微细粒钛铁矿和钛辉石的剪切絮凝浮选行为  

The shear flocculation flotation behaviors of micro fine ilmenite and titanaugite

作　　者：范桂侠[1] 曹亦俊[1] 

机构地区：[1]中国矿业大学化工学院国家煤加工与洁净化工程技术中心,江苏徐州221116

出　　处：《中国矿业大学学报》2015年第3期532-539,572,共9页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划(973)项目(2012CB214905);江苏高校优势学科建设工程资助项目(PAPD);中央高校基本科研业务费专项资金项目(2014XT05)

摘　　要：通过矿物可浮性试验、粒径测试、光学显微镜测试、浊度沉降法和颗粒间相互作用的计算,对微细粒钛铁矿和钛辉石的剪切絮凝浮选行为进行分析.结果表明,适宜的搅拌强度和搅拌时间可提高微细粒钛铁矿和钛辉石的可浮性,搅拌强度对剪切絮凝的影响随颗粒疏水性的增强而变小,絮体粒径随搅拌强度的增加而明显增大.钛辉石形成的絮体主要为开放型的枝链状结构,而钛铁矿絮体枝链闭合,较为密实;矿物的剪切絮凝行为与矿物可浮性的变化是一致的,这两种矿物颗粒在捕收剂溶液中均能发生絮凝行为.The shear flocculation characteristics of micro fine ilmenite and titanaugite were in- vestigated by the minerals floatability tests, particle size analysis, light microscope measure- ments, turbidimetric sedimentation tests and calculation of interaction between particles. The results show that the floatability of micro fine ilmenite and titanaugite can be improved under optimum stirring intensity and time. With the increasing of hydrophobicity of particles, the effect of stirring intensity on shear flocculation decreases. The size of flocs increased with the increasing of stirring intensity. The open branch chain structure is observed from titanaugite floes. The more compact and closed branch chain structure are acquired from ilmenite flocs. The shear flocculation power is consistent with minerals floatability. For these two minerals, the flocculation behaviors can occur easily in the collecting agent.

关 键 词：钛铁矿 钛辉石 剪切絮凝 搅拌 粒径 

分 类 号：TD952[矿业工程—选矿]