New collectors and depressants for apatite flotation

Referencia Apresentador Autores
Elenice Maria Schons Silva Silva, A.C.(Universidade Federal de Goiás); Silva, E.M.(Universidade Federal de Goiás); The crescent demand for raw material has increase mining activities. Mineral industry faces the challenge of process more complexes ores, with very small particles, and low grade, together with the constant pressure to reduce production costs and environment impacts. Froth flotation deserves special attention among the concentration methods for mineral processing. Besides its great selectivity for different minerals, flotation is a high efficient method to process fine particles. The process is based on the minerals surficial physicochemical properties and the separation is only possible with the aid of chemicals such as collectors, frothers, modifiers, and depressants. In order to use sustainable and eco-friendly reagents, oils extracted from fruits (especially from Brazilian savanna) and an alternative starch source (sorghum) had been tested. Apatite samples were characterized by SEM, EDS, XRD, XRF, and had their zeta potential measured. The results show a great potential for the new collectors, with apatite flotability equal or higher than compared with the reagents industrially adopted nowadays. The results for sorghum were compatible with the results for cornstarch, indicating that this cereal can be a feasible substitute for corn as a starch source.
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