Synergistic Mechanism of Combined Inhibitors on the Selective Flotation of Arsenopyrite and Pyrite

The selective action mechanism of sodium butyl xanthate (BX), ammonium salt (NH4 +), and sodium m-nitrobenzoate (m-NBO) on pyrite and arsenopyrite was examined by experiments and quantum chemistry. The experiments show that under alkaline conditions, ammonium salt (NH4 +) and m-NBO can have a strong...

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Published in:ACS omega 2022-02, Vol.7 (7), p.6302-6312
Main Authors: Sun, Xiaohao, Wu, Bozeng, Deng, Jiushuai, Qiu, Hongxin, Hu, Mingzhen, Cai, Jiaozhong, Jin, Xiaoli, Xu, Hongyang
Format: Article
Language:English
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Summary:The selective action mechanism of sodium butyl xanthate (BX), ammonium salt (NH4 +), and sodium m-nitrobenzoate (m-NBO) on pyrite and arsenopyrite was examined by experiments and quantum chemistry. The experiments show that under alkaline conditions, ammonium salt (NH4 +) and m-NBO can have a strong inhibitory effect on arsenopyrite. At pH 11, the recovery rate of arsenopyrite reduces to 16%. The presence of ammonium salt (NH4 +) and m-NBO reduces the adsorption energy of BX on arsenopyrite to ΔE = −23.23 kJ/mol, which is far less than the adsorption energy on the surface of pyrite, ΔE = −110.13 kJ/mol. The results are helpful to understand the synergistic mechanism of the agent on the surface of arsenopyrite and pyrite, thus providing a reference for the selective separation of arsenopyrite.
ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.1c06902