Optimal conditions for selective reduction process of Nickel Laterite Ore

8th Annual International Conference 2018 on Science and Engineering

工业技术（总论）

Nurjaman, F.^1 ; Sa'Adah, A.^2 ; Suharno, B.^2

Research Unit for Mineral Technology, Indonesian Institute of Sciences, Lampung

35361, Indonesia^1

Metallurgical and Materials Engineering Department, Faculty of Engineering Universitas Indonesia, Kampus Baru UI Depok, 16424, Indonesia^2

关键词: Effect of temperature;    Nickel laterite;    Optimal conditions;    Phase formations;    Reduction process;    Reduction reaction;    Reduction temperatures;    Selective reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/523/1/012068/pdf
DOI  :  10.1088/1757-899X/523/1/012068

学科分类：工业工程学

来源: IOP

【 摘 要 】

A low-grade nickel laterite ore from Indonesia was selected to investigate the effect of temperature and time of reduction upon the extraction of nickel through the selective reduction-magnetic separation process to produce the ferronickel. The nickel ore was mixed with5 wt.% of anthracite coal and 10 wt.% of sodium sulfate additive. The mixed ore was pelletized into 10-15 mm of diameter. A series of selective reduction processes were carried out into the pellet ores at various temperatures of 950-1150 C for 60-120 minutes. The optimal selective reduction parameters of nickel laterite ore were observed clearly. The experimental results indicated that the reduction reactions proceed more completely at a higher temperature and longer reduction time. The optimum of nickel grade and recovery in the ferronickel concentrate was obtained at the reduction temperature of 1150 C for 120 minutes, which was 8.45% and 72.1%, respectively. The increasing of temperatures and times of reduction process resulted in higher of troilite phase formation which suppressed the iron metallization and also increased the ferronickel particle size.