Recovery of valuable components from coal consumption waste Tatiana Cherkasova, Elizaveta Cherkasova, Anastasia Tikhomirova, Andrey Golovachev and Andrey Papin E3S Web Conf., 303 (2021) 01041 Published online: 17 September 2021 DOI: 10.1051/e3sconf/202130301041