CN107298458A - A kind of utilization acid solution is with extractant to separate the retracting device of neodymium iron boron waste material middle rare earth - Google Patents
A kind of utilization acid solution is with extractant to separate the retracting device of neodymium iron boron waste material middle rare earth Download PDFInfo
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- CN107298458A CN107298458A CN201710636487.6A CN201710636487A CN107298458A CN 107298458 A CN107298458 A CN 107298458A CN 201710636487 A CN201710636487 A CN 201710636487A CN 107298458 A CN107298458 A CN 107298458A
- Authority
- CN
- China
- Prior art keywords
- extractant
- rare earth
- waste material
- iron boron
- neodymium iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 39
- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 34
- 239000002699 waste material Substances 0.000 title claims abstract description 31
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 29
- 239000002253 acid Substances 0.000 title claims abstract description 23
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000003647 oxidation Effects 0.000 claims abstract description 17
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 30
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 8
- 239000012074 organic phase Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
- 239000003350 kerosene Substances 0.000 claims description 4
- 244000248349 Citrus limon Species 0.000 claims description 3
- 235000005979 Citrus limon Nutrition 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 238000002386 leaching Methods 0.000 abstract description 3
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- -1 wherein Chemical compound 0.000 description 8
- 239000010941 cobalt Substances 0.000 description 6
- 229910017052 cobalt Inorganic materials 0.000 description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 6
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910021446 cobalt carbonate Inorganic materials 0.000 description 1
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G51/00—Compounds of cobalt
- C01G51/06—Carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention is related to rare earth metallurgy technology, more particularly to a kind of utilization acid solution with extractant to separate the retracting device of neodymium iron boron waste material middle rare earth.The invention is added to neodymium iron boron waste material using air oxidation device and air oxidation pretreatment is carried out after hydrochloric acid, portion of metallic iron powder is allowed to be converted into frerrous chloride, it is reoxidised into the di-iron trioxide for being insoluble in hydrochloric acid, then the rare earth element in neodymium iron boron waste material is made preferentially to leach using sour decomposer, and suppress the leaching of iron, make ferro element is most of in sour decomposable process to be separated with scum form, substantially increase the purity of product.
Description
Technical field
The invention is related to rare earth metallurgy technology, more particularly to a kind of useless to separate neodymium iron boron with extractant using acid solution
Expect the retracting device of middle rare earth.
Background technology
Nd-Fe-B permanent magnet material have magnetic it is high, using it is wide, develop fast the features such as.Neodymium iron boron magnetic body has high remanent magnetism, height
The characteristics such as coercivity, high energy product, thus it is widely used in electronics, communication, Medical Devices, space flight and aviation, auto industry and work
The fields such as industry automation.In recent years, China's sintered NdFeB yield accounts for the whole world with the speed rapid growth of annual 15% or so
50% or so of total output.In recent years, mandatory plan is carried out in exploitation of the country to rare earth resources, carries out protective development, and
The growth of global neodymium iron boron still will remain in 30% or so.Using neodymium iron boron waste material recovering rare earth oxide elements, compared to from
Ore produces rare-earth products, and substantially, process shortens superiority, cost is reduced, " three wastes " are reduced, and is effectively protected country
Rare earth resources.Due to there is the requirement of processing technology among the process of manufacture of permanent-magnet material, can produce substantial amounts of leftover pieces or
Waste material is ground on side, and after these device products are scrapped, high value element therein is still present among these scraps.
The content of the invention
The purpose of the invention is to provide one kind and aoxidized using acid solution with extractant with separating neodymium iron boron waste material middle rare earth
The retracting device of thing, it can improve reclaimed rare earth oxide purity.
The invention provides a kind of utilization acid solution with extractant to separate the recovery of neodymium iron boron waste material middle rare earth
Device, including：
Air oxidation device, it is provided with hydrochloric acid upstream end and neodymium iron boron waste material upstream end；
The lapping device of air oxidation device output end is connected, the raw material obtained by its air oxidation device is crushed；
The sour decomposer of lapping device output end is connected, it includes reaction pot and filter, and reaction pot is lapping device
The raw material of output carries out sour decomposition, and the raw material after filter is decomposed to acid is filtered to obtain rare earth feed liquid and filter residue；
The water washing pan of the sour decomposer output end of connection, it is washed to above-mentioned filter residue, and is filtrated to get scum；
Back extraction system for carrying out extraction and recovery to rare earth feed liquid, it includes extraction tank；
The output end of extraction tank is connected with settler, filter and calcination retracting device in turn.
