Grain Gradation Design for Al2O3-MgO-C Refractories Based on Close Packing Theories

Shu Mao Zhao; Wei Yang; Jie Sun; Zhi Xie

doi:10.4028/www.scientific.net/AMR.508.63

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 508Grain Gradation Design for Al2O3-MgO-C...

Grain Gradation Design for Al₂O₃-MgO-C Refractories Based on Close Packing Theories

Abstract:

In this study, raw materials in five different commercially available size ranges were mixed to prepare blank for Al₂O₃-MgO-C refractories. In the light of close packing theory, the optimization model for getting the optimum grain gradation was founded. And optimum ratio for raw materials of different size and distribution character was concluded by solving the model to obtain closest packing. The result shows that stacking density and tap density of the blank came from the particle mixture with optimized grain gradation reached 1.46 and 1.70g/cm³ individually, both were higher than those of the blank made of mixture according to empirical grain gradation. And the microstructures observation result indicated that the voids among aggregate particles in the refractory came from the mixture with optimized grain gradation were separated into small and discrete ones while they were bigger in the refractory produced following empirical grain gradation.

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Periodical:

Advanced Materials Research (Volume 508)

Pages:

63-66

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.508.63

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Online since:

April 2012

Authors:

Shu Mao Zhao, Wei Yang, Jie Sun, Zhi Xie

Keywords:

Al₂O₃-MgO-C, Close Packing Theory, Optimization Model, Particle Size Distribution

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