Interfacial properties of natural magnetite particles compared with their synthetic analogue

被引：16

作者：

Potapova, E. ^{[1
]}

Yang, X. ^{[2
]}

Westerstrand, M. ^{[1
]}

Grahn, M. ^{[1
]}

Holmgren, A. ^{[1
]}

Hedlund, J. ^{[1
]}

机构：

[1] Lulea Univ Technol, SE-97187 Lulea, Sweden

[2] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China

来源：

MINERALS ENGINEERING | 2012年 / 36-38卷

关键词：

Flotation reagents; Iron ores; Particle size; Surface modification; ATR-FTIR SPECTROSCOPY; SODIUM-SILICATE; FLOTATION COLLECTOR; CALCIUM-IONS; ADSORPTION; SURFACTANT; BEHAVIOR; OXIDES; ACIDS;

D O I：

10.1016/j.mineng.2012.03.030

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Understanding of the interactions between iron oxides and flotation reagents is important both for flotation and agglomeration of iron ore. Model systems comprising synthetic iron oxides and pure chemical reagents are commonly applied in experimental work in order to obtain high quality data and to ease the interpretation of the empirical data. Whether the results obtained using model systems are valid for iron ore minerals and commercial reagents is a question seldom addressed in the literature. It is shown in this work that previously reported results obtained from a model system, concerning adsorption of a carboxylate surfactant and sodium metasilicate onto synthetic magnetite nanoparticles, as obtained by in situ ATR-FTIR spectroscopy and contact angle measurements, are applicable to adsorption of flotation reagents on magnetite concentrate. Additionally, the problem of restoring magnetite wetting after flotation is addressed since good wetting of a magnetite concentrate is required to produce iron ore pellets by wet agglomeration. The results from the present work indicate that the wettability of both synthetic magnetite coated with surfactant and magnetite concentrate after flotation can be improved by adsorbing a hydrophilizing agent such as silicate or polyacrylate. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：187 / 194

页数：8

共 25 条

[1] Interaction of ester and acid groups containing organic compounds with iron oxide surfaces [J].