常压醇水法制备α-高强石膏的工艺条件研究  

Study on Process Conditions for Preparation of α-high Strength Gypsum by the Glycerol Water Method under Atmospheric Pressure

作　　者：吴传龙[1,2] 董发勤[2] 陈德玉[1] 何平[1] 徐中慧[2] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010

出　　处：《西南科技大学学报》2016年第4期33-37,共5页Journal of Southwest University of Science and Technology

基　　金：国家高技术研究发展计划(863计划)(2011AA06A106);四川省科技支撑项目(2010GZ0300);固废资源化利用与节能建材国家重点实验室开放基金(SWR-2013-005)

摘　　要：以磷石膏为原料,采用常压醇水法制备α-高强石膏。探讨了醇质量分数、反应温度、反应时间、转晶剂等因素对α-高强石膏晶体形貌的影响,确定了磷石膏制备α-高强石膏的最佳工艺条件:醇质量分数50%、反应温度105℃、反应时间4 h、固液质量比1:5。当掺入质量分数0.5%丁二酸和0.05%顺丁烯二酸时,可获得长径比分别为3:1,1:1的短柱状晶体,48 h干抗压强度分别为30.5 MPa,33.6 MPa。α- high strength gypsum was prepared by the glycerol water method under atmospheric pressure and using the phosphogypsum as raw materials. The influences of glycerol centration,reaction temperature and reaction time,crystal modifier on the morphology of α- high strength gypsum were studied.The optimal technological conditions for preparing α- high strength gypsum using phosphogypsum were determined as follows： the concentration of glycerol 50%,reaction temperature 105 ℃,reaction time 4h,solid to liquid ratio 1： 5. The results showed that： hexagonal prism shape crystal with aspect ratio close to 3：1 and 1：1 were obtained and 48 h dry compressive strength was 30. 5 MPa and 33. 6 MPa by adding0. 5% succinic acid and 0. 05% maleic acid,respectively.

关 键 词：α-高强石膏 磷石膏 醇水法 

分 类 号：X705[环境科学与工程—环境工程] TQ177.34[化学工程—硅酸盐工业]