Ca^(2+)对磁黄铁矿浮选的“屏蔽效应”  

Shielding Effect of Ca^(2+) on Pyrrhotite Flotation

作　　者：卜显忠[1] 冯媛媛 郑灿辉 高珂[1] BU Xian-zhong;FENG Yuan-yuan;ZHENG Can-hui;GAO Ke(School of Resource Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055

出　　处：《矿冶工程》2019年第2期37-40,44,共5页Mining and Metallurgical Engineering

基　　金：陕西省教育厅专项科研项目(18JK0473);中国博士后科学基金(2018M640964)

摘　　要：以磁黄铁矿纯矿物为研究对象,采用SEM-EDS、ICP和XPS等分析方法,研究了矿浆中Ca^(2+)对磁黄铁矿可浮性的影响,并分析了其产生机制。对比普通水体和高钙水体中磁黄铁矿的浮选效果,发现高钙水体中磁黄铁矿回收率降低了14个百分点。通过多种检测分析手段证明Ca^(2+)能够在磁黄铁矿被氧化后的表面上形成一层CaSO_4薄膜,这层亲水薄膜极大地阻碍了CuSO_4对磁黄铁矿的活化,进而导致难以在高钙水体中浮选磁黄铁矿。Analysis tools,such as SEM-EDS,ICP and XPS,were used to study the shielding effect of Ca^2+ on floatability of pyrrhotite pure mineral and the mechanism therein. According to the comparison of the flotation behavior, it was found that the recovery of pyrrhotite in high calcium-bearing water was reduced by 14 percentage points, comparing to ordinary water. The mechanism study showed that,Ca^2+ could form a CaSO4 film on the oxidized pyrrhotite surface. This hydrophilic film could greatly hinder the activation of pyrrhotite by CuSO4 ,thus leading to the difficulty for the floatation of pyrrhotite in high calcium water.

关 键 词：磁黄铁矿 钙离子 浮选脱硫 高钙水体 浮选 硫酸铜 

分 类 号：TD923[矿业工程—选矿]