|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Rare Metal Extraction & Processing
||Recycling of discarded tubular lamps through different processing routes for recovery of rare earth values
||Neha Shukla, Nikhil Dhawan
|On-Site Speaker (Planned)
The recovery of rare earth elements (REE) from trichromatic phosphors is gaining significant attention because of REE supply concerns and resource conservation. The present study investigates different routes comprising combined chemical, mechanical, thermal, and microwave energies for the disintegration of phosphor phases for REE recovery. Different fluxes were tried for the thermal decomposition of mixed phosphor samples. The refractory phosphors were also dissociated via the mechanical activation route and the dielectric properties were also measured to assess microwave processing. Mechanical activation showed a lowering of the requisite decomposition temperature during microwave exposure. The process mass balance revealed that ball milling followed by acid leaching offers higher REE recovery compared to the feed. The processing routes are compared based on energy considerations and product specifications.