煤中15种微量元素在燃烧产物中的分配

建立了燃煤中１５种向量元素在悄灰和底灰中含量分布的经验公式，该公式可以估算煤中微量元素在燃烧产物中的分配及传输通量。煤中非挥发性元素大部分存在于底灰和飞灰中，挥发性元素进入大气的量较高。

DISTRIBUTION OF 15 TRACE ELEMENTS IN THE COMBUSTION PRODUCTS OF COAL

Empirical formulas were developed for trace elements distribution in fly ash and bottom ash of burning coal,by which the distribution and transfer of trace elements in coal-burning products can be calculated.Most of the non-volatile elements in coal stays in fly ash and bottom ash aftering burning,a large quantity of volatile elements, however,releases into air. In the fly ash produced by a layer-burning boiler,the trace element content increases with a decrease in particle diameter,and about 90%of the elements are distributed in the particles with a diameter of <0.125mm. The trace elements in coal-burning products have strong stripping property,hence it have an obvious environmental effect.