Leaching of silicon from ferronickel (FeNi) smelting slag with sodium hydroxide solution at atmospheric pressure

Mineral Processing and Technology International Conference 2017

Mufakhir, F.R.^1,2 ; Mubarok, M.Z.^1 ; Ichlas, Z.T.^1,3

Department of Metallurgical Engineering, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung

40132, Indonesia^1

Research Unit for Mineral Technology, Indonesian Institute of Sciences (LIPI), Lampung

35361, Indonesia^2

Department of Mining Engineering and Metallurgical Engineering, Western Australian School of Mines, Curtin University, Kalgoorlie

6430, Australia^3

关键词: Diffusion-controlled process;    Leaching agents;    Leaching behavior;    Leaching kinetics;    Operating temperature;    Shrinking core model;    Slurry density;    Sodium hydroxide solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/285/1/012003/pdf
DOI  :  10.1088/1757-899X/285/1/012003

来源: IOP

【 摘 要 】

The present paper reports the leaching behavior of silicon from ferronickel slag under atmospheric pressure using sodium hydroxide solution. The effect of several experimental variables, namely concentration of leaching agent, operating temperature, stirring speed, and slurry density was investigated. The leaching kinetic was also investigated by using shrinking core model. It was determined that leaching of silicon from the slag was controlled by diffusion through product layer, although the activation energy was found to be 85.84 kJ/mol, which was unusually high for such a diffusion-controlled process.