磷酸铵强化硫化蓝铜矿及其对浮选的影响

张谦; 文书明; 丰奇成; 王涵

doi:10.1007/s12613-021-2379-y

Volume 29 Issue 6

Jun. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(6): 1150-1160

Qian Zhang, Shuming Wen, Qicheng Feng, and Han Wang, Enhanced sulfidization of azurite surfaces by ammonium phosphate and its effect on flotation, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1150-1160. https://doi.org/10.1007/s12613-021-2379-y

Cite this article as:

Qian Zhang, Shuming Wen, Qicheng Feng, and Han Wang, Enhanced sulfidization of azurite surfaces by ammonium phosphate and its effect on flotation, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1150-1160. https://doi.org/10.1007/s12613-021-2379-y

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研究论文

磷酸铵强化硫化蓝铜矿及其对浮选的影响

昆明理工大学国土资源工程学院省部共建复杂有色金属资源清洁利用国家重点实验室，昆明 650093，中国

通讯作者:
丰奇成 E-mail: fqckmust@163.com

文章亮点

(1) 蓝铜矿表面经(NH₄)₃PO₄预处理后，其浮选回收率明显增加。

(2) (NH₄)₃PO₄增强了蓝铜矿表面的硫化效果，促进了矿物表面硫化产物的形成。

(3) (NH₄)₃PO₄的添加导致蓝铜矿表面更多的Cu(II)组分被还原为Cu(I)组分。

中文摘要

蓝铜矿是一种重要的氧化铜矿物，采用常规的硫化–黄药浮选法回收蓝铜矿时浮选效果不理想。本研究通过微浮选试验、飞行时间二次离子质谱(ToF-SIMS)、X射线光电子能谱(XPS)、Zeta电位、接触角、傅里叶变换红外(FT-IR)光谱和紫外–可见光(UV–Vis)光谱检测研究了(NH₄)₃PO₄和Na₂S对蓝铜矿表面的强化硫化效果。微浮选试验表明，(NH₄)₃PO₄和Na₂S同时加入可提高蓝铜矿的可浮性；ToF-SIMS和XPS分析表明，与蓝铜矿–Na₂S体系相比，(NH₄)₃PO₄和Na₂S处理后的蓝铜矿表面硫组分含量较高，Cu(I)组分含量也得到增加；硫化前采用(NH₄)₃PO₄预处理后，蓝铜矿表面Zeta电位呈负偏移，且矿物表面的接触角增大，即(NH₄)₃PO₄的加入增强了蓝铜矿表面的硫化，促进了黄药的吸附；FT-IR和UV–Vis分析表明，在蓝铜矿浮选过程中，(NH₄)₃PO₄的加入增加了矿物表面黄药的有效吸附量，降低了黄药的使用量。因此，(NH₄)₃PO₄有利于蓝铜矿的硫化浮选。

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Research Article

Enhanced sulfidization of azurite surfaces by ammonium phosphate and its effect on flotation

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Abstract

Abstract

Although azurite is one of the most important copper oxide minerals, the recovery of this mineral via sulfidization–xanthate flotation is typically unsatisfactory. The present work demonstrated the enhanced sulfidization of azurite surfaces using ammonia phosphate ((NH₄)₃PO₄) together with Na₂S, based on micro-flotation experiments, time-of-flight secondary ion mass spectrometry (ToF-SIMS), X-ray photoelectron spectroscopy (XPS), zeta-potential measurements, contact angle measurements, Fourier-transform infrared (FT-IR) spectroscopy, and ultraviolet–visible (UV–Vis) spectroscopy. Micro-flotation experiments showed that the floatability of azurite was increased following the simultaneous addition of (NH₄)₃PO₄ and Na₂S. ToF-SIMS and XPS analyses demonstrated the formation of a high content of S species on the azurite surface and an increase in the number of Cu(I) species after exposure to (NH₄)₃PO₄ and Na₂S, compared with the azurite–Na₂S system. The zeta potential of azurite particles was negatively shifted and the contact angle on the azurite surface was increased with the addition of (NH₄)₃PO₄ prior to Na₂S. These results indicate that treatment with (NH₄)₃PO₄ enhances the sulfidization of azurite surfaces, which in turn promotes xanthate attachment. FT-IR and UV–Vis analyses confirmed that the addition of (NH₄)₃PO₄ increased the adsorption of xanthate with reducing the consumption of xanthate during the azurite flotation process. Thus, (NH₄)₃PO₄ has a beneficial effect on the sulfidization flotation of azurite.
- azurite;
- ammonium phosphate;
- enhanced sulfidization;
- reagent adsorption;
- flotation enhancement

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