摘要
云南某堆积型高铁铝土矿Al2O3含量42.13%、SiO2含量15.73%、TFe含量17.44%、铝硅比2.68。采用正浮选分离铝和硅,研究了pH值调整剂用量、抑制剂种类与用量、捕收剂用量及磨矿细度等对浮选脱硅效果的影响,适宜工艺条件下的浮选闭路试验获得了Al2O3品位52.16%、铝硅比7.69、Al2O3回收率70.30%、TFe含量20.89%的浮选铝精矿。采用磁化焙烧-磁选对浮选铝精矿开展铝铁分离探索试验研究,最终获得铝硅比8.70、Al2O3品位69.34%的铝精矿以及TFe品位52.34%、作业回收率76.03%的铁粗精矿。
An accumulative bauxite ore in Yunnan containing 42.13%Al 2O3,15.73%SiO2 and 17.44%TFe,namely,with an Al/Si ratio of 2.68,was taken in a flotation for Al/Si separation,and the effects of pH regulator dosage,type and dosage of depressant,collector dosage and grinding fineness on desilication performance of flotation were all investigated.A closed⁃circuit flotation test performed with the optimized parameters produced an aluminum concentrate with Al 2O3 grade and recovery of 52.16%and 70.30%,Al/Si ratio of 7.69,and TFe grade of 20.89%,respectively.Then,a flowsheet consisting of magnetic roasting and magnetic separation was introduced to treat this aluminum concentrate for Al/Fe separation,which produced a final aluminum concentrate containing 69.34%Al 2O3 with Al/Si ratio of 8.70,and a rough iron concentrate grading 52.34%TFe with a process recovery of 76.03%.
作者
杨林
张锦仙
阚赛琼
吕超
YANG Lin;ZHANG Jinxian;KAN Saiqiong;LÜChao(Kunming Metallurgical Research Institute Co Ltd,Kunming 650031,Yunnan,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Yunnan Key Laboratory for New Technology of Beneficiation and Metallurgy,Kunming 650031,Yunnan,China;Kunming Engineering&Research Institute of Nonferrous Metallurgy Co Ltd,Kunming 653030,Yunnan,China)
出处
《矿冶工程》
CAS
北大核心
2023年第3期75-78,83,共5页
Mining and Metallurgical Engineering
基金
云南省科技厅基础研究专项面上项目(202101AT070026)。
关键词
高铁铝土矿
浮选
铝硅比
铝精矿
磁化焙烧
磁选
脱硅
铝铁分离
high⁃iron bauxite
flotation
Al/Si ratio
aluminum concentrate
magnetic roasting
magnetic separation
desilication
Al/Fe separation
