低品质粉煤灰制备蒸压多孔保温材料研究  

Preparation of Autoclaved Porous Heat Insulating Material with Inferior Fly Ash

作　　者：王涵[1] 杨赞中[1] 刘敏[1] 丁琪[1] 吴奇阳 乐红志[1] 

机构地区：[1]山东理工大学材料科学与工程学院,山东淄博255049

出　　处：《现代技术陶瓷》2016年第1期62-68,共7页Advanced Ceramics

基　　金：山东省自然科学基金(ZR2012EMM016;ZR2014EL005);山东省科技发展计划(2014GZX-201008)

摘　　要：本文探讨了利用内蒙古煤炭燃烧后形成的低品质粉煤灰制备蒸压多孔保温材料的可行性。研究了粉煤灰的性质,通过正交试验确定了原料配合比,探讨了蒸压制度与制品性能的关系。结果表明,内蒙粉煤灰的玻璃相含量低,反应活性差,经Na_2CO_3激发可有效提高其活性。按水/料比为0.52,粉煤灰:石灰:水泥:石膏:铝粉膏:Na_2CO_3=70:19:9:2:0.13:0.5(wt%)配料,置于蒸压釜内以3.5°C/min升温至压力达到1.1 MPa(188°C)后恒压6 h,得到干密度为493.8kg/m^3、抗压强度为3.88 MPa,导热系数为0.109 W/(m·K)的制品。制品的各项技术指标均超过国标对B05级优等品的要求。Autoclaved porous heat insulating material was prepared by using inferior fly ash from Inner Mongolia. Based on the property characterization of fly ash, the combination ratio of raw materials was determined by orthogonal experiment, and the relationship between the autoclaved system and product performances was discussed. It was shown that the reactivity of fly ash is poor because of its low glass phase content, and that can be effectively improved by adding Na_2CO_3. Samples in investigation were prepared by compounding materials in accordance with the mass ratio of fly ash ： lime ： cement ： gypsum ： Na_2CO_3 = 70：19：9：2：0.5, and by autoclaving at 188°C under hydrothermal conditions with steam pressure 1.1 MPa for 6h. The dry density, compressive strength, and thermal conductivity of the resultant porous heat insulating material are 493.8 kg/m^3, 3.88 MPa, and 0.109 W/（m·K） respectively.

关 键 词：低质粉煤灰 多孔材料 活性激发 正交试验 蒸压制度 

分 类 号：TQ536.4[化学工程—煤化学工程]