湖北某石煤型钒矿石工艺矿物学研究

为了给湖北某石煤型钒矿石中钒的回收工艺研究提供指导，采用化学分析、显微镜观察、单矿物化学成分能谱分析、MLA矿物自动定量检测技术等手段对该矿石进行了工艺矿物学研究，得出的主要结论为：① 矿石V₂O₅含量为0.96%，含钒矿物有钒云母（纤维钒云母、含碳钒云母和片状钒云母）、含钒褐铁矿、钒钙榴石及水钒铁矿、羟钒铜矿、钒钡铜矿等；② 虽然矿石中含钒矿物种类较多，但回收钒的主要对象为钒云母、含钒褐铁矿和钙钒榴石，这三者的V₂O₅分配率合计达97.08%；③ 含钒褐铁矿和钙钒榴石具有一定磁性，而钒云母磁性极弱。根据以上结论，建议先通过强磁选预富集含钒褐铁矿和钙钒榴石、通过浮选预富集含钒云母，然后采用直接酸浸工艺回收强磁选精矿中的钒、采用加助浸剂的酸浸工艺或焙烧-酸浸工艺回收浮选精矿中的钒。

Study on Mineralogy of a Stone-coal Vanadium Ore from Hubei

Process mineralogy was conducted on a stone-coal vanadium ore from Hubei by chemical analysis,microscope observation,energy spectrum analysis of mono-mineral chemical components,MLA automated quantitative surveying technique to provide guidelines for vanadium extraction from the ore.The mainly results are as follows: ①the V₂O₅ content of the ore was 0.96%,and vanadium bearing minerals includes vanadium mica (fiber vanadium mica,carbon vanadium mica and flake roscoelite),vanadium-containing limonite,calcium vanadium garnet and fervanite,hydroxyl copper,vanadium barium copper,etc.; ②Although vanadium exists in many minerals,the objective minerals are vanadium mica,turanite,and vesignieite only with V₂O₅ distribution rate of these three 97.08%; ③Both the vanadium-bearing limonite and calcium-vanadium garnet have a certain magnetism,while vanadium mica is lower.According to the conclusion above,it is recommended that the high intensity magnetic separation is adopted to enrich vanadium bearing limonite and calcium vanadium garnet,vanadium mica is pre-enriched by flotation,and then vanadium is recovered from magnetic separation concentrate by the direct acid leaching method,and from flotation concentrate by acid leaching process or roasting-acid leaching process with the addition of leaching agent.