Abstract

To understand quality of coking coal possessing different particle sizes, coal samples from Gao Yang (GY) and Shui Yu (SY) mines were systematically studied. The samples had wide particle size variations with six distinct ranges. The main emphasis was placed on analyzing sulfur and coke contents as function of particle sizes. X-ray photoelectron spectroscopy (XPS) was used to analyze sulfur content as well as its chemical state. Sulfur coordination and group geometry was analyzed by Fourier transform infrared spectroscopy (FTIR). Scanning electron microscopy (SEM) was applied to characterize surface morphology.

Sieving of the coal samples increased ash and sulfur contents in all fractions. Organic sulfur was mostly present as thiophene for all particle size ranges. Macromolecular structure of coal was almost the same for all samples. Changes in total sulfur content of different coal fractions were mainly caused by the variations in inorganic sulfur concentrations because organic sulfur content remained almost constant. Understanding particle size distribution in different coals is important for selecting and optimizing appropriate desulfurization methods.

中文翻译：

---

焦煤中硫含量随粒度变化的变化

摘要

为了了解具有不同粒径的炼焦煤的质量，系统地研究了高阳（GY）和水Yu（SY）煤矿的煤样。样品具有六个不同范围的宽粒度变化。主要重点放在分析硫和焦炭含量与粒径的关系。X射线光电子能谱（XPS）用于分析硫含量及其化学状态。通过傅立叶变换红外光谱（FTIR）分析了硫的配位和基团几何形状。应用扫描电子显微镜（SEM）表征表面形态。

筛分煤样品会增加所有馏分中的灰分和硫含量。在所有粒径范围内，有机硫大多以噻吩的形式存在。对于所有样品，煤的大分子结构几乎相同。不同煤馏分中总硫含量的变化主要是由于无机硫含量的变化所致，因为有机硫含量几乎保持恒定。了解不同煤中的粒度分布对于选择和优化合适的脱硫方法非常重要。