摘要
针对电解金属锰法制备软磁用四氧化三锰因原料价格波动而成本过高的问题,以工业含锰废水净化所得硫酸锰溶液为原料,通过水热氧化法制备低成本软磁用四氧化三锰,以解决传统工艺的经济性缺陷。通过单因素实验优化反应参数,系统探究了pH、搅拌强度、反应温度、进料速度及洗涤方式对产物化学纯度与物理性能的影响。结果表明:在pH为10.5、反应温度为50℃、搅拌强度为40 Hz、进料速度为8.5 L/h条件下,所得四氧化三锰的锰含量达70.73%,杂质含量显著降低,物理性能符合软磁行业标准。采用搅洗处理可进一步减少用水量,且产品杂质Ca、Na、S含量较淋洗处理更低,接近电解锰法指标,为三元电池废水资源化及低成本软磁材料工业化提供了可靠的技术路径。
To mitigate cost volatility inherent to the electrolytic-manganese-metal(EMM)route,soft-magnetic Mn_(3)O_(4)was synthesised via hydrothermal oxidation of purified MnSO 4 liquor recovered from industrial Mn-bearing effluent.Single-factor tests optimised reaction parameters—pH,agitation,temperature,feed rate and washing mode—on purity and physical properties.Optimal conditions(pH 10.5,50℃,40 Hz,8.5 L/h)yielded Mn_(3)O_(4)containing 70.73%Mn with markedly reduced impurities,meeting soft-ferrite industry specifications.Agitation washing cut water use and lowered Ca/Na/S levels,approaching EMM-grade quality.The process offers a scalable green-processing route for ternary-battery wastewater valorisation and low-cost soft-magnetic materials.
作者
罗文宗
康凯
任莹
牛春光
顾尚波
LUO Wenzong;KANG Kai;REN Ying;NIU Chunguang;GU Shangbo(Guizhou Jinrui New Material Co.,Ltd.,Tongren,Guizhou 554399,China)
出处
《中国锰业》
2025年第2期111-114,共4页
China Manganese Industry
关键词
软磁用四氧化三锰
硫酸锰溶液
水热氧化法
软磁铁氧体
工艺优化
soft-magnetic Mn_(3)O_(4)
MnSO 4 liquor
hydrothermal oxidation
soft ferrite
wastewater valorisation
