第18卷第1期 2018年2月
过程与工艺 a
过程工程学报
The Chinese Joumal of Process Engineering
Vol.18 No.1 Feb.2018
D0I: 10.12034/j.issn.1009-606X.217138
钙化提钒溶液沉钒的影响因素及沉钒动力学
张菊花，严哲皙锋2，张力3
(1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室，省部共建耐火材料与冶金国家重点实验室，湖北武汉430081：
2.武汉科技大学材料与冶金学院，湖北武汉430081：3.东北大学冶金学院，辽宁沈阳11004)
要：用(NH4)2SO4对钒渣钙化焙烧、稀酸浸取、化学沉淀净化后的酸性含钒溶液进行沉淀富集，考察了钒浓度、初始pH值、摘
加铵系数(NHs/V摩尔比)、沉钒温度和时间对沉钒率及V2Os含量的影响，研究了沉钒动力学，对沉钒产物进行了表征.结果表明，在初始pH为2.00±0.05、加铵系数1.5、温度大于95C、沉钒时间120min、钒液中V浓度大于20g/L的条件下，沉钒率超过96%，产品中V2Os含量大于98%，杂质含量符合98级氧化钒的国家标准，75~99℃下的沉钒过程可由Avrami动力学方程描述，表观活化能E=93.23kJ/mol，指前因子A=9.14×10min-l，铵盐沉钒产物为(NH4)2VsO16-1.5H2O，高温缎烧所得V2Os晶
体为柱状，平均粒径1.25μm，主要杂质Mn以MnV2O形式存在. 关键词：钒渣：钙化提钒；铵盐沉钒；沉钒动力学；多钒酸胺中图分类号：TF111.31
文献标识码：A
文章编号：1009-606X(2018)01-0111-07
InfluenceFactors andKinetics ofVanadiumPrecipitationfor theVanadiumSolutionfrom
CalcifiedVanadiumExtraction Juhua ZHANG',Zhefeng YAN,LiZHANG3
(I. Key Laboratory for Ferrous Metallargy and Resource Utilization, Ministry of Education,
State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China;
2. School of Materials and Metallurgy,Wuhan University of Science and Technology, Wuhan, Hubei 430081, China,
3. School of Metallurgy, Northeastern University, Shenyang, Liaoning I10004, China)
Abstract: Vanadium component was precipitated and concentrated by ammonium salt from the acidic vanadium solution obtained by the process comprising of calcium roasting, dilute acid leaching and chemical precipitation purification. The effects of concentration of nerenoaen reaerrogedoard ro a pue eradanuoeoune ppe unoso deranpea pentoxide were studied and the kinetics of vanadium precipitation was analyzed. The precipitates were characterized. The results showed that under the conditions of initial pH of 2.00±0.05, molar ratio of NHs to V being 1.5, temperature higher than 95 'C, reaction time of e%aeeeeee product is over 98%, and the contents of impurities meet the standards of Grade 98 vanadiumpentoxide, Avrami kinetic equation well describes the precipitation process occurring at 75~99 C with apparent activation energy E,93.23 kJ/mol and pre-exponential factor A9.14×10l min-'. The vanadium precipitate is (NH4)2V6O16-1.5H:O. The crystal of vanadium pentoxide exists in columnar with mean size of 1.25 μm,and the main impurity of Mn appears as MnV:O6
Key words: vanadium slag; calcified vanadium extraction; vanadium precipitation with ammonium salt; kinetics of vanadium
precipitation; ammonium polyvanadate
1前言
钒的物理性能优良，广泛应用于冶金、化工、航天航空领域工业中钒的使用形态主要为V2Os和以
V2Os为原料生产的钒铁、氮化钒、V2O;等，钒在自然界中分布分散，目前，世界范围内提取V2Os的原料为钒渣、石煤、钢渣、石油焦和废催化剂等，我国V2Os的生产原料主要为钒钛磁铁矿冶炼的副产品钒渣(2)
收稿日期：2017-0222，修图日期：2017-0502
基金项目：钢铁冶金及资源利用省部共建教育部重点实验室开效基金资助项目(编号：FMRU201501)；省部共建耐火材料与冶金国家重点实验室青年基金
资助项目(编号：2016QN05)
作者简介：张菊花(1985-)），女，山西省析州市人，博士，讲师，有色金属冶金专业，Tel:13100690427,E-mail:zhangjuhua@wust.edu.cn 引用格式：张菊花，严暂锋，张力，钙化提钒溶液沉钒的影响因素及沉钒动力学，过程工程学报，2018,18(1):111-117.
Zhang J H, Yan Z F, Zhang L. Influence Factors and Kinetics of Vanadium Precipitation for the Vanadium Solution from Calcified Vanadium Extraction (in Chinese). Chin. J. Process Eng-, 2018, 18(1): 111117, DOI: 10.12034/jissn.1009-606X.217138
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