从酸浸石煤的萃取液中沉淀多聚钒酸铵  

Research of Precipitation Poly ammonium Vandate from Extraction Solution of Acid leaching Bone Coal

作　　者：张云[1] 范必威[1] 彭达平[1] 

机构地区：[1]成都理工学院应用化学系,610059

出　　处：《稀有金属》2001年第2期157-160,共4页Chinese Journal of Rare Metals

摘　　要：进行了酸浸石煤萃取液铵盐直接沉钒的工艺研究 ,对沉钒的主要影响因素 ,如加铵系数、溶液pH值、沉钒时间、温度等均进行了详细实验 ,得出了合理的沉钒工艺参数 :在pH =4.0 ,加铵系数 3 5 ;沉钒时间 6 0～ 90min ,以及温度不低于 80℃的条件下 ,从含钒 16～ 2 0g/L的萃取液中沉钒 ,沉钒率可达 98%以上 ,产品质量达国家标准。研究还表明 ,由于SO4 2 -,CO3 2 -,Na+,Cl-等的影响 ,从酸浸石煤萃取液沉钒与从水浸液沉钒相比 ,一些工艺参数如pH、KNH3The process of preciptiation poly ammonium Vanadate from the extraction solution of acid leading bone coal was researched. The best technology parameters were obtained through tests as follows:(1)the pH is about 4 0;(2) the coefficient of ammonification K =3.5; (3) the reaction time is about 60～90 min;(4) the precipitation temperature is not less than 80℃. Under the conditions the preciptation rate is more than 98% to the extraction solution containing 16～20 g/L V 2O 5, and the purity of V 2O 5 is up to trade standard.At the same time, the research indicate,because of the effect of SO 4 2- ,CO 3 2- ,Na +,Cl - etc, the precipitation process from the extraction solution of acid leaching bone coal is different in some facts such as pH, K NH 3 ,in compare with that from water leaching solution.

关 键 词：沉淀 五氧化二钒 萃取 石煤 酸浸 多聚钒酸铵 

分 类 号：TF841.3[冶金工程—有色金属冶金]