磷石膏基Ⅱ型无水硫酸钙胶凝材料制备与表征  

Preparation and characterization of phosphogypsum based type Ⅱ anhydrous calcium sulfate cementitious material

作　　者：曹宏[1] 王海洋 吴晶 李蕾 马会娟 薛俊[1] 江吉周 CAO Hong;WANG Haiyang;WU Jing;LI Lei;MA Huijuan;XUE Jun;JIANG Jizhou(School of Materials Science and Engineering,School of Environmental Ecology and Biological Engineering,Novel Catalytic Materials of Hubei Engineering Research Center,Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education,Wuhan 430205,China;Key Laboratory of Rare Mineral,Ministry of Natural Resources,Geological Experimental Testing Center of Hubei Province,Wuhan,430034,China;Hubei Three Gorges Laboratory,Yichang,443000,Hubei,China)

机构地区：[1]武汉工程大学材料科学与工程学院/环境生态与生物工程学院,新型催化材料湖北省工程研究中心/磷资源开发利用教育部工程研究中心,武汉430205 [2]湖北省地质实验测试中心,自然资源部稀土稀有稀散矿产重点实验室,武汉430034 [3]湖北三峡实验室,湖北宜昌443000

出　　处：《华中师范大学学报(自然科学版)》2025年第1期9-17,共9页Journal of Central China Normal University:Natural Sciences

基　　金：磷资源开发利用教育部工程研究中心创新基金项目(LCX202303);湖北三峡实验室创新基金项目(SC213012).

摘　　要：大规模无害化、资源化利用磷石膏是解决“三磷”问题、推动磷石膏源头减量减排和磷化工产业绿色发展的关键.开发Ⅱ型无水硫酸钙胶凝材料可有效扩大磷石膏的应用领域和规模,促进磷石膏问题的解决.以磷石膏基Ⅱ型无水硫酸钙为主要原料,通过极端顶点设计实验,探讨了原料配比与胶凝材料性能之间关系,得到了软化系数≥0.8,强度等级为A40、A30、A20的胶凝材料配方,制备了适合不同应用场景的磷石膏基Ⅱ型无水硫酸钙胶凝材料.按相应国家标准对所制备胶凝材料浸出液的磷(P)、氟(F)含量进行了检测,其指标均低于GB 18599—2020第I类一般工业固废的污染物浓度控制标准.因此磷石膏基硬石膏(PAH)胶凝材料可用作矿井(矿坑)充填胶结料、户外建材和一般建材的胶结料,为拓展磷石膏的绿色应用场景提供了更多的可能性、或可扩大磷石膏应用量.Large-scale non-hazardous and resourceful utilization of phosphogypsum is crucial for addressing the“three phosphorus”issues,promoting the reduction and emission mitigation of phosphogypsum at the source,and facilitating the green development of the phosphorus chemical industry.The development of Type Ⅱ anhydrous calcium sulfate gelling materials can effectively broaden the application fields and scale of phosphogypsum,thereby accelerating the resolution of phosphogypsum-related issues.Using phosphogypsum-based Type Ⅱ anhydrous calcium sulfate as the primary raw material,and through extreme vertices design experiments,the relationship between raw material proportions and the properties of gelling materials was explored.Cementitious materials with a softening coefficient of at least 0.8 and strength levels such as A40,A30,and A20 were generated,and phosphogypsum-based type Ⅱ anhydrous calcium sulfate cementitious materials apt for various application contexts were prepared.The P and F acids in the leachate of the cement-based materials were assessed against national norms,and the results showed that both indicators were below the pollutant concentration control standards for Class I general industrial solid waste specified in GB 18599—2020.Therefore,phosphogypsum-anhydrite-hydrate(PAH)gelling materials could be used as filling and cementing materials for mine shafts(pits),as well as cementing materials for outdoor and general building materials,offering more possibilities for expanding the green application scenarios of phosphogypsum and potentially increasing its utilization volume.

关 键 词：磷石膏 Ⅱ型无水硫酸钙胶凝材料 强度 耐水性 

分 类 号：V254.2[一般工业技术—材料科学与工程]