Evaluation of carbon effect in mould fluxes for continuous casting of steel. / Avaliação do efeito do carbono em fluxantes para lingotamento contínuo de aços.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

In order to assure good performance of mould flux for continuous casting of steel, the chemical composition definition is important to guarantee the properties needs to its perfect behavior in the mould. Carbon is added to the mould flux to control the melting rate, since this property is related to the availability of liquid slag to fill in the gap between the solidified steel and the cupper wall that assure a perfect lubrication. This work presents the influence of two carbon sources evaluated by an apparatus designed for testing the melting rate of mould fluxes. It is an electric resistance furnace in which two perforated at the bottom crucibles contain flux sample in natura. One of the crucibles is used for the reference sample. As the temperature increases and the melting of the flux takes place, liquid slag starts dropping from the crucible, which is attached to a load cell. Weight losses and temperature are simultaneously recorded and a plot of mass (grams) versus temperature (degree Celsius) is produced. The effect of carbon content of the flux mixtures on the melting rate has been investigated. The heating microscope and thermal analysis were also evaluated.

ASSUNTO(S)

fluxantes continuous casting of steel mould fluxes lingotamento contínuo de aços

ACESSO AO ARTIGO

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