重庆某高硫铝土矿石选矿试验

重庆某高硫铝土矿石中主要含铝矿物为一水硬铝石，主要含硫矿物为黄铁矿，铝硅比仅为4.73。对该矿石脱硫降硅提铝工艺技术条件进行了研究。结果表明，采用1次粗浮选选硫，2粗3精1精扫、中矿顺序返回浮铝土矿流程处理该矿石，最终获得了Al₂O₃品位为65.81%、含硫0.42%、铝硅比为9.09、Al₂O₃回收率为77.88%的铝土矿精矿，副产品硫精矿硫品位为22.13%、回收率为82.69%、Al₂O₃含量为32.94%、回收率为5.15%。

Beneficiation Tests on a High-sulfur Bauxite of Chongqing

In a Chongqing high sulfur bauxite，the main aluminum-containing mineral is diaspore，sulfur-containing mineral is pyrite and the ratio of Al-Si is only 4.73%. The technical conditioning tests on sulfur removal，silicon decrease and aluminum increase were made. The results show that bauxite concentrate with Al₂O₃ grade of 65.81%，S giade of 0.42%，Al-Si ratio of 9.09，and Al₂O₃ recovery of 77.88% was ultimately obtained by the flow-sheet processes of one roughing floatation for sulfur concentration，two roughings,three cleanings and one scavenging and middles back to the flow-sheet in turn. The byproduct sulfur concentrate with S grade of 22.13%，S recovery of 82.69%，Al₂O₃content of 32.94% and the recovery rate of 5.15% was achieved.