作者：E.Y. Sako, M.A.L. Braulio, E. Zinngrebe, S. van der Laan,V.C. Pandolfelli

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刊名：refractories worldforum

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出版年：2012-04-01

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期：2

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语种：英文

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内容简介

Alumina-spinel castables are usually applied as a refractory lining of steel ladles in regions where both volumetric stability and corrosion resistance are required. However, the addition of the traditional calcium aluminate cement as a binder agent in those refractories leads to residual expansion and reduces the basic slag resistance, mainly due to the CA6 (CaO-6Al2O3) formation. In this work, a novel approach was designed in order to improve the performance of these materials, by using alumina-based binder agents: hydratable alumina and colloidal alumina. The results highlighted a reduced corroded area after the slag tests for the latter, which was most likely associated with the decrease in the average pore size. Therefore, the use of these nano-scaled alumina particles points out a promising technique to produce alumina-spinel castables for key regions in the steel ladle.