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The Effect of MgO-Al2O3 Spinel on Refractory Bricks Made from Al2O3-Cr2O3 Slag

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Abstract:

The Al2O3-Cr2O3 slag as raw material was analyzed by scanning electron microscopy (SEM). The effects of different size distribution of MgO-Al2O3 spinel grain on physical properties of refractory bricks made from Al2O3-Cr2O3 slag was studied according to YB/T376.1-1995（water quenching）, GB/T 5072－1985, GB/T 2997-1982 criterion. The results show that the main crystal phase of the refractory bricks were chromium corundum, corundum. The refractory bricks containing 10 wt% of the maximum size of 3.0 mm of MgO-Al2O3 spinel grain can significantly improve the thermal shock resistance of this refractory bricks. At the meanwhile, This kind of refractory bricks can be absolutely satisfied with the requirements about cold crushing strength, bulk density and apparent porosity.

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Periodical:

Advanced Materials Research (Volumes 291-294)

Pages:

1795-1799

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.291-294.1795

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Online since:

July 2011

Authors:

Li Jun Zheng, Guo Dong Zhang, Dian Li Qu, Feng Liu

Keywords:

Al2O3-Cr2O3 Slag, Mgo-Al2O3 Spinel, Refractory, Thermal Shock Resistance

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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