CN108766699A - A kind of preparation method of alnico magnetic-particle - Google Patents
A kind of preparation method of alnico magnetic-particle Download PDFInfo
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- CN108766699A CN108766699A CN201810666678.1A CN201810666678A CN108766699A CN 108766699 A CN108766699 A CN 108766699A CN 201810666678 A CN201810666678 A CN 201810666678A CN 108766699 A CN108766699 A CN 108766699A
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- alnico
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- magnaglo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0551—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0552—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes with a protective layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0558—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together bonded together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Abstract
A kind of preparation method of alnico magnetic-particle, belongs to wastewater treatment field of material technology, includes the following steps:（1）By the sieving mesh screen choosing of alnico Magnaglo, it is placed in baking oven and is dried for standby at 80-100 DEG C；（2）By step（1）The drying alnico Magnaglo and coupling agent of middle acquisition are mixed and stirred for uniformly, standing 20-40min, drying at 80-100 DEG C in baking oven, take dried powder spare in absolute ethyl alcohol；（3）By step（2）It obtains dry powder mixture and adhesive after mixing, raw material ball is squeezed into the case where interior apertured diameter is the spherical module of 1-4mm；（4）By step（3）The raw material ball of acquisition is placed in baking oven and is dried at 60-80 DEG C, obtains finished product.
Description
It is on 2 21st, 2017 that present patent application, which is the applying date, application No. is 201710092223.9, invention and created name
For the divisional application of " a kind of alnico magnetic-particle and preparation method thereof " patent application.
Technical field
The invention belongs to wastewater treatment field of material technology, it is related to a kind of alnico magnetic-particle and preparation method thereof.
Background technology
Conventional waste water denitrification organisms treatment technology, frequently with AO（Anaerobic-aerobic）Or AAO（Anaerobic/anoxic is aerobic）Technique,
The removal of nitrogen needs finally to remove from water body by aminating reaction, nitration reaction and anti-nitration reaction.Wherein aminating reaction can
It is carried out under anaerobism or aerobic condition, and nitration reaction can only carry out under aerobic condition, anti-nitration reaction can only be in anaerobism item
It is carried out under part.In order to which the removal effect nitration reaction and anti-nitration reaction that ensure nitrogen usually carry out in different reactors, nitre
Change process needs to be aerated to ensure that sufficient dissolved oxygen, denitrification process need to add carbon source to ensure carbon-nitrogen ratio, the above aeration
And its add the operating cost that carbon source link improves denitrification process, but also the floor space of traditional biological denitrification process compared with
Greatly.
It is nitrous state that principle from nutrition denitrification process, which is ammonia oxidation bacteria using dissolved oxygen a small amount of in water by mineralized nitrogen,
Nitrogen, then anaerobic ammonia oxidizing bacteria carry out Anammox reaction using nitrite nitrogen and ammonia nitrogen and generate nitrogen by nitrogen from water
It removes.Relative to traditional AO and AAO techniques, it can be completed in same reactor from nutrition denitrification process, be not required to additional carbon,
Demand to dissolved oxygen is low, so as to greatly reduce floor space, reduces operating cost.From in nutrition denitrification process,
Anammox reaction is to influence the key link of reactor denitrification efficiency, and the anaerobic ammonia oxidizing bacteria generation cycle is long, and enrichment is tired
Difficulty, this to develop slowly from nutrition denitrification process.
Research has shown that paramagnetic properties are presented in the atom of constitutive enzyme under most conditions, and magnetic field passes through the effect to paramagnetic atoms
Enzymatic activity can indirectly be influenced.Magnetic field can effectively promote the activity from anaerobic ammonia oxidizing bacteria in nutrition denitrification reactor, have
Conducive to its fast enriching.
Wang Xiang is published in for third 2000《Environmental science and technology》" biological effects of magnetization in sewage treatment " one
It is found in text, magnetic field can promote the increase of aerobic respiration place mitochondria number, therefore microbial activity also gets a promotion.Korea Spro
Celebrate it is auspicious be equal to 2002 be published in《Fusun PetroleumCollege's journal》In " magnetic field is made by the reinforcing of Wastewater Treated by Activated Sludge Process waste water
With " one the article pointed out, the activity of enzyme can be stimulated to improve when magnetic field intensity is less than 0.05T, and the treatment effeciency of waste water also carries
It is high by 11%.Wang Qiang was in Harbin Institute of Technology Ph.D. Dissertation in 2010《The biological denitrificaion mechanism of magnetic strength aerobic denitrifying bacteria
With efficiency》In point out that the removal rate of the nitrate nitrogen when applied field strengths are 150 mT improves 7.2 %, and dehydrogenase
Activity also improves 2.38 times；The removal of ammonia nitrogen is promoted when magnetic field intensity is between 30~90 mT, and works as magnetic field intensity
The ammonia nitrogen removal best results in 60mT.The mode that the above results are all made of externally-applied magnetic field conducts a research work, but externally-applied magnetic field
Magnetic field intensity in water increases and rapid decay with the distance apart from magnetic field sources, it is difficult to ensure that magnetic field intensity in reactor
It is uniformly distributed.
