ResumoO objetivo deste trabalho foi avaliar a utilização de peneiras de alta frequência em circuitos de beneficiamento mineral. Foram testadas diferentes aberturas de telas (mm), taxa de alimentação (t/h) e percentual de sólidos para verificar a eficiência global de peneiramento na fração 0.15mm. Frações retidas nesta malha têm sido apontadas como críticas para a flotação, sobretudo flotação em colunas. O circuito clássico das usinas normalmente utiliza ciclones para classificação de partículas finas (<1mm) e assim a peneira de alta frequência surge como uma alternativa frente a este equipamento. Palavras-chave: Flotação; partículas grosseiras; Peneiras de alta frequência. HIGH FREQUENCY SCREENS IN MINERAL PROCESSING AbstractThe aim of this study was to evaluate the use of high-frequency screens in mineral processing circuits. Different screen openings (mm), feed rate (t/h) and solids content were tested to verify the overall efficiency of screening in the fraction 0.15 mm. Fractions retained in this mesh have been identified as critical for flotation, especially columns flotation. The classic circuit of plants typically utilizes cyclones for classification of fine particles (<1mm) and high-frequency screen appears as an alternative front of these equipment.
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