中文摘要：

针对鞍钢氧化球团回转窑中的结圈问题，通过对结圈物物化性能和宏观及显微结构的分析，系统地研究了各结圈物形成的机理。结果表明：活性较高的次生Fe2O3易形成结构疏松的结圈物，或粘附在球团表面将球团聚形成结圈物；Fe2O3粉末由于其再结晶固结作用而易形成结构致密的结圈物，并在此过程中可能包裹少量球团或在高温区与球团一起形成熔蚀葡萄状结圈物。导致结圈的最主要原因是预热效果不良和煤灰的掺入，在此基础上，有针对性地提出了改善球团预热效果和燃煤量的措施，并取得较明显的缓解结圈的效果。

英文摘要：

In view of the ringing problem of rotary kiln for oxidized pellet in Ansteel,through the analysis of physical and chemical properties of tings and its macro and micro structure, the mechanism of ringing formation was studied systematically. The results show that,the highly active secondary Fe203 powder can easily forul a loose ring and adhere to pellet surfaces to form a ring by agglomerating pellets;A compact ring can be easily caused by Fe304 powder as a consequence of recrystallization con- solidation, meanwhile a small amount of pellets can be encapsulated during the ringing and generate a botryoid ring by melting Fen04 powder with pellet together in the high temperature area. The reasons for kiln ringing primarily lie in the poor preheating effect and the mix of coal ash. Based on this, effective measures of improving the pellet preheating effect and coal quality were presented, and the ringing was alleviated obviously.