Abstract
Various carbon contents in the MgO-C refractory were studied with respect to the oxidation resistance and the wetting behavior with slag. The bulk density, apparent porosity, cold crushing strength, oxidation rate, and mass loss rate of the fired MgO-C refractories with various carbon contents were measured and compared. The wetting and penetration behavior of the cured MgO-C refractory with the molten slag were observed in-situ. The contact angle and the shape parameters of molten slag, including the apparent radius, height, and volume were compared. The results showed that the regenerated MgO effectively restrained the carbon oxidation in the MgO-C refractory, which was more evident at the low carbon content refractory. The contact angle between the MgO-C refractory and the molten slag increased as the carbon content increased. The increased contact angle decreased the penetration of the molten slag.
Highlights
Carbon bonded magnesia (MgO-C) refractory is commonly used in the iron- and steelmaking process, especially in the lining of electric furnaces, converters, and ladles [1]
The oxidation resistance of the MgO-C refractories with various carbon contents were measured and compared by firing the refractories at 1400 ◦ C and 1600 ◦ C
The bulk density of the refractories markedly decreased after firing, which was more evident with the higher carbon content
Summary
Carbon bonded magnesia (MgO-C) refractory is commonly used in the iron- and steelmaking process, especially in the lining of electric furnaces, converters, and ladles [1]. 1500 ◦ C, it is necessary to study the oxidation behavior of the MgO-C refractory with various carbon contents at higher temperatures. There have been few efforts to investigate the effects of these factors on the slag corrosion resistance of the MgO-C refractory through altering its wettability with slag [24,25]. The oxidation resistance and the wettability characteristics were two vital factors regarding the service life of the MgO-C refractory. The oxidation experiments of the MgO-C refractories with various carbon contents were studied under different firing temperatures. The contact angle between the molten slag and the MgO-C refractories with various carbon contents were observed in-situ under an Ar atmosphere, and the wetting and penetration process of the molten slag within the
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