摘要
采用微波技术烧成拜耳法赤泥-渣土陶粒,研究了拜耳法赤泥掺量、烧成温度、保温时间对陶粒吸水率、孔隙率、表观密度的影响,并采用X射线衍射(XRD)和扫描电子显微(SEM)表征其微观结构。结果表明,拜耳法赤泥掺量为20%,烧成温度为1100℃,保温时间为15 min,制备的陶粒性能较好,1 h吸水率为0.25%,孔隙率为0.26%,表观密度为2.06 g/cm^(3);陶粒中形成了赤铁矿、中长石、拉长石、钠长石物相。本研究为拜耳法赤泥和渣土的大规模利用及微波烧成技术制备陶粒提供了参考。
The Bayer red mud-muck ceramsites were sintered under microwave heating,the effects of red mud dosage,sintering temperature and holding time on the water absorption,porosity and apparent density of ceramsites were studied.X-ray diffraction analysis(XRD)and scanning electron microscope analysis(SEM)were used to characterize the ceramsites.Results show that the ceramsites with 20%Bayer red mud,sintered at 1100℃for 15 min have good properties,the 1 h water absorption is 0.25%,the porosity is 0.26%and the apparent density is 2.06 g/cm^(3).The hematite,meso-feldspar,labradorite and sodium feldspar phases are formed in the ceramsites.This research will provide the reference for the large-scale utilization of Bayer red mud and muck as well as the preparation of ceramsites by microwave sintering technology.
作者
罗树琼
江壮壮
张海波
毛宇翔
潘崇根
杨雷
Luo Shuqiong;Jiang Zhuangzhuang;Zhang Haibo;Mao Yuxiang;Pan Chonggen;Yang Lei(Henan Outstanding Foreign Scientists Studio of Green High-performance Building Materials,Henan Key Laboratory of Materials on Deep-Earth Engineering,School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003;School of Resources&Environment,Henan Polytechnic University,Jiaozuo,Henan 454003;School of Civil&Architectural Engineering,Ningbotech University,Ningbo,Zhejiang 315100)
出处
《非金属矿》
CSCD
北大核心
2022年第4期97-101,106,共6页
Non-Metallic Mines
基金
国家自然科学基金(51808196)
河南理工大学博士基金(B2021-15)
河南理工大学博士后基金(672108/106)
宁波市科技创新2025重大专项(2019B10049)
河南理工大学新工科教改项目(672307/111/039)。
关键词
微波烧成
拜耳法赤泥
渣土
陶粒
温度
microwave sintering
Bayer red mud
muck
ceramsites
temperature
