CN106119523A - A kind of efficiently self-heating autoxidation roasting neodymium iron boron waste material technology - Google Patents
A kind of efficiently self-heating autoxidation roasting neodymium iron boron waste material technology Download PDFInfo
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- CN106119523A CN106119523A CN201610595739.0A CN201610595739A CN106119523A CN 106119523 A CN106119523 A CN 106119523A CN 201610595739 A CN201610595739 A CN 201610595739A CN 106119523 A CN106119523 A CN 106119523A
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- cellar
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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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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- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
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Abstract
The present invention relates to rare earth waste and reclaim extractive technique field, a kind of efficiently self-heating autoxidation roasting neodymium iron boron waste material technology is provided, neodymium iron boron waste material is divided into greasy filth material, water abrasive material, line cutting material, slag and material skin five class waste material, use special proportioning, carry out oxidizing roasting by self producing heat burning；Described proportioning is: greasy filth material 27～33%, water abrasive material 10～14%, line cutting material 16～20%, slag 24～30%, material skin 11～15%.The oxygenation efficiency of this Technology rare earth oxide up to 98.6%, Fe2O3Conversion ratio is up to 99.1%, compared with other Technology, all improves 5～8%.
Description
Technical field
The present invention relates to rare earth waste and reclaim extractive technique field, the method particularly relating to neodymium iron boron waste material oxidizing roasting.
Background technology
Nd-Fe-B permanent magnet material has the features such as magnetic is high, application is wide, development is fast.Neodymium iron boron magnetic body has high remanent magnetism, height
The characteristic such as coercivity, high energy product, thus it is widely used in electronics, communication, armarium, space flight and aviation, auto industry and work
The fields such as industry automatization.In recent years, China's sintered NdFeB yield quickly increases with the speed of annual about 15%, accounts for the whole world
About the 50% of total output.Rare earth belongs to national strategy resource.In recent years, the exploitation of rare earth resources is carried out mandatory meter by country
Draw, carry out protective development, and the growth of whole world neodymium iron boron still will remain in about 30%.The oxidation matter-element such as praseodymium, neodymium, dysprosium, terbium
Supply falls short of demand for element.Utilizing neodymium iron boron waste material recovering rare earth oxide elements, produce rare-earth products compared to from Ore, superiority is bright
Aobvious, operation shortens, cost reduces, " three wastes " reduce, and is effectively protected the rare earth resources of country.
Owing to there being the requirement of processing technique in the middle of the process of manufacture of permanent magnet material, substantial amounts of leftover pieces or limit can be produced
Mill waste material.And after these device products are scrapped, high value element therein is still present in the middle of these scrap.Every year
Can recycle but not have the regenerated resources recycled to be worth and reach 35,000,000,000 dollars to 40,000,000,000 dollars.This group numerical monitor goes out
China's regenerated resources development there is also the huge market space, and development prospect is boundless.Therefore, carry from these waste products
Take separation high value element, not only there is the economic implications of reality, have more important Resources Strategy meaning.And China is
This work has been brought into the strategy of sustainable development.
Nd-Fe-B permanent magnet is the permanent magnet material that current magnetic property is the strongest, cost performance is optimum, is commonly called as " permanent magnetism king ", from
Since nineteen eighty-three comes out, its industry obtains fast development.China has the advantage of rare earth resources and labour force so that the neodymium in the whole world
Ferrum B permanent magnetic material industry center toward China shift, equally, the industry center of China's rare earth permanent-magnetic material also by Zhejiang, Shanxi,
Beijing, Tianjin are toward the ground such as Inner Mongol, the Jiangxi development of rare earth resources ground.Rare earth permanent-magnetic material will produce 20 in process of production
～the waste material of 30%, additionally, annual the most about produce more than 10% scrap rare-earth permanent magnet (being commonly called as magnet steel).Chinese neodymium in 2013
Ferrum boron yield has exceeded 120,000 tons, produces neodymium iron boron secondary resource more than 30,000 ton, has huge value of exploiting and utilizing.Meanwhile, rare earth
The immense pressure that environment is produced by useless solid resource, causes the great attention of country, has in succession put into effect that " large industrial solid wastes are comprehensive
Close utilize " 12 " planning ", " State Council about promote rare-earth trade sustainable and healthy development some suggestions " etc. policy and row
Politics and law are advised, and firmly eliminate the backward production facilities, strict emission standards, encourage to recycle dilute expensive useless solid resources such as rare earth.Weight
Depending on the research and development of rare earth metal recovery and utilization technology, set up respective cycle economic system as early as possible, it is achieved low energy consumption, oligosaprobic saving
Type mode of economic development tool is of great significance.
