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.
All the contents of this work, except where otherwise noted, is licensed under a Creative Commons Attribution 4.0 International license. Todo o conteúdo deste trabalho, exceto quando houver ressalva, é publicado sob a licença Creative Commons Atribição 4.0. Todo el contenido de esta obra, excepto donde se indique lo contrario, está bajo licencia de la licencia Creative Commons Reconocimento 4.0.
RESUMOO ensino da mineração no Brasil se inicia em 1876 com a criação da Escola de Minas de Ouro Preto por Claude-Henri Gorceix. Desde então, várias escolas de nível superior, e mais tarde, de nível técnico foram criadas em diversas regiões do país ao longo dos anos. Somente em 1944, após reforma do sistema educacional, que foi criado o curso técnico de Metalurgia e Mineração em Ouro Preto, funcionando inicialmente no prédio da Escola de Minas até 1964. A partir de 1965, a escola já na nova sede é renomeada para Escola Técnica Federal de Ouro Preto (ETFOP). Atualmente a antiga ETFOP é um campus do Instituto Federal de Minas Gerais (IFMG). Este trabalho tem por objetivo apresentar o perfil dos ex-alunos do curso técnico em Mineração do IFMG -Campus Ouro Preto de diferentes épocas, a partir de pesquisa on-line realizada com 85 egressos, fazendo um paralelo entre os desafios atuais da área e as propostas acadêmicas do Instituto Federal. Mesmo com as várias mudanças desde a sua criação, o curso se mantém com uma boa inserção no mercado e a qualidade do ensino ainda é base para um bom desempenho dos ex-alunos nas universidades.
delivering value in a fast and systematic way. The workflow consists of: identification of opportunities, process modelling, regulatory control improvement, definition of advanced control strategies, configuration and implementation, followed by training of the plant operators. It is expected a period that ranges from one to two months of project to deliver the System. This document presents a case of success in a crushing line of iron ore.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.