一水硬铝石型堆积铝土矿选矿脱硅除铁研究

来源期刊：中南大学学报(自然科学版)1980年第4期

论文作者：李隆峰 张国祥 黄开国 胡为柏

文章页码：82 - 88

关键词：堆积铝土矿； 捕收剂； 氧化石蜡皂； 选矿脱硅； 磁选流程； 浮选脱硅； 磁选除铁； 六偏磷酸钠； 铝硅比； 联合法

摘    要：本文论述了一水硬铝石型堆积铝土矿的浮选脱硅和磁选除铁。用氧化石蜡皂作捕收剂,碳酸钠、六偏磷酸钠和腐植酸钠作调整剂,一水硬铝石的浮选性能良好。经过浮选,铝精矿中Al₂O₃回收率88.19%时,可以脱除48.15%的SiO₂,铝硅比提高到15.23,比原矿提高约1.7倍。原矿直接磁选表明,铝精矿中Al₂O₃的回收率为82.62—78.25%时,Fe₂O₃的脱除率为68.97—75.44%,精矿中Fe₂O₃的含量下降到8.59—6.97%。通过选矿可为拜尔法或联合法生产氧化铝创造有利条件。

Abstract: The desilication by flotation and elimination of the iron content by mag-netic concentration of accumulative diasporite ore has been studied.Thefloatability of diasporite is good with oxiwax soap as a collector and Na₂CO₃、（NaPO₃）₆ and sodium humate（a salt of humic acid）as modifying agents.By means of flotation,48.15% silica is separated,88.19% alumina is reco-vered in the concentrate.The Al₂O₃ to SiO₂ ratio is raised to 15.23.It is1.7 times higher than the raw ore.By magnetic concentration,68.97%—75.44% Fe₂O₃ can be eliminatad,while the content of Fe₂O₃ decreased to 8.59—6.97% and the recovery of Al₂O₃ was 82.62—78.25% in the concent-rate.It seems promising that the beneficiation of bauxite will produce amore favorable raw material for the production of alumina by the Bayer orCombination processes.