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Influence of MgAl2O4 Spinel Addition on Properties of Alumina-Chrome Refractory Prepared with Alumina-Chrome Slag
J. Wu, J. Liu, R. Li, Q. Zhen
Research Center of Nano Science and Technology, Shanghai University, Shanghai 200444, China
received September 27, 2016, received in revised form October 31, 2016, accepted November 26, 2016
Vol. 7, No. 4, Pages 447-454 DOI: 10.4416/JCST2016-00076
Abstract
Alumina-chrome refractory was developed using alumina-chrome slag of different grades (5 ∼ 3 mm, 3 ∼ 1 mm, 0.088 mm and 0.045 mm), with added micron-grade MgAl2O4 spinel powders. Batch materials were milled, pressed and sintered at 1500 °C with 22 h soaking. The refractory with 5 wt% MgAl2O4 exhibited the best properties in terms of bulk density and apparent porosity. In all the refractory samples, new phases were formed as a result of slag-refractory and copper-refractory interaction. With the addition of MgAl2O4 spinel, the corrosion resistance of the alumina-chrome refractory was improved remarkably.
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Keywords
Alumina-chrome refractory, alumina-chrome slag, MgAl2O4 spinel, slag corrosion, crude copper corrosion
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