某石煤钒矿的工艺矿物学研究

研究某石煤钒矿的工艺矿物学特性,查明了矿石中钒元素的赋存状态及主要矿物的嵌布特征,并就影响提钒工艺的矿物学因素进行了分析。结果表明,矿石中88.02%的钒呈类质同象分布于硅酸盐矿物中,6.00%分布于褐铁矿中,4.20%以钒钛氧化物形式独立存在,少量钒以钒酸盐形式存在。含钒硅酸盐矿物主要以隐晶质或胶状结构产出,并与微晶石英及炭质紧密胶结在一起,焙烧、高酸浸出(钒浸出率仅64%)难以破坏其结构。提钒工艺的选择应重视选矿富集钒或选矿抛弃耗酸矿物。

Process Mineralogy of Vanadium Bearing Stone Coal Ore

The process mineralogy characteristics of vanadium bearing stone coal ore were studied. The occurrence of vanadium in ore and dissemination characteristics of main minerals were found out. The effects of mineralogy factors on vanadium extraction were analyzed. The results show that 88.02% of total vanadium in ore distributes in silicate minerals as isomorphism, 6.00% of vanadium distributes in limonite, 4.20% of vanadium independently exists as vanadium-titanium oxide ore, and the rest small amount exists as vanadate. Occurring mainly as cryptocrystalline or colloidal texture and cemented closely with microlitic quartz and carbonaceous matter, vanadium-bearing silicate minerals is hard to be broken with blank roasting and concentrated acid leaching with a vanadium leaching rate of only 64%. The selection of vanadium extraction process shall be focused on vanadium concentration or discarding of acid-consuming minerals by mineral processing.