CN102154553A - Method for removing iron and aluminum by autoxidation of iron-based waste material containing high-value elements - Google Patents
Method for removing iron and aluminum by autoxidation of iron-based waste material containing high-value elements Download PDFInfo
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- CN102154553A CN102154553A CN201110046685XA CN201110046685A CN102154553A CN 102154553 A CN102154553 A CN 102154553A CN 201110046685X A CN201110046685X A CN 201110046685XA CN 201110046685 A CN201110046685 A CN 201110046685A CN 102154553 A CN102154553 A CN 102154553A
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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
- C22B7/006—Wet 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet 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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- 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
Abstract
The invention relates to a method for removing iron and aluminum by the autoxidation of iron-based waste material containing high-value elements. The method is characterized by comprising the following steps of: crushing the iron-based waste material, and mixing the crushed iron-based waste material, water and a small amount of acid to ensure that the iron-based waste material in air is in the humid electrolytic atmosphere, performing a series of complex oxidization reactions and electrochemical reactions, and converting simple substance iron or ferrous iron and simple substance aluminum into trivalent oxides or hydroxides; and performing processes of acid dissolving, impurity removal, filtering and the like on the material oxidized by the air to obtain solution which contains high-value elements and in which the iron and the aluminum are removed, and purifying and separating the solution further to obtain a corresponding product containing the high-value elements. The method has the advantages of short process, simple equipment, energy conservation, little using amount of industrial chemicals, high dissolution rate of the high-value elements, mild reaction condition, environment friendliness, and the like.
Description
Technical field
The present invention relates to a kind of method that contains high value element iron-based waste material natural oxidation deironing aluminium, specifically belong to resource circulation utilization and technical field of wet metallurgy.
Background technology
In order to make more excellent more unique iron-based construction material and functional materials, general method is to add alloy element or alloying alloy in iron.Along with the mass production of iron be extensive use of, caused the iron-based amount of waste material to grow with each passing day inevitably.And in these iron-based waste materials, contain high value scarce resources such as a considerable amount of rare earths, cobalt, nickel, copper.So, from contain high value element iron-based waste material (hereinafter to be referred as waste material or iron-based waste material), reclaim and extract the high value element, realize resource circulation utilization, be the problem that the insider tries to explore to study always, and disclose or delivered many methods.These methods can roughly reduce two big classes: direct smelting process and hydrometallurgical extraction method.
The hydrometallurgical extraction method utilizes chemical means to destroy the ferrous alloy state exactly, removes low value element (as iron, aluminium etc.), and the high value element is separated the process that purification obtains corresponding product.The most key step is exactly how to realize the low value element in these class methods, and especially main body low value elemental iron and high value element separates.Because this step is related to the good and bad, high and low of all many-sides such as yield, quality product, production cost and efficient, the environmental pollution of high value element.The existing method that just contains high value element iron-based waste material deironing extraction below is summarized as follows:
The one, complete molten method: the iron-based waste material is all dissolved with acid and oxygenant, adopt separating of the realization of one of following method and ferro element then: 1. directly add and have optionally that precipitation agent makes the high value element form throw out, thereby realize itself and the separating of a large amount of ferro elements; 2. make ferro element form throw out, realize and the separating of high value element, as ferro element all being oxidized to+3 valency ions and add alkaline matter and form ferric hydroxide precipitate, or add alkaline metal salt make+3 valency iron produce siderotil salt precipitation etc.; 3. make ferro element maintenance+divalent attitude, adopt extraction agent the high value elements by extraction in organic phase.These methods exist following one or more defectives: A, acid consumption big at least, the cost height; The waste water that contains iron ion and spent acid that B, a large amount of needs of formation are handled; C, environmental pollution are serious; D, can not realize separating of high value element and ferro element fully, promptly high value element yield is low; E, the easy oxidation by air of ferrous ion and being extracted continues mixed mutually or the like with the high value element.
