羧甲基酰胺在赤铁矿反浮选中的抑制机理研究  

Inhibition Mechanism of Carboxymethyl Amide in Hematite Reverse Flotation

作　　者：王鹏[1] 朱一民[1] 郭文达[1] 韩跃新[1] 李艳军[1] Wang Peng Zhu Yimin Guo Wenda Han Yuexin Li Yanjun(College of Resources and Civil Engineering,Northeastern University , Shenyang 110819 ,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《金属矿山》2016年第12期118-121,共4页Metal Mine

基　　金：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)

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。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.

关 键 词：羧甲基酰胺抑制剂 赤铁矿 反浮选 抑制机理 

分 类 号：TD923.14[矿业工程—选矿]