(中南大学 矿物工程系， 长沙 410083)
摘 要: 研究了一水硬铝石、高岭石及叶腊石等 单矿物在RL为捕收剂时的浮选特性 ，考察了各种调整剂、 难免离子对浮选体系的影响，在此基础上进行了人工混合矿和 实际 矿石的分离试验。实际矿石闭路试验结果表明：采用RL为捕收剂，碳酸钠和六偏磷酸钠为调整剂，精矿中Al2O3和SiO2的品位分别为70.74%和6.37%(精矿铝硅比为11.11)，Al2O3的回收率达到90.52%。
关键字: 捕收剂； 调整剂； 难免离子； 浮选特性； 铝土矿
（Department of Mineral Engineering, Central South University,
Changsha 410083, P.R.China）
Abstract: The flotation properties of single minerals suc h as diaspore, kaolinit e and pyrophyllite in bauxites have been investigated using RL as collector. Eff ects of regulators and unavoidable ion on flotation have also been studied. Ba sed on the results of single minerals tests, the separation experiments of arti ficial m ixed minerals and bauxite ore have been carried out. The concentrate with the gr ade of Al2O3 70.74% and SiO2 6.37%, and the recovery of Al2O3 90.52% i s obtained by means of closed circuit experiment of ore when using RL as collector, Na2CO3 and (NaPO3)6 as modifiers.
Key words: collector； modifier； unavoidable ion； flot ation properties； bauxite
