TY JOUR TI Key Technologies for Treating Coal-Mining Wastes And Extracting Rare Earth Metals KW Coal waste deposits KW rare metals KW aluminum KW germanium KW gallium KW biochemical leaching KW sulfuric acid KW Thioferrooxidans bacteria JO Proceedings of Petersburg Transport University AU Harlamova, A.V. AU Vereh-Belousova, E.I. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"