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金属矿山 ›› 2016, Vol. 45 ›› Issue (12): 118-121.

• 矿物工程 • 上一篇    下一篇

羧甲基酰胺在赤铁矿反浮选中的抑制机理研究

王鹏,朱一民,郭文达,韩跃新,李艳军   

  1. 东北大学资源与土木工程学院,辽宁 沈阳 110819
  • 出版日期:2016-12-15 发布日期:2017-02-16
  • 基金资助:

    基金项目:国家自然科学基金项目(编号:51274056,51474055),“十二五”国家科技支撑计划项目(编号:2015BAB15B02)。

Inhibition Mechanism of Carboxymethyl Amide in Hematite Reverse Flotation

Wang Peng,Zhu Yimin,Guo Wenda,Han Yuexin,Li Yanjun   

  1. College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China
  • Online:2016-12-15 Published:2017-02-16

摘要: 为考察羧甲基酰胺抑制剂在赤铁矿反浮选脱硅中的应用效果,分别以聚丙烯羧酸(HPAM)、复配羧甲基酰胺DWP-3(由HPAM和小分子阴离子型抑制剂DNL按7∶3的质量比配制而成)为抑制剂,考察其对赤铁矿和石英单矿物可浮性的影响。单矿物浮选试验结果表明,DWP-3对石英的抑制作用较弱,对赤铁矿抑制作用相对较强,有利于赤铁矿反浮选脱硅。动电位检测和红外光谱测定结果表明:pH<2.95时,HPAM、DWP-3在石英表面存在静电吸附,pH>2.95时,HPAM、DWP-3在石英表面存在氢键吸附;pH<3.53时,HPAM、DWP-3在赤铁矿表面存在静电吸附,pH>3.53时,HPAM、DWP-3在赤铁矿表面存在氢键吸附和化学吸附。

关键词: 羧甲基酰胺抑制剂, 赤铁矿, 反浮选, 抑制机理

Abstract: In order to study the effects of carboxymethyl amide inhibitors in hematite reverse flotation for silicate removal,using Polypropylene Carboxylic Acid(HPAM) and DWP-3 (compound of HPAM and small molecule anionic inhibitor DNL with mass ratio of 7∶3) as inhibitor,influence of the inhibitor on single mineral floatability of hematite and quartz were investigated.Single mineral flotation results indicated that,DWP-3 has poorer inhibitive ability than polypropylene carboxylic acid,but intense inhibitive ability on hematite.Zeta potential and infrared spectrum measurement results indicated that,as pH<2.95,there is electrostatic adsorption on quartz surface with HPAM and DWP-3,as pH>2.95,there is hydrogen-bonding adsorption on quartz surface with HPAM and DWP-3,as pH<3.53,there is electrostatic adsorption on hematite surface with HPAM and DWP-3,as pH>3.53,there is hydrogen-bonding adsorption and chemical adsorption on hematite surface with HPAM and DWP-3.

Key words: Carboxymethyl amide depressor, Hematite, Reverse flotation, Inhibition mechanism