The 2nd, high-temperature oxidation: this is the at present industrial method that generally adopts, and this method makes ferrous alloy fully oxidation at high temperature alloy change into oxide compound, these materials is carried out operations such as acid is molten, removal of impurities, purification again and obtains high value element product.These class methods can be by the sour molten condition of control with the preferential stripping of high value element, and ferric oxide lacks stripping as much as possible, thereby has saved sour consumption, has reduced some costs, and a large amount of ferro elements becomes byproduct with the form of scum and sells.This has obviously had significant improvement than complete molten method.But because after the iron-based waste material process high-temperature heating treatment, it is more difficult that the stripping of high value element also becomes, and reach the ideal yield, the high a lot of acid of necessary its theoretical amount of consumption rate; And some high value element such as cobalt, nickel etc. are stripping simultaneously almost, need at high temperature add again reductive agent it is changed into behind cobalt, the nickel matte could stripping; The abundant iron oxide based waste material equipment complexity of high temperature needs to consume big energy and power in addition, causes production cost to increase.
The 3rd, bubbling air oxidation style: ZL97109971.5 " reclaims the method for useful element from the alloy that contains rare-earth-iron " and discloses a kind of method that reclaims useful element from the alloy that contains rare-earth-iron: levigate to median size 5-50 μ m (providing maximum median size among the embodiment is 20 μ m) the rare-earth-iron alloy that contains cobalt, the furnishing slip, the limit adds rare nitric acid, the limit bubbling air, keeping pH is more than 5, controlled temperature is below 50 ℃, do not need to consume too many nitric acid and just can make the dissolving of rare earth and cobalt become nitrate solution, ferro element then is filtered with the form of ironic hydroxide and removes.The defective of this method is: the one, and reaction needed is used nitric acid, and not only cost is higher, and has generation toxic gas NO and NO
2Danger; The 2nd, the reaction times is very long, stirs, ventilates, drips nitric acid, control pH and temperature, and not only power and manpower consumption are big, and the control difficulty is also not little, is unfavorable for large-scale production.
ZL03811515.8 " from the method for rare earth class transition metal alloy waste recovery useful element " discloses a kind of method from rare earth class-transition metal alloy waste recovery useful element: rare earth class-transition metal alloy waste material is immersed in the ammonium salt aqueous solution of mineral acid, keep 40 ℃ to 90 ℃, feeding contains the gas of aerobic, not needing to consume too many mineral acid just can make waste material change into oxide compound or oxyhydroxide, control certain condition again, with the preferential stripping rare earth of acid, the contour value element of cobalt filters the rare earth of the ferro element that just can be removed, the solution of cobalt etc.There is long reaction time equally in this method, and stirring, ventilation, temperature keep, and consume a large amount of power, manpower and energy, and production cost is higher; Also need to consume the ammonium salt of mineral acid in addition.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned existing method, adopt the method for air natural oxidation that the iron-based waste material is changed into oxide compound or oxyhydroxide, simple to realize, efficient, reduce cost, purpose such as environmental friendliness.
Main technical schemes of the present invention may further comprise the steps:
(1) powder process:, make the iron-based waste material become granularity and be-40 purpose powders by milling methods such as machinery or air-flow or suction hydrogen.Reach-40 orders as the waste material granularity, then directly carry out step (2) without step (1).
(2) start reaction: levigated powder and water according to the weight ratio water: waste material=0.5～1.5: 1 ratio mixes in reactor, adds sour by waste material weight with 0.4～1molH+/Kg again and stirs.
(3) air natural oxidation: the material that step (2) is made spreads in acidproof kiver or on the clean non-leakage acid-resistant floor, when being leather hard, material stirs for several times, and the sprinkling moisturizing makes material remain humidity, make iron, ferrous and high value element be changed into corresponding salt and/or oxyhydroxide and/or oxide compound under field conditions (factors), account for below total iron 20wt% until ferrous by the air natural oxidation.
(4) sour dissolved oxygen hydrolysis: stir the material that washings that a following water and/or step (7) obtain and step (3) obtain and drop in the reactor, and be warming up to 70～90 ℃, gradation adds acid and oxygenant, no longer rise to more than 3 to pH, adjust reaction end pH≤2 then, continued insulated and stirred 0.5 to 1 hour, and the no ferrous ion of check.
(5) deironing aluminium: the material insulated and stirred step (4), slowly add alkaline matter, make pH=3.5～4.0, and continue to stir 20 to 40 minutes.
(6) filter: the material filtering of step (5) filtrate of containing the high value element of iron aluminium element that promptly has been removed, this filtrate is further separated purification can obtain corresponding high value element product.
