Method for producing ferroferric oxide with chemical activity

Abstract

The invention belongs to the technical field of methods for producing ferroferric oxide, and particularly relates to a method for producing ferroferric oxide with chemical activity. The invention aims to provide the method for producing the ferroferric oxide with chemical activity. The method comprises the following steps of: (1) adding strong acid ammonium salt in an amount which is 0.35 to 0.40mol / L ammonium content of the reaction solution into ferrous sulfate solution, heating the solution and mixing the solution uniformly; (2) adding sodium hydroxide solution into the reaction solution to control the ferrous content of the reaction solution at 3 to 9g / L, then adding a catalytic reducing agent in an amount which is 4 to 5 percent of the weight of the ferrous iron in the reaction solution into the solution, and continuously reacting the solution for 20 to 40 minutes; (3) performing filtration, washing and drying to obtain solid; and (4) after the solid obtained in the step (3) is crushed, conveying the crushed solid into a reduction furnace and reducing the solid to obtain the ferroferric oxide with chemical activity. The ferroferric oxide produced by the method has high chemical activity, low impurity content and good stability, and is convenient for industrialized implementation.

Description

technical field [0001] The invention belongs to the technical field of production methods of ferric oxide, in particular to a production method of chemically active ferric oxide. Background technique [0002] Fe3iron tetroxide has been widely used as functional materials, magnetic recording materials, battery active materials, special catalyst raw materials, magnetic pigments, etc. due to its easy-to-obtain raw materials and low price. At present, the preparation method of ferroferric oxide is traditional hydrolysis method or direct synthesis method. The hydrolysis method uses ferrous sulfate to react with alkaline substances to generate ferric hydroxide, which is hydrolyzed into ferric oxide. The direct synthesis method uses hydrogen Ferrous oxide and ferric oxide directly undergo addition reaction at a certain temperature and pH value to generate ferric oxide. Whether it is prepared by the hydrolysis method or the direct synthesis method, the ferroferric oxide has no chem...

AI Technical Summary

Problems solved by technology

It cannot be used as an active substance or additive for iron electrodes and cadmium electrodes in alkaline storage batteries, and the discharge performance is very poor, which cannot meet the needs of the development of related alkaline storage batteries