Understanding the evaporation and decomposition process of bischofite precursor droplets in a pyrolysis furnace is the prerequisite for designing an efficient spray bischofite treatment facility. However, current research lacks guidance on this behavior. Here, it provided a new theoretical basis for understanding evaporation characteristics and decomposition behavior by introducing the Abramzon-Sirignano and kinetics models. In addition, the effects of ambient temperature and relative humidity on the evaporation characteristics of different precursors were analyzed. Meanwhile, the decomposition products and yield changes were studied in detail under different temperatures and times. The results show that the mass transfer coefficient and latent heat of vaporization have the most significant influence on droplet evaporation. To high recovery rate, the reaction temperature must be above 1125 °C. The current work can guide obtaining high magnesium oxide yield from waste bischofite in pyrolysis.

中文翻译：

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喷雾热解系统双钨矿前驱体液滴蒸发和热分解的数值研究


了解热解炉中 bischofite 前驱体液滴的蒸发和分解过程是设计高效喷涂 bischofite 处理设施的先决条件。然而，目前的研究缺乏对这种行为的指导。在这里，它通过引入 Abramzon-Sirignano 和动力学模型为理解蒸发特性和分解行为提供了新的理论基础。此外，还分析了环境温度和相对湿度对不同前驱体蒸发特性的影响。同时，详细研究了不同温度和时间下的分解产物和产量变化。结果表明，传质系数和汽化潜热对液滴蒸发的影响最显著。要实现高回收率，反应温度必须高于 1125 °C。 目前的工作可以指导在热解中从废 bischofite 中获得高氧化镁收率。