Summary of the invention
For above-mentioned technical problem, the open a kind of efficiently self-heating autoxidation roasting neodymium iron boron waste material technology of the present invention.
The technical problem of the present invention is mainly addressed by following technical proposals:
Neodymium iron boron waste material typically has the polytype structures such as greasy filth material, water abrasive material, line cutting material, slag and material skin, according to
The characters and appearances of each waste material and chemico-physical properties thereof, through repeatedly lab scale and pilot scale, develop a kind of mature and stable
Formula, carries out oxidizing roasting by self producing heat burning.
Neodymium iron boron waste material is divided into greasy filth material, water abrasive material, line cutting material, slag and material skin five class waste material, uses special joining
Ratio, carries out oxidizing roasting by self producing heat burning；Described proportioning is: greasy filth material 27～33%, water abrasive material 10～14%,
Line cutting material 16～20%, slag 24～30%, material skin 11～15%；
Oxidizing roasting step is as follows:
According to said ratio, the neodymium iron boron waste material matched is put in mixing equipment, add clear water and flush to charge level, with 5
Revolutions per second uniform velocity stir 10～15 minutes, after mix homogeneously add oxidizing roasting rotate cellar for storing things stove；
Add the neodymium iron boron waste material of mix homogeneously at cellar for storing things head, and disposable ignition aoxidizes, start cellar for storing things stove and rotate
Device, controls the speed at 1.2 revs/min, controls Flow of Goods and Materials speed and reaches 1:6～1:10 with ventilation speed ratio, passes through power
Learning principle makes material from the tail outlet of automatic stream cellar for storing things, head input port, cellar for storing things, carries out automatic stirring simultaneously and increases oxidation specific surface area, real
Existing neodymium iron boron waste material exhaustive oxidation, is converted into oxide by rare earth, and ferrum is converted into Fe2O3, complete the oxidation roasting of neodymium iron boron waste material
Burn.
Further, the described cellar for storing things stove that rotates is long 15 meters, the rotation cellar for storing things stove of diameter 1.2 meters, arranges cooling at cellar for storing things head and ventilates
Device, cellar for storing things tail arranges dedusting and waste material classification device, rotates and arrange two driving means in the middle of the stove of cellar for storing things, rotate in the burner hearth of cellar for storing things
With refractory material, material automatic circulation device is set.
The invention has the beneficial effects as follows:
1, this technology is during reclaiming the rare earth element in the middle of neodymium iron boron waste material, solves general enterprises and can only process list
Plant waste material, it is impossible to process the technical barrier of multiple mixed type waste material simultaneously.
2, the heat that the rotation cellar for storing things stove of design is produced by neodymium iron boron waste material self-characteristic carries out spontaneous combustion oxidation, outside can saving
Refuelling energy resources.
3, install chiller additional at rotation cellar for storing things head, reduce cellar for storing things head processing temperature by water circulation, improve workman's working environment,
The gas heat energy of collection is converted to hydro-thermal can input to dissolution process simultaneously, steam usage amount can be saved.
4, the oxygenation efficiency of this Technology rare earth oxide is up to 98.6%, Fe2O3Conversion ratio is up to 99.1%, with other
Technology compares, and all improves 5～8%.
Detailed description of the invention
Below by embodiment, technical scheme is described in further detail.
Neodymium iron boron waste material typically has the polytype structures such as greasy filth material, water abrasive material, line cutting material, slag and material skin, according to
The characters and appearances of each waste material and chemico-physical properties thereof, through repeatedly lab scale and pilot scale, develop a kind of mature and stable
Formula, carries out oxidizing roasting by self producing heat burning.
Embodiment 1:
Neodymium iron boron waste material is divided into greasy filth material, water abrasive material, line cutting material, slag and material skin five class waste material, uses special joining
Ratio, carries out oxidizing roasting by self producing heat burning；Described proportioning is: greasy filth material 30%, water abrasive material 12%, line cutting material
18%, slag 27%, material skin 13%；
Oxidizing roasting step is as follows:
According to said ratio, the neodymium iron boron waste material matched is put in mixing equipment, add clear water and flush to charge level, with 5
Revolutions per second uniform velocity stir 10～15 minutes, after mix homogeneously add oxidizing roasting rotate cellar for storing things stove；
Add the neodymium iron boron waste material of mix homogeneously at cellar for storing things head, and disposable ignition aoxidizes, start cellar for storing things stove and rotate
Device, controls the speed at 1.2 revs/min, controls Flow of Goods and Materials speed and reaches 1:8 with ventilation speed ratio, passes through mechanics principle
Make material from the tail outlet of automatic stream cellar for storing things, head input port, cellar for storing things, carry out automatic stirring simultaneously and increase oxidation specific surface area, it is achieved neodymium ferrum
Boron waste material exhaustive oxidation, is converted into oxide by rare earth, and ferrum is converted into Fe2O3, complete the oxidizing roasting of neodymium iron boron waste material.
