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dc.creatorHoffmann Sampaio, Carlos
dc.creatorMonteiro Ambrós, Weslei
dc.creatorCazacliu, Bogdan
dc.creatorOliva Moncunill, Josep
dc.creatorSelemane José, David
dc.creatorMiltzarek, Gerson Luis
dc.creatorSchadach de Brum, Irineu Antônio
dc.creatorPetter, Carlos Otávio
dc.creatorZanetti Fernandes, Eunírio
dc.creatorSilva Oliveira, Luis Felipe
dc.description.abstractThis paper proposes pre-beneficiation studies by air jigs of the coal layers from a Moatize coal deposit. Pre-beneficiation, also called destoning, removes tailings before the beneficiation plant. The air jigs operate in the same granulometric size range as the heavy-media cyclones (HMCs) that are installed in the preparation plant. With the destoning, the heavy-media circuit operates with a lower coal feed and higher organic matter contents, increasing its cutting efficiency and lowering operational costs. The use of air jigs reduces the total water consumption in the plant, which is especially important for the region where the plant is installed, as water is particularly scarce. Four coal layers of the Moatize coal deposit were studied, which are currently exploited in the mine. As main results of the study, it is possible to say that the concentration of lights (feed of the preparation plant) and heavies (waste fraction) in air jigs can be carried out with reasonable efficiencies for all coal layers studied, making air jigs a feasible option for coal
dc.publisherCorporación Universidad de la Costaspa
dc.rightsCC0 1.0 Universal*
dc.subjectAir jigspa
dc.subjectWaste separationspa
dc.subjectMoatize coalspa
dc.titleDestoning the moatize coal seam, Mozambique, by Dry Jiggingspa
dcterms.references1. Statista. Global Coke Production 1993 to 2018 (in Million Metric Tons). Available online: https://www.statista. com/statistics/267891/global-coke-production-since-1993 (accessed on 27 July 2020).spa
dcterms.references2. Statista. World Crude Steel Production from 2012 to 2019 (in Million Metric Tons). Available online: (accessed on 27 July 2020).spa
dcterms.references3. Díez, M.A.; Alvarez, R.; Barriocanal, C. Coal for metallurgical coke production: Predictions of coke quality and future requirements for cokemaking. Int. J. Coal Geol. 2002, 50, 389–412. [CrossRef]spa
dcterms.references4. Hatton, W.; Fardell, A. New discoveries of coal in Mozambique: Development of the coal resource estimation methodology for International Resource Reporting Standards. Int. J. Coal Geol. 2012, 89, 2–12. [CrossRef]spa
dcterms.references5. Vasconcelos, L.; Muchangos, A.; Siquela, E. Elementos traços em cinzas de carvões aflorantes de Moçambique. Geochim. Bras. 2009, 23, 344–
dcterms.references6. Cairncross, B. An overview of the Permian (Karoo) coal deposits of southern Africa. Afr. Earth Sci. 2001, 33, 529–562. [CrossRef]spa
dcterms.references7. Lakshminarayana, G. Geology of Barcode type coking coal seams, Mecondezi sub-basin, Moatize Coalfield, Mozambique. Int. J. Coal Geol. 2015, 146, 1–13. [CrossRef]spa
dcterms.references8. Vasconcelos, L. Geologia do Carvão: Caracterização geológica da Bacia de Moatize-Moçambique; UEM Universida de Eduardo Mondlane: Maputo, Mozambique, 2005. (In Portuguese)spa
dcterms.references9. Vale. 2018. Available online: (accessed on 10 November 2018).spa
dcterms.references10. José, D.S. Caracterização Tecnológica de Carvão ROM da Mina de Moatize–Moçambique Para o “Destoning”, Visando Seu Beneficiamento. Ph.D. Thesis, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil, 2018; p. 223. (In Portuguese)spa
dcterms.references11. Wills, B.A.; Finch, J.A. Mineral Processing Technology: An Introduction to the Practical Aspects of Ore Treatment and Mineral Recovery, 8th ed.; Butterworth-Heinemann: Oxford, UK,
