钠化法提钒工艺条件的研究

研究了陕西某石煤矿提钒工艺。在原矿中加入少量添加剂氯化钠进行氧化焙烧, 研究了最适宜的氯化钠用量、焙烧温度、焙烧时间等因素对氧化焙烧的影响。焙砂进行碱浸, 研究了浸出时间、浸出温度、浸出碳酸钠用量、浸出液固比等因素对碱浸的影响。制定了合理的提钒工艺流程。结果表明, 采用钙法低钠焙烧-碱浸工艺, 在氧化钙用量为2%, 食盐用量为8%, 焙烧温度为850 ℃, 焙烧时间为2 h, 水浴温度70 ℃, 水浴时间2 h, 碳酸钠用量是8%, 液固比3∶1的条件下, 钒的浸出率达到了67.6%, 试验结果比较理想。

Technology on Vanadium Extraction from Bone Coal by Adding Sodium Chloride

The process of vanadium extraction from Bone Coal Mine in Shanxi is investigated.The oxidizing roasting was conducted by adding a small amount of additives,sodium chloride,in the crude ore.The effect of optimum sodium chloride dosage,roasting temperature and roasting time on the oxidizing roasting is studied.The calcine is leached by alkali,and the effect of leaching time,leaching temperature,leaching sodium carbonate dosage and leaching ratio of liquid to solid on alkali leaching is investigated.The ration...