直接共沉淀法制备锰锌软磁铁氧体共沉粉

Study on Preparation of Mn-Zn Ferrite Powder by Direct Coprecipitation

以锌烟灰、软锰矿和机械厂废铁屑为原料,经同时浸出,净化和共沉淀后制取锰锌软磁铁氧体用前驱体.结果表明,同时浸出过程中铁、锰、锌的直收率分别为97.84%,92.47%和90.18%,浸出液中硅铝杂质含量分别为29.29和6.7mg/L;经过净化过程后,净化液中的硅、铝、铜、镉、铅等杂质含量低,相对较难去除的铅镉杂质的脱除率分别为92.61%和95.90%;经过共沉淀后,共沉粉中的钙镁杂质含量分别为0.07%和0.05%.得到的共沉粉经铁氧体工艺后产品质量均优于PC30的标准.

Preparation on Mn-Zn ferrite precursor from scrap iron, pyrolusite and zinc oxide dust by direct coprecipitation method was introduced. The main processes of the method include simultaneous leaching, primary purification, deep purification, coprecipitation. The experiment al results showed that the extraction rates of Fe, Mn, and Zn were 97.84%, 92.47% and 90.18% by simultaneous leaching. The concentrations of Al and Si were 29.29 mg/L and 6.7 mg/L, respectively. After purification, the concentrations of Si, Al, Cu, Cd, and Pb were very low, especially the elimination rates of Pb and Cd were 92.61% and 95.90%. The concentrations of Ca and Mg were 0.07% and 0.05% in the coprecipitated powder after the coprecipitation. The experimental data of ferrite technology confirmed that the magnetic properties of Mn-Zn soft magnetic ferrite product were superior to those of PC30 made by TDK company in Japan.