昆明理工大学 环境科学与工程学院，云南 昆明 650500
龙雨欣（2000—），女，湖南益阳人，昆明理工大学硕士生.E-mail：474489515@qq.com
黄小凤（1972—），女，广西桂林人，昆明理工大学教授，博士生导师，博士.E-mail： hxfkmust@163.com
TU528.04
国家自然科学基金资助项目（52260017）
Faculty of Environmental Science and Engineering， Kunming University of Science and Technology， Kunming 650500， China
以锡尾矿（T）、湖泊底泥（L）、粉煤灰漂珠（F）为原料，水玻璃为黏结剂，制备高强陶粒，利用正交试验、单因素优化试验探究热处理制度及水玻璃掺量对陶粒性能的影响.结果表明：在原料配比为m（T）∶m（L）∶m（F）=65∶25∶10、水玻璃掺量为325 mL/kg、预热温度为600 ℃、烧结温度为1 120 ℃、烧结时间为15 min时，可制备1 h吸水率为0.41%、筒压强度为8.53 MPa、密度等级为600级的高强陶粒；随烧结温度升高，陶粒中物相存在Fe2O3→Fe3O4→MgFe2O4的转化；添加的水玻璃为陶粒提供了部分Si—O键，生成透长石、霞石等晶相，提高了基体强度.
The high strength ceramsite was prepared by using tin tailings（T）， lake sediment（L） and fly ash floating beads（F） as raw materials and sodium silicate as binder. The effects of heat treatment system and sodium silicate content on the properties of ceramsite were investigated by the orthogonal experiment and single factor optimization experiment. The results show that when the raw material ratio of T， L， F by mass is 65∶25∶10， the sodium silicate content is 325 mL/kg， the preheating temperature is 600 ℃， and the sintering temperature is 1 120 ℃ for 15 min， the obtained high strength ceramsite with a density grade of 600 shows the following performance parameters： the 1 h water absorption is 0.41%， the cylinder compressive strength is 8.53 MPa. With the increase of sintering temperature， the phase transformation of Fe2O3→Fe3O4→MgFe2O4 exists in the ceramsite. The addition of sodium silicate provides part of the Si—O bond to form crystal phases such as sanidine， nepheline， which improve the strength of the ceramsite.
龙雨欣,鲍银珠,黄小凤,朱风,刘嘉鑫.锡尾矿基高强陶粒制备及其性能[J].建筑材料学报,2025,28(1):50-57
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