常压溶液法磷石膏中可溶杂质去除规律的分析研究

发布时间：2018-02-24 01:28

  本文关键词： 磷石膏 综合利用 HCl-H_O体系 除杂　出处：《应用化工》2017年07期 　论文类型：期刊论文

【摘要】：在HCl-H_2O体系中利用溶液法对磷石膏进行除杂,研究溶液pH值、反应时间、固液比及温度对磷石膏中可溶性磷和可溶性氟的去除率的影响。结果表明,HCl-H_2O体系除杂的最佳工艺参数为:pH=1,时间2 h,固液比=1∶3 g/mL,温度103℃。此工艺下,可溶性磷、氟的去除率分别达到88.73%和93.77%,磷石膏中残余的可溶性杂质含量低至W_(P_2O_5)=0.08%,W_(F-)=0.005%,能够满足GB/T 23456—2009中作为石膏建材的要求,且具有经济可行性。
[Abstract]:Phosphorus gypsum was removed by solution method in HCl-H_2O system. The pH value of solution and reaction time were studied. The effect of solid-liquid ratio and temperature on the removal rate of soluble phosphorus and soluble fluoride in phosphogypsum. The results show that the optimum technological parameters for removing impurities in the system of HCl-H _ 2O are as follows: 1: 1, time 2 h, solid-liquid ratio 1: 3 g / mL, temperature 103 鈩，

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