Method for preparing soft magnetic manganese-zinc-iron composite material by using manganese-containing waste liquid and zinc mud produced in the production of hydroquinone

Abstract

The invention discloses a method for preparing a soft magnetic manganese-zinc-iron composite material by using manganese-containing waste liquor and zinc sludge produced during production of p-dihydroxybenzene. The method comprises the following steps: adding the zinc sludge into the manganese-containing waste liquor, leaching under stirring, filtering, adding a flocculating agent into filtrate to remove silicon and aluminum impurities, adding ammonium bicarbonate into purified liquid containing manganese and zinc for co-precipitating, and washing to obtain co-precipitated powder; calcining the co-precipitated powder for decomposing, and washing by using organic acid to obtain a manganese-zinc composite material; and adding iron sesquioxide or a mixture of iron sesquioxide and at least one of manganous-manganic oxide and zinc oxide into the manganese-zinc composite material, and pre-burning to obtain the soft magnetic manganese-zinc-iron composite material. By taking the manganese-containing waste liquor and the zinc sludge produced during production of p-dihydroxybenzene as raw materials, the problem of environmental pollution is solved, high-value utilization of waste is fully realized, and a manufactured magnetic device is free from crystal spots, is non-crispy, and has high shearing resistance as well as fully-qualified physicochemical indexes and electromagnetic performance.

Description

technical field [0001] The invention belongs to a method for preparing a soft magnetic manganese-zinc-iron compound material, and in particular relates to a method for preparing a soft magnetic manganese-zinc-iron compound material by using manganese-containing waste liquid and zinc mud produced in the production of hydroquinone. Background technique [0002] Soft magnetic ferrite is easy to magnetize and demagnetize under weak magnetic field. It is mainly used for various inductive components, such as magnetic cores for filters, transformers, antennas, etc., and magnetic heads for recording and video recorders. At present, the production of soft magnetic Mn-Zn-Fe powder mostly uses the traditional ceramic process. In the production process, high-purity and high-quality raw materials must be used. The requirements for raw materials such as iron red, manganese tetraoxide, and zinc oxide are very high. The requirements for purity and impurities are relatively strict, and the e...

AI Technical Summary

Problems solved by technology

In the production process, high-purity and high-quality raw materials must be used. The requirements for raw materials such as iron red, manganese tetraoxide, and zinc oxide are very high. The requirements for purity and impurities are relatively strict, and the environment is harsh during mechanical mixing. Simultaneous production very high cost

The materials produced will also have defects such as crystal spots and brittleness on the final magnetic device, which seriously affects product quality

[0003] In order to overcome the above shortcomings, people have adopted the co-precipitation process to prepare ferrite, but it has not been mass-produced industrially. The main reasons are two points (1) the use of chemical raw materials and metal raw materials, the cost is high

(2) It is a processed magnetic device, which has serious quality defects, especially the physical properties that cannot meet the specified quality requirements, such as: surface mottled and internal crystal spots of the magnetic device, edge and corner drop during die-cutting of the magnetic device Many technicians have been looking for reasons from the purity of raw materials and the firing of magnetic cores, but have not found a solution

It has not been used to prepare soft magnetic zinc-manganese-iron composites