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湿法磷酸是磷化工中重要的中间产物，但是其常含有氟等杂质，不仅影响产品的质量和纯度，而且会造成环境污染；随着氟资源日趋稀缺，降低湿法磷酸氟含量、提高氟资源回收利用效率已成为重要课题。综述湿法磷酸化学反应脱氟、物理吸附脱氟、真空浓缩脱氟的原理；介绍云南云天化红磷化工有限公司在湿法磷酸生产中加入脱氟剂提高脱氟效率的探索。通过对湿法磷酸浓缩工艺进行优化和添加二氧化硅脱氟剂，产品磷酸中的氟含量显著降低，w(F)由1.6%降低至0.93%，氟回收率大幅度提高，吨P2O5氟回收量由43.70 kg提升至64.90 kg，带来可观的经济效益。将脱氟剂应用于湿法磷酸生产，不仅可以提高磷酸产品品质，提高氟资源利用率，而且可以有效降低生产成本，减少环境污染。
Abstract：Wet-process phosphoric acid is an important intermediate product in phosphorus chemical industry, but it often contains impurities such as fluorine, which not only affects the quality and purity of the product, but also causes environmental pollution; With the increasing scarcity of fluorine resources, reducing the fluorine content in wet-process phosphoric acid,improving the efficiency of fluorine resource recovery and utilization have become important issues. The principles of chemical reaction desorption defluorination, physical adsorption defluorination,and vacuum concentration defluorination for wet-process phosphoric acid are summarized; The exploration of adding defluorination agents in wet-process phosphoric acid production to improve defluorination efficiency in Yunnan Yuntianhua Red Phosphorus Chemical Co., Ltd. is introduced. By optimizing the wet-process phosphoric acid concentration process and adding silica defluorination agent, the fluorine content in the phosphoric acid product is significantly reduced, with w(F)decreasing from 1.6% to 0.93%. The fluorine recovery rate is greatly improved,and the fluorine yield is increased from 43.70 kg to 64.90 kg for per ton of P2O5, bringing considerable economic benefits. Applying defluorination agents to wet-process phosphoric acid production can not only improve the quality of phosphoric acid products and increase the utilization rate of fluorine resources, but also effectively reduce production costs and environmental pollution.
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基本信息:
DOI：
中图分类号:TQ126.35
引用信息:
[1]周华波,张猛,刘文凯.提高湿法磷酸浓缩脱氟效率的工艺优化[J].生态产业科学与磷氟工程,2025,40(06):45-49.
基金信息: