对13种不同变质程度的炼焦煤进行三维扫描荧光光谱测定,分析了荧光特性参数(IF,max,IF,450和IF,470)与黏结性指标(黏结指数G值、吉氏流动度lgα和奥亚膨胀度b值)之间的关系.结果表明,当G〈90时,IF,max,IF,450和IF,470随G值的增加变化不大;当G〉90时,IF,max,IF,450和IF,470随G值变化线性增加.流动度与荧光特性参数也有同样规律,转折点在lgα=3.0处.表明荧光特性参数能够很好地区分强黏结性炼焦煤.荧光参数随b值增加先增大后减小,在b值为195%时有最大值.
The fluorescence parameters(IF,max,IF,450,IF,470)for 13 kinds of coking coals with different coal ranks were determined using the three-dimensional scanning fluorescence spectroscopy.The relationships between fluorescence parameters and caking properties(caking index G,Gieseler fluidity lgαand Audibert-Arnu dilatometer b)were analyzed.The results show that IF,max,IF,450 and IF,470 have little difference with the increase of G(G90),and increase linearly with the increase of G(G90).The relationship of these fluorescence parameters with the fluidity is similar with G,and the turning point is lgα=3.0.Therefore,the fluorescence parameters are new index to evaluate the caking properties for the strongly caking coals.The fluorescence parameters first increase then decrease with the increase of b and the maximum is 195%.