偏钒酸钠制取技术研究

• 作 者: 殷兆迁 李千文 彭一村 吴刘柱 潘少彦
• 机 构: 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,攀钢集团钒业公司,
• 出 处: 钢铁钒钛
• 发表日期: 2015年02期
• 关键词: 偏钒酸钠 多钒酸铵 脱氨 钒收率 结晶剂 结晶时间 钒酸钠溶液 搅拌强度 结晶条件 折点氯化法

以多钒酸铵为原料,采用返溶除杂、溶液脱氨、溶析结晶的方法,制备了纯度大于99.5%的偏钒酸钠产品。通过研究表明:影响脱氨过程脱氨时间的主要因素为溶液终点p H值;最佳溶析结晶条件为[V]浓度150~200g/L,p H值为7.3~8.1,结晶剂与溶液体积比为1∶1,结晶时间为1 h,钒收率达到了97.7%。

Using ammonium vanadate as raw material, the product of sodium metavanadate with the purity of more than 99.5% was prepared by the method of dissolving back to the solution, deammoniation of the solution and crystallization by dissolution. The results show that the main factor affecting the deamination time in deamination process is the end point p H value of the solution; the optimum conditions for the dissolution and crystallization are 150-200 g / L [V], 7.3 ~ 8.1 p H, The volume ratio was 1: 1, the crystallization time was 1 h and the vanadium yield was 97.7%.