Per: Daniella Christina Pereira (Universidade federal de minas gerais), Leonardo Junior Fernandes Campos (Universidade federal de minas gerais), Andréia Bicalho Henriques (Universidade federal de minas gerais), Geriane Macedo Rocha (Universidade federal de minas gerais)
Abstract:
This study evaluated the use of a mixed collector formed between sulfosuccinamate and amide-amine in the hematite and quartz flotation, in comparison with the mixture between sulfosuccinamate and etheramine, and sulfosuccinamate in its isolated form, through microflotation tests. The mass ratio etheramine or amide-amine: sulfoccinnamate used in the composition of the mixed collector was 1:5, the depressant, when used, was sodium silicate and the pHs evaluated were 7 and 9. The amide-amine/sulfosuccinamate mixed collector did not present a positive synergistic effect, leading to higher flotability of quartz than hematite, and therefore, its application in direct anionic flotation of iron ore is not recommended. The mixed etheramine/sulfoccinnamate collector obtained higher hematite flotation than sulfosuccinamate in its isolated form at pH 9, but at pH 7 the flotability was lower. Sulfosuccinamate in its isolated form, at pH 7, showed a large selectivity window (~ 70%) between quartz and hematite flotation, even in the absence of depressant.