灰分和硫含量对煤的视相对密度测定结果的影响

Discussion on the influence of ash yield and sulfur content on the determination of apparent relative density of coal

采用十二烷基磺酸钠法和液体石蜡法对不同代表性煤样的视相对密度进行分析试验,并对试验结果进行统计分析。试验结果分析表明:灰分和全硫含量影响煤的视相对密度测定;对于高灰、高硫煤样,3mm～6mm煤样的代表性较10mm～13mm煤样的代表性好,应选用行业标准进行煤的视相对密度的测定。

The apparent relative density of different coal sample representatives were determined by sodium dodecyl sulfate method and liquid paraffin method, and the experimental data were statistically analyzed. The data analysis showed： the determination of apparent relative density of coal was influenced by ash yield and sulfur content; for the high-ash and high-sulfur samples, the representativeness of 3 mm-6 mm sample was better than that of 10 mm-13 mm sample. The determination of apparent relative density of coal should be in accordance with relevant coal industrial standards.