改性脱硫建筑石膏加气砌块制备工艺参数及其对性能的影响  

Preparation and properties of aerated blocks from modified calcined gypsum from flue gas desulfurization

作　　者：周飞[1] 杨久俊[1,2] 王芳[3] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450052 [2]天津城市建设学院,天津300382 [3]内蒙古科技大学,内蒙古包头014010

出　　处：《新型建筑材料》2012年第6期20-23,29,共5页New Building Materials

基　　金：国家自然科学基金项目(50972099);国家科技支撑计划项目(2012BAJ20B01)

摘　　要：利用燃煤电厂烟气脱硫所产的脱硫石膏制备β型脱硫建筑石膏,在组分复合改性提高强度和耐水性的基础上,探讨了改性脱硫建筑石膏制备加气砌块的工艺参数。结果表明:当m(β型脱硫建筑石膏)∶m(生石灰)∶m(水泥)∶m(粉煤灰)=60∶12∶12∶16时,可以使复合改性脱硫石膏基胶凝材料的抗压强度达到18.7 MPa,软化系数为0.7;在水料比为50%、料浆温度为35℃、铝粉用量为0.2%工艺参数下,制备出了体积密度和抗压强度分别为668 g/cm3和2.8 MPa的加气复合改性石膏砌块,找到了为脱硫石膏资源化利用的新途径。In this paper, aerated blocks were prepared from calcined gypsum from flue gas desulfurization （FGD） of coal-fired thermal power plant,the influence of materials components and process parameters on the properties of aerated blocks were inves- tigated. The resuhs show that,the strength and water resistance of calclined gypsum from FGD has greatly improved by mixing with fly ash,lime,amt cement. When the mix ratio of calclined gypsum,lime,cement,fly ash is 60%：12%：12%：16%,the strength and softening coefficient of compound modification calclined gypsum from FGD reach to 18.7 MPa and 0.7 respectively. The aerated block with compressive strength of 2.8 MPa and bulk density of 668 g/cm^3 is prepared when the process parameters are as follows： water to hinder ratio is 50%,mixing temperature at 35 ℃,aluminum powder content is 0.2%. This technique presents a convenient method to prepare aerated blocks and an effective way to utilize flue gas desulfurization.

关 键 词：脱硫建筑石膏 改性 加气砌块 水料比 搅拌温度 铝粉用量 

分 类 号：TQ174.769[化学工程—陶瓷工业]