Wherein, it is connected with reservoir between sour decomposer and back extraction system.
Wherein, the inside of reservoir is provided with the first agitator for stirring.
Wherein, reservoir includes concentrated hydrochloric acid upstream end and pump circulation device.
Wherein, back extraction system also includes extractant groove and extraction liquid bath, the delivery port of extractant groove and going out for extraction liquid bath
The mouth of a river is all connected to the water inlet of extraction tank.
Wherein, extraction tank also includes raffinate outlet and extraction tank organic phase outlet, and raffinate outlet is connected with raffinate
Groove, extraction tank organic phase outlet connection settler.
Wherein, extractant groove is provided with extractant pipe and kerosene pipe.
Wherein, the inside of extractant groove is provided with the second agitator for stirring.
Wherein, re chloride pipe of the extraction liquid bath provided with lemon acid tube and connection reservoir output end.
Wherein, the inside of extraction liquid bath is provided with the 3rd agitator for stirring.
The beneficial effect of the invention：The invention is added after hydrochloric acid using air oxidation device to neodymium iron boron waste material
Air oxidation pretreatment is carried out, allows portion of metallic iron powder to be converted into frerrous chloride, is reoxidised into three oxygen for being insoluble in hydrochloric acid
Change two iron, then the rare earth element in neodymium iron boron waste material is preferentially leached using sour decomposer, and suppress the leaching of iron, make iron
Element is most of in sour decomposable process to be separated with scum form, substantially increases the purity of product.
Brief description of the drawings
The invention is described further using accompanying drawing, but the embodiment in accompanying drawing is not constituted to the invention
Any limitation, on the premise of not paying creative work, can also be according to following attached for one of ordinary skill in the art
Figure obtains other accompanying drawings.
Fig. 1 is the retracting device structural representation of the invention.
Include in Fig. 1：1 --- air oxidation device, 11 --- hydrochloric acid upstream end, 12 --- neodymium iron boron waste material entrance
End, 2 --- lapping device, 3 --- sour decomposer, 4 --- water washing pan, 5 --- reservoir, 51 --- first agitator,
52 --- concentrated hydrochloric acid upstream end, 6 --- back extraction systems, 61 --- extractant groove, 611 --- extractant pipe, 612 --- kerosene
Pipe, 613 --- the second agitator, 62 --- extraction liquid bath, 621 --- re chloride pipe, 622 --- lemon acid tubes,
623 --- the 3rd agitator, 63 --- extraction tank, 631 --- extraction tank organic phase outlet, 632 --- raffinate outlet,
64 --- raffinate liquid bath, 7 --- settler, 8 --- filter, 9 --- calcination retracting device.
Embodiment
The invention is further described with the following Examples.
As shown in figure 1, air oxidation device 1 is provided with hydrochloric acid upstream end 11 and neodymium iron boron waste material upstream end 12, air oxidation
The output end of device 1 connects the input of lapping device 2, and the output end of lapping device 2 is connected with sour decomposer 3, and it includes
Reaction pot and filter (being not drawn into Fig. 1), the output end of sour decomposer 3 are connected with water washing pan 4, sour decomposer 3 it is another
One output end is connected with reservoir, and the inside of reservoir 5 is provided with the first agitator 51 and pump circulation device (being not drawn into Fig. 1), storage
Liquid device 5 is additionally provided with concentrated hydrochloric acid upstream end 52.The output end of reservoir 5 is connected in back extraction system 6 by re chloride pipe 621
Extraction liquid bath 62；Back extraction system 6 also includes extractant groove 61, the delivery port of extractant groove 61 and the delivery port of extraction liquid bath 62
It is all connected to the water inlet of extraction tank 63；Extraction tank 63 also includes raffinate outlet 632 and extraction tank organic phase outlet 631, extraction
Extraction raffinate outlet 632 is connected with raffinate liquid bath 64, the connection settler 7 of extraction tank organic phase outlet 631；Extractant groove 61 is provided with the
Two agitators 613, extractant groove 62 is provided with the 3rd agitator 623.The output end of settler 7 is sequentially connected the He of filter 8
Burn and pour retracting device 9.