(7) washing: filter residue and water that step (6) is obtained are warming up to 70～90 ℃ of agitator treatings and filtration, and filtrate is returned step (4) and used, and filter residue is a byproduct.
The above " iron-based waste material " is to be main element with iron, adds one or more high value elements at least, as elements such as rare earth, cobalt, nickel, titanium, chromium, lead, bismuth, copper, manganese, zinc, the material of formed alloy state or ferrous state.
Preferred 40～100 orders of the above iron-based waste material granularity.
The above " acid " is hydrochloric acid or sulfuric acid.
The above " alkali " is the oxyhydroxide or the oxide compound of ammoniacal liquor and/or basic metal and/or alkaline-earth metal.
The above " oxygenant " is: oxymuriate or hypochlorite or hydrogen peroxide, and it can become the reaction of+3 valency iron to calculate according to remaining ferrous oxidation in the resulting material of step (3) with reference to consumption, but final consumption must guarantee that remnants are ferrous oxidized fully.
Following chemical reaction and electrochemical reaction take place in starting reaction and air natural oxidation step:
Following chemical reaction directly takes place with acid in the iron-based waste material that at first is metallic state or iron protoxide state:
2M+2nH
+=2M
N++ nH
2↑ (M is iron aluminium and high value element etc., and n is a natural number, down together) (a)
MxOy+H
+→ M
N++ H
2O (x, y are natural number, down together) (b)
Secondly, because the subacidity that adds, the pH value rises to more than 3 very soon, and in malaria, following chemical reaction takes place ferrous ion etc. easily:
4Fe
2++O
2+10H
2O＝4Fe(OH)
3+8H
+ (c)
M
n++n?H
2O＝M(OH)n+2n?H
+ (d)
M(OH)n→MxOy·mH
2O (e)
And (c) formula and (d) hydrogen ion that produces of formula react immediately (a) and (b), as seen need not supplemental acid midway, reaction (a) and (b) and (c) He (d) just carrying out naturally circularly, and part oxyhydroxide (e) formula will take place will react.
In addition, also be accompanied by the generation of following electrochemical reaction at least:
Negative pole M-ne=M
N+(f)
Fe
2+-e＝Fe
3+ (g)
Anodal 2H
++ 2e=H
2↑ (h)
O
2+2H
2O+4e＝4OH
- (i)
Step (4) can need consume sour composition according to high value element in the resulting material of step (3) with sour reference consumption and calculate; High value element soluble salt and a large amount of ferro element be consumption acids no longer.The acid meeting molten in acid and that consume during with oxidant reaction of unoxidized ferrous iron material such as iron protoxide or ferrous hydroxide such as obtains at stoichiometric replenishing in the hydrolysis reaction that+3 valency iron ions are followed, available chemical equation is expressed as follows (oxygenant is example with the sodium chlorate):
FeO+2H
+＝Fe
2++H
2O (j)
6Fe
2++6H
++ClO
3 -＝6Fe
3++Cl
-+3H
2O (k)
Fe
3++3H
2O＝Fe(OH)
3↓+3H
+ (l)
Arrangement merges (j), (k), (l) formula, can be able to following formula (m)
6FeO+9H
2O+ClO
3 -＝6Fe(OH)
3↓+Cl
- (m)
In sum, the present invention has following significant advantage: 1. flow process and equipment are extremely simple, are fit to suitability for industrialized production; 2. save the consumption of power, manpower, energy and chemical feedstocks in a large number, reduce production costs; 3. the high value element leaching rate is apparently higher than high-temperature oxidation; 4. reaction conditions gentleness, a large amount of ferro elements changes into ferric oxide or ironic hydroxide byproduct, and is very friendly to environment.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
What below introduce is specific embodiment as foregoing of the present invention, of particular note, following examples are only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Embodiment one
Referring to Fig. 1.
Get 2000Kg through wet ball-milling to the Nd-Fe-B alloys waste material body refuse of-40 orders (0.425mm) (wherein REO 19.84wt%, Co 0.60wt%, Fe 56.5wt%, Al after testing
2O
31.46wt%, moisture content 22.1%, surplus are other material), drop in the reactor with 1900L water and 10N hydrochloric acid 60L and to mix reaction, afterwards material in the pot is paved in clean non-leakage acidproof shallow hole, stir for several times, and sprinkling moisturizing, make material keep half-dried dampness, be reduced to 5.3wt%, and recording solubility REO, to account for total REO percentage ratio be 8.2wt% until the ferrous percentage ratio that accounts for total iron.
