The element release rates under different reburn condition have been discussed . in order to determinate the combustion and burn out characteristics of the reburn fuel , the combustion experiments of the collected ash samples have been carried out in a thermal gravimetric analyzer 發(fā)現(xiàn)在反應(yīng)時(shí)間小于0 . 2秒時(shí),煤中各元素具有較高的消耗速率;在反應(yīng)時(shí)間超過0 . 2秒后,各元素的消耗速率下降。