In order to solve the problems, such as that above-mentioned Distribution of Magnetic Field is uneven, Dai Kelin etc. 2010 is published in《It is resource-effective with it is environmentally friendly》's
It proposes to add the side of magnetic powder into sewage in " mechanism of action and its application of the magnetic effect to Wastewater Treated by Activated Sludge Process sewage " text
Formula improves Distribution of Magnetic Field.It is recorded according to this article, when magnetic powder dosage increases to 1.5g by 0.0g, the activity of dehydrogenase is in improve
Trend can be declined slightly instead if being further added by the active increase rate of magnetic powder dosage dehydrogenase on this basis.
In conclusion applying magnetic field in the reactor, the activity of anaerobic ammonia oxidizing bacteria in reactor is helped to improve, from
And improve reactor NH_3-N treating efficiency.Applying the mode of magnetic field sources in reactor helps to improve the magnetic field intensity in reactor
The uniformity of distribution.But the mode of magnetic powder is added directly in reactor, magnetic powder is easily along with reaction in actual moving process
The drainage procedure of device and be lost in.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of magnetic-particle, with overcome in the prior art it is magnetic induced from
The problems such as nutrition denitrification reactor Distribution of Magnetic Field is uneven and magnetic powder is easy to run off.
A kind of alnico magnetic-particle, in percentage by weight, alnico Magnaglo is 94%-97%, glues component
Mixture is 1%-2%, coupling agent 2%-4%, grain diameter 1-4mm.
Preferably, extra-granular has clad, coating thickness to be not more than 0.5mm.
Described adhesive is the mixture of polyvinyl alcohol and sodium alginate, and mixed weight compares polyvinyl alcohol：Sodium alginate etc.
In 5：3.
The coupling agent is silane KH550.
The coupling agent is Aluminate.
A kind of preparation method of alnico magnetic-particle, includes the following steps:
（1）By alnico Magnaglo sieving mesh screen choosing, sieve specification be 200 mesh between 400 mesh, be placed in 80-100 in baking oven
It is dried for standby at DEG C；
（2）By step（1）The drying alnico Magnaglo and coupling agent of middle acquisition are according to following weight percentage, in anhydrous second
It is mixed and stirred for uniformly, standing 20-40min, drying at 80-100 DEG C in baking oven, take dried powder spare in alcohol；Described
Weight percent is：Dry alnico Magnaglo accounts for 95%-98%, and coupling agent accounts for 2%-5%；
（3）By step（2）Dry powder mixture is obtained to be mixed according to following weight percent with adhesive：Dried powder
Mixture accounts for 84%-90%, and binder solution accounts for 10%-16%, after mixing, in the case where interior apertured diameter is the spherical module of 1-4mm
It is squeezed into raw material ball；
（4）By step（3）The raw material ball of acquisition is placed in baking oven and is dried at 60-80 DEG C, obtains finished product.
Preferably, by step（3）The raw material ball of acquisition, is dipped in covering, in 35 k Hz of supersonic frequency, ultrasound intensity
5-15min is coated under conditions of 0.6 W/m L, coating thickness is not more than 0.5mm, then carries out step（4）.
Preferably, described adhesive solution be 5% polyvinyl alcohol water solution and 3% sodium alginate aqueous solution by volume
1：1 mixed liquor.
Preferably, the coupling agent is silane KH550.
Preferably, the coupling agent is Aluminate.
Preferably, the covering, by weight percentage, dry Kynoar (PVDF) are 18%, dimethylacetamide
Amine is 72%, and pore former NaCl is 10%.
