【摘要】 广西某高硅铝土矿中Al₂O₃含量为48.75%,SiO₂含量为21.02%,铝硅比仅为2.32。目的矿物为一水硬铝石，脉石矿物为石英、高岭石和赤铁矿等。脉石矿物在磨矿过程中极易泥化，且原矿铝硅比较低，严重影响浮选指标。通过优化磨矿细度、捕收剂和调整剂等试验条件，采用“两粗一扫两精”的闭路浮选流程，浮选药剂全部联合加入槽中搅拌，获得浮选精矿Al₂O₃含量59.24%,SiO₂含量9.42%,铝硅比为6.29,Al₂O₃回收率为89.86%,为类似矿石的高效利用提供了借鉴。更多还原

【Abstract】 A high-silicon bauxite in Guangxi contains 48.75% Al₂O₃ and 21.02 % SiO₂, and the Al/Si ratio is only 2.32. The target minerals are diaspore, gangue minerals are quartz, kaolinite, hematite, etc. Gangue minerals are easily mudded during the grinding process, and the Al/Si ratio of raw ore is low, which seriously affects the flotation index. By optimizing the test conditions such as grinding fineness, collector and regulator, the closed-circuit flotation process of "two roughing, one scavenging and two cleaning" was adopted. All flotation reagents were added to the tank and stirred. The flotation concentrate was obtained, with Al₂O₃ content of 59.24%, SiO₂ content of 9.42 %, Al/Si ratio of 6.29 and Al₂O₃ recovery of 89.86%, thus providing reference for the efficient utilization of similar ores.更多还原