低煤级煤中部分元素有机亲合性的定量研究

Quantitative Study of Organic Affinity of Elements in Low Rank Coals

运用逐级化学提取方法研究了低煤级煤中 Co,Ni,Cr,V,Sb等 1 1种元素有机亲合性 .结果表明 :1 )低煤级煤中存在有机态的微量元素 ,不同元素的有机亲合性差异较大 ,不同样品中同一元素的有机亲合性也存在一定差异 ,这可能与煤中该元素的丰度和性质、成煤地质条件有关 ;2 )低煤级煤中与煤大分子结合的 w(Co) ,w(Ni) ,w(Cr) ,w(V) ,w(Sb)的平均值为 1 3 % ,80 % ,6 9% ,3 6 % ,3 3 % ;与胡敏酸结合的平均值为 3 0 % ,6 % ,1 7% ,5 % ,1 3 % ;与富里酸结合的平均值为 6 9% ,3 % ,3 % ,2 1 % ,1 8% ;3 )低煤级煤中 Zn,Cd,Cu,Pb等亲硫元素也表现出一定的有机亲合性 ,其中 ,与煤大分子结合的 w(Zn) ,w(Cd) ,w(Cu) ,w(Pb)平均值为 2 2 % ,2 1 % ,40 % ,2 3 % ,与胡敏酸结合的平均值为 9% ,9% ,7% ,1 4% ,与富里酸结合的平均值为 2 0 % ,1 3 % ,2 2 % ,1 3 %

The organic affinity of 11 elements such as Co, Ni, Cr, V, Sb, et al. in low rank coal was researched using the method of sequential chemical extract. The result shows that 1) organic-associated minor and trace elements does exist in low rank coal. Organic affinity of individual element is different, and organic affinity of the same element in different samples is also somewhat different, which are dependent on the abundance and property of the element and coal-forming geological process; 2) The average contents of Co, Ni, Cr, V, and Sb, which are combined with coal macromolecular are 13%, 80%, 69%, 36%, 33%; That with humic acid are 30%, 6%, 17%, 5%, 13% ; That with fulvic acid are 69%, 3%, 3%, 21%, 18% ; 3) Chalcophile elements such as Zn, Cd, Cu and Pb also show somewhat organic affinity, the average contents of Zn, Cd, Cu and Pb which are combined with coal macromolecular are 22%, 21%, 40% and 23%; That with humic acid are 9%, 9%, 7%, 14% ; That with fulvic acid are 20%, 13%, 22%, 13% of Zn, Cd.