|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||REWAS 2022: Recovering the Unrecoverable
||Utilization of Copper Nickel Sulfide Mine Tailings for CO2 Sequestration and Enhanced Nickel Sulfidization
||Fei Wang, David Dreisinger, Glenn Barr
|On-Site Speaker (Planned)
Global warming mitigation is carrying out under two strategies of reducing CO2 emissions and encouraging battery-powered electrical vehicles. Enhancing nickel sulfide production is significant to increase battery supply. Nickel in olivine which is an important mineral of many nickel sulfide mines and suitable for permanent CO2 sequestration, is regarded as non-recoverable and discarded in mine tailings as wastes. This work confirms that a copper nickel sulfide flotation mine tailing in Minnesota as a case study can be used for directly accelerated mineral carbonation and concurrent sulifidization. In addition to converting magnesium and iron silicates to mineral carbonates for permanent CO2 storage, nickel in olivine is concurrently converted to nickel sulfide for potential recovery. The mineral carbonation of olivine is the dominant chemical reaction process and provides the precondition for nickel sulfidization. A pre-concentration step of olivine from tailings is recommended to enrich olivine and nickel contents for potential application.
||Hydrometallurgy, Copper / Nickel / Cobalt, Recycling and Secondary Recovery