Coal gangue brick and production technology thereof

The invention discloses a coal gangue brick and a production technology thereof. The coal gangue brick is prepared from the following raw materials in parts by weight: 50 to 75 parts of coal gangue skin, 5 to 20 parts of coal ash and 18 to 30 parts of mixture of spoil, sludge and shale. The coal gangue brick is prepared by the following steps: weighing all the raw materials according to weight parts of the raw materials, crushing, stirring, calcining and the like. According to the production technology disclosed by the invention, the coal gangue skin, the coal ash, the mixture of the spoil, the sludge and the shale are selected as the raw materials for firing bricks; solid wastes and construction wastes are recycled, so that the production cost is low, waste of land resources is avoided and exhausted harmful gases are also reduced; in addition, compared with a traditional clay sintered brick, a fired finished brick has the advantages of lighter weight, higher strength and better thermal insulation property. 种