CN104828876A - Method for producing ferroferric oxide by using iron scale - Google Patents
Method for producing ferroferric oxide by using iron scale Download PDFInfo
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- CN104828876A CN104828876A CN201510272233.1A CN201510272233A CN104828876A CN 104828876 A CN104828876 A CN 104828876A CN 201510272233 A CN201510272233 A CN 201510272233A CN 104828876 A CN104828876 A CN 104828876A
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- feso
- ammonia
- solution
- iron scale
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 23
- 239000000047 product Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000010440 gypsum Substances 0.000 claims abstract description 10
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 9
- 239000004571 lime Substances 0.000 claims abstract description 9
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 8
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 8
- 230000001590 oxidative effect Effects 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 229910002588 FeOOH Inorganic materials 0.000 claims abstract description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 6
- 238000001704 evaporation Methods 0.000 claims abstract description 3
- 239000002243 precursor Substances 0.000 claims abstract description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 230000007935 neutral effect Effects 0.000 claims description 7
- 239000001117 sulphuric acid Substances 0.000 claims description 7
- 235000011149 sulphuric acid Nutrition 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 239000006227 byproduct Substances 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000003472 neutralizing effect Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 abstract 1
- 239000012452 mother liquor Substances 0.000 abstract 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000009388 chemical precipitation Methods 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention discloses a method for producing ferroferric oxide by using iron scale. Preparation of FeSO from iron scale4FeSO is fed downwards under the protection of solution and nitrogen4Dropwise adding ammonia water into the solution to precipitate Fe2+Preparing a FeOOH precursor, and controlling the pH value of the end point to be 5.5-8.0. Oxidizing for 1-3 h at 80-100 ℃, and preparing ferroferric oxide by adopting an air induction method. The product is filtered, washed and dried to obtain the superfine uniform Fe with good crystallinity3O4Spherical powder. Neutralizing the filtered ammonium sulfate mother liquor with lime to generate gypsum precipitate and ammonia water solution, filtering, evaporating and concentrating, and returning the ammonia water to FeSO4And (4) a preparation process. The invention has the advantages of simple process, cheap raw materials, ammonia recycling in the system, environmental protection and the like, and is Fe3O4The industrial production of the ultrafine powder provides an effective, feasible and environment-friendly new way.
Description
Technical field
The present invention relates to one iron scale and prepare Fe
3o
4the method that spherical powder and ammonia regeneration recycle.
Background technology
Fe
3o
4superfine powder is good, cheap due to its chemical stability, and the characteristic having magnetic and ultrafine particle concurrently is widely used in a lot of fields.As one more important in mineral dye, be widely used in the fields such as coating, ink, pigment; Ultra-fine Fe in the electronics industry
3o
4magnetic recording material, magnetic fluid, the important component part of gas, liquid sensitive material; In addition, ultra-fine Fe
3o
4also can be used as microwave absorbing material and catalyzer.
Ferroferric oxide magnetic powder is prepared by the method for the physics and chemistries such as chemical precipitation, thermolysis, mechanical mill.Physical has favorable reproducibility, advantage simple to operate, but the production cycle is long, and cost is higher, and particle refinement is difficult to reach requirement.Fe prepared by chemical precipitation method
3o
4magnetic is epigranular not only, and the parameter such as the size and geometric of magnetic particle diameter, saturation magnetization, coercive force can be controlled by adjusting process condition, can meet the requirement in different application field, be the important method preparing ultra-fine ferroferric oxide magnetic powder.
In recent years, although at Fe
3o
4preparation and modification aspect make significant progress, but still there are two typical problems: raw material prepared by (1) is more expensive, and cost is higher, and preparation technology is relatively complicated; (2) sodium hydroxide is adopted to prepare Fe
3o
4time can produce a large amount of sodium sulfate wastewaters, contaminate environment and waste resource.Therefore, find new reaction process, especially the friendly process of low cost synthesizes the Fe that even particle size distribution is controlled, have good dispersion
3o
4powder has important practical significance.
Iron scale is in heat steel and the operation of rolling, is formed iron oxide layer because surface is oxidized, and peels off the fish scale-shaped thing got off.Iron scale raw material is easy to get, cheap, can be used as the raw material of oxygenant and Magnetite (processed).