Acid dissolved oxygen hydrolysis: the material input reactor that 3000L water and above-mentioned steps are obtained, and the maintenance temperature is 70～90 ℃, keep stirring, gradation adds hydrochloric acid and 27.5% industrial hydrogen peroxide, no longer rising to pH=3 to solution acidity continues to add small amount of hydrochloric acid when above and transfers to terminal point pH=1～2, add 5N hydrochloric acid 1380L and 100Kg27.5% industry hydrogen peroxide altogether, continue insulated and stirred 0.5 hour after the no ferrous ion of check.
Deironing aluminium: slowly add the about 130L of 3N ammoniacal liquor under the insulated and stirred, regulate acidity, and continue to stir 20 minutes to pH=3.5～4.
Filter:, this filtrate is further separated the product that purification can obtain corresponding rare earth, cobalt element promptly the be removed first-time filtrate that contains rare earth, cobalt element of iron aluminium element of the material filtering that mixes up the pH value.
Washing: will go up the filter residue that step obtains and mix, and remain on 70～90 ℃ after the intensification and stir and washed and filtration in 0.5 hour, and obtain wash filtrate and byproduct filter residue with water.
First-time filtrate and wash filtrate merging obtain 5760 liters of solution that contain rare earth and cobalt, and detected result sees " embodiment one " in the table one for details.
Embodiment two
Referring to Fig. 1.
With the spontaneous combustion in air of the Nd-Fe-B alloys waste material of a collection of greasy filth state just burn iron is transformed into ferrous state after, become-60 order materials through wet ball-milling again.Get this iron-based waste material 2000Kg, after testing wherein REO23.5wt%, Co 0.65wt%, FeO 63.3wt%, Fe
2O
31.47wt%, Al
2O
31.32wt%, water 8.4wt%, surplus is other material, after mixing reaction in 750L water and the 5N hydrochloric acid 360L input reactor, material in the pot is paved on clean non-leakage acid-resistant floor, stir for several times, and spray moisturizing, make material keep half-dried dampness, be reduced to 17.6% until the ferrous percentage ratio that accounts for total iron, and record this moment solubility REO to account for total REO percentage ratio be 12.6%.
The hydrolysis of acid dissolved oxygen: material and 3000L water that above-mentioned steps is obtained drop into reactor, temperature is risen to 70～90 ℃, keep stirring, gradation adds 5N hydrochloric acid 1480L and 65Kg sodium chlorate, insulated and stirred 1 hour is continued after the no ferrous ion of check in pH=1～2 to terminal.
Deironing aluminium: last step material insulated and stirred, slowly add about 20 liters of 3N sodium hydroxide, adjust acidity, and continue to stir 40 minutes to pH3.5～4.0.
Filter:, this aqueous solution is further separated the product that purification promptly obtains elements such as corresponding rare earth, cobalt promptly the be removed aqueous solution that contains rare earth, cobalt element of iron aluminium element of the material filtering that mixes up the pH value.
Washing: stir and to go up the filter residue that step obtains down and mix, keep temperature to be 70～90 ℃ and stir also filtrations of washed twice in 0.5 hour with water.Obtain wash filtrate and byproduct filter residue.
The merging of all filtrates is obtained 6160 liters of solution that contain rare earth and cobalt, and detected result sees " embodiment two " in the table one for details.
Comparative Examples: the industrial high-temperature oxidation that generally adopts
The Nd-Fe-B alloys waste material is pressed high-temperature oxidation with steps of processing:
1, high-temperature oxidation process: the Nd-Fe-B alloys waste material of getting a collection of greasy filth state is through steps of processing: in the air spontaneous combustion just burn, pulverize and cross 100 mesh sieves, in air with 800～850 ℃ of calcinations and cross 100 mesh sieves once more, do Comparative Examples with this iron-based waste material, contain REO 26%, Co 0.81%, FeO 2.16%, Al after testing
2O
31.26%, surplus is Fe
2O
3Deng.
2, the molten and deironing aluminium process of acid:
A, sour molten: stir following above-mentioned material 2000Kg and 3000L water and drop into reactor, keeping temperature is 80 ℃ to 90 ℃, gradation adds 10N hydrochloric acid and the 29Kg sodium chlorate of 1350L, and add the follow-up continuation of insurance temperature of hydrochloric acid and sodium chlorate and stirred 1.5 hours, and the no ferrous ion of check.
