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作者机构：School of Metallurgical and Ecological Engineering University of Science and TechnologyBeijing Hebei Iron and Steel Co. Ltd.Tangshan Branch Tianjin Pipe Group Co. Ltd.
出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)
年 卷 期：2014年第21卷第10期
页 面：955-961页
核心收录：
学科分类：081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学]
基 金：support by Tangshan Iron & Steel Co.Ltd. China
主 题：laterites ore reduction magnetic separation thermodynamics fine particle metallurgy
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.
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