Summary of the invention
The object of this invention is to provide that a kind of technique is simple, raw materials cost and production cost low, both solved discharge of wastewater and to have exceeded standard pollution problem, the reprocessing cycle realizing again ammonia uses, energy-conserving and environment-protective, remarkable in economical benefits prepare Fe with iron scale
3o
4spherical powder and ammonia regeneration recycling method.
The object of the present invention is achieved like this.Iron scale produces a method for Z 250, it is characterized in that, comprises the following steps:
(1) sulfuric acid leaching: leach iron scale at normal temperatures with dilute sulphuric acid, obtains FeSO after filtration
4solution;
(2) slurrying: under non-oxidizing gas protection, to the FeSO that step (1) is produced under normal temperature
4ammoniacal liquor is dripped, precipitation Fe in solution
2+preparation δ-FeOOH presoma;
(3) atmospheric oxidation: utilize the oxygen in air as natural oxygenant, δ-FeOOH oxidation of precursor step (2) produced obtains Z 250;
(4) product collection: Z 250 step (3) produced filters, washing post-drying, obtains the ultra-fine even Fe with good crystallinity
3o
4spherical powder.
Settlement-oxidation method prepares Fe
3o
4the principal reaction of magnetic is:
Fe
2++2OH
－→Fe(OH)
2↓ (1)
4Fe(OH)
2+O
2+2H
2O→4Fe(OH)
3↓ (2)
Fe(OH)
2+2Fe(OH)
3→FeO·Fe
2O
3·4H
2O→Fe
3O
4+4H
2O (3)
Further, in order to recycle ammoniacal liquor, acid waste water is avoided to discharge, further comprising the steps of:
(5) ammonia recycle: the ammonium sulfate liquor limestone vegetation that step (3) is separated, generate calcium sulfate and weak ammonia, by product gypsum is obtained after filtration, be separated after gypsum and obtain the weak ammonia that concentration is 2 ~ 7%, weak ammonia is evaporated, concentrated after return step (2) recycle.
Further, in order to improve the reaction effect of step (2), the FeSO of rate-determining steps (1)
4strength of solution is 0.5 ~ 1.5mol/L.
Further, in order to improve the reaction effect of step (2), rate-determining steps (2) ammoniacal liquor drips terminal pH 5.5 ~ 8.0.
Further, described in step (2), non-oxidizing gas is nitrogen, argon gas or helium, preferred nitrogen.
Further, in order to improve the reaction effect of step (3), in step (3), oxidizing temperature is 80 ~ 100 DEG C, and oxidization time is 1 ~ 3h; Stir in oxidising process, mixing speed is 300 ~ 600rpm.
Further, step (5) described lime is white lime Ca (OH)
2or unslaked lime CaO, neutral temperature is not higher than 80 DEG C.
Further, step (5) weak ammonia ammonia still carries out evaporation concentration, and ammonia still control condition is that tower top temperature is not less than 90 DEG C, and column bottom temperature is not less than 95 DEG C.
Fe prepared by the present invention
3o
4powder is spherical, and particle diameter is at 80 ~ 300nm, and saturation magnetization is 60 ~ 100emu/g, and size and saturation magnetization can regulate and control as required in aforementioned range.
Method provided by the invention has the following advantages:
1. cheaper starting materials is easy to get, with low cost.
2. working condition gentleness is controlled, suitability for mass industrialized production.
3. ammonia circulation utilizes, and by product is gypsum, production technique clean environment firendly.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Fig. 2 is Fe prepared by the present invention
3o
4powder SEM picture.
Embodiment
Details are as follows for production method of the present invention:
1. sulfuric acid leaching
Leach iron scale at normal temperatures with dilute sulphuric acid, after filtration, obtain the FeSO that concentration is 0.5 ~ 1.5mol/L
4solution.
2. slurrying
Under non-oxidizing gas protection, (normal temperature) is to FeSO
4ammonia precipitation process Fe is dripped in solution
2+preparation δ-FeOOH presoma, controls terminal pH 5.5 ~ 8.0.
3. atmospheric oxidation
Utilize the oxygen in air as natural oxygenant, at 80 ~ 100 DEG C, be oxidized 1 ~ 3h, control mixing speed is 300 ~ 600rpm.
