Abstract
Stone coal is a kind of carbonaceous shale that contains vanadium. The sequential chemical extractions were adopted to analyze the vanadium phases of stone coal and its combustion fly ash. The results showed that the vanadium in stone coal mainly consisted in aluminosilicate. The vanadium in fly ash mainly existed in organic matter, aluminosilicate and Fe–Mn oxides, and the other vanadium existed in exchangeable fraction. Through the burning process, the vanadium was released and enriched in fly ash. Because of particular vanadium migration behaviors, the distribution of vanadium in phases became more scattered, and the leaching of vanadium in fly ash was easier than that in stone coal.
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