Method for quick assessment of cohesive ore flowability




Bulk solid handling; Natural moisture; Cohesive ore; Coating; Rheology.


Beneficiation of iron ore with natural moisture has become increasingly relevant, either due to restrictions on wet operations, which result in disposal of tailings in dams, or due to the possibility of ready blending of various ore types. A great difficulty in these operations is handling of hydrated ores, with the presence of clay minerals, or with a higher moisture content. Effective techniques to facilitate handling emerge as the main challenge to make it possible to treat these ores under natural moisture in different plants around the world. This work aims at presenting a method for expeditious appraisal of the flowability of cohesive ore. A sample of iron ore from Mina do Pico, Brazil, was used in this study. The flowability was investigated under different conditions, using a bench scale rectangular trough with controlled slope. The following liners were studied: ASTM A-36 carbon (CDP), ultra-high molecular weight polyethylene (UHMW), Hardox, natural rubber, Arcoplate and polyurethane. UHMW resulted in the best flow efficiency and the lowest friction angle between bulk ore and the lined wall. Vibration as an ancillary agent for mechanical discharge significantly improved the flow efficiency.

Author Biography

Paulo César Gonçalves, Vale S/A

Plant operation coordinator at Vale S/A; master in mineral engineering (ore treatment) from the School of Mines of the Federal University of Ouro Preto (2021), postgraduate in production management from the Federal University of Viçosa (2012); mechanical industrial engineer from the Federal University of São João Del Rey (2009). Twenty-one years of experience in the area of iron ore beneficiation. Currently coordinator of operational process control of Mina de Fábrica plant, in Congonhas (MG, Brazil).


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How to Cite

GONÇALVES, P. C.; LUZ, J. A. M. da. Method for quick assessment of cohesive ore flowability. Research, Society and Development, [S. l.], v. 11, n. 10, p. e232111029005, 2022. DOI: 10.33448/rsd-v11i10.29005. Disponível em: Acesso em: 4 oct. 2022.