Influence of magnesia in the infiltration of magnesia-spinel refractory bricks by different clinkers

AUTOR(ES)

Gonçalves, Geraldo Eduardo, Pacheco, Graziella Rajão Cota, Brito, Modestino Alves de Moura, Silva, Sérgio Luiz Cabral da, Lins, Vanessa de Freitas Cunha

FONTE

Rem: Rev. Esc. Minas

DATA DE PUBLICAÇÃO

2015-12

RESUMO

Abstract In cement production, which involves the production of cement clinker in rotary kilns, the main refractories used are magnesia-spinel bricks. These bricks may suffer infiltration by the clinker liquid phase, resulting in the corrosion of the spinel and the formation of low refractoriness mineralogical phases, such as the Q phase (C20A13M3S3), which compromises refractory performance. Thus, the aim of this work is to correlate the infiltration resistance of magnesia-spinel bricks made from different grades of magnesia by clinker collected in three different cement plants (A, B and C). The purity of magnesia, besides its physical properties, strongly influences the properties and the infiltration resistance of magnesia-spinel bricks; as such the use of high grade magnesia is essential for producing high performance refractories.

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