基于图像分析技术的粉煤灰颗粒形貌表征

Morphology Characterization of Fly Ash Particles Based on Image Analysis Technology

基于图像分析技术,分析了粉煤灰颗粒群的形貌特征,提出了可量化表征颗粒群形貌的参数,并以此作为区分粉煤灰颗粒群形貌品质的判据之一.结果表明:粉煤灰颗粒群的形貌特征可用不同圆度等级下的颗粒面积占比来表征,其中S_(R>0.8/SR>0.5)(圆度R>0.8与R>0.5颗粒的表面积比)最能体现粉煤灰颗粒群形貌的特征差异;当图像放大200倍时,高形貌品质粉煤灰的S_(R>0.8/SR>0.5)可达到10%以上,与非球状颗粒粉体形貌存在明显的差异.

Based on image analysis technology,the morphological characteristics of fly ash particle groups were analyzed,and the parameters that can quantify the morphology of particle groups were proposed to be one of the criteria to distinguish the morphology quality of fly ash.The results show that the morphology characteristics of fly ash particle groups can be accurately characterized by the proportion of particle area ratio under different roundness grades,and the S_(R>0.8/SR>0.5)(the ratio of particle surface area of roundness above 0.8 to that above 0.5)can best describe the morphological characteristics of particle groups.When it is at 200 times magnification and above,the S_(R>0.8/SR>0.5) of qualified fly ash can exceed 10%,the fact is significantly different from that non‑spherical particle powder.