ABSTRACT The aggregation and growth behaviours of Fe–Mn particles in the direct alloying process were investigated using the high-temperature experiment. The manganese-rich slag was used as a source of manganese to make into the briquette for the alloying process, and the quaternary slag was prepared using an analytical reagent. To monitor the aggregation and growth process of metal particles and its chemical reactions, some test methods, such as XRD, TDA SEM and EDS, were applied. The results showed that after the briquette is added into the melted slag, because the heat is transferred from the outer layer of the briquette to its interior, the growth process of metal particles can be divided into three stages: nucleation period, aggregation period and growth period. In the first two stages, the Fe particles are first reduced as the nucleation for the alloying process, while the Mn particles are nucleated by Fe particles and formed Fe–Mn particles. Finally, the Fe–Mn particles gradually grow up. In addition, the statistical model was developed for describing the growth process of Fe–Mn particle, and it shows a good relationship with the measured value.

中文翻译：

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熔渣中Fe-Mn颗粒聚集和生长过程的研究

摘要 利用高温实验研究了直接合金化过程中 Fe-Mn 颗粒的聚集和生长行为。富锰渣用作锰的来源，以制成合金化过程的煤球，并使用分析试剂制备四元渣。为了监测金属颗粒的聚集和生长过程及其化学反应，应用了一些测试方法，如XRD、TDA SEM和EDS。结果表明，型煤加入熔渣后，由于热量从型煤外层传递到其内部，金属颗粒的生长过程可分为成核期、聚集期和生长三个阶段。时期。在前两个阶段，Fe 粒子首先被还原为合金化过程的成核，而 Mn 粒子被 Fe 粒子成核并形成 Fe-Mn 粒子。最后，Fe-Mn 颗粒逐渐长大。此外，建立了描述Fe-Mn颗粒生长过程的统计模型，它与测量值显示出良好的关系。