石英与长石在中性介质中的浮选分离研究  

The Flotation Separation of Feldspar from Quartz in Neutral Medium

作　　者：郑翠红[1] 汪敏[1] 钱明川 史晓敏[1] 过菲菲 姚婷[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《非金属矿》2015年第4期49-51,共3页Non-Metallic Mines

基　　金：安徽省教育厅自然科学研究重点项目(KJ2012A045)

摘　　要：用阴离子捕收剂油酸钠和阳离子捕收剂十二胺作为浮选捕收剂,在近中性条件下浮选分离长石和石英,研究了浮选条件对分离效果的影响以及捕收剂在矿物表面的吸附行为。实验结果表明,最佳浮选条件为:浮选温度为40℃、p H值为8、阴离子捕收剂浓度为3×10-3 mol/L、阳离子捕收剂浓度为6.25×10-4 mol/L。在最佳浮选条件下,长石回收率为70.99%,石英回收率为1.09%,差值达69.9%,分离效果显著。Zeta电位和红外光谱分析表明,油酸钠对长石不仅有物理吸附还存在化学吸附作用,对石英仅有物理吸附,因而对长石有更强的捕收能力。In this paper, a flotation route was adopted to separate feldspar from quartz in neutral medium, using sodium oleate（anionic collector） and lauryl amine（cationic collector） as the flotation collectors. The effect of the flotation conditions on the separating efficiency and the adsorbing behaviors of the collectors on quartz and albite powders was also investigated, The experimental results showed that the optimum flotation conditions were as follows： floating temperature of 40 ℃, p H value of 8, 3×10^-3 mol/L of the anionic collector concentration, and 6.25×10^-4 mol/L of the cationic collector concentration. The maximum recovery rates of feldspar and quartz under the optimum flotation conditions are 70.99% and 1.09%, respectively. The recovery difference between feldspar and quartz was as high as 69.9%, showing a high separating efficiency. The results of infrared spectra and Zeta potential analyses revealed that the interaction between sodium oleate and feldspar resulted from the physical and chemical adsorption, while that between sodium oleate and quartz was due to the physical adsorption, suggesting that sodium oleate was more efficient in collecting feldspar.

关 键 词：长石 石英 油酸钠 十二胺 浮选 

分 类 号：TD923[矿业工程—选矿]