用新型捕收剂G7浮选一水硬铝石型铝土矿

昆明冶金研究院研发了一种新型、高效的铝土矿正浮选捕收剂G7，为检验其在提高精矿指标、耐低温、易消泡脱水方面的优越性能，以云南某一水硬铝石型铝土矿为研究对象进行了选矿试验。结果表明，Al₂O₃和SiO₂含量分别为67.51%和12.64%、铝硅比为5.34的铝土矿石在磨矿细度为-0.074 mm占90%、矿浆温度为3 ℃和20 ℃的情况下，采用2粗2精1扫、中矿顺序返回流程处理，分别可获得Al₂O₃品位和回收率为75.51%和89.13%，铝硅比为15.63的优质精矿和Al₂O₃品位和回收率为76.25%和90.28%、铝硅比为16.68的优质精矿。精矿指标分析和浮选过程观察表明，G7是一种性能优良、稳定、高效且适应性强的铝土矿浮选捕收剂。

Experiment on Diasporic Bauxite Floatation Using a New Collector G7

A new kind of efficient collector namely G7 used in direct floatation of bauxite has been developed by Kunming Metallurgy Research Institute.In order to verify its good performance in improving floatation index，resisting low temperature easy defoaming and dewatering，tests have been done by employing it in floatation of a diasporic bauxite from Yunnan Province.The results show that with grinding fineness of 90% -0.074 mm，by adopting the closed circuit process of two roughing-two cleaning-one scavenging，bauxite concentrate with Al₂O₃ grade of 75.51%，recovery of 89.13% and allumina-silica ratio of 15.63，and bauxite concentrate with Al₂O₃ grade of 76.25%，recovery of 90.28% and allumina-silica ratio of 16.68 were obtained at the slurry temperature of 3 ℃ and 20 ℃，respectively.Observations during the experiments together with the index analysis on the concentrate indicates that G7 is a kind of adaptable collector with high performance，high stability under low temperature and high efficiency for bauxite flotation.