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首页> 外文期刊>Journal of the European Ceramic Society >Corrosion of magnesium aluminate spinel-rich refractories by sulphur-containing slag
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Corrosion of magnesium aluminate spinel-rich refractories by sulphur-containing slag

机译：含硫矿渣对富铝尖晶石耐火材料的腐蚀

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摘要

Magnesium aluminate spinel-containing refractories are widely used as steel ladle linings and represent potential materials for other high temperature processes. In gasifiers, the refractories are in contact with calcium aluminosilicate-rich slags with high content of iron and sulphur. The effect of sulphur on the corrosion of spinel-rich castables has been investigated and analyzed by EDX and EBSD in SEM. In contact with coal slag at 1450 degrees C a spinel-rich crucible has shown areas of an initial dissolution, in which slag-surrounded micro-sized spinel grains are present. At the edge of the spinel grains, comparatively high proportions of S and Ca are detected. According to EBSD analysis no interphases are recognized. The grain size, the shape as well as the crystal quality of most of the fine spinel particles indicate rather a recrystallization after the corrosion test more than a gradual dissolution. In order to compare the obtained results, the precipitation of spinel during cooling has been reconstructed by means of thermochemical calculations using FactSage (TM) software. (C) 2014 Elsevier Ltd. All rights reserved.
机译：含铝酸镁尖晶石的耐火材料被广泛用作钢包衬里，并代表了其他高温工艺的潜在材料。在气化炉中，耐火材料与富含铁和硫的富含铝硅酸钙的炉渣接触。通过EDX和EBSD在SEM中研究和分析了硫对尖晶石型浇铸料腐蚀的影响。在1450摄氏度下与煤渣接触时，富含尖晶石的坩埚已显示出初始溶解区域，其中存在矿渣环绕的超细尖晶石晶粒。在尖晶石晶粒的边缘，检测到较高比例的S和Ca。根据EBSD分析，没有发现任何中间阶段。大多数尖晶石细颗粒的晶粒尺寸，形状和晶体质量表明，经过腐蚀测试后，其重结晶远大于逐渐溶解。为了比较所获得的结果，已经通过使用FactSage TM软件的热化学计算来重建尖晶石在冷却期间的沉淀。 （C）2014 Elsevier Ltd.保留所有权利。

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