氟氯在硫酸锌溶液蒸发结晶及结晶产物干燥过程中的行为

发布时间：2018-05-17 00:31

  本文选题：硫酸锌溶液 + 蒸发　； 参考：《湿法冶金》2017年05期

【摘要】：研究了硫酸锌溶液蒸发浓缩、冷却结晶及结晶产物干燥过程中氟、氯的行为,考察了初始硫酸质量浓度、干燥温度和干燥时间等因素对氟、氯行为的影响。结果表明:在试验条件下,硫酸锌溶液蒸发过程中,95.0%以上的氟、氯保留在液相;冷却结晶后,氯主要分布在液相,氟主要分布在固相;结晶产物干燥过程中,氟、氯均能得到不同程度脱除,提高干燥温度或延长干燥时间有利于氟、氯脱除;氟离子质量浓度为3.0g/L、硫酸质量浓度为31.2g/L的硫酸锌溶液蒸发结晶所得产物在110℃下干燥9h,氟脱除率为91.9%;氯离子质量浓度为6.0g/L、硫酸质量浓度为16.8g/L的硫酸锌溶液蒸发结晶所得产物在110℃下干燥3h,氯脱除率为99.0%。
[Abstract]:The behavior of fluoride and chlorine in the drying process of crystallization and crystallization of zinc sulfate solution was studied. The effects of initial sulfuric acid concentration, drying temperature and drying time on the behavior of fluorine and chlorine were investigated. The results show that more than 95.0% of fluorine in zinc sulfate solution is kept in liquid phase during evaporation, chlorine mainly distributes in liquid phase after cooling and crystallization, fluorine mainly distributes in solid phase, fluorine is mainly distributed in drying process of crystallization product, Chlorine can be removed to different degrees, increasing drying temperature or prolonging drying time is beneficial to fluorine removal and chlorine removal. When the concentration of fluorine ion is 3.0 g / L, the product of zinc sulfate solution with sulfuric acid concentration of 31.2g/L is evaporated and crystallized at 110 鈩，

本文编号：1899107