Optical mineralogy – Knowledge and References

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Optical Crystals

Published in Marvin J. Weber, and TECHNOLOGY, 2020

Classification of crystalline materials based on optical properties is well established in the field of optical mineralogy. Only natural occurring crystals that are transparent in the visible region of the electromagnetic spectrum are considered. Here we will adopt this basic framework of classification of optical materials with some modifications to include all man-made materials and to broaden the optical spectrum including both UV and IR transparent materials.

Application of a Floatex density separator for iron recovery from Pilbara iron ore plant rejects

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Journal Information

Published in Mineral Processing and Extractive Metallurgy Review, 2022

V. Nunna, S. Hapugoda, M. I. Pownceby, G. J. Sparrow

The head sample used in this work was a fine-grained, low-grade, iron ore tailing sample from the Pilbara region in Western Australia sourced using an online periodic time-controlled diverter sampler fixed in the tailings stream. A sub-sample was screened at 1.0 mm (to avoid plugging of the FDS underflow) and the −1.0 mm fraction was beneficiated with a FDS. Samples of the −2.0 mm head sample, screened fractions, and FDS products were dried and homogenized, using laboratory standard rotary splitters (16 and/or 12 bin) and Retsch 8-bottle rotary splitters to produce a representative sub-sample for chemical, mineralogical, and size-by-size analysis using X-ray Fluorescence (XRF) spectroscopy, optical mineralogy, and for electron beam-based analysis methods.