采用XPS分析了渭北高硫煤中硫的赋存形态,考察了硫分在不同粒级、不同密度级煤中的分布特征及在筛分浮沉实验过程中的变化规律,基于此进行了煤中硫可选性评价,结果表明,较高变质程度的渭北高硫煤中有机硫主要以噻吩类杂环化合物以及亚砜型硫等形式存在于煤的有机质结构中.借助高效的物理洗选将煤样破碎至6 mm～0.5 mm,能较好地改善煤中硫的可选性.将煤破碎至3 mm～0.5 mm,理论精煤产率为88.8％,灰分为12.0％,精煤硫分为2.3％,须借助化学方法进一步脱除其中细分散的无机硫以及大量的有机硫.%XPS was applied to investigate the mode of occurrence of sulfur in high-sulfur coal from Weibei coal field. The distribution characteristics of sulfur in different particle sizes and different densities, and the changes of sulfur by sieving, float and sink analysis were presented. According to these analysis, the washability evaluation on sulfur in coal was made. The results indicate that higher metamorphic and high-sulfur coal from Weibei coal filed is enriched in hetero-cycle thiophenic structure and sulfoxide et al. The washability of sulfur in coal can be improved by crushing the particle size to 6 mm-0. 5 mm. The theoretic yield of fine coal of 3 mm-0. 5 mm coal is 88. 8%, ash content is 12. 0%, and the theoretic sulfur content is 2. 3%. Other chemical methods must be further employed to remove organic sulfur and fine dispersed inorganic sulfur.
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