Method for quick assessment of cohesive ore flowability
Keywords: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.
Bandeira, D. J. A., Lima, M. J. N. da C., Oliveira, A. N. de., Branco, R. R. C., Nascimento, K. L. do, Costa, R. F., & Nascimento, J. J. da S. (2021). Propriedades Físicas e de fluxo de cultivares de feijão para o dimensionamento de silos verticais. Research, Society and Development, 10(12), e208101220347. https://doi.org/10.33448/rsd-v10i12.20347
Březina, R.; Filípek, J. & Šenberger, J. (2004). Application of ductile iron in the manufacture of ploughshares. Research in Agricultural Engineering, 50, (2): 75–80.
Białobrzeska, B.; Jasinski, R.; Konat, Ł. & Szczepanski, Ł.(2021). Analysis of the properties of Hardox extreme steel and possibilities of its applications in machinery. Metals, 11, 162. https://doi.org/10.3390/met11010162
Braskem. Braskem. (2020). Polietileno de Ultra alto peso molecular (UHMWPE). Retrieved April 7, 2022, from https://www.braskem.com.br/utec
Clayton, J. (2019). An Introduction to Powder Characterization. In: Handbook of Pharmaceutical Wet Granulation (pp. 569–613). Elsevier. https://doi.org/10.1016/b978-0-12-810460-6.00021-x
Dornelas, K. C., Silva, V. R. da, Pessoa, Y. C. C., & Nascimento, J. W. B. do. (2021). Propriedades físicas e de fluxo de produtos granulares para projeto de silo. Research, Society and Development, 10(10), e234101018754. https://doi.org/10.33448/rsd-v10i10.18754
Eutectic Castolin. (2017). CastoDur 450 — Placa de desgaste resistente ao impacto e à abrasão moderada. Available in: <http://www.eutectic.com.br/catalogos/folheto-castodur450-mineracao.pdf>. Accessed December 15, 2020.
Hao, T. (2015). Understanding empirical powder flowability criteria scaled by Hausner ratio or Carr index with the analogous viscosity concept. RSC Advances, v. 5, 57212 – 57215. DOI: 10.1039/c5ra07197f
Jenike, A. W. (1964). Storage and flow of solids. Bulletin 123, Engineering Experiment Station. Salt Lake City: University of Utah.
Jenike, A. W. (1989). Storage and flow of solids. Salt Lake City: Univ. of Utah.
Mano, E. B. (1991). Polímeros como materiais de Engenharia. 1.ª Edição. Rio de Janeiro: Editora Edgard Blücher.
Martin Engineering. (2019). Martin ARCOPLATE - Chapa de Desgaste. Available in: <https://martin-engineering.com.br/wp-content/uploads/2019/04/ET-DT-ARC_rev03-Data-Sheet-Arcoplate.pdf>. Accessed december 15, 2020.
Milhomem, F. O., & Luz, J. A. (2016). Experimentos simples para estudo de granéis. Holos, 3, 114. https://doi.org/10.15628/holos.2016.2126
Oliveira, B. J. et al. (2017, December 3–8). Microstructural and mechanical characterization of Hardox 450 steel. 24th ABCM International Congress of Mechanical Engineering, Curitiba, PR, Brazil.
Rastogi, S., Dhodapkar, S. V., Cabrejos, F., Baker, J., Weintraub, M., Klinzing, G. E., & Yang, W.-C. (1993). Survey of characterization techniques of dry ultrafine coals and their relationships to transport, handling and storage. Powder Technology, 74(1), 47–59. https://doi.org/10.1016/0032-5910(93)80007-w
Riley, G. S., & Mann, G. R. (1972). Effects of particle shape on angles of repose and bulk densities of a granular solid. Materials Research Bulletin, 7(2), 163–169. https://doi.org/10.1016/0025-5408(72)90273-5
Saw, H. Y., Davies, C. E., Paterson, A. H. J., & Jones, J. R. (2015). Correlation between powder flow properties measured by shear testing and Hausner ratio. Procedia Engineering, 102, 218–225. https://doi.org/10.1016/j.proeng.2015.01.132
Schulze, D. (2008). Powders and Bulk Solids: Behavior, Characterization, Storage and Flow. Springer-Verlag Berlin Heidelberg.
Silva, J. M. (2005). Estudo do fluxo de material fragmentado na mineração subterrânea, com o uso de modelos físicos. [Thesis]. Programa de Pós-Graduação em Engenharia Metalúrgica e de Minas. Belo Horizonte: Universidade Federal de Minas Gerais.
Silva, R. J. (2016). Caracterização de sistema tribológico e seleção de ligas para revestimento de chutes de transferência de minério. [Dissertation]. Programa de Pós-Graduação em Engenharia de Materiais. Belo Horizonte: CEFET-MG.
SSAB. (n. d.). Hardox wear plate- wear and abrasion resistant steel. Retrieved April 8, 2022, from https://www.ssab.com/products/brands/hardox
Woodcock, C. R.; Mason, J. S. (1995). Bulk solids handling: an introduction to the practice and technology. 3rd edition. London: Chapman and Hall.
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