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High Temperature Dielectric Properties of Iron- and Zinc-Bearing Products during Carbothermic Reduction by Microwave Heating
Metals ( IF 2.9 ) Pub Date : 2020-05-25 , DOI: 10.3390/met10050693
Beatriz García-Baños , Jose M. Catalá-Civera , Juan R. Sánchez , Laura Navarrete , Angel M. López-Buendía , Lukas Schmidt

In this work, the carbothermic reduction of iron- and zinc-bearing products is studied through in situ microwave heating, dielectric properties monitoring, and mass spectrometry up to high temperatures (1000 °C). The results are correlated to the information provided by conventional analysis techniques such as differential scanning calorimetry (DSC) and thermogravimetry (TG). This combination allows a detailed study of seven different process stages with an accurate determination of the reaction temperatures, providing new evidence about the particular conditions of this microwave-driven reduction process. The presented results suggest that molecular vibrations imposed by the microwave field are presumably the reason for reactions taking place at lower temperatures than those observed in the conventional process. This work also explores the influence of other parameters, such as the apparent density or the amount of carbonaceous material, on the resulting dielectric properties, providing useful information for the development of a potential microwave industrial application in the metallurgy field.

中文翻译:

微波加热碳还原过程中铁和锌产品的高温介电性能

在这项工作中,通过原位微波加热,介电特性监控以及在高达1000°C的高温下进行质谱分析,研究了含铁和锌产品的碳热还原。结果与常规分析技术(例如差示扫描量热法(DSC)和热重法(TG))提供的信息相关。这种结合可以对七个不同的工艺阶段进行详细研究,并精确确定反应温度,从而提供有关此微波驱动还原过程特殊条件的新证据。提出的结果表明,由微波场施加的分子振动大概是在比常规方法观察到的温度更低的温度下发生反应的原因。
更新日期:2020-05-25
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