Reverse cationic flotation of iron ore by amide-amine : bench studies.
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Date
2022
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Abstract
This study evaluated the performance of a new collector amide-amine compared with a
traditional etheramine in conventional reverse cationic flotation of a siliceous itabirite
sample of the Quadrilatero Ferrı ́fero (d80 1⁄4 116 mm, 40% Fe and 41.2% SiO2). Statistical
design of experiments was used to determine the influence of pH, collector and starch
dosages on mass and Fe recoveries, Fe and SiO2 grade in the concentrate, Fe grade in the
tailings and Gaudin's selectivity index (S.I). For the amide-amine, starch had no significant
effect on mass recovery and in the Fe and SiO2 grade in the concentrate. For the same
dosages, it was found that amide-amine was less selective than etheramine. However, at
higher dosages, at pH 8 and without starch, concentrates with Fe >65% and SiO2 <5%
grades were obtained, similar to the grades obtained with etheramine and starch at pH
10.5. The mass and Fe recoveries were higher and consequently, the Fe grades in the
tailings were lower. These results indicate that, despite the higher dosage required, amide-
amine is selective without starch, which is very interesting from the economic point of
view and simplification of the process route, implying a great potential for its industrial
application.
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Keywords
Quartz, Hematite, Etheramine acetate
Citation
ROCHA, G. M. Reverse cationic flotation of iron ore by amide-amine: bench studies. Journal of Materials Research and Technology, v. 18, p. 223-230, 2022. Disponível em: <https://www.sciencedirect.com/science/article/pii/S2238785422002095>. Acesso em: 29 abr. 2022.