低品位高铁铝土矿浮选脱硅试验研究  

Desilication of Low-grade High-Iron Bauxite by Flotation

作　　者：霍强[1,2] 刘晰 谢建平[1,2] 刘新星[1,2] 邱冠周[1,2] HUO Qiang;LIU Xi;XIE Jian-ping;LIU Xin-xing;QIU Guan-zhou(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Key Laboratory of Biometallurgy of Ministry of Education,Central South University,Changsha 410083,Hunan,China;Zhengzhou Non-ferrous Metals Research Institute Co Ltd of CHALCO,Zhengzhou 450041,Henan,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]中南大学生物冶金教育部重点实验室,湖南长沙410083 [3]中国铝业郑州有色金属研究院有限公司,河南郑州450041

出　　处：《矿冶工程》2018年第6期51-54,共4页Mining and Metallurgical Engineering

基　　金：中南大学研究生科研创新项目(1053320170205)

摘　　要：低品位高铁铝土矿矿石硬度较高而易过磨,造成浮选指标恶化。通过QEMSCAN分析磨矿产物各粒级组成,发现磨矿产品粗、细粒级两级分化严重且大部分三水铝石矿物在细粒级矿样中富集。考查了磨矿细度、抑制剂添加量、高分子调整剂添加量、捕收剂用量与浮选矿浆浓度等单因素对浮选的影响并确定最优浮选条件。在最优浮选条件下进行闭路试验,取得了精矿氧化铝含量54.47%、铝硅比7.02、氧化铝回收率75.96%的良好浮选指标。Overgrinding occurs because of high hardness of low-grade high-iron bauxite, leading to deterioration of the flotation index. QEMSCAN instrument was introduced to analyze the mineral compositions of grinding products screened into a variety of size ranges, and it is found that there existed polarization between coarse- and fine-grained fractions and enrichment of gibbsite in the fine-grained fraction. Effects of single factors such as grinding fineness, depressant dosage, macromolecule regulator dosage, collector dosage, and pulp concentration on flotation were investigated to optimize processing parameters. A closed-circuit test operated at the optimal flotation conditions resulted in the concentrate containing 54.47% Al2O3 with recovery at 75.96%, and A/S ratio at 7.02.

关 键 词：低品位高铁铝土矿 浮选 脱硅 QEMSCAN 

分 类 号：TD952[矿业工程—选矿]