Effect of vanadium occurrence state on the choice of extracting vanadium technology from stone coal
Effect of vanadium occurrence state on the choice of extracting vanadium technology from stone coal
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DOI：
10.1016/s1001-0521(08)60097-2
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发表时间：
2008-04-01
期刊：
影响因子：
8.8
通讯作者：
Xiao Liansheng
中科院分区：
文献类型：
--
作者：
Wang Mingyu;Xiang Xiaoyan;Xiao Liansheng
石煤无盐焙烧稀酸浸出提钒工艺具有污染小、投资少、浸出效率高等优点，是目前推广应用的最佳工艺。研究了石煤中钒的赋存状态、焙烧温度和添加剂对钒浸出率的影响。结果表明，钒的赋存状态对提钒工艺有明显的影响。如果石煤中的钒组分以无定形形式存在，可采用无板岩焙烧和稀酸溶液浸出工艺处理这类石煤，当石煤中存在含钒晶相时，必须加入焙烧添加剂破坏这种晶相，才能获得较高的钒浸出率。
The extraction technology of vanadium from stone coal by means of no-salt-roasting and dilute acid solution leaching treatment has the advantages of low pollution, low investment, as well as high vanadium leaching efficiency, which makes it the best technology for extending application. In the present study, the effects of vanadium occurrence state in stone coal, roasting temperature and additive agent on the leaching efficiency of vanadium were studied. The results indicate that the effect of vanadium occurrence state on the extracting vanadium technology is obvious. If the vanadium component in stone coal existed in amorphous phase form, this type of stone coal can be treated by no-slat-roasting and dilute acid solution leaching technology; while the vanadium-bearing crystalline phase existed in stone coal, the roasting additive must be added to destroy this crystalline form so as to acquire high vanadium leaching rate.