尉犁蛭石微波膨胀试验研究

Study on Preparation of Expanded Vermiculite by Microwave Irradiation

对新疆尉犁蛭石样品采用微波加热法和900℃电加热法制备膨胀蛭石,并对制备的膨胀蛭石样品进行SEM、XRD分析。结果表明:微波法制备的膨胀蛭石层与层之间分离彻底,层间孔隙多,平均膨胀度大于电加热膨胀蛭石的;蛭石层间距变化小;蛭石层间铁离子没有发生氧化反应,膨胀后颜色为银灰色,蛭石不发脆。对蛭石样品用不同功率相同时间、相同功率不同时间微波加热后发现:微波加热时间为50s、功率为400W时蛭石的膨胀度最大。

Using the vermiculite ore from Yuli of Xinjiang as raw material,the expanded vermiculite was prepared respectively by microwaveirradiation and electric heating at 900℃. The microstructure of expanded vermiculite was characterized with XRD and SEM. Experimental resultsindicated that the expanded vermiculite prepared by microwave irradiation had more gap between completely separate layers,greater volume yield and less changed layer distance compared with electric heating method and was not friable with silver...