Ferronickel enrichment by fine particle reduction and magnetic separation from nickel laterite ore
Ferronickel enrichment by fine particle reduction and magnetic separation from nickel laterite ore
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DOI：
10.1007/s12613-014-0995-5
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Xiaolong Tang;Run-zao Liu;L. Yao;Zhijun Ji;Yan-ting Zhang;Shi-qi Li
中科院分区：
文献类型：
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作者：
Xiaolong Tang;Run-zao Liu;L. Yao;Zhijun Ji;Yan-ting Zhang;Shi-qi Li
采用还原-磁选法从红土镍矿中富集提取镍铁。使用氢气和一氧化碳作为还原剂在不同温度（700-1000°C）下进行还原实验。使用SLon-100循环脉动磁力分离器（1.2T）进行还原产物的磁力分离。红土镍矿的化学成分分析表明，红土镍矿的全铁含量为22.50wt%，全镍含量为1.91wt%。其矿物组成主要为蛇纹石、针铁矿和针铁矿。在还原过程中，产物中镍和铁的品位随还原温度的升高而增加。虽然较高的温度更有利于还原，但超过1000°C的温度会导致产品烧结，防止磁性分离。经磁选后，镍和铁的最高总含量分别为5.43wt%和56.86wt%，回收率分别为84.38%和53.76%。
Ferronickel enrichment and extraction from nickel laterite ore were studied through reduction and magnetic separation. Reduction experiments were performed using hydrogen and carbon monoxide as reductants at different temperatures (700–1000°C). Magnetic separation of the reduced products was conducted using a SLon-100 cycle pulsating magnetic separator (1.2 T). Composition analysis indicates that the nickel laterite ore contains a total iron content of 22.50wt% and a total nickel content of 1.91wt%. Its mineral composition mainly consists of serpentine, hortonolite, and goethite. During the reduction process, the grade of nickel and iron in the products increases with increasing reduction temperature. Although a higher temperature is more favorable for reduction, the temperature exceeding 1000°C results in sintering of the products, preventing magnetic separation. After magnetic separation, the maximum total nickel and iron concentrations are 5.43wt% and 56.86wt%, and the corresponding recovery rates are 84.38% and 53.76%, respectively.