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Minerals 2017, 7(12), 242; https://doi.org/10.3390/min7120242

Selective Recovery of Mushistonite from Gravity Tailings of Copper–Tin Minerals in Tajikistan

School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
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Received: 31 October 2017 / Revised: 1 December 2017 / Accepted: 4 December 2017 / Published: 7 December 2017
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Abstract

Tajikistan has abundant copper–tin resources. In this study, mineralogical analysis of copper–tin ores from the Mushiston deposit of Tajikistan indicates that tin mainly occurred in mushistonite, cassiterite, and stannite, while copper mainly occurred in mushistonite, malachite, azurite, and stannite. The total grades of tin (Sn) and copper (Cu) were 0.65% and 0.66%, respectively, and the dissemination size of copper–tin minerals ranged from 4 μm to over 200 μm. Coarse particles of copper–tin minerals were partially recovered by shaking table concentrators with a low recovery rate. Based on the mineralogical analysis, flotation recovery was used for the first time on the fine particles of copper–tin minerals, including mushistonite, from shaking table tailings. Single factor flotation experiments, open circuit flotation tests, and closed circuit flotation tests were performed to determine the optimized flotation conditions. Results indicated that benzohydroxamic acid (C6H5CONHOH) and lead nitrate could effectively recover the mushistonite, cooperating with other depressants. The final concentrate contained 13.28% Sn, with a recovery rate of 61.56%, and 18.51% Cu, with a recovery rate of 86.52%. This method proved effective for the exploitation and use of this type of copper–tin resource in Tajikistan. View Full-Text
Keywords: mushistonite; copper–tin tailings; flotation; benzohydroxamic acid mushistonite; copper–tin tailings; flotation; benzohydroxamic acid
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Sun, L.; Hu, Y.; Sun, W.; Gao, Z.; Tian, M. Selective Recovery of Mushistonite from Gravity Tailings of Copper–Tin Minerals in Tajikistan. Minerals 2017, 7, 242.

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