Effect of the first thermal stage temperature and retention time in two-stage thermal upgrading of low-grade nickel lateritic ore

2nd Mineral Processing and Technology International Conference

工业技术（总论）;矿业工程

Shofi, A.^1 ; Ramadini, C.^1 ; Samuel, R.^1 ; Nurjaman, F.^2 ; Suharno, B.^1 ; Subagja, R.^3

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

16424, Indonesia^1

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

35361, Indonesia^2

Research Center for Metallurgy and Material, Indonesian Institute of Sciences, South Tangerang, Banten, Indonesia^3

关键词: Iron recovery;    Lateritic ores;    Mineralogical compositions;    Nickel recovery;    Optimum temperature;    Reduction process;    Retention time;    Selective reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/478/1/012002/pdf
DOI  :  10.1088/1757-899X/478/1/012002

学科分类：工业工程学

来源: IOP

【 摘 要 】

Selective reduction process and magnetic separation of nickel lateritic ore wereconducted through the two-stage thermal upgrading processwith the addition of sodium sulphate and sodium chloride as the additives agent. Effect of the first thermal stage temperature has been investigated at various of temperature of 500, 600 and 700°C for 60 minutes and continued with the reduction process at temperature of 1050°C for 30 minutes. The mineralogical composition of the reduced samples was performed by XRD analysis. The optimum temperature was 500°C, which produced a concentrate withnickel grade of 2.98% and iron recovery of 40.17%. Effect of the first thermal stageretention time also has been investigated at temperature of 500°C for 30, 60, and 90 minutes, and continued with the reduction process at temperature of 1150°C for 60 minutes. The optimum temperature was 90 minutes, which produced a concentrate with 3.69% nickel grade, and 90.61% nickel recovery.