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首页> 外文期刊>Journal of Mining and Metallurgy, Section B: Metallurgy >Improving reducibility of iron ore pellets by optimization of physical parameters
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Improving reducibility of iron ore pellets by optimization of physical parameters

机译:通过优化物理参数提高铁矿石球团的还原性

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Reducibility of iron bearing material is an important property which represents its suitability of reduction in iron making furnaces. It has direct influence on improving productivity and lowering energy consumption in iron making process. The reducibility of iron ore pellets of a specific chemistry can be improved by the optimization of physical parameters such as induration temperature, improving size distribution of fines, improving apparent porosity etc. In this study, the reference pellet is prepared in a typical plant condition and the properties of the reference pellet are considered as base value to improve reducibility index (RI) maintaining other properties at the acceptable limit without altering pellet chemistry. Optimization of induration temperature at the 1250-1275oC shows around 74 % RI, which is 5 points more than the base value of 69.5 %. Furthermore, on optimizing additives size, such as limestone fines and anthracite coal fines at -350 mesh and induration temperature of 1250-1275oC, RI is improved to 77 %, i.e., 8 points improvement is achieved with respect to the base value.
机译:含铁材料的还原性是重要的性能,代表了其在炼铁炉中还原的适用性。它直接影响炼铁过程中生产率的提高和能耗的降低。通过优化物理参数(如硬化温度,改善细料的粒度分布,改善表观孔隙率等),可以提高特定化学性质的铁矿石球团的还原性。在本研究中,参考球团是在典型的工厂条件下制备的,参考颗粒的性能被认为是基准值,以提高还原性指数(RI),将其他性能保持在可接受的范围内,而不会改变颗粒的化学性质。在1250至1275oC的最佳硬化温度表明,RI约为74%,比69.5%的基准值高5个点。此外,通过优化添加剂的尺寸,例如在-350目和1200至1275oC的硬化温度下的石灰石细粉和无烟煤细粉,RI可提高至77%,即相对于基值可提高8点。

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