Method for preparing soft magnetic manganese-zinc ferrite composite by removing impurities from industrial waste step by step
US12065360B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2023 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Dec 13, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a method for preparing a soft magnetic manganese-zinc ferrite composite by removing impurities from industrial waste step by step. Manganese-containing waste residue is crushed and dried, and then mixed with a flux in a muffle furnace and roasted at a temperature below 1000° C. till solid-liquid stratification; then, multi-step impurity removal is performed to obtain a high-purity quaternary purification solution of manganese sulfate. Similarly, zinc residue is melted to remove impurities, and then multi-step impurity removal is performed to obtain a high-purity quaternary purification solution of zinc sulfate. According to a manganese-zinc-iron ratio required for the manganese-zinc ferrite, the two purification solutions are mixed, and ferrous sulfate is added. The mixed purification solution is coprecipitated with ammonium bicarbonate, washing is performed, and co-precipitated powder is decomposed into ferric oxide, manganese tetroxide and zinc oxide which are then roasted to obtain the manganese-zinc ferrite composite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.