煤中微量元素间依存关系的聚类分析

通过对四种不同类型煤中灰分、硫分和１６种微量在不同密度级中呈的Ｒ型聚类分析，研究了煤中微量元素间的依存关系。结果表明：煤中碱土 金属Ｂｅ、Ｓｒ、Ｂａ彼此间的依存关系一般较弱，与所研究的其它元素的相关性也较北：稀土元素Ｌａ、Ｃｅ、Ｙ、Ｓｅ经常相伴而生；Ｖ总与灰分显著相关；Ａｓ、Ｃｏ、Ｎｉ等元素民黄铁矿硫的存在密切相关。

CLUSTER ANALYSIS OF DEPENDENCE RELATIONSHIP OF TRACE ELEMENTS IN COAL

Four coals have been sampled and separaed into different density fractions by float-sink The content of some trace elements in each density fraction has been analyzed by ICAP Through cluster analysis for ash, sulfur and 16 trace elements, the dependence relationship of trace elements in coal is studied The results show that for alkaline-earth metals such as Be, Sr and Ba their dependence relationship are not significant, and the correlation is weaker with other elements studied Rare-earth elements such as Y, La, Ce, Sc are often symbiosis V a lithophile element is always significantly correlated with ash, and its binding ability is stronger with oxygen and weaker with sulfur As, Co and Ni, the thiophile elements, have significant correlation with pyritic sulfur The dependence relationship of trace elements in coal is related to the physicochemical property of elements, geological environment and metamorphism of coal formation