4. neutralize
With limestone vegetation after the ammonium sulfate analytical concentration of by-product, neutral temperature is not higher than 80 DEG C.Filter to isolate gypsum, obtain weak ammonia.
5. ammonia still process
Distill neutralizing the weak ammonia ammonia still obtained, the strong aqua obtained directly can get back to Fe
3o
4production system, or make ammonia further or liquefied ammonia returns production system.
Following examples are for illustration of the present invention.
Embodiment 1
Dissolve iron scale with dilute sulphuric acid, filter and obtain FeSO
4solution.The FeSO that concentration is 1.0mol/L is added in normal temperature downhill reaction still
4solution 300ml, regulates pH=6.0 with strong aqua under nitrogen protection.When system temperature rises to 90 DEG C, stop passing into nitrogen and passing into air with the speed of 0.8L/min, oxidation 2h.Oxidation terminates rear ageing 2h, is filtered the product that obtains, and washed several times with water final vacuum is dry, can obtain product 21.9g, particle size be 51nm, product S EM photo as shown in Figure 2.Get ammonium sulfate liquor 300ml in the retort of band stirring, slowly add stoichiometric lime, control neutral temperature not higher than 80 DEG C, add rear continuation and stir 5min, filtration obtains by-produced gypsum, and filtrate delivers to ammonia still process, and the strong aqua obtained directly can get back to Fe
3o
4production system.
Embodiment 2
Dissolve iron scale with dilute sulphuric acid, filter and obtain FeSO
4solution.The FeSO that concentration is 1.0mol/L is added in normal temperature downhill reaction still
4solution 300ml, regulates pH=6.5 with strong aqua under nitrogen protection.When system temperature rises to 90 DEG C, stop passing into nitrogen and passing into air with the speed of 1.0L/min, oxidation 1h.Oxidation terminates rear ageing 1h, and filtered by the product obtained, washed several times with water final vacuum is dry, and can obtain product 22.1g, particle size is 53nm.Get ammonium sulfate liquor 300ml in the retort of band stirring, slowly add stoichiometric lime, control neutral temperature not higher than 80 DEG C, add rear continuation and stir 5min, filtration obtains by-produced gypsum, and filtrate delivers to ammonia still process, and the strong aqua obtained directly can get back to Fe
3o
4production system.
Embodiment 3
Dissolve iron scale with dilute sulphuric acid, filter and obtain FeSO
4solution.The FeSO that concentration is 1.5mol/L is added in normal temperature downhill reaction still
4solution 300ml, regulates pH=6.0 with strong aqua under nitrogen protection.When system temperature rises to 90 DEG C, stop passing into nitrogen and passing into air with the speed of 0.8L/min, oxidation 2h.Oxidation terminates rear ageing 2h, and filtered by the product obtained, washed several times with water final vacuum is dry, and can obtain product 33.0g, particle size is 52nm.Get ammonium sulfate liquor 300ml in the retort of band stirring, slowly add stoichiometric lime, control neutral temperature not higher than 80 DEG C, add rear continuation and stir 10min, filtration obtains by-produced gypsum, and filtrate delivers to ammonia still process, and the strong aqua obtained directly can get back to Fe
3o
4production system.
Embodiment 4
Dissolve iron scale with dilute sulphuric acid, filter and obtain FeSO
4solution.The FeSO that concentration is 1.5mol/L is added in normal temperature downhill reaction still
4solution 300ml, regulates pH=8.0 with strong aqua under nitrogen protection.When system temperature rises to 90 DEG C, stop passing into nitrogen and passing into air with the speed of 1.0L/min, oxidation 3h.Oxidation terminates rear ageing 4h, and filtered by the product obtained, washed several times with water final vacuum is dry, and can obtain product 33.6g, particle size is 59nm.Get ammonium sulfate liquor 300ml in the retort of band stirring, slowly add stoichiometric lime, control neutral temperature not higher than 80 DEG C, add rear continuation and stir 10min, filtration obtains by-produced gypsum, and filtrate delivers to ammonia still process, and the strong aqua obtained directly can get back to Fe
3o
4production system.
