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Preparation method of aluminum-nickel-cobalt magnetic particles

A magnetic particle, AlNiCo technology, applied in magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of easy loss of magnetic powder, uneven distribution of magnetic field, etc., to achieve enrichment, good sedimentation performance, and reduce loss Effect

Active Publication Date: 2018-11-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a magnetic particle to overcome the problems of uneven magnetic field distribution in the magnetically induced autotrophic denitrification reactor and easy loss of magnetic powder in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Alnico magnetic particles, its components are calculated by weight percentage, Alnico magnetic powder is 94%, binder is 2%, silane KH550 is 4%, and the particle size is 1mm. There is a coating layer on the outside of the particles, and the thickness of the coating layer is 0.1mm. The binder is a mixture of polyvinyl alcohol and sodium alginate, and the mixing weight ratio of polyvinyl alcohol: sodium alginate is equal to 5:3. The coupling agent is silane KH550.

Embodiment 2

[0031] Alnico magnetic particles, its components are calculated by weight percentage, Alnico magnetic powder is 97%, binder is 2%, aluminate is 1%, and the particle size is 4mm. There is a coating layer on the outside of the particles, and the thickness of the coating layer is 0.5mm. The binder is a mixture of polyvinyl alcohol and sodium alginate, and the mixing weight ratio of polyvinyl alcohol: sodium alginate is equal to 5:3.

Embodiment 3

[0033] A method for preparing AlNiCo magnetic particles, comprising the steps of:

[0034] (1) Pass the alnico magnetic powder through a 400-mesh sieve, and dry it in an oven at 100°C for later use;

[0035] (2) Mix the dry alnico magnetic powder obtained in step (1) and silane KH550 in absolute ethanol according to the following weight percentages and stir evenly, let stand for 30 minutes, dry in an oven at 100°C, and take The dry powder is ready for use; the percentage by weight is: dry AlNiCo magnetic powder accounts for 95%, and silane KH550 accounts for 5%;

[0036] (3) Mix the dry powder mixture obtained in step (2) with the binder according to the following weight percentages: the dry powder mixture accounts for 84%, and the binder solution accounts for 16%. Extruded into raw meal balls, the particle size of the raw meal balls is 1mm; the binder solution is a mixture of 5% polyvinyl alcohol aqueous solution and 3% sodium alginate aqueous solution at a volume ratio of 1...

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PUM

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Abstract

The invention discloses a preparation method of aluminum-nickel-cobalt magnetic particles and belongs to the technical field of wastewater treatment materials. The method comprises the following stepsof (1) screening aluminum-nickel-cobalt magnetic powder through a screen, putting the aluminum-nickel-cobalt magnetic powder into an oven and drying at 80-100 DEG C for later use; (2) mixing and stirring the dried aluminum-nickel-cobalt magnetic powder obtained in the step (1) and a coupling agent in absolute ethyl alcohol, standing for 20-40min, drying in the oven at 80-100 DEG C and taking thedried powder for later use; (3) mixing a dried powder mixture obtained in the step (2) and a binder evenly and then extruding the mixture into raw material pellets under an internal spherical mold with the pore size of 1-4mm; and (4) putting the raw material pellets obtained in the step (3) into the oven and drying at 60-80 DEG C to obtain finished products.

Description

[0001] This patent application is a divisional application of a patent application with an application date of February 21, 2017, an application number of 201710092223.9, and an invention titled "a kind of AlNiCo magnetic particle and its preparation method". technical field [0002] The invention belongs to the technical field of wastewater treatment materials, and relates to an AlNiCo magnetic particle and a preparation method thereof. Background technique [0003] Traditional wastewater denitrification biological treatment technology often adopts AO (anaerobic aerobic) or AAO (anaerobic anoxic aerobic) process. The removal of nitrogen needs to go through ammonification reaction, nitrification reaction and denitrification reaction and finally remove it from the water body. Among them, the ammonification reaction can be carried out under anaerobic or aerobic conditions, while the nitrification reaction can only be carried out under aerobic conditions, and the denitrification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/01H01F1/055H01F41/00C02F3/28
CPCC02F3/2806C02F2003/001C02F2101/16H01F1/01H01F1/0552H01F1/0558H01F41/00
Inventor 王嘉斌张栋李天杭朱玲丽
Owner UNIV OF JINAN