dcterms.references12. Charan, G.T.; Chattopadhyay, U.S.; Singh, K.M.P.; Kabiraj, S.; Haldar, D.D. Pilot-Scale Baum Jig Washing for Beneficiation of a High-Ash Indian Non coking Coal. Int. J. Coal Prep. Util. 2009, 29, 130–139. [CrossRef]spa
dcterms.references13. Dwari, R.K.; Rao, K.H. Dry beneficiation of coal—A review. Miner. Process. Extr. Metall. Rev. 2007, 28, 177–234. [CrossRef]spa
dcterms.references14. Xia, W.; Xie, G.; Peng, Y. Recent advances in beneficiation for low rank coals. Powder Technol. 2015, 277, 206–221. [CrossRef]spa
dcterms.references15. Sampaio, C.H.; Aliaga, W.; Pacheco, E.T.; Petter, E.; Wotruba, H. Coal beneficiation of Candiota mine by dry jigging. Fuel Process. Technol. 2008, 89, 198–202. [CrossRef]spa
dcterms.references16. Boylu, F.; Talı, E.; Çetinel, T.; Çelik, M.S. Effect of fluidizing characteristics on upgrading of lignitic coals in gravity based air jig. Int. J. Miner. Process. 2014, 129, 27–35. [CrossRef]spa
dcterms.references17. Charan, T.G.; Chattopadhyay, U.S.; Singh, K.M.P.; Kabiraj, S.K.; Haldar, D.D. Beneficiation of high-ash, Indian non-coking coal by dry jigging. Min. Metall. Explor. 2011, 28, 21–
dcterms.references18. Boylu, F.; Çinku, K.; Çetinel, T.; Karaka¸s, F.; Güven, O.; Karaa ˘gaçlio ˘glu, I.E.; Çelik, M.S. Effect of coal moisture on the treatment of a lignitic coal through a semi-pilot-scale pneumatic stratification jig. Int. J. Coal Prep. Util. 2015, 35, 143–154. [CrossRef]spa
dcterms.references19. Ihedioha, J.I.; Okorie-kanu, C.O.; Iwuogo, U.M. Upgrading coal using a pneumatic density based separator. Int. J. Coal Prep. Util. 2008, 28, 51–
dcterms.references20. Zhao, Y.; Fu, Z.; Yang, L.Z.; Duan, C.; Song, S.; Cai, L. Fine Coal Dry Cleaning using an Air Dense Medium Fluidized Bed with Improved Magnetite Medium. Procedia Eng. 2015, 102, 1133–1141. [CrossRef]spa
dcterms.references21. Fu, Z.; Zhao, Y.; Yang, X.; Luo, Z.; Zhao, J. Fine coal beneficiation via air-dense medium fluidized beds with improved magnetite powders. Int. J. Coal Prep. Util. 2016, 36, 55–68. [CrossRef]spa
dcterms.references22. Xu, X.; Chen, J.; Luo, Z.; Tang, L.; Zhao, Y.; Lv, B.; Fu, Y.; Chen, C. Fluidization Characteristics of Air Dense Medium Agitated Separation Fluidized Bed with Different Distributors. Miner. Process. Extr. Metall. Rev. 2019, 40, 299–306. [CrossRef]spa
dcterms.references23. Nienhaus, K.; Pretz, T.; Wotruba, H. Sensor Technologies: Impulses for the Raw Materials Industry; Shaker Verlag GmbH: Düren, Germany, 2014; p.
dcterms.references24. Duan, C.-L.; He, Y.-Q.; Zhao, Y.-M.; He, J.-F.; Wen, B.F. Development and application of the active pulsing air classification. Proceed Earth Planet. Sci. 2009, 1, 667–
dcterms.references25. Das, A.; Sarkar, B. Advanced gravity concentration of fine particles: A review. Miner. Process.Extr. Metall. Rev. 2018, 39, 359–394. [CrossRef]spa
dcterms.references26. Weinstein, R.; Snoby, R. Advances in dry jigging improves coal quality. Min. Eng. 2007, 1, 29–
dcterms.references27. Snoby, R.; Thompson, K.; Mishra, S.; Snoby, B. Dry jigging coal: Case history performance. In Proceedings of the 2009 SME Annual Meeting, Denver, CO, USA, 22–25 February
dcterms.references28. Ambrós, W.M.; Sampaio, C.H.; Cazacliu, B.G.; Conceição, P.N.; Reis, G.S. Some observations on the influence of particle size and size distribution on stratification in pneumatic jigs. Powder Technol. 2019, 342, 594–606. [CrossRef]spa
dcterms.references29. Bird, B.M. Interpretation of float-and-sink data, Anais, II. Int. Conf. Bitum. Coal 1928, 2, 82–

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