Interaction mechanism between carboxylmethyl cellulose and iron ore concentrates in iron ore agglomeration

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 analyze...

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Bibliographic Details
Published inJournal of Central South University Vol. 22; no. 4; pp. 1241 - 1246
Main Authors Yang, Gui-ming, Fan, Xiao-hui, Chen, Xu-ling, Yuan, Li-shun, Huang, Xiao-xian, Li, Xi
Format Journal Article
LanguageEnglish
Published Heidelberg Central South University 01.04.2015
Subjects
Engineering
Metallic Materials
interaction mechanism
adsorption
agglomeration
iron ore concentrate
carboxylmethyl cellulose
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ISSN2095-2899
2227-5223
DOI10.1007/s11771-015-2639-y

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Summary: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 Fe 2 O 3 than Fe 3 O 4 , 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.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-015-2639-y