红土镍矿富集镍和铁的焙烧、氢气还原和磁选分离 |
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作者姓名: | 高金涛 张颜庭 陈培钰 李士琦 |
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作者单位: | 1. 北京科技大学钢铁冶金新技术国家重点实验室, 北京 100083; |
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摘 要: | 对印尼红土镍矿的基础特性进行了系统的研究,发现矿石主要由蛇纹石和辉石组成,其中Ni元素主要以类质同象的形式取代Mg元素存在于蛇纹石中.在此基础上分别进行了红土镍矿焙烧、氢气还原、磁选分离镍和铁的一系列实验研究.红土镍矿与碳酸盐添加剂进行混合焙烧实现了Ni和Fe氧化物的释放;对焙烧产物进行氢气还原,还原产物中Ni和Fe元素以金属形态存在,Fe金属化率最高超过80%,远大于原矿还原产物中Fe的金属化率(4%-8%),且随着温度升高,Ni元素易与Fe结合生成Fe-Ni;磁选所得产物中Ni和TFe品位分别达到3%和20%,Fe和Ni的回收率分别达到80%和90%,初步实现Ni和Fe的富集.
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关 键 词: | 红土镍矿 焙烧 矿物还原 磁选分离 碳酸盐 |
收稿时间: | 2012-08-10 |
Enrichment of Ni and Fe from nickel laterite by calcination,hydrogen reduction and magnetic separation |
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Authors: | GAO Jin-tao ZHANG Yan-ting CHEN Pei-yu LI Shi-qi |
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Affiliation: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;2. Tianjin Pipe Group Co., Ltd., Tianjin 300301, China |
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Abstract: | Basic characteristics of Indonesia laterite nickel ore were systematically studied in this paper. It is found that the nickel laterite mainly consists of lizardite and enstatine. Most of Mg located in lizardite is replaced by Ni in isomorphism. A series of experiments were performed to investigate Ni and Fe enrichment from the nickel laterite by calcination, hydrogen reduction and magnetic separation. The results show that the release of Ni and Fe oxides is achieved by calcination of nickel laterite and carbonate addictive. When the calcinate is reduced by hydrogen, Ni and Fe elements are found in metallic form in reduction products, and the metallization rate of Fe is more than 80~, which is much higher than that of the raw nickel laterite ore (from 4% to 8%). As the temperature rises, Ni is easy to bond with Fe in the form of Fe-Ni. The mass fractions of Ni and TFe in magnetic separation products reach 3% and 20%, and the yielding rates of Fe and Ni reach 80% and 90%, respectively, meaning that preliminary extraction of Fe and Ni is achieved. |
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Keywords: | nickel laterite calcination ore reduction magnetic separation carbonates |
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