EM - Escola de Minas

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/6

Notícias

A Escola de Minas de Ouro Preto foi fundada pelo cientista Claude Henri Gorceix e inaugurada em 12 de outubro de 1876.

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Filtros

2018 - 20192

Configurações

Autor: search.filters.author.Carias, Marina do CarmoTem arquivos: Sim

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2
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    Influence of moisture and particle size on coal blend bulk density.
    (2019) Braga, Erick Mitchell Henrique; Silva, Guilherme Liziero Ruggio da; Amaral, Rian Carlo Vieira; Carias, Marina do Carmo; Assis, Paulo Santos; Lemos, Leandro Rocha
    Coal blend bulk density is an important property in the coking process. Some variables, such as moisture and particle size, which are controlled or measured in the coal beneficiation process in steel mills, exert a strong influence on this feature. This study aims to understand the density variation of coal blends by the influence of moisture and particle size when using dry and wet bases. The investigations showed that higher density can be reached when drying the coal blend or even with excess of moisture by an agglomeration process. However, for a coal blend of lower moisture content, such as 4%, the better effects on the coking process are evident. Changes on the density from particle size require care, since they can fall in a region of high density achieved by larger particles or in a region with excess coal fines, where either or both can compromise the coke quality.
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    Effect of briquetting and coal moisture control processes on coke quality.
    (2018) Carias, Marina do Carmo; Silva, Guilherme Liziero Ruggio da; Assis, Paulo Santos; Santos, Cláudio Gouvêa dos
    Recently issues faced by cokemakers connected with availability of resources, coal quality and price, and environmental concerns have led to the development of coal pre-treatment. Aiming the use of semi-coking coal, technologies for increasing bulk density have been applied such as briquetting and coal moisture control (CMC) which have proved their benefits on manufacturing of a strong metallurgical coke. This work showed coke with high quality regarding bulk density, CSR, DI and coke % > 25 mm was produced from addition of briquettes 20% in the coal blend. For those cokes produced from CMC, coke containing moisture 4% in coal blend presented better properties than cokes with excessive moisture. It was disclosed the effect of briquettes 20% on coke quality is equivalent to produce coke with moisture 4%.