Reaction Sintered Porous Ceramics Using Iron Tailings: Preparation and Properties
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Abstract
(1.北京交通大学机械与电子控制工程学院 轨道车辆安全监测与健康管理研究中心，北京 100044；2.北京建筑材料科学研究总院有限公司 固废资源化利用与节能建材国家重点实验室，北京 100041) 摘 要: 为拓展铁尾矿的资源化利用途径，本研究分别以细颗粒高硅铁尾矿、铁尾矿+石墨粉以及铁尾矿+石墨粉+ 碳化硅粉为原料，采用泡沫注凝成形-常压烧结、泡沫注凝成形-反应烧结和模压成形-反应烧结工艺制备了铁尾矿 多孔陶瓷和三种以碳化硅为主晶相的多孔陶瓷。通过 DSC-TG 和 XRD 分析，研究了铁尾矿自身的烧结过程以及铁 尾矿与石墨之间的碳热还原反应烧结过程，对比分析了四种多孔陶瓷材料的孔隙率、压缩强度、热导率等性能。结 果表明，以铁尾矿为原料可制备出具有较高孔隙率 (87.2%)、压缩强度 (1.37 MPa) 和低热导率 (0.036 W/(m• K)) 的铁尾矿多孔陶瓷， 其是一种高效保温隔热材料； 利用铁尾矿与石墨之间的碳热还原反应可获得碳化硅多孔陶瓷， 其热导率显著提高，但强度偏低；而在原料中加入部分碳化硅，能明显改善多孔陶瓷的压缩强度，获得具有高孔隙 率 (91.6%)、较高压缩强度 (1.19 MPa) 和热导率 (0.31 W/(m
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OpenAlex topics: Recycling and utilization of industrial and municipal waste in materials production · Concrete and Cement Materials Research · Innovations in Concrete and Construction Materials
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References (40)
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