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首页> 外文期刊>ISIJ international >Phosphorus Removal of High Phosphorous Oolitic Iron Ore with Acid-Leaching Fluidized-Reduction and Melt-Separation Process
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Phosphorus Removal of High Phosphorous Oolitic Iron Ore with Acid-Leaching Fluidized-Reduction and Melt-Separation Process

机译：酸浸流化还原-熔体分离法脱除高磷橄榄铁矿石中的磷

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摘要

A process with acid leaching followed by hydrogen-based fluidized reduction and melt separation is presented for recovering DRI (direct reduced iron) from high-phosphorus oolitic hematite in this study, and the aim of this study is to provide theoretical and technical basis for economical and rational use of high phosphorus oolitic iron ores. The reducibility of the ore can be improved by acid leaching, which is caused by the formation of voids in the ore particles after acid leaching and enhancing the internal gas diffusion. The phosphorus content in the DRI is still relative high even though there is no carbon in DRI, and it can be decreased to 0.087 wt% (raw ore 1.2 wt%) with the optimum condition in this study. It is proved that P exists in the DRI recovered from melt separation in the form of P_(2)O_(5) inclusions or Fe_(x)P as solid solutions, while not in the form of Ca_(3)(PO_(4))_(2) inclusions. Finally, a combined flowsheet for the treatment of high phosphorus oolitic iron ore is designed in this study.
机译：提出了一种酸浸法，然后进行氢基流化还原和熔体分离的方法，用于从高磷橄榄石赤铁矿中回收DRI（直接还原铁），该研究的目的是为经济上的应用提供理论和技术基础。合理使用高磷橄榄铁矿石。通过酸浸可以提高矿石的还原性，酸浸是由于酸浸后矿石颗粒中形成空隙并增强内部气体扩散引起的。即使DRI中没有碳，DRI中的磷含量仍然相对较高，在本研究的最佳条件下，磷含量可降低至0.087 wt％（原矿1.2 wt％）。证明从熔体分离回收的DRI中以P_（2）O_（5）夹杂物或Fe_（x）P固溶体形式存在，而不以Ca_（3）（PO_（4）形式存在））_（2）包含物。最后，在本研究中设计了一种组合流程图，用于处理高磷橄榄铁矿石。

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