technical field
The invention belongs to neodymium iron boron strong magnetic manufacturing technology field, be specifically related to a kind of efficient recycling method of neodymium iron boron processibility material skin.
Background technology
China is rare earth big country, and in " National Program for Medium-to Long-term Scientific and Technological Development ", rare earth material is put into the preferential theme of manufacture field basic raw material, belongs to the emphasis support direction of basic raw material.On February 22nd, 2012, the Ministry of Industry and Information Technology of China has formally issued " new material industry " 12 " development program ", Rare Earth Functional Materials etc. is also clearly development priority by " planning ", rare earth permanent-magnetic material, as member largest in Rare Earth Functional Materials, continues to obtain country in " 12 " period and supports energetically.
Rare earth resources is always as the catalyzer of the modernization of industry, and be widely used in multiple fields such as military affairs, petrochemical complex, medical treatment, communication, the exploitation of rare earth has extremely important strategic position.China leader Deng Xiaoping once said " my Boyou's oil; in state-owned rare earth " indicate China and have abundant rare earth resources, but China's rare earth accounts for the world 36%, and annual output Que Zhan world ratio is up to 90%, and long-term excessive exploitation result in pollution and the destruction of environment.Rare earth starting material lay special stress on protecting the strategic position of resource because its non-renewable characteristic determines it as China, and the efficient economizing how reducing costs, realize rare earth resources utilizes, and becomes the major issue of rare earth permanent-magnetic material processing and manufacturing industry research.
Nd-Fe-B magnet steel is by several noble metals, is made according to strict formula and strict production technique, and have magnetic strong, anti-demagnetization capability high is widely used in the every field such as automobile, medical treatment, military affairs, life.
At present, rare-earth permanent magnet industry there will be a large amount of material skins etc. in process of manufacture, because the material skin impurity of converted products is too much, general producer is in order to ensure the stability of magnet steel product, all cannot realize the recycling of material skin, cause the rare earth resources of about 5%-10% to waste, even if return special raw material refinery to go process, also can cause secondary pollution to environment; And reprocessing cost is high, correlated resources loss is serious.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, a kind of reclaiming method of neodymium iron boron material skin is provided, realize the recycling to neodymium iron boron material skin.
The neodymium iron boron material skin that neodymium iron boron produces in the course of processing, can mix a lot of impurity and greasy dirt, and neodymium iron boron is produced higher to the purity requirement of raw material, and this is also cause expecting that skin directly cannot reclaim the factor of use.So must thoroughly be cleaned up by neodymium iron boron material skin, to guarantee performance index and the stability of product, to neodymium iron boron material skin through technical finesse, reach clean object, then by follow-up technology controlling and process, realize the process for processing recycling of neodymium iron boron material cladding skin.
The reclaiming method of neodymium iron boron material skin provided by the invention, concrete grammar step is as follows:
One, material is boiled: boil material to neodymium iron boron material skin, wipe oil, cull under adopting the temperature condition of process furnace more than 100 DEG C, then the artificial neodymium iron boron material skin to boiling is selected materials, and removes impurity, is dried by neodymium iron boron material skin afterwards;
Two, polishing: adopt nest ox beveler that sawdust is housed that the neodymium iron boron material skin after drying is carried out polished finish;
Three, sorting: during neodymium iron boron material skin discharging after polished finish, the sawdust blowout adopting air gun wherein to mix, goes to material skin point constituency afterwards and carries out sorting, and carry out mark to well-graded material skin;
Four, clean: cleaned by well-graded neodymium iron boron material skin cleaning agent, cleaned up by the residual sawdust dust being attached to neodymium iron boron material epidermis face, discharging is afterwards dried;
Five, hydrogen tear reason: adopt hydrogen blasting furnace to carry out hydrogen tear reason to clean dried neodymium iron boron material skin, nitrogen, argon pressure are 0.3 ± 0.05MPa, as vacuum tightness < 2Pa, hydrogen main valve pressure is transferred to 0.5MPa, suction hydrogen pressure table is transferred to 0.1 ± 0.01Mpa, start to inhale hydrogen, after inhaling hydrogen 40min, close hydrogen valve; Open bleed valve after suction hydrogen terminates and be vented to normal pressure, then open mechanical pump and vacuumize dehydrogenation, start heating when vacuum tightness reaches 2000Pa, every 20 minutes rotating furnaces 5 minutes, desorption temperature is 550 DEG C ± 10 DEG C, and dehydrogenation time is 1-6h, after dehydrogenation terminates, cooling discharging.