In the present embodiment, the described cellar for storing things stove that rotates is long 15 meters, the rotation cellar for storing things stove of diameter 1.2 meters, cellar for storing things head arrange cooling and
Ventilation unit, cellar for storing things tail arranges dedusting and waste material classification device, rotates and arrange two driving means in the middle of the stove of cellar for storing things, rotate cellar for storing things stove
The interior refractory material of thorax arranges material automatic circulation device.
Embodiment 2:
Use rotary kiln same as in Example 1.
Proportioning is: greasy filth material 27%, water abrasive material 12%, line cutting material 16%, slag 30%, material skin 15%；According to above-mentioned
The neodymium iron boron waste material matched is put in mixing equipment by proportioning, adds clear water and flushes to charge level, stirs with the uniform velocity of 5 revolutions per seconds
10～15 minutes, add oxidizing roasting after mix homogeneously and rotate cellar for storing things stove；
Add the neodymium iron boron waste material of mix homogeneously at cellar for storing things head, and disposable ignition aoxidizes, start cellar for storing things stove and rotate
Device, controls the speed at 1.2 revs/min, controls Flow of Goods and Materials speed and reaches 1:6 with ventilation speed ratio, passes through mechanics principle
Make material from the tail outlet of automatic stream cellar for storing things, head input port, cellar for storing things, carry out automatic stirring simultaneously and increase oxidation specific surface area, it is achieved neodymium ferrum
Boron waste material exhaustive oxidation, is converted into oxide by rare earth, and ferrum is converted into Fe2O3, complete the oxidizing roasting of neodymium iron boron waste material.
Embodiment 3:
Use rotary kiln same as in Example 1.
Proportioning is: greasy filth material 33%, water abrasive material 10%, line cutting material 20%, slag 25%, material skin 12%；According to above-mentioned
The neodymium iron boron waste material matched is put in mixing equipment by proportioning, adds clear water and flushes to charge level, stirs with the uniform velocity of 5 revolutions per seconds
10～15 minutes, add oxidizing roasting after mix homogeneously and rotate cellar for storing things stove；
Add the neodymium iron boron waste material of mix homogeneously at cellar for storing things head, and disposable ignition aoxidizes, start cellar for storing things stove and rotate
Device, controls the speed at 1.2 revs/min, controls Flow of Goods and Materials speed and reaches 1:10 with ventilation speed ratio, passes through mechanics principle
Make material from the tail outlet of automatic stream cellar for storing things, head input port, cellar for storing things, carry out automatic stirring simultaneously and increase oxidation specific surface area, it is achieved neodymium ferrum
Boron waste material exhaustive oxidation, is converted into oxide by rare earth, and ferrum is converted into Fe2O3, complete the oxidizing roasting of neodymium iron boron waste material.
The present embodiment is the embodiment of example of the present invention, for those skilled in the art, in the present invention
On the basis of disclosing application process and principle, it is easy to make various types of improvement or deformation, be not limited solely to the present invention
Structure described by above-mentioned detailed description of the invention, the most previously described mode is preferred version, and the most restrictive
Meaning, every according to the present invention made equivalence change with amendment, all in the scope protection domain of claims of the present invention.
