作　　者： (朱一民）; (张婧）; (陈金鑫）; (张淑敏）; (李艳军）;

机构地区： 东北大学资源与土木工程学院,辽宁沈阳110819 东北大学2011钢铁共性技术协同创新中心,辽宁沈阳110819 辽宁省难采选铁矿石高效开发利用技术工程实验室,辽宁沈阳110819

出　　处： 《金属矿山》 2017年第8期109-112,共4页

摘　　要： 针对现阶段磷灰石浮选采用的脂肪酸类阴离子捕收剂需在较高矿浆温度下使用,造成生产能耗和成本上升的问题,东北大学研制了一种磷灰石新型、高效、常温捕收剂DCH-1。试验研究了该捕收剂浮选磷灰石纯矿物的工艺技术条件,并对DCH-1在磷灰石表面作用的机理进行了研究。结果表明:(1)DCH-1捕收磷灰石的最适宜矿浆pH=7.50,最佳用量为200 mg/L,最佳温度范围为16~30℃。(2)DCH-1用量从50 mg/L增至200 mg/L,磷灰石表面接触角逐渐增大,磷灰石回收率上升,这是由于磷灰石表面与DCH-1的极性基相互作用,而DCH-1的非极性基暴露在外,使磷灰石表面的亲水性降低,亲气性增强所致;DCH-1用量从200 mg/L增至250 mg/L,磷灰石表面接触角降至100.5°,DCH-1在磷灰石表面形成了多层吸附,从而使磷灰石的回收率降低。(3)在弱酸性至碱性条件下,DCH-1与磷灰石间没有发生静电吸附,而是键合吸附和氢键作用。 At present,the use of fatty acid anion collector for apatite flotation at this stage is required to be used at higher slurry temperature,resulting in the problem of energy consumption and costs raising. Northeastern University has developed a new type of high performance collector DCH-1 for apatite at room temperature.The flotation process conditions of apatite pure minerals were studied.The action mechanism of DCH-1 on the surface of apatite was studied.The results showed that：（ 1） The optimum pH value,dosage and temperature of DCH-1 for collecting apatite is 7.50,200 mg/L,and 16 - 30 ℃ respectively.（2）When the amount of DCH-1 is increased from 50 mg/L to 200 mg/L,the contact angle of apatite gradually increases,and the recovery rate of apatite increases.The reason is that,with the interaction of apatite surface with DCH-1 polar group,the exposure of non-polar group of DCH-1 decreases the hydrophilicity of apatite surface and enhances the aerophily of apatite.While,the dosage of DCH-1 is increased from 200 mg/L to 250 mg/L,the surface contact angle is decreased to 100. 5 °,a multi-layer adsorption of DCH-1 in the apatite surface is formed,so that the recovery of apatite is reduced.（3） In the conditions from weak acid to alkaline,DCH-1 does not occur the electrostatic adsorption,but the bonding adsorption and hydrogen bonding action with apatite.

关 键 词： 磷灰石 常温捕收剂 机理研究