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分裂岩和棕炭灰的热学研究

Jurij Delihowski¹, Marcin Gajek¹, Piotr Izak¹

¹Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Krakow, Poland.

Materials (Basel, Switzerland)

|July 27, 2024

概括

研究煤灰飞 (CFA) 的热行为显示,尺寸分数具有不同的特性. 空气动力学分离CFA产生适合特定高温应用的材料,增强其利用潜力.

科学领域:

材料科学材料科学材料科学
地质化学地质化学
化学工程是化学工程的重要组成部分.

背景情况:

煤炭飞灰 (CFA) 是燃烧煤炭的副产品,具有潜在的工业应用.
由于CFA的构成异质,因此对其有效利用提出了挑战.
了解CFA的热行为对于优化其使用至关重要.

研究的目的:

为了研究煤飞灰 (FA1) 和棕煤飞灰 (FA2) 以及它们的尺寸分数的热行为.
描述空气动力学分离对CFA属性的影响.
根据其热特性,确定分离的CFA分量的潜在应用.

主要方法:

飞灰样本的干空气动力学分离.
热分析技术:热重力测量 (TG),微分扫描热量测量 (DSC) 和进化气体分析 (EGA).
将样品加热至1250°C以观察热变化.

主要成果:

在FA1和FA2灰及其尺寸分数之间观察到热行为上的明显差异.
对于FA1,较小的颗粒显示化合物和再结晶的增加,形成无水化物,凝化物和无化物.
FA2灰呈现出较低的化和聚合温度,颗粒尺寸较小,较粗的碎片显示出较小的矿物学变化.

结论:

空气动力学分离产生具有不同热特性和反应性的CFA分离物.
这些量身定制的分数可以用于需要控制热性能的特定应用.
热分析对于描述CFA和释放其充分利用潜力至关重要.

关键词:

煤炭飞灰是什么意思煤炭飞灰颗粒大小分数颗粒大小分数通过高温处理处理.热性行为热性行为热反应性热反应性

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