北京科技大学学报2011，Vol.33Issue(3)：270-275,6.
红土镍矿含碳球团深还原-磁选富集镍铁工艺
Enrichment of nickel and iron from nickel laterite ore/coal composite pellets by deep reduction and magnetic separation
林重春 1张建良 1黄冬华 1毛瑞 2邵久刚1
作者信息
- 1. 北京科技大学冶金与生态工程学院,北京,100083
- 2. 北京科技大学期刊中心,北京,100083
- 折叠
摘要
Abstract
Iron and nickel minerals in a nickel laterite ore were deeply reduced to metallic iron and nickel, and then they were magnetic-separated for the enrichment of an iron-nickel concentrate. The reductive roasting parameters were optimized and the optimal conditions are obtained as the C/O atomic ratio of 1.3, the reduction time of 80 min, the CaO content of 10％, and the reduction temperature of 1 300 ℃. Under these optimal conditions, the grades of nickel and total iron in the iron-nickel concentrate are 5.17％ and 65.38％ , and the recovery rates of nickel and iron are 89. 29％ and 91.06％ , respectively. The deeply reduced ore and the magnetic separated concentrate were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) , and energy dispersive Xray spectrometer (EDS). The results show that metal particles of ferro-nickel are found in the reduced ore. Nickel is dissolved in ferronickel, and a little portion of iron exists as FeO. A large amount of gangue is removed by magnetic separation, and the concentrate contains iron, ferro-nickel, FeO, and little CaO·MgO·2SiO2.关键词
镍矿/磁选分离/回收/直接还原Key words
nickel ores/ magnetic separation/ recovery/ direct reduction分类
矿业与冶金引用本文复制引用
林重春,张建良,黄冬华,毛瑞,邵久刚..红土镍矿含碳球团深还原-磁选富集镍铁工艺[J].北京科技大学学报,2011,33(3):270-275,6.
