Method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake

A technology of ferric tetroxide and desiliconized mud cake, which is applied in iron oxide/iron hydroxide, nanotechnology for materials and surface science, nanotechnology, etc., to achieve uniform particle size dispersion, easy demagnetization, and easy charging. magnetic effect

Inactive Publication Date: 2013-01-09
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of preparing nano-iron ferric oxide by using acid-regenerated desiliconized mud cake achieves the purpose of comprehensive environmental pollution control and solves the problem of resource recovery and reuse

Method used

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  • Method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake
  • Method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake

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Embodiment 1

[0030] A kind of method utilizing acid regeneration desiliconization mud cake to prepare nano iron ferric oxide, specifically comprises the following steps:

[0031] (1) Add 500mL of water to 200g of massive desiliconized mud cake, and make a slurry under the condition of heating at 80°C, and finally form a desiliconized slurry with good dispersibility;

[0032] (2) According to the mass volume ratio of desiliconized mud cake and regenerated acid, that is, the ratio of desiliconized mud cake: regenerated acid is 1g: 2ml, add regenerated acid to the desiliconized mud obtained in step (1), and continue After heating and stirring at 80°C for 2 hours, throw 100g of thin iron side material, heat to 80°C to achieve acid dissolution and reduction of the desiliconized mud cake, then filter, wash with water, adjust pH=4 with ammonia water, and set the volume to 1L to obtain iron turbid liquid;

[0033] (3) Take the ferrous chloride turbid solution obtained in step (2), add 600g of dod...

Embodiment 2

[0038] A kind of method utilizing acid regeneration desiliconization mud cake to prepare nano iron ferric oxide, specifically comprises the following steps:

[0039] (1) Add 400ml of water to 200g of massive desiliconized mud cake, and beat under the condition of heating at 80°C, and finally form desiliconized mud with better dispersibility;

[0040] (2) According to the mass volume ratio of desiliconized mud cake and regenerated acid, that is, the ratio of desiliconized mud cake: regenerated acid is 1g: 2ml, add regenerated acid to the desiliconized mud obtained in step (1), and continue for 80 After heating and stirring at ℃ for 2 hours, put in 200g of thin iron trim, heat to 85℃ to achieve acid dissolution and reduction of the desiliconized mud cake, then filter and wash with water, adjust the pH to 4 with ammonia water, and set the volume to 500ml to obtain chlorinated ferrous turbid liquid;

[0041] (3) Take the ferrous chloride turbid solution obtained in step (2), add ...

Embodiment 3

[0044] A kind of method utilizing acid regeneration desiliconization mud cake to prepare nano iron ferric oxide, specifically comprises the following steps:

[0045] (1) Add 400mL of water to 200g of massive desiliconized mud cake, and beat under the condition of heating at 80℃, and finally form desiliconized mud with good dispersibility;

[0046](2) According to the mass volume ratio of desiliconized mud cake and regenerated acid, that is, the ratio of desiliconized mud cake: regenerated acid is 1g: 2ml, add regenerated acid to the desiliconized mud obtained in the above (a) step, and continue After heating and stirring at 80°C for 2 hours, put in 160g of thin iron scrap, heat to 85°C to achieve acid dissolution and reduction of the desiliconized mud cake, then filter and wash with water. Adjust the pH=4 with ammonia water, and set the volume to 500ml to obtain the ferrous chloride turbid solution;

[0047] (3) Add 840 g of n-octadecylamine to the ferrous chloride turbid sol...

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Abstract

The invention discloses a method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake. The method comprises the steps as follows: adding water to desilicated mud cake, heating and pulping to obtain desilicated slurry which has good dispersibility; and then adding acid for regeneration to the obtained desilicated slurry; heating and uniformly agitating; then adding thin iron rim charge after reacting for 2 hours; heating to 80 to 90 DEG C so as to achieve acid dissolution and reduction to the desilicated mud cake; filtering, washing with water, and adjusting pH to 4 through ammonia water to obtain filtrate which is ferrous chloride turbid solution; further adding fatty acid to carry out oxidization; centrifuging, washing and drying to obtain nanometer ferroferric oxide rough product; finally ultrasonically dispersing the nanometer ferroferric oxide rough product into the water; magnetically attracting and separating; and then drying in a vacuum drying box at 60 to 90 DEG C so as to obtain nanometer ferroferric oxide. According to the method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake disclosed by the invention, the recycling and reusing of industrial waste desilicated mud cake is achieved, and the environmental pollution can be reduced.

Description

technical field [0001] The invention relates to a method for preparing a soft magnetic material, in particular to a method for preparing nano ferroferric oxide by using industrial waste desiliconized mud cake obtained after recycling waste acid in a cold rolling steel plant as a raw material. Background technique [0002] Nano-ferroferric oxide is an important spinel-type ferrite, and when its particle diameter is smaller than a certain critical size, it will produce superparamagnetism. This material is very easy to magnetize under the external magnetic field. When the external magnetic field is cancelled, it is very easy to demagnetize. It is a soft magnetic material that will not be permanently magnetized. Due to its special magnetic and electrical properties, it has broad application prospects in the fields of magnetic fluid, magnetic recording, and medical targets. [0003] At present, the methods used to prepare nano-Fe3O4 include co-precipitation method, pyrolysis met...

Claims

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Application Information

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IPC IPC(8): C01G49/08B82Y30/00
Inventor 付斌张娜李学娇
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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