化工矿物与加工2025，Vol.54Issue(5)：19-26,8.DOI:10.16283/j.cnki.hgkwyjg.2025.05.003
基于沉淀法和吹脱法的磷石膏浮选废水脱磷氟氮工艺研究
Research on the process of phosphorus,fluoride and nitrogen removal fromflotation effluent of phosphogypsum based on precipitation and air stripping method
摘要
Abstract
Phosphogypsum flotation effluent contains impurities such as phosphorus,fluorine,and nitrogen,which can reduce the performance of phosphogypsum products.This article explores the effects of CaO addition time inter-vals on the particle size and microstructure of precipitation products in simulated flotation effluent containing phos-phorus(fluorine)and ammonia nitrogen by precipitation method and air stripping method.The results show that in simulated flotation effluent containing phosphorus,as the CaO addition time interval increases,the particle size of pre-cipitation products gradually increases.The average particle size of precipitation products at a time interval of 40 minutes is 20 μm;The addition time interval of CaO has little effect on the crystallization effect of the precipitation products of fluorine-containing simulated flotation effluent,with an average particle size of 1～2 μm.When CaO was added to the phosphogypsum flotation effluent discharged by a certain enterprise in Sichuan with a time interval of 40 minutes,the average particle size of the precipitate was 20 μm.The mass concentrations of phosphorus and fluoride in the treated wastewater were 22.4 mg/L and 46.2 mg/L,respectively,and the removal rates were 99.8%and 94.9%,respectively;The static blow off treatment of ammonia nitrogen was carried out on the phosphogypsum flota-tion effluent from which phosphorus and fluoride had been removed.The results show that when the aeration rate was 1.5 m3/L,the CaO addition rate was greater than 2 g/L,and the deamination agent dosage was 0.1 g/L,the residual mass concentration of ammonia nitrogen in the phosphogypsum flotation effluent was 7.8 mg/L,and the removal rate reached 97.47%.The treated wastewater can be recycled.关键词
磷石膏/浮选废水/沉淀法/吹脱法/结晶/氧化钙/曝气Key words
phosphogypsum/flotation effluent/precipitation method/air stripping method/crystallization/calcium oxide/aeration分类
化学化工引用本文复制引用
陈佳俊,钟晋,钟世林,都兰勇,王进明,谭宏斌,闵杰林,彭贤清,文帅,冷为贵,赵国军,孟庆坤,方进,郭旭东..基于沉淀法和吹脱法的磷石膏浮选废水脱磷氟氮工艺研究[J].化工矿物与加工,2025,54(5):19-26,8.基金项目
四川省科技厅项目(2024ZHCG0127) （2024ZHCG0127）
西南科大四川天府新区创新研究院基金项目 （）
固体废物处理与资源化教育部重点实验室开放课题资助项目(20kfgk01,21kfgk01). （20kfgk01,21kfgk01）
