废锌锰电池制备锰锌铁氧体共沉淀粉料研究

STUDY ON THE PREPARTION OF MnZn FERRITE CO-PRECIPITATION POWDER WITH Zn-Mn WASTE DRY BATTERY

以废锌锰电池为主要原料,辅以少量的菱锰矿和废铁屑,经同时浸出、初步除杂、深度净化和共沉淀等过程,制备出纯度高、配比接近PC30铁氧体配方且混合均匀的共沉淀粉料.实验结果表明:在浸出温度80～95℃、搅拌速度120～180r/min、酸用量为理论用量的1.2～1.4倍和浸出时间3.0～4.0 h的条件下,铁、锰和锌的浸出率分别为92.02%、96.14%和98.34%;共沉淀粉料中铁、锰和锌的平均含量分别为41.41%、13.92%和4.49%,推算出Fe:Zn:Mn=69.2:23.3:7.5.完全符合PC30对粉料的要求.本研究既为高档锰锌软磁铁氧体的制备创造了很好的前提条件,同时对废锌锰电池的高价值资源化利用具有重要的现实意义.

Mn-Zn ferrite co-precipitation powder was prepared by the reaction of simultaneous leaching, deep purification and co-precipitation with waste Zn-Mn dry battery, waste scrap iron and pyrolusite as raw materials.The results indicate that the leaching rates of Mn,Zn and Fe were 92.02%,96.14% and 98.34%, respectively at the condition of temperature 80～95℃,the rotate rate 120～180r/min, and with the amount of H_2SO_4 being 1.2～1.4 times of its theoretical consumption and the leaching time 3.0～4.0 h.The average contents of main elements in the co-precipitation powder are Fe 41.41%,Mn 13.92% and Zn 4.49%,Fe∶Zn∶Mn=69.2∶23.3∶7.5,which can meet fully the demands on the preparation of PC30 ferrite.This study intends to provide a theoretical basis for the manufacture process of Mn-Zn ferrite powder; it is also having the important practical significance to the utilization of waste Zn-Mn dry battery.