摘要
本文论述了细粒浮选特效捕收剂的分子设计思想和方法。认为该捕收剂应是具有絮凝和捕收双重功能的聚合物表面活性剂。用对甲基苯胺与甲醛通过缩聚反应合成了一种阳离子型的聚合物表面活性剂甲基苯胺树脂(代号PCA)。实验结果证实,甲基苯胺树脂对细粒石英具有良好的絮凝和捕收双重功能,是细粒浮选的特效捕收剂,以PCA-8为捕收剂,草酸为调整剂,成功地进行了东鞍山铁矿-20μm铁矿泥(含铁31.5％)的反浮选实验,获得了品位为65.19％Fe,回收率为67.54％,或者品位为60.18％Fe,回收率为78％的浮选指标。
The molecular design of effective conector for fine particles flotation is discussed. It is proposed that the effective collector for fine mineral is the polymeric surfactant possessing both flocculation and collection functions. A cationic polymeric surfactant aldehyde-P-toluidine resin (namely, PCA) is pre- pared by the condensation polymerization of aldehyde and P-toluidine in acid medium. Test results con- firm that the resin possesses both good functions of flocculation and collection and is a special effective collector for fine quartz. A concentrate with a grade of 65. 19%Fe and recovery 67. 54%, or 60. 18%Fe and 78% recovery is obtained from a natural iron slime assayed 31. 5%Fe and sized. - 20μm from Dong Ansan Iron Mine by reversal flotation technology using PCA-8 as collector and ox- alic acid as regulator in natural pH condition.
关键词
选矿
石英
细粒
捕收剂
分子设计
polymeric surfactant
fine particles flotation
molecular design of collector
aldehyde-P-toluidine resin
flotation of iron slime
