Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad-826 004, Jharkhand, India.
Environ Sci Pollut Res Int. 2022 Apr;29(17):24849-24862. doi: 10.1007/s11356-021-17626-9. Epub 2021 Nov 26.
Characteristics of pulverized coals have significant influence on the spontaneous combustion and explosion processes. This paper presents an experimental and theoretical framework on physico-chemical characteristics of coal and their interrelations from spontaneous combustion and explosion perspectives. The chemical properties, morphology, bulk density, particle size, and specific surface area of pulverized coals from nine different coal subsidiaries of India are vividly investigated in five distinct sizes. Moreover, the effects of particle size on bulk density, specific surface area, and N adsorption capacity of pulverized coals are critically analyzed. With decrease in particle size, the bulk density of pulverized coals decreased, and the specific surface area and N adsorption capacity increased. The relationships of bulk density and specific surface area of pulverized coals with particle size are established. Moreover, the specific surface areas determined by both the particle sizing and BET methods are compared, and correlation factors between them are determined. This study generated insightful coal characteristic data, which can be useful for furthering research on spontaneous combustion and explosion involving pulverized coals.
煤粉的特性对自燃和爆炸过程有重大影响。本文从自燃和爆炸的角度提出了一个关于煤的物理化学特性及其相互关系的实验和理论框架。详细研究了来自印度九个不同煤炭子公司的五种不同粒径的煤粉的化学性质、形态、堆积密度、粒径、比表面积。此外，还分析了粒径对煤粉堆积密度、比表面积和 N 吸附容量的影响。随着粒径的减小，煤粉的堆积密度降低，比表面积和 N 吸附容量增加。建立了煤粉堆积密度和比表面积与粒径的关系。此外，比较了通过颗粒尺寸和 BET 方法确定的比表面积，并确定了它们之间的相关系数。本研究生成了有价值的煤粉特性数据，可用于推进涉及煤粉的自燃和爆炸研究。
