Processing of sulfide-rich waste using CO2-enriched gases to sequester CO2, reduce environmental impacts including acid rock drainage and to produce valuable reaction products
Processing of sulfate and/or sulfide-rich waste using C0 2-enriched gases to sequester C0 2, reduce environmental impacts including acid rock drainage, and produce valuable reaction products Abstract A process for stabilizing a waste material rich in a metal-sulfate compound and/or rich in a metal-sulfide compound and sequestering CO 2 comprises exposing the material to a C0 2 enriched gas mixture, reacting the C0 2-enriched gas mixture with the metal sulfide minerals and forming a C0 2-depleted gas mixture and a carbonate-containing compound and at least one product selected from the group consisting of a purified metal or a metal-rich compound suitable for smelting or refining, sulfuric acid, sulfur and sulfurous acid, and system and apparatus therefor. 11316896v2 k -N Ha K N ~4". $8 C ';:: ~, j K? >1 a / fl Rib 0 t In S N) 4- I. $8 & ~. -~ bzz~ / 'N,~$ cn
