Effect of Heat Treatment on Properties of Mineral Attapulgite
(0) Mineral attapulgite powders were heat treated at different temperature from 100℃ to 800℃. The effect of heat treatment on properties of attapulgite were studied by particle size distribution, surface free energy, and water vapor adsorption performance. The results show that the medium particle size and surface free energy of attapulgite increase and hygroscopic capacity promptly reduce with the increase of heat temperature.The medium particle size of the raw palygorskite is 3.09 μm, and it becomes 14.12 μm after heat treatment at 800℃. The surface free energy, polarity component and dispersion component of the natural attapulgite are 45.16mN-m-1,13.92mN. m1, 31.24mN.ml, respectively, and they become 116.22 mN. m-1, 116.22 mN.m-1, 0.0 mN.ml after heat treatment at 800℃. Moreover, the hygroscopic capacity of attapulgite in 24h decreases from 17.1％ to 5.6％ after heat treatment at 800℃.
attapulgite heat treatment size distribution surface free energy water vapor adsorption
TANG Qingguo LIANG Jinsheng MENG Junping WANG Fei LI liwei LI Yangxian
Institute of Power Source & Ecomaterials Science,Hebei University of Technology 300130 Tianjin,China
国际会议
2008国际粉体技术与应用论坛暨全国粉体产品与设备应用技术交流大会
北京
英文
41-46
2008-04-01（万方平台首次上网日期，不代表论文的发表时间）