Application of Hydrogen for the Reduction of Bauxite Mineral

5th National Conference on Processing and Characterization of Materials

Parhi, B.R.^1 ; Sahoo, S.K.^1 ; Bhoi, B.^2 ; Satapathy, B.K.^3 ; Paramguru, R.K.^4

Department of Metallurgical and Materials Engg, NIT Roukela, Odisha

769008, India^1

Institute of Minerals and Materials Technology (IMMT), Odisha, Bhubaneswar

751013, India^2

R and D Centre, National Aluminium Company Ltd (NALCO), Odisham, Bhubaneswar

751013, India^3

Department of Mechanical Engineering, Kalinga Institute of Industrial Technology (KIIT), Odisha, Bhubaneswar

751024, India^4

关键词: Acid leaching;    Bauxite;    Hydrogen plasmas;    Molecular hydrogen;    Reduction process;    Time-periods;    X-ray diffraction techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/115/1/012009/pdf
DOI  :  10.1088/1757-899X/115/1/012009

来源: IOP

【 摘 要 】

Reduction of oxides present in bauxite through hydrogen was investigated in the present study. The bauxite samples were subjected to reduction through molecular hydrogen and hydrogen plasma at 650oC and 800oC with different flow rates of hydrogen for different time periods respectively. The samples, after the reduction processes, were characterized by X-ray diffraction technique and chemical analysis. It was observed that the oxides of iron present in bauxite were only undergone through reduction while other oxides remain unreduced. An attempt was then made to separate pure Al2O3present in bauxite samples through acid leaching process.