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- W2362187832 abstract "The changes in composition and structure of coal gangue during heat and mechanical activation were investigated by means of XRD, IR and nuclear magnetic resonance (NMR). The results show that during calcining process of coal gangue, coal in the coal gangue burned, kaolinite gradually transformed into metakaolin when calcining temperature raised from 500℃ to 700℃. When calcining temperature was up to 900℃, the structure of metakaolin was destroyed absolutely and mullite was formed at 1100℃. According to these experimental results, the model of the kaolinite structure change was founded through analyses and conclusion of the transformation of kaolinite structure during calcining process of coal gangue. The process is as follows: with hydroxyl gradually drew off, among structure of metakaolin, coordinate type of aluminum atoms transformed from hexa-coordinate to tetra-coordinate, while the [SiO4]4-tetrahedron polymerization state remained Q3 type." @default.
- W2362187832 created "2016-06-24" @default.
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- W2362187832 date "2008-01-01" @default.
- W2362187832 modified "2023-09-24" @default.
- W2362187832 title "Changes in Minerial Composition and Structure of Coal Gangue During Heat Activation" @default.
- W2362187832 hasPublicationYear "2008" @default.
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