Anais dos Seminários de Redução, Minério de Ferro e Aglomeração


ISSN 2594-357X

Título

ON THE DIFFERENCE BETWEEN ISOTHERMAL AND NON-ISOTHERMAL REDUCTION TESTS: A COMPARISON BETWEEN COREM R180 AND ISO DR90

ON THE DIFFERENCE BETWEEN ISOTHERMAL AND NON-ISOTHERMAL REDUCTION TESTS: A COMPARISON BETWEEN COREM R180 AND ISO DR90

DOI

10.5151/2594-357X-33914

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Resumo

The reduction behavior of iron ore pellets in gas-based DR shaft processes has been studied at COREM since the late 80s. At that time, a new DR characterization test called COREM R180 was developped in collaboration with ArcelorMittal Mines Canada (former Quebec Cartier Mining) and ArcelorMittal Long Products Canada (former ISPAT Sidbec Inc.). This paper describes COREM’s approach to improve its understanding of the relations between iron ore pellet microstructure and pellet quality. The differences between the DR90 and the R180 tests are discussed. The evolution of the microstructure during reduction of both tests is also described. The reduction steps during the two tests are put forward as an important factor impacting the microstructural changes as well as the test results.

 

The reduction behavior of iron ore pellets in gas-based DR shaft processes has been studied at COREM since the late 80s. At that time, a new DR characterization test called COREM R180 was developped in collaboration with ArcelorMittal Mines Canada (former Quebec Cartier Mining) and ArcelorMittal Long Products Canada (former ISPAT Sidbec Inc.). This paper describes COREM’s approach to improve its understanding of the relations between iron ore pellet microstructure and pellet quality. The differences between the DR90 and the R180 tests are discussed. The evolution of the microstructure during reduction of both tests is also described. The reduction steps during the two tests are put forward as an important factor impacting the microstructural changes as well as the test results.

Palavras-chave

Iron ore pellets, Optical microscopy, metallisation, Direct reduction, DR90, COREM R180.

Iron ore pellets, Optical microscopy, metallisation, Direct reduction, DR90, COREM R180.

Como citar

Laforest, Guylaine; Dubé, Mathieu; Lacroix, Olivier. ON THE DIFFERENCE BETWEEN ISOTHERMAL AND NON-ISOTHERMAL REDUCTION TESTS: A COMPARISON BETWEEN COREM R180 AND ISO DR90 , p. 340-351. In: 7° Simpósio Brasileiro de Aglomeração de Minérios, São Paulo, 2019.
ISSN: 2594-357X , DOI 10.5151/2594-357X-33914