About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Thermodynamics for Sustainability: An EPD Symposium in Honor of Kazuki Morita
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| Presentation Title |
Thermodynamic and Kinetic Investigations of Ferronickel Dissolution and Sulfidation for Carbon-Free Nickel Separation
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| Author(s) |
Hrishikesh Sandeep Nirgude, Adam Powell, Brajendra Mishra, Hyunsoo Jin |
| On-Site Speaker (Planned) |
Hrishikesh Sandeep Nirgude |
| Abstract Scope |
With the rising need for nickel in batteries and stainless steel, this study focuses on a carbon-free route to extract nickel from ferronickel (FeNi) . The research investigates both the thermodynamic foundations and kinetic mechanisms governing ferronickel dissolution in sulfide matte and its subsequent sulfidation behavior.
Examination of the Fe-Ni-S-O quaternary system is carried out to understand the phase equilibria. We heat iron-nickel sulfide matte with ferronickel and sulfur under controlled conditions, tracking weight gain to measure sulfur uptake. The resulting data are interpreted through mass transfer and diffusion theory, resulting in a kinetic model incorporating diffusivity, boundary layer thickness, and interfacial phenomena. Thermodynamic modeling confirms the role of matte composition and sulfur potentials in guiding phase formation, dissolution behavior.. Literature-based diffusivity values support the model and enable estimation of reaction rates.This work provides a fundamental understanding of FeNi separation performance in a Pierce-Smith Converter for sustainable Nickel production. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Extraction and Processing, Pyrometallurgy, Copper / Nickel / Cobalt |