PROCESSING OF SULFATE AND/OR SULFIDE-RICH WASTE USING CO2-ENRICHED GASES TO SEQUESTER CO2, REDUCE ENVIRONMENTAL IMPACTS INCLUDING ACID ROCK DRAINAGE, AND PRODUCE VALUABLE REACTIONPRODUCTS

摘要

A process for stabilizing a sulfate and/or sulfide-rich waste material (comprising metal sulfate and/or sulfide minerals) and sequestering CO2 comprises exposing the material to a CO2-enriched gas mixture, reacting the CO2-enriched gas mixture with the metal sulfate and/or sulfide minerals and forming a CO2-depleted gas mixture and a carbon- 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.