本文已被：浏览 2355次 下载 2375次
投稿时间：2018-01-15 修订日期：2018-01-17 录用日期：2018-01-22 网络发布日期：2018-06-15
投稿时间：2018-01-15 修订日期：2018-01-17 录用日期：2018-01-22 网络发布日期：2018-06-15
中文摘要: 以尿素沉钒制备高纯五氧化二钒，考察了沉钒时间、沉钒温度、加铵系数对沉钒过程的影响。结果表明，延长沉钒时间、提高沉钒温度、增大加铵系数，均能有效提高沉钒率和产品纯度。在沉钒时间6 h、沉钒温度98 ℃、加铵系数6.67时，沉钒率达到93.57%，纯度达到99.57%以上（氨水沉钒产品纯度仅为95.42%），且满足冶金行业标准。与氨水沉钒产物对比，尿素沉钒产物结晶度更高，形貌更完整均一。
Abstract:High purity vanadium pentoxide was prepared with urea as precipitant. Effects of vanadium precipitation time, vanadium precipitation temperature and urea addition on vanadium precipitation were investigated. The results indicate that prolonging vanadium precipitation time, raising vanadium precipitation temperature and increasing ammonium addition coefficient can effectively improve vanadium precipitation rate and product purity. Vanadium precipitation rate is 93.57% with purity of calcined product of 99.57% (while purity of ammonia precipitated vanadium product is only 95.42%) under the conditions including precipitation time of 6h, precipitation temperature of 98 ℃, and urea addition coefficient of 6.67. The product meets the metallurgical industry standard. Compared with product of precipitation with ammonia, the product precipitated by urea has higher crystallinity and more homogeneous morphology.
文章编号： 中图分类号： 文献标志码：
基金项目:国家自然科学基金资助项目（51774216）；湖北省技术创新专项（2017ACA185）
引用文本：
张刘洪,张一敏,刘涛,黄晶,张国斌,杨亚东.尿素沉钒制备高纯五氧化二钒[J].有色金属（冶炼部分）,2018(7):53-56.
Zhang Liuhong,Zhang Yimin,Liu Tao,Huang Jing,Zhang Guobin,Yang Yadong.Preparation of High Purity Vanadium Pentoxide by Urea Precipitation[J].Nonferrous Metals (Extractive Metallurgy),2018(7):53-56.
张刘洪,张一敏,刘涛,黄晶,张国斌,杨亚东.尿素沉钒制备高纯五氧化二钒[J].有色金属（冶炼部分）,2018(7):53-56.
Zhang Liuhong,Zhang Yimin,Liu Tao,Huang Jing,Zhang Guobin,Yang Yadong.Preparation of High Purity Vanadium Pentoxide by Urea Precipitation[J].Nonferrous Metals (Extractive Metallurgy),2018(7):53-56.
关注微信公众号