B, deironing aluminium: the material insulated and stirred of steps A, slowly add 1400 liters in 3N sodium hydroxide, make pH rise to 3.5～4.0, continue to stir 40 minutes.
C, filtration:, this aqueous solution is further separated the product that purification can obtain elements such as corresponding rare earth, cobalt promptly the be removed aqueous solution that contains rare earth, cobalt element of iron aluminium element of the material filtering of step B.
D, washery slag: the filter residue that step C is obtained mixes with water, is warming up to 80 ℃ and stirs also filtration of washed twice in 1 hour.Filtrate is retained, and filter residue is as by-product sale.
The merging of all filtrates is obtained 7900 liters of solution that contain rare earth and cobalt, and detected result sees " Comparative Examples " in the table one for details.
Embodiment three
Referring to Fig. 1.
The cobalt Rhometal that the nickel metallurgy converter slag obtains through operations such as " electric dilution ", " magnetic separation of cobalt sulfonium ", through jaw crusher, dry type is levigate reaches-100 orders, contain Co 4.8wt%, Ni 16.2wt%, Cu1.12wt%, Fe 73.3wt%, surplus after testing and be other material.
Get above-mentioned material 1500Kg, drop in the reactor with 1200L water and 75Kg98% sulfuric acid and after the hybrid reaction material to be paved in clean non-leakage kiver, stir for several times, and spray moisturizing, make material keep half-dried dampness, account for total iron 7.2wt% until ferrous.
Acid dissolved oxygen hydrolysis: stir the material and the 3000L water that down above-mentioned steps are obtained and drop into reactor, slowly the 5N sulfuric acid of adding 2460L and 180Kg available chlorine are 60% Losantin, keeping temperature is 70～90 ℃, add the follow-up continuation of insurance temperature of sulfuric acid and Losantin and stirred 40 minutes, through the no ferrous ion of check.
Deironing: in the material of last step, slowly add about 38Kg oxygen lime powder, be adjusted to pH3.5～4.0, and continue to stir 40 minutes.
Filter:, this aqueous solution is further separated purification can obtains corresponding cobalt, nickel, copper products can the be removed aqueous solution that contains cobalt, nickel, copper of ferro element of last step material filtering.
Washing: will go up the filter residue that step obtains and mix, and be warming up to 70～90 ℃ and stir also filtration of washed twice in 0.5 hour, and obtain wash filtrate filter residue byproduct with water.
The merging of all filtrates is obtained 6720 liters of solution that contain cobalt, nickel, copper, and detected result sees " embodiment three " in the table one for details.
Table one: embodiment and Comparative Examples contrast table
Illustrate:
1. embodiment one adopts similar neodymium iron boron waste material with embodiment two with Comparative Examples.Can reach a conclusion from comparing result: advantages such as employing the inventive method has valuable element yield height, and the soda acid unit consumption is low.
2. embodiment three adopts and embodiment one, two and the different waste material of Comparative Examples, thereby its soda acid unit consumption does not have comparability.
Claims (6)
1. method that contains high value element iron-based waste material natural oxidation deironing aluminium is characterized in that may further comprise the steps:
(1) powder process: the iron-based waste material is made granularity be-40 purpose powders;
(2) start reaction: levigated powder and water water by weight: waste material=0.5～1.5: 1 mixed is even, presses waste material weight again with 0.4～1molH
+/ Kg adds acid and stirs;
(3) air natural oxidation: the material that step (2) is produced spreads in acidproof kiver or on the clean non-leakage acid-resistant floor, stir several times, and the sprinkling moisturizing makes material remain humidity, make iron, ferrous and high value element be changed into corresponding salt or oxyhydroxide or oxide compound under field conditions (factors), account for below total iron 20wt% until ferrous by the air natural oxidation;
(4) sour dissolved oxygen hydrolysis: stir the material that slag washing water that a following water and/or step (7) obtain and step (3) obtain and drop in the reactor, and be warming up to 70～90 ℃, gradation adds acid and oxygenant, keep reaction end pH≤2, continued insulated and stirred 0.5 to 1 hour, and the no ferrous ion of check;
(5) deironing aluminium: the material insulated and stirred step (4), slowly add alkaline matter, make pH=3.5～4.0, and continue to stir 20 to 40 minutes;
(6) filter: the material filtering of step (5) filtrate of containing the high value element of iron aluminium element that promptly has been removed, this filtrate is further separated purification can obtain corresponding high value element product;
(7) washing: filter residue and water that step (6) is obtained are warming up to 70～90 ℃ of agitator treatings and filtration, and filtrate is returned step (4) and used, and filter residue is a byproduct.
