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Minerals 2017, 7(8), 145; https://doi.org/10.3390/min7080145

Recovery of Phosphate Minerals from Plant Tailings Using Direct Froth Flotation

Department of Mining & Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
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Received: 13 June 2017 / Revised: 2 August 2017 / Accepted: 9 August 2017 / Published: 12 August 2017
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Abstract

Wastes produced from the phosphate industry presents many challenges due to the high economic and environmental impacts involved with their disposal. However, the relative scarcity of high-grade phosphate ores has driven researchers to recover and recycle these valuable wastes (secondary sources). The goal of this study was to investigate the possibility of upgrading the P2O5 content in tailings produced from a phosphorous production plant using direct froth flotation. Characterization assays, including X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence (XRF), and mineral liberation analysis (MLA), were first conducted to identify the mineralogical and morphological characteristics of tailings samples and grain properties to better understand the behavior of the flotation feed. Flotation experiments were conducted using Denver D-12 in a 1-L flotation cell in the presence of sodium silicate (dispersant) and sodium oleate (collector). Several parameters, such as the solids content of the flotation pulp, pulp pH and flotation time, were investigated to optimize the recovery and grade of the concentrate products. Results obtained from this study indicated that the P2O5 content in plant tailings could be upgraded from 21.57% to 28.4% at >73% recovery. View Full-Text
Keywords: phosphate minerals; froth flotation; mineral liberation analysis; sodium silicate phosphate minerals; froth flotation; mineral liberation analysis; sodium silicate
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Alsafasfeh, A.; Alagha, L. Recovery of Phosphate Minerals from Plant Tailings Using Direct Froth Flotation. Minerals 2017, 7, 145.

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