Mechanochemical Transformations in Mixtures of the Silicate Phases of Granite

The effect of mechanical treatment of different degrees of action on the changes in the composition of silicate phases of natural granite is studied. Mechanochemical treatment is demonstrated to cause disordering of silicate structures. Layered hydrosilicates are most easily destroyed, which is explained by their dehydration. This destruction is accompanied by the formation and crystallization of the silicates with more stable framework structure and SiO2. Mechanical treatment of granite leads to the transformation and absorption of bound water and to the decrease of water-loss temperature by 200–300°C. Thermal heating of mechanically activated mixture of granite particles with lime results in the formation of calcium aluminosilicates with IR absorption bands at 1020, 970, and 930 cm−1.