细粒弱磁性铁矿物自磁化-疏水絮凝-磁选研究  

Process of Self-magnetization,Hydrophobic Flocculation and Magnetic Separation of Fine Weak-magnetic Iron Minerals

作　　者：伍喜庆[1] 戴川[1] 戴亮[1] 

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

出　　处：《矿冶工程》2015年第1期39-43,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金资助项目(51274256)

摘　　要：利用菱铁矿在碱性溶液中的溶解特性,无需添加任何铁离子,通过控制矿浆p H值、反应温度、搅拌速度和时间等因素实现菱铁矿自磁化及其对赤铁矿的协同磁化作用,使弱磁性铁矿物能被选择性磁选回收。为加强细粒的回收,考察了六偏磷酸钠用量、非极性油(煤油)用量、油酸钠用量、煤油用量与油酸钠用量比、搅拌速度等因素对疏水絮凝-磁选的影响,结果表明,通过自磁化和疏水絮凝的联合作用,含Fe 42.35%的细粒(-0.038 mm)人工混合矿经0.35 T高梯度磁选机一次磁选可获得Fe品位61.30%、铁回收率90.92%的铁精矿。与其它磁选方法相比,自磁化-疏水絮凝-磁选流程处理含菱铁矿的细粒弱磁性混合铁矿石,分选效果较好。Utilizing the solubility characteristics of siderite in alkaline solution,surface self-magnetization of fine siderite and its synergic magnetization on hematite can be actualized by adjusting parameters such as pulp p H,reaction temperature,reaction time and stirring speed without adding any iron ions,resulting in a selective recovery of these weak-magnetic iron minerals. To promote the recovery of fine minerals,hydrophobic flocculation-magnetic separation in combination with self-magnetization was investigated in terms of some variables such as dosages of sodium hexametaphosphate,kerosene and sodium oleate,the ratio of kerosene to sodium oleate as well as the stirring speed.Results showed an iron concentrate with iron grade and recovery of 61. 30% and 90. 92%,respectively,was obtained from the artificial ore with fineness of- 0. 038 mm and iron grade of 42. 35% by a one-stage separation using a high gradient magnetic separator with the magnetic induction intensity of 0. 35 T. In comparison with other magnetic separation techniques,the flowsheet of self-magnetization,hydrophobic flocculation,magnetic separation is superior in treating fine weak-magnetic iron ores bearing siderite.

关 键 词：细粒 弱磁性铁矿物 自磁化 疏水絮凝 磁选 

分 类 号：TD92[矿业工程—选矿]