Ore Classification
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Performance analysis of the beneficiation process of bauxite from the Juruti Mine. Industrial sampling and performance evaluation
Abstract Sampling campaigns were conducted at the industrial bauxite wash circuit of the Juruti Bauxite Mine in Pará, Brazil. The beneficiation circuit consisted of crushing, scrubber washing, wet screening, hydrocyclone classification, and fltration. Considering laboratory processing of samples and statistical analyses of historical operation databases, ma
REM - International Engineering Journal. Publicado em: 2022
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2. Indicator kriging applied to RMR geomechanical modelling in a Pb-Zn deposit case study
Abstract The opening of a mining enterprise requires knowledge of the geomechanical characteristics of the mineral deposit, which will be worked according to the use of parameters of stability and/or resistance of the material, as well as the discontinuities present in the rock. In this study, the Rock Mass Rating methodology was used to propose a geomechani
REM, Int. Eng. J.. Publicado em: 2021-06
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3. Open stope stability assessment through artificial intelligence
Abstract Underground mining is a set of methods that allows the extraction of ore in depth, ensuring sustainability and economic viability. One of the problems that arise in underground mine operations is open stope stability. The method for assessing stabil ity of open stopes is the stability graph proposed by Mathews et al. (1981). It is possible to estima
REM, Int. Eng. J.. Publicado em: 2020-09
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4. Comparative evaluation between mechanical and pneumatic cells for quartz flotation in the iron ore industry
Abstract Flotation plays a relevant role in the concentration of iron ores. Conventional flotation technology employing mechanical machines and columns and also circuits combining both types of cells have been utilized in the iron ore industry. The top size of particles in the flotation circuit feed is 150 µm and the slimes below 10 µm are removed as overf
REM, Int. Eng. J.. Publicado em: 2018-07
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5. ESTUDO GEOMETALÚRGICO DE GRANULADOS E PELOTA DE MINÉRIO DE MANGANÊS / ESTUDO GEOMETALÚRGICO DE GRANULADOS E PELOTA DE MINÉRIO DE MANGANÊS
Aiming to characterize intrinsic properties of granular products and pellets of manganese ore, this study proposes an experimental methodology to allow the evaluation and comparison of the quality of five lumpy manganese ores and a manganese pellet. The work presents chemistry, mineralogy, density, specific surface and porosity, in addition to the metallurgi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2011
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6. Caracterização de rejeitos de minério de ferro para uso em pavimentação / Characterization of iron ore tailings for use in paving
In this work it was carried out a series of laboratory tests towards chemical, mineralogical and geotechnical characterization of rejects from iron ore processing, for use in paving. Material sampling was done in specific points as they were generated during the beneficiation process along the cycle, in order to preserve their properties. The alternative app
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011
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7. REDES NEURAIS NA MANUTENÇÃO PREDITIVA DE CAMINHÕES FORA DE ESTRADA / NEURAL NETWORKS FOR PREDICTIVE MAINTENANCE ON OFF-HIGWAY TRUCKS
With the increasing demand for ore in the world, the complexity, size and price of mining equipment have increased considerably. As these machines have embedded monitoring technology, the use of such data to increase the reliability and availability of the equipment has become essential in order to reduce maintenance costs. The objective of this work is deve
Publicado em: 2009
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8. CARACTERIZAÇÃO TECNOLÓGICA NO APROVEITAMENTO DO REJEITO DE MINÉRIO DE FERRO
In this work is presented the characterization of the fines, stocked in I dam as tailing, proceeding from the ore treatment iron of the plant of the Córrego do Feijão mine, that in the year of 2008 had been generated 1,479,157 t. In the technological characterization of the samples, are presented size distribution by humid sieving, chemical characterizatio
Publicado em: 2009
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9. IRON ORE CHARACTERIZATION BY COMPUTER VISION / CARACTERIZAÇÃO DE MINÉRIO DE FERRO POR VISÃO COMPUTACIONAL
Ore classification is useful for understanding and controlling industrial beneficiation processes. The present work contributes to the developement of a computer vision system for automated classification of iron ores by image analysis of optical micrographs. For this purpose, morphological feature extraction algorithms were implemented and feature based cla
Publicado em: 2008
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10. SEGMENTAÇÃO DE GRÃOS DE HEMATITA EM AMOSTRAS DE MINÉRIO DE FERRO POR ANÁLISE DE IMAGENS DE LUZ POLARIZADA / HEMATITE GRAIN SEGMENTATION OF IRON ORE SAMPLES BY POLARIZED LIGHT IMAGE ANALYSIS
The aim of the present work is to classify co-registered pixels of stacks of polarized light images of iron ore into their respective crystalline grains or pores, thus producing grain segmented images that can be analyzed by their size, shape and orientation distributions, as well as their porosity and the size and morphology of the pores. Polished sections
Publicado em: 2008
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11. CO-SITE MICROSCOPY: NEW POSSIBILITIES IN THE ORE CHARACTERIZATION / MICROSCOPIA CO-LOCALIZADA: NOVAS POSSIBILIDADES NA CARACTERIZAÇÃO DE MINÉRIOS
Computer-controlled microscopes with digital image acquisition and analysis led to the creation of a new field, called Digital Microscopy. Digital Microscopy not only allows a certain degree of automation but also has brought new possibilities to microstructural characterization. One of these new and promising possibilities is Co- Site Microscopy, that links
Publicado em: 2007
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12. Investigação das Características dos Minérios de Ferro da CVRD que Influenciam seu Comportamento na Moagem
The main source of raw material to pelletizing plants is the fraction of iron ore naturally smaller than 6 mm and also the fines generated in the mines or in the beneficiation, classification, handling or transportation of the ore. In pelletizing plants, grinding is necessary to suit their specific surface area and size distribution to the pellet production
Publicado em: 2004