Described sawdust is granularity is 60-80 object wood chip; Described air gun air pressure is 0.4-0.6MPa; The pH value of described cleaning agent is 9-14.
The reclaiming method of neodymium iron boron material skin provided by the invention, its beneficial effect is, method is simple, workable, easy management and control; Adopt existing equipment just can realize technology controlling and process, without the need to increasing high new installation, production cost is low; Adopt process for processing remaining neodymium iron boron material skin, realize making full use of of resource, and greatly reduce rare earths material cost; Use through the neodymium iron boron material skin of method process provided by the invention, the property indices of the neodymium iron boron product of production and having good stability; The material micromicro that processing produces realizes repeatedly recycling, and can not produce secondary pollution.
Embodiment
Below in conjunction with an embodiment, the reclaiming method of neodymium iron boron material skin provided by the invention is described in detail.
Embodiment
The reclaiming method of the neodymium iron boron material skin of the present embodiment, comprises the following steps:
One, material is boiled: boil material to neodymium iron boron material skin, wipe oil, cull under adopting the temperature condition of process furnace more than 100 DEG C, then the artificial neodymium iron boron material skin to boiling is selected materials, and removes impurity, is naturally dried by neodymium iron boron material skin afterwards;
Two, polishing: adopt nest ox beveler that 70 order wood chips are housed that the neodymium iron boron material skin after drying is carried out polished finish;
Three, sorting: during neodymium iron boron material skin discharging after polished finish, the sawdust blowout adopting air gun will wherein mix under 0.5Mpa air pressure, goes to material skin point constituency afterwards and carries out sorting, and carry out mark to well-graded material skin;
Four, clean: the cleaning agent being 10 by well-graded neodymium iron boron material skin pH value cleans, cleaned up by the residual sawdust dust being attached to neodymium iron boron material epidermis face, discharging afterwards is also dried under the temperature condition of 60 DEG C;
Five, hydrogen tear reason: adopt hydrogen blasting furnace to carry out hydrogen tear reason to clean dried neodymium iron boron material skin: (1) carries out using front inspection to hydrogen blasting furnace, regulate nitrogen, argon pressure at 0.3MPa, vibrating feeder is adopted to feed in raw material to neodymium iron boron material skin afterwards, rotate forward hydrogen blasting furnace body of heater simultaneously, after having fed in raw material, body of heater opening for feed is sealed; (2) carry out negative pressure leakage detection, open mechanical pump after leak detection, lobe pump vacuumizes, as vacuum tightness < 2Pa, start to inhale hydrogen, hydrogen main valve pressure is transferred to 0.5MPa, and suction hydrogen pressure table is transferred to 0.1Mpa, closes hydrogen valve after inhaling hydrogen 40min; (3) suction hydrogen is opened bleed valve after terminating and is vented to normal pressure, then opens mechanical pump and vacuumizes dehydrogenation, starts heating when vacuum tightness reaches 2000Pa, every 20 minutes rotating furnaces 5 minutes, desorption temperature is 550 DEG C, and dehydrogenation time is 4h, after dehydrogenation terminates, cooling discharging.