A kind of magnetic-particle of alnico provided by the invention, moderate in grain size, density is smaller, under certain hydraulics
It can be suspended in reaction unit.It can be applied to from nutrition denitrification reactor, help to improve Anammox in reactor
The activity of bacterium is conducive to the attachment and growth of microorganism in reactor, reduces the loss of microorganism, improves the biology in reactor
Amount, while also contributing to the quick startup from nutrition denitrification reaction system.The magnetic-particle is added to wastewater treatment equipment
Interior, magnetic-particle can be in suspended state with the hydraulic mixing in reactor, be advantageously implemented uniform point of magnetic field in reactor
Cloth, solves in magnetic biological coupling technology that magnetic field intensity is weak, the problem that Distribution of Magnetic Field is uneven and Granular sludge formation is slow.
The magnetic-particle is provided simultaneously with preferable settling property, is not easy to be lost in the draining of reactor.
Magnetic-particle prepared by alnico magnetism preparation method of granules provided by the invention, takes the Magnaglo, adhesive to be
Primary raw material after being fabricated to magnetic-particle raw material ball, coats one layer of covering, avoids reuniting between raw material ball agglomerating, and have
Certain antisepsis.Contain pore former in covering, the big specific surface area of particle surface is to the pollutant in waste water after cladding
There is preferable suction-operated, is conducive to microorganism in its surface enrichment, accelerates the formation of granule sludge.The magnetic-particle is reacting
Neural stem cell steady in a long-term is carried out to microorganism in device, big specific surface area provides more attachment points for microorganism, as
The kernel of grain sludge, accelerates the formation of granule sludge, improves contaminant removal efficiency.Magnetic-particle preparation side provided by the invention
Method is not required to high-temperature firing, and preparation method is simple, energy saving, and the requirement to process equipment is relatively low.
Specific implementation mode
The present invention is described in detail with reference to embodiment.
Embodiment one：
Alnico magnetic-particle, in percentage by weight, alnico Magnaglo is 94% to component, adhesive 2%, silane
KH550 is 4%, grain diameter 1mm.Extra-granular has clad, coating thickness 0.1mm.Described adhesive is polyethylene
The mixture of alcohol and sodium alginate, mixed weight compare polyvinyl alcohol：Sodium alginate is equal to 5：3.The coupling agent is silane
KH550。
Embodiment two：
Alnico magnetic-particle, in percentage by weight, alnico Magnaglo is 97% to component, adhesive 2%, aluminic acid
Ester is 1%, grain diameter 4mm.Extra-granular has clad, coating thickness 0.5mm.Described adhesive is polyvinyl alcohol
With the mixture of sodium alginate, mixed weight compares polyvinyl alcohol：Sodium alginate is equal to 5：3.
Embodiment three：
A kind of preparation method of alnico magnetic-particle, includes the following steps：
（1）Alnico Magnaglo is crossed into 400 mesh sieve, is placed in baking oven and is dried for standby at 100 DEG C；
（2）By step（1）The drying alnico Magnaglo and silane KH550 of middle acquisition are according to following weight percentage, in nothing
It is mixed and stirred for uniformly, standing 30min, drying in baking oven 100 DEG C, take dried powder spare in water-ethanol；The weight
Measuring percentage is：Dry alnico Magnaglo accounts for 95%, and silane KH550 accounts for 5%；
（3）By step（2）Dry powder mixture is obtained to be mixed according to following weight percent with adhesive：Dried powder
Mixture accounts for 84%, and binder solution accounts for 16%, after mixing, sets be squeezed into raw material ball under the mold of ball-type inside, the life
Pellet grain size is 1mm；Described adhesive solution be 5% polyvinyl alcohol water solution and 3% sodium alginate aqueous solution by volume
1：1 mixed liquor；
（4）By step（3）It is dipped in covering, is coated under conditions of 35 k Hz of supersonic frequency, 0.6 W/m L of ultrasound intensity
10min, coating thickness 0.3mm are subsequently placed in baking oven and are dried at 60 DEG C, the covering, by weight percentage, do
Dry Kynoar (PVDF) is 18%, dimethylacetylamide 72%, and pore former NaCl is 10%.
