Scholarlink

<p>High gradient magnetic separation (HGMS) is an important method for separating columbite-tantalite group minerals from non-magnetic minerals, especially applied in roughing. However, the rough concentrate obtained by HGMS has a low grade, while a part of tantalum-niobium minerals exists in the tailings, which affects the technical index of tantalum-niobium elements. In this study, tantalum-niobium mineral particles with different characteristics are generated by controlling the grinding fineness, and mineralogical analyses of each HGMS product are conducted using a mineral liberation analyzer (MLA). The influence of mineralogical characteristics on the separation behavior of columbite-tantalite group minerals is studied from mineral composition, particle size distribution, liberation degree, and dissemination characteristics. It is found that the main factor determining the separation behavior of columbite-tantalite group minerals in a magnetic field is the degree of liberation (<i>X</i>), followed by the association of the mineral aggregates and the particle size ratio of the two minerals of the inclusion particles (<i>D</i>). The liberation degree of niobium-tantalum group minerals in HGMS concentrate is mainly at 90 &lt; <i>X</i> ≤ 100 and the particle size is mainly at − 0.15 + 0.045 mm, while the liberation degree of niobium-tantalum group minerals in tailings is mainly at 0 &lt; <i>X</i> ≤ 25, and the particle size is mainly at − 0.020 mm. In dissemination characteristics, adjoining tantalum-niobium mineral concretions tend to enter the concentrate, tantalum-niobium mineral inclusions with <i>D</i> &lt; 40 tend to enter the concentrate, and tantalum-niobium mineral inclusions with <i>D</i> &gt; 40 tend to enter the tailings. In addition, with the increase of grinding fineness, the grade of Ta and Nb in the concentrate gradually decreases, the content of gangue minerals gradually increases, and the fine-grained gangue minerals are easy to enter the concentrate. The results provide theoretical support for the enhanced separation of columbite-tantalite group minerals in magnetic fields.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of Mineralogical Characteristics on the Separation Behavior of Columbite-Tantalite Group Minerals in a Magnetic Field

  • 期刊论文

  • 发表日期：

    2025年2月27日

查看全文
  • Jian Xu,
  • Chunqing Gao,
  • Hongzhen Luo,
  • Hanxu Yang,
  • Lin Zhang,
  • Mingyu Sai,
  • Hailiang Wang,
  • Jun Hu,
  • Hongwei Cheng

摘要

High gradient magnetic separation (HGMS) is an important method for separating columbite-tantalite group minerals from non-magnetic minerals, especially applied in roughing. However, the rough concentrate obtained by HGMS has a low grade, while a part of tantalum-niobium minerals exists in the tailings, which affects the technical index of tantalum-niobium elements. In this study, tantalum-niobium mineral particles with different characteristics are generated by controlling the grinding fineness, and mineralogical analyses of each HGMS product are conducted using a mineral liberation analyzer (MLA). The influence of mineralogical characteristics on the separation behavior of columbite-tantalite group minerals is studied from mineral composition, particle size distribution, liberation degree, and dissemination characteristics. It is found that the main factor determining the separation behavior of columbite-tantalite group minerals in a magnetic field is the degree of liberation (X), followed by the association of the mineral aggregates and the particle size ratio of the two minerals of the inclusion particles (D). The liberation degree of niobium-tantalum group minerals in HGMS concentrate is mainly at 90 < X ≤ 100 and the particle size is mainly at − 0.15 + 0.045 mm, while the liberation degree of niobium-tantalum group minerals in tailings is mainly at 0 < X ≤ 25, and the particle size is mainly at − 0.020 mm. In dissemination characteristics, adjoining tantalum-niobium mineral concretions tend to enter the concentrate, tantalum-niobium mineral inclusions with D < 40 tend to enter the concentrate, and tantalum-niobium mineral inclusions with D > 40 tend to enter the tailings. In addition, with the increase of grinding fineness, the grade of Ta and Nb in the concentrate gradually decreases, the content of gangue minerals gradually increases, and the fine-grained gangue minerals are easy to enter the concentrate. The results provide theoretical support for the enhanced separation of columbite-tantalite group minerals in magnetic fields.