Volume : 3, Issue : 6, JUN 2017

REVISITING HELIX CLASSIFIERS

José Aurélio Medeiros da Luz

Abstract

Helix classifier is a classic equipment in ore dressing. The aim of this study was to provide engineering students and process engineerswith a new method to sizing simplex, duplex and triplex helix classifiers. It was developed from particuology, fluid dynamics and literature data. New formulae for classifier calculation and sizing were accomplished. The resulting construct allows the straightforward development of computer software in order to size this equipment, with only the fluid density and viscosity and basic properties of the granular system being processed as input.

Keywords

Size Separation, Spiral, Settling.

Article : Download PDF

Cite This Article

Article No : 9

Number of Downloads : 785

References

1. ALMENDRA, E. R. Velocidade de Sedimentação de Sistemas Particulados. Rio de Janeiro: COPPE/UFRJ, 1979. 88 pp. 2. ARSENIJEVIC, Z, Lj.et alii.Determination of non-spherical particle terminal velocity using particulate expansion data. Powder Technology.Vol. 103, 1999; pp. 265–273. 3. BERALDO, J. L. Moagem de Minérios em Moinhos Tubulares. São Paulo: Edgard Blucher, 1987. 143 pp. 4. DI FELICE, R. Liquid suspensions of single and binary component solid particles—An overview. China Particuology. V. 5 (2007); pp: 312–320. 5. FITCH, B; ROBERTS,E. J. in: Weiss, N. L. (Ed) SME Mineral Processing Handbook, AIME, 1985, pp. 3D 1-10. 6. GAUDIN, A. M. Principles of Mineral Dressing. New York: Mcgraw – Hill, 1975. 7. GELDART, D. Estimation of Basic Particle Properties for Use in Fluid-Particle Process Calculations. Powder Technology. Volume 60, n. 1, January 1990, Pages 1-13. 8. GUPTA, A. & YAN, D. S. Mineral Processing Design and Operations: an Introduction. Amsterdam: Elsevier, 2006. 718 p. 9. KING, P. Modeling and Simulation of Mineral Processing Systems. Boston: Butterworth-Heinemann, 2001.403 pp. 10. KROETZ, T. O efeito da “crise do arrasto” no mergulho de altura (Theeffectof “dragcrisis”onplungedive). Revista Brasileira de Ensino de Física, v. 35, n. 3, 3308 (2013). 11. LUZ, J. A. M. Aspectos Reológicos de Polpas em Sedimentação. In: Congresso Anual da ABM, 2009, Belo Horizonte. Anais do 64o. Congresso da ABM. São Paulo: ABM, 2009. v. 1. p. 1-11. 12. LUZ, J. A. M. Conversibilidade entre distribuições probabilísticas usadas em modelos de hidrociclones. Revista Escola de Minas, Ouro Preto, V. 58(1), pp: 89-93, janeiro/março, 2005. 13. MASSARANI, Giulio. Fluidodinâmica em Sistemas Particulados (2ª ed.). Rio de Janeiro: E-papers.2002. 152 p.14. MULAR, A.SizeSeparation. In: FUERSTENAU, M. & HAN, K. N. Principle of Mineral Processing. Littleton: SME, 2003. Chapter 4, p. 119-172. 15. PLITT, L. R. A Mathematical Model of the Hydrocyclone Classifier. CIM Bulletin. December, 1976. pp. 114 – 123. 16. RABONE, Ph.. Flotation Plant Practice (4th ed.). London: Mining Publications, 1957. 255 pp. 17. RAZUMOV, K. A. & PEROV, V. A.Proyectos deFábricas de Preparación de Minerales.Moscú: Mir, 1985. 18. REED, W. M. Sizing and Application of Gravity Classifiers. In: Mular, A. et. Alii (ed.). Mineral Processing Plant – a Design, Practice, and Control Proceedings. Littleton: SME, 2002. 19. SHOEMAKER, D. P. et alii. Experiments in Physical Chemistry. McGraw-Hill. New York, 1989. 20. WILLS, B.; NAPIER-MUNN, T. J. Will’s Mineral Processing Technology (7th ed.). Burlington: Butterworth-Heinemann, 2006.