Claims (8)
1. produce a method for Z 250 with iron scale, it is characterized in that, comprise the following steps:
(1) sulfuric acid leaching: leach iron scale at normal temperatures with dilute sulphuric acid, obtains FeSO after filtration
4solution;
(2) slurrying: under non-oxidizing gas protection, to the FeSO that step (1) is produced under normal temperature
4ammoniacal liquor is dripped, precipitation Fe in solution
2+preparation δ-FeOOH presoma;
(3) atmospheric oxidation: utilize the oxygen in air as natural oxygenant, δ-FeOOH oxidation of precursor step (2) produced obtains Z 250;
(4) product collection: Z 250 step (3) produced filters, washing post-drying, obtains the ultra-fine even Fe with good crystallinity
3o
4spherical powder.
2. method according to claim 1, is characterized in that, further comprising the steps of:
(5) ammonia recycle: ammonium sulfate liquor limestone vegetation step (3) be separated, generates calcium sulfate and weak ammonia, obtains by product gypsum after filtration, weak ammonia is evaporated, concentrated after return step (2) recycle.
3. method according to claim 1 and 2, is characterized in that, the FeSO of rate-determining steps (1)
4strength of solution is 0.5 ~ 1.5mol/L.
4. method according to claim 1 and 2, is characterized in that, rate-determining steps (2) ammoniacal liquor drips terminal pH 5.5 ~ 8.0.
5. method according to claim 1 and 2, is characterized in that, described in step (2), non-oxidizing gas is nitrogen, argon gas or helium, preferred nitrogen.
6. method according to claim 1 and 2, is characterized in that, in step (3), oxidizing temperature is 80 ~ 100 DEG C, and oxidization time is 1 ~ 3h; Stir in oxidising process, mixing speed is 300 ~ 600rpm.
7. method according to claim 2, is characterized in that, step (5) described lime is white lime Ca (OH)
2or unslaked lime CaO, neutral temperature is not higher than 80 DEG C.
8. method according to claim 2, is characterized in that, step (5) weak ammonia ammonia still carries out evaporation concentration, and ammonia still control condition is that tower top temperature is not less than 90 DEG C, and column bottom temperature is not less than 95 DEG C.
Priority Applications (1)
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|---|---|---|---|
| CN201510272233.1A CN104828876B (en) | 2015-05-25 | 2015-05-25 | Method for producing ferroferric oxide by using iron scale |
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|---|---|---|---|
| CN201510272233.1A CN104828876B (en) | 2015-05-25 | 2015-05-25 | Method for producing ferroferric oxide by using iron scale |
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|---|---|
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| CN104828876B CN104828876B (en) | 2016-08-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236496A (en) * | 2015-11-24 | 2016-01-13 | 郭秋丰 | Production method for preparing black iron oxide with ammonia circulation method |
| CN105600835A (en) * | 2016-04-01 | 2016-05-25 | 合肥学院 | Method for macroscopic preparation of Fe3O4 nanorods |
| CN108002446A (en) * | 2017-12-13 | 2018-05-08 | 上海宝钢磁业有限公司 | The technique that a kind of iron scale prepares iron oxide black |
| CN113117698A (en) * | 2021-04-21 | 2021-07-16 | 宁夏大学 | Preparation method of magnetic nano iron-molybdenum composite catalyst and application of catalyst |
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| CN1709984A (en) * | 2005-06-08 | 2005-12-21 | 刘世琦 | Method for producing iron oxide black |
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2015
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| CN1709984A (en) * | 2005-06-08 | 2005-12-21 | 刘世琦 | Method for producing iron oxide black |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236496A (en) * | 2015-11-24 | 2016-01-13 | 郭秋丰 | Production method for preparing black iron oxide with ammonia circulation method |
| CN105600835A (en) * | 2016-04-01 | 2016-05-25 | 合肥学院 | Method for macroscopic preparation of Fe3O4 nanorods |
| CN108002446A (en) * | 2017-12-13 | 2018-05-08 | 上海宝钢磁业有限公司 | The technique that a kind of iron scale prepares iron oxide black |
| CN108002446B (en) * | 2017-12-13 | 2019-11-12 | 上海宝钢磁业有限公司 | A kind of technique that iron scale prepares iron oxide black |
| CN113117698A (en) * | 2021-04-21 | 2021-07-16 | 宁夏大学 | Preparation method of magnetic nano iron-molybdenum composite catalyst and application of catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104828876B (en) | 2016-08-17 |
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