硝酸酸解磷尾矿制备氢氧化镁工艺条件研究

发布时间：2018-06-08 08:14

  本文选题：磷尾矿 + 酸解　； 参考：《现代化工》2017年05期

【摘要】：以磷尾矿经硝酸复合溶剂酸解、除铁等纯化过程得到的镁源为原料,采用碱性沉淀剂制备氢氧化镁。探讨了不同沉淀剂、沉淀剂滴加速度、沉淀温度、陈化时间对产品纯度及回收率的影响。实验结果表明,当选择氨水为沉淀剂,滴加氨水使溶液pH达到11.5,滴加速度为1.5 m L/min,沉淀反应温度为45℃,陈化时间为120 min,在此条件下镁回收率为89.86%,产品Mg(OH)2纯度为90.43%。并用XRD、粒度分析仪和SEM分别对产物的成分、粒度分布以及形貌特征进行分析,测试表明,产品粒度均匀,呈片状。
[Abstract]:Magnesium hydroxide was prepared by alkaline precipitating agent from magnesium source obtained from the purification process of phosphorus tailings by acid hydrolysis with nitric acid complex solvent and iron removal. The effects of different precipitators, precipitator droplet acceleration, precipitation temperature and aging time on the purity and recovery of the product were discussed. The experimental results show that when ammonia water is chosen as precipitant, the pH of solution reaches 11.5, the drop acceleration is 1.5 mL / min, the precipitation reaction temperature is 45 鈩，

本文编号：1995291