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Improvement of Sinter Productivity by Control of Magnetite Ore Segregation in Sintering Bed

机译：通过控制烧结床中磁铁矿的偏析提高烧结矿的生产率

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Recently, the quality of sinter feed ore used in sintering process has deteriorated. In particular, T.Fe has decreased and gangue component has increased in the sinter feed ore. Increase of gangue is not only the factor to influence sinter qualities, but also the factor to increase coke ratio in the blast furnace operation as the increase of slag ratio. Therefore, to cope with the deterioration of iron ore qualities, studies on alternative iron ore resources and development of its utilization technology have been required.In that kind of new iron ore resources, authors focus on high grade magnetite fine. In the past, there are some studies about the effect of mixing ratio and size of magnetite fine on productivity and quality, but there are few studies about magnetite fine segregation in charging. In addition, magnetite fine decreases sinter productivity by the decrease of permeability of sintering bed. A new study for using large amount of magnetite fine is required.In this research, the control method of magnetite fine segregation by magnetic force at charging and the improvement of sinter productivity by this method was studied. The effect of upper segregation of magnetite fine was studied through the analysis of melting behavior and interfacial reaction of calcium ferrite melts into hematite substrate and magnetite substrate.
机译：近来，用于烧结过程的烧结进料矿石的质量已经下降。特别地，在烧结进料矿石中，T.Fe降低，脉石成分增加。煤gang石的增加不仅是影响烧结矿质量的因素，而且还是高炉操作中随着炉渣比的增加而增加焦炭比的因素。因此，为了应对铁矿石质量的下降，需要对替代铁矿石资源进行研究并开发其利用技术。在这种新的铁矿石资源中，作者集中于高品位磁铁矿。过去，关于磁铁矿粉的混合比例和大小对生产率和质量的影响已有一些研究，但是关于装料中磁铁矿粉偏析的研究很少。另外，磁铁矿细粉通过降低烧结床的渗透性而降低了烧结生产率。需要大量使用磁铁矿细粉的新研究。本研究研究了带电磁力控制磁铁矿细粉偏析的方法，以及利用该方法提高烧结矿生产率的方法。通过分析铁素体钙在赤铁矿基体和磁铁矿基体中的熔融行为和界面反应，研究了磁铁矿细粉上部偏析的影响。

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