Production of Mn-zn ferrite from waste magnesium dioxide batteries

A technology of manganese-zinc ferrite and zinc-manganese batteries, which is applied in the direction of battery recycling, regeneration of useful parts, recycling technology, etc., and can solve problems such as low separation purity, high added value of products, and large consumption

Inactive Publication Date: 2005-07-27
HENAN NORMAL UNIV
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Problems solved by technology

The present invention adopts the liquid leaching method to extract the manganese-zinc-iron substance of the waste battery, and adds appropriate materials according to the ratio of the manganese-zinc-ferrite composition to make the manganese-zinc-ferrite product. This magnetic material has a wide range of uses. Large dosage and high added value of the product, thus avoiding the problems of high energy consumption and low separation purity caused by the separation of manganese, zinc and iron in the recycling process of waste batteries

Method used

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Embodiment Construction

[0004] The current waste battery recycling adopts liquid leaching method or high temperature heating method to separate the metal elements in the waste battery from other impurities, and then separate and purify the separated metals. Due to the separation of different metals, especially When the purity is high, the separation is difficult, the energy consumption is large, the separation process is complicated, the cost is high and the purity is low. MnZn ferrite is a kind of magnetic material with excellent performance. It is widely used in transformers, radio communications and aerospace, etc. It has a large amount of use and high added value. Its main component is MnZn ferrite. Therefore, the known leaching method can be used to extract the zinc, manganese and iron in the waste zinc-manganese battery. After removing the mercury, the ratio of the solution containing manganese, zinc and iron is adjusted according to the composition ratio requirements of the zinc-manganese ferri...

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Abstract

The method includes liquid extraction and filter processes. Iron powder being more than mercury content is added into the above extracted and filtered solution. The mercury is removed and an amount of Fe(NO3)3, Fe(NO2)3, Zn(NO3)2, Mn(NO3)2 are added. The total metal ionic concentration is made to be 1mol/L. MnO: ZnO: FeO=0.6:0.4:1.0 (mol ratio).After the above solution is heated, the citric acid is added. After evaporation the sol is obtained. After drying the sol the xerogel is obtained. After xerogel is calcinated, the manganese-zinc ferrite is obtained.

Description

Technical field: [0001] The invention relates to a method for preparing manganese-zinc ferrite, in particular to a method for preparing manganese-zinc ferrite by using waste zinc-manganese batteries. Background technique: [0002] The widespread use of dry batteries not only consumes a large amount of metal materials such as manganese, zinc, and iron, but also the discarding of waste batteries causes serious pollution to the environment. Research on the recycling of waste batteries has become a major topic. According to literature reports, there are currently two laboratory methods for recycling waste batteries, one is high-temperature heating method, and the other is liquid leaching method, which can recover some metals and their compounds, but these two methods have obvious shortcomings. It is characterized by complex process and low added value of products, which makes it difficult to separate different metals. Invention content: [0003] The technical problem to be s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01M6/52H01M10/54
CPCY02E60/12Y02W30/84
Inventor 席国喜李运清
Owner HENAN NORMAL UNIV
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