钛白废酸中亚铁结晶过程的实验研究  

Study on crystallization of ferrous sulfate from titanium white waste sulfuric acid

作　　者：段兰娟 叶世超[1] 文军 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川龙蟒钛业股份有限公司,四川绵竹618200

出　　处：《现代化工》2016年第9期92-95,共4页Modern Chemical Industry

摘　　要：针对硫酸法钛白工艺中亚铁结晶效率低的问题,模拟实际生产过程建立了配酸冷却结晶实验装置,研究了结晶料液温度、熟化时间、过饱和度、杂质质量分数对结晶过程的影响。研究结果表明,实验范围内,不同熟化温度下熟化时间对结晶过程影响程度不同;在高温下延长熟化时间或者降低配酸质量分数,游离酸质量分数会降低,但滤酸中的杂质质量分数升高;返酸量越大,亚铁渣游离酸质量分数越低;杂质钛增加硫酸亚铁在溶液中的介稳区宽度。A device has been established for simulating the actual production process of ferrous sulfate to get better products. The effects of factors,such as crystallization temperature,aging time,supersaturation and the impurity content existing in the process,are discussed to increase the particle diameter. The results show that the aging time under different temperature conditions has different effects on the crystallization. Extending aging time at high temperature or reducing the concentration of mixed acid can result in the reduction of the sulfate acid content or the increase of the amount of the returned filtration residue. Titanium impurities increase the width of ferrous sulfate crystallization metastable zone in sulfuric acid.

关 键 词：钛白废酸 硫酸亚铁 配酸 结晶 

分 类 号：P578.7[天文地球—矿物学] TQ026.5[天文地球—地质学]