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2018-04-11

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cc-by (c) Ahmad Hamid, S. et al., 2018
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/122983

Quantitative Mineralogical Comparison between HPGR and Ball Mill Products of a Sn-Ta Ore

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https://doi.org/10.3390/min8040151

Resum

The mineralogy and liberation characteristics of the comminuted Penouta leucogranite host of the Sn-Ta ore were determined. Grinding developed by a combination of high-pressure grinding rolls (HPGR) followed by a ball mill (BM) was compared with a single ball mill process. The mineral characteristics of the grinding products were analyzed using a Tescan Integrated Mineralogical Analyzer (TIMA-X) and X-ray powder diffraction (XRD). The ore contains 103 ppm of Ta and is mainly composed of quartz, albite, microcline, muscovite, and kaolinite. Nb, Ta-rich minerals are columbite-(Mn) and tantalite-(Mn), as well as minor microlite and wodginite. The liberation in the product is high in the size fraction of less than 250 m (51-52 wt % for columbite-group minerals (CGM) and 74-80 wt % for cassiterite) and reduced in larger particles (8.8-17 wt % for CGM and 28-37 wt % for cassiterite). The recovery in the 􀀀250 m fraction was high, while in the larger fraction it is limited, remaining up to 80 ppm in some tailings. The combined use of HPGR and a BM reduces the particle size distribution of the product and, thus, increases the liberation of the ores. Smaller fractions can be treated directly using gravity methods; however, particles of a size greater than +250 m should be ground more.

Matèries

Mineralogia, Jaciments minerals

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Mineralogy, Mineral deposits

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Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

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AHMAD HAMID, Sarbast, ALFONSO ABELLA, María pura, ANTICOI, Hernan, GUASCH, Eduard, OLIVA, Josep, DOSBABA, Marek, GARCIA VALLÈS, Maite, CHUGUNOVA, Marina. Quantitative Mineralogical Comparison between HPGR and Ball Mill Products of a Sn-Ta Ore. _Minerals_. 2018. Vol. 8, núm. 4, pàgs. 151. [consulta: 25 de febrer de 2026]. ISSN: 2075-163X. [Disponible a: https://hdl.handle.net/2445/122983]

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