2. the method for iron-based waste material natural oxidation deironing aluminium according to claim 1, it is characterized in that described iron-based waste material is is main element with iron, the material of at least a formed alloy state or ferrous state in interpolation high value element rare earth, cobalt, nickel, titanium, chromium, lead, bismuth, copper, manganese, the zinc.
3. the method for iron-based waste material natural oxidation deironing aluminium according to claim 1 is characterized in that preferred 40～100 orders of described iron-based waste material granularity.
4. the method for iron-based waste material natural oxidation deironing aluminium according to claim 1 is characterized in that described acid is hydrochloric acid or sulfuric acid.
5. the method for iron-based waste material natural oxidation deironing aluminium according to claim 1 is characterized in that described alkali is the oxyhydroxide or the oxide compound of ammoniacal liquor and/or basic metal and/or alkaline-earth metal.
6. the method for iron-based waste material natural oxidation deironing aluminium according to claim 1 is characterized in that described oxygenant is oxymuriate or hypochlorite and/or hydrogen peroxide.
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| CN201110046685XA CN102154553B (en) | 2011-02-26 | 2011-02-26 | Method for removing iron and aluminum by autoxidation of iron-based waste material containing high-value elements |
| PCT/CN2012/000090 WO2012113263A1 (en) | 2011-02-26 | 2012-01-18 | Method for removing iron and aluminum from iron-based waste material containing high-value elements through natural oxidation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012113263A1 (en) * | 2011-02-26 | 2012-08-30 | 赣州力赛科新技术有限公司 | Method for removing iron and aluminum from iron-based waste material containing high-value elements through natural oxidation |
| CN104232905A (en) * | 2014-06-16 | 2014-12-24 | 赣州力赛科新技术有限公司 | High value element-containing and iron hydroxide-based raw material and application thereof |
| CN105087967A (en) * | 2015-08-30 | 2015-11-25 | 常州市鼎日环保科技有限公司 | Device for recycling rare earth elements in neodymium iron boron waste materials |
| CN105132698A (en) * | 2015-09-27 | 2015-12-09 | 常州市奥普泰科光电有限公司 | Technology for extracting aluminum and zinc from high-aluminum zinciferous aluminum-zinc residues |
| CN106244802A (en) * | 2016-08-31 | 2016-12-21 | 中信大锰矿业有限责任公司 | A kind of method that manganese in electrolytic manganese residues reclaims |
| CN112843582A (en) * | 2021-01-21 | 2021-05-28 | 元素贵稀吉林省环境科技有限公司 | Method for recycling iron-containing and aluminum-containing hazardous wastes with energy conservation |
| CN113444874A (en) * | 2021-05-18 | 2021-09-28 | 广东邦普循环科技有限公司 | Method for safely oxidizing and roasting neodymium iron boron powder and application thereof |
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| WO2015192762A1 (en) * | 2014-06-16 | 2015-12-23 | 赣州力赛科新技术有限公司 | Ferric hydroxide-based raw material containing high value elements, application thereof, and preparation method therefor |
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| CN105087967A (en) * | 2015-08-30 | 2015-11-25 | 常州市鼎日环保科技有限公司 | Device for recycling rare earth elements in neodymium iron boron waste materials |
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| CN106244802A (en) * | 2016-08-31 | 2016-12-21 | 中信大锰矿业有限责任公司 | A kind of method that manganese in electrolytic manganese residues reclaims |
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| GB2618503A (en) * | 2021-05-18 | 2023-11-08 | Guangdong Brunp Recycling Technology Co Ltd | Method for safely oxidizing and roasting neodymium-iron-boron powder and application thereof |
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| Publication number | Publication date |
|---|---|
| CN102154553B (en) | 2012-05-30 |
| WO2012113263A1 (en) | 2012-08-30 |
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