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CHARACTERIZATION OF SOLID RESIDUE FROM LEACHING NEW ZEALAND IRONSAND

M. Nusheh, A-H. Puichaud

2017encharacterizationhydrometallurgyironsandleachingsolid residuetitanomagnetite

Abstract

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Vanadium-bearing titanomagnetite ironsand deposits occur along a 480 km stretch of the west coast of New Zealand. In the present study, the leaching behaviour of NZ ironsand was investigated in hydrochloric acid (2 –10 M) solution at 50 –80°C for 2 h. The resulting leaching liquors exhibited Fe/V ratios in the range 150 –180. The distribution of trace element contaminants between solution and solid residue was investigated, and processing conditions have been determined for rapid and efficient dissolution of Fe, Ti and V into the leaching solution. In addition, mineralogical analysis of raw ironsand and leached residues was performed in order to study the leaching mechanism. Samples were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy (EDX), X-ray fluorescence spectroscopy, qualitative and quantitative X-ray diffraction and inductively coupled plasma mass spectrometry (ICP). Results indicate that the dominant dissolution process follows shrinking particle mechanism. However, ironsand particles containing ex-solution lamellae exhibited a different leaching behaviour compared to homogenous titanomagnetite particles.

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Cite This Work

@article{0c35013f-a39f-4b90-8877-261f8c4ea8cb,
  title={CHARACTERIZATION OF SOLID RESIDUE FROM LEACHING NEW ZEALAND IRONSAND},
  author={M. Nusheh and A-H. Puichaud},
  year={2017},
  language={en}
}
TY  - JOUR
TI  - CHARACTERIZATION OF SOLID RESIDUE FROM LEACHING NEW ZEALAND IRONSAND
AU  - M. Nusheh
AU  - A-H. Puichaud
PY  - 2017
LA  - en
ER  -

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