Operation principle：Neodymium iron boron waste material is put into air inlet oxidation unit 1 from neodymium iron boron waste material end, and entered in hydrochloric acid
End adds hydrochloric acid, wherein, neodymium iron boron waste material and hydrochloric acid add 1.0-2.5M/ by weight the ratio dispensing for being 1: 0.06-0.18
L hydrochloric acid is stirred, and mixture tiling is thick for 20-25Cm, and thing to be mixed is turned over when air-drying to a certain extent and taken off once.Air
Mixture in oxidation unit 1 is transported to lapping device 2 and be crushed to granularity for 150 mesh.The output end output of lapping device 2
Raw material after crushing toward adding water of sizing mixing in reaction pot, then is delayed by raw material and water by weight for 1: 1.5 to sour decomposer 3
It is slow to add concentrated hydrochloric acid, PH1.0-2.5 is adjusted, 80-95 degree is heated, hydrochloric acid is added to PH1.0-2.5, is incubated 2 hours, add sodium chlorate
With the oxidant such as sodium hydroxide, PH3.5 is adjusted back, sour molten time 10-12 hours, rare earth feed liquid and filter residue are obtained through pass filter press filtration.
Filter residue is delivered to water washing pan 4 by sour decomposer 3, and it is washed to filter residue, and is filtrated to get scum.In order that rare earth feed liquid can
To react more abundant, another output end connection reservoir of sour decomposer 3.The output end of reservoir 5 is molten by rare earth chloride
Extraction liquid bath 62 in the connection back extraction of liquid pipe 621 system 6；Extractant (i.e. P507Extraction system) and kerosene be injected into extractant
Groove 61, and stirred by the second agitator 613 extractant is made；In addition, rare earth feed liquid and citric acid are injected into extraction
Liquid bath 62, and stirred by the 3rd agitator 623 extract is made；Then extractant and extract are injected into extraction tank
63, the packet and separation of rare earth oxide and cobalt in rare earth feed liquid obtain single rare earth chloride feed liquid, the single rare earth chlorine
Compound feed liquid is transported to settler 7, and adds sodium bicarbonate solution, carbonated rare earth salt and cobalt pregnant solution is obtained, then carbon
Acid rare earth salt adds industrial water wash 4-5 hours in filter 8, and vacuum filtration is dry to obtain high-purity rare-earth carbonate；Finally
High-purity rare-earth carbonate is put into burn and pours retracting device 9 with 950 degree progress calcinations 3 hours, single rare earth oxide is obtained；Upper
The cobalt pregnant solution stated enters cobalt defiber, obtains cobalt feed liquid and copper segregation liquid, and cobalt feed liquid is obtained high-purity cobalt carbonate through precipitation.
The invention is added to neodymium iron boron waste material using air oxidation device and air oxidation pretreatment is carried out after hydrochloric acid, is allowed
Portion of metallic iron powder is converted into frerrous chloride, is reoxidised into the di-iron trioxide for being insoluble in hydrochloric acid, then utilizes acid decomposition
Device makes the rare earth element in neodymium iron boron waste material preferentially leach, and suppresses the leaching of iron, makes ferro element big in sour decomposable process
Part is separated with scum form, substantially increases the purity of product.
Finally it should be noted that above example is only to the technical scheme for illustrating the invention, rather than to this hair
It is bright create protection domain limitation, although being explained with reference to preferred embodiment to the invention, this area it is general
Lead to it will be appreciated by the skilled person that can be modified to the technical scheme of the invention or equivalent substitution, without departing from this
The spirit and scope of innovation and creation technical scheme.
Claims (10)
1. a kind of utilization acid solution is with extractant to separate the retracting device of neodymium iron boron waste material middle rare earth, it is characterised in that
Including：
Air oxidation device, it is provided with hydrochloric acid upstream end and neodymium iron boron waste material upstream end；
The lapping device of air oxidation device output end is connected, the raw material obtained by its air oxidation device is crushed；
The sour decomposer of lapping device output end is connected, it includes reaction pot and filter, and reaction pot exports lapping device
Raw material carry out sour decomposition, the raw material after filter is decomposed to acid is filtered to obtain rare earth feed liquid and filter residue；
The water washing pan of the sour decomposer output end of connection, it is washed to above-mentioned filter residue, and is filtrated to get scum；
Back extraction system for carrying out extraction and recovery to rare earth feed liquid, it includes extraction tank；
The output end of extraction tank is connected with settler, filter and calcination retracting device in turn.
