无水氟化氢作为氟化工的基础原料,传统工艺多为萤石硫酸法制备,随着萤石资源日益匮乏和国家对萤石资源的限制开采,如何大力开发低品位氟资源、实现高效循环利用成为氟化工面临的重要问题。对此,重点研究了磷肥行业副产氟硅酸制备高附加值无水氟化氢并联产优质硫酸镁的工艺方法,详细剖析了实验过程各关键控制参数的影响,包括原料浓度、原料配比、反应温度、反应时间等,完成了副产低品位氟硅资源的循环高效开发,解决了制约相关行业发展的瓶颈问题,其经济效益、环保效益和社会效益显著。

Anhydrous hydrogen fluoride,a basic material in fluorine chemical industry,is traditionally prepared by fluorite-sulfuric acid method.With the increasing scarcity of fluorite resources and the limited exploitation of fluorite resources by the state,it is of crucial importance for fluorine chemical industry to develop highly-efficient recycling of low-grade fluorine resources.The process of preparing high-value-added anhydrous hydrogen fluoride and combined production of high-quality magnesium sulfate by fluorosilicic acid which was the by-product in the phosphate fertilizer industry was studied.The effects of various key control parameters in the experimental process,including raw material concentration,raw material ratio,reaction temperature and the reaction time etc.,were analyzed.The highly-efficient recycling development of low-grade fluorosilicon resources by-products had been completed,and the bottleneck problem that restricted the development of related industries had been solved.Its economic benefits,environmental protection benefits and social benefits were remarkable.