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The effect of pre-roasting on nickel extraction from limonite ore by acid leaching method

W. Dahani, I. G. N. B. S. Jaksa

2020ennickel extractionlimonite orepre-roastingacid leachingmineralogy

Abstract

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In this study, the effect of pre-roasting on leaching of limonitic laterite ore, obtained from Sorowako, South Sulawesi, Indonesia was investigated. The products were characterized by X-Ray Diffraction (XRD), X-ray Fluorescence (XRF), and Atomic Absorption Spectroscopy (AAS). The phase transformation of limonite minerals roasted was investigated by X-Ray Diffraction (XRD). The roasting experiment results show that there is a phase transformation process of dehydroxylation of goethite at roasting temperatures of 600° C. Pre-roasting of the limonite alters its mineralogical composition, thus making it more amenable to leaching. The leaching result of ores roasted contains higher Ni (4.80%) than raw ore (4.17%). The roasting temperature of 600°C appears to provide the maximum nickel recovery of 93.48%. In addition, the maximum nickel recovery is affected by the concentration of H2SO4. This process is one of the technical and economic developments of nickel extraction methods.

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Cite This Work

@article{330b5f26-58bd-4823-aaf9-785f33e58498,
  title={The effect of pre-roasting on nickel extraction from limonite ore by acid leaching method},
  author={W. Dahani and I. G. N. B. S. Jaksa},
  year={2020},
  language={en}
}
TY  - JOUR
TI  - The effect of pre-roasting on nickel extraction from limonite ore by acid leaching method
AU  - W. Dahani
AU  - I. G. N. B. S. Jaksa
PY  - 2020
LA  - en
ER  -

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