陕西某钒矿石钙化焙烧—酸浸工艺研究  

Calcified Roast-Acid Leaching of Vanadium From Vanadium Ore in Shaanxi

作　　者：贾秀敏[1] 李培佑[1] 黄永[1] 陈天宝[1] 刘忠臣[1] 刘会武[1] 闻振乾[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《湿法冶金》2015年第3期182-185,196,共5页Hydrometallurgy of China

摘　　要：研究了采用钙化焙烧—酸浸工艺从陕西某钒矿石中浸出钒,考察了焙烧温度、添加剂种类与用量、焙烧时间、空气通量、矿石粒度、浸出条件等对钒浸出的影响。试验结果表明,在矿石粒度-100目、焙烧温度920℃、加入4%CaCO3+2%CaCl2作添加剂、空气通量50m3/(m2·h)条件下焙烧4h,然后在硫酸总用量8%、液固体积质量比1.5∶1、常温条件下2段逆流浸出3h,钒浸出率达70%以上。Recovery of vanadium by calcified roast‐acid leaching w as studied .T he effects of particle size of ore ,roasting additive ,roasting temperature ,roasting time ,air flux and leaching conditions on leaching rate of vanadium w ere examined .T he results show that vanadium leaching rate can reach 70%under the conditions of particle size of -100 mesh ,roasting temperature of 920 ℃ ,using 4% CaCO3 and 2% CaCl2 as roasting additive ,air flux of 50 m3/（m2 ＆#183; h） ,roasting time of 4 h ,sulfuric acid dosage of 8% ,liquid‐to‐solid ratio of 1 .5∶1 ,two‐stage countcurrent leaching at room temperature ,leaching time of 3 h .

关 键 词：钒矿石 钙化焙烧 硫酸 钒 浸出 

分 类 号：TF841.3[冶金工程—有色金属冶金] TF802.67