Effect of sodium sulfate and sodium chloride in two-stage thermal upgrading of low-grade Nickel Lateritic Ore

8th Annual International Conference 2018 on Science and Engineering

工业技术（总论）

Suharno, B.^1 ; Ramadini, C.^1 ; Shaleh, R.H.^1 ; Shofi, A.^1 ; Nurjaman, F.^2

Metallurgical and Materials Engineering Department, Faculty of Engineering Universitas Indonesia, Kampus Baru UI Depok, 16424, Indonesia^1

Indonesian Institute of Science, Lampung, Indonesia^2

关键词: Lateritic ores;    Mineralogical compositions;    Nickel laterite;    Nickel recovery;    Optimum composition;    Selective reduction;    Thermal mechanisms;    Thermal process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/523/1/012062/pdf
DOI  :  10.1088/1757-899X/523/1/012062

学科分类：工业工程学

来源: IOP

【 摘 要 】

Selective reduction process and magnetic separation of nickel lateritic ore were conducted through the two-stage thermal mechanism with the addition of sodium sulfate and sodium chloride as the additives agent. The first thermal process was pre-heating at the temperature of 500C and holding for 90 minutes. Afterward, the reduction continued at the temperature of 1150C for the same holding time. The mineralogical composition of the reduced samples was determined by XRD. The microstructure of reduced nickel laterite ore was also examined using SEM-EDS. The optimum composition of the additive was the combination of 10% Na2SO4 + 10% NaCl, which produced a concentrate with 5.52% and 85.89% for nickel grade and nickel recovery, respectively.