用钢板酸洗液及废电池制作锰锌铁氧磁体铁芯

Research on Produce Mn-Zn Ferrite Core from Steel Pickling Solution and Scrap Dry Batteries

利用钢板酸洗废液的含铁成份及还原性,利用废干电池的含锰锌成份及二氧化锰的氧化性,产生氧化还原反应,使废干电池释出锰锌等离子,产生含铁锰锌等离子的溶液。此溶液经过ICP分析,加入二氧化锰,配成适合制成锰锌系铁氧磁体所需的成份,再利用化学共沉法加碱,产生铁、锰、锌的混合氢氧化物。此氢氧化物经过水洗、烘干、煅烧、研磨、造粒、成型及烧结,制成锰锌系铁氧磁体铁芯。结果显示,锰锌系铁氧磁粉的晶体为尖晶石立方结构,其晶粒大小为30—50 nm,饱和磁束密度为58.6 emu/g,经1 200℃烧结铁芯的饱和磁束密度为93.4 emu/g(5 023 gauss)。其初导磁率从数百到数千,q值约数十,依频率而定。

This research utilizes steel pickling solution＇s iron content and reductive property, dry batteries＇ manganese and zinc content and oxidative property. When these two scrap materials were mixed, a reduction-oxidation reaction occurred and a chloride solution containing iron, manganese, and zinc ions was produced. The composition of this solution was analyzed by ICP and extra Mn ore was added to produce a composition of Mn-Zn ferrite needed. Chemical co-precipitation method was used to precipitate Mn, Zn, and Fe hydroxide mixture. The mixture was washed and dried to produce nano-sized Mn-Zn ferrite powder. The powder was calcined, ground, granulated, compacted, and sintered to produce ferrite iron core. The experimental results show that the Mn-Zn ferrite powder has a spinel structure, with particle sizes of 30-50 nm and its Bs is 58.6 emu/g. After sintering its Bs is 93.4 emu/g （5 023 gauss）. The μi values of the core are from several hundreds to thousands, Q value is about tens, depending on the measured frequency.