煤炭不同研磨时间对检测结果的影响研究

Studies Effect of Grinding Time on Coal-analysis Result

为研究一般分析试验煤样0.2 mm筛上物比率对检测结果的影响,选取了5个具有代表性的煤样进行了试验。实验结果表明:不同煤种完全通过0.2 mm筛的研磨时间是不一样,用于检测用的一般分析试验煤样,样品粒度全部小于0.2 mm时检测结果有更好的重复性和代表性,开展煤质检测的机构或部门应针对煤种及磨粉设备进行粒度分析,确定最佳磨粉时间,保证样品检测的准确性。

In order to studies screen overflow of ratio general analysis test sample of coal on the coalanalysis result, five different coals were used to test. Results of the trial indicated that all particles of different coal pass 0.2 mm sieves takes differing amounts of time to grind, it could satisfy the requirement of coal quality analysis when the particle size of sample was less than 0.2 mm, the agency of coal quality testing need to analysis the grain size of general analysis test sample of coal, ensure sample testing accuracy.