利用钢铁厂烟尘制备锰锌软磁铁氧体的工艺研究  

Preparation of Mn-Zn Soft Magnetic Ferrite from Steel Plant Dust

作　　者：彭长宏[1] 梁力平 李基森 慕思国[1] 唐谟堂[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]广东风华高新科技股份有限公司,广东肇庆526020

出　　处：《磁性材料及器件》2006年第5期37-41,共5页Journal of Magnetic Materials and Devices

基　　金：863计划课题(2004AA649220)

摘　　要：以钢厂烟尘、碳酸锰矿和铁屑为原料，经同时浸出、初步除杂、复盐沉淀深度净化、共沉淀和铁氧体工艺等过程，制备出锰锌软磁铁氧体产品。实验结果表明，Fe、Mn和Zn的浸出率分别为88．61％、96．20％和85．85％。在温度90℃、时间1．0h、溶液pH=3．5和氟化铵过量2．0倍的条件下，Ca^2＋和Mg^2＋去除率的平均值分别为92．98％及89．95％。复盐沉淀的优化夸件为游离硫酸铵浓度2.0-2．5mol／L，溶液pH=1．5-2．5，室温和沉淀时间1．0-1．5h。共沉淀粉中主成分和杂质成分的含量分别为Fe43.3％、Mn12．89％、Zn3．38％、Ca0．041％、Mg0．078％、Al0．029％、Si0．012％、Cu0．0016％、Pb0．0043％、Cd0．00018％。铁氧体产品的磁性能接近日本TDK公司PC30指标。Mn-Zn soft ferrite was prepared from steel plant dust, manganese carbonate ore and scrap iron by the reaction of simultaneous leaching, primary purification, deep-purification, co-precipitation and ferrite technology. The experimental results demonstrate that the leaching rate of Fe, Mn and Zn are 88.61%, 96.20% and 85.85%, respectively. Conditions of fluorination precipitation process for the removal of Ca^2＋ and Mg^2＋ are as following： the consume weight of NH4F is as 2.0 times as theoretic consume, precipitation time is 1.0 h, reaction temperature is 90℃ and the value of pH is 3.5. Under these conditions, the average removal rate of Ca^2＋ and Mg^2＋ are 92.98% and 89.95%. The key factors of double salt precipitation process are the excess concentration of （NH4）2SO4 and pH value of the solution. Conditions of double salt precipitation process are as follows, the value of pH is 1.5-2.5, the excess concentration of （NH4）2SO4 is 2.0-2.5 mol/L, the precipitation time is 1.0-1.5 h and the reaction temperature is room temperature. In co-precipitation powders, the contents of main elements and impurity elements are Fe 43.3%, Mn 12.89%, Zn 3.38%, Ca 0.041%, Mg 0.078%, Al 0.029%, Si 0.012%, Cu 0.0016%, Pb 0.0043% and Cd 0.00018%, respectively. The property of Mn-Zn soft ferrite gained from steel plant dust approaches to that of TDK PC30.

关 键 词：钢厂烟尘 锰锌软磁铁氧体 同时浸出 净化 共沉淀 铁氧体工艺 

分 类 号：X756[环境科学与工程—环境工程] TM277.1[一般工业技术—材料科学与工程]