Interaction mechanism between carboxylmethyl cellulose and iron ore concentrates in iron ore agglomeration
来源期刊：中南大学学报(英文版)2015年第4期
论文作者：YANG Gui-ming FAN Xiao-hui CHEN Xu-ling YUAN Li-shun HUANG Xiao-xian LI Xi
文章页码：1241 - 1246
Key words：carboxylmethyl cellulose; iron ore concentrate; interaction mechanism; adsorption; agglomeration
Abstract: Carboxylmethyl cellulose (CMC) has become a commercial organic binder in agglomeration of iron ore concentrates. The relative molecular mass and degree of substitution (DS) of CMC have a large impact on its binding performance. the interaction mechanism between CMC and iron ore particles was analyzed through zeta potential measurements, adsorption measurements and infrared spectra. The results show that the interaction is chemical adsorption-oriented and the CMC’s adsorption performance is related to the properties of CMC as well as the type of iron oxides. CMC has a greater affinity to Fe2O3 than Fe3O4, and CMC with higher relative molecular mass shows a higher adsorption isotherm. Pelletization of practical iron ore concentrates added with CMC further illustrates that CMC with higher relative molecular mass or DS exhibits a better binding performance, which is consistent with the results of adsorption tests.
YANG Gui-ming(杨桂明), FAN Xiao-hui(范晓慧), CHEN Xu-ling(陈许玲), YUAN Li-shun(袁礼顺), HUANG Xiao-xian(黄晓贤), LI Xi(李曦)
(School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China)
Abstract:Carboxylmethyl cellulose (CMC) has become a commercial organic binder in agglomeration of iron ore concentrates. The relative molecular mass and degree of substitution (DS) of CMC have a large impact on its binding performance. the interaction mechanism between CMC and iron ore particles was analyzed through zeta potential measurements, adsorption measurements and infrared spectra. The results show that the interaction is chemical adsorption-oriented and the CMC’s adsorption performance is related to the properties of CMC as well as the type of iron oxides. CMC has a greater affinity to Fe2O3 than Fe3O4, and CMC with higher relative molecular mass shows a higher adsorption isotherm. Pelletization of practical iron ore concentrates added with CMC further illustrates that CMC with higher relative molecular mass or DS exhibits a better binding performance, which is consistent with the results of adsorption tests.
Key words:carboxylmethyl cellulose; iron ore concentrate; interaction mechanism; adsorption; agglomeration
