Dispersant adsorption and effects on settling behavior of iron ore
Document Type
Article
Publication Date
8-1-2013
Department
Department of Geological and Mining Engineering and Sciences
Abstract
The effectiveness of reagent adsorption onto hematite ore particle surfaces is critical during beneficiation to promote effective selective flocculation and dispersion and increase iron oxide recovery. The relationship between aqueous calcium in the process water and the effectiveness of common iron ore dispersants has never before been studied. The nature of common dispersants was studied in the presence and absence of calcium in the process water. The settling behavior of hematite-rich iron ore at pH 11 was assessed in the presence of calcium and inorganic dispersants: sodium silicate, sodium tripolyphosphate (STPP), sodium hexametaphosphate (SHMP) and organic dispersant ethylenediamenetetraacetic acid (EDTA). It was found that inorganic dispersants are ineffective at a pH of 11 without activating the surface sites of the ore particles with calcium. Organic dispersants, however, were found to be effective with and without surface site activation.
Publication Title
Minerals and Metallurgical Processing
Recommended Citation
Haselhuhn, H.
(2013).
Dispersant adsorption and effects on settling behavior of iron ore.
Minerals and Metallurgical Processing,
30(3), 188-189.
http://doi.org/10.1007/bf03402269
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/4581