中文摘要：

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：p H〈2.95时,HPAM、DWP-3在石英表面存在静电吸附,p H〉2.95时,HPAM、DWP-3在石英表面存在氢键吸附;p H〈3.53时,HPAM、DWP-3在赤铁矿表面存在静电吸附,p H〉3.53时,HPAM、DWP-3在赤铁矿表面存在氢键吸附和化学吸附。

英文摘要：

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 p H 2. 95,there is electrostatic adsorption on quartz surface with HPAM and DWP-3,as p H〉2. 95,there is hydrogen-bonding adsorption on quartz surface with HPAM and DWP-3,as p H〈 3. 53,there is electrostatic adsorption on hematite surface with HPAM and DWP-3,as p H〉 3. 53,there is hydrogen-bonding adsorption and chemical adsorption on hematite surface with HPAM and DWP-3.