| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ni-Co 2021: The 5th International Symposium on Nickel and Cobalt
|
| Presentation Title |
Sulfuric Acid Leaching for Low-nickel Matte under Atmospheric Pressure |
| Author(s) |
Wanhai Xiao, Fenglong Sun, Xuheng Liu, Zhongwei Zhao |
| On-Site Speaker (Planned) |
Fenglong Sun |
| Abstract Scope |
This research focuses on leaching low-nickel matte through sulfuric acid under atmospheric pressure, in which the Ni/Fe/Co enter into solution, noble elements and Cu2S remain in the residue, and the sulfur in Ni/Fe/Co sulfide is converted to H2S. The subsequent process can be divided into three parts: (1) Fe in the solution is removed by forming hematite or goethite and Ni/Co is separated by organophosphorus extractants; (2) the noble elements and Cu2S are further treated in copper smelting process; (3) H2S is transformed into sulfur by Claus process. Compared with pyrometallurgy for copper-nickel sulfide ores, this method has many advantages, such as low equipment requirement for the atmospheric leaching, high recovery for noble elements and cobalt, convenient storage of sulfur than sulfuric acid, and producing nickel sulfate directly which has higher value than nickel metal. The whole process achieves the comprehensive utilization of low-nickel matte with technical and economic benefits. |
| Proceedings Inclusion? |
Planned: |