Use Coal gangue to produce sand and construction materials

Coal gangue production building materials

The use of coal gangue to prepare building materials, mainly including bricks, cement raw materials, ceramic materials, etc.

Production of cement from coal gangue. The main components of coal gangue are SiO2 and Al2O3, which are similar in chemical composition to clay and can replace part of clay to produce cement. The crushed coal gangue and lime are mixed in a certain proportion, and then calcined to obtain clinker mainly composed of calcium silicate, which is then ground with gypsum and other materials to obtain cement with high compressive strength.

Concrete aggregate made of coal gangue. The use of coal gangue in aggregate usually requires certain heat treatment to remove the carbon and organic matter in the gangue, so as to reduce the weak components in the gangue aggregate, and at the same time make the minerals in it edging, generate active substances to improve the aggregate performance Surface activity.

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