Outokumpu EvoMaterials initiates sulfidation trials on Kemi chromite from 2021

Outokumpu developed EvoMaterials after 2021 U.S. research on sulfidation chemistries for Kemi chromite. The process replaces carbothermic reduction with alternative separation pathways. Laboratory results indicated simultaneous emission cuts, recovery from low-grade feeds, and treatment of industrial side streams. MIT non-exclusive patent license supported the work under technical director Caspar Stinn.

Data from the trials show recovery of chromium and associated metals without traditional high-temperature coke reduction. Kemi remains the EU’s sole chrome mine, making domestic processing capacity a strategic variable for aerospace, power, and defense supply chains. Professor Antoine Allanore’s models at MIT link rising mineral demand from electrification to reduced Western smelting infrastructure.

Traditional pyrometallurgy optimized yield and scale for over a century but retained core chemical routes. Sulfidation alters separation thermodynamics, enabling lower-grade resource utilization and side-stream valorization. This directly addresses EU critical-materials resilience targets and Scope 3 emission accounting for stainless steel producers.

Next milestones include pilot-scale validation and integration with existing ferrochrome lines. Commercial thresholds require demonstrated 50% cost parity with conventional routes by 2028 while maintaining the reported 67% carbon reduction.