浮选净化对磷石膏制备β−半水石膏性能的影响  

Effect of Flotation Purification on Preparation ofβ—Hemihydrate Gypsum from Phosphogypsum

作　　者：王进明[1,2,3,4,5] 杜明霞 李国欢 董发勤 谭宏斌[1,4] WANG Jinming;DU Mingxia;LI Guohuan;DONG Faqin;TAN Hongbin(School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;State Key Laboratory of Mineral Processing,Beijing 100192,China;State Key Laboratory of Solid Waste Reuse for Building Materials,Beijing 100041,China;Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Engineering Lab of Non−metallic Mineral Powder Modification&High−value Utilization,Mianyang 621010,sichuan,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]矿物加工科学与技术国家重点实验室,北京100192 [3]固废资源化利用与节能建材国家重点实验室,北京100041 [4]固体废物处理与资源化教育部重点实验室,四川绵阳621010 [5]四川省非金属矿粉体改性与高值化利用技术工程实验室,四川绵阳621010

出　　处：《矿产保护与利用》2023年第4期107-113,共7页Conservation and Utilization of Mineral Resources

基　　金：矿物加工科学与技术国家重点实验室平台基金项目(BGRIMM−KJSKL−2022−21);固废国家重点实验室平台基金项目(SWR−2019−003)。

摘　　要：磷石膏是磷化工行业产生的大宗工业固废,其中的杂质会降低磷石膏制备β−半水石膏的性能。采用浮选法对磷石膏进行净化提纯,并对比净化前后磷石膏所制备β−半水石膏的性能。研究结果表明:采用甲基异丁基甲醇为起泡剂反浮选可脱除微细矿泥及有机杂质,采用十二胺可浮出二水石膏。闭路浮选精矿与磷石膏原矿相比,白度从19.4%提升到41.1%,纯度从73.12%提升到96.41%。利用磷石膏精矿制备β−半水石膏的2 h抗折强度、2 h抗压强度、3 d干抗压强度和原样制备的相比分别提升22.8%、14.1%、24.1%,白度从27.8%提升到46.3%。采用浮选净化能显著提高磷石膏制备β−半水石膏的性能。Phosphogypsum produced by phosphorus chemical industry is the bulk industrial solid waste.The impurities would reduce the performance ofβ−hemihydrate gypsum that was prepared from phosphogypsum.In this study,phosphogypsum was purified by flotation method,and the performance ofβ−hemihydrate gypsum prepared from phosphogypsum before and after purification was compared.The results showed that the fine slime and organic impurities were removed by reverse flotation with methyl isobutyl methanol as foaming agent,and the dihydrate gypsum was floated by dodecamine.Compared with phosphogypsum ore,the whiteness and purity of the concentrate increased from 19.4%to 41.1%and 73.12%to 96.41%,respectively.The 2−hour flexural strength,compressive strength and 3−day dry compressive strength ofβ−gypsum that was prepared from phosphogypsum concentrate were 22.8%,14.1%and 24.1%higher than those was prepared from raw ore,respectively.Whiteness increased from 27.8%to 46.3%.Flotation purification can significantly improve the performance of phosphogypsum inβ−gypsum preparation.

关 键 词：磷石膏 浮选 净化提纯 β石膏 强度 

分 类 号：TD923[矿业工程—选矿] TQ177.3[化学工程—硅酸盐工业]