Experiments were performed using a range of test conditions to elucidate the rate controlling step during the reaction of liquid iron-carbon droplets and slags containing manganese oxide. Four conditions were tested in the system: initial MnO content in the slag (5, 10, and 15 wt pct), initial carbon content of the metal (1, 2.5, 4.3 wt pct), initial droplet mass (0.5, 1.0, and 1.5 g), and reaction temperature (1823 K [1550 °C], 1873 K [1600 °C], and 1923 K [1650 °C]). Data were collected using the Constant Volume Pressure Increase (CVPI) technique which tracked the continuous pressure increase in the sealed furnace over time. Samples were quenched at the end of each experiment and chemistry was checked using LECO Carbon Analysis and ICP (Inductively Coupled Plasma) for manganese. The rate of reaction can be broken into a faster initial period related to internal CO formation, and a slower second reaction controlled by a complex mechanism involving transport of oxygen from slag to metal via CO2 and decomposition of the CO2 at the gas–metal interface.

中文翻译：

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炉渣中锰氧化物的碳热还原动力学

使用一系列测试条件进行了实验，以阐明在液态铁碳液滴和含有氧化锰的炉渣反应过程中的速率控制步骤。在系统中测试了四种条件：炉渣中的初始 MnO 含量（5、10 和 15 wt pct）、金属的初始碳含量（1、2.5、4.3 wt pct）、初始液滴质量（0.5、1.0 和1.5 g）和反应温度（1823 K [1550 °C]、1873 K [1600 °C] 和 1923 K [1650 °C]）。使用恒定体积压力增加 (CVPI) 技术收集数据，该技术跟踪密封炉中随时间的连续压力增加。在每个实验结束时对样品进行淬火，并使用 LECO 碳分析和 ICP（电感耦合等离子体）检查锰的化学成分。