基于数理统计分析的淮南煤中微量元素的研究

采用高分辨率电感耦合等离子质谱仪测定了淮南矿区煤中10种微量元素含量。结果表明:淮南煤中Co、Ni、Th、Zn和Cd低于全国均值,没有异常富集;Mo、Sb、U略高于全国均值,Ba和Cr平均含量明显高于中国煤中均值,可能有异常富集。运用相关分析、R型聚类分析和因子分析等数理统计方法,对淮南矿区微量元素与灰分的相关性及赋存状态进行了分析。结果表明:元素Cr、Ni、U、Th和Ba与灰分线性正相关,其中Th和Ba与灰分高度正相关,其他元素与灰分无法建立线性关系;煤中Th、Ba、Ni、Cr、U和Co可能主要以无机态赋存于煤中;Zn和Cd可能以闪锌矿等硫化物微粒的形式赋存于有机质中;Mo和Sb赋存状态较为复杂,尚需进一步研究。

Study of Trace Elements in Coals from Huainan Based on Mathematical Statistic Analysis

The contents of 10 kinds of trace elements were determined by using the inductively coupled plasma mass spectrometry. The results showed that the contents of Co、Ni、Th、Zn and Cd were lower than the average of Chinese coal; Mo、Sb and U were higher slightly; Ba and Cr were higher obviously which may be anomalously enriched. Mathematical statistic analysis methods such as correlation analysis, R cluster analysis and factor analysis were used to analyze the modes of occurrence and correlation of trace elements and ash in Huainan. The results showed that Cr、Ni、U、Th and Ba had a positive linear correlation with ash, especially Th and Ba had a significant linear correlation with ash, others elements had not;Th、Ba、Ni、Cr、U and Co maybe exist mainly in inorganic matter; Zn and Cd maybe associate predominantly with organic matter in sulfide particles form; Mo and Sb had complicated modes of occurrence in coals which need further study.