ABSTRACT This paper investigates the distribution of harmful elements in furnace burden and refractory of a water-quenched blast furnace X (BFX) through SEM images, EDS spectra and XRD results. The results show that zinc is mainly concentrated on the lumpy zone while the dominant enrichment region of alkali metal is the cohesive zone. The microstructure and XRD results of refractories in various locations indicate that the erosion caused by harmful elements begins on the hot outer surface of higher stack with the adhesion of zinc, while potassium then completely permeates into the first-layer refractory in the lower part of stack. The local expansion of volume caused by the introduction of harmful elements leads to the erosion of refractory, while the enhanced erosion from the throat to the bottom of the furnace can be explained by the rising temperature. Owing to the shifting location of the temperature isothermal, the harmful elements enrichment region transforms from hot outer surface of refractory at higher part of BFX to the cold inner surface at lower part of BFX.

中文翻译：

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解剖125m3高炉有害元素分布

摘要本文通过SEM图像、EDS光谱和XRD结果研究了水淬高炉X（BFX）炉料和耐火材料中有害元素的分布。结果表明，锌主要集中在块状区，而碱金属的主要富集区是粘结区。不同位置耐火材料的显微组织和XRD结果表明，有害元素的侵蚀开始于上层堆垛的热外表面，随着锌的附着，钾完全渗透到堆垛下部的第一层耐火材料中。 . 有害元素的引入引起的局部体积膨胀导致耐火材料的侵蚀，而从喉部到炉底的侵蚀增强可以用温度升高来解释。由于等温线位置的移动，有害元素富集区由BFX上部的高温耐火材料外表面向BFX下部的冷内表面转变。