摘要
以一种即将工业化的固体废弃物白泥为原料,一种膨胀性黏土黑棉土为助熔剂,油页岩半焦为发泡剂成功制备出一类新型陶粒,产品满足GB/T17431-2010中给定的超轻陶粒标准。给出实验优化条件,即:原料配比为7:7:6(白泥:黑棉土:油页岩半焦),最佳烧结制度为450℃下预烧15 min后升温至1230℃,烧结15 min。探究了膨胀陶粒的烧结工艺与原始物料成分适用关系,烧结过程中的物相转变规律,并修正了Riley相图有关制备发泡陶粒的成分范围。实验结果表明:所制备的陶粒堆积密度为355 kg/m^3、密度等级400级、吸水率为10.22%、孔隙率为49.06%。采用了热重(TG)、偏光显微镜(OLYMPUS)和扫描电镜(SEM)等表征方法对陶粒孔的形成过程进行了研究。
A type of ultra-light ceramsite has been successfully prepared with raw material of white mud which is an industrial solid waste, fluxing agent of black cotton regur soil which is a swelling clay, and foaming agent of oil shale semi-coke. The ultra-light ceramsite, which meets the national standard GB/T 17431-2010, were produced under the optimized experimental conditions of the raw materials mass ratio(white mud: black cotton regur soil: oil shale semi-coke) of 7:7:6 and the optimal sintering procedure of being pre-sintered at 450 ℃ for 15 min and further being sintered at 1230 ℃ for 15 min. We have explored the suitable relationship between the sintering process of expanded ceramsite and raw material compositions, discussed the regulation of phase transition in the sintering process, and modified the range of compositions for preparing the foam ceramsite in the Riley’s phase diagram. The prepared ceramsites have a bulk density of 355 kg/m^3, a density rating of 400, a water absorption rate of 10.22%, and a porosity of 49.06%. The formation process of the ceramsite has been investigated using thermogravimetric(TG) analyses, polarizing microscopy(OLYMPUS), and scanning electron microscopy(SEM).
作者
朱富杰
张砚
周烁
魏存弟
苗世顶
ZHU Fu-jie;ZHANG Xian;ZHOU Shuo;WEI Cun-di;MIAO Shi-ding(Solid Waste Recycling Engineering Research Center ofJilin Province,Open Research Laboratory for Physicochemical Testing Methods of Functional Minerals,Ministry of Land and Resources,Jilin University,Changchun 130022,China)
出处
《矿物学报》
CAS
CSCD
北大核心
2019年第5期577-584,共8页
Acta Mineralogica Sinica
基金
国家自然科学基金项目(批准号：U1607122
51874145)
吉林大学“大学生创新创业训练计划”创新训练项目
吉林省省校共建项目——新材料专项(SXGJSF2017-3)
关键词
超轻质陶粒
白泥
黑棉土
油页岩半焦
物相转变
Riley相图分析
The ultra-light ceramsite
white mud
black cotton regur soils
oil shale semi-coke
phase transition
the Riley phase diagram analysis
