油酸钠在闪锌矿表面的吸附机理  

Adsorption mechanism of sphalerite by sodium oleate

作　　者：张国范[1] 张佰发 石晴[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：《中南大学学报（自然科学版）》2017年第1期16-24,共9页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展规划(973计划)项目(2014CB643402)~~

摘　　要：通过浮选实验、吸附量测试、X线光电子能谱分析、动电位和红外光谱测试研究油酸钠在闪锌矿表面的吸附机理。研究结果表明:当油酸钠用量为1.6×10^(-4)mol/L,pH为6~10时,闪锌矿具有较好的可浮性;当pH为7时,闪锌矿表面被氧化生成Zn^(2+),有利于油酸根离子吸附,油酸根离子与Zn^(2+)作用,从而以化学吸附的方式吸附在闪锌矿表面;当pH为10时,闪锌矿表面以锌的羟基化合物为主,不利于油酸根离子的吸附,油酸根离子在闪锌矿表面主要以物理吸附的方式吸附。The flotation of sphalerite and the adsorption mechanism were studied through flotation tests, absorption measurements, XPS test, zeta potential measurements and infrared spectroscopic analysis using sodium oleate as collector. The results show that sphalerite has good floatability in pH range of 6-10 when the concentration of sodium locate is 1.6 × 10-4 mol/L. When pH is 7, the surface of sphalerite is oxidized to Zn2＋, which contributes to the adsorption of oleate ions, and chemical adsorption mainly occurs on the surface of sphalerite for sodium oleate. When pH is 10, Zn（OH）2 is the main compositions, which is unfavourable for the adsorption of oleate ions, and physical adsorption mainly occurs on the surface of sphalerite for sodium oleate.

关 键 词：油酸钠 闪锌矿 吸附机理 浮选 氧化 

分 类 号：TD91[矿业工程—选矿]