The alnico magnetic-particle prepared in above-described embodiment one is taken, is filled in reactor, additive amount 20g/L, energy
Enough form the magnetic field intensity of 0.78mT.Magnetic-particle is measured by counting method to be added in activated sludge after 1d, total heterotrophic bacteria count
Reach 8 × 105 A ml-1。
Example IV：
A kind of preparation method of alnico magnetic-particle, includes the following steps：
（1）Alnico Magnaglo is crossed into 200 mesh sieve, is placed in baking oven and is dried for standby at 90 DEG C；
（2）By step（1）The drying alnico Magnaglo and Aluminate of middle acquisition are according to following weight percentage, in anhydrous second
It is mixed and stirred for uniformly, standing 30min, drying in baking oven 90 DEG C, take dried powder spare in alcohol；The weight percent
Than for：Dry alnico Magnaglo accounts for 96%, and Aluminate accounts for 4%；
（3）By step（2）Dry powder mixture is obtained to be mixed according to following weight percent with adhesive：Dried powder
Mixture accounts for 88%, and binder solution accounts for 12%, after mixing, sets be squeezed into raw material ball under the mold of ball-type inside, the life
Pellet grain size is 2mm；Described adhesive solution be 5% polyvinyl alcohol water solution and 3% sodium alginate aqueous solution by volume
1：1 mixed liquor；
（4）By step（3）It is dipped in covering, is coated under conditions of 35 k Hz of supersonic frequency, 0.6 W/m L of ultrasound intensity
8min, coating thickness 0.2mm are subsequently placed in baking oven and are dried at 60 DEG C, the covering, by weight percentage, do
Dry Kynoar (PVDF) is 18%, dimethylacetylamide 72%, and pore former NaCl is 10%.
The composite magnetic particle prepared in above-described embodiment is taken, is filled in reactor, additive amount 20g/L being capable of shape
At the magnetic field intensity of 0.8mT.Magnetic-particle is measured by counting method to be added in activated sludge after 1d, total heterotrophic bacteria count reaches
8.5×105 A ml-1。
Claims (5)
1. a kind of preparation method of alnico magnetic-particle, which is characterized in that include the following steps:
（1）By alnico Magnaglo sieving mesh screen choosing, sieve specification be 200 mesh between 400 mesh, be placed in 80-100 in baking oven
It is dried for standby at DEG C；
（2）By step（1）The drying alnico Magnaglo and coupling agent of middle acquisition are according to following weight percentage, in anhydrous second
It is mixed and stirred for uniformly, standing 20-40min, drying at 80-100 DEG C in baking oven, take dried powder spare in alcohol；Described
Weight percent is：Dry alnico Magnaglo accounts for 95%-98%, and coupling agent accounts for 2%-5%；
（3）By step（2）Dry powder mixture is obtained to be mixed according to following weight percent with adhesive：Dried powder
Mixture accounts for 84%-90%, and binder solution accounts for 10%-16%, after mixing, in the case where interior apertured diameter is the spherical module of 1-4mm
It is squeezed into raw material ball；The raw material ball of acquisition is dipped in covering, in 35 k Hz of supersonic frequency, 0.6 W/m L of ultrasound intensity
Under conditions of coat 5-15min, coating thickness is not more than 0.5mm, then carries out step（4）；The covering is poly- by drying
Vinylidene (PVDF), methylacetamide and pore former NaCl compositions.
2. the preparation method of alnico magnetic-particle according to claim 1, which is characterized in that described adhesive solution is
5% polyvinyl alcohol water solution and 3% sodium alginate aqueous solution by volume 1：1 mixed liquor.
3. the preparation method of alnico magnetic-particle according to claim 2, which is characterized in that the coupling agent is silicon
Alkane KH550.
4. the preparation method of alnico magnetic-particle according to claim 3, which is characterized in that the coupling agent is aluminium
Acid esters.
5. according to the preparation method of the alnico magnetic-particle described in claim 1-4 any one claims, which is characterized in that
The covering, by weight percentage, dry Kynoar (PVDF) are 18%, dimethylacetylamide 72%, pore former
NaCl is 10%.
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| CN201710092223.9A CN106803450B (en) | 2017-02-21 | 2017-02-21 | A kind of alnico magnetic-particle and preparation method thereof |
| CN201810666678.1A CN108766699B (en) | 2017-02-21 | 2017-02-21 | A kind of preparation method of alnico magnetic-particle |
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| CN109786098A (en) * | 2019-01-11 | 2019-05-21 | 横店集团东磁股份有限公司 | A kind of preparation method of the flexible rubber neodymium iron boron magnetic body of high filling proportion |
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| CN114920352B (en) * | 2022-05-19 | 2023-03-31 | 中建环能科技股份有限公司 | Heterotrophic denitrification carrier and preparation method and use method thereof |
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Also Published As
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|---|---|
| CN106803450A (en) | 2017-06-06 |
| CN106803450B (en) | 2018-12-21 |
| CN108766699B (en) | 2019-10-01 |
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