Li Le, Liu Jing, Li Xiangyang, Peng Zeyu, Han Chun, Lian Wenhao, Xue Bin, Gao Chenmin, Zhang Qian, Huang Wei
State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China.
Department of Chemistry and Chemical Engineering, Shanxi Polytechnic College, Taiyuan 030032, China.
Molecules. 2024 Aug 21;29(16):3956. doi: 10.3390/molecules29163956.
Investigating the physicochemical properties and embedding forms of residual carbon (RC) and slag particles (SPs) in coal gasification fine slag (FS) is the basis for achieving its separation and utilization. An in-depth understanding of their compositional characteristics allows for targeted treatment and utilization programs for different components. In this work, the physicochemical properties and embedding forms of RC and SPs in FS were systematically investigated. An innovative calculation method is proposed to determine the mass fraction of dispersed carbon particles, dispersed mineral-rich particles, and carbon-ash combined particles by using a high-temperature heating stage coupled with an optical microscope. The unburned RC with a rough, loose surface and a well-developed pore structure acted as a framework in which the smaller spherical SPs with a smooth surface were embedded. In addition, the sieving pretreatment process facilitated the enrichment of the RC. Moreover, the RC content showed significant dependencies according to the FS particle size. For FS with a particle size of 0.075-0.150 mm, the mass proportions of dispersed carbon, ash particles, and the carbon-ash combination were 15.19%, 38.72%, and 46.09%, respectively. These findings provide basic data and reliable technical support for the subsequent carbon and ash separation process and the comprehensive utilization of coal gasification slag.
研究煤气化细渣（FS）中残余碳（RC）和矿渣颗粒（SPs）的物理化学性质及包裹形式是实现其分离与利用的基础。深入了解它们的组成特性有助于针对不同成分制定有针对性的处理和利用方案。在这项工作中，系统研究了FS中RC和SPs的物理化学性质及包裹形式。提出了一种创新的计算方法，通过高温加热阶段结合光学显微镜来确定分散碳颗粒、分散富矿颗粒和碳 - 灰结合颗粒的质量分数。表面粗糙、松散且孔隙结构发达的未燃尽RC充当了框架，表面光滑的较小球形SPs嵌入其中。此外，筛分预处理过程促进了RC的富集。而且，RC含量根据FS粒径表现出显著的相关性。对于粒径为0.075 - 0.150 mm的FS，分散碳、灰颗粒和碳 - 灰组合的质量比例分别为15.19%、38.72%和46.09%。这些发现为后续的碳灰分离过程及煤气化炉渣的综合利用提供了基础数据和可靠的技术支持。
