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Volume 30 Issue 2
Feb.  2023
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文章导航 >  矿物冶金与材料学报（英文）  > 2023  >  30(2): 271-282
Runpeng Liao, Shuming Wen, Qicheng Feng, Jiushuai Deng, and Hao Lai, Activation mechanism of ammonium oxalate with pyrite in the lime system and its response to flotation separation of pyrite from arsenopyrite, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 271-282. https://doi.org/10.1007/s12613-022-2505-5
Cite this article as:
Runpeng Liao, Shuming Wen, Qicheng Feng, Jiushuai Deng, and Hao Lai, Activation mechanism of ammonium oxalate with pyrite in the lime system and its response to flotation separation of pyrite from arsenopyrite, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 271-282. https://doi.org/10.1007/s12613-022-2505-5
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研究论文

草酸铵对石灰体系中受抑黄铁矿和毒砂的选择性活化机理研究

  • 1)

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

  • 2)

    云南省战略金属矿产资源绿色分离与富集重点实验室, 昆明理工大学, 昆明 650093, 中国

  • 3)

    化学与环境工程学院, 中国矿业大学(北京), 北京 100083, 中国

  • 4)

    柳州华锡有色设计研究院有限责任公司, 华锡集团, 柳州 545006, 中国

  • 通讯作者:

    丰奇成    E-mail: fqckmust@163.com

    邓久帅    E-mail: dengshuai689@163.com

文章亮点

  • (1) 系统研究了草酸铵对石灰体系受抑黄铁矿和毒砂浮选分离的影响。
  • (2) 石灰体系受抑黄铁矿经草酸铵作用后其疏水性和可浮性显著提高。
  • (3) 进一步探明了石灰体系中受抑黄铁矿和毒砂表面的亲水性物质组成。
  • (4) 深入研究了草酸铵对石灰体系中受抑黄铁矿的活化机理。
  • 在多金属硫化矿的浮选过程中，通常使用大量石灰将黄铁矿和毒砂抑制到尾矿中，而要实现受抑黄铁矿和毒砂的浮选分离，首先需要进行活化。硫酸是目前应用最广泛的选硫活化剂，但其存在诸多弊端，所以研究开发新型绿色环保选硫活化剂，实现受抑黄铁矿和毒砂的高效分离显得尤为必要。本文旨在开发利用草酸铵作为受抑黄铁矿和毒砂浮选分离的选择性活化剂。本文以受抑黄铁矿和毒砂纯矿物及广西华锡集团多金属硫化矿含硫含砷尾矿为研究对象，以草酸铵为活化剂，乙基黄药为捕收剂，较好实现了黄铁矿和毒砂的浮选分离。通过接触角试验研究了草酸铵对黄铁矿和毒砂表面疏水性的影响，受抑黄铁矿经草酸铵和乙基黄药处理后，其表面疏水性显著增加，接触角从66.62°增加到75.15°，然后增加到81.21°，而受抑毒砂经草酸铵和乙基黄药处理后其表面疏水性并无显著变化。紫外分光光度计检测结果表明，不同浓度的草酸铵处理后，乙基黄药在黄铁矿表面的吸附量显著增加。Zeta电位测量表明，经草酸铵活化后，黄铁矿表面的Zeta电位因添加乙基黄药而变的更负。X射线光电子能谱测试表明，经过草酸铵处理后，受抑黄铁矿表面的O 1s含量从44.03%下降到26.18%，S 2p含量从14.01%上升到27.26%，而受抑毒砂表面S 2p含量无显著变化，这证实了草酸铵对受抑黄铁矿的活化性能显著优于受抑毒砂。因此，草酸铵可作为石灰体系中受抑黄铁矿的选择性活化剂，实现黄铁矿和毒砂的高效浮选分离。
    • Research Article

    Activation mechanism of ammonium oxalate with pyrite in the lime system and its response to flotation separation of pyrite from arsenopyrite

    + Author Affiliations
      Abstract
    • The activation properties of ammonium oxalate on the flotation of pyrite and arsenopyrite in the lime system were studied in this work. Single mineral flotation tests showed that the ammonium oxalate strongly activated pyrite in high alkalinity and high Ca2+ system, whereas arsenopyrite was almost unaffected. In mineral mixtures tests, the recovery difference between pyrite and arsenopyrite after adding ammonium oxalate is more than 85%. After ammonium oxalate and ethyl xanthate treatment, the hydrophobicity of pyrite increased significantly, and the contact angle increased from 66.62° to 75.15° and then to 81.21°. After ammonium oxalate treatment, the amount of ethyl xanthate adsorption on the pyrite surface significantly increased and was much greater than that on the arsenopyrite surface. Zeta potential measurements showed that after activation by ammonium oxalate, there was a shift in the zeta potential of pyrite to more negative values by adding xanthate. X-ray photoelectron spectroscopy test showed that after ammonium oxalate treatment, the O 1s content on the surface of pyrite decreased from 44.03% to 26.18%, and the S 2p content increased from 14.01% to 27.26%, which confirmed that the ammonium oxalate-treated pyrite surface was more hydrophobic than the untreated surface. Therefore, ammonium oxalate may be used as a selective activator of pyrite in the lime system, which achieves an efficient flotation separation of S–As sulfide ores under high alkalinity and high Ca2+ concentration conditions.
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