Ferronickel enrichment by fine particle reduction and magnetic separation from nickel laterite ore
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第10期
论文作者：Xiao-hui Tang Run-zao Liu Li Yao Zhi-jun Ji Yan-ting Zhang Shi-qi Li
文章页码：955 - 961
摘 要：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.
Xiao-hui Tang1，Run-zao Liu1，Li Yao1,2，Zhi-jun Ji1，Yan-ting Zhang1,3，Shi-qi Li1
1. School of Metallurgical and Ecological Engineering, University of Science and Technology,Beijing2. Hebei Iron and Steel Co. Ltd.,Tangshan Branch3. Tianjin Pipe Group Co. Ltd.
摘 要：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.
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