废机油在磷石膏浮选除杂中的应用研究  

Research on the Application of Waste oil in the Flotation of Phosphogypsum

作　　者：张佳妮 周富佳 张昱 余伟健 管青军 ZHANG Jiani;ZHOU Fujia;ZHANG Yu;YU Weijian;GUAN Qingjun(Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《绿色矿冶》2025年第2期30-37,80,共9页Sustainable Mining and Metallurgy

基　　金：国家自然科学基金区域创新发展联合基金(U23A20602),湖南省自然科学基金优秀青年基金(2023JJ20025),湖南省科技创新计划资助(2024RC3214)。

摘　　要：磷石膏是湿法制取磷酸工艺中产生的大宗固废,其堆放对环境造成了严重的危害。针对磷石膏白度低和SiO_(2)含量高,难于资源化利用的问题,以贵州某磷化工企业产生的磷石膏为研究对象,研究了煤油、油酸钠和废机油药剂对磷石膏浮选提纯的影响。结果表明,废机油可以有效去除磷石膏中的SiO_(2)和有机质等杂质,浮选效果最佳。废机油去除磷石膏的最佳条件:矿浆pH值为2.0,浮选矿浆浓度为20%,废机油用量为40 g/t,起泡剂MIBC用量为300 g/t。在此最佳条件下,可获得精矿产率为91.72%,白度为63.43%,品位为97.54%,实现二水硫酸钙与有机质的有效分离,该研究对磷石膏后续实现资源化、高值化利用具有重要的指导意义。Phosphogypsum is a bulk solid waste produced in the process of phosphoric acid hydrometallurgy,and its stacking has caused serious harm to the environment.Aiming at the problem that phosphogypsum is difficult to be recycled due to low whiteness and high SiO_(2) content,the influence of kerosene,sodium oleate and waste engine oil on flotation purification of phosphogypsum was studied by taking phosphogypsum produced by a phosphorus chemical enterprise in Guizhou as the research object.The results show that waste engine oil can effectively remove impurities such as SiO_(2) and organic matter in phosphogypsum,and the flotation effect is the best.The optimum conditions for the removal of phosphogypsum by waste engine oil are as follows:the pH value of pulp is 2.0,the concentration of flotation pulp is 20%,the amount of waste engine oil is 40 g/t,and the amount of MIBC is 300 g/t.Under the optimum experimental conditions,the concentrate yield is 91.72%,the whiteness is 63.43%,the grade is 97.54%,and the effective separation of dihydrate gypsum and organic matter is realized.This study has important guiding significance for the subsequent realization of resource and high-value utilization of phosphogypsum.

关 键 词：磷石膏 浮选 有机质去除 二氧化硅 白度 

分 类 号：TQ177.375[化学工程—硅酸盐工业]