Ferronickel enrichment by fine particle reduction and magnetic separation from nickel laterite ore  

作　　者：Xiao-hui Tang Run-zao Liu Li Yao Zhi-jun Ji Yan-ting Zhang Shi-qi Li 

机构地区：[1]School of Metallurgical and Ecological Engineering, University of Science and Technology,Beijing [2]Hebei Iron and Steel Co. Ltd.,Tangshan Branch [3]Tianjin Pipe Group Co. Ltd.

出　　处：《International Journal of Minerals,Metallurgy and Materials》2014年第10期955-961,共7页矿物冶金与材料学报（英文版）

基　　金：support by Tangshan Iron & Steel Co.Ltd.,China

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℃）. Magnetic separa- tion 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 con- sists of serpentine, hortonolite, and goethite. During the reduction process, the grade of nickel and iron in the products increases with in- creasing reduction temperature. Although a higher temperature is more favorable for reduction, the temperature exceeding 1000℃ 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.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℃）. Magnetic separa- tion 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 con- sists of serpentine, hortonolite, and goethite. During the reduction process, the grade of nickel and iron in the products increases with in- creasing reduction temperature. Although a higher temperature is more favorable for reduction, the temperature exceeding 1000℃ 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.

关 键 词：LATERITES ore reduction magnetic separation thermodynamics fine particle metallurgy 

分 类 号：TD954[矿业工程—选矿]