摘要
本文利用 X 射线衍射分析研究煤的有机结构。对河北省邯邢煤田各煤种(肥煤、焦煤、瘦煤、贫煤、无烟煤)的衍射分析表明:随着煤变质程度的增高,组成煤晶核的碳原子网之间的距离(d)相应减小.而反映煤晶核大小的 L_a 相应增大.L_c 亦相应增大,到无烟煤时 L_c 减小,但 L_aL_e利用这一规律性变化所反映的煤有机结构的特征值(L_、L_c、d)来鉴定煤的变质程度,判断煤的变质作用类型,不仅是有意义的.而且是可行的。
This paper studies the organic structure of coal by X-ray diffraction analysis.The result of analysing the distinct grade coal(rich coal,coking coal,poor coal,lean coal,anthracite coal) states that with the coal's metamorphic grade rising gradually, the distance(d_((002)))between carbon atom nets which have formed coal crystallite relatively decrease,the La and Lc which shows the size of coal crystallites relatively increase.When the coal become anthracite one the Lc decreases.La,Lc 1,which is cer tain.We can use the characteristic value of the organic structure of coal which is reflected by the regular variance to distinguish the metamorphic grade of coal,determine the metamorphic type of coal.It is not only significant,but also feasible.
关键词
煤田
煤
X射线
衍射
变质作用
X-ray diffraction
coal
coal crystallite
metamor phic grade
metamorphic type
