多钒酸铵制取偏钒酸钾的试验研究  

Experimental Study on Preparation of Potassium Metavanadate by Ammonium Polyvanadate

作　　者：殷兆迁[1] 

机构地区：[1]攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室,四川攀枝花617000

出　　处：《钢铁钒钛》2014年第3期28-32,共5页Iron Steel Vanadium Titanium

摘　　要：研究了由多钒酸铵制取偏钒酸钾的工艺技术,考察了结晶方式、钒浓度对偏钒酸钾成分的影响。试验结果表明：自然结晶条件下,结晶孕育时间为15~20 h,滤液中残钒高于25 g/L;加入结晶剂条件下,可以大大缩短偏钒酸钾的结晶时间,结晶时间为5~10 min,滤液中残钒含量低于2.5 g/L,结晶率超过了97%。采用加入结晶剂的方法进行了工业试验,制取了1.5 t偏钒酸钾产品,其成分TV≥36%,K≥28%,Na〈0.05%,Fe〈0.02%,达到预期目标。Potassium metavanadate was prepared by ammonium polyvanadate（ APV）. The effects of crystallization method and vanadium concentration on the compositions of potassium metavanadate were investigated. The results show that the incubation time is 15 ~ 20 h,the filtrate residue vanadium than25 g / L under natural crystallization conditions,and the crystallization time is 5 ~ 10 min and the content of residual vanadium in filtrate is less than 2. 5 g /L,and the crystallization ratio is more than 97% with crystallization promoter agent. Potassium metavanadate of 1. 5 tons,with the compositions of TV≥36%,K ≥28%,Na ＆lt; 0. 05% and Fe ＆lt; 0. 02%,were synthesized with crystallization promoter agent by industrial test which achieves the expected goals.

关 键 词：偏钒酸钾 多钒酸铵 结晶剂 结晶时间 

分 类 号：TQ131.13[化学工程—无机化工]