文档介绍：第 21 卷第 5 期中国有色金属学报 2011 年 5 月
The Chinese Journal of Nonferrous Metals May 2011
文章编号:1004-0609(2011)05-1165-06

铜渣中铁组分的直接还原与磁选回收

杨慧芬,景丽丽,党春阁

(北京科技大学土木与环境工程学院,北京 100083)

摘要:以褐煤为还原剂,采用直接还原−磁选方法对含铁 %(质量分数)的水淬铜渣进行回收铁的研究。在
原料分析和机理探讨基础上,提出影响铜渣中铁回收效果的主要工艺参数,并进行试验确定。结果表明:在铜渣、
褐煤和 CaO 质量比为 100:30:10,还原温度为 1 250 ℃,焙烧时间为 50 min,再磨细至 85%的焙烧产物粒径小于
43µm 的最佳条件下,可获得铁品位为 %、回收率为 %的直接还原铁粉;经直接还原后,铜渣中的铁橄
榄石及磁铁矿已转变成金属铁,所得金属铁颗粒的粒度多数在 30 µm 以上,且与渣相呈现物理镶嵌关系,易于通
过磨矿实现金属铁的单体解离,从而用磁选方法回收其中的金属铁。
关键词: 铜渣;直接还原;磨矿;磁选;金属铁
中图分类号:TF09,X758 文献标志码:A

Iron recovery from copper-slag with
lignite-based direct reduction followed by ic separation

YANG Hui-fen, JING Li-li, DANG Chun-ge

(Civil and Environmental Engineering School,University of Science and Technology Beijing, Beijing 100083, China)

Abstract: In order to recycle iron from copper slag with total iron content (TFe) of %(mass fraction), a technique
with lignite-based direct reduction followed by ic separation was presented. After analysis of chemical
composition and crystalline phase, according to experimental mechanism, the tests for studying the effects of different
parameters on the recovery of iron were carried out. The results show that the optimum parameters are proposed as
follows: the mass ratio of copper slag/lignite/CaO is 100:30:10, the red