二水法磷酸改半水-二水法或二水-半水法工艺路线探讨  

Discussing on phosphoric acid process route of dihydrate process transformed into semihydrate-dihydrate process or dihydrate-semihydrate process

作　　者：匡国明 KUANG Guoming(Guizhou Chemical Industry Association,Guiyang 550002,China)

机构地区：[1]贵州省化学工业协会,贵州贵阳550002

出　　处：《磷肥与复肥》2019年第2期28-29,共2页Phosphate & Compound Fertilizer

摘　　要：针对二水法磷酸杂质含量高、过滤酸浓度低、副产磷石膏质量差等缺点,提出将其技改为半水-二水法磷酸、二水-半水法磷酸。分析半水-二水法磷酸、二水-半水法磷酸工艺优缺点,介绍改造内容及方案,并进行工艺比较。二水-半水法适合只考虑磷石膏资源化利用、企业自有硫酸副产蒸汽配套的企业,半水-二水法适合磷酸用于制造高端磷化工产品的企业。Based on the disadvantage of dihydrate phosphoric acid including high impurity content,low concentration of phosphoric acid,low quality of phosphongypsum,it is put forward that dihydrate phosphoric acid is transformed into semihydrate-dihydrate phosphoric acid or dihydrate-semihydrate phosphoric acid.The technology advantages and disadvantages of emihydrate-dihydrate phosphoric acid and dihydrate-semihydrate phosphoric acid are analyzed,and the transformation content and scheme are introduced,the processes are compared.The dihydrate-semihydrate phosphoric acid is advisable for the enterprises consider the utilization rate of phosphogypsum and have own sulfate by-product steam,the semihydrate-dihydrate phosphoric acid is advisable for using phosphoric acid to produce high-end phosphorus chemical products.

关 键 词：二水法磷酸 半水-二水法磷酸 二水-半水法磷酸 质量 工艺比较 

分 类 号：TQ126.35[化学工程—无机化工]