红外光谱分析技术在浮选过程中的应用研究进展

发布时间：2018-11-07 07:49

【摘要】：随着浮选研究的深入发展,以捕收剂为核心的浮选药剂作用机理的研究逐渐成为研究焦点。红外光谱以速度快、成本低、无损等特点成为浮选药剂作用机理研究最为重要的手段之一。首先从文献报道数量和比例说明红外光谱在该研究中的重要地位,并总结了常见浮选药剂的红外光谱特征,最后分别阐述了红外光谱在捕收剂、抑制剂、活化剂等浮选药剂作用机理中的应用研究进展。归纳出红外光谱用于判定捕收剂在矿物表面作用三种机制的判据:如果捕收剂作用后的矿物表面有新的吸收峰,则捕收剂在矿物表面发生了化学反应;如果仅有吸收峰的位置发生移动,并超过测试设备本身误差范围的移动量,则捕收剂在矿物表面形成的是化学吸附;排除上述产生的新红外特征吸收峰和红外特征峰的移动,且通过反复水洗即可清除表面沾染的捕收剂分子,则捕收剂在矿物表面发生的是物理吸附。并指出红外光谱在浮选过程中的应用研究存在的两大问题,一是将捕收剂与矿物表面的化学反应和化学吸附机理混淆;二是忽视红外光谱仪器吸收峰位移2~4cm-1背景误差。展望未来红外光谱在浮选过程中的应用研究应该着眼于多种药剂混合用药在矿物表面作用机理的研究,该领域内红外光谱的定量分析研究及红外光谱吸收峰位移的背景误差分析等三方面。
[Abstract]:With the development of flotation research, the research on the mechanism of flotation reagents with collector as the core has gradually become the focus. Infrared spectroscopy is one of the most important methods to study the mechanism of flotation reagents because of its high speed, low cost and no damage. The important position of infrared spectrum in this research is explained from the quantity and proportion of literature reports, and the infrared spectrum characteristics of common flotation reagents are summarized. Finally, the infrared spectrum in collector and depressant is described respectively. Research progress on the mechanism of action of flotation reagents such as activators. The criteria of infrared spectrum used to judge the action of collector on mineral surface are summarized. If there is a new absorption peak on the surface of mineral after the action of collector, the collector has chemical reaction on mineral surface. If only the position of the absorption peak is shifted and the amount of movement exceeds the error range of the test equipment, the collector forms chemisorption on the mineral surface; Removing the movement of the new infrared characteristic absorption peaks and infrared characteristic peaks, and removing the collector molecules from the surface by repeated washing, the collector is physically adsorbed on the mineral surface. It is pointed out that there are two major problems in the application of infrared spectroscopy in flotation, one is to confuse the chemical reaction and chemisorption mechanism between collector and mineral surface, the other is to ignore the 2~4cm-1 background error of absorption peak shift of infrared spectrometer. Looking forward to the future research on the application of infrared spectroscopy in the flotation process, we should focus on the study of the mechanism of the mixed use of many kinds of medicament on the surface of minerals. In this field, the quantitative analysis of infrared spectrum and the background error analysis of absorption peak shift in infrared spectrum are studied.
【作者单位】：中南大学化学与化工学院;中建材(合肥)粉体科技装备有限公司;南昌工学院基础教学部;中钢集团马鞍山矿山研究院有限公司;
【基金】：国家科技部科研院所技术开发研究专项资金项目(2013EG132088) 安徽省科技攻关项目(12010402c187)资助
【分类号】：O657.33;TD923

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