Claims (2)
1. an efficient self-heating autoxidation roasting neodymium iron boron waste material technology, it is characterised in that: neodymium iron boron waste material is divided into greasy filth
Material, water abrasive material, line cutting material, slag and material skin five class waste material, use special proportioning, carries out oxygen by self producing heat burning
Change roasting；Described proportioning is: greasy filth material 27～33%, water abrasive material 10～14%, line cutting material 16～20%, slag 24～
30%, material skin 11～15%；
Oxidizing roasting step is as follows:
According to said ratio, the neodymium iron boron waste material matched is put in mixing equipment, add clear water and flush to charge level, with 5 revolutions per seconds
Uniform velocity stir 10～15 minutes, after mix homogeneously add oxidizing roasting rotate cellar for storing things stove；
Add the neodymium iron boron waste material of mix homogeneously at cellar for storing things head, and disposable ignition aoxidize, and starts cellar for storing things stove rotary apparatus,
Control the speed at 1.2 revs/min, control Flow of Goods and Materials speed and reach 1:6～1:10 with ventilation speed ratio, pass through mechanics principle
Make material from the tail outlet of automatic stream cellar for storing things, head input port, cellar for storing things, carry out automatic stirring simultaneously and increase oxidation specific surface area, it is achieved neodymium ferrum
Boron waste material exhaustive oxidation, is converted into oxide by rare earth, and ferrum is converted into Fe2O3, complete the oxidizing roasting of neodymium iron boron waste material.
One the most according to claim 1 efficient self-heating autoxidation roasting neodymium iron boron waste material technology, it is characterised in that: institute
Stating and rotate the rotation cellar for storing things stove that cellar for storing things stove is length 15 meters, diameter 1.2 meters, arrange cooling and ventilation unit at cellar for storing things head, cellar for storing things tail arranges dedusting
And waste material classification device, rotate and in the middle of the stove of cellar for storing things, two driving means are set, rotate cellar for storing things burner hearth interior refractory material and thing is set
Material automatic circulation device.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359791A (en) * | 2017-10-30 | 2018-08-03 | 赣县金鹰稀土实业有限公司 | A kind of hybrid rare earth waste energy-saving roasting method |
| CN109504851A (en) * | 2018-10-22 | 2019-03-22 | 江西理工大学 | A kind of method of neodymium iron boron waste material flash oxygen-enriched air roasting |
| CN109504860A (en) * | 2018-10-22 | 2019-03-22 | 江西理工大学 | A kind of double methods for dodging direct synthetical recovery of neodymium iron boron waste material |
| CN111850290A (en) * | 2020-08-05 | 2020-10-30 | 龙南县堉然科技有限公司 | Rare earth waste airflow mill oxygen-enriched roasting device and use method thereof |
| CN113028406A (en) * | 2021-03-09 | 2021-06-25 | 信丰县包钢新利稀土有限责任公司 | Device and method for efficiently and environmentally separating oil substances in neodymium iron boron waste |
| CN115323164A (en) * | 2022-09-16 | 2022-11-11 | 赣州华卓再生资源回收利用有限公司 | Multistage calcination method for neodymium iron boron waste |
| CN115449627A (en) * | 2022-10-13 | 2022-12-09 | 中国科学院赣江创新研究院 | Method for oxidizing and roasting neodymium iron boron waste |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359791A (en) * | 2017-10-30 | 2018-08-03 | 赣县金鹰稀土实业有限公司 | A kind of hybrid rare earth waste energy-saving roasting method |
| CN109504851A (en) * | 2018-10-22 | 2019-03-22 | 江西理工大学 | A kind of method of neodymium iron boron waste material flash oxygen-enriched air roasting |
| CN109504860A (en) * | 2018-10-22 | 2019-03-22 | 江西理工大学 | A kind of double methods for dodging direct synthetical recovery of neodymium iron boron waste material |
| CN111850290A (en) * | 2020-08-05 | 2020-10-30 | 龙南县堉然科技有限公司 | Rare earth waste airflow mill oxygen-enriched roasting device and use method thereof |
| CN113028406A (en) * | 2021-03-09 | 2021-06-25 | 信丰县包钢新利稀土有限责任公司 | Device and method for efficiently and environmentally separating oil substances in neodymium iron boron waste |
| CN113028406B (en) * | 2021-03-09 | 2023-08-15 | 信丰县包钢新利稀土有限责任公司 | Device and method for efficiently and environmentally-friendly separating oily substances from NdFeB waste |
| CN115323164A (en) * | 2022-09-16 | 2022-11-11 | 赣州华卓再生资源回收利用有限公司 | Multistage calcination method for neodymium iron boron waste |
| CN115323164B (en) * | 2022-09-16 | 2024-02-20 | 赣州华卓再生资源回收利用有限公司 | Multistage calcining method for neodymium iron boron waste |
| CN115449627A (en) * | 2022-10-13 | 2022-12-09 | 中国科学院赣江创新研究院 | Method for oxidizing and roasting neodymium iron boron waste |
| CN115449627B (en) * | 2022-10-13 | 2023-12-12 | 中国科学院赣江创新研究院 | Method for oxidizing roasting neodymium iron boron waste |
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