预热工艺对赤泥陶粒烧成特性及性能的影响  

Influence of preheating process on the sintering characteristics and properties of red mud ceramsite

作　　者：王继娜 徐开东 李志新 李青霄 包云 杨欢 丁凌凌 袁旭波 李星晨 Wang Jina;Xu Kaidong;Li Zhixin;Li Qingxiao;Bao Yun;Yang Huan;Ding Lingling;Yuan Xubo;Li Xingchen(School of Material and Chemical Engineering,Henan University of Urban Construction,Pingdingshan 467036,China;Collaborative Innovation Center for Comprehensive Disposal and Ecological Utilization of Urban Solid Waste of Henan Province,Pingdingshan 467036,China)

机构地区：[1]河南城建学院材料与化工学院,河南平顶山467036 [2]河南省城市固废综合处置与生态利用协同创新中心,河南平顶山467036

出　　处：《轻金属》2021年第5期21-25,共5页Light Metals

基　　金：河南省省级新型墙体材料专项基金项目(项目编号:20170223);河南省自然科学基金项目(项目编号:182300410135)。

摘　　要：采用烘干炉-预热炉-烧成炉“三炉联用”模拟烧结机生产陶粒的方式,研究了适宜于赤泥陶粒生产的预热温度和预热时间,重点研究不同预热温度和保温时间对赤泥陶粒宏、微观形貌结构及强度、吸水率、堆积密度等基本物理、力学性能的影响。研究结果表明,优化的预热温度为550℃、预热时间15 min,且在焙烧温度1115℃、焙烧时间15 min的条件下制备的赤泥陶粒,其整体陶质化特征显著,表面粗糙,表层呈典型玻化特征,内部孔隙均布;赤泥陶粒的单粒强度达1.63 MPa、孔隙率41.9%、吸水率15.7%、堆积密度731 kg/m^(3)。In this paper,the ceramsites were produced by simulating sintering machine which constituted through three furnaces of"drying furnace,preheating furnace and sintering furnace".The preheating temperature and preheating time suitable for producing red mud ceramsites were studied,with the focus placed on the influence of preheating temperature and time which were exerted on the basic physical and mechanical properties of red mud ceramsites(such as macro morphology,microstructure,strength,water absorption and bulk density).The results showed that the optimized preheating temperature was 550℃and the preheating time was 15 min.The ceramsites had remarkable ceramic character and rough surface when the red mud ceramsites were sintered under 1,115℃for 15 min.The surface layer of the ceramsites showed typical vitrification characteristics,with uniformly-distributed internal pores.The strength of single grain of red mud ceramsites reached 1.63 MPa,the porosity 41.9%,the water absorption 15.7%and the bulk density 731 kg/m^(3).

关 键 词：预热工艺 赤泥 陶粒 烧成特性 性能 

分 类 号：X758[环境科学与工程—环境工程] TU523[建筑科学—建筑技术科学]