Claims (1)
1. a reclaiming method for neodymium iron boron material skin, is characterized in that comprising the following steps:
One, material is boiled: boil material to neodymium iron boron material skin, wipe oil, cull under adopting the temperature condition of process furnace more than 100 DEG C, then the artificial neodymium iron boron material skin to boiling is selected materials, and removes impurity, is dried by neodymium iron boron material skin afterwards;
Two, polishing: adopt nest ox beveler that sawdust is housed that the neodymium iron boron material skin after drying is carried out polished finish;
Three, sorting: during neodymium iron boron material skin discharging after polished finish, the sawdust blowout adopting air gun wherein to mix, goes to material skin point constituency afterwards and carries out sorting;
Four, clean: cleaned by well-graded neodymium iron boron material skin cleaning agent, cleaned up by the residual sawdust dust being attached to neodymium iron boron material epidermis face, discharging is afterwards dried;
Five, hydrogen tear reason: adopt hydrogen blasting furnace to carry out hydrogen tear reason to clean dried neodymium iron boron material skin, nitrogen, argon pressure are 0.3 ± 0.05MPa, as vacuum tightness < 2Pa, hydrogen main valve pressure is transferred to 0.5MPa, suction hydrogen pressure table is transferred to 0.1 ± 0.01Mpa, start to inhale hydrogen, after inhaling hydrogen 40min, close hydrogen valve; Open bleed valve after suction hydrogen terminates and be vented to normal pressure, then open mechanical pump and vacuumize dehydrogenation, start heating when vacuum tightness reaches 2000Pa, every 20 minutes rotating furnaces 5 minutes, desorption temperature is 550 DEG C ± 10 DEG C, dehydrogenation time is 1-6h, after dehydrogenation terminates, and cooling discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510503073.7A CN105177296A (en) | 2015-08-17 | 2015-08-17 | Method for recycling and regenerating neodymium iron boron sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510503073.7A CN105177296A (en) | 2015-08-17 | 2015-08-17 | Method for recycling and regenerating neodymium iron boron sheet |
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| Publication Number | Publication Date |
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| CN105177296A true CN105177296A (en) | 2015-12-23 |
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| CN201510503073.7A Pending CN105177296A (en) | 2015-08-17 | 2015-08-17 | Method for recycling and regenerating neodymium iron boron sheet |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211192A (en) * | 2011-06-09 | 2011-10-12 | 天津一阳磁性材料有限责任公司 | Method for preparing high-performance neodymium iron boron by using secondary recycled materials |
| US20130039797A1 (en) * | 2010-04-28 | 2013-02-14 | Wen Jie Yuan | Manufacture of high-performance neodymium iron boron permanent magnet material |
| CN103386412A (en) * | 2013-07-09 | 2013-11-13 | 慈溪市共力磁业有限公司 | Cleaning and recycling technology of neodymium iron boron waste |
| CN103866127A (en) * | 2014-02-27 | 2014-06-18 | 中铝广西有色金源稀土股份有限公司 | Method for preparing neodymium iron boron through regenerating waste material containing neodymium, iron and boron |
| CN104827041A (en) * | 2015-04-23 | 2015-08-12 | 合肥工业大学 | Method and equipment for stripping metal coating from surface of waste neodymium iron boron permanent magnet |
-
2015
- 2015-08-17 CN CN201510503073.7A patent/CN105177296A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130039797A1 (en) * | 2010-04-28 | 2013-02-14 | Wen Jie Yuan | Manufacture of high-performance neodymium iron boron permanent magnet material |
| CN102211192A (en) * | 2011-06-09 | 2011-10-12 | 天津一阳磁性材料有限责任公司 | Method for preparing high-performance neodymium iron boron by using secondary recycled materials |
| CN103386412A (en) * | 2013-07-09 | 2013-11-13 | 慈溪市共力磁业有限公司 | Cleaning and recycling technology of neodymium iron boron waste |
| CN103866127A (en) * | 2014-02-27 | 2014-06-18 | 中铝广西有色金源稀土股份有限公司 | Method for preparing neodymium iron boron through regenerating waste material containing neodymium, iron and boron |
| CN104827041A (en) * | 2015-04-23 | 2015-08-12 | 合肥工业大学 | Method and equipment for stripping metal coating from surface of waste neodymium iron boron permanent magnet |
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Application publication date: 20151223 |
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