Título: | PELLETIZING AND REDUCING OF MAGNETITE CONCENTRATE | ||||||||||||||||||||||||||||||||||||||||
Autor: |
EDUARDO SILVA MAIA |
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Colaborador(es): |
JOSE CARLOS D ABREU - Orientador |
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Catalogação: | 21/OUT/2011 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=18544&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=18544&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.18544 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
The global increasing trend of producing iron ore fines (sinter feed and pellet feed) has also increased the importance of the agglomeration processes, in particular the pelletizing, which has as main characteristic to produce high quality pellets with excellent mechanical resistance, besides being a less polluting process than the sintering. Currently, Brazilian mines exploit mainly hematite deposits (hematite and / or itabirite ores). Although the country has no tradition in exploiting magnetite minerals, there is a growing interest trend in magnetite occurrences, although it might be necessary to adequate mineral processing and pelletizing operating parameters when using such ore. This work is a result of an interaction between the company Metal Data S/A and the Siderurgy Group of the DEMa/PUC-Rio and describes the pelletizing process using magnetite iron ore from a Brazilian deposit in exploration stage, in order to evaluate its suitability for exploratory pellet production to be used as feedstock in the steel industry. The experimental procedures were divided into three steps - ore processing, pelletizing and reduction, aiming to define the ore treatment route and chemical, mechanical and metallurgical characteristics of the produced pellets. Three types of mixtures for pelletizing were analysed, involving eight different concentrates. The results indicated that the magnetite ore is likely to concentrate and capable of producing a pellet feed with adequate quality, using a processing route with typical unit operations. It was observed that this materal has a potential for the formation of green pellets in the laboratory pelletizing disc and, after burning operations, produced pellets that had particle size between 9.5 and 16.0 mm, compression strength from 126 to 339 kg / pellet, tumble index from 67.7 to 94.9%, porosity from 23.8 to 40.74%, degree of metallization from 30 to 75%, among others.
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