What are the disposal methods of coal gangue?

Treatment capacity of coal gangue: 1. Recovery of coal and pyrite: good coal is washed from coal gangue by simple process, poor coal is selected from it by screening, and pyrite is selected. Recovered coal can be used as fuel for power boilers, coal gangue washing can be used as building materials, and pyrite can be used as chemical raw materials. 2. Used for power generation: mainly using mixed combustion of coal washing and gangue washing to generate power. China has used a fluidized bed furnace to burn a mixture of clean coal and gangue (calorific value is about 2000 kcal per kilogram) to generate electricity. Slag can produce slag brick and slag cement. The main components of coal gangue are Al2O3 and SiO2. In addition, it also contains different amounts of Fe2O3, CaO, MgO, Na2O, K2O, P2O5, SO3 and trace rare elements (gallium, vanadium, titanium and cobalt). Coal gangue includes coal gangue excavated in the process of roadway excavation, and the treatment method that coal gangue will disintegrate after absorbing water during mining, which affects the utilization of ground resources and often affects the surrounding ecological environment.

Third, sulfur dioxide. When the coal gangue piles piled in the open air are eroded by rain. Germany, Germany, the United States and the Netherlands have built coal power plants and coal preparation plants together: most of the coal gangue yards are located near the wellhead.