Author:
Sampaio Carlos Hoffmann,Ambrós Weslei Monteiro,Cazacliu Bogdan,Moncunill Josep Oliva,José David Selemane,Miltzarek Gerson Luis,Brum Irineu Antônio Schadach de,Petter Carlos Otávio,Fernandes Eunírio Zanetti,Oliveira Luis Felipe Silva
Abstract
This 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 destoning.
Subject
Geology,Geotechnical Engineering and Engineering Geology
Reference29 articles.
1. Global Coke Production 1993 to 2018 (in Million Metric Tons)https://www.statista.com/statistics/267891/global-coke-production-since-1993
2. World Crude Steel Production from 2012 to 2019 (in Million Metric Tons)https://www.statista.com/statistics/267264/world-crude-steel-production/
3. Coal for metallurgical coke production: predictions of coke quality and future requirements for cokemaking
4. New discoveries of coal in Mozambique — Development of the coal resource estimation methodology for International Resource Reporting Standards
5. Elementos traços em cinzas de carvões aflorantes de Moçambique;Vasconcelos;Geochim. Bras.,2009
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献