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本文提供了用絮凝剂和表面活性剂团聚和浮选细粒的试验数据。工作中用ZnO和MgO的水悬浮液进行试验,使用常规的浮选捕收剂油酸钠(SOL)、十二烷基硫酸钠(SDS)和十六烷基三甲基溴化铵(CTAB),所用絮凝剂为工业用高分子量聚合物(MAGNAFLOC1440、MAGNAFLOCE-10及MAGN-AFLOC351)。在自然pH下测量了吸附在这两种氧化物上的表面活性剂的吸附等温线。用油酸钠时吸附密度最大。Zeta电位测量结果表明,加入阳离子表面活性剂使Zeta电位正值增加,MgO的正Zeta电位随阴离子表面活性剂浓度增加而降低。稳定性的降低说明,当加入阳离子絮凝剂(MAGNAFLOC1440)时,经阴离子表面活性剂预处理的ZnO悬浮液形成了较大的絮凝物。用阴离子表面活性剂预处理的MgO悬浮液与非离子型絮凝剂MAGNAFLOC351作用也有类似结果。当SDS与阳离子或非离子絮凝剂结合形成疏水絮凝物时,荷负电的捕收剂(SDS)对ZnO絮凝物的浮选是良好的捕收剂。
This article provides experimental data on agglomeration and flotation of fines with flocculants and surfactants. In the work, an aqueous suspension of ZnO and MgO was used for the test, using conventional flotation collectors sodium oleate (SOL), sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB ), Flocculants used in industrial high molecular weight polymers (MAGNAFLOC1440, MAGNAFLOCE-10 and MAGN-AFLOC351). The adsorption isotherms of surfactants adsorbed on these two oxides were measured at natural pH. With sodium oleate, the highest adsorption density. Zeta potential measurements showed that the addition of cationic surfactant increased the positive Zeta potential and the positive zeta potential of MgO decreased with the increase of anionic surfactant concentration. The reduction in stability indicates that larger flocs were formed in ZnO suspensions pretreated with anionic surfactant when cationic flocculant (MAGNAFLOC 1440) was added. Similar results were obtained for the effect of MgO suspension pretreated with anionic surfactants and non-ionic flocculant MAGNAFLOC351. When SDS combines with cationic or non-ionic flocculants to form hydrophobic flocs, negatively charged collectors (SDS) are good collectors for the flotation of ZnO flocs.