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Selective flotation separation of andalusite and quartz and its mechanism

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Abstract

The separation of andalusite and quartz was investigated in the sodium oleate flotation system, and its mechanism was studied by solution chemical calculation, zeta-potential tests, Fourier transform infrared spectroscopic (FTIR), and X-ray photoelectron spectroscopic (XPS). The flotation tests results show that FeCl3·6H2O has a strong activation effect on andalusite and quartz and citric acid has a strong inhibitory effect on activated quartz, thus increasing the floatability difference between quartz and andalusite when the pulp pH is approximately 8. The FTIR, Zeta potential, and XPS analyses combined with the chemical calculation of flotation reagent solutions demonstrate that Fe forms hydroxide precipitates on the surface of andalusite and quartz and that oleate anions and metal ions adsorb onto the surface of the minerals. The elements Al and Fe can be chemically reacted. The anions in citric acid have different degrees of dissolution of Fe on the andalusite and quartz surfaces, thereby selectively eliminating the activation of the elemental Fe on andalusite and quartz and increasing the floatability of andalusite, leading to a better separation effect between andalusite and quartz.

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Acknowledgement

This work was financially supported by the State Key Laboratory of Mineral Processing of BGRIMM Technology Group, China (No. BGRIMM-KJSKL-2017-11).

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Authors and Affiliations

  1. College of Resources and Civil Engineering, Northeastern University, Shenyang, 110000, China

    Yan-ping Niu & Wan-zhong Yin

  2. State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing, 100160, China

    Yan-ping Niu, Chuan-yao Sun & Xing-rong Zhang

  3. The Research Center of Experimental Testing for Geology and Minerals in Heilongjiang Province, Harbin, 150000, China

    Yan-ping Niu & Xu Zhang

  4. Heilongjiang Mining Group Co. Ltd., Harbin, 150000, China

    Hong-feng Xu

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  1. Yan-ping Niu
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  2. Chuan-yao Sun
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  3. Wan-zhong Yin
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  4. Xing-rong Zhang
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  5. Hong-feng Xu
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Correspondence to Wan-zhong Yin.

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Niu, Yp., Sun, Cy., Yin, Wz. et al. Selective flotation separation of andalusite and quartz and its mechanism. Int J Miner Metall Mater 26, 1059–1068 (2019). https://doi.org/10.1007/s12613-019-1842-5

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  • DOI: https://doi.org/10.1007/s12613-019-1842-5

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