用锌焙砂中浸渣制备锰锌铁氧体共沉淀粉  

Preparation of Mn-Zn ferrite coprecipitation powders from neutral leached residue of zinc calcine

作　　者：彭长宏[1] 张秀峰[1] 程晓苏[1] 陈带军[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2009年第6期1494-1498,共5页Journal of Central South University:Science and Technology

基　　金：国家高技术研究发展计划项目(2006AA06Z373);广东省科技计划项目(2008A080403007-03)

摘　　要：以湿法炼锌过程中的中浸渣和挥发窑渣为原料,经浸出、还原、净化和共沉淀等过程制备软磁铁氧体所需的锰锌铁氧体共沉淀粉料。确定浸出工艺条件、硫化沉淀和氟化沉淀工艺条件。实验结果表明,中浸渣的最佳浸出工艺条件如下:温度为90～95℃,搅拌速度为200r/min,硫酸用量为理论用量的1.15倍,时间为2.5h,液固比为4-1;制得的共沉淀粉料中铁、锰和锌的平均含量比例与理论配方较符合,尤其是共沉淀粉料中各杂质元素含量很低,各杂质成分含量分别为Ca0.0180%,Mg0.0085%,Si0.0038%,Al0.0078%,Ni0.0170%,Pb0.0012%,Cu0.0033%,Cr0.0028%及Cd0.0002%,达到锰锌软磁铁氧体材料对粉料的要求。Mn-Zn ferrite coprecipitation powders were prepared from neutral leached residues and kiln slags in zinc hydrometallurgy after the processes of leaching, reduction, purification and coprecipitation. The optimum conditions of leaching, sulfide precipitation and fluorination precipitation were determined. The best leaching conditions are as follows： the leaching temperature 90-95 ℃, the stirring speed 200 r/min, the excess coefficient of sulfuric acid 1.15, the leaching time 2.5 h, and the ratio of liquid to solid 4：1.The results show that the content ratio of Fe, Mn and Zn of the coprecipitation powders accords well with theoretical prescription, especially with a low impurity content. The contents of impurity elements are as follows： Ca 0.018 0%, Mg 0.008 5%, Si 0.003 8%, Al 0.007 8%, Ni 0.017 0%, Pb 0.001 2%, Cu 0.003 3%, Cr 0.002 8%, Cd 0.000 2%, respectively, which can meet the qualification of powders being used in Mn-Zn soft magnetic ferrite.

关 键 词：锰锌铁氧体 共沉淀粉 中浸渣 挥发窑渣 

分 类 号：TF803.2[冶金工程—有色金属冶金]