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首页> 外文期刊>ISIJ international >In situ Phase Analysis during Self-sintering of BOS Filter Cake for Improved Recycling
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In situ Phase Analysis during Self-sintering of BOS Filter Cake for Improved Recycling

机译：原位在博斯滤饼自烧结过程中的相位分​​析，以改善再循环

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The self-sintering of basic oxygen steelmaking (BOS) filter cake has been studied using in situ high temperature X-ray diffraction (XRD) during heating in air from room temperature to 1273 K. The aim of the study was to improve the understanding of the self-sintering process, using this in situ method to identify what reactions occur at different temperature ranges.The in situ phase analysis measurements correspond well, and are consistent with, the previously reported characteristics of BOS filter cake oxidation. However, the in situ measurements have allowed a more detailed analysis of the reactions taking place over the temperature ranges studied. Wüstite was the first component of the BOS filter cake to react with air, reacting at temperatures of approximately 373 K to 773 K to form a magnetite-zinc ferrite spinel solid solution. The reaction of metallic iron began at higher temperatures than wüstite, beginning at ~633 K and finishing at ~873 K. The decomposition of fluxes (mainly CaCO_(3)) occurred at temperatures above 873 K. At temperatures higher still, at approximately 1073 K, hematite reacted with zinc oxide to form zinc ferrite.The knowledge that wüstite reacts at the lowest temperatures is an improvement in the understanding of the self-sintering of BOS filter cake, and may give insights into the initiation of the self-sintering process. This improved understanding will aid analysis and approaches focused on process optimisation to increase the amount of filter cake that can be recycled back to the BOS.
机译：在从室温的空气中加热至1273k的空气中，使用在原位高温X射线衍射（XRD）中研究了碱性氧炼钢（BOS）滤饼的自烧结。对该研究的目的是改善对自烧结过程的理解，使用这种原位方法来识别在不同温度范围内发生的反应。原位相分析测量的对应良好，并且与先前报告的BOS的特征一致滤饼氧化。然而，原位测量的允许更详细地分析所研究的温度范围的反应。 Wüstite是BOS滤饼的第一组分，以与空气反应，在约373k至773k的温度下反应形成磁铁矿 - 锌铁氧体尖晶石固溶体。金属铁的反应在较高温度下比wüstite开始，从〜633 k开始，在〜873 k下完成。在873k的温度下，助气体（主要是Caco_（3））的分解仍然在高于1073的温度下。 K，赤铁矿与氧化锌反应形成锌铁氧体。威斯特在最低温度下反应的知识是了解博斯滤饼的自烧成的理解，并且可以对自烧结过程的启动进行洞察。 。这种改进的理解将有助于分析和侧重于过程优化的方法，以增加可以回收回BOS的滤饼量。

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