About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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New Directions in Mineral Processing, Extractive Metallurgy, Recycling and Waste Minimization: An EPD Symposium in Honor of Patrick R. Taylor
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Presentation Title |
Comparison of Hydrogen Reduction of Different Lead-bearing Materials for Lead Recovery |
Author(s) |
Asywendi Rukini, M. Akbar Rhamdhani, Geoffrey Alan Brooks, Amy Van den Bulck |
On-Site Speaker (Planned) |
M. Akbar Rhamdhani |
Abstract Scope |
Understanding the fundamental knowledge of lead recovery from lead-bearing materials using hydrogen reductant is essential for developing a carbon-neutral lead production process. Recycling lead from secondary resources using hydrogen as a reducing agent is industrially important to promote a circular economy, resource efficiency, and carbon footprint reduction. The current study evaluates and compares the general reduction mechanism of PbO with a more complex lead-containing compound, PbO-SiO2 glass/slag. Isothermal reductions were carried out on pelletized PbO and PbO-SiO2 (70wt% PbO and 30wt% SiO2) using hydrogen at 350 to 800oC (for PbO) and 300 to 700oC (for PbO-SiO2). The results from microstructural observation showed that uniform, globular, non-wetting lead metal droplets formed on the surface of PbO pellets. In the case of PbO-SiO2, the viscous nature of the glass/slag appeared to hinder diffusion within the pellet, resulting in a low reduction rate. |
Proceedings Inclusion? |
Planned: |
Keywords |
Extraction and Processing, Recycling and Secondary Recovery, Other |