Method for preparing wave absorbing material from copper slags, and wave absorbing material

Abstract

The invention provides a method for preparing a wave absorbing material from copper slags, and belongs to the technical field of metallurgy. The method comprises the following preparation steps: mixing copper slags with calcium oxide and then performing tabletting to obtain modified copper slags; performing melting-oxidation on the obtained modified copper slags to obtain oxidation modified copperslags, and separating out a non-full granular magnetite phase; performing crushing and magnetic separation on the oxidation modified copper slags in sequence to obtain a magnetic substance; and grinding the obtained magnetic substance to 70 to 150 nm to obtain the wave absorbing material. According to the method provided by the invention, the copper slags are treated by using the melting-oxidation method, so as to enable iron components in the copper slags to selectively enrich with the magnetite phase, and Fe3O4 nanocrystals are embedded in various oxides, and a small quantity of oxide SiO2with dielectric properties is left still after the magnetic separation, the agglomeration of Fe3O4 particles caused by magnetic properties can be avoided, the synthesis capacity is large, and the massproduction can be realized.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing a wave-absorbing material from copper slag and the wave-absorbing material. Background technique [0002] my country's copper metallurgical enterprises accumulate a large amount of copper slag every year. my country's copper slag is mainly pyro-smelting slag, in addition to a considerable amount of converter slag and wet copper leaching slag. A large amount of copper slag not only occupies land, but also pollutes the environment and causes a huge waste of resources. The typical composition of copper slag is FeO38%~53%, SiO 2 27%~37%, Fe 3 o 4 12%~15%, MgO 1%~3%, CaO 4%~15%, Al 2 o 3 2% to 12%, S 0.46% to 0.79%, Cu 0.17% to 0.33%. It can be seen that the average TFe content in copper slag can reach more than 40%. If the iron resources in copper slag can be effectively developed and utilized, it will have an important impact on promoting the sustain...

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.

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