Multiscale Simulation‐Driven Micro‐Bubble Bottom‐Blowing Electrolysis Toward High‐Efficiency Titanium Scrap Recycling

The large‐scale application of titanium is limited by its high production costs, as well as its low utilization and recycling rates. Therefore, efficient recovery of titanium scrap offers a viable pathway to reduce its cost. Molten‐salt electrolysis offers a promising route for upcycling titanium scrap, but the conventional method, which relies solely on ion transport via natural convection, suffers from low efficiency. In this study, we investigated a microbubble bottom‐blowing strategy coupled with molten‐salt electrolysis for the first time. Our multiscale simulation, which included density functional theory (DFT) calculations and a Fluent‐based coupled model, identified and experimentally validated the optimal conditions (1:1 NaCl:KCl ratio and flow rate of 45.2 mL min −1 ). Under these conditions, microbubble agitation enhanced the titanium deposition yield by 24.6% after 10 h of electrolysis compared to conventional electrolysis, effectively suppressed localized coarse dendritic growth, and maintained a high titanium purity above 99%. In summary, microbubble bottom‐blowing molten‐salt electrolysis provides a new route for the highly efficient recovery of titanium scrap.