A new concept for the transformation of coal mines into an industrial and economic complex with an expanded use of mineral resources in a closed cycle
Data: Poniedziałek 27.02.2023
Sesja: Nowe techniki i technologie w podziemnej eksploatacji złóż
Godzina/Sala: 18:15 - 18:30 - A
Tytuł: A new concept for the transformation of coal mines into an industrial and economic complex with an expanded use of mineral resources in a closed cycle
Title: A new concept for the transformation of coal mines into an industrial and economic complex with an expanded use of mineral resources in a closed cycle
The concept is integrated mining of mineral and raw material resources that are located underground and on the surface of coal mines. The integrity of mining minerals from the mine is as follows. Traditionally, coal is mined and associated methane gas is extracted, delivered to the surface and transformed into electricity in the cogeneration plants; water pumped to the surface passes through heat pumps, so we obtain additional heat for the needs of the mine; this water is then desalinated using the reverse osmosis method, resulting in clean water – drinking, technical or for plants, depending on the needs; desalination waste, in turn, is evaporated, using for this purpose cheap thermal energy from the combustion of coal sludge in special thermal units that fully meet environmental requirements. In turn, the resulting chemical substances, such as СаCl2, MgCl2, NaCl, KCl and other liquid products, are successfully sold on the industrial and road construction market; in addition, when water is evaporated, a distillate is formed, which is the initial product for producing “green” hydrogen by electrolysis, and electricity is taken from cogeneration plants when burning degassing methane. Thus, a closed chain of integrated mining and processing of minerals is proposed with a significant reduction in the negative impact on the environment. Based on the ESG-strategy, the economic-mathematical “Multibusiness” model has been substantiated for integrated mining of mineral resources at coal mines.