羧甲基酰胺在赤铁矿反浮选中的抑制机理研究

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。

Inhibition Mechanism of Carboxymethyl Amide in Hematite Reverse Flotation

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.