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The Chinese Journal of Process Engineering ›› 2024, Vol. 24 ›› Issue (12): 1442-1452.DOI: 10.12034/j.issn.1009-606X.224116

• Research Paper • Previous Articles     Next Articles

The mechanism study on flotation of ilmenorutile based on Bayan Obo niobium-bearing minerals with 1-hydroxyoctane-1,1-bisphosphonic acid as collector

Wei XU1,2#,  Min ZHANG1,2#,  Hongdong YU1,2,  Fangfang CHEN1,2,3,4*,  Guan PENG2,3,  Jing LI2   

  1. 1. School of Rare Earths, University of Science and Technology of China, Hefei, Anhui 230026, China 2. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, Jiangxi 341119, China 3. Key Laboratory of Rare Earths, Chinese Academy of Sciences, Ganzhou, Jiangxi 341119, China 4. CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2024-03-26 Revised:2024-05-17 Online:2024-12-28 Published:2024-12-27

1-羟基辛叉-1,1-双膦酸捕收剂对白云鄂博铌矿中铌铁金红石的浮选机理研究

徐伟1,2#， 张敏1,2#， 于宏东1,2， 陈芳芳1,2,3,4*， 彭冠2,3， 李敬2   

  1. 1. 中国科学技术大学稀土学院，安徽 合肥 230026 2. 中国科学院赣江创新研究院，江西 赣州 341119 3. 中国科学院稀土重点实验室，江西 赣州 341119 4. 中国科学院过程工程研究所，中国科学院绿色过程与工程重点实验室，战略金属资源绿色循环利用国家工程研究中心，北京 100190
  • 通讯作者: 陈芳芳 ffchen@gia.cas.cn
  • 基金资助:
    国家重点研发项目;国科学院重点部署项目;中国科学院赣江创新研究院自主部署项目

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Abstract: This study proposed an improved method for synthesizing 1-hydroxyoctane-1,1-bisphosphonic acid (HOBA), and ilmenorutile (one of the important representative niobium-bearing minerals in Bayan Obo) was selected as the research object. Compared with octyl hydroxamic acid (OHA), the flotation mechanism of the synthetic ilmenorutile and HOBA is systematically investigated through contact angle, Zeta potential, FTIR, SEM-EDS, and XPS methods. The results show that under acidic conditions, HOBA can be chelated with ions on the surface of ilmenorutile and stably adsorbed on the surface of ilmenorutile through chemical adsorption, which could improve the floatability of ilmenorutile. Its selectivity for ilmenorutile was significantly better than that of OHA, well explaining the superior flotation results of HOBA over OHA for the actual niobium-bearing minerals in Bayan Obo. Solution chemistry calculation provided more information for the interaction of HOBA and ions on the surface of ilmenorutile in the flotation process, and the reasons for the inhibition effect of Ce3+ and the synergetic enhancement effect of Pb2+ in the interaction between HOBA and ilmenorutile were further discussed. This study indicates that HOBA can serve as an effective collector for ilmenorutile and other niobium-bearing minerals in Bayan Obo under appropriate pH range and ion conditions, and the optimization of its synthesis route provide the possibility for industrial application.

Key words: 1-hydroxyoctane-1,1-bisphosphonic acid, Bayan Obo niobium-bearing minerals, ilmenorutile, flotation mechanism

摘要： 本研究提出了一种改进的1-羟基辛叉-1,1-双膦酸(HOBA)合成方法，选取铌铁金红石(一种重要的白云鄂博代表性含铌矿物)作为研究对象，并对比研究了辛基异羟肟酸(OHA)。通过接触角、Zeta电位、傅里叶变换红外光谱(FTIR)、扫描电镜-能量散射谱(SEM-EDS)和X射线光电子能谱(XPS)等表征方法，系统研究了HOBA在人工合成铌铁金红石浮选过程中的作用机理。结果表明，在酸性条件下，HOBA与铌铁金红石表面离子形成螯合物，以化学吸附的方式稳定结合在铌铁金红石表面，显著增强其疏水性。相较于OHA，HOBA对铌铁金红石展现出更高的选择性，有效解释了HOBA在白云鄂博实际含铌矿物体系中浮选结果优于OHA的原因。此外，通过溶液化学计算分析探讨了浮选过程中HOBA与铌铁金红石表面离子之间的相互作用，进一步讨论了HOBA与铌铁金红石作用过程中Ce3+的抑制作用和Pb2+的协同增强作用的原因。研究表明，在合适的pH范围和离子条件下，HOBA可以作为白云鄂博铌铁金红石和其他含铌矿物的有效捕收剂，合成路线的优化使其具有工业化应用的潜力。

关键词: 1-羟基辛叉-1,1-双膦酸, 白云鄂博含铌矿物, 铌铁金红石, 浮选机理