磷石膏中可溶磷、可溶氟的水洗脱除研究  

Removal of soluble phosphorus and fluorine from phosphogypsum by water washing

作　　者：徐思婷 梁处芳 张瞿天 田梦 张立森 池汝安[1,2] 周芳 XU Siting;LIANG Chufang;ZHANG Qutian;TIAN Meng;ZHANG Lisen;CHI Ru'an;ZHOU Fang(School of Resources Safety Engineering,Wuhan Institute of Technology,Wuhan 430074,China;Hubei Three Gorges Laboratory,Yichang 443007,China)

机构地区：[1]武汉工程大学资源与安全工程学院,湖北武汉430074 [2]湖北三峡实验室,湖北宜昌443007

出　　处：《武汉工程大学学报》2025年第2期181-186,共6页Journal of Wuhan Institute of Technology

基　　金：湖北省技术创新计划项目重点研发专项(2023BCB114);湖北三峡实验室创新基金(SC240001、SC211013);湖北省青年拔尖人才计划项目。

摘　　要：为了将磷化工行业在磷酸生产过程中产生的工业固体废弃物磷石膏中的磷、氟等有害杂质脱除,使其得到更好的资源化再利用,采用水洗法对磷石膏中可溶磷和可溶氟进行脱除,分别探究液固比、水洗时间和水洗温度对可溶磷和可溶氟脱除率的影响,采用SPSS软件设计正交试验,探讨多因素共同作用下的水洗优化工艺条件。正交试验结果表明,液固比2∶1,水洗温度70℃,水洗时间5 min时,脱除效果最优,可溶磷脱除率为94.82%,可溶氟脱除率为89.40%,处理后磷石膏中可溶磷和可溶氟的质量分数分别从0.34%和0.84%降为0.089%和0.044%,符合《磷石膏》(GB/T 23456—2018)中一级品的指标要求。Phosphogypsum is an industrial solid waste produced by the phosphorus chemical industry in the process of phosphoric acid production.Removal of phosphorus,fluorine and other harmful impurities from phosphogypsum can enable better resource utilization.In this study,the effects of liquid-to-solid ratio,washing time and washing temperature on the removal rates of soluble phosphorus and soluble fluorine in phosphogypsum were investigated in accordance with the washing process,and orthogonal experiments were designed using the SPSS software to obtain the optimized process conditions under the combined effect of multiple factors.The results showed that under liquid-to-solid ratio of 2∶1,washing temperature of 70℃,and washing time of 5 min,the best removal effect was achieved:the removal rates of soluble phosphorus was 94.82%and that of soluble fluorine 89.40%.The mass fraction of soluble phosphorus and soluble fluorine in phosphogypsum was reduced from 0.34%and 0.84%to 0.089%and 0.044%,respectively,meeting the grade one standards of“Phosphogypsum”in GB/T 23456—2018.

关 键 词：磷石膏 水洗法 正交实验 脱除率 

分 类 号：TQ177.375[化学工程—硅酸盐工业]