碱法浸出石煤中的钒和硅

摘要

在石煤提钒工艺中，为了充分利用石煤中的有价元素硅，采用碱浸提钒工艺提取石煤中的钒和硅．经过预焙烧后，可以有效地破坏石煤结构，提高钒硅浸出率．在焙烧温度850℃、焙烧时间2 h、浸出温度95℃、浸出时间4 h、固液比（g∶m L ）1∶1．4、矿碱质量比1．2∶1的条件下，钒的浸出率为86．6％，硅的浸出率为61．4％．%In order to make full use of valuable element silicon in stone coal ,alkali leaching vanadium process was used in extracting vanadium and silicon from stone coal .Through pre‐roasting ,the stone coal structure can be destroyed and the leaching rate of vanadium and silicon can be improved .When the roast temperature was 850 ℃ ,the roast time was 2 h ,the leaching temperature was 95 ℃ ,the leaching time was 4 h ,the solidliquid ratio was 1∶1 .4 ,and the ratio of alkali and ore was 1 .2∶1 ,the leaching rates of vanadium and silicon were 86 .6% and 61 .4% respectively .