三明炼钢粉尘的基本物性及酸浸回收锌的实验研究  

Basic Characterization and Recovery of Zinc by Acid Leaching of Steelmaking Dust from Sanming Iron and Steel Works

作　　者：徐瑞[1] 杨丽梅[1] 黄松涛[1] 徐政[1] 

机构地区：[1]北京有色金属研究总院生物冶金国家工程实验室,北京100088

出　　处：《过程工程学报》2013年第1期48-54,共7页The Chinese Journal of Process Engineering

基　　金："十一五"国家科技支撑计划基金资助项目(编号:2011BAE23B05)

摘　　要：采用化学分析、XRD、湿式筛分、显微镜观察、SEMEDS等方法系统研究了三明炼钢粉尘的元素组成、粒度分布、物相、表面形貌及元素分布等基本物性;并进行其酸性浸出条件实验,考察了初始酸浓度、MnO2加入量、温度、浸出时间等因素对矿浆终点pH值、过滤性能及Zn,Fe,SiO2浸出率的影响.结果表明,在25℃、初始酸浓度26.6g/L、加MnO20.4g、浸出120min后,矿浆pH=3.5～3.7,粉尘中Zn的浸出率达98%,而Fe和SiO2浸出率分别为0.22%和9%,且矿浆的过滤性能良好.The basic characterization of steelmaking dust from Shanming Iron and Steel Works, such as chemical composition, granular size distribution, phase, surface topography and elemental distribution were analyzed by using chemical analysis, XRD, wet screening, microscopic examination and SEM-EDS. And through the acid leaching condition experiments, the effects of initial acid concentration, MnO2 addition, temperature and leaching time on the final pH value and filtering performance of leaching slurry, and the leaching rate of Zn, Fe and SiO2 were investigated. The results showed that in under the conditions of temperature 25℃, initial acid concentration 26.6 g/L, MnO2 addition 0.4 g, leaching after 120 min and slurry pH value in 3.5-3.7, the leaching rate of Zn reached up to 98%, but the leaching rates of Fe and SiO2 were 0.22% and 9% respectively, in the same time the filtering performance was good.

关 键 词：炼钢粉尘 物性分析 酸性浸出 ZN 

分 类 号：TF813[冶金工程—有色金属冶金]