Study on Separation of Niobium and Iron from Low Grade Niobium Ore
Study on Separation of Niobium and Iron from Low Grade Niobium Ore
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DOI：
10.4028/www.scientific.net/amr.524-527.2044
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
Bo Zhang;M. Jiang
中科院分区：
文献类型：
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作者：
Bo Zhang;M. Jiang
采用还原焙烧-磁选工艺流程，对低品位铀矿中的铌铁分离进行了研究。进行了还原焙烧和磁选试验，考察了不同焙烧温度和煤粉加入量对分选效果的影响。结果表明，在实现Nb和Fe分离的同时，Nb在磁尾矿中得到了富集化。当焙烧温度超过1150℃时，磁尾矿中Nb的主要矿物相由(Ce，Nd)NbTiO5转变为NbC。在1050℃下加入37.5%的煤粉进行磁选焙烧后，还原铁的w(T.Fe)为86.11%，金属化率为87.6%，铁得率为77.4%。同时，磁尾矿w(Nb2O5)为7.35%，是低品位铀矿的2.4倍，Nb2O5得率为98.1%。
The separation of niobium and iron from the low grade niobium ore was researched by the technology process of reductive roasting and magnetic separation. Experiments of reductive roasting and magnetic separation were carried out in order to investigate the separation effect at different conditions of roasting temperature and addition amount of coal powders. The results show that the separation of niobium and iron can be realized, meanwhile the niobium can be enriched in the magnetic tailings. The main mineral phase of niobium in magnetic tailings changes into NbC from (Ce,Nd)NbTiO5 when the roasting temperature exceeds 1150°C. By magnetic separation after roasting with adding 37.5% coal powders at 1050°C, w(T.Fe) of the reduced iron is 86.11%, the percentage metallization is 87.6%, and the yield ratio of iron is 77.4%. Meanwhile, w(Nb2O5) of the magnetic tailings is 7.35% which is 2.4 times higher than low grade niobium ore, and the yield ratio of niobium is 98.1%.