1981
- First Zinc Oxide Unit
1985
- Two Zinc Oxide Units French Process
1994
- Research collaboration with CSIR Lab
1996
- Cobalt Refinery
2004
- DRC Operations
2008
- Copper Smelting Plant in DRC
2009
- Zinc Hydromet Unit
2010
- Feed Grade Zinc Oxide Plant
2011
- Cobalt Refinery converted to Catalyst Recycling
2016
- Expansions Catalyst Recycling
2021
- Kepler Resources for Pyromet Catalyst Recycling
2024
- 30,000 MT Catalyst Recycling
- Lithium-Ion Battery Recycling