Effect of Sodium Hexametaphosphate on Flotation of Quartz and Hematite with Starch/Etheramine in the Presence of Ca and Mg Ions

The aim of this study was to evaluate the effect of sodium hexametaphosphate (SHMP), a complexing reagent for Ca and Mg ions, on iron ore reverse cationic flotation. Quartz and hematite samples contaminated with both Ca and Mg were subjected to microflotation assays at pH 10.5 with starch and ethera...

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Bibliographic Details
Published in:Mineral processing and extractive metallurgy review 2024-11, Vol.45 (8), p.950-956
Main Authors: da Cruz, D. G., Alves, M. O., Fernandes Lima, R. M.
Format: Article
Language:English
Subjects:
Anions
Ca and Mg ions
Calcium chloride
etheramine
Flotation
Fourier transforms
Hematite
Infrared spectroscopy
Ions
iron ore flotation
Iron ores
Magnesium chloride
Microflotation
Minerals
Quartz
Reagents
Reverse flotation
Sodium
sodium hexametaphosphate-SHMP
Starch
Zeta potential
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Summary:The aim of this study was to evaluate the effect of sodium hexametaphosphate (SHMP), a complexing reagent for Ca and Mg ions, on iron ore reverse cationic flotation. Quartz and hematite samples contaminated with both Ca and Mg were subjected to microflotation assays at pH 10.5 with starch and etheramine, which showed that SHMP did not provide selectivity in the separation of these minerals. Zeta potential measurements, Fourier transform infrared spectroscopy of quartz and hematite without and with the studied reagents (starch, amine, SHMP, CaCl 2 /MgCl 2 ) and published studies in the literature indicated that although the HMP anions removed the Ca and Mg ions from both minerals, it also formed complexes with the Fe 3+ ions on the hematite surface, which prevented subsequent adsorption of starch and consequently decreased the selectivity for reverse flotation of iron ore.
ISSN:0882-7508
1547-7401
DOI:10.1080/08827508.2024.2327037