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Method for preparing wave-absorbing material by means of nickel slag and wave-absorbing material

A technology of wave absorbing material and nickel slag, which is applied in the fields of magnetic materials, inorganic material magnetism, chemical instruments and methods, etc., can solve the problems of low synthesis amount, easy agglomeration of wave absorbing materials, and inability to mass-produce, etc. Avoid the effect of agglomeration

Active Publication Date: 2018-11-16
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above preparation method, the wave-absorbing material is easy to agglomerate during the preparation process, and the amount of synthesis is small, so it cannot be mass-produced industrially.

Method used

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  • Method for preparing wave-absorbing material by means of nickel slag and wave-absorbing material
  • Method for preparing wave-absorbing material by means of nickel slag and wave-absorbing material
  • Method for preparing wave-absorbing material by means of nickel slag and wave-absorbing material

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preparation example Construction

[0062] The present invention also provides the wave absorbing material obtained by the above preparation method, and the wave absorbing material includes the following raw materials composition by mass percentage:

[0063]

[0064] The particle size of the absorbing material is 70-150 nm.

[0065] In the present invention, the particle size of the wave absorbing material is preferably 90-130 nm, more preferably 100-120 nm.

Embodiment 1

[0068] Nickel slag is water quenched nickel slag of flash furnace

[0069] The specific composition is:

[0070]

[0071] Other: 1%.

[0072] After breaking the nickel slag, use a 200 mesh sieve ( 3 O 4 The particle size of the nano crystals is 70 nm to 90 nm, and the wave absorbing material is prepared.

Embodiment 2

[0074] Nickel slag is flash furnace water quenched nickel slag, and its specific composition is:

[0075]

[0076] Other: 1%.

[0077] After breaking the nickel slag, use a 200 mesh sieve ( figure 1 Shown). The oxidized modified nickel slag is crushed to below 200 mesh, and placed in a magnetic separator with a magnetic field strength of 150mT for magnetic separation. Place the magnetic substance in a ball mill, add ethanol as a dispersant, and grind for 24 hours until Fe 3 O 4 The particle size of the nanocrystal is 100nm-120nm, and the wave absorbing material is prepared.

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Abstract

The invention provides a method for preparing a wave-absorbing material by means of nickel slag, and belongs to the technical field of metallurgy. The method comprises the following preparation stepsthat after the nickel slag and calcium oxide are mixed, tabletting is conducted to obtain modified nickel slag; the obtained modified nickel slag is subjected to fusion oxidation, and an non-full particle magnetite phase is separated out, so that oxidized modified nickel slag is obtained; the oxidized modified nickel slag is subjected to breaking and magnetic separation in sequence to obtain a magnetic substance; the obtained magnetic substance is ground into 70-150 nm, so that the wave-absorbing material is obtained. According to the method for preparing the wave-absorbing material by means of the nickel slag, the nickel slag is treated through a fusion oxidation method to make iron in the nickel slag be enriched to the magnetite phase selectively, moreover, Fe3O4 nanocrystals are embedded into multiple kinds of oxides, after magnetic separation, a small amount of dielectric oxide SiO2 still exists, aggregation of Fe3O4 particles due to magnetism is avoided, the synthetic amount is large, and large-scale production can be achieved.

Description

Technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing a wave absorbing material by using nickel slag and the wave absorbing material. Background technique [0002] my country's nickel metallurgical enterprises accumulate a large amount of nickel slag every year. Only Jinchuan Group in Gansu Province discharges more than 1 million tons of nickel slag every year, and the accumulated stockpiles are as much as 40 million tons. A large amount of nickel slag not only occupies the land, but also pollutes the environment, causing a huge waste of resources. The typical composition of nickel slag is FeO 30%~60%, SiO 2 30%~50%, MgO1%~15%, CaO1.5%~5%, Al 2 O 3 2.5% to 6%. It can be seen that the average TFe content in nickel slag can reach more than 40%. If the iron resources in nickel slag can be effectively developed and utilized, it will have an important impact on promoting the sustainable development of nickel metall...

Claims

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Application Information

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IPC IPC(8): C09K3/00H05K9/00H01F1/03
CPCC09K3/00H01F1/0313H05K9/0081
Inventor 申莹莹颜鹏泽黄仔牛杜雪岩种峻楷张文娟
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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