Summarized Achievements of the Porous Meso-mosaic Texture Sinter Research Project
Summarized Achievements of the Porous Meso-mosaic Texture Sinter Research Project
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多孔细观马赛克织构烧结矿研究项目成果总结
DOI：
10.2355/isijinternational.45.414
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Usui
中科院分区：
文献类型：
--
作者：
Takazo Kawaguchi;T. Usui
为了克服在烧结中大量使用针铁矿的困难，同时提高烧结矿的质量，在2001 - 2004财政年度，ISIJ成立了多孔细看镶嵌结构烧结研究小组。特别是，自本研究项目开始以来，认为Marra Mamba针铁矿的比例迅速增加，日本综合钢铁工业所需的烧结矿数量难以令人满意，因为Marra Mamba矿具有高组合含水量和高孔隙率，预计不适合烧结。为此，对针铁矿的使用方法进行了研究，并对影响针铁矿熔化行为的低渣比进行了研究。各高校开展了造粒、团聚、高炉反应评价等基础研究，提出了“多孔细观镶嵌结构烧结”新工艺，期望在烧结低渣、高针铁矿比条件下同时实现高强度、高还原性。结合这些基础研究，探讨了烧结理论和原料/烧结/高炉工艺的工程基础，探索了一种基于改进原料制粒工艺的“多孔细观镶嵌结构烧结”新工艺。因此，提出了MEBIOS（镶嵌嵌入铁矿烧结）方法，该方法涉及在烧结感应床中排列致密的预粒化球团（烧成固化床），其原料成分能够在正常烧结条件下形成合适的孔隙网络。
Research Group on Porous Meso-mosaic Texture Sinter in ISIJ was established from 2001 to 2004 fiscal years to overcome difficulties to use the great amount of goethite in sintering and at the same time to improve the sinter quality. Especially, since the beginning of the present research project the ratio of Marra Mamba goethitic ore was considered to increase rapidly, and the amount of sinter necessary for the Japanese integrated steel industries was thought hard to be produced satisfactorily, because Marra Mamba ore having high combined water content and high porosity was expected unsuitable for sintering. Therefore, the method of using goethite had been studied and the combination with low slag ratio important for melting behavior of goethite was investigated.Each university had been engaged in basic research such as granulation, agglomeration, evaluation of reaction in a blast furnace to propose a new process for “porous meso-mosaic texture sinter” which was anticipated simultaneously to realize high strength and high reducibility under the conditions of low slag and high goethite ratio in sintering.By combining these basic researches, the theory of agglomeration and the engineering foundation for raw material/sintering/blast furnace process were discussed and a new process for “porous meso-mosaic texture sinter” based on improving granulation process of raw material was searched. As a result, proposed was the MEBIOS (Mosaic Embedding Iron Ore Sintering) method which involved arranging dense pre-granulated pellets (firing cured bed) in a sinter induction bed with a raw material composition capable of forming a suitable void network under normal sintering conditions.