2. a kind of utilization acid solution according to claim 1 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that be connected with reservoir between sour decomposer and back extraction system.
3. a kind of utilization acid solution according to claim 2 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that the inside of reservoir is provided with the first agitator for stirring.
4. a kind of utilization acid solution according to claim 3 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that reservoir includes concentrated hydrochloric acid upstream end and pump circulation device.
5. a kind of utilization acid solution according to claim 1 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that back extraction system also includes extractant groove and extraction liquid bath, the delivery port and extraction liquid bath of extractant groove
Delivery port be all connected to the water inlet of extraction tank.
6. a kind of utilization acid solution according to claim 5 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that extraction tank also includes raffinate outlet and extraction tank organic phase outlet, raffinate outlet is connected with extraction
Drain tank, extraction tank organic phase outlet connection settler.
7. a kind of utilization acid solution according to claim 5 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that extractant groove is provided with extractant pipe and kerosene pipe.
8. a kind of utilization acid solution according to claim 7 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that the inside of extractant groove is provided with the second agitator for stirring.
9. a kind of utilization acid solution according to claim 5 with extractant with separate neodymium iron boron waste material middle rare earth return
Receiving apparatus, it is characterised in that re chloride pipe of the extraction liquid bath provided with lemon acid tube and connection reservoir output end.
10. one kind according to claim 6 or 9 utilizes acid solution with extractant to separate neodymium iron boron waste material middle rare earth
Retracting device, it is characterised in that extraction liquid bath inside be provided with for stir the 3rd agitator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710636487.6A CN107298458A (en) | 2017-07-31 | 2017-07-31 | A kind of utilization acid solution is with extractant to separate the retracting device of neodymium iron boron waste material middle rare earth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710636487.6A CN107298458A (en) | 2017-07-31 | 2017-07-31 | A kind of utilization acid solution is with extractant to separate the retracting device of neodymium iron boron waste material middle rare earth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107298458A true CN107298458A (en) | 2017-10-27 |
Family
ID=60133313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710636487.6A Pending CN107298458A (en) | 2017-07-31 | 2017-07-31 | A kind of utilization acid solution is with extractant to separate the retracting device of neodymium iron boron waste material middle rare earth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107298458A (en) |
Cited By (4)
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| CN108004411A (en) * | 2017-12-28 | 2018-05-08 | 长春工程学院 | A kind of apparatus and method of neodymium iron boron greasy filth waste material room temperature wet method air, ozone secondary oxidation iron removaling and organic matter |
| CN110306071A (en) * | 2018-07-26 | 2019-10-08 | 安徽金三隆再生资源有限公司 | A kind of method for extraction and purification of dysprosia |
| CN110306055A (en) * | 2018-07-26 | 2019-10-08 | 安徽金三隆再生资源有限公司 | A kind of neodymium iron boron waste material removal of impurities extraction equipment |
| CN113118117A (en) * | 2021-04-01 | 2021-07-16 | 赣州市恒源科技股份有限公司 | Separation and recovery device for neodymium iron boron waste treatment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004411A (en) * | 2017-12-28 | 2018-05-08 | 长春工程学院 | A kind of apparatus and method of neodymium iron boron greasy filth waste material room temperature wet method air, ozone secondary oxidation iron removaling and organic matter |
| CN110306071A (en) * | 2018-07-26 | 2019-10-08 | 安徽金三隆再生资源有限公司 | A kind of method for extraction and purification of dysprosia |
| CN110306055A (en) * | 2018-07-26 | 2019-10-08 | 安徽金三隆再生资源有限公司 | A kind of neodymium iron boron waste material removal of impurities extraction equipment |
| CN110306055B (en) * | 2018-07-26 | 2021-03-23 | 安徽金三隆再生资源有限公司 | Neodymium iron boron waste material edulcoration extraction device |
| CN113118117A (en) * | 2021-04-01 | 2021-07-16 | 赣州市恒源科技股份有限公司 | Separation and recovery device for neodymium iron boron waste treatment |
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