Reducing Fugitive Emissions in Smelting Operations: A CFD-Based Study

Fugitive emissions from smelting operations represent a significant environmental challenge, with their impact on air quality and worker health being a primary concern. In response to increasingly stringent environmental regulations, smelters worldwide are under growing pressure to minimize these emissions. Central to this effort are ventilation systems, which play a crucial role in capturing and treating fugitive fumes. However, designing an effective ventilation system for a smelter using conventional methods can be challenging due to the complexity and variability of the processes involved. Computational Fluid Dynamics (CFD) offers a powerful, state-of-the-art tool that can enhance the design and placement of smelter ventilation systems, identifying potential inefficiencies in hood extraction and regions in the building of potential higher fugitive gases concentrations and accumulations. In this study, we apply CFD to analyze the ventilation system of a typical concept copper smelter building, specifically focusing on the workplace areas around furnaces, converters, anode furnaces, and a casting wheel. The study models and quantifies the dispersion of fugitive gases and dust within the smelter building. We evaluate the efficiency of a base case ventilation system in capturing fugitive emissions under different operational scenarios, providing a comprehensive understanding of its performance for improvements in ventilation designs. The study examines the temperature and velocity distribution throughout the building and identifies high emissions concentration hotspots. By leveraging CFD simulations, we offer actionable insights that can inform the engineering design of more effective, more targeted ventilation systems in a smelter building and help reduce fugitive emissions. This approach represents a best practice framework for improving environmental and occupational health outcomes in smelters.