熔铸耐火材料抗盖板玻璃熔体侵蚀行为研究

本文以熔铸耐火材料为研究对象进行抗盖板玻璃熔体侵蚀试验,采用化学分析、岩相分析和电子显微镜能谱分析等测试分析方法,对比研究钠钙玻璃熔体、高铝玻璃熔体和锂铝玻璃熔体对熔铸耐火材料的侵蚀行为。结果表明,玻璃熔体中的碱金属离子向耐火材料中的玻璃相扩散,导致玻璃相黏度降低,同时耐火材料中刚玉相溶解,斜锆石分散,主体结构遭到破坏,并形成界面层。界面层内存在富铝含锆的玻璃相,由于高铝玻璃和锂铝玻璃氧化铝含量高,表面张力大,界面层内的玻璃相聚集在试样周围且扩散慢,从而阻止了侵蚀的发展。玻璃熔体的侵蚀速率为钠钙玻璃熔体＞高铝玻璃熔体＞锂铝玻璃熔体。

Corrosion Resistance of Fused-Cast Refractory Materials by Molten Cover Lens

In this paper, corrosion resistance experiment on fused-cast refractory materials was performed to study the cast refractory materials. The erosion behaviors of soda-lime glass, high aluminum glass and lithium aluminum glass on fused-cast refractory materials were studied by chemical analysis, lithofacies analysis and electron microscopy spectroscopy analysis. The results show that the alkali metal ions in the molten glass diffuse to the glass phase of the refractory, which leads to the viscosity of the glass phase decrease. At the same time, the corundum phase dissolves and the inclined zircon disperses, then the main structure of the refractory is destroyed, and the interfacial layer is formed. There is a glass phase rich in aluminum and zirconium in the interface layer. Due to the high alumina content and high surface tension of high aluminum glass and lithium aluminum glass, the glass phase in the interface layer gathers around the sample and diffuses slowly, thus preventing the development of erosion. The erosion rate of the molten glass is: soda-lime glass>high aluminum glass>lithium aluminum glass.